low noise high precision signal processing system based on adcp
A signal processing, high-precision technology, used in fluid velocity measurement, velocity/acceleration/impact measurement, measurement devices, etc., can solve problems such as unsatisfactory results, and achieve the effect of reducing power consumption
Active Publication Date: 2018-04-17
江苏中海达海洋信息技术有限公司
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Problems solved by technology
But the final result is still unsatisfactory and cannot effectively solve the above problems
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[0022] The present invention and its effects will be further described below in conjunction with the accompanying drawings and embodiments.
[0023] To solve the technical problems in the existing technology, on the one hand, we improve the receiving module and add a low-noise and high-precision signal processing system; on the other hand, we process the power supply and ground.
[0024] 1. Design of low noise and high precision signal processing system:
[0025] Such as figure 1 As shown, a low-noise high-precision signal processing system based on ADCP includes sequentially connected RF transformers, filter amplifier circuits, passive π filters and follower circuits; four identical low-noise High-precision signal processing system, one-to-one correspondence with the four-way transducer array of the transducer module; it can perform analog noise reduction and high-precision extraction on the differential signal received by the transducer, and send the processed signal to AD...
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The invention provides an ADCP-based low-noise and high-precision signal processing system, which includes sequentially connected RF transformers, filter amplifier circuits, passive π filters and follower circuits. The present invention improves the signal receiving circuit of ADCP, adds a low-noise high-precision signal processing system, and by setting an RF radio frequency transformer, a passive π filter and a voltage follower circuit, the weak echo signal to be measured received by the transducer can be The analog noise reduction and high-precision extraction can effectively reduce the design difficulty of filter circuits and digital processing circuits, and improve the precision of digital processing. On the other hand, the power supply and ground are processed, and the improvement of the power supply part can effectively increase the power utilization rate and reduce the interference of power supply noise to the subsequent circuit. The improvement of the ground part can realize the division of digital and analog ground, effectively reduce the interference caused by the noise generated by the digital circuit part to the analog part, and improve the measurement accuracy of the analog part.
Description
technical field [0001] The invention belongs to the technical field of ocean detection, and relates to a Doppler velocity profiler ADCP for ocean water flow velocity detection, specifically a low-noise and high-precision signal receiving and processing system based on the Doppler velocity profiler ADCP. Background technique [0002] ADCP, Acoustic Doppler Velocity Profiler, is a device for measuring water velocity based on the principle of acoustic Doppler. It mainly transmits sound waves through a transducer, and the sound waves are reflected in the water and then received by the transducer. The acoustic signal to be tested that the transducer can receive is a small amount, and most of the acoustic signal will be absorbed by the water body or reflected to other directions; therefore, the signal strength that the transducer can receive is only a weak voltage signal of about 0.3mV . The transducer receives differential signals, and there are many common-mode signals and nois...
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IPC IPC(8): H03M1/12G01P5/24
Inventor 童奇仇付鹏罗宇
Owner 江苏中海达海洋信息技术有限公司