Yudian temperature control paperless recorder
Temperature control split type recorder is widely used in chemical, thermoelectric, petrochemical, pharmaceutical, metallurgy, low price, easy to use monitoring system combination products. Let the system combination and free control be in your hands, and it is convenient for the user to leave it to the manufacturer.
In particular, the oven heating control system consists of three parts: adjustment control, measurement recording, and power supply unit, temperature controller and nickel-chromium-nickel-nickel thermocouple, and AI artificial intelligence digital program adjustment for resistance furnace measurement and control. Completed in the small control cabinet with over-temperature protection output control AC contactor power-off, temperature control using phase-shifting trigger to control thyristor or zero-crossing trigger thyristor circuit and current transformer, terminal block and other electrical element. The temperature control instrument of the temperature controller selects the AI ​​artificial intelligence regulator. The thermocouple converts the temperature inside the furnace into a level signal. After the self-tuning of the single-chip control parameter in the temperature control instrument, the control outputs to the phase shifting module, and passes through the VR. The adjustment changes the magnitude of the phase shift angle to control the conduction angle of the thyristor to control the average heating power of the electric furnace. When the set temperature is approached, the intermittent heating in the furnace finally maintains the set temperature in the furnace. The constant temperature control is heated according to the setting program. The program is programmed according to the format of [temperature-time-temperature], and the temperature is kept constant during the constant temperature period. After entering the holding state, the temperature fluctuation is small; and various temperature controllers are provided. Available for selection;
Measurement records using split-type paperless recorder 1 can reduce visual and human error, greatly improve work efficiency; 2 with over-temperature alarm function record; improve safety and reliability; 3 with 50-section heating The program can set the heating process according to different experimental requirements. 4 The instrument with the communication function is quickly connected to the bus type paperless recorder. The 5AI split paperless recorder is the transformation and upgrading of the old products.
Third, temperature control split type paperless recorder application
1. Temperature recorder function The AI ​​temperature adjustment instrument of each heating furnace can be used by connecting RS485 communication line; the application is flexible: the temperature adjustment recorder can be connected 2, 4, 6, 8, 12, 16, 18, 22, 32 sets of AI temperature adjustment instruments; freely edit the AI ​​temperature adjustment instrument model on the recorder, write the heating device equipment number such as: [TIC-101]; the connected instrument type includes not only various temperature PID artificial intelligence adjustment, but also It can adjust the functions of pressure, flow and electricity; any combination of AI products can choose intelligent controller, hand-operator, single or multi-channel display alarm, flow totalizer or digital input and output module operation function;
Temperature regulation: Each heating furnace AI smart meter independently performs PID control function. Each AI adjustment and measurement unit can display the operation independently: measured value, set value, setting parameter, automatic manual bumpless switching, adjusting manual output value, In the digital paperless recorder, the program curve can be set, and the programmed program recipe is transmitted to the temperature control program instrument; the start/run/stop program; the thyristor shift trigger and the regulating valve of each electric heating furnace are precisely adjusted to control temperature. The system is scalable at any time.
Data Recording: Insert a USB flash drive into the temperature-regulated split paperless recorder, standard 2G, and record data for several years. AI split-type temperature-regulated paperless recorders continue to enhance the flexibility of their software and data storage functions to meet the needs of the field during the development process. The default automatic export U disk interval is 480 minutes (8 hours); the user can also set the export time interval as desired;
Users need to remove the U disk must click the [Save Now] button, all immediately transferred to the U disk. Real-time export data to U disk; U disk import Excel report with data format CSV, data backup to computer CSV Excel report directly open.
2, installation method AI split type paperless recorder is [host computer - true color man-machine interface touch screen] and [lower machine - AI temperature adjustment instrument]; [host computer - true color man-machine interface touch screen] using disk surface installation, [ Lower position machine - AI temperature adjustment instrument] Optional disk surface or rail mounting method. AI temperature adjustment instrument bus connection, arranged by address, AI instrument independent operation, mutual interference, power-on can display operation; touch screen COM1 communication port uses [Super Category 5 shielded twisted pair] 2 wires to connect the communication port of AI instrument A/B end; COM2 communication port has random printing function.
3, boot interface
The screen has: [data screen] [real-time curve bar graph] [flowchart] [history curve] quickly returns to the [instrument screen] channel of a single meter. Press [Previous] [Next] on the same page; also have [Report], [Alarm], [Instrument Settings], [Record, Export Settings] function to adjust the control instrument to use hyperbolic running mode during operation, real-time See the comparison between the measured value (PV) and the given value (SV), the upper and lower limits or positive and negative deviations, generate an alarm prompt text prompt, the field instrument module switch output connection protection chain function or alarm buzzer.
4, customized process flow chart - touch control motor start and stop [dry contact switch input, output]
The use of vivid graphic images to describe the on-site production process is the epitome of the entire industrial site. It is more than just a picture, with control buttons and live real-time data, allowing the operator to have very intuitive remote control. Software editing can also realize the function of soft PLC switching output, clock timing control and switching output counting function.
In the flow chart, the button is available: the control button is connected to the AI-3013D5 switch 8-way relay output module, the address is set to 33 (software has been customized), the switch button in the flow chart can control 4 motors to start and stop; connect AI -3011D5 switch 8 input dry contacts, address set to 37, display device operating status; click on the data frame in the flow chart such as: [TIC-101] will return to the [live screen] channel. Customized flow charts or other requirements can be tailored to customer requirements.
In the flow chart, the application of the inverter control loop: directly control the AI-3013D5 switch output module to control the [start and stop] of the inverter in the flow chart interface; the manual/automatic control instrument PID adjustment makes the inverter increase and decrease the speed control.
5, heating furnace adjustment instrument host model description
AI-808P function enhanced 30+20 segment program control artificial intelligence regulator;
AI-708P type 30+20 segment program control artificial intelligence regulator;
AI-518P 30-segment program artificial intelligence thermostat;
AI-808 function enhanced artificial intelligence regulator (0.1 level accuracy / manual output / external reference / valve servo);
AI-518/708 artificial intelligence regulator (0.3/0.2 level accuracy / 0.24 second control period / multi-input / modular);
AI-708J type handheld communicator/servo amplifier (modular/delayable deviation alarm function/hand automatic slow function);
AI-519/719 artificial intelligence regulator (0.3/0.1 level accuracy, power-on soft start / V7.5 version parameter list);
6, AI intelligent temperature instrument debugging AI intelligent temperature regulator: is the core part of the heating furnace temperature control system. The AI ​​instrument pioneered the platform concept and converted the highly specialized digital adjustment instrument into a platform-designed product. The AI ​​artificial intelligence adjustment algorithm is a new algorithm that uses fuzzy rules for PID adjustment. At the same time, the fuzzy algorithm is used to eliminate the phenomenon of PID saturation integration. When the error is small, the improved PID algorithm is used for adjustment, and some features of the controlled object can be automatically learned and memorized in the adjustment to optimize the effect.
Self-tuning method: Since the self-tuning is performed by position adjustment, after 2~3 oscillations, the internal microprocessor of the instrument automatically calculates M 5 according to the oscillation generated by the position control, analyzing its period, amplitude and waveform. P, t and other control parameters. It has the characteristics of no overshoot, high precision, simple parameter determination, and good control effect on complex objects. Program instrument self-tuning, please set the first program to the usual temperature or the highest temperature from the setting. . . .
In the process of use, the AI ​​regulator combines PID adjustment, self-learning and fuzzy control technology to realize the self-tuning/adaptive function, and the precise adjustment without undershoot, which is far superior to the traditional PID regulator.
Fourth, the industry application case in many temperature control instead of simple temperature control, also need to record data in real time, using temperature control recorder [split type paperless recorder] to combine the adjustment instrument and the recorder organically, Provides optimal control and recording performance to solve problems in real-world applications.
The development direction of today's ceramic kiln is from the roller lining, automation, coal gasification, light weight and large-scale development in the past to the green (environmental protection, energy saving and intelligent) kiln. Green kiln standards are low consumption (energy saving), low pollution (environmentally friendly), low cost, and high efficiency. The efforts to achieve green kiln are: research new automatic control methods and methods, reduce kiln fan power "target=_blank> electromechanical consumption and noise, research advanced burners, use new refractories and coatings, establish exhaust gas purification Research and testing center. The goal of achieving green kiln is: fuel consumption is further reduced by 10%-20%, kiln thermal efficiency is increased by 10%-20%, power consumption is reduced by 10%-30%, noise and smoke are greatly reduced. This puts forward higher technical requirements for the original kiln control methods and methods. At present, the control method of the kiln has been developed from manual adjustment control in the 1990s to intelligent control; from decentralized control to distributed control; The temperature is changed from the previous simple PID adjustment method to the PID plus fuzzy control adjustment method; the transmission is changed from the conventional control to the linear speed control of the frequency conversion technology, etc. As the length of the furnace increases (150-250 m), the production volume increases ( 6000-1500m2/day), shortening of firing cycle (60-30m) In) and other factors, coupled with the kiln control target is a multi-input, multi-output, multi-variable, large lag, non-line change, making our past control methods less and less suitable for the development requirements of the current kiln With the development of computer technology and electronic technology, computer control technology has gradually replaced traditional control technology.
The AI ​​artificial intelligence adjustment algorithm is a new algorithm that uses fuzzy rules to adjust PID. When the error is large, the fuzzy algorithm is used to eliminate the phenomenon of PID saturation integration. When the error is small, the improved PID algorithm is used to adjust. And can automatically learn and memorize some features of the controlled object in the adjustment to optimize the effect.
In the process of use, the AI ​​regulator combines PID adjustment, self-learning and fuzzy control technology to realize the self-tuning/adaptive function, and the precise adjustment without undershoot, which is far superior to the traditional PID regulator.
The temperature control recorder combines the adjustment instrument with the recorder to provide optimal control and recording performance, solving the problems in practical applications.
1. High-temperature furnace application test chamber High-temperature furnace is commonly known as muffle furnace: it is a commonly used industrial electric furnace, which is a general-purpose heating equipment. It can be divided into box-type furnace-type furnace. The furnace wall is made of square refractory material and insulation material, and the heating wire is wound on the furnace wall. Muffle furnace cycle operation type, mainly used for coal, electricity, chemical, building materials "target=_blank> building materials, metallurgy, scientific research and other departments and colleges and universities laboratory for elemental analysis and determination.
2, periodic resistance furnace applications: box furnace: trolley furnace (divided into self-propelled and traction), used for annealing, heating the workpiece with the furnace cooling; well furnace: hood furnace (mainly used for Annealing, heating cover can be hung); rotary drum furnace: sealed box furnace (also known as multi-purpose furnace, can carry out heat treatment processes such as carburizing, smooth quenching, carbonitriding;
3, tunnel oven heating control system application: annealing furnace is mainly composed of roller drive system and temperature control heating system. Partition heating. The heating body is made of iron-chromium-aluminum material, the temperature is 0～1100°C, the nickel-chromium-nickel-silicon thermocouple is used as the temperature measurement, and the heating power source is the low-voltage 380V three-phase power source. The heating bodies are connected in a star shape and they are arranged on the top of the furnace and on the bottom of the furnace. The new temperature-controlled heating system consists of AI-808PAI5X3L1L1S4 program-type temperature control regulator and three-phase thyristor trigger circuit and AI-2070 split paperless recorder and other low-voltage control components.
4, automatic chemical drying box application: steam circulating oven products, after many upgrades to reach the advanced level at home and abroad, the average thermal efficiency of more than 70%, using axial fan circulation, with automatic constant temperature system, using AI-2070 Paperless recorder intelligent program temperature control records the entire process of data records. It uses steam or electricity as a heat source to heat the air by means of an axial flow fan to convective heat transfer of the heat exchanger. The hot air laminar flow passes through the baking tray and the material for heat transfer. Fresh air is replenished from the air inlet, and waste humid air is discharged from the temperature exhaust port, continuously replenishing fresh air and discharging waste humid air, so as to maintain proper temperature and relative humidity in the oven. The biggest feature of this series of ovens is that most of the heat is circulated in the tank, and the whole cycle is closed, which enhances the sensing and saves energy.
5, vacuum heat treatment furnace application: vacuum heat treatment furnace is one of the four basic industries of machinery manufacturing (casting, forging, heat treatment, welding), is a very important key process in the manufacture of mechanical products. The vacuum heat treatment furnace intelligently controls the temperature, the furnace door is automatically opened, the trolley moves automatically, and the fire is in motion.
As we all know, the quality of heat treatment depends on the heat treatment process and equipment. The advanced heat treatment equipment not only can correctly complete the heat treatment process but also has the functions of energy saving and pollution prevention, thus achieving energy saving, precision and green heat treatment.
The electric heating element in the vacuum heat treatment furnace is spiral, and the rear wall and the top of the furnace are equipped with thermocouples. The AI-2070 paperless recorder intelligent program is used to control the temperature, which is used to control and record the furnace temperature and vacuum. These data are stored in the AI-2070 paperless recorder database.
6. SCR temperature controller application: Industrial resistance furnace is a kind of common industrial controlled object with nonlinearity, large hysteresis and large inertia. Resistance furnaces are widely used in laboratory sample melting samples, segment heating and cooling of workpieces during heat treatment. Different types of PID regulators can be used to control the temperature in the appropriate range according to the different requirements of the process for temperature accuracy.
For the resistance furnace that requires constant temperature control and temperature recording, the digital temperature display regulator with PID adjustment is used to display and adjust the temperature. The output 0~10mA is used as the DC signal input to control the thyristor voltage regulator or the trigger board to change the thyristor. The size of the conduction angle of the tube is used to adjust the output power, which can fully meet the requirements, low input cost, convenient and intuitive operation and easy maintenance.
For the complex control system requiring high temperature control accuracy, multi-point temperature control and recording, it is ideal to use AI-2070 paperless recorder. The input and output module constitutes a control system to replace the previous digital temperature indicating regulator, which not only realizes the equipment. Upgraded and fully compatible with previous devices.
V. Conclusion AI temperature split type paperless recorder has a wide range of applications, covering industries, agriculture, transportation, science and technology, environmental protection, national defense, culture and education, and people's lives. Its products have been mainly used in chemical, thermoelectric, petrochemical, pharmaceutical, and metallurgical industries. , machinery, electric furnaces, heat treatment, food, paper and scientific research experiments. Have a good market demand and huge development potential. Specific applications such as: independent electric furnace, kiln control, various continuous production processes, more suitable for occasions with intermittent control display, such as batch control, flow accumulation, non-continuous production and quality testing. The system implements the flexible design concept. The signal types of all input channels can be changed as needed. The storage time of each recorded data can be set according to the requirements, and can be conveniently transferred to the active hard disk. The system has been stable in the field for a long time and has a good user reputation. It is a mature and reliable product.
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