CN201463853U - Variable frequency digital depth sounder - Google Patents
Variable frequency digital depth sounder Download PDFInfo
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- CN201463853U CN201463853U CN2009200576947U CN200920057694U CN201463853U CN 201463853 U CN201463853 U CN 201463853U CN 2009200576947 U CN2009200576947 U CN 2009200576947U CN 200920057694 U CN200920057694 U CN 200920057694U CN 201463853 U CN201463853 U CN 201463853U
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Abstract
The utility model discloses a variable frequency digital depth sounder, which comprises a network input and output module and a digital signal processor. The network input and output module is connected with the command input end of the digital signal processor, the first output end of the digital signal processor is connected in sequence with a direct waveform generator, a transmission pulse width controller, a transmission driving circuit, a transducer, an echo reception operational amplifier and a frequency mixer, the second output end of the digital signal processor is connected in sequence with a time variable gain control circuit and a variable gain amplifier; the output end of the direct waveform generator is directly connected with the input end of the frequency mixer; the output end of the frequency mixer is connected in sequence with a band pass filter, the variable gain amplifier, a bilateral detection circuit, a low-pass filter circuit and the data input end of the digital signal processor. The utility model adopts the direct digital emission wave frequency generation technology, the advanced frequency mixing technology and the multiplication bilateral detection technology, realizes the control and flexible adjustment of the emission wave frequency through software, and improves the detection sensitivity.
Description
Technical field
The utility model relates to electron detection instrument field, relates in particular to a kind of variable-frequency instrument that fathoms.
Background technology
Present sounder all is to form the emitted frequency oscillatory circuit with inductance capacitance, and the emitted frequency of generation is regulated by the physical parameter of circuit component and determined the little and out of true of range of adjustment; Circuit that receive to survey echo then is that the oscillation frequency according to radiating circuit designs, the pass-band performance of circuit is the bandpass filtering amplifying circuit, can only be by fixing narrow band width, the gain-adjusted majority of circuit is to cooperate with variable gain amplifier or with amplifier, analog switch and electric resistance array to form; Detecting circuit is then most all to be with the monolateral detecting circuit of simple diode, and the signal after the detection send by microprocessor or special digital to analog converter sample quantization again.
Adopt the sounder of said structure, the simple designs structure of radiating circuit and receiving circuit makes it can only use the emission/receiving transducer of a certain fixed frequency, can not effectively handle by frequency changer circuit for the echo that the different frequency transmitted wave produces, cause the signal Processing noise jamming big, reduced the detection sensitivity of sounder.
Summary of the invention
For overcoming the deficiencies in the prior art, the utility model provides a kind of variable ratio frequency changer numeral sounder, energy flexible emitted frequency, and improved the sensitivity of surveying.
The utility model embodiment provides a kind of variable ratio frequency changer numeral sounder, comprise: the command input end of network input/output module linking number word signal processor, first output terminal of described digital signal processor connect direct waveform maker, emission pulse width controller, emission driving circuit, transducer, echo reception operational amplifier, frequency mixer successively, and the tie-time changes gain control circuit, variable gain amplifier to second output terminal of described digital signal processor successively; The output terminal of described direct waveform maker also directly connects described frequency mixer input end; The output terminal of described frequency mixer is the data input pin of connecting band bandpass filter, described variable gain amplifier, bilateral detecting circuit, low-pass filter circuit, described digital signal processor successively.
The process of above-mentioned sounder each several part processing of circuit signal is: described digital signal processor receives the depth measurement order that controlling computer is sent, control described direct waveform maker and produce transmitted wave, control simple harmonic quantity waveform higher of described direct waveform maker generation simultaneously and send described frequency mixer to than emitted frequency through amplifying the described transducer of driving rear drive; The echo that collects from described transducer receives the operational amplifier processing through described echo, in described frequency mixer, mix the signal wave that becomes a fixed carrier frequency with described simple harmonic quantity waveform, the signal wave of described fixed frequency is delivered to described variable gain amplifier and is handled after filtering, after bilateral detection and filtering, be sent to controlling computer again and handle, obtain the echo depth value by described digital signal processor.
Further, above-mentioned sounder also comprises the emission power controller, the input end linking number word signal processor of described emission power controller, and output terminal connects described emission driving circuit.
Further, described direct waveform maker is revised the emitted frequency of generation by the software setting of coupling.
Further, the echo of described different frequency transmitted wave generation mixes the signal wave that becomes a fixed carrier frequency with described simple harmonic quantity waveform in described frequency mixer.
Further, the frequency range of described simple harmonic wave is 555KHz-1205KHz; The frequency range of the signal wave of described fixed carrier frequency is 400KHz-500KHz.
Sounder of the present utility model has adopted Direct Digital emitted frequency generation technique, advanced frequency mixing technique and the bilateral detection technology of multiplication.Direct Digital emitted frequency generation technique can be revised adjustment by software setting with the emitted frequency of sounder, and generation can adapt to the transmitted wave of different frequency transducer.Advanced frequency mixing technique can be so that the echoed signal that different emitted frequency produces can both be converted to the signal wave of a fixed carrier frequency, whole like this sounder channel circuit also just can be handled the echoed signal of different frequency, its mixting circuit processing signals is effective, noise jamming is few, allows instrument can mate the transducer that connects different frequency at any time.Described sounder further adopts the bilateral detection technology of multiplication, can improve the sensitivity of surveying receiving circuit greatly.
Description of drawings
Fig. 1 is the sounder structural representation that the utility model embodiment provides;
Fig. 2 is the sounder workflow synoptic diagram that the utility model embodiment provides.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model embodiment provides a kind of variable ratio frequency changer numeral sounder, it comprises: the network input/output module, be that the command input end of network card chip 1 connection digital signal (DSP) processor 2, first output terminal of described digital signal processor 2 connect direct waveform maker (DDS) 3, emission pulse width controller 4, emission driving circuit 5, transducer 6, echo reception operational amplifier 7, frequency mixer 8 successively, the tie-time changes gain control circuit 13, variable gain amplifier 10 to second output terminal of described digital signal processor successively; The output terminal of described direct waveform maker also directly connects described frequency mixer 8 input ends; The output terminal of described frequency mixer is the data input pin of connecting band bandpass filter 9, described variable gain amplifier 10, bilateral detecting circuit 11, low-pass filter circuit 12, described digital signal processor 2 successively.
As a kind of embodiment, above-mentioned sounder also comprises emission power controller 14, the input end linking number word signal processor 2 of described emission power controller 14, and output terminal connects described emission driving circuit 5.
As shown in Figure 2, the workflow of described sounder is as follows:
The Industry Control computer 15 that the depth measurement Control Software is installed passes through the LAN port transmission depth measurement order of sounder network card chip 1 to digital signal (DSP) processor 2, digital signal processor 2 according to contained information in the order (such as: information such as range, transmission frequency, emission pulsewidth, yield value, threshold) the direct waveform maker 3 of control produces emitted frequencies, handles and emission driving circuit 5 amplifies and drives rear drive transducers 6 through emission pulse width controller 4; Direct waveform maker 3 just begins to generate a simple harmonic quantity waveform than the high 455KHz of emitted frequency and gives frequency mixer 8 after the emission pulse-width controlled is finished.Described digital signal processor 2 also changes gain control circuit 13 by the DA port tie-time, and the control time changes gain control circuit generated time change in gain (TVG) curve and sends variable gain amplifier 10 to, carries out the TVG control and treatment.
Become faint electric signal after echo process transducer 6 conversion of surveying, just deliver to 8 li simple harmonic wave signals of bringing with direct waveform maker of frequency mixer behind elder generation's process one-level echo reception operational amplifier 7 and do to subtract processing frequently than the high 455KHz of echoed signal frequency, the signal wave that it is 455KHz that the echoed signal of different frequency is just unified to become a fixed carrier frequency, ceramic band-pass filter 9 and operational amplification circuit that the signal wave of 455KHz after the process frequency mixer is handled is 455KHz by a centre frequency again, filtered signal amplifies and Filtering Processing through two-stage variable gain amplifier 10 again, make echoed signal obtain the suitable waveform of amplitude, at last through delivering to the AD analog to digital conversion input end of digital signal (DSP) processor 2 after bilateral detection and the low-pass filtering, through the quantification of digital signal (DSP) processor 2 and the coding back LAN port by network card chip 1 Wave data is sent to Industry Control computer 15, the adapting software in the Industry Control computer by decoding with calculate after obtain the echo depth value and show.
Need to prove that the frequency range of simple harmonic wave described in the foregoing description is 555KHz-1205KHz; The frequency range of the signal wave of described fixed carrier frequency is 400KHz-500KHz.Getting 655KHz simple harmonic wave and 455KHz signal wave is a kind of embodiment, also desirable other numerical value of frequency, and this can not limit the protection domain that adopts frequency mixing technique in the right of the utility model.
The utility model embodiment is by the software setting in the digital signal processor being revised the emitted frequency of adjusting sounder, and is more convenient to operate, accurate, saved the circuit manufacturing cost.The employing frequency mixing technique can be so that the echoed signal that different emitted frequency produces can both be converted to the signal wave of a fixed carrier frequency, whole like this sounder channel circuit also just can be handled the echoed signal of different frequency, its mixting circuit processing signals is effective, noise jamming is few, allows instrument can mate the transducer that connects different frequency at any time.Described sounder further adopts the bilateral detection technology of multiplication, can improve the sensitivity of surveying receiving circuit greatly.
The above is a preferred implementation of the present utility model; certainly can not limit the interest field of the utility model with this; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement and change, these improvement and change also are considered as protection domain of the present utility model.
Claims (5)
1. variable ratio frequency changer numeral sounder, it is characterized in that, comprise: the command input end of network input/output module linking number word signal processor, first output terminal of described digital signal processor connect direct waveform maker, emission pulse width controller, emission driving circuit, transducer, echo reception operational amplifier, frequency mixer successively, and the tie-time changes gain control circuit, variable gain amplifier to second output terminal of described digital signal processor successively; The output terminal of described direct waveform maker also directly connects the input end of described frequency mixer; The output terminal of described frequency mixer is the data input pin of connecting band bandpass filter, described variable gain amplifier, bilateral detecting circuit, described digital signal processor successively.
2. variable ratio frequency changer numeral sounder according to claim 1 is characterized in that, also comprises the emission power controller, the input end linking number word signal processor of described emission power controller, and output terminal connects described emission driving circuit.
3. variable ratio frequency changer numeral sounder according to claim 1 and 2 is characterized in that described direct waveform maker is revised the emitted frequency of generation by the software setting of coupling.
4. variable ratio frequency changer numeral sounder according to claim 1 is characterized in that the frequency range of described simple harmonic wave is 555KHz-1205KHz; The frequency range of the signal wave of fixed carrier frequency is 400KHz-500KHz in the described frequency mixer.
5. variable ratio frequency changer numeral sounder according to claim 4 is characterized in that described simple harmonic quantity wave frequency is 655KHz; The signal wave frequency of described fixed carrier frequency is 455KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200576947U CN201463853U (en) | 2009-06-02 | 2009-06-02 | Variable frequency digital depth sounder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200576947U CN201463853U (en) | 2009-06-02 | 2009-06-02 | Variable frequency digital depth sounder |
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| Publication Number | Publication Date |
|---|---|
| CN201463853U true CN201463853U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200576947U Expired - Fee Related CN201463853U (en) | 2009-06-02 | 2009-06-02 | Variable frequency digital depth sounder |
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| CN (1) | CN201463853U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237891A (en) * | 2014-09-23 | 2014-12-24 | 中国科学院声学研究所 | Multi-frequency sounding device and method |
| CN105607066A (en) * | 2015-12-18 | 2016-05-25 | 上海华测导航技术股份有限公司 | Multi-frequency point single transducer sonar water depth measuring system and measuring method |
-
2009
- 2009-06-02 CN CN2009200576947U patent/CN201463853U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237891A (en) * | 2014-09-23 | 2014-12-24 | 中国科学院声学研究所 | Multi-frequency sounding device and method |
| CN104237891B (en) * | 2014-09-23 | 2017-01-25 | 中国科学院声学研究所 | Multi-frequency sounding device and method |
| CN105607066A (en) * | 2015-12-18 | 2016-05-25 | 上海华测导航技术股份有限公司 | Multi-frequency point single transducer sonar water depth measuring system and measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20170602 |