CN202472450U

CN202472450U - Full-automatic fuzzy temperature control device

Info

Publication number: CN202472450U
Application number: CN201120556188XU
Authority: CN
Inventors: 刘吉雄; 唐民军
Original assignee: WUHAN INSTITUTE OF COMPUTER PERIPHERALS
Current assignee: WUHAN INSTITUTE OF COMPUTER PERIPHERALS
Priority date: 2011-12-28
Filing date: 2011-12-28
Publication date: 2012-10-03
Anticipated expiration: 2021-12-28

Abstract

The utility model discloses a full-automatic fuzzy temperature control device, relating to the temperature control field and comprising a touch screen, a PLC, a temperature test module, an intermediate control circuit and a heating element, wherein the intermediate control circuit is a solid-state relay; a temperature sensor is arranged on the heating element; the PLC is respectively connected with the touch screen, the temperature test module and the intermediate control circuit; and the heating element is respectively connected with the temperature test module and the intermediate control circuit. The full-automatic fuzzy temperature control device can improve the accuracy of temperature control so as to make the fluctuation range of the temperature be no more than +/-10 DEG C.; and as the control accuracy is superior to the PID control mode, the required temperature control range in the test can be satisfied.

Description

Full-automatic fuzzy temperature control equipment

Technical field

The utility model relates to domain of control temperature, particularly relates to a kind of full-automatic fuzzy temperature control equipment.

Background technology

In the research and development of fume exhauster grease separating degree and odor reduction degree product, need to use a kind of temperature control equipment.In temperature controlled processes, be heat temperature raising and temperature stabilization stage early stage, and this stage finishes the back system and is in a kind of heating and natural heat dissipation equilibrium state; Later stage, distilled water dropping liquid system splashed into distilled water to whole heat balance system, in this process, liquid evaporation can occur; Evaporated liquid can be taken away great amount of heat, and the system radiating state is undergone mutation, and temperature balance is broken; Temperature declines to a great extent, and the rising of PID temperature control system needs a process slowly, and the temperature control curve of actual measurement is referring to shown in Figure 1; As can be seen from Figure 1 PID control system temperature stabilization need to get off one period long period; In case dropping liquid begins, the temperature of whole pan can sharply descend, and maximum decreases by about 40 degree.Owing in temperature controlled process, control environment and to undergo mutation; Traditional PID controller (Proportion Integration Differentiation; PID) temperature control mode is better to fixed environment pattern control ratio; It is unreliable that temperature under the interim environmental catastrophe condition is controlled, and be not suitable for the temperature-controlled environment of current sudden change.

The utility model content

The purpose of the utility model is in order to overcome the deficiency of above-mentioned background technology; A kind of full-automatic fuzzy temperature control equipment is provided; Can improve temperature controlled precision; The fluctuating range up and down of temperature is no more than ± 10 ℃, control accuracy is superior to pid control mode, can satisfy the temperature controlling range that requires in the test.

The full-automatic fuzzy temperature control equipment that the utility model provides; It comprises heater element and intermediate controlled circuit; It also comprises touch-screen, programmable logic controller (PLC) PLC and temperature test module; Said PLC links to each other with touch-screen, temperature test module and intermediate controlled circuit respectively, and heater element links to each other with the intermediate controlled circuit with the temperature test module respectively.

In technique scheme, said intermediate controlled circuit is a solid-state relay.

In technique scheme, on the said heater element temperature sensor is installed.

Compared with prior art, the advantage of the utility model is following:

(1) the utility model has improved temperature control precision, the fluctuating range up and down of temperature is no more than ± 10 ℃, and control accuracy is superior to pid control mode, can satisfy the temperature controlling range that requires in the test.

(2) the utility model has realized that not only temperature controls automatically, has also added temperature prediction, trystate memory and Based Intelligent Control function, can better adapt to actual demand.

(3) the utility model can also be realized the adjusting of any given state of temperature, under the condition that suddenling change appears in the heating environment, realizes the prediction output function.

Description of drawings

Fig. 1 is the temperature control curve synoptic diagram of surveying in the traditional PI D temperature control system.

Fig. 2 is the structural representation of the utility model embodiment.

Fig. 3 is the temperature control curve synoptic diagram of surveying among the utility model embodiment.

Among the figure: 1-touch-screen, 2-PLC, 3-temperature test module, 4-intermediate controlled circuit, 5-heater element.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe in detail.

Referring to shown in Figure 2; The full-automatic fuzzy temperature control equipment that the utility model embodiment provides; It comprises touch-screen 1, PLC (Programmable Logic Controller, programmable logic controller (PLC)) 2, temperature test module 3, intermediate controlled circuit 4 and heater element 5, wherein; Intermediate controlled circuit 4 is a solid-state relay; On the heater element 5 temperature sensor is installed, PLC2 links to each other with touch-screen 1, temperature test module 3 and intermediate controlled circuit 4 respectively, and heater element 5 links to each other with intermediate controlled circuit 4 with temperature test module 3 respectively.

The principle of the utility model embodiment is set forth as follows in detail:

The temperature parameter that the utility model embodiment is provided with according to the user is regulated the needed temperature of test automatically, and is fed back to PLC2, and the state through PLC2 adjustment intermediate controlled circuit 4 makes the requirement that more is near the mark of its temperature.The temperature that the human-computer interaction interface input of user through touch-screen 1 need reach; The internal processes of PLC2 is regulated according to parameter automatically then, through the thermal value of intermediate controlled circuit 4 control heater elements 5, the temperature that temperature test module 3 real-time testings obtain; And feed back to PLC2; The internal processes of PLC2 is according to the temperature value of feedback, and relatively and predict the temperature variation of whole temperature control system, in time the result according to the prediction computing adjusts intermediate controlled circuit 4; And then the thermal value of regulating heater element 5, thereby the temperature fluctuation control of system is no more than ± 10 ℃ of scopes in.

Concrete control procedure is following:

Operating personnel set desired temperature through the touch-screen on the equipment 1, and in temperature control equipment, at first setting a temperature control cycle is 3 seconds, and portion of time is switched on to heating system in this control cycle; Be t1 its conduction time; T2 excess time in this cycle cuts off heating power supply, thereby makes the average thermal value of heating system controlled, in follow-up temperature control computing, passes through the value of adjustment t1, t2; Get final product the average thermal value of accurate Adjustment System; Connecting line by PLC2 and touch-screen 1 passes to PLC2, and PLC2 carries out preliminary computing through the internal control program, and result of calculation is exported through intermediate controlled circuit 4; Thereby the thermal value of control heater element 5 makes the temperature of system can do corresponding conversion adjusting.

Measure temperature through temperature test module 3 then; And this value fed back to PLC2, the internal processes of PLC2 is compared the value of setting on value of feedback and the touch-screen 1, and the temperature changing trend of prediction follow-up time; Calculate according to relatively reaching prediction result then, and readjust output.Through the mode of output of output-measurement-feedback-relatively and prediction-again; Adjust in real time; At last temperature is controlled in the needed temperature of system, can obtains ± 5 ℃ adjustment accuracy through above automatic regulating step, the actual temperature state of a control that reaches is referring to shown in Figure 3.

The utility model embodiment is through to the prediction of the temperature in the practical application, and to through PLC2 temperature being controlled in real time, realized that not only temperature controls automatically, the fluctuating range up and down of temperature is no more than ± 10 ℃, and control accuracy is superior to pid control mode; Add temperature prediction, trystate memory and Based Intelligent Control function simultaneously, can satisfy the temperature controlling range that requires in the test fully; Can also realize the adjusting of any given state of temperature, under the condition that suddenling change appears in the heating environment, realize the prediction output function.

Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technologies thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.

The content of not doing in this instructions to describe in detail belongs to this area professional and technical personnel's known prior art.

Claims

1. one kind is automatically blured temperature control equipment; It comprises heater element (5) and intermediate controlled circuit (4); It is characterized in that: it also comprises touch-screen (1), programmable logic controller (PLC) PLC (2) and temperature test module (3); Said PLC (2) links to each other with touch-screen (1), temperature test module (3) and intermediate controlled circuit (4) respectively, and heater element (5) links to each other with intermediate controlled circuit (4) with temperature test module (3) respectively.

2. full-automatic fuzzy temperature control equipment as claimed in claim 1, it is characterized in that: said intermediate controlled circuit (4) is a solid-state relay.

3. according to claim 1 or claim 2 full-automatic fuzzy temperature control equipment, it is characterized in that: said heater element is equipped with temperature sensor on (5).