Improved bubble type water level measuring instrument

Abstract

The invention relates to the technical field of water level measurement, and discloses an improved bubble type water level measuring instrument which comprises a measuring air pipe, a pressure balancer is arranged at an input port of the measuring air pipe, an air source circulation module is arranged on the outer side of the pressure balancer, and a measuring sensor is fixedly connected to the outer side of the pressure balancer. An intelligent controller is arranged on the outer side of the measuring sensor, and an environment compensation module is fixedly connected to the outer side of the measuring air pipe. According to the improved bubble type water level measuring instrument, the fluctuation amplitude of a pressure signal can be reduced in complicated environments such as turbulent flow, moisture possibly mixed in a pipeline can also be removed in a high-humidity environment, the measuring stability in the complicated environments is improved, the measuring adaptability of the system in the complicated environments is effectively improved through the environment compensation module, and the measuring accuracy is improved. The core of the method is that the environmental parameter change is quantified into an executable compensation action, so that the measurement result is more accurate and reliable, and the measurement error caused by environmental factors is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water level measurement, and particularly to an improved bubble type water level measuring instrument. Background Art

[0002] A bubble type water level measuring instrument is a device that realizes water level measurement based on the principle of gas pressure transmission. It has advantages such as flexible installation, strong anti-interference ability, and adaptability to complex environments, and is widely used in fields such as water conservancy projects, hydrological monitoring, and environmental protection monitoring.

[0003] The bubble type water level measuring instrument with the patent publication number CN101413819A includes a measuring air pipe, a pressure balancer, a measuring air source, a measuring sensor, and an intelligent controller. One end of the measuring air pipe is in contact with water, and the other end is connected to the pressure balancer. The measuring air source is respectively communicated with the pressure sensor of the pressure balancer and the measuring air pipe inserted underwater. The measuring sensor is connected to the pressure balancer, and the intelligent controller is connected to the measuring sensor. The present invention is suitable for the acquisition and transmission of water level data, and can realize on-site parameter correction and setting, and communication selection. There is no need to build a water level well, and it is widely applicable to various terrains and climatic conditions, with the characteristics of convenient installation and maintenance, flexible operation and networking, stable and reliable operation, and high accuracy.

[0004] However, the above device still has the following deficiencies in actual use: large gas consumption, continuous gas supply is required to maintain pressure balance, resulting in frequent replacement of the gas source. Summary of the Invention

[0005] The purpose of the present invention is to provide an improved bubble type water level measuring instrument to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solution: an improved bubble type water level measuring instrument, including a measuring air pipe, a pressure balancer is arranged at the input port of the measuring air pipe, a gas source circulation module is arranged outside the pressure balancer, a measuring sensor is fixedly connected to the outside of the pressure balancer, an intelligent controller is arranged outside the measuring sensor, and an environmental compensation module is fixedly connected to the outside of the measuring air pipe; A flow valve is fixedly connected to the input port of the measuring air pipe, the flow valve is fixedly connected to the output port of the pressure balancer, the flow valve adopts a piezoelectric micro flow valve, the flow valve is electrically connected to the intelligent controller, and the intelligent controller monitors the pressure change rate in the measuring air pipe in real time and dynamically adjusts the gas flow of the flow valve according to this rate.

[0007] Preferably, the pressure balancer includes a pressure vessel, the pressure vessel adopts a double-layer cavity structure, the double-layer cavity structure includes an outer cavity and an inner cavity, and the outer cavity is provided with an elastic silica gel diaphragm, which is made of an elastic material and is used to absorb impacts.

[0008] Preferably, the inner cavity is filled with a ceramic material, and a plurality of pores are formed in the ceramic material. The outer surface of the inner cavity is fixedly connected to the outer cavity for buffering gas in the pores.

[0009] Preferably, the gas source circulation module includes an oil-free air compressor. A one-way valve is fixedly connected to the output port of the oil-free air compressor, and the output port of the one-way valve is fixedly connected to a pressure balancer.

[0010] Preferably, the oil-free air compressor is a micro oil-free diaphragm air compressor. A condensation recovery device is fixedly connected to the outside of the pressure balancer, and the condensation recovery device is installed with the oil-free air compressor.

[0011] Preferably, the condensation recovery device includes a humidity sensor. The humidity sensor is electrically connected to an intelligent controller, and the intelligent controller is electrically connected to the condensation recovery device. The condensation recovery device is a cyclone separation type condensation recovery device for treating condensed water by air flow centrifugation.

[0012] Preferably, the environment compensation module includes a mounting block. The inside of the mounting block is fixedly connected to the outside of a measuring air pipe. Two mounting grooves are formed in the outer surface of the mounting block. A temperature sensor is installed in one of the mounting grooves, and a turbidity sensor is installed in the other mounting groove.

[0013] Preferably, the temperature sensor is a PT100 platinum resistance. The temperature sensor is electrically connected to an intelligent controller. When the temperature change rate exceeds ±0.5 °C / min and the absolute temperature exceeds 5 °C to 40 °C, correction is triggered.

[0014] Preferably, the turbidity sensor is an infrared scattering type turbidity sensor. The turbidity sensor is electrically connected to an intelligent controller. When the water quality turbidity exceeds 50 NTU and the turbidity change rate exceeds ±10 NTU / min, correction is triggered.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: First, in the present invention, the intelligent controller, measurement sensor, measurement air pipe, and pressure balancer are prior arts, which are from the bubble-type water level measuring instrument with the patent publication number CN101413819A. A piezoelectric micro-flow valve is added at the inlet position of the measurement air pipe and connected to the intelligent controller. The intelligent controller monitors the pressure change rate in the measurement air pipe in real time and dynamically adjusts the gas flow rate of the piezoelectric micro-flow valve according to this rate. In the initial operation stage of the system, a high-frequency gas supply mode is adopted to accelerate the discharge of residual moisture in the measurement air pipe; when the pressure approaches the equilibrium state, it automatically switches to a low-frequency pulsed gas supply mode. On the premise of meeting the measurement requirements, the gas consumption is minimized, the gas usage strategy and recycling mechanism are optimized, the gas consumption is reduced, and thus the overall service life of the gas source is effectively extended, and the frequency and cost of gas source replacement or replenishment are reduced. Among them, the pressure balancer transforms the structure of the original pressure vessel and designs it as a double-layer cavity structure. The inner cavity is filled with porous ceramic materials, and the porous structure of the porous ceramics is used to achieve slow gas diffusion and buffering, effectively reducing the gas flow rate and pressure change rate; an elastic silicone diaphragm is arranged in the outer cavity. Among them, the porous ceramic material is alumina ceramic, with a porosity of 40% - 60%, an average pore diameter of 50 - 100 μm, and a gas diffusion coefficient of 0.1 - 0.3 cm² / s, having the characteristics of high temperature resistance and relatively high mechanical strength, avoiding damage to itself as the buffering main body. The elastic silicone diaphragm in the outer cavity is made of fluorosilicone rubber, with a Shore hardness of 40A, a tensile strength ≥ 8 MPa, and an elongation at break ≥ 300%, having high sealing performance and temperature resistance, capable of reducing the leakage rate while avoiding aging caused by temperature. When the system is impacted by instantaneous pressure fluctuations, the elastic silicone diaphragm can undergo elastic deformation, absorb and buffer these instantaneous pressure fluctuations, make the pressure signal more stable, and can reduce the fluctuation amplitude of the pressure signal in complex environments such as turbulence, improving the stability and accuracy of pressure measurement.

[0016] Second, in the present invention, the air source circulation module abandons the traditional gas storage tank and uses a micro oil-free air compressor as the core component for gas supply. In combination with a one-way valve and a condensation recovery device, an air source self-circulation system is constructed. The micro oil-free air compressor continuously generates gas, replacing the storage-release mode of the traditional gas storage tank. The one-way valve ensures the unidirectional flow of gas, ensuring that the gas can only flow from the oil-free air compressor to the other end, preventing backflow impact or pressure fluctuations from affecting the system stability. The condensation recovery device recovers and processes the condensate generated in the system, and at the same time purifies the gas to a certain extent, enabling the gas to be recycled. Among them, the humidity sensor is used to detect the humidity in the pipeline. When the humidity is low, the condensation recovery device is not enabled. When the humidity is high, the data is transmitted to the intelligent controller, and the intelligent controller turns on the condensation recovery device. Through the application of this air source circulation module, the air source replenishment cycle is greatly extended. In high-humidity environments, such as rainy days and reservoirs, the moisture that may be mixed into the pipeline can also be removed, improving the measurement stability in complex environments, reducing the dependence on manual loading and unloading, and enhancing independence and sustainability.

[0017] Thirdly, in the present invention, a temperature sensor and a turbidity sensor are integrated at the end of the measurement trachea to form an environmental compensation sensor group. The temperature sensor monitors the temperature changes in the measurement environment in real time, and the turbidity sensor is used to detect the turbidity of the water quality. The intelligent controller receives the data transmitted by the sensors and corrects and compensates the pressure value according to these data. When the temperature change rate exceeds ±0.5°C / min or the absolute temperature exceeds 5°C to 40°C, it means that the temperature is in an abnormal environment, and the measured pressure value is corrected in real time. When the temperature rises, the gas density will also decrease. The intelligent controller automatically adjusts the pressure value upward by the corresponding airtight decrease value through correction to eliminate the density change error. According to different temperatures, the bubble release frequency is increased at low temperatures <10° to compensate for the measurement delay caused by the increase in gas solubility, and the frequency is reduced at high temperatures >35° to avoid too fast bubble rupture interfering with the measurement. When the water quality turbidity exceeds 50 NTU or the turbidity change rate exceeds ±10 NTU / min, it means that the water quality will affect the bubble morphology. At mild turbidity, 50 - 100 NTU, the bubble frequency is increased to avoid impurities adhering to the inner wall of the measurement trachea. At severe turbidity >100 NTU, it is regarded as the measurement trachea being blocked, and a large amount of gas is automatically used to backflush the trachea to try to remove the blockage. When the severe turbidity >100 NTU lasts for half an hour, the intelligent controller warns the staff, reminding the staff to come and deal with it as soon as possible. When the temperature and turbidity are abnormal at the same time, such as a sudden drop in water temperature and a sharp increase in turbidity caused by heavy rain, the intelligent controller preferentially processes the turbidity compensation because the risk of impurity blockage is higher, and then superimposes the temperature compensation, that is, first changes the bubble frequency, and then corrects the pressure value based on the current temperature compensation. This environmental compensation module effectively improves the measurement adaptability of the system in complex environments, makes the measurement results more accurate and reliable, and reduces the measurement errors caused by environmental factors. Its core lies in quantifying the changes in environmental parameters into executable compensation actions and being able to timely remind the staff in case of emergencies. Description of the Drawings

[0018] Figure 1 is a three-dimensional overall structure schematic diagram of the present invention; Figure 2 is a three-dimensional partial structure schematic diagram of the present invention; Figure 3 is a partial disassembly schematic diagram of the structure of the present invention; Figure 4 is a schematic diagram of the air source circulation module of the structure of the present invention; Figure 5 is a schematic diagram of the environmental compensation module of the structure of the present invention; Figure 6 is a schematic diagram of the working process of the structure of the present invention.

[0019] Legend Explanation: 1. Measuring trachea; 101. Flow valve; 2. Pressure balancer; 201. Outer cavity; 202. Inner cavity; 3. Air source circulation module; 301. Oil-free air compressor; 302. Check valve; 303. Condensation recovery device; 4. Measuring sensor; 5. Intelligent controller; 6. Environmental compensation module; 601. Mounting block; 602. Temperature sensor; 603. Turbidity sensor. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1 As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 shown, the present invention provides a technical solution: an improved bubble-type water level measuring instrument, including a measuring trachea 1, a pressure balancer 2 is arranged at the input port of the measuring trachea 1, an air source circulation module 3 is arranged outside the pressure balancer 2, a measuring sensor 4 is fixedly connected to the outside of the pressure balancer 2, an intelligent controller 5 is arranged outside the measuring sensor 4, and an environmental compensation module 6 is fixedly connected to the outside of the measuring trachea 1; A flow valve 101 is fixedly connected to the input port of the measuring trachea 1, the flow valve 101 is fixedly connected to the output port of the pressure balancer 2, the flow valve 101 adopts a piezoelectric micro-flow valve, the flow valve 101 is electrically connected to the intelligent controller 5, and the intelligent controller 5 monitors the pressure change rate in the measuring trachea 1 in real time and dynamically adjusts the gas flow of the flow valve 101 according to this rate.

[0022] The pressure balancer 2 includes a pressure vessel, the pressure vessel adopts a double-layer cavity structure, the double-layer cavity structure includes an outer cavity 201 and an inner cavity 202, the outer cavity 201 is provided with an elastic silicone diaphragm, which is made of elastic material and is used to absorb impacts.

[0023] The inner cavity 202 is filled with a ceramic material, multiple holes are opened in the ceramic material, and the outer surface of the inner cavity 202 is fixedly connected to the outer cavity 201 for buffering gas in the holes.

[0024] Through the above technical solutions, among which, the intelligent controller 5, the measurement sensor 4, the measurement air pipe 1 and the pressure balancer 2 are prior arts, originating from the bubble type water level measuring instrument with the patent publication number CN101413819A. A piezoelectric micro flow valve 101 is added at the inlet position of the measurement air pipe 1 and connected to the intelligent controller 5. The intelligent controller 5 monitors the pressure change rate in the measurement air pipe 1 in real time, and dynamically adjusts the gas flow rate of the piezoelectric micro flow valve 101 according to this rate. In the initial operation stage of the system, a high-frequency gas supply mode is adopted to accelerate the discharge of residual moisture in the measurement air pipe 1; when the pressure is close to the equilibrium state, it is automatically switched to a low-frequency pulse gas supply mode. On the premise of meeting the measurement requirements, the gas consumption is minimized, the gas use strategy and recycling mechanism are optimized, the gas consumption is reduced, and thus the overall service life of the gas source is effectively extended, and the frequency and cost of gas source replacement or replenishment are reduced. Among them, the pressure balancer 2 transforms the structure of the original pressure vessel and designs it into a double-layer cavity structure. The inner cavity 202 is filled with porous ceramic materials. The pore structure of the porous ceramic is used to achieve slow gas diffusion and buffering, effectively reducing the gas flow rate and pressure change rate; an elastic silica gel diaphragm is arranged in the outer cavity 201. Among them, the porous ceramic material is alumina ceramic, with a porosity of 40% - 60%, an average pore diameter of 50 - 100 μm, and a gas diffusion coefficient of 0.1 - 0.3 cm² / s, having the characteristics of high temperature resistance and high mechanical strength, avoiding damage to itself as the buffer main body. The elastic silica gel diaphragm of the outer cavity 201 is made of fluorosilicone rubber, with a Shore hardness of 40A, a tensile strength ≥ 8 MPa, and an elongation at break ≥ 300%, having high sealing performance and temperature resistance, capable of reducing the leakage rate while avoiding aging caused by temperature. When the system is impacted by instantaneous pressure fluctuations, the elastic silica gel diaphragm can undergo elastic deformation, absorb and buffer these instantaneous pressure fluctuations, make the pressure signal more stable, and can reduce the fluctuation amplitude of the pressure signal in complex environments such as turbulence, improving the stability and accuracy of pressure measurement.

[0025] Embodiment 2 As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 As shown in [relevant figures], the present invention provides a technical solution: an improved bubble type water level measuring instrument. The gas source circulation module 3 includes an oil-free air compressor 301. The output port of the oil-free air compressor 301 is fixedly connected with a one-way valve 302, and the output port of the one-way valve 302 is fixedly connected with the pressure balancer 2.

[0026] The oil-free air compressor 301 adopts a micro oil-free diaphragm air compressor. A condensation recovery device 303 is fixedly connected to the outside of the pressure balancer 2, and the condensation recovery device 303 is installed with the oil-free air compressor 301.

[0027] The condensation recovery device 303 includes a humidity sensor, which is electrically connected to the intelligent controller 5. The intelligent controller 5 is electrically connected to the condensation recovery device 303. The condensation recovery device 303 adopts a cyclone separation type condensation recovery device to process the condensed water through air flow centrifugation.

[0028] Through the above technical solution, the gas source circulation module 3 abandons the traditional gas storage tank and uses the micro oil-free air compressor 301 as the core component for gas supply. It cooperates with the one-way valve 302 and the condensation recovery device 303 to construct a gas source self-circulation system. The micro oil-free air compressor continuously generates gas, replacing the storage-release mode of the traditional gas storage tank. The one-way valve ensures the unidirectional flow of gas, ensuring that the gas can only flow from the oil-free air compressor 301 to the other end, preventing the backflow impact or pressure fluctuation from affecting the system stability. The condensation recovery device 303 recovers and processes the condensed water generated in the system, and purifies the gas to a certain extent, enabling the gas to be recycled. Among them, the humidity sensor is used to detect the humidity in the pipeline. When the humidity is low, the condensation recovery device 303 is not enabled. When the humidity is high, the data is transmitted to the intelligent controller 5, and the intelligent controller 5 turns on the condensation recovery device 303. Through the application of this gas source circulation module 3, the gas source replenishment cycle is greatly extended. In high humidity environments, such as rainy days and reservoirs, the moisture that may be mixed into the pipeline can also be removed, improving the measurement stability in complex environments, reducing the dependence on manual loading and unloading, and enhancing the independence and sustainability.

[0029] Embodiment III As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 As shown in

[0030] The temperature sensor 602 uses a PT100 platinum resistance and is electrically connected to the intelligent controller 5. When the temperature change rate exceeds ±0.5°C / min and the absolute temperature exceeds 5°C to 40°C, correction is triggered.

[0031] The turbidity sensor 603 uses an infrared scattering type turbidity sensor and is electrically connected to the intelligent controller 5. When the water turbidity exceeds 50 NTU and the turbidity change rate exceeds ±10 NTU / min, correction is triggered.

[0032] Through the above technical solution, a temperature sensor 602 and a turbidity sensor 603 are integrated at the end of the measuring trachea 1 to form an environmental compensation sensor group. The temperature sensor 602 monitors the temperature change in the measuring environment in real time, and the turbidity sensor 603 is used to detect the turbidity of the water quality. The intelligent controller 5 receives the data transmitted by the sensors and corrects and compensates the pressure value according to these data. When the temperature change rate exceeds ±0.5 °C / min or the absolute temperature exceeds 5 °C to 40 °C, it means that the temperature is in an abnormal environment, and the measured pressure value is corrected in real time. When the temperature rises, the gas density will also decrease. The intelligent controller 5 automatically adjusts the pressure value upward by the corresponding airtight decrease value to eliminate the density change error, and according to the different temperatures, increases the bubble release frequency at low temperatures <10 ° to compensate for the measurement delay caused by the increase in gas solubility, and decreases the frequency at high temperatures >35 ° to avoid the rapid rupture of bubbles interfering with the measurement. When the water quality turbidity exceeds 50 NTU or the turbidity change rate exceeds ±10 NTU / min, it means that the water quality will affect the bubble morphology. At mild turbidity, 50 - 100 NTU, the bubble frequency increases to avoid impurities adhering to the inner wall of the measuring trachea 1. When the turbidity is severely turbid >100 NTU, it is regarded as a blockage of the measuring trachea 1, and a large amount of gas is automatically used to backflush the trachea to try to remove the blockage. When the severe turbidity >100 NTU lasts for half an hour, a warning is sent to the staff through the intelligent controller 5 to remind the staff to come and deal with it as soon as possible. When both the temperature and turbidity are abnormal, such as a sudden drop in water temperature and a sharp increase in turbidity caused by a heavy rain, the intelligent controller 5 gives priority to dealing with turbidity compensation because the risk of impurity blockage is higher, and then superimposes temperature compensation, that is, first changes the bubble frequency, and then corrects the pressure value based on the current temperature compensation. This environmental compensation module 6 effectively improves the measurement adaptability of the system in a complex environment, makes the measurement results more accurate and reliable, and reduces the measurement error caused by environmental factors. The core is to quantify the change of environmental parameters into executable compensation actions and can timely remind the staff in case of emergencies.

[0033] In use, the intelligent controller 5, the measurement sensor 4, the measurement air pipe 1 and the pressure balancer 2 are prior arts, from a bubble-type water level measuring instrument with the patent publication number CN101413819A. A piezoelectric micro flow valve 101 is added at the inlet position of the measurement air pipe 1 and connected to the intelligent controller 5. The intelligent controller 5 monitors the pressure change rate in the measurement air pipe 1 in real time and dynamically adjusts the gas flow rate of the piezoelectric micro flow valve 101 according to this rate. In the initial operation stage of the system, a high-frequency gas supply mode is adopted to accelerate the discharge of residual moisture in the measurement air pipe 1; when the pressure is close to the equilibrium state, it automatically switches to a low-frequency pulse gas supply mode. On the premise of meeting the measurement requirements, the gas consumption is minimized, the gas use strategy and the recycling mechanism are optimized, the gas consumption is reduced, and thus the overall service life of the gas source is effectively extended, and the frequency and cost of gas source replacement or replenishment are reduced. Among them, the pressure balancer 2 transforms the structure of the original pressure vessel and designs it into a double-layer cavity structure. The inner cavity 202 is filled with porous ceramic materials, and the pore structure of the porous ceramic is used to realize the slow diffusion and buffering of gas, effectively reducing the gas flow rate and the pressure change rate; an elastic silicone diaphragm is provided in the outer cavity 201. Among them, the porous ceramic material is alumina ceramic, with a porosity of 40% - 60%, an average pore diameter of 50 - 100μm, and a gas diffusion coefficient of 0.1 - 0.3 cm² / s, having the characteristics of high temperature resistance and high mechanical strength, avoiding damage to itself as the buffering main body. The elastic silicone diaphragm of the outer cavity 201 is made of fluorosilicone rubber, with a Shore hardness of 40A, a tensile strength ≥ 8 MPa, and an elongation at break ≥ 300%, having high sealing performance and temperature resistance, capable of reducing the leakage rate while avoiding aging caused by temperature. When the system is impacted by instantaneous pressure fluctuations, the elastic silicone diaphragm can undergo elastic deformation, absorb and buffer these instantaneous pressure fluctuations, make the pressure signal more stable, and can reduce the fluctuation amplitude of the pressure signal in complex environments such as turbulence, improving the stability and accuracy of pressure measurement.The air source circulation module 3 abandons the traditional gas storage tank, uses a micro oil-free air compressor 301 as the core component for gas supply, and constructs an air source self-circulation system in cooperation with a one-way valve 302 and a condensation recovery device 303. The micro oil-free air compressor continuously generates gas, replacing the storage-release mode of the traditional gas storage tank. The one-way valve ensures the unidirectional flow of gas, ensuring that the gas can only flow from the oil-free air compressor 301 to the other end, preventing the backflow impact or pressure fluctuation from affecting the system stability. The condensation recovery device 303 recovers and processes the condensate generated in the system, and purifies the gas to a certain extent, enabling the gas to be recycled. Among them, the humidity sensor is used to detect the humidity in the pipeline. When the humidity is low, the condensation recovery device 303 is not enabled. When the humidity is high, the data is transmitted to the intelligent controller 5, and the intelligent controller 5 opens the condensation recovery device 303. Through the application of this air source circulation module 3, the air source replenishment cycle is greatly extended. In high-humidity environments such as rainy days and reservoirs, the moisture that may be mixed into the pipeline can also be removed, improving the measurement stability in complex environments, reducing the dependence on manual loading and unloading, and enhancing the independence and sustainability.Integrate a temperature sensor 602 and a turbidity sensor 603 at the end of the measuring trachea 1 to form an environmental compensation sensor group. The temperature sensor 602 monitors the temperature changes in the measuring environment in real time, and the turbidity sensor 603 is used to detect the turbidity of the water quality. The intelligent controller 5 receives the data transmitted by the sensors and corrects and compensates the pressure value according to these data. When the temperature change rate exceeds ±0.5 °C / min or the absolute temperature exceeds 5 °C to 40 °C, it means that the temperature is in an abnormal environment, and the measured pressure value is corrected in real time. When the temperature rises, the gas density will also decrease. The intelligent controller 5 automatically increases the pressure value by the corresponding airtight decrease value to eliminate the density change error, and according to the different temperatures, increases the bubble release frequency at low temperatures <10 ° to compensate for the measurement delay caused by the increase in gas solubility, and decreases the frequency at high temperatures >35 ° to avoid the rapid rupture of bubbles interfering with the measurement. When the water quality turbidity exceeds 50 NTU or the turbidity change rate exceeds ±10 NTU / min, it means that the water quality will affect the bubble morphology. In the case of mild turbidity, 50 - 100 NTU, the bubble frequency increases to avoid impurities adhering to the inner wall of the measuring trachea 1. In the case of severe turbidity >100 NTU, it is regarded as a blockage of the measuring trachea 1, and a large amount of gas is automatically used to backflush the trachea to try to remove the blockage. When the severe turbidity >100 NTU lasts for half an hour, a warning is given to the staff through the intelligent controller 5, reminding the staff to come and deal with it as soon as possible. When both the temperature and turbidity are abnormal, such as a sudden drop in water temperature and a sharp increase in turbidity caused by heavy rain, the intelligent controller 5 gives priority to turbidity compensation because the risk of impurity blockage is higher, and then superimposes temperature compensation, that is, first changes the bubble frequency, and then corrects the pressure value based on the current temperature compensation. This environmental compensation module 6 effectively improves the measurement adaptability of the system in complex environments, makes the measurement results more accurate and reliable, and reduces the measurement errors caused by environmental factors. The core lies in quantifying the changes in environmental parameters into executable compensation actions and being able to timely remind the staff in case of emergencies.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made therein without departing from the principle and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An improved bubble-type water level measuring instrument, comprising a measuring air pipe (1), characterized in that: The input port of the measuring air pipe (1) is provided with a pressure balancer (2), the outer side of the pressure balancer (2) is provided with an air source circulation module (3), the outer side of the pressure balancer (2) is fixedly connected with a measuring sensor (4), the outer side of the measuring sensor (4) is provided with an intelligent controller (5), and the outer side of the measuring air pipe (1) is fixedly connected with an environmental compensation module (6); The input port of the measuring air pipe (1) is fixedly connected to a flow valve (101), the flow valve (101) is fixedly connected to the output port of the pressure balancer (2), the flow valve (101) is a piezoelectric micro flow valve, the flow valve (101) is electrically connected to an intelligent controller (5), and the intelligent controller (5) monitors the pressure change rate in the measuring air pipe (1) in real time and dynamically adjusts the gas flow of the flow valve (101) according to the pressure change rate.

2. An improved bubble type water level measuring instrument according to claim 1, characterized in that: The pressure balancer (2) comprises a pressure vessel, the pressure vessel adopts a double-layer cavity structure, the double-layer cavity structure comprises an outer cavity (201) and an inner cavity (202), the outer cavity (201) is provided with an elastic silicone diaphragm, which is made of elastic material and is used to absorb impact.

3. An improved bubble type water level measuring instrument according to claim 2, characterized in that: The inner cavity (202) is filled with a ceramic material, a plurality of pores are provided in the ceramic material, and the outer surface of the inner cavity (202) is fixedly connected to the outer cavity (201) so as to allow gas to buffer in the pores.

4. The improved bubble type water level measuring instrument according to claim 1 is characterized in that: The air source circulation module (3) comprises an oil-free air compressor (301), the output port of the oil-free air compressor (301) is fixedly connected to a one-way valve (302), and the output port of the one-way valve (302) is fixedly connected to a pressure balancer (2).

5. An improved bubble type water level measuring instrument according to claim 4, characterized in that: The oil-free air compressor (301) is a miniature oil-free diaphragm air compressor, and a condensate recovery device (303) is fixedly connected to the outside of the pressure balancer (2), and the condensate recovery device (303) is installed on the oil-free air compressor (301).

6. The improved bubble type water level measuring instrument according to claim 5, characterized in that: The condensation recovery device (303) comprises a humidity sensor, the humidity sensor is electrically connected to the intelligent controller (5), the intelligent controller (5) is electrically connected to the condensation recovery device (303), and the condensation recovery device (303) adopts a cyclone separation type condensation recovery device to process condensed water through airflow centrifugation.

7. The improved bubble type water level measuring instrument according to claim 1 is characterized in that: The environmental compensation module (6) comprises a mounting block (601), the interior of the mounting block (601) being fixedly connected to the outside of the measuring air pipe (1), and the outer surface of the mounting block (601) being provided with two mounting grooves, one of the mounting grooves having a temperature sensor (602) mounted therein, and the other of the mounting grooves having a turbidity sensor (603) mounted therein.

8. The improved bubble type water level measuring instrument according to claim 7 is characterized in that: The temperature sensor (602) is a PT100 platinum resistor. The temperature sensor (602) is electrically connected to the intelligent controller (5). When the temperature change rate exceeds ±0.5°C / min, or the absolute temperature exceeds 5°C to 40°C, correction is triggered.

9. The improved bubble type water level measuring instrument according to claim 7, characterized in that: The turbidity sensor (603) is an infrared scattering turbidity sensor. The turbidity sensor (603) is electrically connected to the intelligent controller (5). When the water turbidity exceeds 50 NTU and the turbidity change rate exceeds ±10 NTU / min, correction is triggered.

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