CN203118307U - Simulated device for differential transformer type sensor - Google Patents
Simulated device for differential transformer type sensor Download PDFInfo
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- CN203118307U CN203118307U CN 201320003307 CN201320003307U CN203118307U CN 203118307 U CN203118307 U CN 203118307U CN 201320003307 CN201320003307 CN 201320003307 CN 201320003307 U CN201320003307 U CN 201320003307U CN 203118307 U CN203118307 U CN 203118307U
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- signal
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- analogue means
- signal processing
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Abstract
The utility model provides a simulated device for a differential transformer type sensor, which at least comprises two output units used for outputting different simulated secondary coil signals. The simulated device further comprises a simulation control unit and at least two signal processing units, wherein the signal processing unit comprises a voltage dividing device; and the simulation control units are connected with the signal processing units respectively and designate the signal processing units to transmit received excitation signals to the corresponding output units according to a proportion designated by the simulation control unit through the voltage dividing device. The simulated device for the differential transformer type sensor can be controlled remotely, can be adapt to different excitation signal sources, can produce signals of two secondary coils meeting specified requirements, and can provide fault simulation signals which are difficult to be realized by a real sensor.
Description
Technical field
The utility model belongs to the Sensor Analog Relay System technical field, especially a kind of analogue means of differential transformer transducer.
Background technology
Differential transformer transducer (LVDT or RVDT) is the widely used important displacement/angular displacement sensor of Aero-Space and industrial circle, possesses advantages such as no rub measurement, unlimited mechanical life, unlimited resolution.In security, the higher occasion of reliability requirement, common upper control module can monitor the input and output signal of the type sensor.
Figure 1 shows that the differential transformer transducer structural principle of LVDT type, the movable transformer of the similar substantially iron core of its structure, by a primary coil, two secondary coils, iron core, coil rack, parts such as shell are formed.In the course of the work, the motion of iron core changes the magnetic flux in time coil, causes the variation of time coil output voltage, and two coil voltages of A, B change in the opposite direction.
In ground experiment, automatic control system or test macro, need simulate the type sensor, so that accurate, controlled simulating signal to be provided, be input to after upper control module resolves, carry out closed-loop control.Generally speaking, many technical grade product costs are higher, are difficult to adapt to concrete testing requirements, sometimes also can't be by the monitoring requirement of upper control module complexity.
Summary of the invention
The utility model proposes a kind of Sensor Analog Relay System device, can realize the simulation to differential transformer transducer, also the fault simulation signal that can provide actual sensor to be difficult to realize.
The utility model proposes a kind of analogue means of differential transformer transducer, comprise at least two output units, be used for the different simulation secondary coil signal of output, described analogue means also comprises analog controlling unit, and at least two signal processing units, wherein, described signal processing unit also comprises bleeder mechanism; Described analog controlling unit links to each other with described two signal processing units at least, and specifies described signal processing unit by described bleeder mechanism the pumping signal that receives to be transferred to corresponding described output unit respectively in the ratio of described analog controlling unit appointment.
In one embodiment, described bleeder mechanism comprises digital regulation resistance, and described digital regulation resistance is connected with described analog controlling unit, and output is by the signal of described analog controlling unit designated ratio.
In one embodiment, described signal processing unit further comprises the ratio amplifying circuit, links to each other with described digital regulation resistance, is used for adjusting the amplitude of described digital regulation resistance output signal.
In one embodiment, described signal processing unit also comprises buffer circuit, and is connected in described ratio amplifying circuit, is used for the load capacity of the output signal of the described ratio amplifying circuit of raising.
In one embodiment, described analogue means also comprises at least two signal modulation circuits, link to each other with described output unit, be used for the described simulation secondary coil signal of the described output unit output of modulation, and the described simulation secondary coil signal feedback after will modulating is to described analog controlling unit.
In one embodiment, described output unit comprises output isolation circuit, is used for isolating the simulating signal of output.
In one embodiment, described output isolation circuit is isolating transformer.
In one embodiment, described analogue means also comprises input isolation circuit, is used for isolating described pumping signal.
In one embodiment, described input isolation circuit is isolating transformer.
In one embodiment, described analogue means also comprises signal generating circuit, for generation of described pumping signal
The utlity model has can Long-distance Control, and can adapt to the advantage of different exciting signal sources.By the utility model, can produce the signal of specifying the two-way secondary coil that requires, to satisfy the requirement of control automatically.In addition, realize higher security by buffer circuit, and the input impedance height, the output driving force is big.
The utility model is with low cost, good reliability, control are easy, be easy to integrated and secondary development, particularly the fault simulation signal that can provide actual sensor to be difficult to realize.
Description of drawings
Read following detailed description to non-limiting example by the reference accompanying drawing, other features, objects and advantages of the present invention will become more obvious.
Fig. 1 is LVDT type differential transformer transducer structural representation;
Fig. 2 is the utility model differential transformer transducer analogue means synoptic diagram;
Fig. 3 is the utility model differential transformer transducer analogue means detailed maps;
Fig. 4 is the output isolation circuit schematic diagram of the utility model embodiment.
Embodiment
See also Fig. 2, analogue means comprises communication interface, analog controlling unit, first, second signal processing unit and first, second output unit.
The input end of communication interface is connected with remote user end, with the connected mode of remote user end can be common wired mode or wireless mode, the output terminal of communication interface is connected with the input of analog controlling unit.Communication interface is used for receiving instruction, and the instruction of reception comprises secondary coil A instruction, secondary coil B instruction, analogue stimulus signal instruction, and command adapted thereto is sent to analog controlling unit.Analog controlling unit links to each other with first, second signal processing unit respectively, controls simulation secondary coil A that the output of first, second signal processing unit changes in the opposite direction and the signal of B, and it is fed back to analog controlling unit.Analog controlling unit is according to after the feedback signal that receives, and then judges that signal that signal processing unit produces is whether consistent with the signal that the instruction of reception need produce.
Because analogue means is the signal of simulating different secondary coils, so it need produce two signals that variation tendency is opposite.
Fig. 3 has described the analogue means among Fig. 2 in more detail, and wherein, analog controlling unit comprises digital processing unit; First signal processing unit comprises first digital regulation resistance, the first ratio amplifying circuit and first buffer circuit; The secondary signal processing unit also comprises corresponding digital regulation resistance, ratio amplifying circuit and buffering circuit; First output unit comprises first output isolation circuit, and second output unit comprises second output isolation circuit; Analogue means also comprises first signal modulation circuit and secondary signal modulation circuit.
Analogue means can also comprise signal generating circuit, and the instruction that is used for sending according to analog controlling unit produces the frequency of satisfying the demand, the pumping signal of amplitude, and the input digit potentiometer.Certainly, analogue means also can receive outside pumping signal, namely is not the signal that is produced by analogue means self.In order to protect internal circuit, utilize input isolation circuit to receive usually and transmit external signal, then the input digit potentiometer.The output of input isolation circuit can be coupled to follow circuit by capacitive coupling or alternate manner, and the intercepting AC compounent with the pre-service pumping signal, is adjusted into its amplitude the signal of following that meets the demands.Often can not directly be connected between pumping signal and the digital regulation resistance, so need input isolation circuit, give digital regulation resistance by follow circuit output datum then.
Above-mentioned digital processing unit, for example single-chip microcomputer, DSP etc., the digital regulation resistance that is used for control subordinate, when digital processing unit receives the instruction of secondary coil A and B from communication interface, be converted into the steering order of digital regulation resistance, when receiving the analogue stimulus signal instruction, then be converted into the steering order of signal generating circuit.Input isolation circuit then is used for isolating the pumping signal of input, and protection higher level circuit generally can be selected isolating transformer for use.Follow circuit, for example the follow circuit that is made of amplifier is used for receiving the signal of external drive signal or signal generating circuit generation, and adjusts the amplitude of the signal that receives, and the signal after will adjusting exports digital regulation resistance to.First, second digital regulation resistance exports the signal that receives to subsequent conditioning circuit in proportion under digital processor controls, thereby obtains the pre-simulating signal of two-way that proportionate relationship meets the teleinstruction requirement.The AC compounent of the pre-simulating signal of intercepting two-way; respectively after first, second ratio amplifying circuit is realized gain-adjusted; export first, second output isolation circuit respectively to by first, second buffer circuit respectively; buffer circuit can be protected front stage circuits, and improves the load capacity of two-way simulating signal.First, second output isolation circuit, the simulating signal that is used for isolating output can be protected output-stage circuit, generally selects isolating transformer for use.Signal modulation circuit is used for drawing back simulation secondary coil A and B signal, makes its suitable input digit processor, and the simulation secondary coil A after the modulation that receives of digital processing unit basis and B signal to be judging whether to produce the signal of appointment, and adjusts accordingly.Wherein, signal modulation circuit can be selected corresponding signal modulating method and circuit according to the actual requirements, such as filtering, copped wave etc., makes feedback signal be fit to the input of digital processing unit.
By above-mentioned, when one tunnel pumping signal, after input is isolated and is carried out which amplitude modulation, carry out ratio output through the two-way digital regulation resistance, ratio output obtains the satisfactory pre-simulating signal of two-way proportionate relationship by the instruction control of digital processing unit, and pre-simulating signal is amplified and the buffering circuit through ratio, isolated by output again, obtain the simulating signal that amplitude, ratio meet the demands.
First output isolation circuit and second output isolation circuit all can adopt isolating transformer, and Fig. 4 is the exemplary plot of the isolating transformer of output stage.Input signal V
In1, V
In2Be the AC signal after front stage circuits is handled, by the isolating transformer of output stage, can obtain simulating secondary coil A, the B signal is respectively: A1 and A2, B1 and B2 then simulate the voltage U of secondary coil A
ABe the electric potential difference on A1 and the A2.
In addition in order output signal to be fed back to the digital signal processor of prime, so isolating transformer also produces feedback signal AT, BT.Feedback signal AT, BT respectively by behind first, second signal modulation circuit, can be used for digital signal processor.
The fault simulation signal that the utility model can also provide actual sensor to be difficult to realize.
When using actual sensor, the absolute value of secondary coil A and the variable quantity of B is equal, polarity is opposite, thus the electromotive force on the secondary coil A and the electromotive force on the B and be certain value, i.e. U
A+ U
B=C, wherein C is constant.But during actual the use, real coil can break down unavoidably, U may occur
A+ U
B＞C, or U
A+ U
BThe situation of＜C, this is difficult to simulate when using the actual sensor experiment.
The utility model then can be simulated this kind situation by the digital processor controls digital regulation resistance.Digital processing unit produces the digital regulation resistance steering order, increases the export ratio of first digital regulation resistance, keeps the export ratio of second digital regulation resistance, and the variable quantity of last simulation secondary coil a-signal U occurs greater than the variable quantity of simulation secondary coil B signal
A+ U
BThe situation of＞C, like this then the situation can former-wound coil damaged provides rich data more.In like manner, also can produce U
A+ U
BThe situation of＜C is as long as digital processing unit produces corresponding signal.
Above-described specific descriptions; purpose to invention; technical scheme and beneficial effect further describe; institute it should be understood that the above only is specific embodiment of the utility model, is used for explaining the utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. the analogue means of a differential transformer transducer comprises at least two output units, is used for the different simulation secondary coil signal of output, it is characterized in that:
Described analogue means also comprises analog controlling unit, and at least two signal processing units, and wherein, described signal processing unit also comprises bleeder mechanism;
Described analog controlling unit links to each other with described two signal processing units respectively at least, and specifies described signal processing unit by described bleeder mechanism the pumping signal that receives to be transferred to corresponding described output unit respectively in the ratio of described analog controlling unit appointment.
2. analogue means as claimed in claim 1 is characterized in that, described bleeder mechanism comprises digital regulation resistance, and described digital regulation resistance is connected with described analog controlling unit, and output is by the signal of described analog controlling unit designated ratio.
3. analogue means as claimed in claim 2 is characterized in that, described signal processing unit further comprises the ratio amplifying circuit, links to each other with described digital regulation resistance, is used for adjusting the amplitude of described digital regulation resistance output signal.
4. analogue means as claimed in claim 3 is characterized in that, described signal processing unit also comprises buffer circuit, is connected in described ratio amplifying circuit, is used for the load capacity of the output signal of the described ratio amplifying circuit of raising.
5. analogue means as claimed in claim 1, it is characterized in that, described analogue means also comprises at least two signal modulation circuits, link to each other with described output unit respectively, the described simulation secondary coil signal that is used for the described output unit output of modulation, and the described simulation secondary coil signal feedback after will modulating is to described analog controlling unit.
6. analogue means as claimed in claim 1 is characterized in that, described output unit comprises output isolation circuit, is used for isolating the simulating signal of output.
7. analogue means as claimed in claim 6 is characterized in that, described output isolation circuit is isolating transformer.
8. analogue means as claimed in claim 1 is characterized in that, described analogue means also comprises input isolation circuit, is used for isolating described pumping signal.
9. analogue means as claimed in claim 8 is characterized in that, described input isolation circuit is isolating transformer.
10. as each described analogue means of claim 1 to 9, it is characterized in that described analogue means also comprises signal generating circuit, for generation of described pumping signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320003307 CN203118307U (en) | 2013-01-05 | 2013-01-05 | Simulated device for differential transformer type sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320003307 CN203118307U (en) | 2013-01-05 | 2013-01-05 | Simulated device for differential transformer type sensor |
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|---|---|
| CN203118307U true CN203118307U (en) | 2013-08-07 |
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| CN 201320003307 Expired - Lifetime CN203118307U (en) | 2013-01-05 | 2013-01-05 | Simulated device for differential transformer type sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773786A (en) * | 2016-12-27 | 2017-05-31 | 北京润科通用技术有限公司 | A kind of RVDT signal simulations circuit, method and device |
| CN108534819A (en) * | 2018-06-04 | 2018-09-14 | 西安太世德航空电器有限公司 | A kind of constant current or constant pressure sensor analog system and method |
-
2013
- 2013-01-05 CN CN 201320003307 patent/CN203118307U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773786A (en) * | 2016-12-27 | 2017-05-31 | 北京润科通用技术有限公司 | A kind of RVDT signal simulations circuit, method and device |
| CN108534819A (en) * | 2018-06-04 | 2018-09-14 | 西安太世德航空电器有限公司 | A kind of constant current or constant pressure sensor analog system and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130807 |
|
| CX01 | Expiry of patent term |