CN207559961U - Segmented belt bandpass filter in high-frequency signal acquisition - Google Patents
Segmented belt bandpass filter in high-frequency signal acquisition Download PDFInfo
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- CN207559961U CN207559961U CN201721341535.0U CN201721341535U CN207559961U CN 207559961 U CN207559961 U CN 207559961U CN 201721341535 U CN201721341535 U CN 201721341535U CN 207559961 U CN207559961 U CN 207559961U
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Abstract
Segmented belt bandpass filter in high-frequency signal acquisition, it is characterized by comprising front end amplifications, 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 be several LC bandpass filters processing signal input part and processing signal output end be connected to respectively by control unit program control analog switch, control unit is according to the centre frequency and bandwidth of input signal, corresponding LC bandpass filters is selected to carry out effective high pass to input signal, low pass, band logical, band resistance is handled.Compared with the prior art the utility model, has the advantages that the input signal that can control processing frequency height in high-frequency signal frequency section.
Description
Technical field
The utility model is related 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, can all it contain substantially in measured signal
The noise interferences of heterogeneity feature, and such noise signal can not avoid, therefore certain in signal acquiring system
The signal processing means such as high pass, low pass, band logical, band resistance can be applied to.It 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 offset in system, then the circuit can not just meet the needs of test or
The requirement of test is met by the method for manual Context switches wave filter, but its applicability especially scene on-line monitoring should
In, drawback is more obvious.The programmable filter chip and circuit of existing controllable frequency height, controllable input frequency
Rate only up to reach hundreds of KHz, the application effect unobvious for high-frequency signal.
Invention content
The purpose of this utility model is to provide a kind of inputs that can control processing frequency height in high-frequency signal frequency section
Segmented belt bandpass filter in the high-frequency signal acquisition of signal.
The utility model is realized in this way including front end amplification, wave filter group, signal behavior switching part, preceding storing
Signal is handled greatly, to improve signal strength, wave filter group includes the LC band logicals filter of several different center frequencies and bandwidth
Wave device by the way that different inductance capacitance parameters is configured in several LC bandpass filters, makes several LC bandpass filters have processing
The ability of different center frequency and bandwidth, signal behavior switching part are the processing signal input parts in several LC bandpass filters
It is connected to respectively by the analog switch of the program control of control unit, the control signal output of control unit with processing signal output end
It is connected with the control signal input of corresponding analog switch, which is the centre frequency and band with input signal
The analog switch that wide corresponding LC bandpass filters are connected, control unit is according to the centre frequency and bandwidth of input signal, foundation
The corresponding control signal of pre-set programs output, controls LC bandpass filters phase corresponding with the centre frequency and bandwidth of input signal
Analog switch conducting even, so that corresponding LC bandpass filters can be selected to carry out effective high pass, low pass, band to input signal
Logical, band resistance is handled.
The processing signal input part of several LC bandpass filters and the signal behavior switching part point for handling signal output end
It is not made of three high speed signal switching devices, high speed signal switching device uses AD G904 chips, and front end amplified signal is connected to
The input terminal of three high speed signal switching devices of the processing signal input part of several LC bandpass filters, several LC bandpass filterings
Three high speed signal switching devices of the processing signal input part of device share several conductive channels respectively with several LC bandpass filterings
The processing signal input part of device is connected, three high speed signals switching dress of the processing signal input part of several LC bandpass filters
Putting has control signal input to be connected with the control signal output of control unit, the processing signal of several LC bandpass filters
Three high speed signal switching devices of output terminal share processing signal of several conductive channels respectively with several LC bandpass filters
Being connected for output terminal, has control in three high speed signal switching devices of the processing signal output end of several LC bandpass filters
Signal input part is connected with the control signal output of control unit, three of the processing signal output end of several LC bandpass filters
The output terminal of high speed signal switching device is signal output end.
Multiple the LC bandpass filters of different frequency and bandwidth signal are can effectively deal with, and pass through control unit due to default
According to the frequency and bandwidth characteristic of detected signal, corresponding control signal is exported, corresponding analog switch is controlled to be connected, so as to
Corresponding LC bandpass filters is selected to handle detected 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 utility model, has the input that can control processing frequency height in high-frequency signal frequency section
The advantages of signal.
Description of the drawings
Fig. 1 is the circuit block diagram of the utility model；
Fig. 2 is the circuit diagram with passband filtering group part of the utility model；
Fig. 3 is the design sketch of use example 1；
Fig. 4 is the design sketch of use example 2.
Specific embodiment：
The utility model is described in further detail in conjunction with drawings and examples：
As shown in Figure 1, 2, the utility model is put including front end amplification A, wave filter group B, signal behavior switching part, rear end
Big C, wave filter group B include the LC bandpass filters 1 of 10 different center frequencies and bandwidth, by 10 LC bandpass filters
The different inductance capacitance parameter of 1 configuration, 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 processing signal input part and processing signal output end be connected to respectively
The analog switch E controlled by the program of control unit D, as shown in Fig. 2, the processing signal input part of 10 LC bandpass filters 1
With the signal behavior switching part of processing signal 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 insertion loss and frequency is very flat, shutdown
Isolation performance is excellent, as shown in Fig. 2, high-frequency signal comes in be connected to the input terminal of front-end amplifier from CN1, amplifies by level Four
Circuit, signal（BPF）It is connected to three high speed signal switching devices 2 of the processing signal input part of 10 LC bandpass filters 1
Input terminal（BPF）（After the input terminal of a wherein high speed signal switching device is connect with the output signal that front end is amplified, pass through two
BPF111, BPF112 foot connect respectively with BPF111, BPF112 foot point of another two high speed signal switching device）, 10 LC bands
Three high speed signal switching devices 2 of the processing signal input part of bandpass filter 1 share 10 conductive channels respectively with 10 LC
The processing signal input part of bandpass filter 1 is connected, three high speeds of the processing signal input part of 10 LC bandpass filters 1
There is control signal input to be connected with the control signal output of control unit on signal switching apparatus 2,10 LC bandpass filterings
Three high speed signal switching devices 3 of the processing signal output end of device 1 share 10 conductive channels (BPF11, BPF12, BPF13,
BPF14, BPF15, BPF16, BPF17, BPF19, BPF19, BPF110) the processing signal with 10 LC bandpass filters 1 respectively
Being connected for output terminal, has control in three high speed signal switching devices 3 of the processing signal output end of 10 LC bandpass filters 1
Signal input part processed is connected with the control signal output of control unit, the processing signal output end of 10 LC bandpass filters 1
The output terminal of three high speed signal switching devices 3 is connected with rear end amplification（The wherein output terminal of a high speed signal switching device
After the connection of BPF15 and rear end amplification, by two BPF12, BPF13 feet respectively with another two high speed signal switching device
BPF12, BPF13 foot point connection）, the output terminal of 10 LC bandpass filters 1（Potentiometer RP3 to RP12）Potentiometer（Current potential
Device RP3, RP4, RP5, RP6, RP7, RP8, RP9, RP10, RP11, RP12）The signal amplitude of each channel Yong Lai not controlled to expire
The unification of sufficient rear class signal in amplifying C in rear end, first passes around one group of logafier 4, expands the measurement range of signal,
U6C, D1, D2 form the detection shaping to signal, and carry out rear class power amplification to signal finally by U8 and U9 is adopted with meeting
Requirement of the collecting system to signal.Its circuit-board processes is 1.6mm dual platens, and two sides wiring, Surface Mount mixes welding with plug-in unit, chemical
It is tin plating.
In order to ensure the optimum efficiency of wave filter, the PCB pad cloth that circuit board wiring is required in strict accordance with filter vendor
Office's mode.To realize the maximum isolation of input terminal and output terminal, added with electroplating bath on circuit, help to realize so adequately
Attenuation outside a channel and the minimum interior ripple of band.In addition connector and the transmission line of switching device are designed to co-planar waveguide.Fig. 3 is real
Input signal is 140MHz, bandwidth 11.82MHz in border（Filter effect figure 1DB), it is 140MHz that Fig. 4, which is input signal, band
Width is the filter effect figure of 20.7MHz (1DB).Input and output signal amplitude is adjustable, and output terminal can be adopted directly with data
Collecting system connects, and realizes the acquisition to high-frequency signal.Control section be Phototube Coupling 5, incoming signal level 3--12V, remotely
Control signal by the port come the switching of control centre's frequency and bandwidth.The circuit using flexible, can be according to actual conditions
It carries out increasing or decreasing the quantity of wave filter and the quantity of switching device.
Claims (2)
1. the segmented belt bandpass filter in high-frequency signal acquisition, it is characterised in that selected including front end amplification, wave filter group, signal
Switching part is selected, wave filter group includes the LC bandpass filters of several different center frequencies and bandwidth, signal behavior switching part
It is to be connected to program by control unit respectively in the processing signal input part and processing signal output end of several LC bandpass filters
The analog switch of control, the control signal output of control unit are connected with the control signal input of corresponding analog switch, the phase
The analog switch answered is the analog switch that LC bandpass filters corresponding with the centre frequency of input signal and bandwidth are connected.
2. the segmented belt bandpass filter in high-frequency signal acquisition according to claim 1, it is characterised in that several LC bands
The processing signal input part of bandpass filter and the signal behavior switching part of processing 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
Processing signal input part three high speed signal switching devices input terminal, several LC bandpass filters processing signal input
Three high speed signal switching devices at end share several conductive channels and are inputted respectively with the processing signal of several LC bandpass filters
Being connected for end, has control signal in three high speed signal switching devices of the processing signal input part of several LC bandpass filters
Input terminal is connected with the control signal output of control unit, three high speeds of the processing signal output end of several LC bandpass filters
Signal switching apparatus shares several conductive channels and is connected respectively with the processing 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 processing signal output end of LC bandpass filters
The control signal output of unit is connected, three high speed signal switching devices of the processing signal output end of several LC bandpass filters
Output terminal be signal output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721341535.0U CN207559961U (en) | 2017-10-18 | 2017-10-18 | Segmented belt bandpass filter in high-frequency signal acquisition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721341535.0U CN207559961U (en) | 2017-10-18 | 2017-10-18 | Segmented belt bandpass filter in high-frequency signal acquisition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207559961U true CN207559961U (en) | 2018-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721341535.0U Active CN207559961U (en) | 2017-10-18 | 2017-10-18 | Segmented belt bandpass filter in high-frequency signal acquisition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592092A (en) * | 2017-10-18 | 2018-01-16 | 广州友智电气技术有限公司 | Segmented belt bandpass filter in high-frequency signal collection |
| CN112600533A (en) * | 2020-12-09 | 2021-04-02 | 中国科学院新疆天文台 | Filter bank for radio astronomical observation |
-
2017
- 2017-10-18 CN CN201721341535.0U patent/CN207559961U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592092A (en) * | 2017-10-18 | 2018-01-16 | 广州友智电气技术有限公司 | Segmented belt bandpass filter in high-frequency signal collection |
| CN112600533A (en) * | 2020-12-09 | 2021-04-02 | 中国科学院新疆天文台 | Filter bank for radio astronomical observation |
| CN112600533B (en) * | 2020-12-09 | 2023-10-13 | 中国科学院新疆天文台 | Filter bank for radio astronomical observation |
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