CN203535400U - Linear current output module for AI instrument - Google Patents
Linear current output module for AI instrument Download PDFInfo
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- CN203535400U CN203535400U CN201320617633.8U CN201320617633U CN203535400U CN 203535400 U CN203535400 U CN 203535400U CN 201320617633 U CN201320617633 U CN 201320617633U CN 203535400 U CN203535400 U CN 203535400U
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- 230000003321 amplification Effects 0.000 claims abstract description 30
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 30
- 238000002955 isolation Methods 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000003287 optical effect Effects 0.000 abstract 3
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000013473 artificial intelligence Methods 0.000 description 14
- 230000015556 catabolic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model discloses a linear current output module for an AI instrument. The module is connected to a control chip of the AI instrument and comprises a power supply unit, a current limiting unit, an optical coupler isolation unit, a first level current amplification unit, a second level current amplification unit, a linear filter unit and a voltage protection unit. The control chip, the current limiting unit, the optical coupler isolation unit, the first level current amplification unit, the linear filter unit, the second level current amplification unit and the voltage protection unit are electrically connected one by one. The power supply unit supplies power to the module. The module combines the optical coupler chip, linear filtering and a comparing amplifier capable of two-level amplification to achieve linear output. The module, which is simple in circuit structure and cheap in cost, reduces noise and enhances anti-interference capability through the voltage protection unit, the linear filter unit and a voltage stabilization unit.
Description
Technical field
The utility model relates to industrial instrument and meter for automation, is specifically related to AI(artificial intelligence) the linear current output module of instrument.
Background technology
At present, AI (artificial intelligence) instrument is widely used in industrial automation, due to its incomparable characteristics and advantages, be exemplified below: (1) precision is high: utilize in-built microprocessor, can measure in real time static pressure, the impact of temperature variation on detecting element, by data processing, to non-linear, proofread and correct, hysteresis and repdocutbility are compensated, make output signal more accurate.Generalized case, precision is maximum range ± 0.1%, digital signal can reach ± and 0.075%.(2) function is strong: have the calculation function of Various Complex, rely on internal microprocessor and storer, can carry out evolution, temperature pressure compensation and various complex calculations.(3) measurement range is wide: range ratio can reach 40:1 or 100:1, and migration amount can reach 1900% and-200%.(4) communication function is strong: have two kinds of way of outputs of analog quantity and digital quantity (as HART agreement), for realizing field bus communication, lay a good foundation.(5) perfect self-diagnostic function: the fail result information that can find AI instrument self diagnosis by communicator.
But, at present for the circuit module of AI instrument, generally its output module has that noise is large, the shortcoming of poor anti jamming capability, although and some follow-on output modules have been alleviated noise, interference problem to a certain extent, but its circuit is complicated, can not extensively promote.
Utility model content
Therefore, for above-mentioned problem, the utility model proposes a kind of improved linear current output module for AI instrument, in the situation that wananty costs is cheap, reduce noise, strengthen its antijamming capability, thereby solve the deficiency of prior art.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is, a kind of linear current output module for AI instrument, be connected to the control chip of AI instrument, it comprises power supply unit, current limliting unit, light-coupled isolation unit, first order current amplification unit, second level current amplification unit, linear filtering unit and voltage protection unit, described control chip, current limliting unit, light-coupled isolation unit, first order current amplification unit, linear filtering unit, second level current amplification unit and voltage protection unit are electrically connected in turn, power supply unit is this linear current output module power supply.The control signal of control chip arrives light-coupled isolation unit through current limliting unit and carries out photoelectricity isolation; after through the two-stage electric current of first order current amplification unit and second level current amplification unit, amplify and the filtering of linear filtering unit, finally by voltage protection unit, whole circuit is protected.
Further, this linear current output module also comprises voltage regulation unit, and this voltage regulation unit is serially connected with between light-coupled isolation unit and first order current amplification unit.
Further, described current limliting unit comprises resistance R 6.Described light-coupled isolation unit comprises opto-coupler chip O1, described first order current amplification unit adopts comparison amplifier U3A, second level current amplification unit adopts comparison amplifier U3B to realize, described linear filtering unit comprises resistance R 5, resistance R 8, resistance R 9, variohm VR1, electrochemical capacitor E2, electrochemical capacitor E3, one end of resistance R 5 is connected to the output terminal of comparison amplifier U3A, the other end of resistance R 5 connects one end of variohm VR1 and the anode of electrochemical capacitor E2, the one end that connects electrochemical capacitor E3 after the other end resistance in series R8 of variohm VR1, the positive input terminal of one end of resistance R 9 and comparison amplifier U3B, the other end of electrochemical capacitor E3, the other end of the other end of resistance R 9 and electrochemical capacitor E2 connects.Described voltage protection unit comprises diode D1, for preventing voltage breakdown.
The utility model is for the linear current output module of AI instrument, and the comparison amplifier combination that adopts opto-coupler chip, linear filtering and two-stage to amplify, realizes the linearity output of linear current output module; Circuit structure of the present utility model is simple, with low cost, by voltage protection unit, linear filtering unit and voltage regulation unit, has reduced noise simultaneously, has strengthened antijamming capability.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Now with embodiment, the utility model is further illustrated by reference to the accompanying drawings.
With reference to Fig. 1; a kind of linear current output module for AI instrument of the present utility model; be connected to the control chip of AI instrument; it comprises power supply unit, current limliting unit, light-coupled isolation unit, first order current amplification unit, second level current amplification unit, linear filtering unit and voltage protection unit; described control chip, current limliting unit, light-coupled isolation unit, first order current amplification unit, linear filtering unit, second level current amplification unit and voltage protection unit are electrically connected in turn, and power supply unit is this linear current output module power supply.
In addition, as a scheme preferably, this linear current output module also comprises voltage regulation unit, and this voltage regulation unit is serially connected with between light-coupled isolation unit and first order current amplification unit.
Fig. 2 is the circuit theory diagrams of an embodiment of the present utility model.With reference to Fig. 2, in the present embodiment, described power supply unit is used the 12V insulating power supply in AI instrument.Described current limliting unit is to be realized by resistance R 6, and described light-coupled isolation unit is realized by opto-coupler chip O1, and described voltage regulation unit is realized by resistance R 1, resistance R 2 and voltage stabilizing diode.Described first order current amplification unit adopts comparison amplifier U3A, second level current amplification unit adopts comparison amplifier U3B to realize, described linear filtering unit comprises resistance R 5, resistance R 8, resistance R 9, variohm VR1, electrochemical capacitor E2, electrochemical capacitor E3, one end of resistance R 5 is connected to the output terminal of comparison amplifier U3A, the other end of resistance R 5 connects one end of variohm VR1 and the anode of electrochemical capacitor E2, the one end that connects electrochemical capacitor E3 after the other end resistance in series R8 of variohm VR1, the positive input terminal of one end of resistance R 9 and comparison amplifier U3B, the other end of electrochemical capacitor E3, the other end of the other end of resistance R 9 and electrochemical capacitor E2 connects.Described voltage protection unit comprises diode D1, for preventing voltage breakdown.
In foregoing circuit; the control signal of control chip is carried out after photoelectricity isolation through the opto-coupler chip O1 of the resistance R 6 arrival light-coupled isolation unit of current limliting unit; as input signal; filtering through the first order current amplification unit (resistance R 1, resistance R 2 and voltage stabilizing diode) of voltage regulation unit and the amplification of the two-stage electric current of second level current amplification unit and linear filtering unit; finally by voltage protection unit, circuit is protected, prevented voltage breakdown.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but those skilled in the art should be understood that; within not departing from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection domain of the present utility model.
Claims (6)
1. the linear current output module for AI instrument; be connected to the control chip of AI instrument; it is characterized in that: comprise power supply unit, current limliting unit, light-coupled isolation unit, first order current amplification unit, second level current amplification unit, linear filtering unit and voltage protection unit; described control chip, current limliting unit, light-coupled isolation unit, first order current amplification unit, linear filtering unit, second level current amplification unit and voltage protection unit are electrically connected in turn, and power supply unit is this linear current output module power supply.
2. linear current output module according to claim 1, is characterized in that: described current limliting unit comprises resistance R 6.
3. linear current output module according to claim 1, is characterized in that: described light-coupled isolation unit comprises opto-coupler chip O1.
4. linear current output module according to claim 1, is characterized in that: described first order current amplification unit adopts comparison amplifier U3A, and second level current amplification unit adopts comparison amplifier U3B to realize.
5. linear current output module according to claim 4, it is characterized in that: described linear filtering unit comprises resistance R 5, resistance R 8, resistance R 9, variohm VR1, electrochemical capacitor E2, electrochemical capacitor E3, one end of resistance R 5 is connected to the output terminal of comparison amplifier U3A, the other end of resistance R 5 connects one end of variohm VR1 and the anode of electrochemical capacitor E2, the one end that connects electrochemical capacitor E3 after the other end resistance in series R8 of variohm VR1, the positive input terminal of one end of resistance R 9 and comparison amplifier U3B, the other end of electrochemical capacitor E3, the other end of the other end of resistance R 9 and electrochemical capacitor E2 connects.
6. linear current output module according to claim 1, is characterized in that: described voltage protection unit comprises diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617633.8U CN203535400U (en) | 2013-10-09 | 2013-10-09 | Linear current output module for AI instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617633.8U CN203535400U (en) | 2013-10-09 | 2013-10-09 | Linear current output module for AI instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203535400U true CN203535400U (en) | 2014-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320617633.8U Expired - Lifetime CN203535400U (en) | 2013-10-09 | 2013-10-09 | Linear current output module for AI instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203535400U (en) |
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2013
- 2013-10-09 CN CN201320617633.8U patent/CN203535400U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140409 |