Low-power-consumption single-frequency underwater acoustic signal detection and identification method
A technology of underwater acoustic signal and identification method, which is applied in the direction of measuring vibration, measuring device, and vibration measurement in fluid, etc., which can solve the problems of increasing the volume and total amount of the system, the analog circuit is susceptible to external interference, and reducing the stability of the system. Achieve the effects of low computation, reduced number of components, and low power consumption
Active Publication Date: 2020-05-01
750 TEST SITE OF CHINA SHIPBUILDING IND CORP
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Therefore, if this method needs to increase the battery capacity, it will not only increase the volume and total amount of the system, but also reduce the stability of the system because the analog circuit is susceptible to external interference.
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[0041] As attached to the manual Figure 1-2 As shown, a low-power single-frequency underwater acoustic signal detection and identification method, firstly, the underwater acoustic signal is obtained by the hydrophone 2, and the underwater acoustic signal is transmitted to the front circuit 3, and the underwater acoustic signal is amplified by 35dB in the front circuit 3 Afterwards, it is transmitted to the signal conditioning circuit 4, and the signal conditioning circuit 4 performs filter processing on the amplified underwater acoustic signal and transmits it to the microcontroller 5, where the microcontroller 5 collects and digitizes. The specific steps are as follows:
[0042] S1: Microprocessor initialization program, the initialization program includes variable initial assignment, clock configuration, interrupt setting, each port configuration, AD initialization configuration and start, wherein the variable initial assignment assigns the detection threshold value D1 to th...
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The invention discloses a low-power-consumption single-frequency underwater acoustic signal detection and identification method. According to the method, a conditioned single-frequency underwater acoustic signal is directly input to an ultra-low-power-consumption MCU, detection and identification of the single-frequency underwater acoustic signal are realized through a digital algorithm with a lowcalculation amount, and energy required by an analog detection circuit for single-frequency underwater acoustic signal detection is eliminated. Meanwhile, according to the method, identification of the single-frequency underwater acoustic signal is realized through the digital algorithm, and the anti-interference capability is higher than that of the analog detection circuit. The method can be used for single-frequency underwater acoustic signal detection of other frequencies without hardware modification. Meanwhile, the power consumption required by the method is obviously lower than that ofa traditional analog detection circuit, and the method has long-term underwater working capability. The method is small in size, light in gravity and convenient to implement, and has high applicationvalue in scenes such as underwater communication and positioning.
Description
technical field [0001] The invention belongs to the technical field of underwater acoustic measurement, and in particular relates to a low-power single-frequency underwater acoustic signal detection and identification method. Background technique [0002] Single-frequency underwater acoustic signals are often used as wake-up signals for ultra-low power duty circuits. These types of circuit systems work underwater for a long time and are powered by batteries. There is no external power input during work, and they can work for a long time (years) The power consumption of the signal acquisition and processing circuit is one of the important technical indicators. [0003] In the prior art, the detection and recognition of the single-frequency underwater acoustic signal is realized by an analog detection circuit, as shown in the attached image 3 shown. The detection circuit, noise threshold circuit, comparator circuit, and pulse width detection circuit are implemented by resist...
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IPC IPC(8): G01H3/04
CPCG01H3/04
Inventor 耿合龙段文海范赞江南程宏吴武刚
Owner 750 TEST SITE OF CHINA SHIPBUILDING IND CORP