CN113210348B - Ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement - Google Patents
Ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement Download PDFInfo
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Abstract
The invention relates to an ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement. The ultrasonic energy converter driven by the ultrasonic power supply is used as a power device, ultrasonic waves are generated to the pipeline, and a cavitation effect, a high-speed micro-vortex effect and a shearing effect are generated in the pipeline and a liquid medium in the pipeline, so that the working efficiency is improved, the cleaning cost is reduced and the environmental pollution is reduced compared with the traditional high-pressure water gun washing, manual cleaning and chemical reagent cleaning; the invention takes the infrared array temperature measuring sensor as the input end for feeding back the cleaning effect, and compared with the common ultrasonic descaling equipment, the invention has the effects of monitoring the descaling effect in real time and checking the cleaning effect without stopping production and disassembling the pipeline; the invention combines the pipeline temperature information provided by the infrared array temperature measurement sensor to adjust the working power of the transducer in real time, and has the effects of saving energy consumption, prolonging the service life of cleaning equipment and the like compared with common ultrasonic equipment.
Description
Technical Field
The invention relates to an infrared array temperature measurement and ultrasonic descaling and antiscaling technology, in particular to an ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement, which is used for descaling pipelines of food and beverage processing production lines.
Background
Ultrasonic waves generally refer to sound waves that exceed the upper limit of human hearing, and exhibit a certain regularity when propagating in a medium, forming a field of a certain size and shape. Ultrasonic waves carry energy by themselves, generate large power, and cause a medium to vibrate at a very high speed when the ultrasonic waves propagate in liquid or solid, so that a series of effects are generated in a propagation medium or at a boundary of the medium. The effects comprise cavitation effect and activation effect in liquid, high-speed micro-vortex effect on a contact surface of the liquid and a solid, shearing effect between solid interfaces, molecular high-frequency vibration of a solid surface and solid surface reflection, and can be used for ultrasonic pipeline descaling and scale prevention.
Food and beverage processing line uses metal pipeline transportation beverage liquid, receives the difference in temperature change and frictional force to hinder the influence, and the inside dirt matter that accumulates easily in long-time use of pipeline influences the pipeline and effectively uses the cross-section, pollutes the transportation liquid. The traditional descaling method for the pipeline of the food and beverage processing production line generally has the three problems of complicated descaling process, difficulty in observing the descaling effect and difficulty in improving the descaling and antiscaling efficiency. In terms of complicated descaling process, the commonly used method for treating the pipeline dirt comprises manual wiping, high-pressure water gun flushing, chemical cleaning and the like. These methods tend to be time consuming, require additional preparation of large volumes of water or cleaning solution, and require draining or disposal of the used cleaning solution after the pipeline cleaning is complete. The descaling effect of the pipeline of the traditional food and beverage processing production line is also difficult to observe, most production lines do not have corresponding detection equipment to observe the descaling result, manual inspection is basically relied on, namely, the running pipeline is closed, and the residual condition of the internal dirt is observed after overhauling. On one hand, the normal operation of the equipment is interfered, on the other hand, the inspection efficiency is low, and the operation management cost and the staff training and overhauling cost of the equipment are increased. In addition, the descaling and scale prevention efficiency of the traditional method is difficult to improve. Under the condition that the descaling effect cannot be observed in real time and online descaling cannot be realized, all cleaning work can be carried out only on the occasion that equipment is shut down, so that the cleaning and overhauling period exists. Each service cycle requires repeated disassembly of the pipeline and physical or chemical cleaning processes. The more frequent the cleaning cycle, the greater the degree of disturbance to normal operation. In addition, each cleaning process is a temporary treatment of the dirt, and the generation of the dirt cannot be fundamentally prevented.
The ultrasonic descaling technology is just suitable for solving the modern technical means of cleaning and keeping the food and beverage processing production line pipeline clean, and has the advantages of high efficiency, low cost, good effect, environmental protection, no pollution and the like compared with the traditional physical and chemical cleaning method. The scale on the inner wall of the pipeline is removed by generating a cavitation effect, forming local high-speed micro-vortex and utilizing the shearing effect of the contact surface of the liquid and the pipeline. Meanwhile, by means of the infrared array sensor which is not in physical contact with a pipeline target, the scaling condition in the pipeline is detected in real time under the condition that the pipeline is not detached, and continuous operation of pipeline equipment is guaranteed. In addition, the output power of the ultrasonic transducer can be controlled according to the thickness change of the scale layer, the energy consumption is reduced, and the working efficiency of the ultrasonic equipment is further improved.
The selection of a proper descaling effect detection scheme is also an important ring for cleaning the pipeline of the food and beverage processing production line. The existing project adopting ultrasonic pipeline descaling equipment is used for evaluating the descaling effect, most projects adopt the mode of detecting the cleaning effect and then do not need frequent inspection, and only the ultrasonic equipment is started periodically for cleaning. And part of engineering projects can indirectly evaluate the descaling effect in the modes of sampling and inspecting product components or weighing sample quality and the like, and the design of assisting ultrasonic measurement to estimate the thickness of scale in the pipeline by combining liquid flow and inlet and outlet temperature difference and adjusting the working power of the ultrasonic transducer according to the design. In order to efficiently clean the scale of the pipeline, further master the actual operation condition of pipeline equipment, reduce the detection cost of the pipeline, reduce the complexity of the system, avoid changing the original state of the pipeline and improve the operation efficiency of an ultrasonic scale removal system, under the premise that an ultrasonic power supply is selected to drive an energy converter arranged on the outer wall of the pipeline as a pipeline cleaning and cleaning method, the invention provides an infrared array temperature measuring sensor, and by a non-contact method, the scale deposit condition of the pipeline is conjectured by measuring the temperature change of a transport liquid medium reflected by an outer pipeline and combining the physical parameters of the pipeline and the environmental temperature, the original state of the pipeline is not influenced as much as possible, the scale removal performance of the ultrasonic pipeline is indirectly obtained at lower cost, the working power of the ultrasonic energy converter is controlled according to actual needs, and the service lives of the ultrasonic power supply and the energy converter are prolonged.
The existing ultrasonic descaling method for judging pipeline scaling based on temperature detection is mainly used for industrial heat exchange pipelines, and generally combines detection of inlet temperature difference, pipeline flow and ultrasonic measurement of scale layer thickness to judge scaling conditions in pipelines. Compared with the common industrial heat exchange pipeline, the food and beverage processing production line requires to ensure the sanitation of the transported liquid, so that the direct contact between the sensor and the transported liquid is avoided as much as possible. Meanwhile, the pipeline for the food and beverage processing production line has a single-layer pipeline structure for transporting high-temperature liquid, the temperature of the outer pipeline is greatly directly influenced by the temperature of the liquid, the temperature distribution condition of the whole section of pipeline can be directly measured, and the detection of the temperature difference between an inlet and an outlet is more convenient and accurate than the detection of the temperature difference between the inlet and the outlet respectively.
Disclosure of Invention
The invention aims to solve the three problems that the existing food and beverage processing production line has a complex pipeline descaling process, the descaling effect is not easy to observe, and the descaling and antiscaling efficiency is difficult to improve, and provides an ultrasonic descaling and antiscaling system based on infrared array temperature measurement.
The ultrasonic energy converter driven by an ultrasonic power supply is used as a power device, ultrasonic waves are generated to the pipeline, and a cavitation effect, a high-speed micro-vortex effect and a shearing effect are generated in the pipeline and a liquid medium in the pipeline, so that the working efficiency is improved, the cleaning cost is reduced and the environmental pollution is reduced compared with the traditional high-pressure water gun washing, manual cleaning and chemical reagent cleaning; the invention takes the infrared array temperature measuring sensor as the input end for feeding back the cleaning effect, and compared with the common ultrasonic descaling equipment, the invention has the effects of monitoring the descaling effect in real time and checking the cleaning effect without stopping production and disassembling a pipeline; the invention combines the pipeline temperature information provided by the infrared array temperature measurement sensor to adjust the working power of the transducer in real time, and has the effects of saving energy consumption, prolonging the service life of cleaning equipment and the like compared with common ultrasonic equipment; the sensor only uses the infrared array temperature measurement sensor to obtain the pipeline temperature information for adjusting the power of the ultrasonic equipment, and has the advantages that the pipeline of a production line is less modified than the pipeline of the ultrasonic equipment which obtains a feedback adjustment signal by a flow or contact temperature measurement sensor, the direct contact between the sensor and the transport liquid is avoided, the more comprehensive pipeline temperature distribution condition is obtained, and the like; the invention has self-protection capability, can monitor the conditions of self current, voltage, power and temperature in real time, and can timely carry out protection actions on the conditions of overcurrent, overvoltage, overpower and overtemperature.
The technical scheme provided by the invention is as follows:
the whole system consists of six parts: 1. a control section composed of an ASIC chip and necessary peripheral circuits; 2. the power part consists of an ultrasonic power supply and an ultrasonic transducer; 3. a sensor part determined by the infrared array temperature measurement sensor; 4. an intelligent recognition part composed of a software algorithm for signal processing; 5. a protection part consisting of a sampling circuit and an alarm circuit; 6. and the interactive part consists of a display and a keyboard.
The control part controls the whole system to work, and comprises the steps of receiving a temperature feedback signal, adjusting power output, judging an alarm condition, making a response and the like. The power part transmits energy to pipeline equipment to be cleaned in an ultrasonic mode, and a series of physical effects are generated on the pipeline wall and a liquid medium through ultrasonic waves, so that the purposes of preventing and removing scale are achieved. The infrared array temperature measuring sensor of the sensor part detects the temperature of the pipeline and the environment and provides calculation parameters for the intelligent identification part. The intelligent identification part collects temperature information input by the sensor part, calculates the current scaling condition in the pipeline by combining set pipeline physical parameters and conversion coefficients, takes the obtained ratio of the thickness of the scale layer to the inner diameter of the pipeline as a feedback signal, and adjusts the output parameters of the power part to meet the current pipeline cleaning requirement. The protection part acquires voltage and current signals of the ultrasonic power supply and the transducer through the sampling circuit, acquires the temperature of piezoelectric ceramics of the transducer through the infrared array temperature measuring sensor, monitors the conditions of overcurrent of an inverter circuit of the ultrasonic power supply and overvoltage, overpower and overtemperature of the transducer, and gives an alarm when abnormal conditions occur. The protection part sends the electric signal and the temperature feedback information to the control part, and the control part performs corresponding protection actions to ensure the safe operation of the whole system. All information is displayed on the display and the operator sets parameters and thresholds for the relevant calculations and alarms by means of the keyboard.
Preferably, the system is formed into a conceptual whole and can be separated in a physical layer, that is, the parts are not necessarily connected by wires and are not necessarily in the same working environment, the number of hardware and the software processing capacity are not limited explicitly, and the system can be configured according to the actual needs. For example, a small number of ultrasonic transducers and a part of infrared array temperature measurement sensor units can be arranged at key points of a section of pipeline, a software algorithm is integrated into a control chip circuit attached to an ultrasonic power supply, and the pipeline cleaning condition is displayed through a display or a nixie tube in a field working mode; ultrasonic transducers and infrared array temperature measuring sensors can be arranged in a pipeline area in a large quantity, collected information is transmitted to a remote processing server in a wireless mode, the scale layer forming condition of each area is calculated based on the temperature distribution of the pipeline, and transducers in different areas are controlled to make corresponding power adjustment.
Preferably, the system functions are formed into a control closed loop by all parts on the basis of completing independent tasks, and information is transmitted among the parts, so that the system is ensured to be continuously adapted to specific environmental changes.
Furthermore, an ASIC chip of the control part obtains a power supply through a peripheral circuit, receives a temperature feedback signal and provides physical support for the intelligent identification part so as to calculate a result and control the output of the power part; and receiving feedback signals of each sampling circuit, judging alarm conditions, and adjusting the output of the power part according to various conditions.
Furthermore, an ultrasonic power supply of the power part provides electric energy and driving signals for the ultrasonic transducer, direct current formed by rectifying and filtering commercial power is converted into high-frequency alternating current through an inverter circuit as required, and the ultrasonic transducer is excited to work through a transformer and a matching network. The current and voltage signals collected from the transducer are used to adjust the transducer operating frequency to ensure that the transducer operates at the resonant frequency point.
Furthermore, the ultrasonic transducer of the power part is vertically arranged on the surface of the pipeline, high-frequency sound waves are converted into mechanical vibration of the pipeline through a waveguide or a sound-transmitting material, an ultrasonic field with a certain shape is formed in the pipeline, a cavitation effect, a high-speed micro-vortex effect, a shearing effect and the like are generated, and the formed dirt is effectively prevented from being formed or removed by reducing the volume of a crystalline nucleus forming product and destroying a dirt structure.
Furthermore, the infrared array temperature measuring sensor of the sensor part takes the temperature of the outer pipeline as a main index and judges the cleanness degree of the pipeline by combining the environmental temperature. The material of the pipeline is basically metal or alloy, and generally has good heat conductivity and heat conductivity. When liquid with a certain temperature flows through the pipeline, the outer side wall of the pipeline can be gradually heated. The temperature reflected by the outer pipe is often lower than the actual liquid temperature due to the influence of ambient temperature and fouling in the pipe. According to the temperature change of the outer pipeline, the thickness of the scale deposit in the pipeline can be indirectly judged by combining the environmental temperature and the physical size of the pipeline. The non-contact detection method can also avoid refitting the target pipeline and reduce the installation cost. The infrared array temperature measuring sensor is a sensor array formed by a series of single thermopile infrared sensors according to a certain arrangement sequence, and detects temperature information of environment and objects through infrared radiation. Compared with a single-point infrared sensor, the infrared array temperature measuring sensor can obtain the information such as the highest temperature or the average temperature by fully utilizing the temperature information of the measured object in the visual field range, the detection range is wider, and the measurement accuracy is higher. In addition, a single infrared array temperature measurement sensor can detect the temperature of the environment and the temperature of the target object at the same time, the deployment is simple, and the object temperature detection and the environment temperature detection sensor do not need to be additionally distinguished. And finally, the infrared array temperature measurement sensor presents the temperature distribution of the object in a thermal imaging mode instead of a digital mode, so that the result is more visual, and the observation of an operator is facilitated.
The infrared array temperature measurement sensor sends the collected temperature information to the control part, and the temperature information is processed by the intelligent identification part.
Furthermore, the intelligent identification part comprises the following steps of calculating the thickness of the scale layer and adjusting the power of the transducer:
when high temperature liquid flows through the pipe, heat will be conducted from the liquid to the pipe, since the pipe temperature is lower than the liquid temperature, causing the pipe temperature to rise. When the scale layer exists in the pipeline, the heat conduction coefficient of the scale layer is lower than that of metal, namely, the heat transfer speed is slow, and the scale layer absorbs heat energy, so that the temperature on the surface of the pipeline is finally reflected to be lower than the condition without the scale layer. In addition, the measured temperature of the pipe is also influenced by the ambient temperature, which should be taken into account during the measurement.
The average liquid temperature is T when the pipeline is clean 1 And the temperature of the outer pipeline measured by the infrared array sensor in the standard environment temperature T is displayed as T 2 。
The two are in linear relation and the liquid temperature coefficient of conductivity is k 1 Then, there are:
T 2 ＝k 1 T 1
coefficient of conductivity k at liquid temperature 1 Should be less than 1, meaning that the pipe temperature results from liquid temperature conduction and there is always a loss of thermal energy. Where k is 1 The value is 0.9.
And then the influence of the ambient temperature is taken into account. Let the ambient temperature in the field be T 0 The ambient temperature conversion coefficient is k 0 . The higher the temperature of the field environmentThe pipe temperature shows a higher temperature than that in the standard temperature state due to the influence of the ambient temperature, and vice versa. The prior art is as follows:
T 2 ＝k 1 T 1 +k 0 (T 0 -T)
because the heat conduction capability of air is lower than that of metal, the ambient temperature conversion coefficient is reflected to be weak in the temperature change degree of the outer pipeline, and k is 0 The value should be less than k 1 . Where k is 0 The value is 0.1.
The scale addition layer now has an effect on the outer pipe temperature. Because the heat conduction capability of the scale layer is smaller than that of metal, the scale layer on the inner wall of the pipeline hinders the normal heat conduction of the pipeline, and the scale layer has certain heat absorption and heat storage capabilities, so that the external temperature of the pipeline is lower than a clean state, and the liquid temperature conduction coefficient k is equivalently reduced 1 . Assuming that the scale layer composition is stable, the thermal conductivity of the scale layer is affected only by thickness, and the effect of the scale layer thickness on the outer wall temperature is reflected as a linear relationship, then:
T 2 ＝(k 1 -dη)T 1 +k 0 (T 0 -T)
where d is the average scale layer thickness and η is the scale layer effect coefficient. It is readily known that when the value of d is zero, i.e. no scale layer is formed, the liquid temperature has a coefficient of conduction k through the liquid temperature 1 Reflected to the outer pipe. If the scale layer is thicker, the liquid receiving temperature of the outer pipeline is lower. The average scale layer thickness d is taken here in mm.
The scale layer influence coefficient η reflects the sensitivity of the liquid temperature to the outward radiation to the change of the scale layer thickness. If the pipe wall is thin, the degree of outward radiation of the liquid temperature is obviously influenced by the thickness change of the scale layer, and the scale layer influence coefficient eta is large; if the tube wall is thicker, the degree of outward radiation of the liquid temperature is slightly influenced by the thickness change of the scale layer, and the scale layer influence coefficient eta is smaller. The thickness of the pipe wall is measured by the inner diameter and the outer diameter of the pipe. Let the outer diameter of the pipeline be D 1 Inner diameter of D 2 (ii) a The wall thickness transformation coefficient of the pipe is k d And k is d Should satisfy when the average scale layer thickness D is taken as D 2 When/2 is k 1 = d η. Comprises the following steps:
here, the inner and outer diameters D of the pipeline are taken 1 、D 2 Unit is mm, wall thickness conversion coefficient k d Is 500. Wherein the coefficient of wall thickness transformation k d Determination of the reference liquid temperature conductivity k, as described above 1 And the inner and outer diameters of the pipe.
Thus, with a constant liquid temperature, the outside temperature of the pipe is determined primarily by the average scale layer thickness and the ambient temperature, and is affected by the inside and outside diameter of the pipe. The infrared array sensor can measure the temperature T of the outer pipeline 2 And the ambient temperature T 0 (ii) a Temperature T of liquid 1 Is a constant quantity, and the standard ambient temperature T is a manually selected reference ambient temperature; ambient temperature conversion coefficient k 0 And liquid temperature conductivity coefficient k 1 The coefficient can be measured from a clean pipe at standard ambient temperature; scale influence coefficient eta or pipe wall thickness conversion coefficient k d Can be determined by the inner and outer diameters of the pipeline and the selected liquid temperature conduction coefficient k 1 And (6) obtaining. Therefore, when at T 0 At an ambient temperature of D is the inner and outer diameters 2 、D 1 Metal pipeline transportation of (T) 1 When the temperature of the liquid is T, if the temperature of the outer pipeline is measured 2 The average scale layer thickness in the pipeline is known as follows:
assuming that the conversion coefficient between the inner diameter and the outer diameter of the pipeline and the wall thickness of the pipeline is constant, the formula is simplified as follows:
when the transducer works at rated power or more, the piezoelectric ceramic piece of the transducer generates heat seriously. The long-time working state at or above the rated power is easy to reduce the service life of the transducer and increase the damage probability of the transducer, so that the proper working power of the transducer needs to be set according to the possible influence of the fouling on the pipeline.
And comparing the obtained average scale layer thickness with the inner diameter of the pipeline, and setting the scale layer influence coefficient to be K to reflect the influence degree of scaling on the pipeline. Comprises the following steps:
the larger the fouling influence coefficient K is, the more serious the fouling is, and the larger the possibility of influencing the liquid transportation and pollution of the pipeline is. The infrared array temperature measuring sensor continuously monitors the temperature change condition of the pipeline and timely adjusts the power output of the transducer. In order to meet the requirements of scale removal and scale prevention simultaneously and ensure that the power output of the transducer is not too large, a scale layer influence coefficient K is used as an adjustment index, and when K < =3%, the transducer is kept to work at 20% of rated power in order to meet the requirement of scale prevention; when K >3%, the transducer power increases linearly: and the output power of the transducer is increased by 8.7 percent for every 1 percent increase of the K value. When the P value is greater than 80% of the rated power, the P value is limited to 80%.
Further, the protection part comprises a sampling circuit and an alarm circuit. The sampling circuit is divided into an inverter circuit sampling circuit and a transducer voltage and current sampling circuit, and respectively collects current signals of the inverter circuit of the ultrasonic power supply and voltage and current signals at two ends of the transducer, so that overlarge current or voltage is prevented from occurring. Voltage and current signals acquired by the sampling circuit and transducer temperature signals provided by the infrared array temperature measuring sensor are sent to the control part, the intelligent identification part calculates transducer power, and the control part makes a protection response when each signal exceeds a certain threshold value; the alarm circuit consists of a buzzer and LED lamp beads, and gives out sound and light alarm when any one of the conditions of overcurrent, overvoltage, overpower and overtemperature occurs.
The metal oxide semiconductor switching tube is a key element of the inverter circuit and has maximum current limitation, so the inverter circuit needs to limit current. The piezoelectric ceramic of the transducer is the key to converting electrical and mechanical energy, and the maximum withstand voltage is related to the thickness, and overvoltage is easy to damage the ceramic wafer, so the voltage must be limited. When the transducer works, the temperature of the piezoelectric ceramic rises gradually, the ceramic wafer is easy to damage due to overhigh temperature, and the temperature is quickly raised due to overhigh power, so that the power of the transducer is limited and the temperature of the transducer is monitored.
The inverter circuit sampling circuit collects the current value in the inverter circuit through the current transformer. The transducer voltage and current sampling circuit collects voltage and current values at two ends of the transducer through a divider resistor and an optocoupler and sends the voltage and current values to the control part to calculate the power of the transducer. The infrared array temperature measuring sensor detects the temperature of the transducer in the visual field range when the transducer works and sends the temperature to the control part for temperature monitoring.
When the current value of the inverter circuit exceeds 80% of the current threshold value, the protection circuit gives an alarm, and the control part turns off the switch tube forming the inverter circuit to prevent the switch tube from being burnt. When the voltage across the transducer exceeds 80% of the voltage threshold, or the transducer power exceeds 80% of the power threshold, or the transducer temperature exceeds 80% of the temperature threshold, the protection circuit alarms, and the output power of the transducer is reduced by the control part. The reduction mode is that the voltage, the power or the temperature is greater than 80% of each threshold value, and the power output is reduced by 1% every second until all the voltage, the power and the temperature indexes are recovered to the normal state.
Further, the interactive part is composed of a display screen and a keyboard. The display screen displays a thermal imaging image of the target pipeline acquired by the infrared array temperature measuring sensor and displays corresponding temperature data. When overcurrent, overvoltage, overpower and overtemperature alarm occurs, the display screen displays specific alarm information. The operator inputs the physical parameters of the pipeline and the over-current, over-voltage, over-power and over-temperature alarm thresholds required by calculating the thickness of the scale layer through a keyboard.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
compared with the traditional food and beverage processing production line pipeline cleaning mode, the ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement has the advantages of high efficiency, low cost, long acting time and good cleaning effect;
compared with general ultrasonic descaling equipment, the ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement can timely and accurately reflect the cleaning effect, can continuously monitor online, does not need to be shut down or disassembled for inspection, and improves the efficiency of ultrasonic descaling and antiscaling;
compared with general ultrasonic descaling equipment, the ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement forms a system control closed loop, a complete control strategy is established from power output, signal acquisition, signal processing to adjustment output, the power output of the ultrasonic equipment is adjusted according to actual needs, energy consumption is reduced, the service efficiency of the system can be effectively improved, and the service life of the ultrasonic equipment is prolonged;
compared with the common ultrasonic descaling equipment with feedback, the ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement only uses the infrared array temperature measurement sensor as the feedback signal acquisition sensor, is not in physical contact with a detection target, does not influence the original state of a pipeline, and is convenient and fast to install;
compared with the common ultrasonic descaling equipment with feedback, the ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement provided by the invention monitors the circuit operation state through various circuit signals, can quickly react when overcurrent, overvoltage, overpower and overtemperature occur, and protects the safe operation of an ultrasonic system.
Drawings
FIG. 1 is a schematic working diagram of an intelligent ultrasonic online descaling and antiscaling system based on infrared array temperature measurement according to the present invention;
FIG. 2 is a system block diagram of an ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement according to the present invention;
FIG. 3 is a working flow chart of an ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement according to the present invention;
FIG. 4 is a flow chart of the calculation of the scale deposit thickness and the adjustment of the power of a transducer of the intelligent ultrasonic online scale removal and prevention system based on infrared array temperature measurement;
FIG. 5 is a flow chart of the protection and alarm work of the intelligent ultrasonic online descaling and antiscaling system based on infrared array temperature measurement;
FIG. 6 is a schematic diagram of the actual installation of an ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement.
Detailed Description
The present invention will be described in detail with reference to examples for further illustrating the contents of the present invention.
The working schematic diagram of the ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement is shown in fig. 1 and 6, and comprises the following contents:
an ASIC chip of the control part and a peripheral circuit thereof control an inverter circuit of the ultrasonic power supply to generate a high-frequency driving signal, convert direct current into alternating current and transmit the alternating current to a transducer matching network through a transformer; the ultrasonic power supply drives the transducer to work and collects voltage and current signals of the transducer to ensure that the transducer works at a resonance point; the transducer is vertically arranged on the surface of the pipeline, transmits ultrasonic waves, and removes the scale layer on the inner wall of the pipeline by the cavitation effect, the high-speed micro-vortex effect and the shearing effect which are made of the ultrasonic waves; the infrared array temperature measuring sensor detects the temperature of the outer pipeline and the ambient temperature as the input of the intelligent identification part; the intelligent identification part calculates the thickness of a scale layer and selects the power output of the transducer according to the proportional relation between the thickness and the diameter of the inner pipeline; the ASIC chip controls the power output of the ultrasonic power supply according to the power adjustment result obtained by the intelligent identification part through a peripheral circuit; the protection circuit collects the electric signals of the ultrasonic power supply and the transducer, and the infrared array temperature measurement sensor detects the temperature of the transducer and sends the temperature to the control part for protection judgment; the ASIC chip of the control part receives the electric signal and the temperature feedback signal, judges whether the protection condition is achieved, and controls the ultrasonic power supply to do corresponding protection action through the peripheral circuit.
The invention relates to a system block diagram of an ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement, which is shown in figure 2 and comprises the following parts:
1. control section
The control part is composed of an ASIC chip and peripheral circuits thereof. The ASIC chip is powered by a peripheral circuit, obtains temperature feedback and sampling circuit feedback signals through the conversion of the peripheral circuit, runs an algorithm of an intelligent identification part, calculates the thickness of a scale layer or judges an alarm condition, and sends a power adjustment signal to a power part.
2. Power section
The power part consists of an ultrasonic power supply and an ultrasonic transducer. The ultrasonic power supply provides electric energy and driving signals required by the ultrasonic transducer, direct current formed after rectification and filtering of commercial power is converted into high-frequency alternating current through an inverter circuit as required, and the ultrasonic transducer is excited to work through a transformer and a matching network. The current and voltage signals collected from the transducer are used to adjust the transducer operating frequency to ensure that the transducer operates at the resonant frequency point. The ultrasonic transducer is vertically or obliquely arranged on the surface of the pipeline, converts high-frequency sound waves into mechanical vibration of the pipeline through a waveguide or a sound-transmitting material, forms an ultrasonic field with a certain shape in the pipeline, generates a cavitation effect, a high-speed micro-vortex effect, a shearing effect and the like, and effectively prevents dirt from forming or removes formed dirt by reducing the volume of a crystal nucleus forming product and destroying a dirt structure.
3. Sensor part
The sensor part consists of an infrared array temperature measurement sensor. The infrared array temperature measuring sensor judges the cleanliness of dirt by detecting the temperature of an outer pipeline and the ambient temperature and combining the physical size of the pipeline and a preset conversion coefficient, thereby avoiding the direct contact of the sensor and the transported liquid and also being capable of obtaining more comprehensive pipeline temperature distribution conditions. The material of the pipeline is basically metal or alloy, and the pipeline has good heat conductivity and heat conductivity. When liquid with a certain temperature flows through the pipeline, the outer side wall of the pipeline is gradually heated. The normal heat conduction of the pipeline can be influenced when dirt exists on the inner wall of the pipeline, and the temperature outside the pipeline changes relatively slowly mainly due to the fact that the heat conduction coefficient of the pipeline is lower than that of metal. Thus, the thickness of the scale layer in the pipe can be estimated by measuring the outer pipe temperature.
Compared with a single-point infrared sensor, the infrared array temperature measuring sensor can obtain the information such as the highest temperature or the average temperature by fully utilizing the temperature information of the measured object in the visual field range, the detection range is wider, and the measurement accuracy is higher. In addition, a single infrared array temperature measuring sensor can detect the temperature of the environment and the temperature of the target object at the same time, the deployment is simple, and the object temperature detection and the environment temperature detection sensor do not need to be additionally distinguished. And finally, the infrared array temperature measurement sensor presents the temperature distribution of the object in a thermal imaging mode instead of a digital mode, so that the result is more visual, and the observation of an operator is facilitated. The infrared array temperature measurement sensor detects the temperature of the outer pipeline and the ambient temperature and sends the temperature and the ambient temperature to the intelligent identification part to calculate the thickness of the scale layer.
4. Intelligent recognition part
The intelligent identification part consists of two parts of scale deposit thickness calculation and energy converter power adjustment. The scale layer thickness is calculated by utilizing the temperature of the outer pipeline, combining the liquid temperature, the ambient temperature, the physical parameters of the pipeline and a preset conversion coefficient, and calculating the scaling condition in the pipeline. The calculation of the part needs to measure related conversion coefficients in advance through experiments, and the reliability of the calculation of the thickness of the scale deposit can be improved through accurate liquid temperature, environment temperature and physical parameters of the pipeline. For at T 0 At ambient temperature and has an inside and outside diameter of D 2 、D 1 Metal pipeline transportation T 1 In the case of temperature liquid, if the measured temperature of the outer pipeline is T 2 Setting the temperature conductivity k of the liquid 1 Is 0.9, and has an ambient temperature conversion coefficient k 0 0.1, the coefficient of wall thickness transformation k d And 500, calculating the average scale deposit thickness in the pipeline as follows:
the transducer power adjustment is to adjust the transducer power output in time according to the scale layer thickness calculation result, and process the scale layer with the corresponding thickness by a proper power value.
Comparing the average scale layer thickness obtained in the calculation of the scale layer thickness with the inner diameter of the pipeline, and determining the influence coefficient of the scale layer
The coefficient reflects the severe scale of the pipelineAnd (4) degree. The cleaning time of the area with thick scale should be prolonged, the power of the energy converter is increased, and the cleaning effect is ensured; areas with less fouling should have shorter cleaning times and lower transducer power to reduce energy losses and extend cleaning equipment life. In order to meet the requirements of scale removal and scale prevention and ensure that the power output of the transducer is not too large, the influence coefficient K of a scale layer is taken as an adjustment index, and when K is<=3%, in order to meet the anti-scaling requirement, the transducer is kept to work at 20% of rated power; when K is>3%, transducer power increases linearly: and the output power of the transducer is increased by 8.7 percent for every 1 percent increase of the K value. When the P value is greater than 80% of the rated power, the P value is limited to 80%.
5. Protective part
The protection part consists of a sampling circuit and an alarm circuit. The sampling circuit is divided into an inverter circuit sampling circuit and a transducer voltage and current sampling circuit, and respectively collects current signals of the inverter circuit of the ultrasonic power supply and voltage and current signals at two ends of the transducer, so that overlarge current or voltage is prevented from occurring. Voltage and current signals acquired by the sampling circuit and transducer temperature signals provided by the infrared array temperature measuring sensor are sent to the control part, the intelligent identification part calculates transducer power, and the control part makes a protection response when each signal exceeds a certain threshold value; the alarm circuit consists of a buzzer and LED lamp beads, and gives out sound and light alarm when any one of the conditions of overcurrent, overvoltage, overpower and overtemperature occurs.
When the current value of the inverter circuit exceeds 80% of the current threshold value, the protection circuit gives an alarm, and the control part turns off the switch tube forming the inverter circuit to prevent the switch tube from being burnt. When the voltage across the transducer exceeds 80% of the voltage threshold, or the transducer power exceeds 80% of the power threshold, or the transducer temperature exceeds 80% of the temperature threshold, the protection circuit alarms, and the control part reduces the output power of the transducer. The reduction mode is that the voltage, the power or the temperature is greater than 80% of each threshold value, and the power output is reduced by 1% every second until all the voltage, the power and the temperature indexes are recovered to the normal state.
6. Interaction part
The interactive part consists of a display and a keyboard. The ultrasonic descaling and antiscaling system displays a target pipeline and transducer thermal imaging image acquired by the infrared array sensor through the monitor display, and displays related physical quantities, such as information of the highest temperature, the temperature of a measurement center, the ambient temperature and the like; and acquiring physical parameters of the pipeline and over-current, over-voltage, over-power and over-temperature alarm thresholds required by calculating the thickness of the scale layer through a keyboard.
The invention relates to an ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement, which has a working flow chart shown in figure 3 and comprises the following steps:
1. parameter setting
And inputting various calculation parameters including standard environment temperature, actual liquid temperature, diameters inside and outside the pipeline, liquid temperature conversion coefficients, environment temperature conversion coefficients, pipe wall thickness conversion coefficients, various alarm thresholds and the like into the ultrasonic system through a keyboard.
2. Ultrasonic power supply operation
Standard commercial power is supplied to the ultrasonic power supply, and the control circuit, the protection circuit and the inverter circuit are started.
3. Operation of ultrasonic transducer
An inverter circuit of the ultrasonic power supply provides a driving signal and a power supply for the matched ultrasonic transducer through a transformer, the transducer converts electric energy into ultrasonic energy, the ultrasonic energy is conducted to a target pipeline, and a cavitation effect, a high-speed micro-eddy effect, a shearing effect and the like are generated. The voltage and current signals of the transducer circuit are collected to the control part, and the output frequency is adjusted by the ultrasonic power supply, so that the transducer is ensured to continuously work at a resonance frequency point.
4. Sensor detection
The infrared array temperature measurement sensor detects the temperature of the outer pipeline and the ambient temperature and sends the temperature to the intelligent identification part for calculation.
5. Thickness calculation of scale layer
The intelligent identification part calculates the thickness of the scale layer by utilizing the temperature of the outer pipeline and the ambient temperature acquired by the infrared array temperature measuring sensor and combining the preset standard ambient temperature, the actual liquid temperature, the internal and external diameters of the pipeline, the liquid temperature conversion coefficient, the ambient temperature conversion coefficient and the pipe wall thickness conversion coefficient. For inT 0 At an ambient temperature of D is the inner and outer diameters 2 、D 1 Metal pipeline transportation of (T) 1 In the case of temperature liquid, if the measured temperature of the outer pipeline is T 2 Setting the temperature conductivity k of the liquid 1 Is 0.9, and has an ambient temperature conversion coefficient k 0 0.1, the coefficient of wall thickness transformation k d And 500, calculating the average scale deposit thickness in the pipeline as follows:
6. transducer power adjustment
Comparing the average scale layer thickness obtained in the calculation of the scale layer thickness with the inner diameter of the pipeline, and determining the influence coefficient of the scale layer
In order to meet the requirements of scale removal and scale prevention and ensure that the power output of the transducer is not too large, the influence coefficient K of a scale layer is taken as an adjustment index, and when K is<=3%, in order to meet the anti-scaling requirement, the transducer is kept to work at 20% rated power; when K is>3%, transducer power increases linearly: and the output power of the transducer is increased by 8.7 percent for every 1 percent increase of the K value. When the P value is greater than 80% of the rated power, the P value is limited to 80%.
7. System protection
The sampling circuits of the protection part collect electric signals of the ultrasonic power supply and the transducer, and the electric signals and the temperature of the transducer detected by the infrared array temperature measurement sensor are used as feedback signals to be input into the control part. When the current value of the inverter circuit exceeds 80% of the current threshold value, the protection circuit gives an alarm, and the control part turns off the switching tube forming the inverter circuit to prevent the switching tube from being burnt. When the voltage across the transducer exceeds 80% of the voltage threshold, or the transducer power exceeds 80% of the power threshold, or the transducer temperature exceeds 80% of the temperature threshold, the protection circuit alarms, and the control part reduces the output power of the transducer. The reduction mode is that the voltage, the power or the temperature is greater than 80% of each threshold value, and the power output is reduced by 1% per second until the voltage, the power and the temperature indexes are all recovered to a normal state.
The invention relates to a flow chart for calculating the thickness of a scale layer and adjusting the power of a transducer of an ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement, which is shown in figure 4, and comprises the following steps:
1. before the ultrasonic power supply works, various calculation parameters including standard environment temperature, actual liquid temperature, the inner and outer diameters of a pipeline, a liquid temperature conversion coefficient, an environment temperature conversion coefficient, a pipe wall thickness conversion coefficient, various alarm threshold values and the like are set for an ultrasonic system through a keyboard;
2. the ultrasonic system starts to operate, the temperature of the outer pipeline and the ambient temperature are detected through the infrared array temperature measuring sensor, and the detected temperature is sent to the control part;
3. the thickness d of the scale layer is calculated. For at T 0 At ambient temperature and has an inside and outside diameter of D 2 、D 1 Metal pipeline transportation of (T) 1 In the case of temperature liquid, if the measured temperature of the outer pipeline is T 2 Setting the temperature conductivity k of the liquid 1 Is 0.9, and has an ambient temperature conversion coefficient k 0 0.1, the coefficient of wall thickness transformation k d Is a group of 500, and is,
4. calculating the influence coefficient K of the scale layer,
5. in order to meet the requirements of scale removal and scale prevention simultaneously and ensure that the power output of the transducer is not too large, a scale layer influence coefficient K is used as an adjustment index, and when K < =3%, the transducer is kept to work at 20% of rated power in order to meet the requirement of scale prevention; when K >3%, the transducer power increases linearly: and the output power of the transducer is increased by 8.7 percent for every 1 percent increase of the K value. When the P value is greater than 80% of the rated power, the P value is limited to 80%.
The protection and alarm work flow chart of the ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement is shown in FIG. 5, and comprises the following steps:
1. each sampling circuit collects current of the ultrasonic power supply inverter circuit and voltage current signals at two ends of the ultrasonic transducer through a current transformer, a divider resistor and an optical coupler;
2. the infrared array temperature measurement sensor detects the temperature of the transducer in a visual field range;
3. the control part receives the feedback signal and judges whether the protection condition occurs;
4. when the current value of the inverter circuit exceeds 80% of the current threshold value, the protection circuit gives an alarm, and the control part turns off a switching tube forming the inverter circuit to prevent the switching tube from being burnt;
5. when the voltage at the two ends of the transducer exceeds 80 percent of the voltage threshold value, or the power of the transducer exceeds 80 percent of the power threshold value, or the temperature of the transducer exceeds 80 percent of the temperature threshold value, the alarm circuit gives an alarm, and the control part reduces the output power of the transducer;
6. when the voltage, power or temperature is greater than 80% of the threshold value, the power output is reduced by 1% every second until the voltage, power and temperature indexes are all restored to the normal state.
Claims (9)
1. An ultrasonic online descaling and antiscaling intelligent system based on infrared array temperature measurement is characterized by comprising
The intelligent monitoring system comprises a control part consisting of an ASIC chip and a peripheral circuit, a power part consisting of an ultrasonic power supply and an ultrasonic transducer, a sensor part determined by an infrared array temperature measurement sensor, an intelligent identification part consisting of a software algorithm for signal processing, a protection part consisting of a sampling circuit and an alarm circuit and an interaction part consisting of a display and a keyboard;
the control part controls the whole system to work, and comprises receiving a temperature feedback signal, adjusting power output, judging an alarm condition and making a response;
the power part transmits energy to pipeline equipment to be cleaned in an ultrasonic mode, and a series of physical actions are generated on the pipeline wall and a liquid medium through ultrasonic waves, so that the purposes of preventing and removing scale are achieved;
the infrared array temperature measuring sensor of the sensor part detects the temperature of the pipeline and the environment and provides calculation parameters for the intelligent identification part;
the intelligent identification part acquires temperature information input by the sensor part, calculates the current scaling condition in the pipeline by combining set physical parameters and conversion coefficients of the pipeline, takes the obtained ratio of the thickness of a scale layer to the inner diameter of the pipeline as a feedback signal, and adjusts output parameters of the power part so as to be more suitable for the current pipeline cleaning requirement;
the protection part acquires voltage and current signals of an ultrasonic power supply and a transducer through a sampling circuit, acquires the temperature of piezoelectric ceramics of the transducer through an infrared array temperature measuring sensor, monitors the conditions of overcurrent of an inverter circuit of the ultrasonic power supply and overvoltage, overpower and overtemperature of the transducer, and gives an alarm when abnormal conditions occur; the protection part sends the electric signal and the temperature feedback information to the control part, and the control part performs corresponding protection actions to ensure the safe operation of the whole system;
the display of the interaction part displays all information, and an operator sets parameters and threshold values for related calculation and alarm through a keyboard;
the intelligent identification part comprises the following steps of calculating the thickness of a scale layer and adjusting the power of the transducer:
the average liquid temperature is T when the pipeline is clean 1 And the temperature of the outer pipeline measured by the infrared array sensor in the standard environment temperature T is displayed as T 2 ；
The two are in linear relation and the liquid temperature coefficient of conductivity is k 1 Then, there are:
T 2 ＝k 1 T 1
coefficient of conductivity k at liquid temperature 1 Should be less than 1, meaning that the pipe temperature results from liquid temperature conduction and there is always a loss of heat energy;
then the influence of the environmental temperature is brought into consideration, and the environmental temperature of the site is set as T 0 The ambient temperature conversion coefficient is k 0 (ii) a The higher the field environment temperature is, the more the pipeline temperature is affected by the environment temperature, exhibits a higher temperature than in the standard temperature regime, and vice versa; comprises the following steps:
T 2 ＝k 1 T 1 +k 0 (T 0 -T)
k 0 the value should be less than k 1 ；
Assuming that the scale layer composition is stable, the thermal conductivity of the scale layer is affected only by thickness, and the effect of the scale layer thickness on the outer wall temperature is reflected as a linear relationship, then:
T 2 ＝(k 1 -dη)T 1 +k 0 (T 0 -T)
wherein d is the average scale layer thickness and η is the scale layer influence coefficient;
when at T 0 At an ambient temperature of D is the inner and outer diameters 2 、D 1 Metal pipeline transportation T 1 When the temperature of the liquid is T, if the temperature of the outer pipeline is measured 2 The average scale layer thickness in the pipeline is known as follows:
wherein k is d The wall thickness transformation coefficient is obtained;
assuming that the conversion coefficient between the inner diameter and the outer diameter of the pipeline and the wall thickness of the pipeline is constant, the formula is simplified as follows:
comparing the obtained average scale layer thickness with the inner diameter of the pipeline, and setting the scale layer influence coefficient to be K to reflect the influence degree of scaling on the pipeline; comprises the following steps:
when K < =3%, in order to meet the anti-scaling requirement, the transducer is kept to work at 20% of rated power; when K >3%, the transducer power increases linearly: increasing the output power of the transducer by 8.7% when the K value is increased by 1%; when the P value is greater than 80% of the rated power, the P value is limited to 80%.
2. The intelligent ultrasonic online descaling and antiscaling system based on infrared array temperature measurement as claimed in claim 1, wherein a small number of ultrasonic transducers and a part of infrared array temperature measurement sensor units are arranged at key points of a section of pipeline, a software algorithm is integrated into a control chip circuit attached to an ultrasonic power supply, and the pipeline cleaning condition is displayed through a display or a nixie tube in a field working manner.
3. The intelligent ultrasonic online descaling and antiscaling system based on infrared array temperature measurement as claimed in claim 1, wherein a large number of ultrasonic transducers and infrared array temperature measurement sensors are arranged in a pipeline area, collected information is transmitted to a remote processing server in a wireless manner, scale formation conditions in each area are calculated based on pipeline temperature distribution, and transducers in different areas are controlled to make corresponding power adjustments.
4. The intelligent ultrasonic online descaling and antiscaling system based on infrared array temperature measurement as claimed in claim 1, wherein the ASIC chip of the control part obtains power supply via peripheral circuit, receives temperature feedback signal, provides physical support for the intelligent identification part, and controls the output of the power part with calculated result; and receiving feedback signals of each sampling circuit, judging alarm conditions, and adjusting the output of the power part according to various conditions.
5. The intelligent ultrasonic online descaling and antiscaling system based on infrared array temperature measurement as claimed in claim 1, wherein the ultrasonic power supply of the power part provides electric energy and driving signals for the ultrasonic transducer, and the direct current formed by rectifying and filtering the mains supply is converted into high-frequency alternating current through an inverter circuit as required, and the ultrasonic transducer is excited to operate through a transformer and a matching network; the current and voltage signals collected from the transducer can be used for adjusting the working frequency of the transducer to ensure that the transducer works at a resonance frequency point;
the ultrasonic transducer of the power part is vertically arranged on the surface of the pipeline, high-frequency sound waves are converted into mechanical vibration of the pipeline through a waveguide or a sound-transmitting material, an ultrasonic field with a certain shape is formed in the pipeline, a cavitation effect, a high-speed micro-vortex effect and a shearing effect are generated, and the formed dirt is effectively prevented from being formed or removed by reducing the volume of a crystalline nucleus forming product and destroying a dirt structure.
6. The intelligent ultrasonic online descaling and antiscaling system based on infrared array temperature measurement according to claim 1, wherein the infrared array temperature measurement sensor of the sensor part uses the temperature of an outer pipeline as a main index, and determines the degree of pipeline cleanliness by combining the ambient temperature, specifically, indirectly determines the thickness of a scale layer in the pipeline by combining the ambient temperature and the physical size of the pipeline according to the change of the temperature of the outer pipeline; the infrared array temperature measuring sensor is a sensor array formed by a series of single thermopile infrared sensors according to a certain arrangement sequence, and detects temperature information of an environment and an object through infrared radiation; the infrared array temperature measuring sensor sends the collected temperature information to the control part and the intelligent identification part processes the temperature information.
7. The intelligent ultrasonic online descaling and antiscaling system based on infrared array temperature measurement as claimed in claim 1, wherein the protection part comprises a sampling circuit and an alarm circuit; the sampling circuit is divided into an inverter circuit sampling circuit and a transducer voltage and current sampling circuit, and respectively collects current signals of the inverter circuit of the ultrasonic power supply and voltage and current signals at two ends of the transducer, so that overlarge current or voltage is prevented; voltage and current signals acquired by the sampling circuit and transducer temperature signals provided by the infrared array temperature measuring sensor are sent to the control part, the intelligent identification part calculates transducer power, and the control part makes a protection response when each signal exceeds a certain threshold value; the alarm circuit consists of a buzzer and LED lamp beads, and gives out sound and light alarm when any one of the conditions of overcurrent, overvoltage, overpower and overtemperature occurs.
8. The intelligent ultrasonic online descaling and antiscaling system based on infrared array temperature measurement according to claim 7, wherein the inverter circuit sampling circuit collects a current value in the inverter circuit through a current transformer; the transducer voltage and current sampling circuit collects voltage and current values at two ends of a transducer through a divider resistor and an optocoupler and sends the voltage and current values to a control part to calculate the power of the transducer; the infrared array temperature measuring sensor detects the temperature of the transducer in the visual field range when the transducer works and sends the temperature to the control part for temperature monitoring;
when the current value of the inverter circuit exceeds 80% of the current threshold value, the protection circuit gives an alarm, and the control part turns off a switching tube forming the inverter circuit to prevent the switching tube from being burnt; when the voltage at the two ends of the transducer exceeds 80 percent of the voltage threshold value, or the power of the transducer exceeds 80 percent of the power threshold value, or the temperature of the transducer exceeds 80 percent of the temperature threshold value, the protection circuit gives an alarm, and the control part reduces the output power of the transducer; the reduction mode is that the voltage, the power or the temperature is greater than 80% of each threshold value, and the power output is reduced by 1% every second until all the voltage, the power and the temperature indexes are recovered to the normal state.
9. The intelligent ultrasonic online descaling and antiscaling system based on infrared array temperature measurement as claimed in claim 1, wherein the interactive part is composed of a display screen and a keyboard; the display screen displays a thermal imaging image of the target pipeline acquired by the infrared array temperature measuring sensor and displays corresponding temperature data; when overcurrent, overvoltage, overpower and overtemperature alarm occurs, a display screen displays specific alarm information; the operator inputs the physical parameters of the pipeline and the over-current, over-voltage, over-power and over-temperature alarm thresholds required by calculating the thickness of the scale layer through a keyboard.
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