CN201100880Y - Analog resistor based on PC104 bus - Google Patents
Analog resistor based on PC104 bus Download PDFInfo
- Publication number
- CN201100880Y CN201100880Y CNU2007201161754U CN200720116175U CN201100880Y CN 201100880 Y CN201100880 Y CN 201100880Y CN U2007201161754 U CNU2007201161754 U CN U2007201161754U CN 200720116175 U CN200720116175 U CN 200720116175U CN 201100880 Y CN201100880 Y CN 201100880Y
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- resistance
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- output
- converter
- operational amplifier
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- Control Of Electric Motors In General (AREA)
Abstract
The utility model provides an analog resistance on the basis of PC104 bus, which comprises a standard resistance and is characterized in that the analog resistance also comprises an input operational amplifier, a D/A converter and an output operational amplifier, wherein an in-phase input end of the input operational amplifier and one end of the standard resistance are connected with input voltage, a reversed phase input end and a reversed phase output end of the input operational amplifier are connected with a reference voltage end of the D/A converter, an output voltage end of the D/A converter is connected with the in-phase input end of the output operational amplifier, the reversed phase input end and the reversed phase output end of the output operational amplifier are connected with the other end of the standard resistance, and a data end of the D/A converter is connected with an external controller. The analog resistance of the utility model has good dynamic resistance simulation ability under the control of programs and can satisfy the demands of a turbofan engine to control semi-physical simulation experiments. The mode finishes various automatic tests of simulation process conveniently and thereby guarantees that dynamic simulation of a semi-substantial emulation platform is realized.
Description
(1) technical field
The utility model relates to a kind of artifical resistance implement device based on the PC104 bus, is can realize by the control of PC104 bus realization to the output terminal resistance value.
(2) background technology
At present, in the Turbofan Engine Control semi-physical simulation, the controlling object engine adopts the mathematical model that runs on the portable minisize computing machine, controller is real physical unit, and sensor in the control system and topworks can take physical unit or electronic simulator according to the needs of test.The simulation of thermal resistance sensor does not have good solution all the time.The simulation of the thermal resistance sensor of the Turbofan Engine Control of present stage mainly obtains variable resistance with the combination by different resistance in the manual switchover precision resistance case, the great like this efficient that lowers test, simultaneously in the Turbofan Engine Control semi-physical simulation, this method is difficult to the dynamic similation ability of realization to resistance, and then can cause the semi-physical emulation platform process to be obstructed.
(3) summary of the invention
The purpose of this utility model is to provide a kind of able to programme, artifical resistance based on the PC104 bus that precision is high, simple and reasonable.
The purpose of this utility model is achieved in that it comprises measuring resistance, it is characterized in that it also comprises input amplifier, D/A converter and output amplifier, the in-phase input end of input amplifier and an end of measuring resistance are connected input voltage, the inverting input of input amplifier is connected the reference voltage terminal of D/A converter with output terminal, the output voltage terminal of D/A converter connects the in-phase input end of output amplifier, the inverting input of output amplifier is connected the other end of measuring resistance with output terminal, the data terminal of D/A converter connects peripheral control unit.
The utility model also has some technical characterictics like this:
1, the data terminal of described D/A converter connects peripheral control unit by the PC104 bus.
The mode that the utility model provides temperature sensor to take electronic simulation constitutes one-port network with amplifier etc., obtains the ratio of input voltage and electric current by programming, can obtain programmable linear resistance.This impedance synthetic technology can obtain very high-precision output resistance.
The technical scheme that its technical matters that solves the utility model adopts is: realize the transmission of command signal on the PC104 bus, this command signal is by deciphering processing to it, take out in the bus data at data message of the present utility model, after DC/DC conversion and photoelectricity isolation processing, pass to the high precision D/A control section of artifical resistance, and then be able to obtain the purpose of stable artifical resistance.The utility model is the signal Processing that is implemented on the PC104 bus, has guaranteed the reliability of the control that artifical resistance is realized.
The utility model is applied to the electronic simulation resistive technologies in the semi-physical simulation interface simulator, with the simulation thermal resistance sensor at fanjet half dynamic simulation platform of forming based on the portable minisize computing machine of PC104 bus in kind.Improving the synthetic precision of resistance, improving the isolation between antijamming capability, the hyperchannel and proposing effective solution with aspect such as PC104 bus fusion.The beneficial effects of the utility model are, can realize dynamic similation ability easily in the Turbofan Engine Control semi-physical simulation, increase the efficient of test resistance, played crucial effect at the Turbofan Engine Control semi-physical simulation, and realized that principle is simple.
(4) description of drawings
Fig. 1 is the system principle diagram of the utility model embodiment;
Fig. 2 is that the utility model artifical resistance is realized schematic diagram.
(5) embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
According to the requirement of system design of fanjet half dynamic simulation platform in kind, the system principle diagram of present embodiment is made up of decoding logic circuit, photoelectric isolating circuit, D/A converting circuit, DC-DC power circuit and artifical resistance module etc. shown in Figure 1.The control data instruction of the computing machine on the PC104 bus, cooperate with 8255 through decoding controller, the base address according to code translator sets provides digital controlled signal, this signal is through the D/A of photoelectricity isolated controlling artifical resistance, and then realization is to the control of the resistance of artifical resistance.
In conjunction with Fig. 2, the present embodiment artifical resistance is made of input amplifier D1, D/A converter, output amplifier D2 and measuring resistance R1.Put on the input voltage value U of measuring resistance one end
iAfter buffering amplification, ratio adjusting, feed back to the other end of measuring resistance, control input current with this, thereby determine the input resistance value.
Operational amplifier D1 is connected into the voltage follower form, and output voltage is U
i, as the reference voltage of D/A converter.The transmission coefficient K of D/A converter for example adopts 16 DAC chip, then K=DA value/65536 by the digital signal decision that is input to D/A.So its output voltage is U
D/A=KU
iBecause two input end current potentials equated when D2 worked in the linear amplification state, so the end of oppisite phase voltage of D2 also is KU
iThe input current of artifical resistance is by measuring resistance R
1Flow to the output terminal of amplifier D2.Like this, the voltage that puts on the measuring resistance is U
i-KU
i, electric current is I
i=(U
i-KU
i)/R
1Because the in-phase end input current of amplifier D1 is zero, then input is brought in and says, can gets combined resistance and be:
Be that measuring resistance has doubled 1/ (1-K) doubly.When K=0, resistance is constant; When K=0.9, resistance amplifies 10 times.So, can change the combined resistance value to adjust the K value by the input digit amount that changes D/A converter.Measuring resistance R
1Can be chosen as 10 Ω, 100 Ω, thus can obtain exporting 100 Ω, 1k Ω etc. are the resistance range continuously.In the circuit, operational amplifier D1 connects into the form of voltage follower, and D2 is near unity gain, and the access corrective capacity, therefore can obtain stable artifical resistance.
Claims (2)
1. artifical resistance based on the PC104 bus, it comprises measuring resistance, it is characterized in that it also comprises input amplifier, D/A converter and output amplifier, the in-phase input end of input amplifier and an end of measuring resistance are connected input voltage, the inverting input of input amplifier is connected the reference voltage terminal of D/A converter with output terminal, the output voltage terminal of D/A converter connects the in-phase input end of output amplifier, the inverting input of output amplifier is connected the other end of measuring resistance with output terminal, the data terminal of D/A converter connects peripheral control unit.
2. the artifical resistance based on the PC104 bus according to claim 1 is characterized in that the data terminal of described D/A converter connects peripheral control unit by the PC104 bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201161754U CN201100880Y (en) | 2007-05-11 | 2007-05-11 | Analog resistor based on PC104 bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201161754U CN201100880Y (en) | 2007-05-11 | 2007-05-11 | Analog resistor based on PC104 bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201100880Y true CN201100880Y (en) | 2008-08-13 |
Family
ID=39937411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201161754U Expired - Fee Related CN201100880Y (en) | 2007-05-11 | 2007-05-11 | Analog resistor based on PC104 bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201100880Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424138A (en) * | 2013-08-27 | 2013-12-04 | 浙江水利水电学院 | Combined resistance type instrument calibration device |
| CN104810122A (en) * | 2015-04-14 | 2015-07-29 | 常州信息职业技术学院 | Programmable control precision resistor box |
| CN105022013A (en) * | 2014-04-30 | 2015-11-04 | 惠州市德赛西威汽车电子股份有限公司 | Programmable resistance calibration instrument |
-
2007
- 2007-05-11 CN CNU2007201161754U patent/CN201100880Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424138A (en) * | 2013-08-27 | 2013-12-04 | 浙江水利水电学院 | Combined resistance type instrument calibration device |
| CN103424138B (en) * | 2013-08-27 | 2015-08-12 | 浙江水利水电学院 | Combined resistance formula instrument calibration device |
| CN105022013A (en) * | 2014-04-30 | 2015-11-04 | 惠州市德赛西威汽车电子股份有限公司 | Programmable resistance calibration instrument |
| CN104810122A (en) * | 2015-04-14 | 2015-07-29 | 常州信息职业技术学院 | Programmable control precision resistor box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080813 |