CN213817793U - Wake-up circuit and underwater acoustic communication machine - Google Patents

Abstract

The application relates to a wake-up circuit and underwater acoustic communicator, this wake-up circuit includes: the receiving processing module is used for receiving the underwater sound signals in real time and preprocessing the underwater sound signals to obtain electric signals; the at least one detection channel is used for identifying and detecting the electric signals and outputting corresponding detection result signals according to the identification and detection results; the judging module is used for judging the time sequence relation of output pulses corresponding to all the detection channels and generating a wake-up signal when the time sequence relation meets a preset wake-up time sequence relation; the awakening module is connected with the underwater sound communication circuit of the underwater sound communication machine and used for awakening the underwater sound communication machine according to the awakening signal. The frequency of the underwater sound awakening signal can be different aiming at different underwater environments, the electric signal capable of being identified and detected by the detection channel can be adjusted according to the actual underwater environment, the requirements of variability of the underwater environment and different communication frequency bands can be met, the awakening reliability is improved, and the application range is wide.

Description

Wake-up circuit and underwater acoustic communication machine

Technical Field

The application relates to the technical field of underwater acoustic communication, in particular to a wake-up circuit and an underwater acoustic communication machine.

Background

At present, the domestic underwater acoustic communication machine emphasizes on the improvement of communication distance and the optimization of communication quality, and the continuous progress of the underwater acoustic communication technology and the long-time underwater application demand put forward higher and higher requirements on low power consumption. In the current domestic low-power-consumption scheme, the research on how to efficiently and timely wake up the underwater acoustic communication machine after the underwater acoustic communication machine is in a dormant state or is turned off is less. In addition, in the prior art, it is difficult to obtain the underwater sound awakening signal by a stable and reliable method and awaken the underwater sound communication machine in time.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the prior art cannot stably and reliably receive an underwater sound wake-up signal to wake up an underwater sound communicator in time, the embodiment of the application provides a wake-up circuit and an underwater sound communicator.

In a first aspect, an embodiment of the present application provides a wake-up circuit, where the wake-up circuit includes:

the receiving processing module is used for receiving the underwater sound signals in real time and preprocessing the underwater sound signals to obtain electric signals;

the detection channel is connected with the receiving processing module and is used for identifying and detecting the electric signals and outputting corresponding detection result signals according to the identification and detection results;

the judging module is connected with all the detection channels and used for judging the time sequence relation of the output pulses corresponding to all the detection channels, and if the time sequence relation meets the preset awakening time sequence relation, an awakening signal is generated, wherein the output pulse corresponding to each detection channel is generated by the detection result signal output by the corresponding detection channel;

and the awakening module is connected with the judging module and the underwater sound communication circuit of the underwater sound communication machine and is used for starting the underwater sound communication circuit according to the received awakening signal so as to awaken the underwater sound communication machine.

Optionally, the output pulse corresponding to each detection channel is generated by a detection result signal output by the detection channel corresponding to the preset duration.

Optionally, the receiving processing module includes a receiving sub-module and an amplifying sub-module electrically connected to each other, the amplifying sub-module is respectively connected to all the detection channels, and the preprocessing includes conversion processing and amplification processing;

the receiving submodule is used for receiving the underwater sound signals and converting the underwater sound signals to obtain corresponding electric signals;

and the amplifying submodule is used for amplifying the electric signal.

Optionally, the detection channel includes a filtering submodule and a detection submodule electrically connected, the filtering submodule is connected with the receiving processing module, and the detection submodule is connected with the judgment module;

the filtering submodule is used for filtering and amplifying the electric signals to obtain corresponding target signals;

and the detection submodule is used for identifying whether the target signal obtained by detecting the corresponding filtering submodule meets the preset standard of the detection submodule or not and outputting a corresponding detection result signal according to the identification detection result.

Optionally, the detection submodule is specifically configured to output a detection result signal at a low level if the target signal obtained by the corresponding filtering submodule meets a preset standard of the detection submodule; and if the target signal obtained by the corresponding filtering submodule does not accord with the preset standard of the detection submodule, the output detection result signal is at a high level.

Optionally, the detection submodule is specifically configured to identify whether a signal parameter of the target signal obtained by detecting the corresponding filtering submodule falls within a preset signal parameter range of the detection submodule;

wherein the signal parameter comprises a signal frequency, and/or a signal amplitude.

The signal frequency includes the center frequency and bandwidth of the signal.

Optionally, the filtering submodule includes an operational amplifier and a dual T trap circuit electrically connected to each other, and the dual T trap circuit is disposed on a negative feedback loop of the operational amplifier. Optionally, the wake-up circuit further comprises a wake-up circuit control module connected with the judgment module and a first power supply;

the wake-up circuit control module is used for controlling the first power supply to stop supplying power to the wake-up circuit according to the wake-up signal.

Optionally, the underwater acoustic communicator includes a second power supply for supplying power to the underwater acoustic communication circuit, and the wake-up module is connected to the underwater acoustic communication circuit through the second power supply;

the awakening module is specifically used for controlling the second power supply to supply power to the underwater sound communication circuit according to the awakening signal so as to start the underwater sound communication circuit and awaken the underwater sound communication machine.

Optionally, the detection channel is capable of recognizing that the frequency of the detected electrical signal is adjustable;

the output pulse corresponding to each detection channel comprises a plurality of sub-pulses with alternate high and low levels;

the time sequence relation comprises the sequence of the sub-pulses in all the output pulses, the time interval and the duration of each sub-pulse.

Optionally, the determining module includes a programmable logic device, and the determining module is specifically configured to perform timing relationship determination on all output pulses corresponding to all detection channels through the programmable logic device.

In a second aspect, an embodiment of the present application provides an underwater acoustic communicator, which includes an underwater acoustic communication circuit and the aforementioned wake-up circuit.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

the receiving processing module in the wake-up circuit in the embodiment of the application is used for receiving the underwater sound signal in real time and preprocessing the underwater sound signal to obtain an electric signal; each detection channel is used for identifying and detecting the electric signals and outputting corresponding detection result signals according to identification and detection results; the judging module is used for judging the time sequence relation of output pulses corresponding to all the detection channels, and generating a wake-up signal when the time sequence relation of the output pulses meets a preset wake-up time sequence relation, wherein the output pulse corresponding to each detection channel is generated by a detection result signal output by the corresponding detection channel; the awakening module is connected with the underwater sound communication circuit of the underwater sound communicator and used for awakening the underwater sound communicator by starting the underwater sound communication circuit according to the awakening signal. The underwater acoustic communication device capable of waking up the whole system only depends on the wake-up circuit to receive the specific underwater acoustic wake-up signal after the underwater acoustic communication device (equipment) enters the low-power-consumption sleep mode or is powered off, and the whole system can be woken up. Because the underwater environment is more complicated, different waters, different seasons and the like, the underwater sound channels are different, and the propagation characteristics of signals with different frequencies in the underwater sound channels are different, therefore, aiming at different underwater environments, the frequency of the underwater sound awakening signal is also different, the electric signals (the electric signals corresponding to the underwater sound awakening signal) which can be identified and detected by the detection channel can be adjusted according to the actual underwater environment, the underwater sound awakening signal can adapt to the variability of the underwater environment and the requirements of different communication frequency bands, the awakening reliability is improved, and the underwater sound awakening signal awakening device is applicable to awakening the underwater sound communicator through the underwater sound awakening signals with different frequencies, and the application range is enlarged.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a block diagram of a wake-up circuit according to an embodiment of the present disclosure;

fig. 2 is a signal diagram of a plurality of sub-underwater acoustic wake-up signals according to an embodiment of the present application;

FIG. 3 is a waveform diagram of an output pulse according to an embodiment of the present application;

fig. 4 is a block diagram of another wake-up circuit according to an embodiment of the present application;

fig. 5 is a block diagram of an underwater acoustic communication device according to an embodiment of the present application;

fig. 6 is a circuit diagram of a filtering submodule provided in an embodiment of the present application;

fig. 7 is a circuit diagram of a detection submodule according to an embodiment of the present application.

Reference numerals: the underwater acoustic communication circuit comprises a receiving processing module 100, detection channels 200 (such as the detection channels 210, 220 and 230), a judging module 300, a waking module 400, a receiving sub-module 110, an amplifying sub-module 120, filtering sub-modules (211, 221 and 231), detection sub-modules (212, 222 and 232), an underwater acoustic communication circuit 20, a second power supply 30 and a waking circuit 10.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is a block diagram of a wake-up circuit according to an embodiment of the present disclosure. Referring to fig. 1, the wake-up circuit 10 includes a receiving processing module 100, at least one detecting channel 200 respectively connected to the receiving processing module 100, a determining module 300 respectively connected to all detecting channels 200, and a wake-up module 400 connected to the determining module 300.

Of course, the number of the detection channels in the present application may be any number, such as 1, 2, 3, 4, 5, and the like, but is not limited thereto. The specific number of the detection channels is determined by how many sub-underwater sound wake-up signals with different frequencies the underwater sound wake-up signal is designed into or how many sub-underwater sound wake-up signals with different frequencies the underwater sound wake-up signal contains. Different frequencies refer to different frequency points or different frequency bands, and when the different frequencies are different frequency bands, no overlapped frequency points exist between the frequency bands.

When the number of the detection channels is one, the underwater acoustic wake-up signal can be several sub-underwater acoustic wake-up signals with the same frequency, and a certain time interval is kept between the sub-underwater acoustic wake-up signals.

Preferably, each frequency of the sub-hydroacoustic wake-up signal of the present application can only pass through one detection channel 200, and each detection channel 200 can only pass through one frequency of the sub-hydroacoustic wake-up signal.

The wake-up circuit 10 of the present application may be disposed in an underwater acoustic communication device and connected to other modules in the underwater acoustic communication device; or the underwater sound communication device can be independently arranged outside the underwater sound communication device after being specially packaged, is arranged in an underwater environment and is electrically and mechanically connected with the underwater sound communication device to be awakened.

The receiving processing module 100 is configured to receive the underwater acoustic signal in real time, and preprocess the underwater acoustic signal to obtain an electrical signal.

Specifically, the underwater acoustic communicator and the wake-up circuit 10 are both disposed in an underwater environment, the wake-up circuit 10 is configured to wake up the underwater acoustic communicator, and the underwater acoustic communicator receives an underwater acoustic wake-up signal through the wake-up circuit 10 to wake up the underwater acoustic wake-up signal. This application is through receiving processing module 100 real-time reception underwater sound signal, and this underwater sound signal may be external noise or non-underwater sound wake-up signal, also may be real underwater sound wake-up signal, still may be the sub-underwater sound wake-up signal who constitutes underwater sound wake-up signal, consequently, need awaken circuit 10 and carry out validity discernment to the underwater sound signal and detect, discernment detection underwater sound signal whether be underwater sound wake-up signal or sub-underwater sound wake-up signal. The underwater acoustic signal is a sound wave, and belongs to mechanical waves. The receiving and processing module 100 needs to preprocess the underwater acoustic signal: the received underwater acoustic signal in the form of a mechanical wave is converted into an electrical signal.

Optionally, the receiving and processing module 100 is only used for receiving the underwater acoustic signal in real time when the underwater acoustic communicator is not in the wake-up state, and pre-processing the underwater acoustic signal to obtain an electric signal; when the underwater acoustic communication machine is in the awakened state, each module in the awakening circuit 10 can be set to stop working.

The detection channel 200 performs identification and detection through the electric signal corresponding to the underwater acoustic signal to obtain a detection result. The identification and detection specifically comprise: and detecting whether the electric signal meets the preset standard of the detection channel. The detection result comprises the following steps: the electrical signal meets the preset standard of the detection channel, or the electrical signal does not meet the preset standard of the detection channel.

According to the detection result, each detection channel 200 outputs a corresponding detection result signal. The detection result signal represents whether the current detected electric signal meets the preset standard corresponding to the detection channel.

The judging module 300 is configured to perform timing relationship judgment on output pulses corresponding to all detection channels, and generate a wake-up signal when the timing relationship satisfies a preset wake-up timing relationship.

Specifically, the output pulse corresponding to each detection channel is generated by the detection result signal output by the corresponding detection channel.

In one implementation, the output pulse of each detection channel is generated by a detection result signal output by the detection channel corresponding to a preset duration. The preset duration can be set as long as needed.

Taking the underwater acoustic wake-up signal as an example, the underwater acoustic wake-up signal is designed as 3 sub-underwater acoustic wake-up signals with different frequencies, refer to fig. 2 and 3. Fig. 2 is a signal diagram of a plurality of sub-hydroacoustic wake-up signals according to an embodiment of the present application, where the hydroacoustic wake-up signals are designed as 3 segments of sub-hydroacoustic wake-up signals with different frequencies, a horizontal axis represents time(s), and a vertical axis represents signal magnitude of each segment of the sub-hydroacoustic wake-up signals. Preferably, each sub-hydroacoustic wake-up signal is a sinusoidal signal. The duration of the first sub-underwater sound awakening signal is 0.1s, and the sending time period is within 0-0.1 s; the time interval between the first sub-underwater sound awakening signal and the second sub-underwater sound awakening signal is 0.1 s; the duration of the second sub-underwater sound awakening signal is 0.1s, and the sending time period is within 0.2-0.3 s; the time interval between the second sub-underwater sound awakening signal and the third sub-underwater sound awakening signal is 0.1 s; the duration of the third sub-underwater sound awakening signal is 0.1s, and the sending time period is within 0.4-0.5 s. Of course, fig. 2 is only a specific embodiment of the present application, and under different underwater environments and transmission requirements, the underwater acoustic wake-up signal may be designed to have multiple segments, such as 2 segments, 4 segments, and the like, and meanwhile, the frequency, the transmission duration (duration) and the time interval between adjacent sub-underwater acoustic wake-up signals of the sub-underwater acoustic wake-up signal may be adjusted according to specific situations to adapt to different underwater environments and transmission requirements. The electric signal (the electric signal corresponding to the underwater sound awakening signal) capable of being identified and detected by the detection channel can be adjusted according to the actual underwater environment, the variability of the underwater environment and the requirements of different communication frequency bands can be met, the awakening reliability is improved, the underwater sound awakening device can be suitable for awakening the underwater sound communicator through the underwater sound awakening signals with various different frequencies, and the application range is enlarged.

Fig. 3 is a waveform diagram of an output pulse according to an embodiment of the present application. Fig. 3 is a diagram showing that, on the basis of fig. 2, 3 detection channels respectively identify and detect the electrical signals corresponding to the 3 sub-hydroacoustic wakeup signals and then output detection result signals, and each sub-hydroacoustic wakeup signal is a segment of signal with duration or transmission duration, so that the corresponding detection result signal is also a segment of signal with duration, and further the detection result signals output by each detection channel constitute output pulses.

In this embodiment, the detection channel 200 is specifically configured to output a detection result signal at a low level if the sub-underwater sound wake-up signal meets a preset standard of the detection channel 200, and output a detection result signal at a high level if the sub-underwater sound wake-up signal does not meet the preset standard of the detection channel 200.

The wake-up module 400 is specifically configured to control the second power supply 30 to supply power to the underwater acoustic communication circuit 20 according to the wake-up signal to turn on the underwater acoustic communication circuit and wake up the underwater acoustic communication device.

The embodiment of the utility model provides an to having the underwater acoustic communicator that awakens up the demand through outside underwater acoustic signal, after underwater acoustic communicator (equipment) got into low-power consumption sleep mode or outage shutdown, only rely on a wake-up circuit to receive specific underwater acoustic wake-up signal, just can awaken up entire system. Because the underwater environment is complex, the underwater sound channels in different water areas, different seasons and the like are different, and the propagation characteristics of signals with different frequencies in the underwater sound channels are different, the frequencies of the underwater sound awakening signals are different for different underwater environments.

Fig. 4 is a block diagram of another wake-up circuit according to an embodiment of the present application; the receiving processing module 100 includes a receiving sub-module 110 and an amplifying sub-module 120, the detection channel 210 includes a filtering sub-module 211 and a detection sub-module 212, the detection channel 220 includes a filtering sub-module 221 and a detection sub-module 222, the detection channel 230 includes a filtering sub-module 231 and a detection sub-module 232, the filtering sub-modules (211, 221, 231) are respectively connected with the amplifying sub-module 120, and the detection sub-modules (212, 222, 232) are respectively connected with the judging module 300.

The receiving submodule 110 is configured to receive an underwater acoustic signal, and perform conversion processing on the underwater acoustic signal to obtain a corresponding electrical signal; the amplifier sub-module 120 is used for amplifying the electrical signal.

The receiving sub-module 110 may include a transducer and the amplifying sub-module 120 may include a pre-amplification circuit.

The filtering sub-modules (211, 221, 231) are all used for receiving the amplified electrical signals transmitted by the amplifying sub-module 120, and performing filtering and amplifying processing on the electrical signals to obtain corresponding target signals.

The filtering sub-modules (211, 221 and 231) comprise narrow-band filtering circuits, and non-target signals meeting the filtering standards of the filtering sub-modules (211, 221 and 231) can be filtered to obtain target signals.

As shown in fig. 4, taking 3 detection channels as an example, the detection channels include detection channels (210, 220, 230), each detection channel (210, 220, 230) performs identification detection on the electrical signals transmitted by the receiving processing module 100, and the purpose of the identification detection is to determine which electrical signals are electrical signals that can be identified or detected by the detection channel, and which electrical signals are electrical signals that cannot be identified or detected by the detection channel. It can also be understood which electrical signals can pass through the detection channel without being filtered out by the detection channel.

Specifically, the underwater sound wake-up signal of the present application is sent by a wake-up end, and the wake-up end may be other underwater sound communication devices. Other underwater acoustic communicators can be arranged under the water surface platform, the buoy and the submerged buoy, including but not limited to the underwater environment of the platforms, and the other underwater acoustic communicators send underwater acoustic wake-up signals to the underwater acoustic communicators to be woken up in the application.

The underwater wake-up signal is a single frequency signal, such as a sine function signal, of a known specific frequency. Because the underwater environment is complex, the underwater acoustic channels in different water areas, different seasons and the like are different, and the propagation characteristics of signals with different frequencies in the underwater acoustic channels are different, in order to adapt to the variability of the underwater environment and the requirements of different communication frequency bands and improve the awakening reliability, the underwater acoustic awakening signal can be designed into two, three or even multiple sections of sub-underwater acoustic awakening signals with different frequencies and time sequence relation. The electric signal corresponding to each sub-underwater sound awakening signal can only pass through one detection channel. Accordingly, each detection channel is designed to allow only electrical signals of a target frequency to pass through. This application can design into the sub-underwater sound awakening signal of the different frequencies of multistage with the underwater sound awakening signal according to multiple factors such as actual transmission demand and underwater environment, and the frequency is selected, and the duration (transmission duration), the interval time of the sub-underwater sound awakening signal of every frequency, signal strength or size can all adjust according to specific demand even.

Meanwhile, according to the underwater environment, the transmission requirement and the frequency characteristic (frequency parameter) of the sub underwater sound awakening signal, the detection channel can be correspondingly designed. The underwater acoustic wake-up signal is designed into how many segments of sub-underwater acoustic wake-up signals correspond to how many different detection channels exist.

As shown in fig. 3, the output pulse corresponding to the detection channel 210 is the first output pulse, the output pulse corresponding to the detection channel 220 is the second output pulse, and the output pulse corresponding to the detection channel 230 is the third output pulse. The first output pulse, the second output pulse and the third output pulse all comprise a plurality of sub-pulses with alternate high and low levels. The first output pulse has a segment of sub-pulse with low level, and other sub-pulses with high level, which indicates that the sub-underwater sound wake-up signal detected by the detection channel 210 meets the preset standard of the detection channel 210 in the time segment when the sub-pulse with low level appears; in the same time period, the detection channels 220 and 230 are both high-level sub-pulses, which means that the sub-hydroacoustic wake-up signals detected by the detection channels 220 and 230 do not meet the preset standard of the detection channels 220 and 230 in the time period.

The second output pulse has a section of sub-pulse with low level, and other sub-pulses with high level, which indicates that the sub-underwater sound wake-up signal detected by the detection channel 220 meets the preset standard of the detection channel 220 in the time period of the sub-pulse with low level; in the same time period, the detection channels 210 and 230 are both high-level sub-pulses, which indicates that the sub-hydroacoustic wake-up signals detected by the detection channels 210 and 230 do not meet the preset standard of the detection channels 210 and 230 in the time period.

The third output pulse has a segment of sub-pulse with low level, and other sub-pulses with high level, which indicates that the sub-underwater sound wake-up signal detected by the detection channel 230 meets the preset standard of the detection channel 230 in the time segment when the sub-pulse with low level appears; in the same time period, the detection channel 210 and the detection channel 220 are both high-level sub-pulses, which indicates that the sub-hydroacoustic wake-up signals detected by the detection channel 210 and the detection channel 220 do not meet the preset standard of the detection channel 210 and the detection channel 220 in the time period.

The preset criteria of the detection channels (210, 220, 230) are different, so that the time periods during which the sub-pulses of low level occur do not coincide. The sequence, time interval and duration of the sub-pulses with low level in the output pulses corresponding to the 3 detection channels represent the time sequence relationship between the output pulses.

In a preferred embodiment, the filtering sub-modules (211, 221, 231) filter out non-target signals that are not within the target frequency by means of filtering frequencies, and retain the target signal at the target frequency, and an electrical signal meets the filtering criteria of at most one filtering sub-module, because the filtering criteria of each filtering sub-module are different and the target frequency ranges do not overlap. An electrical signal may not fall within the target frequency range of any one of the filtering sub-modules, or may fall within the target frequency range of one of the filtering sub-modules.

The detection submodules (212, 222 and 232) are all used for identifying whether the target signals obtained by the corresponding filtering submodules meet the preset standard of the detection submodules or not and outputting corresponding detection result signals according to the identification detection results.

The detection sub-modules (212, 222, 232) are specifically configured to output a detection result signal at a low level if the target signal obtained by the corresponding filtering sub-module meets the preset standard of the detection sub-module, and output a detection result signal at a high level if the target signal obtained by the corresponding filtering sub-module does not meet the preset standard of the detection sub-module.

The detection sub-modules (212, 222, 232) are specifically used for identifying whether signal parameters of the target signals obtained by detecting the corresponding filtering sub-modules fall within the preset signal parameter range of the detection sub-modules; wherein the signal parameter comprises a signal frequency, and/or a signal amplitude.

Preferably, the signal frequency comprises the centre frequency and the bandwidth of the signal.

The detection sub-modules (212, 222, 232) are specifically configured to identify whether a center frequency and a bandwidth of a target signal obtained by detecting the corresponding filtering sub-module fall within a preset frequency range of the detection sub-module, and whether an amplitude of the target signal falls within a preset signal amplitude range of the detection sub-module. The predetermined frequency range is the frequency and bandwidth detectable by the detection submodule. If the center frequency and the bandwidth of the target signal fall within the preset frequency range of the detection submodule and the amplitude of the target signal falls within the preset signal amplitude range of the detection submodule, the detection result signal output by the detection submodule is a low level; and if the central frequency and the bandwidth of the target signal do not fall within the preset frequency range of the detection submodule or the amplitude of the target signal does not fall within the preset signal amplitude range of the detection submodule, the detection result signal output by the detection submodule is at a high level.

Referring to fig. 3, 3 output pulses are respectively formed by detection result signals output by the detection submodules in the corresponding detection channels.

Optionally, the 3 output pulses are respectively formed by detection result signals output by detection submodules in detection channels corresponding to the preset duration.

In another embodiment of the present application, the wake-up circuit 10 further includes a wake-up circuit control module connected to the determining module 300, and a first power supply; the wake-up circuit control module is configured to control the first power supply to stop supplying power to the wake-up circuit 10 according to the wake-up signal.

Specifically, the wake-up circuit 10 is configured to receive an external underwater sound signal in real time, determine whether the underwater sound signal is an underwater sound wake-up signal, and generate a wake-up signal if the underwater sound signal is the underwater sound wake-up signal, where the wake-up signal is used to turn on the underwater sound communication circuit, so as to wake up the underwater sound communication device. The underwater acoustic communication machine comprises an underwater acoustic communication circuit, various functions of the underwater acoustic communication machine are realized mainly through the underwater acoustic communication circuit, the underwater acoustic communication machine can be awakened and started to work after the awakening signal is generated, and at the moment, the awakening circuit 10 can be set to be in a dormant state without continuously receiving an external underwater acoustic signal when the underwater acoustic communication machine is in an awakened state, so that electric energy is saved.

The various modules (the receiving sub-module 110, the amplifying sub-module 120, the detection channels (210, 220, 230), the determining module 300 and the wake-up module 400) in the wake-up circuit 10 are powered by the first power supply, and the first power supply is controlled by the wake-up circuit control module to start or stop power supply. If the wake-up circuit control module receives the wake-up signal provided by the determination module 300, the wake-up circuit control module controls the first power supply to stop supplying power to the wake-up circuit 10, and after the underwater acoustic communication device is started, the wake-up circuit 10 automatically stops working, so as to achieve the effects of energy saving and power saving. Before the underwater acoustic communication machine needs to enter the sleep state, the power supply (namely the first power supply) of the wake-up circuit is turned on again by the underwater acoustic communication machine, so that the wake-up circuit enters the working state again. Specifically, before the underwater acoustic communication device goes to sleep, the underwater acoustic communication circuit 20 provides a circuit wake-up signal to the first power supply, so that the first power supply starts to supply power to the wake-up circuit, and the wake-up circuit restarts to work.

Fig. 5 is a block diagram of an underwater acoustic communication device according to an embodiment of the present application; the underwater acoustic communicator comprises a second power supply 30 for supplying power to the underwater acoustic communication circuit 20, and the wake-up module 400 is connected with the underwater acoustic communication circuit 20 through the second power supply 30.

The wake-up module 400 is specifically configured to control the second power supply 30 to supply power to the underwater acoustic communication circuit 20 according to the wake-up signal to turn on the underwater acoustic communication circuit and wake up the underwater acoustic communication device.

Preferably, the underwater acoustic communicator includes a wake-up circuit 10, an underwater acoustic communication circuit 20, and a second power supply 30. The wake-up circuit 10 is packaged inside the underwater acoustic communicator.

Preferably, the first power supply and the second power supply 30 are the same power supply.

The underwater acoustic communication circuit 20 includes a digital circuit unit and an underwater acoustic signal transceiving analog circuit unit, and the underwater acoustic communication circuit 20 is a main functional module for realizing signal interaction between the underwater acoustic communication device and other underwater acoustic communication devices.

In a particular embodiment, the filtering sub-modules 211, 221, 231 each include an operational amplifier and a dual T trap circuit electrically connected. As shown IN fig. 6 and 7, the non-inverting Input terminal + IN of the operational amplifier of the filtering submodule (211, 221, 231) is connected to the output terminal of the receiving processing module 100 through a resistor R4, the signal Input1 output by the output terminal of the receiving processing module 100 is used as the Input of the filtering submodule, the inverting Input terminal-IN of the operational amplifier is connected to one end of a resistor R1 and one end of a capacitor C2, the other end of the resistor R1 is connected to one end of a resistor R2 and one end of a capacitor C1, the other end of the capacitor C2 is connected to one end of a resistor R3 and one end of a capacitor C3, the other end of the capacitor C1 and the other end of the resistor R3 are both grounded, and the other end of the resistor R2 is connected to the other end of a capacitor C3 and the output terminal of the operational amplifier. The Input1 signal is an electrical signal that has been pre-processed by the receive processing module 100.

The resistors R1, R2 and R3 and the capacitors C1, C2 and C3 form a double-T wave trap circuit, and the double-T wave trap circuit is arranged on a negative feedback loop of the operational amplifier to form a narrow-band filter. The operational amplifier is powered by a first power supply.

The underwater acoustic wake-up signal is a single-frequency signal and may have a plurality of different frequencies, so that the underwater acoustic wake-up signal needs to be designed into a plurality of sub-underwater acoustic wake-up signals, and a corresponding detection channel is designed for each sub-underwater acoustic wake-up signal. The band-pass filter comprises a double-T wave trap circuit and an operational amplifier, wherein the double-T wave trap circuit is a symmetrical trap circuit which greatly attenuates the central frequency, the double-T circuit is arranged in a negative feedback loop of the operational amplifier, and the negative feedback loop has great impedance to a set frequency point signal, so that the frequency point signal is amplified, the impedance to other frequencies is small, and little amplification is needed, so that the double-T wave trap circuit becomes a circuit for amplifying a certain frequency point signal. However, the precision of the capacitor and the resistor, especially the precision of the capacitor, is considered, and the precision cannot be made very high under the current process conditions. Therefore, in the application, the parameters of the double T circuit are properly adjusted, so that the signals outside the central frequency and corresponding to the triggering signal bandwidth range are not attenuated too fast, and the bandwidth of the double T trap circuit is properly increased, so that the central frequency of the double T trap circuit can be allowed to have a certain deviation from the frequency of the awakening signal.

The Output1 signal Output by the Output terminal of the operational amplifier is connected with the input terminal of the detection submodule. The Output1 signal is a target signal obtained after the corresponding filtering submodule performs filtering processing. Referring to fig. 7, the detection sub-modules (212, 222, 232) are all audio detection sub-modules, each detection sub-module includes an audio detection chip U61, an Output1 signal is connected to a third pin (an input end of the chip U61) of the chip U61 through a capacitor C5, a first pin of the chip U61 is grounded through a capacitor C8, a second pin is grounded through a capacitor C9, a fourth pin is connected to a power source Vs, the fourth pin is also grounded through capacitors C4 and C7 which are connected in parallel, the fourth pin is also connected to an eighth pin through a resistor R5, the sixth pin is grounded through a capacitor C6, the fifth pin is connected to the sixth pin through a resistor R6, the seventh pin is grounded, the eighth pin is an Output end of the chip U61, and an Output2 signal is transmitted to the determination module 300. The Output2 signal is a detection result signal Output by the corresponding detection submodule. The detection result signal is a high level signal or a low level signal.

The power source Vs is generated by a first power supply source.

Referring to fig. 7, the center frequency of the detectable frequency of the detection submodule can be set by adjusting the values of R6 and C6, and the bandwidth of the detectable frequency of the detection submodule can be set by adjusting the value of C9, so as to adapt to the underwater acoustic wake-up signal or the sub-underwater acoustic wake-up signal corresponding to different underwater environments and transmission requirements.

The detection sub-module (212, 222, 232) sets the detectable frequency and bandwidth through configuration of the capacitance-resistance parameter. When the signal conforming to the corresponding frequency is not detected, the output pin outputs a high level; when the signal is detected to be within the set frequency range and meet a certain amplitude requirement, an output pin of the detection submodule (212, 222, 232) outputs a low-level signal until the high level is recovered after the frequency is not detected. Referring specifically to fig. 3, for the three-way detection sub-module (212, 222, 232) to detect 3 sub-underwater sound wake-up signals with different frequencies and a certain time interval, the output pins of the 3 detection sub-modules respectively output low level signals at different time intervals.

The judging module 300 includes a programmable logic device, the judging module 300 judges a timing relationship of at least one group of output pulses through the internal programmable logic device, and if the timing relationship of at least one group of output pulses meets a preset wake-up timing relationship in the programmable logic device, that is, if the timing logic or relationship among the received multiple sub-underwater sound wake-up signals conforms to the preset wake-up timing logic, the judging module 300 generates a wake-up signal and transmits the wake-up signal to the wake-up module 400. The underwater sound awakening signals are formed by the sub-underwater sound awakening signals.

The wake-up module 400 turns on the underwater acoustic communication circuit according to the wake-up signal, thereby waking up the underwater acoustic communication device.

Specifically, the wake-up module 400 controls the second power supply 30 to supply power to the underwater acoustic communication circuit 20 according to the wake-up signal, so as to turn on the underwater acoustic communication circuit 20, thereby waking up the underwater acoustic communication device.

In another embodiment, the wake-up module 400 of the present application is directly connected to the underwater acoustic communication circuit 20, and the wake-up module 400 controls the underwater acoustic communication circuit 20 to be turned on according to the wake-up signal, so as to turn on the underwater acoustic communication circuit 20, thereby waking up the underwater acoustic communication device.

The underwater sound awakening signal is composed of a plurality of sections of sub-underwater sound awakening signals with different frequencies, so that each detection submodule has a group of output pulses generated by a plurality of corresponding detection result signals, the judgment module 300 judges the time sequence relation of the output pulses corresponding to all the groups of detection submodules, when the time sequence relation meets the preset awakening time sequence relation designed according to the underwater sound awakening signal, a final awakening signal is generated, and the awakening signal is used for turning on a power switch of the underwater sound communication machine to finish the work of awakening the underwater sound communication machine.

This application designs into the sub-underwater sound wake-up signal of multistage frequency with the underwater sound wake-up signal, and send according to certain time interval, every sub-underwater sound wake-up signal of receiving processing module real-time reception and processing among the wake-up circuit obtains the signal of telecommunication, every detection channel discerns the detection to the signal of telecommunication, the detection result signal that corresponds is exported according to discernment detection result, every detection channel can be handled a plurality of signals of telecommunication that a plurality of sub-underwater sound wake-up signal correspond, consequently, can obtain a plurality of detection result signals, a set of output pulse has been constituteed to a plurality of detection result signals, the judgement module carries out the time sequence relation judgement to a plurality of detection channel's output pulse, if the time sequence relation of multiunit output pulse satisfies when predetermineeing the wake-up time sequence relation, generate the wake-up signal, and then according to the wake-up signal underwater sound communication machine.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A wake-up circuit, the circuit comprising:

the receiving processing module is used for receiving the underwater sound signals in real time and preprocessing the underwater sound signals to obtain electric signals;

the detection channel is connected with the receiving processing module and used for carrying out identification detection on the electric signals and outputting corresponding detection result signals according to identification detection results;

the judging module is connected with all the detection channels and used for judging the time sequence relation of the output pulses corresponding to all the detection channels, and generating a wake-up signal when the time sequence relation meets a preset wake-up time sequence relation, wherein the output pulse corresponding to each detection channel is generated by a detection result signal output by the corresponding detection channel;

and the awakening module is connected with the judging module and the underwater sound communication circuit of the underwater sound communication machine and used for starting the underwater sound communication circuit according to the received awakening signal so as to awaken the underwater sound communication machine.

2. The circuit of claim 1, wherein the receiving processing module comprises a receiving submodule and an amplifying submodule which are electrically connected, the amplifying submodule is respectively connected with each detection channel, and the preprocessing comprises conversion processing and amplification processing;

the receiving submodule is used for receiving the underwater sound signal and converting the underwater sound signal to obtain a corresponding electric signal;

and the amplification submodule is used for amplifying the electric signal.

3. The circuit of claim 1, wherein the detection channel comprises a filtering submodule and a detection submodule which are electrically connected, the filtering submodule is connected with the receiving and processing module, and the detection submodule is connected with the judging module;

the filtering submodule is used for filtering and amplifying the electric signals to obtain corresponding target signals;

and the detection submodule is used for identifying whether the target signal obtained by detecting the corresponding filtering submodule meets the preset standard of the detection submodule or not and outputting a corresponding detection result signal according to the identification detection result.

4. The circuit according to claim 3, wherein the detection submodule is specifically configured to output a detection result signal at a low level if a target signal obtained by the corresponding filtering submodule meets a preset standard of the detection submodule; and if the target signal obtained by the corresponding filtering submodule does not accord with the preset standard of the detection submodule, the output detection result signal is high level.

5. The circuit according to claim 3, wherein the detection submodule is specifically configured to identify whether a signal parameter of a target signal obtained by detecting the corresponding filtering submodule falls within a preset signal parameter range of the detection submodule;

the signal parameter comprises a signal frequency, and/or a signal amplitude.

6. The circuit of claim 3, wherein the filtering submodule comprises an operational amplifier and a dual T trap circuit electrically connected, the dual T trap circuit being disposed on a negative feedback loop of the operational amplifier.

7. The circuit of claim 1, wherein the wake-up circuit further comprises a wake-up circuit control module connected to the determination module, a first power supply;

and the wake-up circuit control module is used for controlling the first power supply to stop supplying power to the wake-up circuit according to the wake-up signal.

8. The circuit of claim 1, wherein the underwater acoustic communicator comprises a second power supply for powering the underwater acoustic communication circuit, and wherein the wake-up module is connected to the underwater acoustic communication circuit via the second power supply;

the awakening module is specifically used for controlling the second power supply to supply power to the underwater sound communication circuit according to the awakening signal so as to start the underwater sound communication circuit and awaken the underwater sound communication machine.

9. The circuit of claim 1, wherein the detection channel is capable of identifying that a signal parameter of the detected electrical signal is adjustable;

the output pulse corresponding to each detection channel comprises a plurality of sub-pulses with alternate high and low levels;

the time sequence relation comprises the sequence of the sub-pulses in all the output pulses, the time interval and the duration of each sub-pulse.

10. An underwater acoustic communicator comprising an underwater acoustic communication circuit and a wake-up circuit as claimed in any one of claims 1 to 9.

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