CN104237891A - Multi-frequency sounding device and method - Google Patents
Multi-frequency sounding device and method Download PDFInfo
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- CN104237891A CN104237891A CN201410490179.3A CN201410490179A CN104237891A CN 104237891 A CN104237891 A CN 104237891A CN 201410490179 A CN201410490179 A CN 201410490179A CN 104237891 A CN104237891 A CN 104237891A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
- G01S15/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
- G01C13/008—Surveying specially adapted to open water, e.g. sea, lake, river or canal measuring depth of open water
Abstract
The invention relates to a multi-frequency sounding device. The multi-frequency sounding device comprises a transducer probe, a control display module, a transducer driving module, a data acquisition module and an echo signal processing module, wherein the transducer driving module is controlled by the control display module to drive the transducer probe to emit an amplitude-modulated signal, the amplitude-modulated signal can be demodulated into a low-frequency signal with the frequency twice that of an envelope signal in the amplitude-modulated signal in the transmission process, and the low-frequency signal and the original amplitude-modulated signal with the frequency unchanged reach the water bottom and then are reflected to generate echo signals; the low-frequency signal can be transmitted at the water bottom and is reflected after encountering another layer of medium interface to generate an echo signal; the reflected echo signals can be received by the transducer probe and then transmitted to the echo signal processing module through the data acquisition module, and the sounding result is calculated after the echo signals are filtered and amplified by the echo signal processing module.
Description
Technical field
The present invention relates to bathymetric survey field, particularly a kind of device and method of MULTIFREQUENCY SOUNDING.
Background technology
Carry out the thickness that target that water-bed correlation study research and engineering construction primarily measure is exactly water depth and benthal deposit, and acoustic method is bathymetric survey method the most effective and general.The principle utilizing acoustic method to sound the depth of the water launches acoustical signal downwards for utilizing underwater acoustic transducer, acoustical signal is propagated and is run into the bottom and then reflect in aqueous medium, receive reflected signal, utilize and to transmit and mistiming between the reflected signal that receives calculates the depth of water.
Sounder used at present mainly contains two kinds of mode of operations from frequency of operation point: single-frequency and double frequency.It is single frequency or the signal launching two frequencies that so-called single-frequency depth sounder or dual frequency sounder refer to the acoustical signal of launching to water body.The reason of dual frequency sounder is used to mainly contain 2 points: the application 1, in the ocean depth observation in marine site, deep-sea.Because measuring accuracy when high frequency sound wave is used for depth survey is higher, but the simultaneously decay of acoustic wave energy in the seawater in unit distance is also than comparatively fast.So, when ocean depth is deep, often measure less than seabed with high frequency sound wave, need to reduce frequency of operation for this reason, can implement to measure to deep marine site, thus be provided with low frequency operating frequency.2, the application in the observation of navigation channel.The degree of depth in navigation channel can shoal due to the deposition of mud and affect Navigation capacity, often needs the Navigation capacity being maintained navigation channel by measures such as desiltings.So will detect the fouling status of the mud in river course.And high frequency sound wave is difficult to penetrate mud, low-frequency sound wave then penetrates mud than being easier to.This characteristic of positive good utilisation measures the thickness of alluvial, instructs desilting work.
The signal that dual frequency sounder is launched is generally one high and one low two kinds of frequencies, is to be sent by two different transducers.And have now some products to be nominally frequency conversion sounder, there is multi-frequency available, but the transmitting of different frequency signals is realized indeed through the different transducer of replacing, this working method is concerning in fact still one high and one low two frequencies a set of equipment, user needs to configure and changes the replacing that different sensors could realize frequency of operation, operating difficulties, cost is high.In addition, the frequency transmitted is lower, then corresponding transducer dimensions is larger, therefore traditional low frequency sounder or dual frequency sounder size all larger, inconvenience has been installed in use.
Summary of the invention
The object of the invention is to overcome the defects such as the cost that MULTIFREQUENCY SOUNDING device of the prior art needs multiple transducer to cause is high, operation inconvenience, thus a kind of MULTIFREQUENCY SOUNDING device with low cost, easy and simple to handle is provided.
To achieve these goals, the invention provides a kind of device of MULTIFREQUENCY SOUNDING, comprising: transducer probe 1, control display module 3, transducer drive module 5, data acquisition module 6 and echo signal processing module 7; Wherein,
Described transducer drive module 5 drives described transducer probe 1 to launch an amplitude-modulated signal under the control of described control display module 3, this amplitude-modulated signal can demodulate the low frequency signal that frequency is the envelope signal frequency twice in amplitude-modulated signal in communication process, this low frequency signal and the constant original amplitude modulated signal of frequency arrive underwater reflection, generate echoed signal; Can also there is transmission at the bottom in this low frequency signal, reflect when running into another layer of medium interface again, generates echoed signal; Echoed signal after reflection is received by transducer probe 1, then is transferred to described echo signal processing module 7 through data acquisition module 6, and described echo signal processing module 7 pairs of echoed signals calculate depth measurement result after doing filtering, amplification.
In technique scheme, the signal that described transducer probe 1 is launched is the pulse signal with one fixed width, and its peak power is greater than 3000 watts.
In technique scheme, described control display module 3 is selected the signal that will launch, and described selection comprises: the shape determining the envelope signal in the amplitude-modulated signal that will launch.
In technique scheme, described control display module 3 is selected also to comprise to the signal that will launch: adjustment signal gain.
In technique scheme, the echoed signal that described echo signal processing module 7 arranges the constant original amplitude modulated signal of echoed signal that different passages is low frequency signal, frequency does filtering and amplification.
The MULTIFREQUENCY SOUNDING method that the device that present invention also offers the MULTIFREQUENCY SOUNDING described in employing realizes, comprising:
Step 1), the first amplitude-modulated signal 10 is transmitted into by transducer probe 1 and changes the low frequency signal 11 that the second amplitude-modulated signal 12 that but amplitude the same with described first amplitude-modulated signal 10 frequency diminish and frequency are the envelope frequency twice of the first amplitude-modulated signal 10 after in aqueous medium into;
Step 2), the second amplitude-modulated signal 12 of constantly diminishing of the low frequency signal 11 that demodulates and energy runs into the bottom and can reflect in communication process;
Step 3), transducer probe 1 receives low frequency signal 11 and runs into the low frequency echoed signal 13 that underwater reflection generates, and the second amplitude-modulated signal 12 runs into the high frequency echo signal 14 that underwater reflection generates, and then calculates the water-bed degree of depth time of arrival according to echo.
In technique scheme, also comprise:
Step 4), low frequency signal 11 the bottom occur transmission, reflect when running into another layer of medium interface, transducer probe 1 receives reflection echo again, according to the degree of depth at echo calculation medium time of arrival interface.
The invention has the advantages that:
MULTIFREQUENCY SOUNDING device of the present invention by the water-bed degree of depth of the signal measurement of multi-frequency, can have adaptability widely under the prerequisite without the need to converting transducer, and with low cost, easy and simple to handle.
Accompanying drawing explanation
Fig. 1 is the annexation figure of MULTIFREQUENCY SOUNDING device of the present invention;
Fig. 2 is the functional schematic of MULTIFREQUENCY SOUNDING device of the present invention;
Fig. 3 is the signal communication process schematic diagram in MULTIFREQUENCY SOUNDING method of the present invention.
Drawing explanation
1 transducer probe 2 waterproof case
3 control display module 4 sealing adaptor
5 transducer drive module 6 data acquisition modules
7 echo signal processing module 8 communication modules
9 watertight cable 10 amplitude-modulated signals
11 low frequency signal 12 amplitude-modulated signals
13 low frequency echoed signal 14 high frequency echo signals
15 carrier signal 16 envelope signals
Embodiment
Now the invention will be further described by reference to the accompanying drawings.
MULTIFREQUENCY SOUNDING side of the present invention ratio juris is: launch a high-power amplitude-modulated signal to the bottom, because nonlinear effect can demodulate the low frequency signal that frequency is envelope signal frequency twice in amplitude-modulated signal when this amplitude-modulated signal is propagated in media as well; Original transmitted signal and low frequency signal meet underwater reflection, receive these echoed signals and can analyze the water-bed degree of depth; Low frequency signal also has stronger penetration capacity, can measure other medium aspects under the bottom.Low frequency signal has stronger penetration capacity, can propagate comparatively at a distance, and original emission signal frequency is high, and measuring accuracy is high, and both are complementary, can adapt to multiple measurement environment.In addition, low frequency signal that the frequency by changing envelope signal in amplitude-modulated signal in different measurement environment obtains different frequency, that can meet measuring condition, further increases the scope of application of the inventive method.
Below in conjunction with accompanying drawing, the present invention is elaborated.
With reference to figure 1 and Fig. 2, MULTIFREQUENCY SOUNDING device of the present invention comprises: transducer probe 1, waterproof case 2, control display module 3, transducer drive module 5, data acquisition module 6, echo signal processing module 7 and communication module 8; Wherein, described transducer probe 1 is by sealing adaptor 4 and the seamless mechanical connection of waterproof case 2; Described transducer drive module 5, data acquisition module 6, echo signal processing module 7 and communication module 8 are all positioned at described waterproof case 2; Described transducer probe 1 is electrically connected with transducer drive module 5, data acquisition module 6, described transducer drive module 5 is also electrically connected with communication module 8, data acquisition module 6 is also electrically connected with echo signal processing module 7, echo signal processing module 7 is also electrically connected with communication module 8, and described communication module 8 is electrically connected with control display module 3 by watertight cable 9.
Below the various piece in MULTIFREQUENCY SOUNDING device is described further.
Described transducer probe 1 is for transmitting and receiving echoed signal.The amplitude-modulated signal that transducer probe 1 is launched is the pulse signal with one fixed width, and its peak power is greater than 3000 watts, and AB class works can be used to realize high-power signal.See Fig. 3, the amplitude-modulated signal launched of transducer probe 1 to be multiplied with envelope signal 16 by carrier signal 15 and to obtain, the frequency of envelope signal is relevant with the environment that will detect, frequency is higher, measurement result is more accurate, but range is less, contrary, frequency is lower, the precision of measurement result is lower, but range is larger, penetration capacity is stronger.Therefore, when measuring, can according to the environment determination transducer probe 1 that will detect the frequency of the middle envelope signal that transmits.
Described control display module 3 is for providing interface to user, and user selects the signal that will launch by control display module 3.User comprises the selection that will transmit: determine the shape (shape of the envelope signal in the amplitude-modulated signal namely launched) transmitted.As the optional implementation of one, in another embodiment, the selection of user to the signal that will launch also comprises: adjustment signal gain.In addition, control display module 3 and can also show to user the testing result that echo signal processing module 7 calculates.
The information that described communication module 8 sends for receiving described control display module 3, and send firing order and the waveform that transmits to described transducer drive module 5; The depth measurement result that echo signal processing module 7 generates also sends to and controls display module 3 by communication module 8.
Described transducer drive module 5 transmits for driving transducer probe 1.
Described data acquisition module 6 is converted to digital signal for the echoed signal received by transducer probe 1.
Described echo signal processing module 7 is carried out corresponding filtering according to the working method (high frequency, low frequency or double frequency) of the different passages controlled set by display module 3 to signal, is amplified process, obtains testing result.Likely there is high-frequency signal and low frequency signal in the signal received by described transducer probe 1, in echo signal processing module 7, therefore adopt different treatment channel to carry out filtering to echoed signal simultaneously.Such as, adopt hf channel to filter out high-frequency signal from echoed signal, specifically, this hf channel carries out filtering by the logical bandpass filter of scope within the scope of high-frequency signal of band to echoed signal, thus obtains high-frequency signal.Similar, adopt low channel to filter out low frequency signal from echoed signal, specifically, this low channel carries out filtering by the logical bandpass filter of scope within the scope of low frequency signal of band to echoed signal, thus obtains low frequency signal.Because the receiving sensitivity of transducer probe 1 pair of high-frequency signal and low frequency signal is different, the receiving sensitivity of high-frequency signal is stronger, the receiving sensitivity of low frequency signal is more weak, therefore when doing amplification process, the multiple that hf channel in echo signal processing module 7 and low channel amplify two kinds of signals is also different, and the enlargement factor of high-frequency signal is less, generally between 40-100 decibel, and the enlargement factor of low frequency signal is comparatively large, generally need to reach between 100-160 decibel.Echo signal processing module 7 by filtering, amplify after high frequency echo signal or time of arrival of low frequency echoed signal, the water-bed degree of depth can be calculated.
With reference to figure 3, method of the present invention comprises the following steps:
Step 1), amplitude-modulated signal 10 is transmitted in aqueous medium by transducer probe 1, due to aqueous medium attenuation by absorption, the energy of amplitude-modulated signal 10 can increase along with propagation distance and diminish, and changes the amplitude-modulated signal 12 that but amplitude the same with amplitude-modulated signal frequency diminishes into.Simultaneously due to nonlinear effect, amplitude-modulated signal 12 can demodulate the low frequency signal 11 that frequency is envelope frequency twice, and the energy of low frequency signal 11 is less, but due to the continuous demodulation of former amplitude-modulated signal, low frequency signal 11 energy builds up within the specific limits and becomes large.
Step 2), the amplitude-modulated signal 12 that constantly diminishes of the low frequency signal 11 that demodulates and energy runs into the bottom and can reflect in communication process.
Step 3), transducer probe 1 receives low frequency signal 11 and runs into the low frequency echoed signal 13 that underwater reflection generates, and amplitude-modulated signal 12 runs into the high frequency echo signal 14 that underwater reflection generates, and then calculates the water-bed degree of depth time of arrival according to echo.In this step, transducer probe 1 can receive low frequency echoed signal 13, high frequency echo signal 14 simultaneously, when calculating the water-bed degree of depth time of arrival according to echo, wherein any one echo can be adopted to calculate the water-bed degree of depth, comparatively speaking, the measuring accuracy of high frequency echo signal 14 is higher.
Step 4), low frequency signal 11 the bottom occur transmission, reflect when running into another layer of medium interface, transducer probe 1 receives reflection echo again, according to the degree of depth at echo calculation medium time of arrival interface.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (7)
1. the device of a MULTIFREQUENCY SOUNDING, it is characterized in that, comprising: transducer probe (1), control display module (3), transducer drive module (5), data acquisition module (6) and echo signal processing module (7); Wherein,
Described transducer drive module (5) drives described transducer probe (1) to launch an amplitude-modulated signal under the control of described control display module (3), this amplitude-modulated signal can demodulate the low frequency signal that frequency is the envelope signal frequency twice in amplitude-modulated signal in communication process, this low frequency signal and the constant original amplitude modulated signal of frequency arrive underwater reflection, generate echoed signal; Can also there is transmission at the bottom in this low frequency signal, reflect when running into another layer of medium interface again, generates echoed signal; Echoed signal after reflection is received by transducer probe (1), described echo signal processing module (7) is transferred to again through data acquisition module (6), described echo signal processing module (7) calculates depth measurement result after doing filtering, amplification to echoed signal.
2. the device of MULTIFREQUENCY SOUNDING according to claim 1, is characterized in that, the signal that described transducer probe (1) is launched is the pulse signal with one fixed width, and its peak power is greater than 3000 watts.
3. the device of MULTIFREQUENCY SOUNDING according to claim 1, is characterized in that, described control display module (3) is selected the signal that will launch, and described selection comprises: the shape determining the envelope signal in the amplitude-modulated signal that will launch.
4. the device of MULTIFREQUENCY SOUNDING according to claim 3, is characterized in that, described control display module (3) is selected also to comprise to the signal that will launch: adjustment signal gain.
5. the device of MULTIFREQUENCY SOUNDING according to claim 1, it is characterized in that, the echoed signal that described echo signal processing module (7) arranges the constant original amplitude modulated signal of echoed signal that different passages is low frequency signal, frequency does filtering and amplification.
6. the MULTIFREQUENCY SOUNDING method adopting the device of the described MULTIFREQUENCY SOUNDING of one of claim 1-5 to realize, comprising:
Step 1), the first amplitude-modulated signal (10) is transmitted into by transducer probe (1) and changes the low frequency signal (11) that the second amplitude-modulated signal (12) that but amplitude the same with described first amplitude-modulated signal (10) frequency diminish and frequency are the envelope frequency twice of the first amplitude-modulated signal (10) after in aqueous medium into;
Step 2), the second amplitude-modulated signal (12) of constantly diminishing of the low frequency signal (11) that demodulates and energy runs into the bottom and can reflect in communication process;
Step 3), transducer probe (1) receives low frequency signal (11) and runs into the low frequency echoed signal (13) that underwater reflection generates, and second amplitude-modulated signal (12) run into the high frequency echo signal (14) that underwater reflection generates, and then calculate the water-bed degree of depth time of arrival according to echo.
7. MULTIFREQUENCY SOUNDING method according to claim 6, is characterized in that, also comprise:
Step 4), low frequency signal (11) the bottom occur transmission, reflect again when running into another layer of medium interface, transducer probe (1) receive reflection echo, according to the degree of depth at echo calculation medium time of arrival interface.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004880A (en) * | 2015-07-06 | 2015-10-28 | 杭州水进环境科技有限公司 | ADCP flow velocity measuring system employing high-order harmonic components |
| CN107290744A (en) * | 2016-04-11 | 2017-10-24 | 大连中睿科技发展有限公司 | Ice thickness depth of water comprehensive survey radar system and method |
| CN108303357A (en) * | 2018-01-29 | 2018-07-20 | 杭州开闳环境科技有限公司 | Suspended load measuring system and signal processing method based on multifrequency underwater sound signal |
| CN108627839A (en) * | 2017-03-16 | 2018-10-09 | 中国科学院声学研究所 | A kind of object detection method and device based on sound wave Gao Gengxin rate emission mode |
| CN110219641A (en) * | 2019-05-27 | 2019-09-10 | 承德石油高等专科学校 | A kind of well liquid face test device and its test method |
| CN110494718A (en) * | 2017-03-16 | 2019-11-22 | 罗斯蒙特测量有限公司 | Improvement or improvement related with vibrating element apparatus in vibrating element apparatus |
| CN113447983A (en) * | 2021-06-23 | 2021-09-28 | 湖南国天电子科技有限公司 | Data acquisition and signal processing method of shallow stratum profiler |
| CN116840821A (en) * | 2023-09-01 | 2023-10-03 | 无锡市海鹰加科海洋技术有限责任公司 | Double-frequency sounding control system based on data analysis |
| CN117031477A (en) * | 2023-09-28 | 2023-11-10 | 北京海卓同创科技有限公司 | Automatic variable-frequency multi-beam sounding system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201463853U (en) * | 2009-06-02 | 2010-05-12 | 广州市中海达测绘仪器有限公司 | Variable frequency digital depth sounder |
| EP2317336A1 (en) * | 2009-10-28 | 2011-05-04 | Agency for Defence Development | Method for estimating target range error and sonar system thereof |
-
2014
- 2014-09-23 CN CN201410490179.3A patent/CN104237891B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201463853U (en) * | 2009-06-02 | 2010-05-12 | 广州市中海达测绘仪器有限公司 | Variable frequency digital depth sounder |
| EP2317336A1 (en) * | 2009-10-28 | 2011-05-04 | Agency for Defence Development | Method for estimating target range error and sonar system thereof |
Non-Patent Citations (4)
| Title |
|---|
| 张迎华: "双频数字测深仪信号处理软硬件设计与实现", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
| 李颂文: "参量阵及其在水声工程中的应用进展", 《声学技术》 * |
| 汪猛猛: "小型双频测深仪的设计与实现", 《中国优秀硕士论文全文数据库 工程科技II辑》 * |
| 陈钧等: "双频测深仪测深研究", 《海洋测绘》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004880A (en) * | 2015-07-06 | 2015-10-28 | 杭州水进环境科技有限公司 | ADCP flow velocity measuring system employing high-order harmonic components |
| CN105004880B (en) * | 2015-07-06 | 2017-12-29 | 杭州开闳环境科技有限公司 | A kind of ADCP flow velocity velocity-measuring systems using higher harmonic components |
| CN107290744A (en) * | 2016-04-11 | 2017-10-24 | 大连中睿科技发展有限公司 | Ice thickness depth of water comprehensive survey radar system and method |
| CN107290744B (en) * | 2016-04-11 | 2023-04-25 | 中国水利水电科学研究院 | Ice thickness water depth comprehensive detection radar system and method |
| CN110494718A (en) * | 2017-03-16 | 2019-11-22 | 罗斯蒙特测量有限公司 | Improvement or improvement related with vibrating element apparatus in vibrating element apparatus |
| CN108627839A (en) * | 2017-03-16 | 2018-10-09 | 中国科学院声学研究所 | A kind of object detection method and device based on sound wave Gao Gengxin rate emission mode |
| US11585681B2 (en) | 2017-03-16 | 2023-02-21 | Rosemount Measurement Limited | Vibrating element apparatus |
| CN108303357A (en) * | 2018-01-29 | 2018-07-20 | 杭州开闳环境科技有限公司 | Suspended load measuring system and signal processing method based on multifrequency underwater sound signal |
| CN110219641A (en) * | 2019-05-27 | 2019-09-10 | 承德石油高等专科学校 | A kind of well liquid face test device and its test method |
| CN113447983A (en) * | 2021-06-23 | 2021-09-28 | 湖南国天电子科技有限公司 | Data acquisition and signal processing method of shallow stratum profiler |
| CN116840821A (en) * | 2023-09-01 | 2023-10-03 | 无锡市海鹰加科海洋技术有限责任公司 | Double-frequency sounding control system based on data analysis |
| CN116840821B (en) * | 2023-09-01 | 2023-12-22 | 无锡市海鹰加科海洋技术有限责任公司 | Double-frequency sounding control system based on data analysis |
| CN117031477A (en) * | 2023-09-28 | 2023-11-10 | 北京海卓同创科技有限公司 | Automatic variable-frequency multi-beam sounding system and method |
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