Online monitoring device for biochemical sludge and automatic water supply control method

Abstract

The present invention relates to the technical field of biochemical sludge monitoring and control, and discloses an on-line monitoring device for biochemical sludge and an automatic water supply control method. The method includes: obtaining the time difference between the initial moment when the water pump is started and the current moment; obtaining the visual liquid level height information of the waste water sample to be monitored monitored by the camera at the current moment; obtaining the actual liquid level height information of the waste water sample to be monitored monitored by the infrared liquid level sensor at the current moment; determining the current state information of the waste water sample to be monitored according to the time difference, the visual liquid level height information and the actual liquid level height information; and controlling the start or stop of the water pump according to the current state information of the waste water sample to be monitored, so as to perform automatic water supply control on the observation bottle. The present invention performs real-time monitoring and automatic water supply control on the observation bottle according to multi-modal data, improves the automatic control efficiency and accuracy of on-line monitoring of biochemical sludge, and further improves the water treatment effect.

Description

Technical Field

[0001] The present invention relates to the technical field of biochemical sludge monitoring and control, and particularly relates to an on-line monitoring device for biochemical sludge and an automatic water supply control method. Background Art

[0002] With the continuous advancement of urbanization and industrialization, the increasingly strict environmental protection policies, and the improvement of the public's environmental protection awareness, the monitoring and control of biochemical sludge have become a crucial part of sewage treatment. Among them, the water supply control technology is an important link affecting the monitoring results of biochemical sludge and the sewage treatment effect.

[0003] In the related art, the monitoring of biochemical sludge relies on regular sampling and laboratory analysis. Not only does the sampling take a long time, but also changes may occur during the transportation or storage of samples, resulting in inaccurate subsequent monitoring data. In addition, there are also problems such as manual operation errors, complex analysis instruments, and high costs in laboratory analysis. At the same time, the water supply control mostly relies on sensors such as float switches, pressure sensors, ultrasonic level gauges, capacitive level sensors, and vision sensors to achieve. However, the method of using the above single type of sensor for water supply control has the following deficiencies: First, it is easily affected by external factors, resulting in a decrease in the accuracy of the sensor; Second, in a complex industrial environment, the sensor is prone to failure or malfunction, which not only makes the maintenance difficult, but also causes deviation in the water supply control; Third, in a rapidly changing water treatment environment, the liquid level fluctuation may exceed the response time of the control system, resulting in overload or underload of the water supply control system in a short time, affecting the subsequent water treatment effect; Fifth, the water supply control process requires manual intervention, and the operation efficiency is low. Summary of the Invention

[0004] In view of this, the present invention provides an on-line monitoring device for biochemical sludge and an automatic water supply control method to solve one or more technical problems existing in the related art.

[0005] In a first aspect, the present invention provides an on-line monitoring device for biochemical sludge, comprising:

[0006] An observation bottle for containing the wastewater sample to be monitored, wherein the wastewater sample to be monitored contains biochemical sludge;

[0007] A wastewater tank for containing wastewater; the wastewater contains biochemical sludge;

[0008] A water pump, which is respectively connected to the wastewater tank and the observation bottle, and is used for pumping the wastewater in the wastewater tank into the observation bottle;

[0009] A camera, which is arranged on one side of the observation bottle and is used for monitoring the visual liquid level height information of the wastewater sample to be monitored in the observation bottle;

[0010] An infrared liquid level sensor is provided on the outer wall of the observation bottle and is located below the first water pumping port away from the observation bottle, and is used to monitor the actual liquid level height information of the wastewater sample to be monitored in the observation bottle;

[0011] An industrial control computer is electrically connected to the water pump, the infrared liquid level sensor and the camera respectively, and is used to obtain the time difference between the initial moment and the current moment when the water pump is started; and is used to obtain the visual liquid level height information of the wastewater sample to be monitored monitored by the camera at the current moment; and is used to obtain the actual liquid level height information of the wastewater sample to be monitored monitored by the infrared liquid level sensor at the current moment; and is used to determine the current state information of the wastewater sample to be monitored according to the time difference, the visual liquid level height information and the actual liquid level height information; and is used to control the start or stop of the water pump according to the current state information of the wastewater sample to be monitored, so as to perform automatic water supply control on the observation bottle.

[0012] A biochemical sludge on-line monitoring device provided by an embodiment of the present invention can better master each link of sludge treatment by performing real-time on-line monitoring and automatic water supply control on the biochemical sludge in the observation bottle, and avoid problems of water treatment decline caused by monitoring lag or improper control; by fusing visual liquid level height information, infrared liquid level sensor data and time difference, more comprehensive and accurate liquid level information is provided, and through cross-verification of multi-modal data, measurement errors of a single sensor are avoided, and various interferences in a complex environment can be effectively coped with, ensuring the reliability of the system; according to the current state information determined from the multi-modal data obtained in real time, the water supply process is automatically adjusted, reducing manual intervention, improving the automation level and operation efficiency of the system; it can quickly respond to liquid level changes, ensure the efficiency and stability of the water supply process, and is particularly suitable for high-load environments such as industrial wastewater treatment; since non-contact sensors, namely cameras and infrared liquid level sensors, are used, and at the same time, the industrial control computer analyzes the state information of multi-modal data and executes control instructions, frequent manual maintenance and calibration are not required during operation, reducing the maintenance cost and operation risk, and improving the economic benefits of the overall system.

[0013] In some alternative embodiments, the industrial control computer is further used to compare the visual liquid level height information with a first preset value to determine the first state information of the wastewater sample to be monitored; and is further used to compare the actual liquid level height information with the detection position of the infrared liquid level sensor to determine the second state information of the wastewater sample to be monitored; and is further used to compare the time difference with a second preset value to determine the third state information of the wastewater sample to be monitored.

[0014] In some alternative embodiments, a drain valve is respectively communicated with the wastewater pool and the observation bottle, and is used to drain the wastewater sample to be monitored in the observation bottle into the wastewater pool;

[0015] The camera is also used to monitor the liquid level change of the wastewater sample to be monitored in the observation bottle;

[0016] The industrial control computer is electrically connected to the drain valve, and is also used to control the drain valve to open after the monitoring of the wastewater sample to be monitored in the observation bottle is completed, so as to discharge the wastewater sample in the observation bottle into the wastewater pool; and is also used to control the drain valve to close when the liquid level of the wastewater sample to be monitored in the observation bottle drops to the third preset value; and is also used to control the drain valve to be in a normally closed state when automatically filling water into the observation bottle.

[0017] In some alternative embodiments, the device further includes:

[0018] A clear water tank for holding clear water;

[0019] A pumping valve, which is respectively communicated with the clear water tank and the observation bottle, and is used to pump the clear water in the clear water tank into the observation bottle;

[0020] A spraying device, which is communicated with the pumping valve and is arranged at the second water pumping port of the observation bottle, and is used to spray clear water on the inner wall of the observation bottle;

[0021] The industrial control computer is electrically connected to the pumping valve, and the industrial control computer is also used to control the pumping valve and the drain valve to open after the inner wall of the observation bottle is cleaned, so as to clean the inner wall of the observation bottle and discharge the wastewater after cleaning into the wastewater pool.

[0022] In some alternative embodiments, the device further includes:

[0023] A vacuum break valve, which is communicated with the observation bottle;

[0024] A vacuum valve, which is communicated with the vacuum break valve;

[0025] The industrial control computer is respectively electrically connected to the vacuum valve and the vacuum break valve, and the industrial control computer is also used to control the vacuum valve and the vacuum break valve to open when the water pump is in a starting state, so as to evacuate the observation bottle; and is also used to control the vacuum break valve to open when the drain valve is in an open state, so as to change the vacuum state in the observation bottle to a non-vacuum state.

[0026] In a second aspect, the present invention also provides an automatic water filling control method, which is applied to an on-line monitoring device for biochemical sludge, and the method includes:

[0027] Obtaining the time difference between the initial moment when the water pump is started and the current moment;

[0028] Obtaining the visual liquid level height information of the wastewater sample to be monitored monitored by the camera at the current moment;

[0029] Obtain the actual liquid level height information of the wastewater water sample to be monitored by the infrared liquid level sensor at the current moment;

[0030] Determine the current state information of the wastewater water sample to be monitored according to the time difference, the visual liquid level height information, and the actual liquid level height information;

[0031] Control the start or stop of the water pump according to the current state information of the wastewater water sample to be monitored, so as to perform automatic water supply control on the observation bottle.

[0032] In some alternative embodiments, the determining the current state information of the wastewater water sample to be monitored according to the time difference, the visual liquid level height information, and the actual liquid level height information includes:

[0033] Compare the visual liquid level height information with a first preset value to determine the first state information of the wastewater water sample to be monitored;

[0034] Compare the actual liquid level height information with the detection position of the infrared liquid level sensor to determine the second state information of the wastewater water sample to be monitored;

[0035] Compare the time difference with a second preset value to determine the third state information of the wastewater water sample to be monitored.

[0036] In some alternative embodiments, the first state information includes: the visual liquid level height information is greater than or equal to the first preset value, and the visual liquid level height information is less than the first preset value; the second state information includes: the actual liquid level height information is lower than the detection position of the infrared liquid level sensor, and the actual liquid level height information is higher than or equal to the detection position of the infrared liquid level sensor; the third state information includes: the time difference is greater than or equal to the second preset value, and the time difference is less than the second preset value;

[0037] After determining the current state information of the wastewater water sample to be monitored according to the time difference, the visual liquid level height information, and the actual liquid level height information, the method further includes:

[0038] Encode the time difference, the visual liquid level height information, and the actual liquid level height information; encode the first state information, the second state information, and the third state information respectively.

[0039] In some alternative embodiments, the controlling the start or stop of the water pump according to the current state information of the wastewater water sample to be monitored to perform automatic water supply control on the observation bottle includes:

[0040] Establish a correspondence relationship between the current state information of the wastewater water sample to be monitored and the start or stop of the water pump;

[0041] Determine the water supply control instruction according to the corresponding relationship and the current status information of the waste water sample to be monitored;

[0042] Automatically control the water supply to the observation bottle according to the water supply control instruction.

[0043] In some alternative embodiments, the corresponding relationship between the current status information of the waste water sample to be monitored and the start or stop of the water pump includes:

[0044] When the visual liquid level height information is less than the first preset value, and the actual liquid level height information is lower than the detection position of the infrared liquid level sensor, and the time difference is less than the second preset value, control the water pump to start;

[0045] When the visual liquid level height information is greater than the first preset value, control the water pump to stop;

[0046] When the visual liquid level height information is less than the first preset value, and the actual liquid level height information is equal to the detection position of the infrared liquid level sensor, control the water pump to stop;

[0047] When the visual liquid level height information is less than the first preset value, and the actual liquid level height information is not blocked by the waste water sample to be monitored, and the time difference is greater than the second preset value, control the water pump to stop. Description of the Drawings

[0048] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0049] Figure 1 is a schematic structural diagram of an on-line monitoring device for biochemical sludge according to an embodiment of the present invention;

[0050] Figure 2 is a schematic flow chart of an automatic water supply control method according to an embodiment of the present invention.

[0051] Explanation of the Reference Numerals in the Drawings:

[0052] 100, on-line monitoring device for biochemical sludge; 1, observation bottle; 101, first water pumping port; 102, second water pumping port; 103, first drainage port; 2, waste water tank; 3, water pump; 4, camera; 5, infrared liquid level sensor; 6, industrial control computer; 7, drainage valve; 8, clean water tank; 9, water pumping valve; 10, spray device; 11, vacuum breaker valve; 12, vacuum valve. Detailed Embodiments

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0054] Online monitoring of biochemical sludge is a crucial part of the sewage treatment process. Especially in the context of the continuous advancement of urbanization and industrialization, sewage treatment plants require more efficient and accurate monitoring and control means to ensure that the effluent quality meets the national specified discharge standards. With the increasingly strict environmental protection policies and the improvement of the public's environmental awareness, sludge treatment is no longer just simple solid-liquid separation, but more involves the online monitoring and process control of biochemical reactions in the sludge.

[0055] In related technologies, when sewage treatment plants monitor biochemical sludge, they usually rely on regular sampling and laboratory analysis, which not only takes a long time but also has the risk of inaccurate data due to changes during sample storage and transportation. In addition, laboratory analysis also faces problems such as manual operation errors, complex analysis instruments, and high costs. To improve the real-time, accuracy, and economy of biochemical sludge monitoring, providing an instrument that can online, real-time, and automatically monitor the active state of biochemical sludge has become a technical problem that urgently needs to be solved.

[0056] The core of the formation of biochemical sludge lies in the efficiency of microorganisms in degrading organic matter, and this efficiency directly affects the effluent quality. Therefore, obtaining real-time and online parameter data of biochemical reactions in the sludge (such as the mud-water level, sedimentation ratio, component concentration, and reaction rate of the water sample in the sludge), and timely adjusting the sludge treatment process are important measures to ensure the stable operation of the sewage treatment process.

[0057] During the online monitoring process of biochemical sludge, the water supply control is also an important link that affects the monitoring results and the sludge treatment effect.

[0058] In the related art, most water filling controls are realized by means of a single type of sensor such as a float switch, a pressure sensor, an ultrasonic liquid level gauge, a capacitive liquid level sensor, a vision sensor, etc. Specifically, (1) Float switch: Controls the on / off of the switch through the rise and fall of the float to achieve automatic liquid level control. However, the sensitivity and accuracy of its liquid level control are relatively low, and it is easily affected by liquid viscosity, impurities, and the shape of the container, resulting in unstable liquid level control. In addition, the float switch is prone to mechanical failures in complex environments and is difficult to maintain. (2) Pressure sensor: Calculates the liquid level height by detecting the pressure generated by the liquid at the bottom of the container. However, the measurement result is easily affected by liquid density and temperature changes, and it is prone to failure in high-temperature and high-pressure environments. In addition, the installation and maintenance of the sensor itself are relatively complex and costly. (3) Ultrasonic liquid level gauge: Determines the liquid level height by emitting ultrasonic waves and receiving the reflected waves on the liquid surface and calculating the acoustic wave propagation time. However, it is easily affected by factors such as environmental temperature, bubbles, and agitated liquids, resulting in measurement errors. In addition, ultrasonic signals are easily affected by electromagnetic interference in complex industrial environments, affecting the stability of measurement. (4) Capacitive liquid level sensor: Determines the liquid level height by measuring the change in the dielectric constant of the liquid. However, it is easily affected by liquid conductivity and temperature changes, and has high installation requirements. In addition, in liquids containing a large amount of impurities or foam, the measurement result is easily distorted. (5) Vision sensor: Collects liquid level images through a camera and uses image processing algorithms to detect the position of the liquid surface, which is easily affected by light conditions, liquid color, and transparency.

[0059] In summary, there are many deficiencies in using a single sensor for water filling control: First, it is easily affected by external factors, resulting in a decrease in the accuracy of the sensor; Second, in a complex industrial environment, the sensor is prone to failure or malfunction, which not only makes maintenance difficult but also causes deviation in water filling control; Third, in a rapidly changing water treatment environment, the liquid level fluctuation may exceed the response time of the control system, resulting in overload or underload phenomena in the water filling control system in a short time, affecting the subsequent water treatment effect; Fifth, the water filling control process requires manual intervention, resulting in low operating efficiency.

[0060] Based on this, according to an embodiment of the present invention, an on-line monitoring device for biochemical sludge is provided, which is applied to application environments such as urban sewage treatment plants, industrial wastewater treatment, laboratory sludge treatment research, and environmental protection monitoring water treatment. Figure 1 The structural schematic diagram of the on-line monitoring device for biochemical sludge according to the embodiment of the present invention is shown. As Figure 1 shown, the embodiment of the present invention provides an on-line monitoring device 100 for biochemical sludge, including: an observation bottle 1, a wastewater tank 2, a water pump 3, a camera 4, an infrared liquid level sensor 5, and an industrial control computer 6.

[0061] Among them, the observation bottle 1 is used to hold the wastewater sample to be monitored, and the wastewater sample to be monitored contains biochemical sludge; the wastewater tank 2 is used to hold wastewater; the wastewater contains biochemical sludge; the water pump 3 is respectively connected to the wastewater tank 2 and the observation bottle 1, and the water pump 3 is used to pump the wastewater in the wastewater tank 2 into the observation bottle 1; the camera 4 is arranged on one side of the observation bottle 1, and the camera 4 is used to monitor the visual liquid level height information of the wastewater sample to be monitored in the observation bottle 1; the infrared liquid level sensor 5 is arranged on the outer wall of the observation bottle 1 and is located below the first water intake 101 far from the observation bottle 1, and the infrared liquid level sensor 5 is used to monitor the actual liquid level height information of the wastewater sample to be monitored in the observation bottle 1; the industrial control computer 5 is respectively electrically connected to the water pump 3, the infrared liquid level sensor 5 and the camera 4, and the industrial control computer 5 is used to obtain the time difference between the initial moment when the water pump 3 is started and the current moment, and is used to obtain the visual liquid level height information of the wastewater sample to be monitored monitored by the camera 4 at the current moment; and is used to obtain the actual liquid level height information of the wastewater sample to be monitored monitored by the infrared liquid level sensor 5 at the current moment; and is used to determine the current state information of the wastewater sample to be monitored according to the time difference, the visual liquid level height information and the actual liquid level height information; and is used to control the start or stop of the water pump 3 according to the current state information of the wastewater sample to be monitored, so as to perform automatic water supply control on the observation bottle 1.

[0062] Among them, the water pump 3 is respectively connected to the wastewater tank 2 and the observation bottle 1. Preferably, the water pump 3 is respectively connected to the wastewater tank 2 and the observation bottle 1 through pipelines. One end of the water pump is directly inserted into the wastewater tank 2 through a pipeline, and the other end is connected to the first water intake 101 of the observation bottle 1 through a pipeline. Both the observation bottle 1 and the wastewater tank 2 hold wastewater containing biochemical sludge. When the water pump 3 is in the starting state, the wastewater in the wastewater tank 2 can be used as a supplement for water supply to the observation bottle 1.

[0063] The camera 4 is installed on one side of the observation bottle 1 and is used to capture the water body edge information of the wastewater sample to be monitored in the observation bottle 1, and further monitor the visual liquid level height information of the wastewater sample to be monitored. The camera 4 is preferably an industrial camera.

[0064] The infrared liquid level sensor 5 is a non-contact sensor, and its core components are an infrared emitting tube and a photosensitive receiver. When the liquid level of the wastewater sample to be monitored does not reach the detection position of the infrared liquid level sensor 5, the light emitted by the infrared emitting tube is directly irradiated onto the receiving tube after being refracted by the lens, and the receiving tube will generate a corresponding high-level signal after receiving the light. When the liquid level of the wastewater sample to be monitored reaches the detection position of the infrared liquid level sensor 5, the light cannot be directly refracted onto the receiving tube, resulting in the receiving tube being unable to receive the light or only receiving a small amount of light. At this time, the receiving tube outputs a low-level signal or does not output a signal. Therefore, the industrial control computer 6 can judge the actual liquid level height of the wastewater sample to be monitored according to the state of the received level signal. The infrared liquid level sensor 5 is installed on the outer wall of the observation bottle 1 and is located below the first water pumping port 301 away from the observation bottle 1, so as to prevent the wastewater flowing out of the first water pumping port 301 from interfering with the information of the actual liquid level height monitored by the infrared liquid level sensor 5 when the water pump 3 pumps the wastewater in the wastewater tank 2 into the observation bottle 1.

[0065] It should be noted that before the biochemical sludge on-line monitoring device 100 starts to run, the camera 4 can be set for white balance, focal length, exposure, etc., to ensure that the obtained visual liquid level height information is accurate. The specific setting parameters can be set according to actual needs and are not limited here; the infrared liquid level sensor 5 can also be calibrated to ensure that the information of the actual liquid level height monitored by the infrared liquid level sensor 5 is consistent with the liquid level height of the wastewater sample to be monitored in the observation bottle 1. The specific calibration method and parameter setting can be set according to actual needs and are not limited here.

[0066] The industrial control computer 6 can include programmable logic control components (such as PLC or CPU), a memory, and electronic components connected to the programmable logic control components, etc., which are well-known to those skilled in the art and will not be elaborated here.

[0067] The biochemical sludge on-line monitoring device 100 of this embodiment can automatically control the water supply to the observation bottle 1 with the help of the industrial control computer 6.

[0068] Exemplarily, when the biochemical sludge on-line monitoring device 100 starts to run, the water pump 3, the camera 4, the infrared liquid level sensor 5, and the industrial control computer 5 are started. The camera 4 starts to monitor the visual liquid level height information of the wastewater sample to be monitored in the observation bottle 1, and the infrared liquid level sensor 5 starts to monitor the actual liquid level height information of the wastewater sample to be monitored in the observation bottle 1. The industrial control computer 6 starts timing from the initial moment when the water pump 3 starts.

[0069] When automatic water supply control is required for the observation bottle 1, the industrial control computer 6 obtains the visual liquid level height information of the wastewater water sample to be monitored detected by the camera 4 at the current moment, and the actual liquid level height information of the wastewater water sample to be monitored detected by the infrared liquid level sensor 5 at the current moment; and obtains the time difference from the initial moment when the water pump 3 is started to the current moment. Among them, the time difference can record the time stamp at the current moment while the industrial control computer 6 obtains the visual liquid level height information and the actual liquid level height information, and is determined according to the timing time at the initial moment when the water pump 3 is started and the time stamp at the current moment. Obtaining the time difference can ensure the synchronization of the acquisition information of the camera 4, the infrared liquid level sensor 5 and the industrial control computer 6. At the same time, the acquisition information of the foregoing three constitutes multimodal data.

[0070] It should be noted that starting to time from the initial moment when the water pump 3 is started can be expressed as starting to count down the time required for the liquid level of the wastewater water sample to be monitored to rise to the set liquid level, or starting to count positively with the moment when the liquid level of the wastewater water sample to be monitored in the observation bottle 1 starts to rise as the zero moment.

[0071] Then, the industrial control computer 6 determines the current state information of the wastewater water sample to be monitored according to the obtained multimodal data; and according to the current state information of the wastewater water sample to be monitored, it can be judged whether the observation bottle 1 needs to be supplied with water at the current moment. If continuous water supply is required, the industrial control computer 6 controls the water pump 3 to remain in the starting state; when water supply needs to be stopped, the industrial control computer 6 controls the water pump 3 to stop, so as to realize automatic water supply control for the observation bottle 1.

[0072] A biochemical sludge on-line monitoring device provided by an embodiment of the present invention can better master each link of sludge treatment and avoid problems of water treatment decline caused by monitoring lag or improper control through real-time on-line monitoring and automatic water supply control of biochemical sludge in an observation bottle; by fusing visual liquid level height information, infrared liquid level sensor data and time difference, more comprehensive and accurate liquid level information is provided. Through cross-verification of multimodal data, measurement errors of a single sensor are avoided, various interferences in a complex environment can be effectively coped with, and the reliability of the system is ensured; according to the current state information determined from the multimodal data obtained in real time, the water supply process is automatically adjusted, manual intervention is reduced, and the automation level and operation efficiency of the system are improved; it can quickly respond to liquid level changes, ensure the high efficiency and stability of the water supply process, and is particularly suitable for high-load environments such as industrial wastewater treatment; since non-contact sensors, namely cameras and infrared liquid level sensors, are used, and at the same time, the industrial control computer is used to analyze state information and execute control instructions on multimodal data, frequent manual maintenance and calibration are not required during operation, the maintenance cost and operation risk are reduced, and the economic benefits of the overall system are improved.

[0073] In some alternative embodiments, the industrial control computer 6 is further configured to compare the visual liquid level height information with a first preset value to determine the first state information of the wastewater sample to be monitored; and is further configured to determine the second state information of the wastewater sample to be monitored according to the actual liquid level height information; and is further configured to compare the time difference with a second preset value to determine the third state information of the wastewater sample to be monitored.

[0074] As can be seen from the foregoing, the actual liquid level height information of the wastewater sample to be monitored in the observation bottle 1 can be converted into an electrical signal. According to the level of the electrical signal, the detection position relationship with the infrared liquid level sensor 5 can be judged. When it is a high level, the actual liquid level height information is lower than the detection position of the infrared liquid level sensor 5, that is, the detection position of the infrared liquid level sensor 5 is not blocked by the wastewater sample to be monitored; when it is a low level or there is no output electrical signal, the actual liquid level height information is equal to the detection position of the infrared liquid level sensor 5, that is, the detection position of the infrared liquid level sensor 5 is blocked by the wastewater sample to be monitored. Therefore, in the embodiment of the present invention, the working principle of the infrared liquid level sensor 5 is used to judge whether the liquid is blocked, and further determine whether the liquid level of the wastewater sample to be monitored reaches the detection position of the infrared liquid level sensor 5, and use it as the second state information.

[0075] In some alternative embodiments, the biochemical sludge on-line monitoring device 100 further includes: a drain valve 7.

[0076] The drain valve 7 is respectively connected to the wastewater tank 2 and the observation bottle 1, and the drain valve 7 is used to drain the wastewater sample to be monitored in the observation bottle 1 into the wastewater tank 2.

[0077] The camera 4 is further configured to monitor the liquid level change of the wastewater sample to be monitored in the observation bottle 1;

[0078] The industrial control computer 6 is electrically connected to the drain valve 7. The industrial control computer 6 is further configured to control the drain valve 7 to open after the monitoring of the wastewater sample to be monitored in the observation bottle 1 is completed, and drain the wastewater sample in the observation bottle 1 into the wastewater tank 2; and is further configured to control the drain valve 7 to close when the liquid level of the wastewater sample to be monitored in the observation bottle 1 drops to a third preset value; and is further configured to control the drain valve 7 to be in a normally closed state when automatically filling water into the observation bottle 1.

[0079] Among them, the drain valve 7 is respectively connected to the wastewater tank 2 and the observation bottle 1. Preferably, one end of the drain valve is directly connected to the first drain port 103 of the observation bottle, and the other end is directly inserted into the wastewater tank 2 through a pipeline.

[0080] After the monitoring of the wastewater sample to be monitored in the observation bottle 1 is completed, the industrial control computer 6 will open the drain valve 7. At this time, the wastewater sample to be monitored in the observation bottle 1 is discharged from the observation bottle 1 into the wastewater tank 2. At the same time, the industrial control computer 6 also needs to observe the liquid level change monitored by the camera 4. When the liquid level drops to the third preset value, the drain valve 7 is closed.

[0081] It should be noted that the third preset value can be set according to actual needs and is not limited here.

[0082] The industrial control computer 6 can also control the drain valve 7 to be in a normally closed state during the process of automatically filling water into the observation bottle 1.

[0083] In some alternative embodiments, the biochemical sludge on-line monitoring device 100 further includes: a clean water tank 8, a pumping valve 9, and a spraying device 10.

[0084] Among them, the clean water tank 8 is used to hold clean water; the pumping valve 9 is respectively connected to the clean water tank 8 and the observation bottle 1. The pumping valve 9 is used to pump the clean water in the clean water tank 8 into the observation bottle 1; the spraying device 10 is connected to the pumping valve 9 and is arranged at the second water pumping port 102 of the observation bottle. The spraying device 10 is used to spray clean water on the inner wall of the observation bottle 1; the industrial control computer 6 is electrically connected to the pumping valve 9. The industrial control computer 6 is also used to control the pumping valve 9 and the drain valve 7 to open after the cleaning of the observation bottle 1 is completed, so as to clean the inner wall of the observation bottle 1 and discharge the cleaned wastewater into the wastewater tank 2.

[0085] Among them, the pumping valve 9 is respectively connected to the clean water tank 8 and the observation bottle 1. Preferably, the pumping valve 9 is respectively connected to the clean water tank 8 and the observation bottle 1 through pipelines. One end of the pumping valve 9 is directly inserted into the clean water tank 8 through a pipeline, and the other end is connected to the second water pumping port 102 of the observation bottle 1 through a pipeline. The spraying device 10 is connected to the pumping valve 9 at the second water pumping port 102. Preferably, the second water pumping port 102 is located at the top of the observation bottle 1.

[0086] When the observation bottle 1 needs to be cleaned, that is, when the automatic cleaning program is started, the industrial control computer 6 will open the pumping valve 9. The clean water in the clean water tank 8 enters the spraying device 10 through the pipeline. The spraying device 10 evenly sprays the clean water on the inner wall of the observation bottle 1 by means of increased spraying and flushing. The clean water will flow down along the inner wall of the observation bottle 1, taking away the dirt attached to the inner wall to achieve the purpose of cleaning. Then, the cleaned sewage flows out through the drain valve 7 and is discharged into the wastewater tank.

[0087] In some alternative embodiments, the biochemical sludge on-line monitoring device 100 further includes: a vacuum break valve 11 and a vacuum valve 12.

[0088] Among them, the vacuum breaking valve 11 is connected to the observation bottle 1; the vacuum valve 12 is connected to the vacuum breaking valve 11; the industrial computer 6 is electrically connected to the vacuum valve 12 and the vacuum breaking valve 11 respectively, and the industrial computer 6 is also used to control the vacuum valve 12 to open and the vacuum breaking valve 11 to close when the water pump 3 is in the starting state, so as to vacuum the observation bottle; and it is also used to control the vacuum breaking valve 11 to open and the vacuum breaking valve 12 to close when the drain valve 7 is in the open state, so as to change the vacuum state in the observation bottle 1 into a non-vacuum state.

[0089] Preferably, the vacuum breaking valve 11 is connected to the observation bottle 1 through a pipeline; the vacuum valve 12 is connected to the vacuum breaking valve 11 through a pipeline. It should be noted that the vacuum valve 12 can only evacuate a certain enclosed space, but cannot destroy the vacuum state. The vacuum breaking valve 11 can destroy the vacuum state.

[0090] When the industrial computer 6 controls the water pump 3 to be in the starting state, that is, during the water filling process, the vacuum valve 12 is controlled to be opened and the vacuum breaking valve 11 is closed to evacuate the observation bottle. The negative pressure formed inside the observation bottle 1 helps the liquid flow, ensuring that the wastewater in the wastewater pool 2 can be smoothly pumped into the observation bottle.

[0091] When the industrial computer 6 controls the drain valve 7 to be in an open state, that is, during the drainage process and the cleaning process, the vacuum valve 12 is controlled to be closed and the vacuum breaking valve 11 is opened to quickly release the vacuum state in the observation bottle, so that during the drainage process, the wastewater sample to be monitored in the observation bottle can be discharged smoothly, or during the cleaning process, the sewage after cleaning can be discharged smoothly.

[0092] It should be noted that after the observation bottle 1 is cleaned, in order to prevent the liquid from flowing back and affecting the next water filling, the industrial computer 6 will control the vacuum breaking valve 11 to remain open to ensure the internal pressure balance of the observation bottle 1; when waiting for the next water filling, the vacuum breaking valve 11 can be closed again.

[0093] According to an embodiment of the present invention, an embodiment of an automatic water supply control method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0094] In this embodiment, an automatic water supply control method is provided, which can be used in the above-mentioned biochemical sludge online monitoring device. Figure 2 is a flow chart of an automatic water supply control method according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0095] Step S201, obtain the time difference between the initial moment when the water pump is started and the current moment.

[0096] Step S202, obtain the visual liquid level height information of the wastewater water sample to be monitored detected by the camera at the current moment.

[0097] Step S203, obtain the actual liquid level height information of the wastewater water sample to be monitored detected by the infrared liquid level sensor at the current moment.

[0098] Step S204, determine the current state information of the wastewater water sample to be monitored according to the time difference, the visual liquid level height information and the actual liquid level height information.

[0099] Step S205, control the start or stop of the water pump according to the current state information of the wastewater water sample to be monitored, so as to automatically control the water supply to the observation bottle.

[0100] In some alternative embodiments, specifically, the above step S204 includes:

[0101] Step S2041, compare the visual liquid level height information with a first preset value to determine the first state information of the wastewater water sample to be monitored.

[0102] Step S2042, compare the actual liquid level height information with the detection position of the infrared liquid level sensor to determine the second state information of the wastewater water sample to be monitored.

[0103] Step S2043, compare the time difference with a second preset value to determine the third state information of the wastewater water sample to be monitored.

[0104] In some alternative embodiments, the first state information includes: the visual liquid level height information is greater than or equal to the first preset value, and the visual liquid level height information is less than the first preset value; the second state information includes: the actual liquid level height information is lower than the detection position of the infrared liquid level sensor, and the actual liquid level height information is higher than or equal to the detection position of the infrared liquid level sensor; the third state information includes: the time difference is greater than or equal to the second preset value, and the time difference is less than the second preset value;

[0105] After determining the current state information of the wastewater water sample to be monitored according to the time difference, the visual liquid level height information and the actual liquid level height information, the method further includes:

[0106] Encode the time difference, the visual liquid level height information and the actual liquid level height information; encode the first state information, the second state information and the third state information respectively.

[0107] It should be noted that the first preset value and the second preset value can be set according to specific circumstances and are not limited herein. The second preset value can be the time when the liquid level of the wastewater water sample to be monitored reaches the specified height.

[0108] Exemplarily, first, encode the time difference, visual liquid level height information, and actual liquid level height information to obtain a time encoding vector T l , a visual encoding vector H l , an infrared encoding vector C1, and form multimodal data;

[0109] Assume that the first preset value is H th , when encoding the first state information C H , if the visual encoding vector H l is greater than or equal to the first preset value H th , it can be encoded as 1; if the visual encoding vector H l is less than the first preset value H th , it can be encoded as 0:

[0110]

[0111] When encoding the second state information C I , assume that the infrared encoding vector C1 is lower than the detection position I of the infrared liquid level sensor l , that is, when the detection position I of the infrared liquid level sensor l is not blocked by liquid, it is encoded as 0; when the infrared encoding vector C1 is higher than or equal to the detection position I of the infrared liquid level sensor l , that is, when the detection position I of the infrared liquid level sensor l is blocked by liquid, it is encoded as 1:

[0112]

[0113] When encoding the third state information C T , assume that T th is the time when the extraction of the wastewater water sample to be monitored reaches the set height. If the time encoding vector T l is greater than or equal to the second preset value T th , it is encoded as 1; if the time encoding vector T l is less than the second preset value T th , it is encoded as 0;

[0114]

[0115] In some alternative embodiments, specifically, the above step S205 includes:

[0116] Step S2051, establish the correspondence between the current state information of the wastewater water sample to be monitored and the start or stop of the water pump.

[0117] In step S2051, the correspondence between the current state information of the wastewater sample to be monitored and the start or stop of the water pump can be understood as the logical relationship between the current state information of the wastewater sample to be monitored and the automatic water supply control. That is to say, after judging the comparison result between the visual liquid level height information and the first preset value, the comparison result between the actual liquid level height information and the detection position of the infrared liquid level sensor, and the comparison result between the time difference and the second preset value, under each comparison result, it is respectively judged whether water supply is required, that is, to control the start or stop of the water pump.

[0118] Step S2052, determine the water supply control instruction according to the correspondence and the current state information of the wastewater sample to be monitored.

[0119] In step S2052, the water supply control instruction indicates that the industrial control computer performs corresponding operations according to the defined instructions. For example, when water supply is required, that is, to execute the start operation of the water pump, then the corresponding water supply control instruction can be that the start code of the water pump is 1 (water supply), and the stop code of the pump is 0 (stop). Similarly, the open codes of the aforementioned drain valve, water pumping valve, vacuum breaker valve, and vacuum valve can all be set to 1, and the close codes can all be set to 0.

[0120] Step S2053, perform automatic water supply control on the observation bottle according to the water supply control instruction.

[0121] In some alternative embodiments, the correspondence between the current state information of the wastewater sample to be monitored and the start or stop of the water pump includes:

[0122] When the visual liquid level height information is less than the first preset value, and the actual liquid level height information is not blocked by the wastewater sample to be monitored, and the time difference is less than the second preset value, control the water pump to start;

[0123] When the visual liquid level height information is greater than the first preset value, control the water pump to stop;

[0124] When the visual liquid level height information is less than the first preset value, and the actual liquid level height information is blocked by the wastewater sample to be monitored, control the water pump to stop;

[0125] When the visual liquid level height information is less than the first preset value, and the actual liquid level height information is not blocked by the wastewater sample to be monitored, and the time difference is greater than the second preset value, control the water pump to stop.

[0126] Exemplarily, Table 1 shows the correspondence between the current state information of the wastewater sample to be monitored and the start or stop of the water pump, and the drain valve is in the normally closed state.

[0127] Table 1

[0128]

[0129] Among them, the priority of the first state information determined based on the visual coding vector is the highest. First, it is checked whether the first state information is 0. The visual coding vector is the factor with the highest priority in the entire control process. This is because the visual sensor, that is, the camera, can directly capture the actual height of the liquid level, and usually its accuracy and reliability are relatively high. Therefore, the status of the visual sensor is checked first. If the visual coding vector detects that the liquid level reaches the preset value (i.e., not 0), the water supply is immediately stopped, and there is no need to continue checking other coding vectors.

[0130] The priority of the second state information determined based on the infrared coding vector is the second. If the first state information vector is not 0, it will continue to be checked whether the second state information is 0. The infrared coding vector is checked after the visual coding vector, and its priority is the second. The infrared sensor is generally used to assist in monitoring the change of the liquid level. When the light condition is not good or the visual sensor fails, it can be used as a reliable supplement. If the second state information detects that the liquid level reaches the preset value (i.e., not 0), the water supply will be stopped.

[0131] The priority of the third state information determined based on the time coding vector is the lowest. If both the first state information and the second state information are not equal to 0, it will be checked whether the third state information is 0. The priority of the time coding vector is the lowest. It is usually used to monitor the time of the water supply operation to ensure that the water supply time does not exceed the preset safety time limit. If the other two sensors do not trigger the stop signal, and the positive or negative countdown reaches the set value, the water supply will also be stopped. This design ensures that even if the sensor fails or the detection is incorrect, there will be no overflow or other dangers caused by excessive water supply.

[0132] In summary, the on-line monitoring device for biochemical sludge and the automatic water supply control method provided by the embodiments of the present invention have the following advantages: (1) Through real-time monitoring and automatic control, each link of sludge treatment can be better controlled, avoiding the reduction of treatment efficiency caused by lagging monitoring or improper control, and ultimately improving the overall efficiency of sewage treatment. (2) By integrating visual height information, infrared liquid level sensor data and water supply time control instructions, more comprehensive and accurate liquid level information can be provided, reducing the measurement error caused by a single sensor, and enhancing the decision-making ability and environmental adaptability. (3) The autonomous water supply control realized by the intelligent algorithm can automatically adjust the water supply process according to the multi-modal data obtained in real time, reducing manual intervention, and improving the automation level and operation efficiency of the system. (4) It can quickly respond to liquid level changes, ensuring the high efficiency and stability of the water supply process, and is particularly suitable for high-load environments such as industrial wastewater treatment. (5) Through the cross-validation of multi-modal data, various interferences in complex environments can be effectively dealt with, ensuring the reliability of the system. (6) Since non-contact infrared liquid level sensors and visual sensors are used, and through multi-modal data coding decision-making and intelligent control algorithms, frequent manual maintenance and calibration are not required during operation, reducing the maintenance cost and operation risk, and enhancing the economic benefits of the overall system.

[0133] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A biochemical sludge online monitoring device, characterized in that: include: An observation bottle, used for holding a wastewater sample to be monitored, wherein the wastewater sample to be monitored contains biochemical sludge; Wastewater tank, used to hold wastewater; The wastewater contains biochemical sludge; A water pump is connected to the wastewater tank and the observation bottle respectively, and is used to pump wastewater from the wastewater tank into the observation bottle; A camera is arranged on one side of the observation bottle and is used to monitor the visual liquid level height information of the wastewater sample to be monitored in the observation bottle; The infrared liquid level sensor is arranged on the outer wall of the observation bottle and is located at the lower side of the first water extraction port away from the observation bottle, and is used to monitor the actual liquid level height information of the wastewater sample to be monitored in the observation bottle; The industrial computer is electrically connected to the water pump, the infrared liquid level sensor and the camera respectively, and is used to obtain the time difference between the initial moment of starting the water pump and the current moment. The time difference can be recorded at the timestamp of the current moment while the industrial computer obtains the visual liquid level height information and the actual liquid level height information, and is determined according to the timing time of the initial moment of starting the water pump and the timestamp of the current moment; and is used to obtain the visual liquid level height information of the wastewater sample to be monitored monitored by the camera at the current moment; and is used to obtain the actual liquid level height information of the wastewater sample to be monitored monitored by the infrared liquid level sensor at the current moment; the time difference, the visual liquid level height information and the actual liquid level height information are encoded to obtain the time encoding vector, the visual encoding vector quantity, infrared coding vector, and form multimodal data; and is used to determine the current state information of the wastewater sample to be monitored according to the multimodal data; and is used to control the start or stop of the water pump according to the current state information of the wastewater sample to be monitored, so as to automatically control the water filling of the observation bottle; the industrial computer is also used to compare the visual liquid level height information with a first preset value to determine the first state information of the wastewater sample to be monitored; and is also used to compare the actual liquid level height information with the detection position of the infrared liquid level sensor to determine the second state information of the wastewater sample to be monitored; and is also used to compare the time difference with a second preset value to determine the third state information of the wastewater sample to be monitored.

2. The device according to claim 1, characterized in that A drain valve is connected to the wastewater tank and the observation bottle respectively, and is used to discharge the wastewater sample to be monitored in the observation bottle into the wastewater tank; The camera is also used to monitor the liquid level change of the wastewater sample to be monitored in the observation bottle; The industrial computer is electrically connected to the drain valve, and is also used to control the drain valve to open after monitoring the wastewater sample to be monitored in the observation bottle, so as to discharge the wastewater sample to be monitored in the observation bottle into the wastewater pool; and is also used to control the drain valve to close when the liquid level of the wastewater sample to be monitored in the observation bottle drops to a third preset value; and is also used to control the drain valve to be in a normally closed state when automatically filling the observation bottle with water.

3. The device according to claim 2, characterized in that The device also includes: Clean water tank, used to hold clean water; A pumping valve is connected to the clean water tank and the observation bottle respectively, and is used to pump clean water from the clean water tank into the observation bottle; A spraying device, which is connected to the water pumping valve and is arranged at the second water pumping port of the observation bottle, and is used to spray clean water on the inner wall of the observation bottle; The industrial computer is electrically connected to the pumping valve. The industrial computer is also used to control the pumping valve and the drain valve to open after the observation bottle is cleaned, so as to clean the inner wall of the observation bottle and discharge the cleaned waste water into the wastewater pool.

4. The device according to claim 1, characterized in that The device also includes: A vacuum breaking valve connected to the observation bottle; A vacuum valve, connected to the vacuum breaking valve; The industrial computer is electrically connected to the vacuum valve and the vacuum breaking valve respectively. The industrial computer is also used to control the vacuum valve and the vacuum breaking valve to open when the water pump is in the starting state, so as to evacuate the observation bottle; and is also used to control the vacuum breaking valve to open when the drain valve is in the opening state, so as to change the vacuum state in the observation bottle into a non-vacuum state.

5. An automatic water supply control method, characterized in that: The biochemical sludge online monitoring device applied to any one of claims 1 to 4, the method comprising: Obtain the time difference between the initial moment of starting the water pump and the current moment. The time difference can be recorded at the current moment while the industrial computer obtains the visual liquid level height information and the actual liquid level height information, and is determined based on the timing time of the initial moment of starting the water pump and the current moment's timestamp; Obtain visual liquid level height information of the wastewater sample to be monitored monitored by the camera at the current moment; Obtain the actual liquid level height information of the wastewater sample to be monitored monitored by the infrared liquid level sensor at the current moment; Determine the current state information of the wastewater sample to be monitored according to the time difference, the visual liquid level height information and the actual liquid level height information, including: comparing the visual liquid level height information with a first preset value to determine the first state information of the wastewater sample to be monitored; comparing the actual liquid level height information with the detection position of the infrared liquid level sensor to determine the second state information of the wastewater sample to be monitored; comparing the time difference with the second preset value to determine the third state information of the wastewater sample to be monitored; Encode the time difference, visual liquid level height information and actual liquid level height information to obtain a time encoding vector, a visual encoding vector, an infrared encoding vector, and form multimodal data; According to the current status information of the wastewater sample to be monitored, the water pump is controlled to start or stop, so as to automatically control the water filling of the observation bottle.

6. The method according to claim 5, characterized in that The first state information includes: the visual liquid level height information is greater than or equal to the first preset value, and the visual liquid level height information is less than the first preset value; the second state information includes: the actual liquid level height information is lower than the detection position of the infrared liquid level sensor, and the actual liquid level height information is higher than or equal to the detection position of the infrared liquid level sensor; the third state information includes: the time difference is greater than or equal to the second preset value, and the time difference is less than the second preset value; After determining the current state information of the wastewater sample to be monitored according to the time difference, the visual liquid level height information and the actual liquid level height information, the method further includes: The time difference, the visual liquid level height information and the actual liquid level height information are encoded; and the first state information, the second state information and the third state information are encoded respectively.

7. The method according to claim 6, characterized in that The method controls the start or stop of the water pump according to the current state information of the wastewater sample to be monitored, so as to automatically control the water supply to the observation bottle; comprising: Establishing a corresponding relationship between the current state information of the wastewater sample to be monitored and the start or stop of the water pump; Determining a water supply control instruction according to the corresponding relationship and the current state information of the wastewater sample to be monitored; According to the water supply control instruction, the observation bottle is automatically supplied with water.

8. The method according to claim 6, characterized in that The corresponding relationship between the current state information of the wastewater sample to be monitored and the start or stop of the water pump includes: When the visual liquid level height information is less than a first preset value, and the actual liquid level height information is lower than the detection position of the infrared liquid level sensor, and the time difference is less than a second preset value, the water pump is controlled to start; When the visual liquid level height information is greater than a first preset value, the water pump is controlled to stop; When the visual liquid level height information is less than a first preset value and the actual liquid level height information is equal to the detection position of the infrared liquid level sensor, the water pump is controlled to stop; When the visual liquid level height information is less than a first preset value, the actual liquid level height information is not blocked by the wastewater sample to be monitored, and the time difference is greater than a second preset value, the water pump is controlled to stop.

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