CN207263918U - Underwater acoustic system signal pre-processing circuit - Google Patents
Underwater acoustic system signal pre-processing circuit Download PDFInfo
- Publication number
- CN207263918U CN207263918U CN201720921499.9U CN201720921499U CN207263918U CN 207263918 U CN207263918 U CN 207263918U CN 201720921499 U CN201720921499 U CN 201720921499U CN 207263918 U CN207263918 U CN 207263918U
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- output terminal
- input terminal
- signal
- variable gain
- bandpass filter
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Abstract
The utility model discloses a kind of underwater acoustic system signal pre-processing circuit.Underwater acoustic system signal pre-processing circuit, including preceding electric discharge road (1), variable gain amplifier (2), bandpass filter (3), buffer amplifier (4), the input terminal of electric discharge road (1) is used to receive array element output analog signal before described, the input terminal of output terminal connection variable gain amplifier (2), the input terminal of the output terminal connection bandpass filter (3) of the variable gain amplifier (2), the input terminal of the output terminal connection buffer amplifier (4) of the bandpass filter (3), the output terminal of the buffer amplifier (4) is used to be connected to sample quantization circuit.During Signal Pretreatment, buffering, amplification, decay, isolation and the linearisation sensor signal that signal is completed by preceding electric discharge road, variable gain amplifier, bandpass filter, buffer amplifier, optical coupling isolator operate, and realize the Signal Pretreatment of high quality.
Description
Technical field
The utility model belongs to the technical field of underwater acoustic system circuit, and in particular to a kind of underwater acoustic system Signal Pretreatment electricity
Road.
Background technology
In underwater sound field, Digital Signal Processing has become essential important means, and be developing progressively for
One special subject --- Underwater acoustic signal processing, in Underwater acoustic signal processing, signal acquisition also has vital effect,
The characteristics of underwater sound signal data collecting system forms its own.In general, sonar uses polynary battle array, basic matrix output signal
Way it is more, this requires use multichannel collecting system.The frequency of general underwater sound signal is relatively low, but the more acquisition times of passage
Long, this requires the data storage of larger capacity.The signal of hydrophone output is very faint, will be to letter before collection quantifies
Number work is performed some processing, such as amplify, filter.In acquisition system, input analog signal is usually first passed through into pretreatment
Circuit (Signal Conditioning Circuit) and then sampled and quantified again.The purpose of Signal Pretreatment is to complete
The operations such as buffering, amplification, decay, isolation and linearisation sensor signal.Believe during amplification, filtering in Signal Pretreatment
The influence of electrical noise, digital circuit number is highly susceptible to, signal phase is changed.In order to ensure each channel amplitude and phase
Uniformity, very high requirement is proposed to the signal pre-processing circuit of analog receiver.
Above-mentioned discussion content purpose is may be with each side of the utility model being described below to reader's introduction
The relevant technology contents in face, it is believed that the discussion content contributes to as reader with background's information, to be conducive to more fully understand this
The various aspects of utility model, it is therefore to be understood that being to read these discussions with this angle, without being to recognize that the prior art.
Utility model content
The purpose of this utility model is that avoid deficiency of the prior art and a kind of underwater acoustic system Signal Pretreatment is provided
Circuit, it in high quality can pre-process signal.
The purpose of this utility model is achieved through the following technical solutions：
A kind of underwater acoustic system signal pre-processing circuit, including preceding electric discharge road, variable gain amplifier, bandpass filtering are provided
Device, buffer amplifier, the input terminal on road of discharging before described are used to receive array element output analog signal, output terminal connection variable gain
The input terminal of amplifier, the input terminal of the output terminal connection bandpass filter of the variable gain amplifier, the bandpass filtering
The input terminal of the output terminal connection buffer amplifier of device, the output terminal of the buffer amplifier are used to be connected to sample quantization electricity
Road.
As a further improvement, it is provided with linear light between the output terminal of the buffer amplifier and sample quantization circuit
Coupling isolator.
As a further improvement, the bandpass filter is made of a low-pass filter and a high-pass filter.
Underwater acoustic system signal pre-processing circuit provided by the utility model, including preceding electric discharge road, variable gain amplifier, band
Bandpass filter, buffer amplifier, the input terminal on road of discharging before described are used to receive array element output analog signal, and output terminal connection can
The input terminal of variable-gain amplifier, the input terminal of the output terminal connection bandpass filter of the variable gain amplifier, the band
The input terminal of the output terminal connection buffer amplifier of bandpass filter, the output terminal of the buffer amplifier are used to be connected to sampling quantity
Change circuit.Linear optical coupling isolation device is provided between the output terminal and sample quantization circuit of the buffer amplifier.It is pre- in signal
In processing procedure, letter is completed by preceding electric discharge road, variable gain amplifier, bandpass filter, buffer amplifier, optical coupling isolator
Number buffering, amplification, decay, isolation and linearisation sensor signal operation, realize the Signal Pretreatment of high quality.
Brief description of the drawings
Using attached drawing, the utility model is described in further detail, but the embodiment in attached drawing is not formed to the utility model
Any restrictions, without creative efforts, can also be according to following attached for those of ordinary skill in the art
Figure obtains other attached drawings.
Fig. 1 is the system block diagram of underwater acoustic system signal pre-processing circuit.
Fig. 2 is the circuit block diagram of bandpass filter.
Fig. 3 is the circuit diagram of variable gain amplifier.
Fig. 4 is the circuit diagram of linear optical coupling isolation device.
Embodiment
In order to make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and have
The utility model is described in further detail body embodiment, it is necessary to explanation is, in the case where there is no conflict, the application's
Feature in embodiment and embodiment can be mutually combined.
As depicted in figs. 1 and 2, underwater acoustic system signal pre-processing circuit described in the utility model, including preceding electric discharge road 1,
Variable gain amplifier 2, bandpass filter 3, buffer amplifier 4, the input terminal on road 1 of discharging before described are used to receive array element output
Analog signal, output terminal connect the input terminal of variable gain amplifier 2, the output terminal connect band of the variable gain amplifier 2
The input terminal of bandpass filter 3, the input terminal of the output terminal connection buffer amplifier 4 of the bandpass filter 3, the Hyblid Buffer Amplifier
The output terminal of device 4 is used to be connected to sample quantization circuit.
As shown in Fig. 2, the bandpass filter 3 is by a low-pass filter (LowPASS) and a high-pass filter
(HighPASS) form, 3 passband frequency range 0Hz~25kHz of bandpass filter, wherein, low-pass filter is arbitrarily adjustable
(500Hz~25kHz), maximum cut-off 25kHz, it is minimum be transferred to 500Hz low-pass filters by digital regulation resistance (50 Ω~
100k Ω) adjustment, digital regulation resistance selection AD8400AR100；High-pass filter is divided into 4 grades (0Hz, 50Hz, 1kHz, 10kHz),
High-pass filter configures resistance and adjusts cutoff frequency by Jumper forms, and maximum cut-off 10kHz is minimum to be adjustable to 0Hz.
The circuit diagram of variable gain amplifier 2 as shown in Figure 3, it adjusts the work-based logic and wave filter of amplification quantity
Configure similar, every 4 passages individually control, by one group of CS, CLK, SDI Serial Control line traffic control.Amplify by adjusting the first order
The amplification quantity of device controls the gain of whole receiver, and wherein digital regulation resistance also selects AD8400AR100.
As further preferred embodiment, set between the output terminal and sample quantization circuit of the buffer amplifier 4
It is equipped with linear optical coupling isolation device 5.In order to improve receiver antijamming capability, analog signal is avoided to be interfered with each other with digital signal,
Photoelectric isolated chip is selected to isolate analog portion with numerical portion.Analog signal is filtered, after amplification, is sent by linear optical coupling
Give A/D devices.As shown in figure 4, linear optical coupling isolation device is mainly by a Light-emitting diode LED and two photodiode groups
Shine into, input signal excitation LED, input photosensitive diode monitor and stablize the light source of LED, eliminate non-linear in LED and
Drift, output photodiode sensing produces light-dependent current, so as to carry out effective isolation outputting and inputting.Linear optical coupling
Using the IL388 of SIEMENS companies[30], its signal distortion is less than -80dB and meets the requirement of system.
Many details are elaborated in above description in order to fully understand the utility model, still, this practicality is new
Type can also be implemented using other different from other modes described here, it is thus impossible to be interpreted as protecting the utility model
Protect the limitation of scope.
In short, although the utility model lists above-mentioned preferred embodiment, although it should be noted that the skill of this area
Art personnel can carry out various change and remodeling, unless such change and remodeling deviate from the scope of the utility model, otherwise
It should be construed as being included in the scope of protection of the utility model.
Claims (3)
- A kind of 1. underwater acoustic system signal pre-processing circuit, it is characterised in that：Including preceding electric discharge road (1), variable gain amplifier (2), bandpass filter (3), buffer amplifier (4), the input terminal of preceding electric discharge road (1) are used to receive array element output and simulate to believe Number, the input terminal of output terminal connection variable gain amplifier (2), the output terminal connection band logical of the variable gain amplifier (2) The input terminal of wave filter (3), the input terminal of the output terminal connection buffer amplifier (4) of the bandpass filter (3), the buffering The output terminal of amplifier (4) is used to be connected to sample quantization circuit.
- 2. underwater acoustic system signal pre-processing circuit according to claim 1, it is characterised in that：The buffer amplifier (4) Output terminal and sample quantization circuit between be provided with linear optical coupling isolation device (5).
- 3. underwater acoustic system signal pre-processing circuit according to claim 1 or 2, it is characterised in that：The bandpass filter (3) it is made of a low-pass filter and a high-pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720921499.9U CN207263918U (en) | 2017-07-27 | 2017-07-27 | Underwater acoustic system signal pre-processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720921499.9U CN207263918U (en) | 2017-07-27 | 2017-07-27 | Underwater acoustic system signal pre-processing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207263918U true CN207263918U (en) | 2018-04-20 |
Family
ID=61927194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720921499.9U Expired - Fee Related CN207263918U (en) | 2017-07-27 | 2017-07-27 | Underwater acoustic system signal pre-processing circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN207263918U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109828240A (en) * | 2019-03-21 | 2019-05-31 | 中国电子科技集团公司第三十八研究所 | A kind of analog baseband circuitry and 77GHz car radar |
-
2017
- 2017-07-27 CN CN201720921499.9U patent/CN207263918U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109828240A (en) * | 2019-03-21 | 2019-05-31 | 中国电子科技集团公司第三十八研究所 | A kind of analog baseband circuitry and 77GHz car radar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Luo Kun Inventor after: Zhao Hang Inventor after: Liu Baifeng Inventor after: Zhu Yuanlin Inventor after: Shang Chao Inventor after: Li Bin Inventor after: Xu Guogui Inventor before: Luo Kun Inventor before: Zhao Hang Inventor before: Liu Baifeng Inventor before: Zhu Yuanlin Inventor before: Shang Chao Inventor before: Li Bin Inventor before: Xu Guogui |
|
| CB03 | Change of inventor or designer information | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 Termination date: 20180727 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |