CN102201872A - Low-power-consumption underwater acoustic communication arousing equipment - Google Patents
Low-power-consumption underwater acoustic communication arousing equipment Download PDFInfo
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Abstract
The invention provides low-power-consumption underwater acoustic communication arousing equipment which comprises a low-power-consumption signal adjusting circuit and a low-power-consumption arousing circuit, wherein the low-power-consumption signal adjusting circuit comprises an amplifier and a filter and the low-power-consumption arousing circuit comprises a low-power-consumption 51 single chip microcomputer and a peripheric circuit thereof; the filter of the low-power-consumption signal adjusting circuit is connected with a part of universal I/O (Input/output) ports of the low-power-consumption 51 single chip microcomputer; and the rest universal I/O ports of the low-power-consumption 51 single chip microcomputer are connected with a main circuit of the underwater acoustic communication equipment for controlling the working mode of the underwater acoustic communication equipment. In the invention, with respect to the characteristic of underwater acoustic communication, the utilization rate of a power supply of the underwater acoustic communication equipment is increased through an arousing mechanism, and the service life of a whole underwater acoustic communication equipment network is effectively prolonged. Compared with a traditional arousing circuit for directly distinguishing energy, the invention has the advantage of largely reducing misjudgement caused by environmental disturbance and has higher reliability; and meanwhile, parameters of the circuit are easy to modify, and the invention has a good energy saving effect.
Description
Technical field
The present invention relates to a kind of low-power consumption wake-up device that is used for real-time water sound communication.
Background technology
Underwater sound communication is mainly used in military field at first, last decade, along with the mankind's continually developing and utilizing to marine resources, directly obtain science data of seabed work station record or the like as the remote control of the pollution monitoring of environment in recent years system, offshore oil industry and non-collection apparatus equipment, make that the commercial prospect of the underwater information communication technology is more and more wide, correspondingly, also promoted the development of subsurface communication technology.
In underwater sound communication, because the mal-condition of marine environment, the survival ability under water of subsurface communication equipment is a very crucial problem always, and it directly affects the performance and the useful life of whole subsurface communication device network.Because subsurface communication equipment comes the of a high price of makeup energy by the mode of changing battery, so, under the situation that is difficult to increase in the power supply total amount, can prolong the life-span of whole subsurface communication device network effectively by raising power utilization rate.Arouse machine processed is the main path that solves the power utilization rate.At present, commonplace employing method has timing wake-up mechanism, passive awakening technology, wireless trigger awakening technology or the like, but these technology are based on all that the land wireless network researches and develops, and is not suitable for being applied in the underwater sound communication.
Summary of the invention
The object of the present invention is to provide a kind of low-power consumption wake-up device that is used for real-time water sound communication, thereby prolong the life-span of whole subsurface communication device network by raising power utilization rate effectively.
The object of the present invention is achieved like this:
It comprises power down signal adjustment circuit part of being made up of amplifier and filter and the low-power consumption wake-up circuit part of being made up of low-power consumption 51 single-chip microcomputers and peripheral circuit thereof.The filter that power down signal is adjusted circuit links to each other with the part universaling I/O port of low-power consumption 51 single-chip microcomputers, and the universaling I/O port of remaining low-power consumption 51 single-chip microcomputers links to each other with the main body circuit of subsurface communication equipment, the mode of operation of control subsurface communication equipment.
In the technique scheme, described power down signal is adjusted circuit part and is realized by analog circuit, can directly be welded on low-power consumption 51 single-chip microcomputers, and wherein amplifier is mainly used in the signal power amplification, and filter mainly carries out filtering and noise reduction sound to signal.
In the technique scheme, described wake-up signal is single frequency sinusoidal signal or single-frequency cosine signal.
In the technique scheme, the wake-up signal of described low-power consumption 51 single-chip microcomputers after to amplification filtering sampled, and sampled signal is carried out single-frequency point fixed point DFT handle, whether corresponding by adjudicating its frequency values with known wake-up signal frequency reference value, thus judge that whether this information is for waking information up.If this information is not the correct information of waking up, then do not carry out any processing; If this information is the correct information of waking up, then wake-up circuit sends power control signal to subsurface communication machine main body circuit, wake communication equipment main body circuit up and carry out work, simultaneously power down signal is adjusted circuit and send the power supply termination signal, stop it and receive detection information.
The invention has the advantages that:
1. The present invention be directed to the specially designed a kind of low-power consumption wake-up device of underwater sound communication.
2. the present invention adopts integrated low-power consumption 51 chip microcontroller low-power consumption arousal functions.Equipment such as the DSP that adopts with tradition and FPGA are compared, and 51 single-chip microcomputer prices of technology maturation are low, strong to environmental condition adaptability, function is strong, volume is little, low in energy consumption, good reliability.And adopt single-chip microcomputer can make things convenient for, finish reliably every function of Digital Signal Processing in the underwater sound communication, and be easy to realize function expansion.
3. the present invention adopts low-power consumption 51 single-chip microcomputers to carry out the method that frequency is differentiated to received signal, and promptly single-frequency point fixed point DFT handles.Compare with the wake-up circuit of directly differentiating energy in the past, the present invention can reduce the erroneous judgement that causes because of environmental interference greatly, improves system reliability.Handle owing to adopted integrated low-power consumption 51 singlechip chips that signal is carried out single-frequency point DFT, both can significantly reduce peripheral Design of Simulating Circuits, can improve signal resolution effectively again, and the circuit parameter of design is revised easily.
4. based on low power dissipation design thought, the single-chip microcomputer signal processing time is short more good more, so in the present invention, low-power consumption 51 single-chip microcomputers adopt the C Language And Assembly Language to finish single-frequency point fixed point DFT algorithm jointly.
5. the low-power consumption wake-up device of real-time water sound communication provided by the invention can prolong the life-span of whole subsurface communication device network effectively, and very big application prospect and value are arranged in the long distance wireless subsurface communication.
Description of drawings
Fig. 1 is a kind of module diagram that is used for the low-power consumption wake-up device of real-time water sound communication of the present invention;
Fig. 2 is the structural representation of low-power consumption wake-up circuit part of the present invention;
Fig. 3 is the graph of a relation between single-chip microcomputer operating current and clock frequency among the embodiment;
Fig. 4 be among the embodiment whole underwater communications system time-current relationship figure.
Embodiment
Present embodiment is at the wake-up device that is fixed on apart from the bank about 10 kilometers subsurface communication machine design of main circuit.
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1, the present invention includes power down signal adjustment circuit part of forming by amplifier and filter and the low-power consumption wake-up circuit part of forming by low-power consumption 51 single-chip microcomputers and peripheral circuit thereof.The filter that power down signal is adjusted circuit links to each other with the part universaling I/O port of low-power consumption 51 single-chip microcomputers, and the universaling I/O port of remaining low-power consumption 51 single-chip microcomputers links to each other with the main body circuit of subsurface communication equipment, the mode of operation of control subsurface communication equipment.
The concrete workflow of low-power consumption wake-up device is: when long-range send wake-up signal after, power down signal is adjusted circuit module and is monitored the submarine signal variation, signal is collected, and adjusted accordingly, promptly amplify and filtering, send the signal of adjusting to the low-power consumption wake-up circuit subsequently.Whether the information that receives is carried out signals collecting to the low-power consumption wake-up circuit and single-frequency point fixed point DFT handles, corresponding with known wake-up signal frequency reference value by adjudicating its frequency values, thereby judge that whether this information is for waking information up.If this information is not the correct information of waking up, then do not carry out any processing; If this information is the correct information of waking up, then wake-up circuit sends power control signal to subsurface communication machine main body circuit, wake communication equipment main body circuit up and carry out work, simultaneously power down signal is adjusted circuit and send the power supply termination signal, stop it and receive detection information.Can send the termination working signal after communication equipment main body circuit working finishes to the low power wake-up circuit, inform that wake-up circuit communication equipment main body finished relevant work.Thereupon, wake-up circuit can send the termination power supply signal to communication equipment main body circuit, and it is in the Sleep pattern of extremely low power dissipation, waits for and waking up next time; And send wake-up signal to the power down signal modulate circuit simultaneously, and wake its work up, make it recover the state that monitoring receives the external change signal.Whole underwater communications system is with the said method periodic duty.
Because present embodiment is at the wake-up circuit that is fixed on apart from the bank about 10 kilometers subsurface communication machine design of main circuit, so the wake-up signal to transmission has corresponding requirements, be that transmission range is about 10 kilometers, corresponding single-frequency wake-up signal frequency is about 8KHz.
In conjunction with Fig. 2, low-power consumption 51 single-chip microcomputers adopt 8 single-chip microcomputer C8051F020 of a kind of mixed signal SOC type that texas,U.S Cygnal company releases in the present embodiment, it has clock hardware flexibly, system can be changed between effective operation pattern and low-power consumption mode easily, the powder source management mode of intelligence can freely switch in operate as normal and holding state, thereby reduce the energy loss of whole system, when operating frequency is lower than 10kHz, loss of clock detector (MCD) can reset in the initiating system generation, guarantees the safe and reliable of system works.
The supply power mode of low-power consumption 51 single-chip microcomputers adopts and directly uses lithium battery power supply 2.7V in the present embodiment.That this design can reach is energy-conservation, simplify the effect of circuit, thereby further reduces the extra power consumption expense, reaches lowest power consumption.
The C8051F020 single-chip microcomputer adopts low level to reset in the present embodiment.
Low-power consumption 51 single-chip microcomputers adopt single-frequency point fixed point DFT algorithm in the present embodiment, and have made respective design at application requirements.
1. the advantage of single-frequency point fixed point DFT algorithm
Because under ambient sea noise disturbed, the time domain specification of wake-up signal was had a strong impact on, and, because signal decay in the air inevitably can be flooded by noise, differentiate thereby can't carry out time domain.So, after acquired signal, to carry out frequency domain and handle, be i.e. Fourier transform signal.
Signal is being carried out in the spectrum analysis, and comparatively general have two kinds of method discrete Fourier transform (DFT) (DFT) and a fast Fourier transform (FFT).Though the required operand of FFT is more much smaller than DFT, and hardware takies fewer logical resource when realizing, because single-chip microcomputer only carries out the frequency domain processing to single-point among the present invention, so fft algorithm there is no clear superiority.And, the DFT computing can with multiply each other immediately after the once sampling, the method for accumulating operation, promptly can adopt one and count a bit, so the real-time of DFT is better than FFT, so the present invention adopts the DFT algorithm.
In the DFT algorithm, be divided into fixed point DFT algorithm and floating-point DFT algorithm.The characteristics of floating-point operation are that precision is higher, wide dynamic range, but because amount of calculation is bigger, need long computing time; If when adopting hardware to realize Floating-point Computation, hardware circuit is complicated, and cost is higher relatively.Among the present invention, lower because single-chip microcomputer only need be realized single-point DFT computing discrimination function to the required precision of calculating, so adopt more quick simple fixed point DFT algorithm.
2. single-frequency point fixed point DFT algorithm is realized
1) sample rate, DFT counts, the relation that should satisfy between signal frequency:
The determining of sample rate is decided by the peak frequency of wake-up signal and the time that single-chip microcomputer calculates single-point DFT.
Required time is t if single-chip microcomputer N point data is calculated single-frequency point DFT
x, the highest frequency of signal f (t) is f
m, sampling frequency is f
s, by the Nyquist sampling theorem as can be known, f
s〉=2f
m, from the time consideration,
In order to guarantee real-time, the single-chip microcomputer sampling should be carried out jointly with the DFT computing, requires sample rate to satisfy
Because simple signal frequency (8KHz) energy on frequency spectrum should be concentrated, so require to satisfy between sample rate f s and signal frequency f:
Wherein m is a positive integer, promptly signal frequency be DFT resolution positive integer doubly.
According to above designing requirement, selected sample rate is 20480Hz in the present embodiment, DFT number of sampling N=256, and resolution is f
s/ N=20480Hz/256=80Hz.
2) fixed point DFT theory of algorithm foundation:
If single-chip microcomputer sampling gained signal be x (n) (n=0,1, ```, N-1), its discrete Fourier transform (DFT) is defined as:
If x (n)=a (n)+jb (n), X (K)=A (k)+jB (k), Q=2 π/N, then following formula becomes:
That is:
According to above-mentioned formula, can obtain real part and imaginary part behind the sampled signal Fourier transform respectively, according to its spectrum energy value X
2=A
2+ B
2Signal frequency is adjudicated.
3) scm software is realized fixed point DFT algorithm:
Directly adopt the method for C language compilation simple, clear thinking still, can find that its implementation is diverse and complicated when operation in KEIL C, need individual 106*256 instruction just can finish the DFT computing of a point, time spent 0.0129s altogether.For actual wake-up circuit,, require single-chip microcomputer operation time short as far as possible because that we expect is least in power-consuming, so, after observing its assembly statement repeatedly, it can be rewritten into C Language And Assembly Language nesting method and realize the DFT computing, thereby shorten program runtime.
In the present embodiment, the power consumption when whole low-power consumption wake-up device is worked will mainly concentrate on the energy consumption of C8015F020 single-chip microcomputer.The C8051F020 chip power-consumption mainly is made up of digital device power consumption and analog peripherals equipment power dissipation.
The energy consumption of the digital device of single-chip microcomputer mainly is to be weighed by the size of CPU electric current, and the CPU size of current is relevant with the single-chip microcomputer clock frequency.If the speed of single-chip microcomputer is enough high, can in sampling process, finish processing procedure in real time, then can suitably reduce the single-chip microcomputer clock frequency, make that fixed point DFT work of treatment was just in time also finished when sampling was finished, thereby make the total power consumption minimum, and sense cycle minimum.As shown in Figure 3, when the single-chip microcomputer clock frequency was 3MHz, CPU can reach the lowest power consumption state.The analog peripherals equipment power dissipation of single-chip microcomputer be ADC, temperature sensor, internal bias voltage generator and internal oscillator power consumption and, this power consumption is determined by singlechip.
Reduce the average power consumption of whole underwater communications system, need consider from two aspects:
First be suitably be adjusted at influence if having time the parameter of system works always, usually operating voltage is the parameter of important consideration, operating voltage has determined whether system can be in the normal operation state, it can be provided by voltage adjuster or a battery, for an energy conserving system, operating voltage should be minimized, with conserve energy.
Second is exactly to make up rational structure to reduce power consumption, be two mode of operations of system design: one is operating mode efficiently; Another then is to be the sleep pattern of purpose to reduce power consumption, the design standard difference of two patterns, but should allow system in the most of the time, be in sleep pattern as far as possible, to reduce the total power consumption of system.
Be low power dissipation design and the concrete power consumption calculation that specifically illustrates C8051F020 below.
Consider low-power consumption from reducing the operating voltage angle, following parameter is C8051F020 value corresponding when the 2.7V operating voltage.
According to the operating characteristic of subsurface communication machine main body circuit, to set and be waken up work (for example from 10:00-11:00 in the morning, afternoon 16:00-17:00) at special time its every day, the operating time is 2 hours/day, all the other times are in power down state.When the main body circuit is in running order (establish its operating current greatly about about 50mA, operating voltage is 5V), power down signal is adjusted circuit and is in power down state, and operating current is 0.Previous hour of main body circuit working time, the low-power consumption wake-up circuit wakes the power down signal of power-off up and adjusts circuit, making it, in running order (establishing operating current is 20mA, operating voltage is 3V), at any time detect wake-up signal, so it also is 2 hours/day (from 9:00-10:00 in the morning, afternoon 15:00-16:00) that power down signal is adjusted the circuit working time, the remaining time all is in power down state.
For the low-power consumption wake-up circuit, it is 3MHz that the setting single-chip microcomputer is in the internal system clock frequency always, and operating current is the operating state of the lowest power consumption of 1.5mA, as shown in Figure 4.
The power consumption that can calculate whole underwater communications system every day according to above information is:
W '=5V*50mA*2h+3V*20mA*2h+2.7V*1.5mA*24h=2582J, wherein the low-power consumption wake-up circuit only consumes every day: Wa '=2.7V*1.5mA*24h=350J.The disposable lithium cell of 1 10000mAH can be supported low-power consumption wake-up circuit operation 1 year.
If all circuit of system all are in long time continuous working, single-chip microcomputer exemplary operation electric current is 10mA@20MHz, then need power consumption to be: W=5V*50mA*24h+3V*20mA*24h+2.7V*10mA*24h=29116.8J, wherein the low-power consumption wake-up circuit consumes every day: Wa=2.7V*10mA*24h=2332.8J.This shows that can save (2332.8-350)/2332.8=85.0% power consumption through the low-power consumption wake-up circuit that appropriate design is arranged work, whole system can be saved (29116.8-2582)/29116.8=91.1% power consumption.
Claims (8)
1. low-power consumption wake-up device that is used for underwater sound communication comprises: the low-power consumption wake-up circuit part that the power down signal of being made up of amplifier and filter is adjusted circuit part and is made up of low-power consumption 51 single-chip microcomputers and peripheral circuit thereof.It is characterized in that, the filter that described power down signal is adjusted circuit links to each other with the part universaling I/O port of low-power consumption 51 single-chip microcomputers, the universaling I/O port of remaining low-power consumption 51 single-chip microcomputers links to each other with the main body circuit of subsurface communication equipment, the mode of operation of control subsurface communication equipment.
2. by the described low-power consumption wake-up device of claim 1, it is characterized in that described low-power consumption wake-up device is specially designed at underwater sound communication.
3. by the described low-power consumption wake-up device of claim 1, it is characterized in that, described power down signal is adjusted circuit part and is realized by analog circuit, can directly be welded on low-power consumption 51 single-chip microcomputers, wherein amplifier is mainly used in the signal power amplification, and filter mainly carries out filtering and noise reduction sound to signal.
4. by the described low-power consumption wake-up device of claim 1, it is characterized in that the wake-up signal that described low-power consumption wake-up device receives is single frequency sinusoidal signal or single-frequency cosine signal.
5. by the described low-power consumption wake-up device of claim 1, it is characterized in that, the wake-up signal of described low-power consumption 51 single-chip microcomputers after to amplification filtering sampled, and sampled signal is carried out single-frequency point fixed point DFT handle, whether corresponding by adjudicating its frequency values with known wake-up signal frequency reference value, thus judge that whether this information is for waking information up.If this information is not the correct information of waking up, then do not carry out any processing; If this information is the correct information of waking up, then wake-up circuit sends power control signal to subsurface communication machine main body circuit, wake communication equipment main body circuit up and carry out work, simultaneously power down signal is adjusted circuit and send the power supply termination signal, stop it and receive detection information.
6. by the described low-power consumption wake-up device of claim 5, it is characterized in that, adopt integrated low-power consumption 51 chip microcontroller low-power consumption arousal functions.
7. by the described low-power consumption wake-up device of claim 5, it is characterized in that low-power consumption 51 single-chip microcomputers carry out the method that frequency is differentiated to received signal.
8. by the described low-power consumption wake-up device of claim 5, it is characterized in that low-power consumption 51 single-chip microcomputers adopt the C Language And Assembly Language to finish single-frequency point fixed point DFT algorithm jointly.
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| CN103150885A (en) * | 2013-01-30 | 2013-06-12 | 中国船舶重工集团公司第七一〇研究所 | Underwater sound remote control method and value-change decoding circuit |
| CN105043436A (en) * | 2015-05-08 | 2015-11-11 | 大连理工大学 | Self-adaptive deep sea self-contained monitoring device and operating method thereof |
| CN106980597A (en) * | 2017-03-31 | 2017-07-25 | 合肥松豪电子科技有限公司 | Verification of System-On-a-Chip method and checking system |
| CN110474694A (en) * | 2019-07-17 | 2019-11-19 | 西北工业大学 | A kind of underwater sound wake-up circuit |
| CN110581770A (en) * | 2019-09-17 | 2019-12-17 | 深圳市智慧海洋科技有限公司 | communication device and communication device wake-up method |
| EP3641164A1 (en) * | 2013-03-15 | 2020-04-22 | Magseis FF LLC | High-bandwidth underwater data communication system |
| CN111190365A (en) * | 2019-12-31 | 2020-05-22 | 中国海洋石油集团有限公司 | Two-stage wake-up circuit for underwater acoustic communication and wake-up method thereof |
| US10778342B2 (en) | 2013-03-15 | 2020-09-15 | Magseis Ff Llc | High-bandwidth underwater data communication system |
| CN114609956A (en) * | 2022-05-12 | 2022-06-10 | 山东北溟科技有限公司 | Sound beacon activation method and system based on multi-level interruption |
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| CN103150885B (en) * | 2013-01-30 | 2016-08-03 | 中国船舶重工集团公司第七一〇研究所 | A kind of underwater images method and be worth more decoding circuit |
| CN103150885A (en) * | 2013-01-30 | 2013-06-12 | 中国船舶重工集团公司第七一〇研究所 | Underwater sound remote control method and value-change decoding circuit |
| EP3641164A1 (en) * | 2013-03-15 | 2020-04-22 | Magseis FF LLC | High-bandwidth underwater data communication system |
| US11128386B2 (en) | 2013-03-15 | 2021-09-21 | Fairfield Industries Incorporated | High-bandwidth underwater data communication system |
| US11057117B2 (en) | 2013-03-15 | 2021-07-06 | Magseis Ff Llc | High-bandwidth underwater data communication system |
| US10778342B2 (en) | 2013-03-15 | 2020-09-15 | Magseis Ff Llc | High-bandwidth underwater data communication system |
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| CN106980597B (en) * | 2017-03-31 | 2021-06-01 | 合肥松豪电子科技有限公司 | System-on-chip verification method and system |
| CN106980597A (en) * | 2017-03-31 | 2017-07-25 | 合肥松豪电子科技有限公司 | Verification of System-On-a-Chip method and checking system |
| CN110474694A (en) * | 2019-07-17 | 2019-11-19 | 西北工业大学 | A kind of underwater sound wake-up circuit |
| CN110581770A (en) * | 2019-09-17 | 2019-12-17 | 深圳市智慧海洋科技有限公司 | communication device and communication device wake-up method |
| CN111190365A (en) * | 2019-12-31 | 2020-05-22 | 中国海洋石油集团有限公司 | Two-stage wake-up circuit for underwater acoustic communication and wake-up method thereof |
| CN111190365B (en) * | 2019-12-31 | 2021-04-06 | 中国海洋石油集团有限公司 | Two-stage wake-up circuit for underwater acoustic communication and wake-up method thereof |
| CN114609956A (en) * | 2022-05-12 | 2022-06-10 | 山东北溟科技有限公司 | Sound beacon activation method and system based on multi-level interruption |
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Application publication date: 20110928 |