CN203933564U - The controlled filter circuit of a kind of intelligent hardware - Google Patents
The controlled filter circuit of a kind of intelligent hardware Download PDFInfo
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- CN203933564U CN203933564U CN201420252001.0U CN201420252001U CN203933564U CN 203933564 U CN203933564 U CN 203933564U CN 201420252001 U CN201420252001 U CN 201420252001U CN 203933564 U CN203933564 U CN 203933564U
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Abstract
The utility model discloses the controlled filter circuit of a kind of intelligent hardware, this filter circuit is by operational amplifier A 1, resistance R 1, R2 and R3, capacitor C 1 and C2 and chip I 1 the electric circuit constitute, described chip I 1 is four bidirectional analog switch CD4066 chips, input signal Vin is connected with the normal phase input end of operational amplifier A 1 through resistance R 1, circuit signal output end vo ut is connected with the output of A1, conducting and the shutoff of the control signal control circuit providing by single-chip microcomputer, by the resistance access circuit of different resistances, form the band pass filter of different center frequency, select the harmonic wave of corresponding number of times to detect, this weak biological signal of telecommunication filter circuit construction is simple, with low cost, there is good filtering, amplify, feedback, regulatory function.
Description
Technical field
The utility model belongs to electric and electronic technical field, relates in particular to the controlled filter circuit of a kind of intelligent hardware.
Background technology
Early stage harmonic wave detects and all adopts filter to realize, and exists easily and is disturbed, detects the defects such as harmonic number is few.When software FFT(fast Fourier transform) after algorithm occurs, owing to having overcome the defect of hardware harmonic wave detection mode, thereby be widely applied, in current most of intelligent power supply system, harmonic wave determination and analysis all adopts this software algorithm to realize.But in actual applications, due to the software FFT algorithm data of a complete primitive period of needs, and the harmonic number detecting as needed raises, sampled point must be multiplied, then can produce problems such as taking processor memory space is large, data operation time length, spectral aliasing, this will certainly increase very large load to CPU, even likely has influence on real-time and the stability of control system, and uses the cost that high performance processor will inevitably increase system instead.
The frequency of signal is had to optionally circuit and be called filter circuit, it can make the signal in certain particular frequency range pass through, stop this frequency range signal in addition to pass through. according to the difference of band connection frequency, can be divided into low pass (LPF), high pass (HPF), band logical (BPF) and band resistance (BEF) four kinds of filter circuits, according to having or not active element can be divided into active filter and passive filter again in filter circuit. passive filtering is, by the coupling of inductance and electric capacity, certain subharmonic current is formed to a low resistance state path, passive filtering cost is low, stable, but harmonic filtration rate generally only has 80, active power filtering is bucking-out system harmonic wave effectively, and for small-power low frequency signal, active power filtering is better than passive filter circuit overall performance, filtering harmonic wave is with better function.
Summary of the invention
The defect and the deficiency that for above-mentioned prior art, exist, the purpose of this utility model is, provide a kind of intelligent hardware controlled filter circuit, the utlity model has good filtering, amplification, feedback, regulatory function, at aspects such as low frequency signal information processing, transfer of data, inhibition interference, can be used widely
In order to realize above-mentioned task, the utility model adopts following technical solution:
The controlled filter circuit of a kind of intelligent hardware, it is characterized in that, by operational amplifier A 1, resistance R 1, R2 and R3, capacitor C 1 and C2 and chip I 1 the electric circuit constitute, input signal Vin is connected with the normal phase input end (9) of operational amplifier A 1 through resistance R 1, and circuit signal output end vo ut is connected with the output (12) of A1; Connect+5V of positive power source terminal (13) power supply of described operational amplifier A 1, connect-5V of the negative power end of A1 (11) power supply; Described resistance R 1 is connected between signal input part Vin and A1 normal phase input end (9), and described resistance R 2 is connected between capacitor C 1 and ground, and described resistance R 3 is connected between A1 inverting input (10) and its output (12); Described capacitor C 1 is connected between resistance R 1 and resistance R 2, and described capacitor C 2 is connected between A1 output (4) and ground; The control signal Vc of (0) termination microprocessor of described chip I 1, (1) of chip I 1, (2), (3), (4) end are connected with the normal phase input end 1 of operational amplifier A 1 simultaneously, and (5) of chip I 1, (6), (7), (8) end are connected with the positive output end 4 of operational amplifier A 1 by variable resistor respectively; The model of described operational amplifier A 1 is ICL7650S chip; Described chip I 1 is four bidirectional analog switch CD4066 chips.
The beneficial effects of the utility model are:
CD4066 is 4 road bidirectional analog switches, control end input high level Shi Gai road conducting, turn-off on input low level Shi Gai road, the control signal providing by single-chip microcomputer can control circuit conducting and shutoff, by the resistance access circuit of different resistances, can form the band pass filter of different center frequency, thereby the harmonic wave that can " choose " corresponding number of times detects.
The key of controlled filter circuit design is first can detect respectively the harmonic signal of a plurality of different frequencies, is secondly to carry out cycle detection to these harmonic signals.By changing the resistance of resistance, can change the centre frequency of filter, and the resistance of these 3 resistance is roughly the same.In actual applications, because CD4066 chip exists internal resistance and other disturbing factors, it is unsatisfactory that directly employing calculating gained resistance value is carried out filter effect, need to suitably finely tune the size of resistance value.By single-chip microcomputer, to the analog switch CD4066 break-make of controlling a certain road resistance that transmits control signal, can detect in measured signal whether have any subharmonic in 3 times, 5 times, 7 times, 9 times, also can carry out cycle detection to these 4 kinds of harmonic signals.When detecting the harmonic wave of other number of times or the harmonic wave that more multichannel is different is carried out to cycle detection as need, only need to change resistance, set up CD4066 chip.If need the harmonic number of detection many, also can consider to realize with digital potentiometer.
The controlled filter circuit construction of this intelligent hardware is simple, with low cost, has good filtering, amplification, feedback, regulatory function, at aspects such as low frequency signal information processing, transfer of data, inhibition interference, can be used widely.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments the utility model is further explained explanation.
Fig. 1 is the schematic diagram of the controlled filter circuit of intelligent hardware.
Embodiment
If Fig. 1 is the schematic diagram of the intelligent controlled filter circuit of hardware, this controlled filter circuit is by operational amplifier A 1, resistance R 1, R2 and R3, capacitor C 1 and C2 and chip I 1 the electric circuit constitute, input signal Vin is connected with the normal phase input end (9) of operational amplifier A 1 through resistance R 1, and circuit signal output end vo ut is connected with the output (12) of A1; Connect+5V of positive power source terminal (13) power supply of described operational amplifier A 1, connect-5V of the negative power end of A1 (11) power supply; Described resistance R 1 is connected between signal input part Vin and A1 normal phase input end (9), and described resistance R 2 is connected between capacitor C 1 and ground, and described resistance R 3 is connected between A1 inverting input (10) and its output (12); Described capacitor C 1 is connected between resistance R 1 and resistance R 2, and described capacitor C 2 is connected between A1 output (4) and ground; The control signal Vc of (0) termination microprocessor of described chip I 1, (1) of chip I 1, (2), (3), (4) end are connected with the normal phase input end 1 of operational amplifier A 1 simultaneously, and (5) of chip I 1, (6), (7), (8) end are connected with the positive output end 4 of operational amplifier A 1 by variable resistor respectively; The model of described operational amplifier A 1 is ICL7650S chip; Described chip I 1 is four bidirectional analog switch CD4066 chips.
Except above-mentioned, general technical staff of the technical field of the invention also can understand, in this explanation and illustrated specific embodiment, can further change combination.For example, single channel super low-power consumption operational amplifier A 1 can be replaced by the operational amplifier of other types according to actual condition.
Claims (3)
1. the controlled filter circuit of intelligent hardware, it is characterized in that, by operational amplifier A 1, resistance R 1, R2 and R3, capacitor C 1 and C2 and chip I 1 the electric circuit constitute, input signal Vin is connected with the normal phase input end (9) of operational amplifier A 1 through resistance R 1, and circuit signal output end vo ut is connected with the output (12) of A1; Connect+5V of positive power source terminal (13) power supply of described operational amplifier A 1, connect-5V of the negative power end of A1 (11) power supply; Described resistance R 1 is connected between signal input part Vin and A1 normal phase input end (9), and described resistance R 2 is connected between capacitor C 1 and ground, and described resistance R 3 is connected between A1 inverting input (10) and its output (12); Described capacitor C 1 is connected between resistance R 1 and resistance R 2, and described capacitor C 2 is connected between A1 output (4) and ground; The control signal Vc of (0) termination microprocessor of described chip I 1, (1) of chip I 1, (2), (3), (4) end are connected with the normal phase input end 1 of operational amplifier A 1 simultaneously, and (5) of chip I 1, (6), (7), (8) end are connected with the positive output end 4 of operational amplifier A 1 by variable resistor respectively.
2. the controlled filter circuit of a kind of intelligent hardware as claimed in claim 1, is characterized in that, the model of described operational amplifier A 1 is ICL7650S chip.
3. the controlled filter circuit of a kind of intelligent hardware as claimed in claim 1, is characterized in that, described chip I 1 is four bidirectional analog switch CD4066 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420252001.0U CN203933564U (en) | 2014-05-17 | 2014-05-17 | The controlled filter circuit of a kind of intelligent hardware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420252001.0U CN203933564U (en) | 2014-05-17 | 2014-05-17 | The controlled filter circuit of a kind of intelligent hardware |
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| Publication Number | Publication Date |
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| CN203933564U true CN203933564U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420252001.0U Expired - Fee Related CN203933564U (en) | 2014-05-17 | 2014-05-17 | The controlled filter circuit of a kind of intelligent hardware |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733398A (en) * | 2017-11-11 | 2018-02-23 | 成都优力德新能源有限公司 | A kind of controllable filter circuit of intelligent hardware |
-
2014
- 2014-05-17 CN CN201420252001.0U patent/CN203933564U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733398A (en) * | 2017-11-11 | 2018-02-23 | 成都优力德新能源有限公司 | A kind of controllable filter circuit of intelligent hardware |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Yunpeng Inventor after: Wang Shan Inventor before: Xu Yunpeng |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: XU YUNPENG TO: XU YUNPENG WANG SHAN |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20150517 |
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| EXPY | Termination of patent right or utility model |