CN202217190U - Temperature balance controller - Google Patents
Temperature balance controller Download PDFInfo
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- CN202217190U CN202217190U CN2011202579858U CN201120257985U CN202217190U CN 202217190 U CN202217190 U CN 202217190U CN 2011202579858 U CN2011202579858 U CN 2011202579858U CN 201120257985 U CN201120257985 U CN 201120257985U CN 202217190 U CN202217190 U CN 202217190U
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Abstract
The utility model discloses a temperature balance controller, which comprises a single chip microcomputer, a temperature measuring unit, a temperature control output unit and a press key type input unit. The temperature measuring unit, the temperature control output unit and the press key type input unit are all connected with the single chip microcomputer. The temperature balance controller is characterized in that the temperature value input through the press key input unit serves as a temperature set value, the onsite temperature value measured by the temperature measuring unit in real time serves as a temperature feedback value, proportional integral derivative (PID) control is introduced, PID parameter is obtained according to temperature error signals between the temperature set value and the temperature feedback value, the single chip microcomputer conducts corresponding control signals according to the PID parameter, and the temperature control output unit is utilized to control onsite temperature. The temperature balance controller is capable of measuring onsite temperature in real time and adjusting onsite temperature according to temperature measurement condition and manual setting condition, wherein manual setting can be finished by operating press keys. The temperature balance controller is capable of achieving optimum control of a temperature controller.
Description
Technical field
The utility model relates to a kind of temperature controller.
Background technology
The measurement of temperature is one of vital task of Automation of Manufacturing Process with control.Temperature control system is widely used in Industry Control, and is very general as in industries such as power plant construction, petrochemical complex, metallurgy, machine-building, food processing, using.Mainly be through with Industry Control field temperature analog quantity through sensor acquisition, convert digital quantity input computing machine to through A/D again, realize storage, the processing of data, the process of demonstration by temperature control system software.The PID controller is used the widest in the working control engineering, and it is widely used mainly is because it is simple in structure, in reality, understood easily and realize, and many Advanced Control all are controlled to be the basis with PID.Traditional PID controller controller subject matter is the parameter tuning problem; Method is to obtain on the basis of mathematical model of controlled plant, confirms pid parameter according to a certain principle of adjusting, and it is adjusted generally needs veteran engineering technical personnel to accomplish; Not only consuming time but also consume power; Real system varies in addition, and hysteresis, factor such as non-linear are arranged again, makes the certain degree of difficulty of having adjusted of pid parameter; Cause fine that many PID controllers fail to adjust, such system can't be operated in gratifying state naturally.And parameter in a single day adjust calculate good after, all be changeless in whole control process.And in real system,, therefore in modern times in the Industry Control, adopt the traditional PID controller controller to be difficult to obtain the control effect of being satisfied with because system can go out the uncertainty of present condition and parameter in control procedure, it is more outstanding to be applied on the temperature controller defective.
The utility model content
The task of the utility model is to solve the existing technological deficiency of temperature controller of introducing PID in the prior art, and a kind of temperature equalization controller is provided.
Its technical solution is:
A kind of temperature equalization controller comprises single-chip microcomputer, temperature measuring unit, temperature control output unit and button input block, and above-mentioned temperature measuring unit, temperature control output unit all are connected single-chip microcomputer with the button input block; By the temperature value of above-mentioned button input block input as desired temperature; The scene temperature value that temperature measuring unit records in real time is as the Temperature Feedback value; Introduce PID control; Obtain pid parameter according to the temperature error signals between desired temperature and the Temperature Feedback value, single-chip microcomputer is made control signal corresponding according to pid parameter, through temperature control output unit control scene temperature.
Above-mentioned single-chip microcomputer is according to the difference of pid parameter, produces the square wave of different duty, sends into the temperature control output unit, and when square wave was high level, relay closes added electrothermal stove work by this relay control; When square wave was low level, relay broke off, and adds electrothermal stove and quits work.
The said temperature balance controller also comprises 4～20mA normalized current output channel, communication unit and alarm unit.
Between the input buffer of above-mentioned button input block and single-chip microcomputer, be provided with optical coupling isolation circuit; Be provided with the linear optical coupling buffer circuit between D/A converter in the normalized current output channel and the subsequent conditioning circuit.
In the button input block, be provided with the RC filtering circuit that to remove key jitter.
Above-mentioned single-chip microcomputer is provided with button and presses time delay module, after button is pressed, promptly calls time delay module, judges the on off state of button.
Above-mentioned temperature measuring unit comprises four road thermocouple circuits and one road thermal resistance circuit, the electric signal of five groups of temperature of the measure field that can circulate, and be the temperature value of corresponding representative with electrical signal conversion, the average of five groups of temperature values as the scene temperature value.
The utlity model has following useful technique effect:
The utility model is the measure field temperature in real time, and regulates scene temperature according to the thermometric situation and the situation that artificially is provided with, and wherein artificial setting can be accomplished through operation push-button, and the utility model can be realized the optimization control of temperature controller.In addition, the utility model also is provided with 4～20mA normalized current output channel, is convenient to remote transmission; And the warning function of native system when also having the temperature exceeds boundary.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
Fig. 1 is the structural principle schematic block diagram of a kind of embodiment of the utility model.
Fig. 2 is a kind of control mode process flow diagram of Fig. 1 mode.
Fig. 3 is a kind of workflow diagram of single-chip microcomputer in Fig. 2 mode.
Embodiment
In conjunction with Fig. 1, Fig. 2 and Fig. 3, a kind of temperature equalization controller comprises single-chip microcomputer 1, temperature measuring unit 2, temperature control output unit 3 and button input block 4; Above-mentioned temperature measuring unit, temperature control output unit all are connected single-chip microcomputer with the button input block.By the temperature value of above-mentioned button input block input as desired temperature; The scene temperature value that temperature measuring unit records in real time is as the Temperature Feedback value; Introduce PID control; Obtain pid parameter according to the temperature error signals between desired temperature and the Temperature Feedback value, single-chip microcomputer is made control signal corresponding according to pid parameter, through temperature control output unit control scene temperature.
In the aforesaid way, single-chip microcomputer is according to the difference of pid parameter, produces the square wave of different duty, sends into the temperature control output unit, and when square wave was high level, relay closes added electrothermal stove work by this relay control; When square wave was low level, relay broke off, and adds electrothermal stove and quits work.The square wave of above-mentioned different duty has been controlled the heating power that adds electrothermal stove, and then different temperature is kept in control.
In the aforesaid way, the temperature equalization controller also can comprise 4～20mA normalized current output channel 5, communication unit 6 and alarm unit 7.
In the aforesaid way, between the input buffer of above-mentioned button input block and single-chip microcomputer, be provided with optical coupling isolation circuit; Be provided with the linear optical coupling buffer circuit between D/A converter in the normalized current output channel and the subsequent conditioning circuit.
In the aforesaid way, in the button input block, be provided with the RC filtering circuit that to remove key jitter.And above-mentioned single-chip microcomputer is provided with button and presses time delay module, after button is pressed, promptly calls time delay module, judges the on off state of button.
In the aforesaid way; Above-mentioned temperature measuring unit comprises four road thermocouple circuits and one road thermal resistance circuit; The electric signal of five groups of temperature of the measure field that can circulate; And with the temperature value (can use piecewise-linear techniques) of electrical signal conversion for corresponding representative, the average of five groups of temperature values (or according to actual conditions weighted mean) as the scene temperature value.Because it is non-linear that the temperature-resistance of device such as thermal resistance exists, be the resistance of corresponding thermopair in the electrical signal conversion that single-chip microcomputer is received after, during again with the corresponding one-tenth of resistance relevant temperature; Use the method for piece-wise linearization; The nonlinear curve that is about to temperature-resistance is divided into plurality of sections, is approximated to linear relationship in each section, the resistance correspondence of reality is found the section at its place; Then, can draw the pairing temperature of resistance according to the linear relationship in the section.
The technology contents of not addressing in the aforesaid way is taked or is used for reference prior art and can realize.
Need to prove that those skilled in the art can also make such or such easy variation pattern under the instruction of this instructions, such as equivalent way, or obvious mode of texturing.Above-mentioned variation pattern all should be within the protection domain of the utility model.
Claims (4)
1. a temperature equalization controller comprises single-chip microcomputer, temperature measuring unit, temperature control output unit and button input block, and above-mentioned temperature measuring unit, temperature control output unit all are connected single-chip microcomputer with the button input block; It is characterized in that: between the input buffer of said button input block and single-chip microcomputer, be provided with optical coupling isolation circuit; Be provided with the linear optical coupling buffer circuit between D/A converter in the normalized current output channel and the subsequent conditioning circuit; Said temperature measuring unit comprises four road thermocouple circuits and one road thermal resistance circuit, the electric signal of five groups of temperature of the measure field that can circulate, and be the temperature value of corresponding representative with electrical signal conversion, the average of five groups of temperature values as the scene temperature value.
2. temperature equalization controller according to claim 1 is characterized in that: said temperature equalization controller also comprises 4～20mA normalized current output channel, communication unit and alarm unit.
3. temperature equalization controller according to claim 1 is characterized in that: in said button input block, be provided with the RC filtering circuit that can remove key jitter.
4. temperature equalization controller according to claim 3 is characterized in that: said single-chip microcomputer is provided with button and presses time delay module, after button is pressed, promptly calls time delay module, judges the on off state of button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202579858U CN202217190U (en) | 2011-07-21 | 2011-07-21 | Temperature balance controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202579858U CN202217190U (en) | 2011-07-21 | 2011-07-21 | Temperature balance controller |
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| Publication Number | Publication Date |
|---|---|
| CN202217190U true CN202217190U (en) | 2012-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202579858U Expired - Fee Related CN202217190U (en) | 2011-07-21 | 2011-07-21 | Temperature balance controller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102982721A (en) * | 2012-12-13 | 2013-03-20 | 重庆大学 | Experiment teaching device capable of controlling temperature feedback of oven automatically |
| CN103296867A (en) * | 2013-06-28 | 2013-09-11 | 成都芯源***有限公司 | Multiphase switching converter, controller and control method thereof |
| CN104049651A (en) * | 2013-03-11 | 2014-09-17 | 鸿富锦精密工业(武汉)有限公司 | Refrigeration system |
-
2011
- 2011-07-21 CN CN2011202579858U patent/CN202217190U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102982721A (en) * | 2012-12-13 | 2013-03-20 | 重庆大学 | Experiment teaching device capable of controlling temperature feedback of oven automatically |
| CN104049651A (en) * | 2013-03-11 | 2014-09-17 | 鸿富锦精密工业(武汉)有限公司 | Refrigeration system |
| CN104049651B (en) * | 2013-03-11 | 2016-12-28 | 广州市旺骏机电设备安装有限公司 | Refrigeration system |
| CN103296867A (en) * | 2013-06-28 | 2013-09-11 | 成都芯源***有限公司 | Multiphase switching converter, controller and control method thereof |
| CN103296867B (en) * | 2013-06-28 | 2015-07-15 | 成都芯源***有限公司 | Multiphase switching converter, controller and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20150721 |
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| EXPY | Termination of patent right or utility model |