CN103196582A - Device using multiple groups of digital potentiometers to simulate Pt 1000 platinum resistor and method of device simulating Pt 1000 platinum resistor - Google Patents
Device using multiple groups of digital potentiometers to simulate Pt 1000 platinum resistor and method of device simulating Pt 1000 platinum resistor Download PDFInfo
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- CN103196582A CN103196582A CN2013101132130A CN201310113213A CN103196582A CN 103196582 A CN103196582 A CN 103196582A CN 2013101132130 A CN2013101132130 A CN 2013101132130A CN 201310113213 A CN201310113213 A CN 201310113213A CN 103196582 A CN103196582 A CN 103196582A
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910052697 platinum Inorganic materials 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004364 calculation method Methods 0.000 claims abstract description 8
- 238000004088 simulation Methods 0.000 claims description 20
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
用多组数字电位器模拟Pt1000铂电阻的装置及该装置模拟Pt1000铂电阻的方法，涉及电子技术领域。它是为了解决电路复杂，体积大，数字电位器的分辨率不高，精度不能满足要求的问题。用多组数字电位器模拟Pt1000铂电阻的装置，通过按键输入模块设置当前温度值，依据铂电阻分度表，通过温度计算模块计算每个数字电位器在不同温度下所需要的抽头数，单片机控制电路根据每个数字电位器的抽头数分别发出控制信号给第一数字电位器，第二数字电位器和第三数字电位器，实现调整第一数字电位器，第二数字电位器和第三数字电位器的阻值，进而调整第一节点和第二节点之间的电阻值。本发明适用于现有电子技术领域的应用。
The invention relates to a device for simulating Pt1000 platinum resistors with multiple groups of digital potentiometers and a method for simulating Pt1000 platinum resistors with the device, relating to the field of electronic technology. It is to solve the problem that the circuit is complex, the volume is large, the resolution of the digital potentiometer is not high, and the accuracy cannot meet the requirements. Use multiple sets of digital potentiometers to simulate the Pt1000 platinum resistance device, set the current temperature value through the key input module, and calculate the number of taps required by each digital potentiometer at different temperatures through the temperature calculation module according to the platinum resistance graduation table. The control circuit sends control signals to the first digital potentiometer, the second digital potentiometer and the third digital potentiometer respectively according to the number of taps of each digital potentiometer, so as to realize the adjustment of the first digital potentiometer, the second digital potentiometer and the third digital potentiometer. The resistance value of the digital potentiometer is used to adjust the resistance value between the first node and the second node. The invention is applicable to the application in the field of electronic technology.
Description
Technical field
The present invention relates to electronic technology field, particularly the analogue technique of Pt1000 platinum resistance.
Background technology
Platinum resistance is the temperature variant thermal resistance of a kind of resistance meeting, and the normal method of combined resistance that adopts replaces platinum resistance in test and debugging.Combined resistance has following several method at present:
1. switch precision resistance by relay and obtain variable resistance.This method volume is big and because relay exists contact resistance to make that precision is difficult to guarantee.
2. constitute one-port network by the ratio of programming Control input electricity and input current with operational amplifier and digital to analog converter etc., thereby obtain combined resistance able to programme.But this method has certain limitation, and resistance variations is limited in scope, and measures complicated.
3. adopt the individual digit potentiometer to obtain variable resistance by switching semiconductor resistor.Can only not accomplish 256 taps at most but the resolution of present digital regulation resistance is high in the scope of 1k Ω, precision can not meet the demands.
Summary of the invention
The present invention is in order to solve in the process of simulation Pt1000 platinum resistance, the circuit complexity, volume is big, the resolution of digital regulation resistance is not high, the problem that precision can not meet the demands, and then provide with the device of many group digital regulation resistance simulation Pt1000 platinum resistance and the method for this device simulation Pt1000 platinum resistance.
Usefulness of the present invention is organized the device of digital regulation resistance simulation Pt1000 platinum resistance more, and it comprises keyboard input module, temperature computation module, single chip machine controlling circuit, first digital regulation resistance, second digital regulation resistance, the 3rd digital regulation resistance, first fixed resistance, second fixed resistance, the 3rd fixed resistance, first node and Section Point;
The output terminal of keyboard input module connects the input end of temperature computation module, the output terminal of temperature computation module connects the input end of single chip machine controlling circuit, three control signal output terminals of single chip machine controlling circuit connect the adjustment end of first digital regulation resistance respectively, the adjustment end of second digital regulation resistance and the adjustment end of the 3rd digital regulation resistance, resistance output terminal of first digital regulation resistance and an end of first fixed resistance are connected in first node, another resistance output terminal of first digital regulation resistance connects resistance output terminal of second digital regulation resistance and the other end of first fixed resistance simultaneously, one end of second fixed resistance, another resistance output terminal of second digital regulation resistance connects resistance output terminal of the 3rd digital regulation resistance and the other end of second fixed resistance simultaneously, one end of the 3rd fixed resistance, another resistance output terminal of the 3rd digital regulation resistance and the other end of the 3rd fixed resistance are connected in Section Point
Described first node and Section Point are two output terminals of the Pt1000 platinum resistance of simulation.
With the method for the device simulation Pt1000 platinum resistance of many groups digital regulation resistance simulation Pt1000 platinum resistance,
Step 1, by keyboard input module current temperature value is set;
The present invention can accurately simulate platinum resistance, and resolution is 1 ℃, and the gained resistance error can reach below 0.1%.And circuit is simple, is easy to realize, has overcome the bulky characteristics of relay simulation platinum resistance, and on having solved with the not high basis of individual digit potentiometer precision, is easier to measure than the method with operational amplifier and digital to analog converter again.
Description of drawings
Fig. 1 is one-piece construction synoptic diagram of the present invention.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, the described usefulness of present embodiment is organized the device of digital regulation resistance simulation Pt1000 platinum resistance more, and it comprises keyboard input module 1, temperature computation module 2, single chip machine controlling circuit 3, first digital regulation resistance 4, second digital regulation resistance 5, the 3rd digital regulation resistance 6, the first fixed resistance R1, the second fixed resistance R2, the 3rd fixed resistance R3, first node 7 and Section Point 8;
The output terminal of keyboard input module 1 connects the input end of temperature computation module 2, the output terminal of temperature computation module 2 connects the input end of single chip machine controlling circuit 3, three control signal output terminals of single chip machine controlling circuit 3 connect the adjustment end of first digital regulation resistance 4 respectively, the adjustment end of the adjustment end of second digital regulation resistance 5 and the 3rd digital regulation resistance 6, resistance output terminal of first digital regulation resistance 4 and the end of the first fixed resistance R1 are connected in first node 7, another resistance output terminal of first digital regulation resistance 4 connects resistance output terminal of second digital regulation resistance 5 and the other end of the first fixed resistance R1 simultaneously, the end of the second fixed resistance R2, another resistance output terminal of second digital regulation resistance 5 connects resistance output terminal of the 3rd digital regulation resistance 6 and the other end of the second fixed resistance R2 simultaneously, the end of the 3rd fixed resistance R3, another resistance output terminal of the 3rd digital regulation resistance 6 and the other end of the 3rd fixed resistance R3 are connected in Section Point 8
Described first node 7 and Section Point 8 are two output terminals of the Pt1000 platinum resistance of simulation.
Embodiment two: present embodiment is organized the further restriction of the device of digital regulation resistance simulation Pt1000 platinum resistance more to embodiment one described usefulness, in the present embodiment, described first digital regulation resistance, 4, the second digital regulation resistances 5 and the 3rd digital regulation resistance 6 all are that 256 taps and maximum value are the digital regulation resistance of 20k Ω; The fixed resistance value of the first fixed resistance R1 is 10k Ω, and the fixed resistance value of the second fixed resistance R2 is 600 Ω, fixed resistance value 60 Ω of the 3rd fixed resistance R3.
Embodiment three: in conjunction with Fig. 1 present embodiment is described, present embodiment is to adopt the described usefulness of embodiment one to two any one embodiment to organize the method for the device simulation Pt1000 platinum resistance of digital regulation resistance simulation Pt1000 platinum resistance more,
Step 1, by keyboard input module 1 current temperature value is set;
Embodiment four: present embodiment is further specifying embodiment three, the described usefulness of present embodiment is organized the method for the device simulation Pt1000 platinum resistance of digital regulation resistance simulation Pt1000 platinum resistance more, the described branch kilsyth basalt according to platinum resistance of step 2 by temperature computation module 2 each digital regulation resistance of calculating in the detailed process of the corresponding tap number of described temperature value is:
Look into the branch kilsyth basalt of Pt1000 platinum resistance according to the temperature value that arranges, obtain corresponding scale division value, platinum resistance namely the to be simulated resistance under relevant temperature; Temperature computation module 2 is calculated resistance and the corresponding tap number that obtains first digital regulation resistance 4, second digital regulation resistance 5 and the 3rd digital regulation resistance 6 according to the resistance of this resistance and the first fixed resistance R1, the resistance of the second fixed resistance R2 and the resistance of the 3rd fixed resistance R3.
Said process can adopt following method to realize: at first calculate each digital regulation resistance under each tap with resistance value after its parallel resistor is in parallel, each potentiometer obtains the corresponding array that contains 256 resistance values, adopt the mode of permutation and combination, from the array of three potentiometer correspondences, select a resistance value as one group of data respectively, with three resistance value addition acquisition and the resistance of this group in data, select and the resistance of platinum resistance under relevant temperature to be simulated immediate one and the corresponding one group of data of resistance, this is organized the tap number of three potentiometers of three resistance value correspondences in data as the tap number of correspondence.
In the present embodiment, needed tap number is as follows under different temperatures:
For example:
When the tap of first digital regulation resistance 4 is respectively 1,2, to should potentiometer with the first fixed resistance R1 parallel connection after corresponding resistance value be respectively: 0 Ω, 1 Ω;
When the tap of second digital regulation resistance 5 is respectively 3,4, to should potentiometer with the second fixed resistance R2 parallel connection after corresponding resistance value be respectively: 2 Ω, 3 Ω;
When the tap of the 3rd digital regulation resistance 6 is respectively 5,6, to should potentiometer with the 3rd fixed resistance R3 parallel connection after corresponding resistance value be respectively: 4 Ω, 5 Ω.
List the first node 7 of selected above-mentioned situation correspondence and all combinations of the resistance value between the Section Point 8:
0 Ω, 2 Ω, 4 Ω, the resistance value between corresponding first node 7 and the Section Point 8 is 6 Ω;
0 Ω, 2 Ω, 5 Ω, the resistance value between corresponding first node 7 and the Section Point 8 is 7 Ω;
0 Ω, 3 Ω, 4 Ω, the resistance value between corresponding first node 7 and the Section Point 8 is 7 Ω;
0 Ω, 3 Ω, 5 Ω, the resistance value between corresponding first node 7 and the Section Point 8 is 8 Ω;
1 Ω, 2 Ω, 4 Ω, the resistance value between corresponding first node 7 and the Section Point 8 is 7 Ω;
1 Ω, 2 Ω, 5 Ω, the resistance value between corresponding first node 7 and the Section Point 8 is 8 Ω;
1 Ω, 3 Ω, 4 Ω, the resistance value between corresponding first node 7 and the Section Point 8 is 8 Ω;
1 Ω, 3 Ω, 5 Ω, the resistance value between corresponding first node 7 and the Section Point 8 is 9 Ω;
If platinum resistance to be simulated resistance 7 Ω under relevant temperature, extracting a class value out so from all combinations of the corresponding array of selected three groups of potentiometers is 0 Ω, 2 Ω, 5 Ω; The tap number that obtains each potentiometer correspondence is 1,3, and 6.
In sum, the resistance 1k Ω of Pt1000 when obtaining 0 ℃, the resistance of the first fixed resistance R1 is 10k Ω, the resistance of the second fixed resistance R2 is 600 Ω, the resistance of the 3rd fixed resistance R3 is 60 Ω, first digital regulation resistance, 4, the second digital regulation resistances 5 and the 3rd digital regulation resistance 6 all are that 256 taps and maximum value are the digital regulation resistance of 20k Ω, and the process according to the result who obtains according to minute kilsyth basalt and digital regulation resistance calculation of parameter is so:
Regulate the tap to 9 of first digital regulation resistance 4, obtain resistance 700 Ω in parallel, regulate the tap to 5 of second digital regulation resistance 5, obtain resistance 254 Ω in parallel, regulate the tap to 2 of the 3rd digital regulation resistance 6, obtain resistance 46 Ω in parallel, the resistance after the series connection is 700 Ω+254 Ω+46 Ω=1000 Ω so, is the theoretical value of Pt1000 platinum resistance 0 ℃ the time.
According to the branch kilsyth basalt adjustment digital regulation resistance model of different thermal resistances or the resistance of institute's parallel precise resistance, can reach the function of the multiple thermal resistance of simulation.
Claims (4)
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| CN2013101132130A CN103196582A (en) | 2013-04-02 | 2013-04-02 | Device using multiple groups of digital potentiometers to simulate Pt 1000 platinum resistor and method of device simulating Pt 1000 platinum resistor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808563A (en) * | 2015-04-29 | 2015-07-29 | 山东工商学院 | High-accuracy programmable resistance combiner circuit and setting method thereof |
| CN104898737A (en) * | 2015-04-03 | 2015-09-09 | 上海申腾信息技术有限公司 | Temperature acquisition fault self-diagnosis system |
| CN105353334A (en) * | 2015-11-10 | 2016-02-24 | 中国电力科学研究院 | Output model for controlling simulation thermal resistance through servo motor and operation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666690A (en) * | 2009-09-08 | 2010-03-10 | 深圳和而泰智能控制股份有限公司 | Method and device for simulating NTC sensor parameters |
| CN202599568U (en) * | 2012-06-19 | 2012-12-12 | 北京康拓科技有限公司 | Output resistor suitable for platinum resistance thermometer sensor analog board |
-
2013
- 2013-04-02 CN CN2013101132130A patent/CN103196582A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666690A (en) * | 2009-09-08 | 2010-03-10 | 深圳和而泰智能控制股份有限公司 | Method and device for simulating NTC sensor parameters |
| CN202599568U (en) * | 2012-06-19 | 2012-12-12 | 北京康拓科技有限公司 | Output resistor suitable for platinum resistance thermometer sensor analog board |
Non-Patent Citations (1)
| Title |
|---|
| 张丽荣: "数字电位器的优化设计及应用研究", 《中国学位论文全文数据库》, 2 September 2009 (2009-09-02) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898737A (en) * | 2015-04-03 | 2015-09-09 | 上海申腾信息技术有限公司 | Temperature acquisition fault self-diagnosis system |
| CN104808563A (en) * | 2015-04-29 | 2015-07-29 | 山东工商学院 | High-accuracy programmable resistance combiner circuit and setting method thereof |
| CN105353334A (en) * | 2015-11-10 | 2016-02-24 | 中国电力科学研究院 | Output model for controlling simulation thermal resistance through servo motor and operation method thereof |
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Application publication date: 20130710 |