Biochemical sludge on-line monitoring device and automatic water feeding control method

Abstract

The invention relates to the technical field of biochemical sludge monitoring and control, and discloses a biochemical sludge online monitoring device and an automatic water feeding control method. The method comprises the steps that the time difference between the initial moment and the current moment when the water suction pump is started is obtained; acquiring visual liquid level height information of the to-be-monitored wastewater sample monitored by the camera at the current moment; acquiring actual liquid level height information of the to-be-monitored wastewater sample monitored by the infrared liquid level sensor at the current moment; determining 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; according to the current state information of the to-be-monitored wastewater sample, the water suction pump is controlled to be started or stopped so as to perform automatic water feeding control on the observation bottle. According to multi-modal data, real-time monitoring and automatic water feeding control are carried out on the observation bottle, the automatic control efficiency and precision of biochemical sludge online monitoring are improved, and then the water treatment effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of biochemical sludge monitoring and control, and in particular to an online biochemical sludge monitoring device and an automatic water supply control method. Background Art

[0002] With the continuous advancement of urbanization and industrialization, increasingly stringent environmental protection policies, and the improvement of public environmental awareness, the monitoring and control of biochemical sludge has become a vital part of sewage treatment, among which water supply control technology is an important link that affects the monitoring results of biochemical sludge and the effect of sewage treatment.

[0003] In the related technology, biochemical sludge monitoring relies on regular sampling and laboratory analysis. Not only does sampling take a long time, but it may also change during the transportation or storage of samples, which may lead to inaccurate subsequent monitoring data. In addition, laboratory analysis will also have problems such as manual operation errors, complex analytical instruments, and high costs. At the same time, water supply control is mostly achieved with the help of sensors such as float switches, pressure sensors, ultrasonic level gauges, capacitive level sensors, and visual sensors. However, the method of using the above-mentioned single type of sensor for water supply control has the following shortcomings: First, it is easily affected by external factors, resulting in reduced sensor accuracy; second, in a complex industrial environment, the sensor is prone to malfunction or failure, which is not only difficult to maintain, but also causes deviations in water supply control; third, in a rapidly changing water treatment environment, liquid level fluctuations may exceed the response time of the control system, resulting in overload or underload of the water supply control system in a short period of time, affecting the subsequent water treatment effect; fifth, the water supply control process requires manual intervention and has low operating efficiency. Summary of the invention

[0004] In view of this, the present invention provides a biochemical sludge online monitoring device and an automatic water supply control method to solve one or more technical problems to be solved in the related art.

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

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

[0007] A wastewater pool, used to hold wastewater; the wastewater contains biochemical sludge;

[0008] 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;

[0009] 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;

[0010] 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 inlet 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] 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; and to obtain the visual liquid level height information of the wastewater sample to be monitored monitored by the camera at the current moment; and 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 to determine the current state information of the wastewater sample to be monitored based on the time difference, the visual liquid level height information and the actual liquid level height information; and to control the start or stop of the water pump based on the current state information of the wastewater sample to be monitored, so as to automatically control the water filling of the observation bottle.

[0012] The embodiment of the present invention provides an online monitoring device for biochemical sludge. Through real-time online monitoring of biochemical sludge in an observation bottle and automatic water supply control, each link of sludge treatment can be better mastered to avoid the problem of water treatment decline caused by delayed monitoring or improper control; more comprehensive and accurate liquid level information is provided by fusing visual liquid level height information, infrared liquid level sensor data and time difference, and measurement errors of a single sensor are avoided through cross-validation of multimodal data, and various interferences in complex environments can be effectively dealt with, thereby ensuring the reliability of the system; the water supply process is automatically adjusted according to the current state information determined by the multimodal data acquired in real time, thereby reducing manual intervention and improving the automation level and operation efficiency of the system; the device can quickly respond to changes in liquid level to 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, i.e., cameras and infrared liquid level sensors, are used, and state information analysis and control instruction execution of multimodal data are performed with the help of an industrial computer, frequent manual maintenance and calibration are not required during operation, thereby reducing maintenance costs and operation risks and improving the economic benefits of the overall system.

[0013] In some optional embodiments, 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.

[0014] In some optional embodiments, the 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;

[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 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.

[0017] In some optional embodiments, the device further comprises:

[0018] Clean water tank, used to hold clean water;

[0019] 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;

[0020] 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;

[0021] 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.

[0022] In some optional embodiments, the device further comprises:

[0023] A vacuum breaking valve connected to the observation bottle;

[0024] A vacuum valve, connected to the vacuum breaking valve;

[0025] 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.

[0026] In a second aspect, the present invention further provides an automatic water supply control method, which is applied to an online monitoring device for biochemical sludge, and the method comprises:

[0027] Get the time difference between the initial time of starting the water pump and the current time;

[0028] Obtain 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 sample to be monitored monitored by the infrared liquid level sensor at the current moment;

[0030] 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;

[0031] 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.

[0032] In some optional implementations, determining the current state information of the wastewater sample to be monitored based on the time difference, the visual liquid level height information and the actual liquid level height information includes:

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

[0034] 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;

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

[0036] In some optional 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 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] 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.

[0039] In some optional embodiments, the method of controlling the start or stop of a water pump according to the current state information of the wastewater sample to be monitored to automatically control the water supply to the observation bottle includes:

[0040] 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;

[0041] Determining a water supply control instruction according to the corresponding relationship and the current state information of the wastewater sample to be monitored;

[0042] According to the water supply control instruction, the observation bottle is automatically supplied with water.

[0043] In some optional implementations, 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:

[0044] 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;

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

[0046] 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;

[0047] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

[0051] Description of reference numerals:

[0052] 100. Biochemical sludge online monitoring device; 1. Observation bottle; 101. First water pumping port; 102. Second water pumping port; 103. First drainage port; 2. Wastewater tank; 3. Water pump; 4. Camera; 5. Infrared liquid level sensor; 6. Industrial computer; 7. Drain valve; 8. Clean water tank; 9. Water pumping valve; 10. Spraying device; 11. Vacuum breaking valve; 12. Vacuum valve. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection 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 need more efficient and accurate monitoring and control methods to ensure that the effluent quality meets the national emission standards. With the increasingly stringent environmental protection policies and the improvement of public environmental awareness, sludge treatment is no longer just a simple solid-liquid separation, but more involves online monitoring and process control of biochemical reactions in sludge.

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

[0056] The core of biochemical sludge formation lies in the efficiency of microbial degradation of organic matter, which directly affects the effluent quality. Therefore, it is an important measure to ensure the stable operation of the sewage treatment process to obtain the parameter data of biochemical reactions in sludge (such as mud-water level, sedimentation ratio, component concentration and reaction rate of water samples in sludge) in real time and online, and to adjust the sludge treatment process in time.

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

[0058] In the related technologies, most of them use single-type sensors such as float switches, pressure sensors, ultrasonic level gauges, capacitive level sensors, and visual sensors to achieve water supply control. Specifically, (1) Float switch: The switch is controlled by the rise and fall of the float to achieve automatic liquid level control, but the sensitivity and accuracy of its liquid level control are low, and it is easily affected by liquid viscosity, impurities, and container shape, resulting in unstable liquid level control. In addition, the float switch is prone to mechanical failure in complex environments and is difficult to maintain. (2) Pressure sensor: The liquid level is calculated by detecting the pressure generated by the liquid at the bottom of the container, but the measurement result is easily affected by changes in liquid density and temperature, and it is easy to fail in high temperature and high pressure environments. In addition, the installation and maintenance of the sensor itself are relatively complicated and costly. (3) Ultrasonic level meter: The liquid level is determined by emitting ultrasonic waves and receiving their reflected waves on the liquid surface, and calculating the sound wave propagation time, but it is easily affected by factors such as ambient temperature, bubbles, and agitated liquid, 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 by measuring the change in the dielectric constant of the liquid, but is easily affected by changes in the liquid's conductivity and temperature, and has high installation requirements. In addition, the measurement results are easily distorted in liquids containing a large amount of impurities or foam. (5) Visual sensor: collects liquid level images through a camera and uses image processing algorithms to detect the position of the liquid surface. It is easily affected by light conditions, liquid color and transparency.

[0059] In summary, the use of a single sensor for water supply control has many shortcomings: first, it is easily affected by external factors, resulting in reduced sensor accuracy; second, in a complex industrial environment, the sensor is prone to malfunction or failure, which is not only difficult to maintain, but also causes deviations in water supply control; third, in a rapidly changing water treatment environment, liquid level fluctuations may exceed the response time of the control system, resulting in overload or underload of the water supply control system in a short period of time, affecting the subsequent water treatment effect; fifth, the water supply control process requires manual intervention and has low operating efficiency.

[0060] Based on this, according to an embodiment of the present invention, a biochemical sludge online monitoring device is provided, which is applied to application environments such as urban sewage treatment plants, industrial wastewater treatment, laboratory sludge treatment research, and environmental monitoring water treatment. Figure 1 FIG. 2 shows a schematic diagram of the structure of the biochemical sludge online monitoring device according to an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a biochemical sludge online monitoring device 100, including: an observation bottle 1, a wastewater pool 2, a water pump 3, a camera 4, an infrared liquid level sensor 5 and an industrial 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 pump 3 is connected to the wastewater tank 2 and the observation bottle 1 respectively, and the pump 3 is used to extract 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 at the lower side of the first water pumping port 101 away 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 computer 5 The industrial computer 5 is electrically connected to the water pump 3, the infrared liquid level sensor 5 and the camera 4 respectively. The industrial computer 5 is used to obtain the time difference between the initial moment of starting the water pump 3 and the current moment, and to obtain the visual liquid level height information of the wastewater sample to be monitored by the camera 4 at the current moment; and to obtain the actual liquid level height information of the wastewater sample to be monitored by the infrared liquid level sensor 5 at the current moment; and 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 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 automatically control the water filling of the observation bottle 1.

[0062] The pump 3 is connected to the wastewater pool 2 and the observation bottle 1 respectively. Preferably, the pump 3 is connected to the wastewater pool 2 and the observation bottle 1 respectively through pipes, one end of the pump is directly inserted into the wastewater pool 2 through the pipe, and the other end is connected to the first water inlet 101 of the observation bottle 1 through the pipe. The observation bottle 1 and the wastewater pool 2 both contain wastewater containing biochemical sludge. When the pump 3 is in the starting state, the wastewater in the wastewater pool 2 can be used as a supply for 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 edge information of the wastewater sample to be monitored in the observation bottle 1, and then 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 transmitting 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 transmitting tube is refracted by the lens and directly irradiated onto the receiving tube. After receiving the light, the receiving tube will generate a corresponding high-level signal; 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 no signal, so the industrial 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 at the lower side of the first water pumping port 301 away from the observation bottle 1 to prevent the wastewater flowing out of the first water pumping port 301 from interfering with the actual liquid level height information monitored by the infrared liquid level sensor 5 when the water pump 3 extracts the wastewater from the wastewater pool 2 into the observation bottle 1.

[0065] It should be noted that before the biochemical sludge online monitoring device 100 starts to operate, the camera 4 can be set with white balance, focal length, exposure, etc. to ensure that the acquired 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 actual liquid level height information 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 settings can be set according to actual needs and are not limited here.

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

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

[0068] Exemplarily, when the biochemical sludge online monitoring device 100 starts running, the water pump 3, the camera 4, the infrared liquid level sensor 5 and the industrial 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, 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, and the industrial computer 6 starts timing from the initial moment when the water pump 3 is started.

[0069] When it is necessary to automatically control the water supply to the observation bottle 1, the industrial computer 6 obtains the visual liquid level height information of the wastewater sample to be monitored monitored by the camera 4 at the current moment, and 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 obtains the time difference from the initial moment to the current moment when the water pump 3 is started. Among them, the time difference can be recorded at the current moment when the industrial computer 6 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 when the water pump 3 is started and the timestamp of the current moment. The acquisition of the time difference can ensure the synchronization of the collected information of the camera 4, the infrared liquid level sensor 5 and the industrial computer 6. At the same time, the collected information of the above three together constitutes multimodal data.

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

[0071] Then, the industrial computer 6 determines the current status information of the wastewater sample to be monitored based on the acquired multimodal data; and based on the current status information of the wastewater sample to be monitored, it can be judged whether it is necessary to fill the observation bottle 1 with water at the current moment. If it is necessary to continue filling with water, the industrial computer 6 controls the water pump 3 to keep it started; when it is necessary to stop filling with water, the industrial computer 6 controls the water pump 3 to stop, so as to realize automatic water filling control of the observation bottle 1.

[0072] The embodiment of the present invention provides an online monitoring device for biochemical sludge. Through real-time online monitoring of biochemical sludge in an observation bottle and automatic water supply control, each link of sludge treatment can be better mastered to avoid the problem of water treatment decline caused by delayed monitoring or improper control; more comprehensive and accurate liquid level information is provided by fusing visual liquid level height information, infrared liquid level sensor data and time difference, and measurement errors of a single sensor are avoided through cross-validation of multimodal data, and various interferences in complex environments can be effectively dealt with, thereby ensuring the reliability of the system; the water supply process is automatically adjusted according to the current state information determined by the multimodal data acquired in real time, thereby reducing manual intervention and improving the automation level and operation efficiency of the system; the device can quickly respond to changes in liquid level to 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, i.e., cameras and infrared liquid level sensors, are used, and state information analysis and control instruction execution of multimodal data are performed with the help of an industrial computer, frequent manual maintenance and calibration are not required during operation, thereby reducing maintenance costs and operation risks and improving the economic benefits of the overall system.

[0073] In some optional embodiments, the industrial computer 6 is also used to compare the visual liquid level height information with the first preset value to determine the first state information of the wastewater sample to be monitored; and is also used to determine the second state information of the wastewater sample to be monitored based on the actual liquid level height information; and is also used to compare the time difference with the second preset value to determine the third state information of the wastewater sample to be monitored.

[0074] Among them, it can be known from the above that the actual liquid level height information of the wastewater sample to be monitored in the observation bottle 1 can be converted into a level signal, and the relationship with the detection position of the infrared liquid level sensor 5 can be judged according to the level signal. 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 level 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, the embodiment of the present invention uses the working principle of the infrared liquid level sensor 5 to judge whether the liquid is blocked, and then determines whether the liquid level of the wastewater sample to be monitored reaches the detection position of the infrared liquid level sensor 5, and uses it as the second state information.

[0075] In some optional embodiments, the biochemical sludge online monitoring device 100 further includes: a drain valve 7 .

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

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

[0078] The industrial computer 6 is electrically connected to the drain valve 7. The industrial computer 6 is also used 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, so as to discharge the wastewater sample to be monitored in the observation bottle 1 into the wastewater pool 2; and is also used 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 also used to control the drain valve 7 to be in a normally closed state when the observation bottle 1 is automatically filled with water.

[0079] The drain valve 7 is respectively connected to the wastewater pool 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 pool 2 through a pipeline.

[0080] After the monitoring of the wastewater sample to be monitored in the observation bottle 1 is completed, the industrial computer 6 will open the drain valve 7, and the wastewater sample to be monitored in the observation bottle 1 will be discharged from the observation bottle 1 into the wastewater pool 2. At the same time, the industrial computer 6 also needs to observe the change of the liquid level monitored by the camera 4, and 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 computer 6 can also control the drain valve 7 to be in a normally closed state during the process of automatically controlling the water supply to the observation bottle 1 .

[0083] In some optional implementations, the biochemical sludge online 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 connected to the clean water tank 8 and the observation bottle 1 respectively, and the pumping valve 9 is used to pump the clean water from 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 pumping port 102 of the observation bottle, and 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, and the industrial control computer 6 is also used to control the pumping valve 9 and the drain valve 7 to open after the observation bottle 1 is cleaned, so as to clean the inner wall of the observation bottle 1 and discharge the cleaned waste water into the wastewater tank 2.

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

[0086] When it is necessary to clean the observation bottle 1, that is, start the automatic cleaning program, the industrial computer 6 will open the pumping valve 9, and the clean water in the clean water tank 8 will enter the spray device 10 through the pipeline. The spray device 10 will spray the clean water evenly on the inner wall of the observation bottle 1 by adding spraying, flushing, etc. The clean water will flow down along the inner wall of the observation bottle 1, taking away the dirt attached to the inner wall, so as 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 optional implementations, the biochemical sludge online monitoring device 100 further includes: a vacuum breaking 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, obtaining the time difference between the initial time of starting the water pump and the current time.

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

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

[0098] Step S204, determining the current status 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.

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

[0100] In some optional implementations, specifically, the above step S204 includes:

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

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

[0104] In some optional 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 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] The time difference, visual liquid level height information and actual liquid level height information are encoded; the first state information, the second state information and the third state information are encoded 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 here. The second preset value can be the time when the liquid level of the wastewater sample to be monitored reaches a specified height.

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

[0109] Assume that the first preset value is H th , for the first state information C H When encoding, the visual encoding vector H l Greater than or equal to the first preset value H th It can be encoded as 1, visual encoding vector H l Less than the first preset value H th Can be encoded as 0:

[0110]

[0111] The second status information C I When encoding, it is assumed that the infrared encoding vector C1 is lower than the detection position I of the infrared liquid level sensor. l , that is, the detection position I of the infrared liquid level sensor l When it is not blocked by liquid, the code is 0, and the infrared coding vector C1 is higher than or equal to the detection position I of the infrared liquid level sensor. l , that is, the detection position I of the infrared liquid level sensor l When blocked by liquid, it is coded as 1:

[0112]

[0113] The third state information C T When encoding, assume that T th is the time when the wastewater sample to be monitored reaches the set height, and the time encoding vector T l Greater than or equal to the second preset value T th The time code is 1, the time code vector T l Less than the second preset value T th When the code is 0;

[0114]

[0115] In some optional implementations, specifically, the above step S205 includes:

[0116] Step S2051, establishing a corresponding relationship between the current status information of the wastewater sample to be monitored and the start or stop of the water pump.

[0117] In step S2051, the corresponding relationship 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 determining 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 determined whether water supply is required, that is, the start or stop of the water pump is controlled.

[0118] Step S2052, determining the water supply control instruction according to the corresponding relationship and the current status information of the wastewater sample to be monitored.

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

[0120] Step S2053, automatically controlling the water supply to the observation bottle according to the water supply control instruction.

[0121] In some optional implementations, 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:

[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, the water pump is controlled to start;

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

[0125] When the visual liquid level height information is less than the 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 the second preset value, the water pump is controlled to stop.

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

[0127] Table 1

[0128]

[0129] Among them, the first state information determined based on the visual coding vector has the highest priority, and the first state information is checked first to see if it is 0. The visual coding vector is the highest priority factor 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 has high accuracy and reliability. Therefore, the visual sensor state is checked first; if the visual coding vector detects that the liquid level has reached the preset value (that is, not 0), the water supply is stopped immediately without continuing to check other coding vectors;

[0130] The second state information determined based on the infrared coding vector has the second highest priority. If the first state information vector is not 0, the second state information will continue to be checked to see if it is 0. The infrared coding vector is checked after the visual coding vector and has the second highest priority. Infrared sensors are generally used to assist in monitoring liquid level changes and can serve as a reliable supplement when lighting conditions are poor or the visual sensor fails. If the second state information detects that the liquid level has reached a preset value (i.e., not 0), water filling will be stopped.

[0131] The third state information determined based on the time coding vector has the lowest priority. If both the first state information and the second state information are not equal to 0, the third state information will be checked to see if it is 0. The time coding vector has the lowest priority and is usually used to monitor the time of the water filling operation to ensure that the water filling time does not exceed the preset safety time limit; if the other two sensors do not trigger the stop signal, and the countdown or countdown reaches the set value, the water filling will also stop; this design ensures that even if the sensor fails or the detection fails, it will not cause overflow or other dangers due to excessive water filling.

[0132] In summary, the biochemical sludge online monitoring device and 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 to avoid the decline in treatment efficiency caused by monitoring lag or improper control, and ultimately improve the overall efficiency of sewage treatment. (2) By integrating visual height information, infrared liquid level sensor data and water supply time control instructions, it can provide more comprehensive and accurate liquid level information, reduce the measurement error caused by a single sensor, and enhance decision-making ability and environmental adaptability. (3) Autonomous water supply control through intelligent algorithms can automatically adjust the water supply process according to multimodal data acquired in real time, reduce manual intervention, and improve the automation level and operation efficiency of the system. (4) It can quickly respond to liquid level changes to ensure the efficiency and stability of the water supply process, which is particularly suitable for high-load environments such as industrial wastewater treatment. (5) Through cross-validation of multimodal data, it can effectively cope with various interferences in complex environments and ensure the reliability of the system. (6) Due to the use of non-contact infrared liquid level sensors and visual sensors, and through multimodal data encoding decisions and intelligent control algorithms, frequent manual maintenance and calibration are not required during operation, which reduces maintenance costs and operational risks and improves 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 may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all 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; and to obtain the visual liquid level height information of the wastewater sample to be monitored monitored by the camera at the current moment; and 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 to determine the current state information of the wastewater sample to be monitored based on the time difference, the visual liquid level height information and the actual liquid level height information; and to control the start or stop of the water pump based on the current state information of the wastewater sample to be monitored, so as to automatically control the water filling of the observation bottle.

2. The device according to claim 1, characterized in that 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.

3. The device according to claim 1 or 2, 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.

4. The device according to claim 3, 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.

5. 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.

6. An automatic water supply control method, characterized in that: The biochemical sludge online monitoring device applied to any one of claims 1 to 5, the method comprising: Get the time difference between the initial time of starting the water pump and the current time; 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; 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.

7. The method according to claim 6, characterized in that 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 includes: Comparing the visual liquid level height information with a first preset value to determine 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; The time difference is compared with a second preset value to determine third state information of the wastewater sample to be monitored.

8. The method according to claim 7, 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.

9. The method according to claim 8, 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.

10. The method according to claim 8, 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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