CN107592092A - Segmented belt bandpass filter in high-frequency signal collection - Google Patents
Segmented belt bandpass filter in high-frequency signal collection Download PDFInfo
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- CN107592092A CN107592092A CN201710971652.3A CN201710971652A CN107592092A CN 107592092 A CN107592092 A CN 107592092A CN 201710971652 A CN201710971652 A CN 201710971652A CN 107592092 A CN107592092 A CN 107592092A
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- 238000000034 method Methods 0.000 claims abstract description 27
- 238000012545 processing Methods 0.000 claims abstract description 12
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 9
- 238000013461 design Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 101000726148 Homo sapiens Protein crumbs homolog 1 Proteins 0.000 description 2
- 102100027331 Protein crumbs homolog 1 Human genes 0.000 description 2
- 101000825534 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 40S ribosomal protein S2 Proteins 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 101000610557 Homo sapiens U4/U6 small nuclear ribonucleoprotein Prp31 Proteins 0.000 description 1
- 101001109965 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 60S ribosomal protein L7-A Proteins 0.000 description 1
- 101001109960 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 60S ribosomal protein L7-B Proteins 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 102100040118 U4/U6 small nuclear ribonucleoprotein Prp31 Human genes 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
Segmented belt bandpass filter in high-frequency signal collection, it is characterized in that amplify including front end, wave filter group, signal behavior switching part, wave filter group includes the LC bandpass filters of several different center frequencies and bandwidth, signal behavior switching part is to be connected to programme controlled analog switch by control unit respectively in the process signal input and process signal output end of several LC bandpass filters, control unit is according to the centre frequency and bandwidth of input signal, effective high pass is carried out to input signal from corresponding LC bandpass filters, low pass, band logical, band resistance is handled.Compared with the prior art the present invention, has high-frequency signal frequency section can control the input signal of processing frequency height the advantages of.
Description
Technical field
The present invention relates to a kind of power equipment state monitoring technical equipment.
Background technology
At the scene in the high-frequency signal acquisition system of grid power equipment status monitoring, it can all contain substantially in measured signal
The noise interferences of heterogeneity feature, and such noise signal can not avoid, therefore it is certain in signal acquiring system
The signal processing means such as high pass, low pass, band logical, band resistance can be applied to.All can be first according to tested letter when circuit is designed
Number frequency characteristic design corresponding wave filter, once circuit design is good, the parameter is with regard to substantially stationary, but if power train
Live measured signal has larger center bin skew in system, then and the circuit can not just meet the needs of test, or
Manually the method for Context switches wave filter come meet test requirement, but its applicability especially scene on-line monitoring should
In, its drawback is more obvious.The programmable filter chip and circuit of existing controllable frequency height, its controllable input frequency
Rate only up to reach hundreds of KHz, the application effect unobvious for high-frequency signal.
The content of the invention
It is an object of the invention to provide a kind of input signal that processing frequency height is can control in high-frequency signal frequency section
High-frequency signal collection in segmented belt bandpass filter.
The present invention is achieved in that including front end amplification, wave filter group, signal behavior switching part, preposition amplification pair
Signal is handled, and to improve signal intensity, wave filter group includes the LC bandpass filters of several different center frequencies and bandwidth,
By configuring different inductance capacitance parameters in several LC bandpass filters, in making several LC bandpass filters have processing different
The ability of frequency of heart and bandwidth, signal behavior switching part are the process signal input and processing in several LC bandpass filters
Signal output part is connected to programme controlled analog switch by control unit respectively, and control unit is according to the center frequency of input signal
Rate and bandwidth, corresponding control signal is exported according to pre-set programs, control is corresponding with the centre frequency and bandwidth of input signal
The connected analog switch conducting of LC bandpass filters, it is effective so as to which corresponding LC bandpass filters can be selected to carry out input signal
High pass, low pass, band logical, band resistance handle.
Due to it is default it is multiple can effectively handle the LC bandpass filters of different frequency and bandwidth signal, and pass through control unit
According to the frequency and bandwidth characteristic of institute's detection signal, corresponding control signal is exported, controls corresponding analog switch to turn on, so as to
LC bandpass filters corresponding to selection are handled institute's detection signal, it is thereby achieved that can control in high-frequency signal frequency section
The purpose of the input signal of processing frequency height.
Compared with the prior art the present invention, has the input signal that processing frequency height is can control in high-frequency signal frequency section
The advantages of.
Brief description of the drawings
Fig. 1 is the circuit block diagram of the present invention；
Fig. 2 is the circuit diagram with passband filtering group part of the present invention；
Fig. 3 is the design sketch of use example 1；
Fig. 4 is the design sketch of use example 2.
Embodiment
The present invention is described in further detail in conjunction with drawings and examples：
As shown in Figure 1, 2, the present invention includes front end amplification A, wave filter group B, signal behavior switching part, rear end amplification C, filtering
Device group B includes the LC bandpass filters 1 of 10 different center frequencies and bandwidth, by being configured not in 10 LC bandpass filters 1
Same inductance capacitance parameter, the ability for making 10 LC bandpass filters 1 that there is processing different center frequency and bandwidth, signal behavior
Switching part be 10 LC bandpass filters 1 process signal input and process signal output end be connected to respectively it is single by control
First D programme controlled analog switch E, as shown in Fig. 2 the process signal input of 10 LC bandpass filters 1 and processing are believed
The signal behavior switching part of number output end（Analog switch E）Respectively by three high speed signal switching devices（AD G904 chips）
2nd, 3 composition, using high speed signal switching device, the relation curve of its insertion loss and frequency is very flat, turns off isolation performance
It is excellent, as shown in Fig. 2 high-frequency signal comes in be connected to the input of front-end amplifier from CN1, by four-stage amplifier circuit, letter
Number（BPF）It is connected to the input of three high speed signal switching devices 2 of the process signal input of 10 LC bandpass filters 1
（BPF）（After the input of a wherein high speed signal switching device is connected with the output signal that front end is amplified, by two BPF111,
BPF111, BPF112 the pin point connection with another two high speed signal switching device respectively of BPF112 pin）, 10 LC bandpass filters
Three high speed signal switching devices 2 of 1 process signal input share 10 conductive channels respectively with 10 LC bandpass filterings
The process signal input of device 1 is connected, three high speed signals switching of the process signal input of 10 LC bandpass filters 1
There is control signal input to be connected with the control signal output of control unit on device 2, the processing of 10 LC bandpass filters 1
Three high speed signal switching devices 3 of signal output part share 10 conductive channels (BPF11, BPF12, BPF13, BPF14,
BPF15, BPF16, BPF17, BPF19, BPF19, BPF110) the process signal output end with 10 LC bandpass filters 1 respectively
Be connected, have control signal in three high speed signal switching devices 3 of the process signal output end of 10 LC bandpass filters 1
Input is connected with the control signal output of control unit, three height of the process signal output end of 10 LC bandpass filters 1
The output end of fast signal switching apparatus 3 is connected with rear end amplification（The wherein output end BPF15 of a high speed signal switching device is with after
After the connection for holding amplification, pass through two BPF12, BPF13 pin BPF12, BPF13 pin with another two high speed signal switching device respectively
Divide connection）, the output end of 10 LC bandpass filters 1（Potentiometer RP3 to RP12）Potentiometer（Potentiometer RP3, RP4, RP5,
RP6、RP7、RP8、RP9、RP10、RP11、RP12）The signal amplitude of each passage Yong Lai not controlled to meet the system of rear class signal
One, in amplifying C in rear end, one group of logafier 4 is first passed around, expands the measurement range of signal, U6C, D1, D2 are formd
Detection shaping to signal, rear class power amplification is carried out to signal to meet that acquisition system is wanted to signal finally by U8 and U9
Ask.Its circuit-board processes is 1.6mm dual platens, and two sides connects up, and Surface Mount mixes welding, chemical plating stannum with plug-in unit
In order to ensure the optimum efficiency of wave filter, the PCB pad layout sides that circuit board wiring requires in strict accordance with filter vendor
Formula.To realize the maximum isolation of input and output end, added with electroplating bath on circuit, so contribute to realize that sufficiently band is outer
Decay and the minimum interior ripple of band.Other connector and the transmission line of switching device are designed to co-planar waveguide.Fig. 3 is in practice
Input signal is 140MHz, with a width of 11.82MHz（Filter effect figure 1DB), Fig. 4 is that input signal is 140MHz, with a width of
20.7MHz (1DB) filter effect figure.Input and output signal amplitude is adjustable, and output end can directly and data acquisition system
System connection, realizes the collection to high-frequency signal.Control section is Phototube Coupling 5, incoming signal level 3--12V, remote control
Signal is by the port come the switching of control centre's frequency and bandwidth.The circuit using flexible, it can be carried out according to actual conditions
Increase or decrease the quantity of wave filter and the quantity of switching device.
Claims (2)
1. the segmented belt bandpass filter in high-frequency signal collection, it is characterised in that including front end amplification, wave filter group, signal choosing
Switching part is selected, preposition amplification is handled signal, and to improve signal intensity, wave filter group includes several different center frequencies
And the LC bandpass filters of bandwidth, by configuring different inductance capacitance parameters in several LC bandpass filters, make several LC bands
Bandpass filter has the ability of processing different center frequency and bandwidth, and signal behavior switching part is in several LC bandpass filters
Process signal input and process signal output end be connected to programme controlled analog switch by control unit respectively, control is single
Member exports corresponding control signal, control and input signal according to the centre frequency and bandwidth of input signal according to pre-set programs
Centre frequency and bandwidth corresponding to the connected analog switch conducting of LC bandpass filters, so as to can be from the filter of corresponding LC band logicals
Ripple device carries out effective high pass, low pass, band logical, band resistance processing to input signal.
2. the segmented belt bandpass filter in high-frequency signal collection according to claim 1, it is characterised in that several LC bands
The process signal input of bandpass filter and the signal behavior switching part of process signal output end are respectively by three high speed signals
Switching device forms, and high speed signal switching device uses AD G904 chips, and front end amplified signal is connected to several LC bandpass filters
Process signal input three high speed signal switching devices input, several LC bandpass filters process signal input
Three high speed signal switching devices at end share process signal of several conductive channels respectively with several LC bandpass filters and inputted
Being connected for end, has control signal in three high speed signal switching devices of the process signal input of several LC bandpass filters
Input is connected with the control signal output of control unit, three high speeds of the process signal output end of several LC bandpass filters
Signal switching apparatus shares several conductive channels and is connected respectively with the process signal output ends of several LC bandpass filters, several
There are control signal input and control in three high speed signal switching devices of the process signal output end of LC bandpass filters
The control signal output of unit is connected, three high speed signal switching devices of the process signal output end of several LC bandpass filters
Output end be signal output part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710971652.3A CN107592092A (en) | 2017-10-18 | 2017-10-18 | Segmented belt bandpass filter in high-frequency signal collection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710971652.3A CN107592092A (en) | 2017-10-18 | 2017-10-18 | Segmented belt bandpass filter in high-frequency signal collection |
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| Publication Number | Publication Date |
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| CN107592092A true CN107592092A (en) | 2018-01-16 |
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| CN201710971652.3A Pending CN107592092A (en) | 2017-10-18 | 2017-10-18 | Segmented belt bandpass filter in high-frequency signal collection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111865253A (en) * | 2020-07-08 | 2020-10-30 | 上海威固信息技术股份有限公司 | Program-controlled LC filter based on I2C protocol and sine wave generation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201096883Y (en) * | 2007-10-31 | 2008-08-06 | 武汉大学 | High band digital tuning LC filter |
| CN102098018A (en) * | 2011-03-10 | 2011-06-15 | 江苏苏美达机电有限公司 | Tunable bandpass filter system |
| JP2013102275A (en) * | 2011-11-07 | 2013-05-23 | Nec Corp | Filter circuit, and method and program for controlling the same |
| CN207559961U (en) * | 2017-10-18 | 2018-06-29 | 广州友智电气技术有限公司 | Segmented belt bandpass filter in high-frequency signal acquisition |
-
2017
- 2017-10-18 CN CN201710971652.3A patent/CN107592092A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201096883Y (en) * | 2007-10-31 | 2008-08-06 | 武汉大学 | High band digital tuning LC filter |
| CN102098018A (en) * | 2011-03-10 | 2011-06-15 | 江苏苏美达机电有限公司 | Tunable bandpass filter system |
| JP2013102275A (en) * | 2011-11-07 | 2013-05-23 | Nec Corp | Filter circuit, and method and program for controlling the same |
| CN207559961U (en) * | 2017-10-18 | 2018-06-29 | 广州友智电气技术有限公司 | Segmented belt bandpass filter in high-frequency signal acquisition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111865253A (en) * | 2020-07-08 | 2020-10-30 | 上海威固信息技术股份有限公司 | Program-controlled LC filter based on I2C protocol and sine wave generation method |
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