CN211878181U - High-speed high-precision miniature phased array Doppler log - Google Patents
High-speed high-precision miniature phased array Doppler log Download PDFInfo
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- CN211878181U CN211878181U CN201920795623.0U CN201920795623U CN211878181U CN 211878181 U CN211878181 U CN 211878181U CN 201920795623 U CN201920795623 U CN 201920795623U CN 211878181 U CN211878181 U CN 211878181U
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Abstract
The utility model relates to a high-speed high-precision micro phased array Doppler log, which comprises a signal receiver, a signal transmitter, a digital processor and an energy converter which are arranged in a housing cavity; the transducer is an acoustic signal transmitting and receiving device with controllable transmitting direction; the signal receiver is an echo signal preprocessing unit and comprises a preamplifier circuit unit, a program-controlled amplifier circuit and a band-pass filter circuit which are connected in sequence; the signal transmitter is a driving unit for transmitting an acoustic signal by a transducer and comprises a power amplifying circuit; the digital processor is used for providing excitation signals for the signal transmitter and receiving and collecting data preprocessed by the signal receiver. The utility model discloses phased array Doppler log adopts subassembly form design, and 3 partial mainboards of transmission, receipt and processing adopt range upon range of formula assembly, have reduced the system volume, and each main part circuit adopts the modularized design, has reduced manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of survey navigation under water, especially a miniature phased array Doppler log of high-speed high accuracy.
Background
The phased array Doppler log is a system for measuring and positioning by using an acoustic principle, has high speed measurement precision and is widely applied at home and abroad.
Whether the fishing boat, the cargo ship, the warship or the submarine has accurate speed information and position information, and an accurate navigation positioning system is needed. The phased array Doppler log just meets the requirement of accurate navigation and positioning.
The doppler log was made available earlier, and the doppler log products were made available abroad since the seventies of the last century. Currently, the doppler log and related products are mainly foreign brands on the market, and known manufacturers include Sonardyne in the uk, Benthos and TRDI in the usa, Kongsberg Simrad in norway, and Ixsea in france. The research on the phased array Doppler log in China starts late, and a large gap exists between the phased array Doppler log and foreign products at present. However, with the increasing frequency of marine activities in the civil and military fields in China, the demand of a small-sized high-speed high-precision Doppler log will be more urgent.
At present, many companies and organizations in China develop and develop Doppler log products, but most of the phased array Doppler logs in the domestic market are low in positioning speed, poor in frequency measurement precision and large in system size, and cannot meet the requirements of higher levels. High-speed and high-precision miniature phased array Doppler log is rare.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a miniature phased array doppler log of high-speed high accuracy.
The utility model provides a technical scheme of above-mentioned problem does: a high-speed high-precision miniature phased array Doppler log comprises a signal receiver, a signal transmitter, a digital processor and a transducer, wherein the signal receiver, the signal transmitter and the digital processor are arranged in a cavity of a shell;
the transducer is an acoustic signal transmitting and receiving device with controllable transmitting direction;
the signal receiver is an echo signal preprocessing unit and comprises a preamplifier circuit unit, a program-controlled amplifier circuit and a band-pass filter circuit which are connected in sequence;
the signal transmitter is a driving unit for transmitting an acoustic signal by a transducer and comprises a power amplifying circuit;
the digital processor is used for providing excitation signals for the signal transmitter and receiving and collecting data preprocessed by the signal receiver.
According to the scheme, the digital processor comprises a main control DSP unit, an FPGA unit serving as an auxiliary controller and a storage unit connected with the main control DSP unit.
According to the scheme, the digital processor comprises a main control DSP unit used for calculating navigation data according to signal data preprocessed by the acquired signal receiver and an FPGA unit used for controlling and generating an excitation signal of the signal transmitter according to a DSP control instruction.
According to the scheme, the digital signal processor further comprises a storage unit for storing the acquired signal data preprocessed by the signal receiver and the resolved navigation data.
According to the scheme, the digital signal processor also comprises a data acquisition A/D differential channel connected with the signal receiver.
According to the scheme, the three circuit mainboards of the signal receiver, the signal transmitter and the digital processor are arranged in the cavity of the shell in a stacking type assembly mode.
According to the scheme, the shell cavity is a cylindrical shell cavity.
According to the scheme, the preamplification unit consists of a low-noise instrument amplifier and a phase-shifting network and completes preamplification and beam forming of weak signals; the program control amplification unit consists of a 4-order band-pass filter and a resistance attenuation network, and realizes the functions of noise suppression and gain program control; the band-pass filtering unit consists of an 8-order band-pass filter and a differential amplifier, and realizes the functions of re-filtering of signals and single-end to differential output.
According to the scheme, the power amplification circuit adopts a D type push-pull power amplification circuit of a high-frequency MOS tube.
The utility model discloses the beneficial effect that the device brought is:
1) the phased array Doppler log adopts a high-performance DSP as a core control and operation unit, the FPGA is used as an auxiliary controller, and an excitation signal is realized inside the FPGA, so that the parallel acquisition speed and the data operation processing capacity of the system are greatly improved, and the phased array Doppler log has the advantage of high-speed measurement.
2) The phased array Doppler log is designed in a subassembly mode and comprises 3 main boards for transmitting, receiving and processing, and the main boards are assembled in a laminated mode in a housing cavity, so that the space is saved to the maximum extent, the system volume is reduced, the appearance of the phased array Doppler log is a cylinder, the overall dimension can be designed to be smaller than ϕ 90mm x 100mm, and the phased array Doppler log has the advantage of miniaturization;
3) each main part circuit of the phased array Doppler log adopts a modular design, an advanced and mature module shell packaging technology is fully utilized, the anti-interference capability of weak signals of the system is improved, the stability and the reliability of the system are ensured, the development period is shortened, the production cost is reduced, and the cost performance is very high.
4) The phased array Doppler log adopts a differential mode to amplify, filter and collect signals, and a precise amplifying circuit and a band-pass filter circuit with low noise, high gain bandwidth product and large slew rate are designed to achieve the effects of low noise and low distortion of a receiving channel, so that the phased array Doppler log has the advantage of high precision.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;
fig. 2 is a block diagram of a receiver structure of an apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1, the DSP-based high-speed high-precision micro phased array doppler log includes a signal receiver 1, a signal transmitter 2, a digital processor 3 and a transducer 4.
The signal receiver mainly realizes the preprocessing work of receiving weak signals, including the program-controlled amplification and filtering processing of the signals, and designs and uses a precise signal conditioning circuit with low noise, high gain bandwidth product and large slew rate to achieve the effects of low noise and low distortion of a receiving channel so as to realize the high-precision and low-noise performance of measurement;
as shown in fig. 2, the signal receiver is an echo signal preprocessing unit, and includes a preamplifier circuit unit, a programmable amplifier unit, and a band-pass filter unit, which are connected in sequence; the preamplification unit is composed of a low-noise instrument amplifier and a phase-shifting network and is used for completing preamplification and beam forming of weak signals; the program control amplification unit is composed of a 4-order band-pass filter and a resistance attenuation network, and achieves noise suppression and gain program control functions; the band-pass filtering unit is composed of an 8-order band-pass filter and a differential amplifier, and achieves the functions of re-filtering of signals and single-end to differential output.
The signal transmitter is a driving unit for transmitting acoustic signals by the transducer, and comprises a power amplification circuit, wherein the power amplification circuit in the embodiment adopts a D-type push-pull power amplification design of a high-frequency MOS tube, can be superior to the realization of higher frequency bandwidth, is used for amplifying differential instruction signals, pushes a high-frequency power transformer to output, realizes boosting, and array element driving and impedance matching in multiple independent horizontal directions and vertical directions, and has the highest efficiency of more than 90%. Meanwhile, each path of signal adopts a high-speed current detection circuit, and the overcurrent and overvoltage protection is carried out by cycle-by-cycle detection, so that the reliability of the system can be greatly improved. In order to ensure the miniaturization of the design, an energy storage capacitor form is adopted, the flatness in the pulse width of the emission voltage can be ensured, the small-volume high-power pulse emission is completed, and the system volume can be effectively reduced to improve the performance. And the current-limiting charging is carried out during the idle time of the energy storage unit, so that the power requirement on a preceding power supply can be reduced.
The signal transmitter is used for driving the transducer device to send out an acoustic detection signal by amplifying the power of the excitation signal, and the signal transmitter adopts a high-performance and high-capacity energy storage capacitor technology, so that the effect of small space and high power is achieved, and the miniaturization performance of the system is realized;
the digital processor mainly implements algorithms such as system data preprocessing, orthogonal demodulation, beam forming and the like, adopts a high-speed DSP as a main control and arithmetic unit, adopts an FPGA for assisting in high-speed signal acquisition and preprocessing and generating an accurate controllable pulse width emission excitation signal, and implements the high speed and high efficiency of the system; the transducer is used as an acoustic device of a system, is mainly used for transmitting detection signals and receiving echo signals, and the system uses a transmitting-receiving combined transducer which is provided with a plurality of point vibration elements and controllable in transmitting direction.
The phased array Doppler log is cylindrical in appearance, convenient to install and fix, particularly has the characteristic of small volume, can be carried on various large, small and even miniature aircrafts, and has a very wide application range and application prospect.
The phased array Doppler log is simple to be externally connected with an interface, only an external power supply needs to be connected during use, communication is carried out between the phased array Doppler log and an external master control system through an external serial interface, the system is reserved for an external network port to carry out parameter setting and data recovery functions, and the interface adopts a watertight connector and has high reliability.
The phased array Doppler log can record original data and navigation data through an internal recording device; the stored data can be recycled through the network interface, and data analysis and fault diagnosis of the system are facilitated.
Claims (9)
1. A high-speed high-precision miniature phased array Doppler log is characterized by comprising a signal receiver, a signal transmitter, a digital processor and a transducer, wherein the signal receiver, the signal transmitter and the digital processor are arranged in a cavity of a shell; the signal receiver and the signal transmitter are respectively connected with the digital processor;
the transducer is an acoustic signal transmitting and receiving device with controllable transmitting direction;
the signal receiver is an echo signal preprocessing unit and comprises a preamplifier circuit unit, a program-controlled amplifier circuit and a band-pass filter circuit which are connected in sequence;
the signal transmitter is a driving unit for transmitting an acoustic signal by a transducer and comprises a power amplifying circuit;
the digital processor is used for providing excitation signals for the signal transmitter and receiving and collecting data preprocessed by the signal receiver.
2. The doppler log of claim 1, wherein said digital processor comprises a master DSP unit, an FPGA unit as a secondary controller, and a memory unit connected to the master DSP unit.
3. The doppler log of claim 1, wherein the digital processor includes a master DSP unit for resolving navigation data based on the collected signal data pre-processed by the signal receiver and an FPGA unit for controlling the generation of excitation signals for the signal transmitter based on DSP control instructions.
4. The doppler log of claim 1, wherein the digital processor further comprises a memory unit for storing the acquired signal receiver pre-processed signal data and the resolved navigation data.
5. The doppler log of claim 1, wherein said digital processor further comprises a data acquisition a/D differential channel for connection to a signal receiver.
6. The doppler log of claim 1, wherein the signal receiver, the signal transmitter, and the digital processor are mounted on three circuit boards in a stacked assembly within the housing cavity.
7. The doppler log of claim 1, wherein the housing cavity is a cylindrical housing cavity.
8. The doppler log of claim 1, wherein the pre-amplification unit comprises a low noise instrumentation amplifier and a phase shifting network, and performs pre-amplification and beam forming of weak signals; the program control amplification unit consists of a 4-order band-pass filter and a resistance attenuation network, and realizes the functions of noise suppression and gain program control; the band-pass filtering unit consists of an 8-order band-pass filter and a differential amplifier, and realizes the functions of re-filtering of signals and single-end to differential output.
9. The doppler log of claim 1, wherein the power amplifier circuit is a class D push-pull power amplifier circuit with high frequency MOS transistors.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920795623.0U CN211878181U (en) | 2019-05-29 | 2019-05-29 | High-speed high-precision miniature phased array Doppler log |
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| CN201920795623.0U CN211878181U (en) | 2019-05-29 | 2019-05-29 | High-speed high-precision miniature phased array Doppler log |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253283A (en) * | 2021-06-24 | 2021-08-13 | 中国船舶重工集团公司第七0七研究所九江分部 | Universal system suitable for acoustic Doppler velocity measurement |
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2019
- 2019-05-29 CN CN201920795623.0U patent/CN211878181U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253283A (en) * | 2021-06-24 | 2021-08-13 | 中国船舶重工集团公司第七0七研究所九江分部 | Universal system suitable for acoustic Doppler velocity measurement |
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