CN209731259U - A kind of frequency division full duplex underwater sound Modem - Google Patents
A kind of frequency division full duplex underwater sound Modem Download PDFInfo
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- CN209731259U CN209731259U CN201921010508.4U CN201921010508U CN209731259U CN 209731259 U CN209731259 U CN 209731259U CN 201921010508 U CN201921010508 U CN 201921010508U CN 209731259 U CN209731259 U CN 209731259U
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Abstract
The utility model discloses a kind of frequency division full duplex underwater sound Modem, including controller, digital analog converter, power amplifier, impedance matching circuit, energy converter, bandpass filter, pre-amplifier, analog-digital converter, controller, digital analog converter, power amplifier, impedance matching circuit, energy converter are sequentially connected, energy converter, bandpass filter, pre-amplifier, analog-digital converter, controller are sequentially connected, energy converter includes two different piezoelectric ceramics of working band, is respectively used to emit and receive signal；Impedance matching circuit includes variable resistance matching and resonance matching, variable resistance matching is transformer, resonance matching circuit includes three inductance L3, L2, L and two capacitors C2, C3, after energy converter is connected with main matching inductance L, with L2 and C2 branch circuit parallel connection, L3, C3 series compensation are added, integral part connects as load end with transformer secondary output both ends.
Description
Technical field
The utility model belongs to field of underwater acoustic communication, is related to a kind of frequency division full duplex underwater sound Modem.
Background technique
Underwater sound Modem is the basis of subsurface communication network, underwater sensor network.It is used to carry out data interaction as one kind
Underwater node, often arrange in pairs or groups and use with sensor, sound wave is utilized to send the collected information of sensor under water by Modem
Go back to information processing centre.Underwater sound Modem realizes that piezoelectric transducer is mainly utilized in the conversion of acoustoelectric signal, a kind of to utilize certain
The piezoelectric effect of a little monocrystal materials and the electrostriction effect of certain polycrystalline materials, which can be carried out electric energy and sound, mutually to be converted
Device.Because its electroacoustic efficiency is relatively high, power capacity is big and structure and shape can carry out respectively according to different applications
Design, is widely used in power ultrasound field.
It mostly only will be electric when energy converter is in emission state comprising a piezoelectric ceramics in existing underwater sound communication energy converter
Mechanical energy can be converted to, sound energy is reconverted into；When energy converter is in reception state, sound can be converted into mechanical energy, reconvert at
Electric energy.Under normal circumstances, the energy converter same time can only realize transmitting or reception, cannot achieve full-duplex communication.
Utility model content
The purpose of this utility model is that in view of the deficiencies of the prior art, providing a kind of frequency division full duplex underwater sound Modem, have
Body technique scheme is as follows:
A kind of frequency division full duplex underwater sound Modem, which is characterized in that the Modem includes controller, digital analog converter, power
Amplifier, impedance matching circuit, energy converter, bandpass filter, pre-amplifier, analog-digital converter, the controller, digital-to-analogue
Converter, power amplifier, impedance matching circuit, energy converter are sequentially connected, and the energy converter, bandpass filter, prime are put
Big device, analog-digital converter, controller are sequentially connected, and the energy converter includes two different piezoelectric ceramics of working band, point
Not signal for transmitting and receiving；The impedance matching circuit includes variable resistance matching and resonance matching, the variable resistance matching
For transformer, the resonance matching circuit includes three inductance L3, L2, L and two capacitors C2, C3, wherein energy converter and master
After matching inductance L series connection, and L2 and C2 branch circuit parallel connection, after adding L3, C3 series compensation, integral part as load end, with
Transformer secondary output both ends connect.
Further, the bandpass filter is eight rank bandpass filter of Butterworth.
Further, the pre-amplifier is low noise pre-amplifier.
Further, the resolution ratio of the analog-digital converter and digital analog converter is 24.
Further, 6kHz is divided between the centre frequency of two piezoelectric ceramics of the energy converter.
The beneficial effects of the utility model are as follows:
The frequency division full duplex underwater sound Modem of the utility model, by the impedance matching circuit of design, while being coupled two
The energy converter of the piezoelectric ceramics of a different operating frequency band, so that underwater sound Modem only uses an energy converter to realize underwater sound frequency division
Full-duplex communication.
Detailed description of the invention
Fig. 1 is the working principle diagram of the underwater sound Modem of the utility model；
Fig. 2 is the equivalent circuit diagram of the underwater sound moderm of the utility model；
Fig. 3 is the frequency response chart of two piezoelectric ceramics in the underwater sound moderm of the utility model.
Specific embodiment
The utility model is described in detail below according to attached drawing and preferred embodiment, the purpose of this utility model and effect will become
It must be more clearly understood that, below in conjunction with drawings and examples, the present invention will be further described in detail.It should be appreciated that herein
Described specific embodiment is only used to explain the utility model, is not used to limit the utility model.
The major function of underwater sound Modem is to realize the mutual conversion of underwater sound signal and digital signal, is realized by energy converter
Acoustic-electric conversion, while digital signal is sended and received by signal processing platform.
As shown in Figure 1, the working principle diagram of the underwater sound Modem for the utility model, which includes controller, digital-to-analogue
Converter, power amplifier, impedance matching circuit, energy converter, bandpass filter, pre-amplifier, analog-digital converter, it is described
Controller, digital analog converter, power amplifier, impedance matching circuit, energy converter are sequentially connected, the energy converter, band logical filter
Wave device, pre-amplifier, analog-digital converter, controller are sequentially connected, and the energy converter includes that two working bands are different
Piezoelectric ceramics is respectively used to emit and receive signal；
The impedance matching circuit includes variable resistance matching and resonance matching, and the variable resistance matching is transformer, described
Resonance matching circuit include three inductance L3, L2, L and two capacitors C2, C3, wherein energy converter is connected with main matching inductance L
Afterwards, with L2 and C2 branch circuit parallel connection, after adding L3, C3 series compensation, integral part is as load end, with transformer secondary output both ends
Connect, it is specific as shown in Fig. 2, being the matching for realizing power amplifier output impedance and transducer impedance, in power amplifier rear class addition transformer
To improve energy transmission efficiency.Resonance matching circuit, which is added, can improve the power factor of load circuit, reduce reactive loss, increase
Active power.Match circuit in design can be approximately second order Butterworth filter circuit, to guarantee on the one hand in wider work
Make that there is flatter output response in frequency band, on the other hand the reception frequency range of duplexing energy converter can be played significantly dry
Inhibiting effect is disturbed, while the capacitor being added can offset coil induction reactance influence caused by matching of transformer itself.
In transmitting terminal, controller is first modulated the signal to be sent, and then becomes digital signal by coding, leads to
It crosses DA and converts digital signals into analog signal, analog signal is amplified by power amplifier, pass through impedance matching electricity
After emission effciency is improved on road, the transmitting module of energy converter is driven, the analog signal that will emit is converted into transmitting in being suitble to water
Acoustical signal.In receiving end, the acoustical signal received is converted into analog electrical signal by the receiving module of energy converter, and analog signal is first
Bandpass filter is first passed through, then it is amplified to range that suitable AD is acquired by analog electrical signal with pre-amplifier, passes through AD
Analog electrical signal is converted into digital electric signal afterwards, then digital signal is decoded in the controller, demodulates work.
Preferably, the bandpass filter is eight rank bandpass filter of Butterworth, which has with interior flat
Characteristic.The pre-amplifier is low noise pre-amplifier, which has extremely low equivalent inpnt short circuit noise；Institute
The resolution ratio of the analog-digital converter and digital analog converter stated is 24.
In order to reduce transmitting signal and receive influencing each other for signal, the center of two piezoelectric ceramics of the energy converter
Frequency interval is 6kHz.
As shown in figure 3, the working band of two piezoelectric ceramics for the underwater sound Modem of the utility model, centre frequency point
Not Wei 17kHz and 23kHz, bandwidth is 4kHz.When carrying out duplex communication, piezoelectric ceramics A is responsible for electric signal to be sent
It is converted into the acoustical signal that frequency is 17kHz or so, while piezoelectric ceramics B can receive the sound that frequency in channel is 23kHz or so
Signal is simultaneously converted into electric signal, due to emitting and receiving in two different frequency bands, emits signal in the frequency for receiving piezoelectric ceramics
It can be inhibited with interior, so influence of the transmitting signal to receiving end is smaller.
It will appreciated by the skilled person that the foregoing is merely the preferred embodiments of utility model, and do not have to
In limitation utility model, although utility model is described in detail referring to previous examples, for those skilled in the art
Member for, can still modify to the technical solution of aforementioned each case history, or to part of technical characteristic into
Row equivalent replacement.With within principle, modification, equivalent replacement for being made etc. should be included in practical new all spirit in utility model
Within the protection scope of type.
Claims (5)
1. a kind of frequency division full duplex underwater sound Modem, which is characterized in that the Modem includes that controller, digital analog converter, power are put
Big device, impedance matching circuit, energy converter, bandpass filter, pre-amplifier, analog-digital converter, the controller, digital-to-analogue turn
Parallel operation, power amplifier, impedance matching circuit, energy converter are sequentially connected, the energy converter, bandpass filter, prime amplification
Device, analog-digital converter, controller are sequentially connected, and the energy converter includes two different piezoelectric ceramics of working band, respectively
Signal for transmitting and receiving；The impedance matching circuit includes variable resistance matching and resonance matching, and the variable resistance matching is
Transformer, the resonance matching circuit include three inductance L3, L2, L and two capacitors C2, C3, wherein energy converter and main
After inductance L series connection, with L2 and C2 branch circuit parallel connection, after adding L3, C3 series compensation, integral part is as load end, with change
Depressor secondary both ends connect.
2. frequency division full duplex underwater sound Modem according to claim 1, which is characterized in that the bandpass filter is bar
Special eight rank bandpass filter of Butterworth.
3. frequency division full duplex underwater sound Modem according to claim 1, which is characterized in that the pre-amplifier is low
It makes an uproar pre-amplifier.
4. frequency division full duplex underwater sound Modem according to claim 1, which is characterized in that the analog-digital converter sum number
The resolution ratio of mode converter is 24.
5. frequency division full duplex underwater sound Modem according to claim 1, which is characterized in that two pressures of the energy converter
6kHz is divided between the centre frequency of electroceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921010508.4U CN209731259U (en) | 2019-07-01 | 2019-07-01 | A kind of frequency division full duplex underwater sound Modem |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921010508.4U CN209731259U (en) | 2019-07-01 | 2019-07-01 | A kind of frequency division full duplex underwater sound Modem |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233679A (en) * | 2019-07-01 | 2019-09-13 | 舟山美通信息技术有限责任公司 | A kind of frequency division full duplex underwater sound Modem |
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2019
- 2019-07-01 CN CN201921010508.4U patent/CN209731259U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233679A (en) * | 2019-07-01 | 2019-09-13 | 舟山美通信息技术有限责任公司 | A kind of frequency division full duplex underwater sound Modem |
| CN110233679B (en) * | 2019-07-01 | 2023-12-12 | 舟山美通信息技术有限责任公司 | Frequency division full duplex underwater sound Modem |
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