CN116088382A - Device capable of automatically adjusting and stabilizing turbid liquid in output concentration range - Google Patents
Device capable of automatically adjusting and stabilizing turbid liquid in output concentration range Download PDFInfo
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Abstract
The invention provides a device capable of automatically adjusting and stabilizing turbid liquid in an output concentration range, which comprises: the system comprises a storage unit, a sensing monitoring unit, a data collection and control integrated unit, a power supply unit, a communication unit and a cloud platform; the storage unit stores working state turbid liquid; sensing and monitoring to obtain information in the storage unit and processing the information into signal output; the data collection and control unit receives and converts the sensor signals; the power supply unit is responsible for providing an energy source; the communication unit receives the singlechip signal, realizes the rotation stirring function, outputs real-time monitoring information to the cloud platform, and a user can remotely monitor the working condition of the device through the cloud platform and adjust the working condition. The beneficial effects of the invention are as follows: the method realizes the acquisition of different turbid liquids such as solution, turbid liquid, colloid mixed liquid and the like, and has wide application.
Description
Technical Field
The invention relates to the technical field of turbid liquid concentration adjustment, in particular to a device capable of automatically adjusting and stabilizing turbid liquid in an output concentration range.
Background
The turbid liquid is widely applied in the production and life of China, and along with the continuous development of economy and society, the requirements on the stability and the accuracy of the concentration range of the turbid liquid in the application of the turbid liquid are continuously improved. In industrial departments of chemical industry, textile industry, cement gypsum products, wood, medicine, food, and the like, and scientific research works of environment, resources, and the like, a large amount of turbid liquids such as water starch, lime milk, and the like, which need continuous automatic monitoring and precise concentration control, are easy to precipitate or suspend, are not uniformly distributed, have non-single components and have different physicochemical properties, so the continuous automatic monitoring and concentration control of the turbid liquid concentration are generally difficult. Due to the non-uniformity and instability of the turbid liquid, the problems of precipitation, particle coagulation, scaling and the like exist, and the turbid liquid required by stable and effective production and living is difficult to obtain, so that the promotion of related work is not facilitated. In addition, there is a certain degree of blank in the research of combining monitoring and control of the concentration of turbid liquid with automation and a computer, and more lack of related operations for realizing accurate control of the concentration of turbid liquid through an algorithm.
Disclosure of Invention
In order to solve the above problems, the present invention provides a device capable of automatically adjusting and stabilizing turbid liquid in an output concentration range, which mainly comprises:
the system comprises a storage unit, a sensing monitoring unit, a data collection and control unit, a communication unit and a cloud platform; the sensing monitoring unit comprises six turbidity electrodes, a PTU100 system is adopted to collect data, the data are output as RS485 signals, and the concentration of turbid liquid in the storage unit is monitored in real time.
The storage unit is used for storing turbid liquid in a working state;
the communication unit is used for receiving the singlechip signals in the data collection and control unit, realizing the rotation stirring function and outputting real-time monitoring information to the cloud platform;
the sensing monitoring unit is used for obtaining information in the storage unit and processing the information into signal output;
the data collection and control unit is used for receiving and converting the signals sent by the sensor monitoring unit;
a power supply unit for providing a source of energy for the device;
the cloud platform is used for remotely monitoring the working condition of the device and adjusting the working condition;
the sensing monitoring unit collects data by adopting a PTU100 system, and the system outputs an RS485 signal to monitor the concentration of turbid liquid in the storage unit in real time;
after adding needed solute/colloid/suspended matters and fluid into the storage unit, turning on a power supply of the device, controlling a motor in the data collection and control unit by an electric signal to drive a propeller connected with a transmission rod to rotate, stirring the solute/colloid/suspended matters and the fluid, and starting the first to fifth sensors a, b, c, d and e after a period of time;
the turbidity concentration range is read by a turbidity electrode in a sensing monitoring unit in real time while the propeller rotates and stirs, and the turbidity concentration range read by a turbidity collecting electrode is output as an RS485 signal after being processed by the PTU100 system, and is converted into an RS232 signal by a circuit;
the data collection and control unit receives the RS232 signal sent by the sensing monitoring unit, and a fuzzy PID control algorithm built in an STM32 singlechip of the control unit corrects the rotating speed and the steering direction of the propeller in advance through a preset turbid liquid concentration range input by the cloud platform, so that the turbid liquid concentration in the device approaches to the preset turbid liquid concentration range;
when the concentration of turbid liquid monitored by the first sensor to the fifth sensor a, b, c, d and e is in a preset turbid liquid concentration range, the sixth sensor f is started, concentration data in the primary storage chamber is collected through the PTU100 system in the electrode, when the data monitored by the sixth sensor f are in the preset turbid liquid concentration range for a long time, an outlet below the primary storage chamber is controlled to be opened by a control unit (STM 32 singlechip) to output target turbid liquid concentration, in the process, the first sensor to the sixth sensor a-f continuously work, and when the concentration in the primary storage chamber monitored by the f is out of the preset turbid liquid concentration range, the outlet below the control unit is controlled to be closed, and turbid liquid output is suspended;
the first to fifth sensors a-e monitor that the concentration does not reach the preset turbid liquid concentration range for a long time, or the concentration does not change to the preset turbid liquid concentration range within a period of time after correction is started, or the change exceeds the preset turbid liquid concentration range, and the control unit controls the display lamp on the storage unit to flash for a period of time;
the sensing monitoring unit continuously monitors the concentration of turbid liquid in the storage unit, the data collection and control unit 6 controls the propeller, the lower outlet 3 and the display lamp 4, and the above process is repeated for a plurality of times until the required turbid liquid is obtained; in the whole process, the communication unit transmits the sensor data to the cloud platform in real time, and after the terminal logs in the cloud platform, a user can check the data and issue instructions, so that the access and remote monitoring and control of the Internet of things of the system are realized.
Further, the storage unit is a drum with a height of 1m and a diameter of 0.5 m. The storage unit consists of an outer storage chamber and a primary storage chamber, adopts different connection and combination modes according to different purposes, and selects proper materials according to the specific hardness and corrosion resistance degree requirements by professionals.
Further, four electrode interfaces are symmetrically distributed on the side wall of the barrel of the storage unit at intervals of 0.2m and 0.8m, a primary storage chamber containing a lower outlet is arranged at the bottom of the barrel and connected with the barrel wall, turbidity electrodes are distributed in the center of the bottom and the primary storage chamber respectively, and a display lamp is arranged at the top of the barrel.
Further, the communication unit comprises two motors and two transmission shafts which are arranged in the transmission rods and are connected with two propellers with opposite installation directions, the motors and the transmission shafts are connected to the speed regulating motor, and the motors drive the propellers to rotate through signals of the receiving control unit.
Further, the sensing monitoring unit comprises six turbidity electrodes, wherein the turbidity electrodes are respectively positioned at four electrode interfaces, the center of the bottom of the barrel and the primary storage chamber, which are distributed at intervals at the heights of 0.2m and 0.8 m.
Further, the specific specification of the turbidity electrode is that the diameter is 60mm, the length is 256mm, the power supply is powered by 220VAC, concentration data are collected through the PTU100 system, and the turbidity electrode is output to the data collection and control unit by using an MODBUS-RTU communication protocol through an RS485 signal.
Further, the data collection and control unit is located above the drum, the singlechip STM32VET6 is used as a main control MCU to input and output signals, RS485 signals output by the six turbidity electrodes are converted into RS232 signals through a circuit, the signals are collected and preprocessed by the main control MCU, and a fuzzy PID algorithm is mainly adopted for processing concentration signals.
Further, an output interface of the data collection and control unit is connected with an outlet below the primary storage chamber, a display lamp and two motors connected with the propeller through a transmission rod;
after the PTU100 system collects the signal that the concentration of the primary storage chamber reaches the standard after the sensor f monitors, the singlechip STM32VET6 is used as a main control MCU to control the L298N motor driving chip by receiving and outputting the electric signal, so as to control a single steering engine to turn on and turn off, if the concentration of the primary storage chamber reaches the standard, the lower outlet is controlled to be opened, the target turbid liquid is output, and if the concentration of the primary storage chamber does not reach the standard, the lower outlet is not opened;
when the concentration of the sensors a-e is not in the preset turbid liquid concentration range after long-time monitoring, or the concentration of the turbid liquid is not changed to the preset turbid liquid concentration range after 60s of correction is started, or the turbid liquid concentration change exceeds the controllable range (20%) of the preset curve, the display lamp is controlled to be turned on and the display lamp is controlled to flash for a period of time;
when the sensors a-e continuously monitor whether the concentration of turbid liquid is consistent, if the a, c side (or b, d side) is obviously larger than the b, d side (or a, c side), the main control MCU controls the rotation direction of the stirrer to be reversed, and then the stirrer is reversed again; if the monitoring concentration of the sensors c, d and e affected by the precipitation is obviously larger than that of the sensors a and b, the control unit controls the blades at the bottom of the stirrer to turn, and the rotation of the blades at the lower parts of the first transmission shaft and the second transmission shaft of the stirrer is stopped; if the concentration monitored by the sensors a, b is obviously larger than that of the sensors c, d and e under the influence of the suspension phenomenon, the control unit controls the upper fan blade and the lower fan blade to increase the rotating speed.
Further, the power supply unit performs voltage reduction, rectification, filtering and voltage stabilization treatment on an external power supply so as to provide direct current power supply for each unit of the device, and the device comprises a direct current power supply circuit and a power plug connected with the external power supply.
Further, the communication unit is connected with the Bafa cloud platform by adopting an ESP8266 module to input and output information, supports a publish-subscribe mode by adopting a TCP protocol, transmits real-time data of the sensor to the cloud server, receives the data sent to the cloud server by the An Zhuoduan APP in real time, and transmits the data to the main control MCU to control the corresponding executor, so that remote monitoring and control of a user are realized.
Furthermore, before the device is put into use, a professional is required to conduct a pre-experiment, and a concentration change standard curve is obtained through debugging.
The technical scheme provided by the invention has the beneficial effects that: the problems that a stable state suspension and a colloid mixed solution are difficult to obtain due to precipitation, scaling and the like in the related fields are solved, the acquisition of different suspensions such as a solution, the suspension and the colloid mixed solution is realized, the continuous monitoring of the state of a working suspension is realized, and the accurate control of the concentration change is realized according to the input of a pre-algorithm.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a block diagram of an apparatus for autonomously adjusting a stable output concentration range of a turbid liquid in an embodiment of the present invention.
FIG. 2 is a flow chart of the autonomous adjustment of the turbid liquid in the stable output concentration range in the embodiment of the invention.
The device comprises a 1-outer storage chamber, a 2-primary storage chamber, a 3-lower outlet, a 4-display lamp, a 5-transmission rod, a 6-data collection and control unit, a 7-communication unit, an 8-power supply unit, a 9-cloud platform, an i-upper propeller, a j-lower propeller, an i 0-first transmission shaft, a j 0-second transmission shaft, an a-first sensor, a b-second sensor, a c-third sensor, a d-fourth sensor, an e-fifth sensor and an f-sixth sensor.
FIG. 3 is a schematic diagram of a connection mode between an STM32 singlechip and each control unit in an embodiment of the invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
The embodiment of the invention provides a device capable of automatically adjusting and stabilizing turbid liquid in an output concentration range. Under the general working condition, the continuous monitoring of the working turbid liquid state and the accurate control of concentration change according to the input of a pre-algorithm can be realized, the problem that the stable turbid liquid and colloid mixed liquid are difficult to obtain due to the problems of precipitation, scaling and the like in the related field is solved, an effective method for producing the required turbid liquid is provided for the departments of environment, food, chemical industry, medicine, mineral separation and the like, and the automatic design, the mechanical design and the computer field are integrated, so that the product meets the industrial requirement more and meets the development requirement of the modern society.
Referring to fig. 1, fig. 1 is a flowchart of a device capable of automatically adjusting a stable output concentration range of turbid liquid according to an embodiment of the invention, for continuously monitoring and automatically controlling the stable output turbid liquid, which specifically includes: the system comprises a storage unit, a sensing and monitoring unit, a data collection and control unit 6, a communication unit 7, a power supply unit 8 and a cloud platform 9.
And a storage unit: the device is used for storing original substances, mixing the substances and outputting target turbid liquid, and comprises an outer storage chamber 1, a primary storage chamber 2 and a lower outlet 3, wherein proper device materials are selected to be made into a capped barrel with the bottom diameter of 0.5m by comprehensively considering factors such as production requirements, device cost, development difficulty and the like. In the example, a carbon steel/stainless steel mixture is used to obtain a loess suspension for experimental use. The bottom of the barrel is tightly attached to the wall of the barrel, a primary storage chamber 2 with the length of 10cm and the width of 5cm is arranged, and the concentration of turbid liquid in the primary storage chamber 2 is used as a standard for judging whether to output turbid liquid. The unit is provided with 6 electrode interfaces a-f, wherein two interfaces a-d are symmetrically distributed at 0.2m and 0.8m of the barrel respectively, and the other two interfaces e-f are distributed in the center of the bottom of the barrel and the primary storage chamber. The outside of the barrel cover is provided with a display lamp 4 which is lighted red in the embodiment.
Communication unit 7: the stirrer is composed of two motors and two transmission shafts which are connected with two upper propellers i and two lower propellers j with opposite installation directions and are arranged in a transmission rod 5, and the motors control the rotating speeds and the steering of the upper propellers and the lower propellers by receiving signals of a data collection and control unit. The transmission rod 5 comprises a first transmission shaft i0 and a second transmission shaft j0, the transmission rod 5 is 0.8m long, the upper propeller i and the lower propeller i and j are respectively composed of two blades with the length of 20cm, the blades are positioned at the heights of 0.3m and 0.9m, the upper propeller i comprises the first transmission shaft i0 and the blades connected to the bottom end of the first transmission shaft i0, the lower propeller j comprises the second transmission shaft j0 and the blades connected to the bottom end of the second transmission shaft j0, the upper propeller and the lower propeller are identical in design and opposite in installation direction, and when the concentrations of the first 5 sensors a-e at the initial stage are not identical, the upper propeller and the lower propeller are identical in steering. In the embodiment, the 40W direct current speed reducing motor 6D300GU-C with the voltage of 24V is adopted, so that the experimental requirements of speed regulation and forward and reverse rotation can be met.
And a sensing monitoring unit: the device comprises 6 turbidity electrodes a-f, wherein the 6 turbidity electrodes a-f are correspondingly distributed at the 6 electrode interfaces and are positioned in an outer storage chamber 1, the turbidity electrodes a-d are respectively positioned at four electrode interfaces which are distributed at the heights of 0.2m and 0.8m at intervals, a turbidity electrode e is positioned at the center of the bottom of a barrel, and the turbidity electrode f is positioned in a primary storage chamber. The turbidity electrodes a-f are distributed and dispersed, so that the reliability of monitoring the turbidity of the turbid liquid is improved, and the concentration stability of the turbid liquid is ensured; the turbidity electrodes are in one-to-one correspondence with the sensors, the turbidity electrodes are MIK-PTU100 on-line turbidity monitors, TU100 is the model of a built-in signal processing system of the turbidity monitors adopted in the embodiment, turbidity can be continuously and accurately measured by an ISO7027 method, the diameter is 60mm, the length is 256mm, the machine body is made of PVC materials, the measurement accuracy is less than +/-5% of the measured value, and the production accuracy requirement is met. The electrode power supply adopts 220VAC power supply, concentration data is collected through the PTU100 system, and the data is output to the data collection and control unit through an RS485 signal by adopting a MODBUS-RTU communication protocol. The screen display of the turbidity meter concentration controller adopts a 2.8 inch monochromatic liquid crystal display screen, and the resolution is 128 x 64, thereby meeting the requirements.
Data collection and control unit 6: the device is used for collecting turbidity signals and outputting control signals to realize automatic control of an outlet 3, a display lamp 4 and a stirrer below the primary storage chamber 2. By comprehensively considering the performance requirements of GPIO ports, analog-to-digital converters, working frequencies and the like, and integrating the factors of design cost, development difficulty and the like, an STM32VET6 singlechip with high performance and low power consumption is selected as a main control MCU to input and output signals. The MCU adopting the ARM Cortex-M4 kernel can provide enough instruction execution speed by 168MHz main frequency, the 512K Flash can store enough codes, 82 GPIOs can meet the use requirements of each unit such as a motor, a turbidity meter and the like, the 12-bit ADC and DAC can mutually convert digital signals and analog signals, the chip supports the working temperature of-40-85 ℃, and the chip can fully adapt to the working environment.
The RS485 signals output by the six turbidity electrodes are converted into RS232 signals through an RS232/RS485 conversion circuit (comprising an RS485 converter and a cable), the purpose is to transmit information and control a switch, an anti-surge product with an isolation grid is preferably selected for an industrial environment with complex conditions, and signals are collected and preprocessed by a main control MCU (micro control Unit), wherein a fuzzy PID (proportion integration differentiation) algorithm is mainly adopted for processing concentration signals. The specific operation flow is as follows: the algorithm carries out fuzzification on the concentration data C1 and C2 and the concentration data change rate C1C, C C acquired by the sensors a and b in real time, then obtains the membership degree of the output value C1S, C S according to different logic fuzzy subsets, membership degree functions and fuzzy rule tables, and obtains C1S, C S through defuzzification, thereby realizing the fuzzy-feedforward compensation control in the initial mixing stage and the effect of convergence of the concentration range of the preset turbid liquid. Through setting of the fuzzy round area, the measured concentration has stronger anti-interference capability. And inputting the obtained C1S, C S into a PID controller, and combining with a sensor C to complete the specific control of the fuzzy PID. In the embodiment, the fluctuation range of the preset steady-state error is 20%, and when the steady-state error of the actual output value exceeds 20%, the rotating speed and the steering of the propeller are corrected mainly through the function of the P parameter according to the flow; the actual output value steady state error is less than 20% and is close to the equilibrium period, mainly through I, D parameter according to the above-mentioned procedure to adjust; when the current 5 sensors a-e detect that the gradient of the concentration change curve exceeds a preset fluctuation range, correcting the rotating speed and the steering of the propeller according to the flow. Through scientific experiments, the concentration control of the set of fuzzy PID algorithm can meet the requirement of producing stable concentration.
The unit realizes automatic control of an outlet 3, a display lamp 4 and a stirrer below the primary storage chamber 2 by three lines: as shown in fig. 3, the STM32 single-chip microcomputer outputs an electric signal to the motor driving chip, the motor driving chip amplifies the electric signal to output the electric signal so as to control the steering engine, the steering of the steering engine can influence the water flow direction in the storage device (similar to forward running and backward running of a ship), the motor driving chip amplifies the electric signal after receiving the electric signal (acquires electricity from a power supply), and then drives the steering engine to change the rotation direction or stop rotating, so that the opening and closing of the outlet 3 below the primary storage chamber 2 are controlled; the STM32 singlechip outputs an electric signal to a 1298n motor for driving to amplify the electric signal, the 1298n motor is connected with two direct current motors, and the two propellers a and b are respectively driven to stir by a transmission rod; the STM32 singlechip outputs an electric signal to drive the bipolar junction transistor BJT and the light emitting diode, so as to realize the control of the display lamp 4.
Communication unit 7: through comprehensively considering aspects such as data stability, instantaneity, module power consumption, communication conditions of working environment and cost, the singlechip STM32 is connected with the Bafa cloud platform through the ESP8266 module, adopts the TCP protocol, transmits real-time concentration data acquired by a sensor to a cloud server through the ESP8266 module, receives data sent to the cloud server by An Zhuoduan APP in real time and then transmits the data to an MCU control executor, and completes the access of the Internet of things of the system, thereby realizing remote monitoring and control. Through experimental determination, the communication unit is stable and can complete the target task.
Power supply unit 8: the external power supply is subjected to voltage reduction, rectification, filtering and voltage stabilization treatment so as to provide direct current power supply for each unit of the device, and the device comprises a direct current power supply circuit and a power plug for connecting a 1298n motor with the external power supply. In this embodiment, the power supply unit uses a household 220VC to supply power, and is electrically connected to the input terminal of the controlled unit.
Cloud platform 9: the open source Bafa cloud internet of things platform provided by the operator adopts a subscription and release mode of the Bafa cloud internet of things platform and a platform access protocol of a TCP creating cloud, a publisher device and a subscriber device are mutually independent, and other operations are not suspended during message release or receiving. Before use, professional personnel need to set the destination IP, the destination port, the user private key, the user theme and the message body format, and system initialization is completed.
After the selection of the above units is completed, the device assembly is performed according to fig. 1. In this embodiment, the storage drum and the blades of the stirrer are made of a mixed material of carbon steel and stainless steel, and the specific distribution of each unit is shown in fig. 1, and after the storage unit, the sensing and monitoring unit, the data collecting and controlling unit 6, the power supply unit 8, the communication unit 7 and the cloud platform 9 are assembled, the required substances are added according to the concentration of the required turbid liquid. Before the device is put into use, a professional is required to conduct a pre-experiment, a concentration change curve is obtained through debugging, and a preset curve is input into a control unit mainly composed of the stm32 singlechip through a cloud platform.
After the device Is assembled, proper rotating speed, power and the like are selected by a professional according to the requirements of target turbid liquid, a pre-experiment Is carried out, a concentration change curve Is obtained through multiple debugging, and frequency parameters such as I, D, I +, is and the like and gain decibels are set. After the standard curve is obtained, the device performs the following procedure as shown in fig. 2:
(1) Checking the tightness and experimental timeliness of the device, connecting a power supply, repeating experiments for a plurality of times by a professional to obtain a turbidity change curve, debugging an STM32 singlechip, manufacturing suspensions with different concentrations, and manufacturing a standard curve by corresponding the concentrations to the turbidity meter;
(2) The starting device is used for adding a certain amount of solute/colloid/suspended matters and corresponding solvents/dispersing agents into the storage unit, starting a power supply, starting an upper propeller and a lower propeller of the stirrer, starting the stirrer after 10 seconds, continuously monitoring the concentration range, collecting concentration data through a PTU100 system, and outputting the concentration data to the data collecting and controlling unit by adopting a MODBUS-RTU communication protocol through an RS485 signal;
(3) The data collection and control unit adopts an STM32 singlechip as a main control MCU, a fuzzy PID algorithm is built in, and when the steady-state error of the actual output value exceeds 20%, the rotating speed and the steering of the propeller are corrected mainly through the action of P parameters; during the approximate equilibrium period when the steady-state error of the actual output value is less than 20%, the actual output value is mainly adjusted by I, D parameters; the current 5 sensors monitor that the gradient of the concentration change curve exceeds a preset fluctuation range, and the control unit corrects the rotating speed and the steering of the propeller;
(4) When the concentration of the turbid liquid is continuously monitored by the sensors a-e, if the concentration of the turbid liquid is consistent, the main control MCU controls the rotation direction of the stirrer to be reversed and then the stirrer is reversed again if the side a, the side c (or the side b, the side e) is obviously larger than the side b, the side e (or the side a, the side c); if the monitoring concentration of the sensor c-e affected by the precipitation is obviously larger than that of the sensor a and the sensor b, the control unit controls the rotation of the blades at the bottom of the stirrer and stops the rotation of the blades at the upper part of the stirrer; if the concentration monitored by the sensors a and b is obviously larger than that of the sensors c-e under the influence of the suspension phenomenon, the control unit controls the upper fan blade and the lower fan blade to increase the rotating speed.
(5) The data collection and control unit controls the red display lamp to flash for 30s when the following conditions occur:
the concentration of the sensor a-e is still not in the preset turbid liquid concentration range after long-time monitoring;
the sensors a-e monitor that the concentration of the turbid liquid in 60s after the main control MCU starts to correct is still unchanged from the preset turbid liquid concentration range;
the sensor detects that the concentration change exceeds the preset turbid liquid concentration range (20%), the curve of the preset turbid liquid concentration range is a time-concentration change curve which needs to be input by a preset person, the curve can be generated in a system by giving curve parameters or directly inputting curve analysis type, and the curve is the basis of self-adjustment of a control unit according to the concentration change.
(6) After the monitoring concentration of the sensors a-e is in a preset turbid liquid concentration range, starting a sensor f, controlling a lower outlet to be opened after a PTU100 system collects signals of the sensor f for monitoring that the concentration of a primary storage chamber reaches the standard, and outputting target turbid liquid, wherein if the concentration of the target turbid liquid does not reach the standard, a control unit controls the lower outlet not to be opened;
(7) The ESP8266 module is adopted in the whole process to upload real-time data monitored by the sensor to the cloud server, and data sent to the cloud server by An Zhuoduan APP are received in real time and transmitted to the MCU to control the corresponding executor, so that a user can realize remote monitoring and control at the terminal.
Note that the above parameters are based only on the specific apparatus used in the examples for production of the target turbid liquid, and the actual situation requires a professional depending on the kind, yield, and the like of the target turbid liquid.
The beneficial effects of the invention are as follows: the method solves the problems that the stable suspension and the colloid mixed solution are difficult to obtain due to precipitation, scaling and the like in the related fields, realizes the acquisition of different suspensions such as solution, suspension and colloid mixed solution, continuously monitors the state of working suspension and realizes the accurate control of concentration change according to the input of a pre-algorithm, and provides an effective method for producing the required suspension for the departments such as environment, food, chemical industry, medicine, mineral separation and the like, and has strong applicability.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a device that can independently adjust stable output concentration range turbid liquid which characterized in that: comprising the following steps: the system comprises a storage unit, a sensing monitoring unit, a data collection and control unit, a power supply unit, a communication unit and a cloud platform;
the storage unit is used for storing turbid liquid in a working state;
the communication unit is used for receiving the singlechip signals in the data collection and control unit, realizing the rotation stirring function and outputting real-time monitoring information to the cloud platform;
the sensing monitoring unit is used for obtaining information in the storage unit and processing the information into signal output;
the data collection and control unit is used for receiving and converting the signals sent by the sensor monitoring unit;
a power supply unit for providing a source of energy for the device;
the cloud platform is used for remotely monitoring the working condition of the device and adjusting the working condition;
the sensing monitoring unit collects data by adopting a PTU100 system, and the system outputs an RS485 signal to monitor the concentration of turbid liquid in the storage unit in real time;
after adding needed solute/colloid/suspended matters and fluid into the storage unit, turning on a power supply of the device, controlling a motor in the data collection and control unit by an electric signal to drive a propeller connected with a transmission rod to rotate, stirring the solute/colloid/suspended matters and the fluid, and starting the first to fifth sensors a, b, c, d and e after a period of time;
the turbidity concentration range is read by a turbidity electrode in a sensing monitoring unit in real time while the propeller rotates and stirs, and the turbidity concentration range read by a turbidity collecting electrode is output as an RS485 signal after being processed by the PTU100 system, and is converted into an RS232 signal by a circuit;
the data collection and control unit receives the RS232 signal sent by the sensing monitoring unit, and a fuzzy PID control algorithm built in an STM32 singlechip of the control unit corrects the rotating speed and the steering direction of the propeller in advance through a preset turbid liquid concentration range input by the cloud platform, so that the turbid liquid concentration in the device approaches to the preset turbid liquid concentration range;
when the concentration of turbid liquid monitored by the first sensor to the fifth sensor a, b, c, d and e is in a preset turbid liquid concentration range, the sixth sensor f is started, concentration data in the primary storage chamber is collected through the PTU100 system in the electrode, when the data monitored by the sixth sensor f is in the preset turbid liquid concentration range for a long time, the control unit controls the lower outlet to be opened, the target turbid liquid concentration is output, in the process, the first sensor to the sixth sensor a-f continuously work, and when the concentration in the primary storage chamber is monitored by the f to deviate from the preset turbid liquid concentration range, the control unit controls the lower outlet to be closed, and turbid liquid output is suspended;
the first to fifth sensors a-e monitor that the concentration does not reach the preset turbid liquid concentration range for a long time, or the concentration does not change to the preset turbid liquid concentration range within a period of time after correction is started, or the change exceeds the preset turbid liquid concentration range, and the control unit controls the display lamp on the storage unit to flash for a period of time;
the sensing monitoring unit continuously monitors the concentration of turbid liquid in the storage unit, the data collection and control unit controls the propeller, the lower outlet and the display lamp, and the above processes are repeated for a plurality of times until the required turbid liquid is obtained; in the whole process, the communication unit transmits the sensor data to the cloud platform in real time, and after the terminal logs in the cloud platform, a user can check the data and issue instructions, so that the access and remote monitoring and control of the Internet of things of the system are realized.
2. The apparatus for autonomously adjusting and stabilizing a turbid liquid in an output concentration range according to claim 1, wherein: the storage unit is a cylinder with a cover, the height of which is 1m and the diameter of which is 0.5m, and comprises an outer storage chamber and a primary storage chamber, and different connection and combination modes are adopted according to different purposes.
3. The apparatus for autonomously adjusting and stabilizing a turbid liquid in an output concentration range according to claim 1, wherein: four electrode interfaces are symmetrically distributed on the side wall of the barrel of the storage unit at intervals of 0.2m and 0.8m in height, the electrodes correspond to sensor numbers a-d, a primary storage chamber containing a lower outlet is arranged at the bottom of the barrel and connected with the barrel wall, turbidity electrodes are distributed in the center of the bottom and the primary storage chamber respectively, the electrodes correspond to sensor numbers e and f respectively, and a display lamp is arranged at the top of the barrel.
4. The apparatus for autonomously adjusting and stabilizing a turbid liquid in an output concentration range according to claim 1, wherein: the communication unit comprises two speed regulating motors and two transmission shafts which are arranged in transmission rods and are connected with two upper propellers and lower propellers which are opposite in installation direction, the transmission rods are connected to the speed regulating motors, and the speed regulating motors amplify electric signals through motor driving after receiving signals of the control unit so as to drive the upper propellers and the lower propellers to rotate.
5. The apparatus for autonomously adjusting and stabilizing a turbid liquid in an output concentration range according to claim 1, wherein: the sensing monitoring unit comprises six turbidity electrodes, the turbidity electrodes a-d are respectively positioned at four electrode interfaces which are distributed at the heights of 0.2m and 0.8m at intervals, the turbidity electrode e is positioned at the center of the bottom of the barrel, and the turbidity electrode f is positioned in the primary storage chamber.
6. The apparatus for autonomously adjusting and stabilizing a turbid liquid in an output concentration range according to claim 1, wherein: the specific specification of the turbidity electrode is that the diameter is 60mm, the length is 256mm, the power supply is powered by 220VAC, the concentration data of turbid liquid is collected through the PTU100 system, and the turbidity electrode is output to the data collection and control unit by using an MODBUS-RTU communication protocol through an RS485 signal.
7. The apparatus for autonomously adjusting and stabilizing a turbid liquid in an output concentration range according to claim 1, wherein: the data collection and control unit is positioned above the drum, the singlechip STM32VET6 is used as a main control MCU for signal input and output, the six turbidity electrodes are processed by the PTU100 system and then output RS485 signals, the signals are converted into RS232 signals through a circuit, the signals are collected and preprocessed by the main control MCU, and a fuzzy PID algorithm is mainly adopted for processing the concentration signals.
8. The apparatus for autonomously adjusting and stabilizing a turbid liquid in an output concentration range according to claim 1, wherein: the output interface of the data collection and control unit is connected with the motor drive of the motor for controlling the outlet below the primary storage chamber, the display lamp and the propeller connected with the transmission rod respectively;
after the PTU100 system collects the signal of the concentration of the primary storage chamber monitored by the sensor f, the singlechip STM32VET6 is used as a main control MCU to control the L298N motor driving chip by receiving and outputting the electric signal, so as to control a single steering engine to turn on and turn off, if the concentration of the primary storage chamber reaches the standard, the lower outlet is controlled to be opened, the target turbid liquid is output, and if the concentration of the primary storage chamber does not reach the standard, the lower outlet is not opened;
when the concentration of the sensors a-e is not in the preset turbid liquid concentration range after long-time monitoring, or the concentration of the sensor a-e is not changed to the preset turbid liquid concentration range after 60s correction is started, or the turbid liquid concentration change exceeds the controllable range of the preset curve, the display lamp is controlled to turn on the red lamp and flash for a period of time;
when the sensors a-e continuously monitor whether the concentration of turbid liquid is consistent, if the a, c side (or b, d side) is obviously larger than the b, d side (or a, c side), the main control MCU controls the rotation direction of the stirrer to be reversed, and then the stirrer is reversed again; if the monitoring concentration of the sensors c, d and e affected by the precipitation is obviously greater than the concentration of turbid liquid monitored by the sensors a and b, the control unit controls the blades at the bottom of the stirrer to turn, and the rotation of the blades at the lower parts of the first transmission rod and the second transmission shaft is stopped; if the suspension phenomenon affects, the concentration of turbid liquid monitored by the sensors a and b is obviously larger than that monitored by the sensors c, d and e, and the control unit simultaneously controls the upper fan blade and the lower fan blade to increase the rotating speed of the rotating rod.
9. The apparatus for autonomously adjusting and stabilizing a turbid liquid in an output concentration range according to claim 1, wherein: the power supply unit performs voltage reduction, rectification, filtering and voltage stabilization treatment on an external power supply so as to provide direct current for each unit of the device, and the device comprises a direct current power supply circuit and a power plug connected with the external power supply.
10. The apparatus for autonomously adjusting and stabilizing a turbid liquid in an output concentration range according to claim 1, wherein: the communication unit adopts an ESP8266 module to be connected with the Bafa cloud platform for information input and output, adopts a TCP protocol to support a publish-subscribe mode, transmits real-time data of the sensor to the cloud server, receives data sent to the cloud server by An Zhuoduan APP in real time, and then transmits the data to the main control MCU to control the corresponding actuator, so that remote monitoring and control of a user are realized.
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