CN108732252B - In-situ measuring transducer for acoustic characteristics of submarine sediment - Google Patents
In-situ measuring transducer for acoustic characteristics of submarine sediment Download PDFInfo
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- CN108732252B CN108732252B CN201810842140.1A CN201810842140A CN108732252B CN 108732252 B CN108732252 B CN 108732252B CN 201810842140 A CN201810842140 A CN 201810842140A CN 108732252 B CN108732252 B CN 108732252B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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Abstract
The invention discloses an in-situ measurement transducer for acoustic characteristics of a submarine sediment, which comprises a bearing shaft, a probe rod, a penetrating cone, watertight cables, binding posts, insulating terminals and wires, wherein a plurality of piezoelectric ceramic tubes are sleeved on the bearing shaft between the probe rod and the penetrating cone, an inner oil cavity is formed between the piezoelectric ceramic tubes and the bearing shaft, an outer oil cavity is formed between the piezoelectric ceramic tubes and an acoustic-permeable sealing sleeve, the piezoelectric ceramic tubes between two adjacent piezoelectric ceramic tubes and the end part of the piezoelectric ceramic tubes are fixed through a fixing assembly, and the fixing assembly is provided with oil holes for communicating the inner oil cavity with the outer oil cavity; the head end of the sound-transmitting sealing sleeve is provided with a head sealing assembly, the tail end of the sound-transmitting sealing sleeve is provided with a tail sealing assembly, the head sealing assembly and the tail sealing assembly seal the outer oil cavity and the inner oil cavity, and the tail sealing assembly comprises an oil filling hole and an oil filling hole sealing piece which are communicated with the outer oil cavity; a positioning ring is arranged between the tail sealing component and the penetration cone. The invention eliminates the influence of penetration resistance and high hydrostatic pressure on the piezoelectric ceramic tube, and improves the measurement accuracy.
Description
Technical Field
The invention relates to the technical field of submarine detection, in particular to an in-situ measuring transducer for acoustic characteristics of submarine sediments.
Background
The seabed is an important boundary of an underwater sound field, and acoustic characteristic parameters such as sound velocity and sound attenuation coefficient of a seabed sediment have important influence on the propagation rule of sound waves in the ocean. The investigation and research of the acoustic characteristics of the submarine sediments are important research contents of military oceanography and military geophysics, have important significance for national defense construction, and have important application values in the fields of ocean engineering investigation, submarine resource exploration and development, submarine environment monitoring and the like.
In-situ measurement of acoustic properties of a submarine sediment is to place an acoustic instrument on the seabed to directly measure the propagation properties of sound waves in the sediment, so that disturbance to the sediment caused by sampling and carrying is avoided, the surrounding environment is unchanged, and therefore, the measured sound velocity and sound attenuation coefficient are more accurate and reliable.
The in-situ measurement of the seabed has high requirements on the transducer, the transducer is required to have the characteristic of high hydrostatic pressure resistance, the ceramic tube is required to be prevented from being broken due to large penetration resistance when the transducer penetrates into sediment, and the influence of complicated seabed noise on the acoustic signal of the transducer is required to be eliminated. Foreign research on the submarine in-situ measurement transducer is earlier, but the influence of penetrating force on piezoelectric ceramics is not well solved, domestic research is still in a starting stage, and only the transducer is designed to resist high pressure. Therefore, how to solve the influence of penetration force on the piezoelectric ceramic tube in the transducer becomes a problem to be solved in the art.
Disclosure of Invention
The invention aims to provide an in-situ measuring transducer for acoustic characteristics of submarine sediments, so as to eliminate the influence of penetration force and high hydrostatic pressure on a piezoelectric ceramic tube in the transducer and improve the measuring precision of the transducer.
In order to achieve the above purpose, the invention provides an in-situ measuring transducer for acoustic characteristics of a submarine sediment, which comprises a bearing shaft, a probe rod fixedly connected to the head part of the bearing shaft and a penetration cone fixedly connected to the tail part of the bearing shaft; the bearing shaft is provided with a through hole communicated with the inner cavity, a binding post is arranged in the through hole, the binding post is wrapped and fixed in the through hole through an insulating terminal, two ends of the binding post are provided with wires, and one end of each wire is connected with the watertight cable;
a plurality of piezoelectric ceramic tubes are sleeved on a bearing shaft between the probe rod and the penetration cone, an inner oil cavity is formed between the piezoelectric ceramic tubes and the bearing shaft, an acoustic sealing sleeve is sleeved outside the piezoelectric ceramic tubes, an outer oil cavity is formed by the piezoelectric ceramic tubes and the acoustic sealing sleeve, two adjacent sections of piezoelectric ceramic tubes and the piezoelectric ceramic tubes at the end parts are fixed through fixing components arranged on the bearing shaft, and the fixing components are provided with oil holes for communicating the inner oil cavity with the outer oil cavity; the other end of the lead is electrically connected with the piezoelectric ceramic tube;
the head end of the sound-transmitting sealing sleeve is provided with a head sealing assembly, the tail end of the sound-transmitting sealing sleeve is provided with a tail sealing assembly, the head sealing assembly and the tail sealing assembly seal the outer oil cavity and the inner oil cavity, and the tail sealing assembly comprises an oil filling hole communicated with the outer oil cavity and an oil filling hole sealing piece used for sealing the oil filling hole; and a positioning ring is arranged between the tail sealing assembly and the penetration cone.
Optionally, the fixing component comprises a metal skeleton ring sleeved on the bearing shaft and two epoxy positioning rings sleeved on the metal skeleton ring; the inner surface of the metal framework ring is provided with a plurality of oil grooves, the middle part of the outer surface of the metal framework ring is provided with an annular convex edge, at least one end surface of the metal framework ring is provided with a threading groove, and the threading groove corresponds to the oil grooves; at least one section of surface of the epoxy positioning ring is provided with a threading oil through groove, the two epoxy positioning rings are respectively sleeved on the outer surfaces of the metal framework rings at the two sides of the annular convex edges, and the threading oil through groove corresponds to the threading groove and the oil through groove.
Optionally, the piezoelectric ceramic tubes are four, the number of the metal skeleton rings is five, the number of the epoxy positioning rings is eight, wherein the epoxy positioning rings comprise three metal skeleton rings positioned between two adjacent piezoelectric ceramic tubes, one metal skeleton ring positioned at the head part of each piezoelectric ceramic tube and one metal skeleton ring positioned at the tail part of each piezoelectric ceramic tube, two epoxy positioning rings are sleeved on each metal skeleton ring positioned between two adjacent piezoelectric ceramic tubes, one epoxy positioning ring is sleeved on each metal skeleton ring positioned at the head part of each piezoelectric ceramic tube and one metal skeleton ring positioned at the tail part of each piezoelectric ceramic tube, and the epoxy positioning rings are in contact with the end surfaces of the piezoelectric ceramic tubes; the four piezoelectric ceramic tubes are connected in series to form a transmitting transducer, or the four piezoelectric ceramic tubes are connected in parallel to form a receiving transducer.
Optionally, the header seal assembly includes a header seal sleeve that is vulcanized and connected with the sound-transmitting seal sleeve, a header seal member that is disposed between the header seal sleeve and the bearing shaft, and a first positioning groove that accommodates the header seal member is disposed on an outer surface of the bearing shaft.
Optionally, the probe rod is connected with the bearing shaft through screw thread fastening, and the probe rod with be equipped with the probe rod sealing member between the bearing shaft, the bearing shaft surface is equipped with the holding the second constant head tank of probe rod sealing member.
Optionally, the afterbody seal assembly include with the afterbody seal cover of sound-permeable seal cover sulphur connection, be located afterbody seal cover with bear the tail seal spare between the axle, and be located the afterbody of afterbody seal cover with bear the sealing rubber pad between the axle, just sealing rubber pad locates between the afterbody seal cover with the holding ring, the tail end of afterbody seal cover is equipped with the oil filler point, the oil filler point seal spare is including inserting locates sealing screw in the oil filler point, overlap in sealing screw's nail pole sealing washer, sealing screw's nail cap area is greater than the drill way of oil filler point, just the diameter of sealing washer the aperture of oil filler point is less than the nail cap diameter, the sealing washer is located the drill way tip of oil filler point with between the nail cap.
Optionally, a gap is provided between the positioning ring and the tail seal sleeve, and the head seal sleeve, the sound-transmitting seal sleeve and the tail seal sleeve slide in the gap range.
Optionally, the inner oil cavity and the outer oil cavity are filled with low-resistance oil.
Optionally, the cone tip opening angle of the penetration cone is 40 °.
Optionally, a gap between the through hole and the binding post is sealed by the insulated terminal.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention provides a method for measuring acoustic characteristics of a submarine sediment in situ, wherein an inner oil cavity and an outer oil cavity are formed on the inner side and the outer side of a piezoelectric ceramic tube of a transducer, an acoustic sealing sleeve is sleeved outside the piezoelectric ceramic tube, a head sealing assembly and a tail sealing assembly are respectively arranged at the head and the tail of the acoustic sealing sleeve, the piezoelectric ceramic tube is limited and sealed by the head sealing assembly, the acoustic sealing sleeve, the tail sealing assembly and a positioning ring, a sufficient gap is reserved between a penetration cone and the tail sealing assembly, the structural design ensures that the transducer is directly acted on a bearing shaft by the downward insertion reaction force of the penetration cone in the process of being inserted into the sediment, the piezoelectric ceramic tube is in an unstressed state, the reliability and the stability of the piezoelectric ceramic tube are ensured, the influence of penetration resistance on the piezoelectric ceramic tube is avoided, the piezoelectric ceramic tube keeps the balance of the inner pressure and the outer pressure under high hydrostatic pressure, the piezoelectric ceramic tube is prevented from being damaged by unidirectional stress, and the measuring precision of the transducer is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an axial cross-sectional view of an in situ measurement transducer for acoustic properties of a subsea sediment provided by an embodiment of the invention;
FIG. 2 is a radial cross-sectional view of an in situ measurement transducer for acoustic properties of a subsea sediment provided by an embodiment of the invention;
FIG. 3 is a diagram of an oil filler point structure of an in-situ measurement transducer for acoustic properties of a subsea sediment according to an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of a piezoelectric ceramic tube of an in situ measurement transducer for acoustic properties of a subsea sediment according to an embodiment of the present invention;
FIG. 5 is a perspective view of a metal skeleton ring provided by an embodiment of the present invention;
FIG. 6 is a perspective view of an epoxy retainer ring provided by an embodiment of the present invention;
fig. 7 is a schematic view of the structure of an insulated terminal and a binding post according to an embodiment of the present invention.
In the figure, a probe rod 1, a watertight cable 2, a probe rod sealing piece 3, a bearing shaft 4, a head sealing sleeve 5, an acoustic transmission sealing sleeve 6, an outer oil cavity 7, an inner oil cavity 8, a tail sealing sleeve 9, a positioning ring 10, a sealing rubber pad 11, a penetration cone 12, a sealing ring 13, a sealing screw 14, an oil filling hole 15, a tail sealing piece 16, a piezoelectric ceramic tube 17, an insulating terminal 18, a head sealing piece 19, an epoxy positioning ring 20, a metal framework ring 21, an oil through groove 22, a threading groove 23, a threading oil through groove 24, a binding post 25 and a lead 26.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide an in-situ measuring transducer for acoustic characteristics of submarine sediments, so as to eliminate the influence of penetration force and high hydrostatic pressure on a piezoelectric ceramic tube in the transducer and improve the measuring precision of the transducer.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 to 7, the in-situ measurement transducer for the submarine sediment provided by the embodiment comprises a probe rod 1, a watertight cable 2, a probe rod sealing piece 3, a bearing shaft 4, a head sealing sleeve 5, an acoustic transmission sealing sleeve 6, an outer oil cavity 7, an inner oil cavity 8, a tail sealing sleeve 9, a positioning ring 10, a sealing rubber pad 11, a penetration cone 12, a sealing ring 13, a sealing screw 14, an oil filling hole 15, a tail sealing piece 16, a piezoelectric ceramic tube 17, an insulating terminal 18, a head sealing piece 19, an epoxy positioning ring 20, a metal skeleton ring 21, an oil through groove 22, a threading groove 23, a threading oil through groove 24, a binding post 25 and a lead 26.
The probe rod 1 is fixedly connected to the head of the bearing shaft 4 through threads, the penetration cone 12 is fixedly connected to the tail of the bearing shaft 4 through threads, an inner cavity is formed in the head of the bearing shaft 4, a watertight cable 2 is connected to a port of the inner cavity, a plurality of through holes communicated with the inner cavity are further formed in the bearing shaft 4, binding posts 25 are arranged in the through holes, the binding posts 25 are wrapped and fixed in the through holes through insulating terminals 18, conducting wires 26 are arranged at two ends of the binding posts 25, and one end of each conducting wire 26 is connected with the watertight cable 2;
a plurality of piezoelectric ceramic tubes 17 are sleeved on the bearing shaft 4 between the probe rod 1 and the penetration cone 12, an inner oil cavity 8 is formed between the piezoelectric ceramic tubes 17 and the bearing shaft 4, an acoustic sealing sleeve 6 is sleeved outside the piezoelectric ceramic tubes 17, an outer oil cavity 7 is formed by the piezoelectric ceramic tubes 17 and the acoustic sealing sleeve 6, the piezoelectric ceramic tubes 17 between two adjacent sections and the end part of the piezoelectric ceramic tubes 17 are fixed through a fixing component arranged on the bearing shaft 4, and the fixing component is provided with an oil through hole for communicating the inner oil cavity 8 with the outer oil cavity 7; the other end of the lead 26 is electrically connected with the piezoelectric ceramic 17;
the head end of the sound-transmitting sealing sleeve 6 is provided with a head sealing assembly, the tail end of the sound-transmitting sealing sleeve 6 is provided with a tail sealing assembly, the head sealing assembly and the tail sealing assembly seal the outer oil cavity 7 and the inner oil cavity 8, and the tail sealing assembly comprises an oil filling hole 15 communicated with the outer oil cavity 7 and an oil filling hole sealing piece for sealing; a retaining ring 10 is provided between the tail seal assembly and the penetration cone 12.
The piezoelectric ceramic tube 17 of the embodiment is limited and sealed by the head sealing component, the sound-transmitting sealing sleeve 6, the tail sealing component and the positioning ring 10, and a sufficient gap is reserved between the penetration cone 12 and the tail sealing component, so that the downward insertion reaction force borne by the penetration cone 12 directly acts on the bearing shaft 4 in the process of downward insertion of the transducer into sediment, the piezoelectric ceramic tube 17 is in an unstressed state, the reliability and the stability of the piezoelectric ceramic tube 17 are ensured, the influence of the penetration force on the piezoelectric ceramic tube is avoided, and the measuring precision of the transducer is further improved.
As shown in fig. 4-6, the fixing component in this embodiment includes a metal skeleton ring 21 sleeved on the bearing shaft 4 and two epoxy positioning rings 20 sleeved on the metal skeleton ring 21; the inner surface of the metal framework ring 21 is provided with a plurality of oil grooves 22, the middle part of the outer surface of the metal framework ring 21 is provided with an annular convex edge, at least one end surface of the metal framework ring 21 is provided with a threading groove 23, and the threading groove 23 corresponds to the oil grooves 22 in position; at least one section of the epoxy positioning ring 20 is provided with a threading oil through groove 24, the two epoxy positioning rings 20 are respectively sleeved on the outer surfaces of the metal framework rings 21 on two sides of the annular convex edges, the threading oil through groove 24 corresponds to the threading groove 23 in position with the threading groove 22, and the oil through holes are formed by the threading oil through groove 24, the threading groove 23 and the oil through groove 22 which are mutually communicated.
As shown in fig. 1 and 4, in this embodiment, there are four piezoelectric ceramic tubes 17, five metal skeleton rings 21, and eight epoxy positioning rings 20, wherein the two epoxy positioning rings include 3 metal skeleton rings 21 located between two adjacent piezoelectric ceramic tubes 17, one metal skeleton ring 21 located at the front of the piezoelectric ceramic tube 17 and one metal skeleton ring 21 located at the tail of the piezoelectric ceramic tube 17, two epoxy positioning rings 20 are sleeved on each metal skeleton ring 21 located between two adjacent piezoelectric ceramic tubes 17, one epoxy positioning ring 20 is sleeved on each metal skeleton ring 21 located at the front of the piezoelectric ceramic tube 17 and one epoxy positioning ring 20 is sleeved on each metal skeleton ring 21 located at the tail of the piezoelectric ceramic tube 17, and the epoxy positioning rings 0 are in contact with the end surfaces of the piezoelectric ceramic tubes 17; the four piezoelectric ceramic tubes 17 are connected in series to form a transmitting transducer, or the four piezoelectric ceramic tubes 17 are connected in parallel to form a receiving transducer. For a transmitting transducer, 4 piezoceramic tubes 17 are connected together in series to increase its transmit voltage response; for the receiving transducer, 4 piezoelectric ceramic tubes 17 are connected in parallel, so that the receiving sensitivity of the receiving transducer is improved; the piezoelectric ceramic tubes 17 are axially arranged inside the transducer along the transducer and vibrate along the radial direction of the transducer; the epoxy positioning ring 20 is filled between the piezoelectric ceramic tube 17 and the metal skeleton ring 21 as well as between the piezoelectric ceramic tube and the bearing shaft 4, so that the propagation of sound wave vibration along the bearing shaft 4 is effectively prevented, the strength of sound waves and the reliability of in-situ measurement of sediment acoustics are ensured, and the measurement accuracy is further improved.
The piezoelectric ceramic tube 17 and the bearing shaft 4 form an inner oil cavity 8, the piezoelectric ceramic tube 17 and the sound-transmitting sealing sleeve 6 form an outer oil cavity 7, the inner oil cavity 8 and the outer oil cavity 7 are communicated through oil holes, when the piezoelectric ceramic tube 17 is filled with low-resistance oil, the piezoelectric ceramic tube 17 is completely surrounded by the low-resistance oil, after the transducer enters the seawater, under the elastic adjustment of the sound-transmitting sealing sleeve, the pressure balance between the external seawater and the low-resistance oil of the inner oil cavity 8 and the outer oil cavity 7 is achieved, the pressure of the low-resistance oil applied to the piezoelectric ceramic tube 17 is equal, and the piezoelectric ceramic is not broken due to unidirectional stress.
As shown in fig. 1, the header seal assembly in this embodiment includes a header seal sleeve 5 that is vulcanization-connected with an acoustic transmission seal sleeve 6, a header seal 19 that is disposed between the header seal sleeve 5 and the carrier shaft 4, and a first positioning groove that accommodates the header seal 19 is provided on the outer surface of the carrier shaft 4. As shown in fig. 3, the tail sealing assembly comprises a tail sealing sleeve 9 in vulcanization connection with an acoustic transmission sealing sleeve 6, a tail sealing member 16 positioned between the tail sealing sleeve 9 and a bearing shaft 4, and a sealing rubber gasket 11 positioned between the tail of the tail sealing sleeve 9 and the bearing shaft 4, wherein the sealing rubber gasket 11 is arranged between the tail sealing sleeve 9 and a positioning ring 10, an oil filling hole 15 is arranged at the tail end of the tail sealing sleeve, the oil filling hole sealing member comprises a sealing screw 14 inserted into the oil filling hole 15, a sealing ring 13 sleeved on a screw rod of the sealing screw 14, the area of a screw cap of the sealing screw 14 is larger than the orifice of the oil filling hole 15, the diameter of the sealing ring 13 is smaller than the diameter of the screw cap, and the sealing ring 13 is arranged between the orifice end of the oil filling hole 15 and the screw cap. A gap is arranged between the positioning ring 10 and the tail sealing sleeve 9, and the head sealing sleeve 5, the sound-transmitting sealing sleeve 6 and the tail sealing sleeve 9 slide in the gap range. The outer surface of the carrier shaft 4 is provided with a third detent for receiving the tail seal 16.
In order to ensure the axial stability of the piezoelectric ceramic tube, the piezoelectric ceramic tube is not stressed axially. When the positioning ring 10 is installed, the position of the positioning ring 10 is controlled, so that a very small gap is kept between the tail sealing sleeve 9 and the metal framework ring positioned at the tail end, and a gap of 2-3mm is ensured between the sealing rubber pad 11 and the tail sealing sleeve 9 as well as between the sealing rubber pad and the positioning ring 10.
The head sealing sleeve 5, the tail sealing sleeve 9 and the sound-transmitting sealing sleeve 6 are vulcanized together by vulcanized rubber, the piezoelectric ceramic tube 17 is protected by the sound-transmitting sealing sleeve 6, the abrasion resistance of the transducer is improved, the good elasticity of the sound-transmitting sealing sleeve 6 can ensure the pressure balance between the interior of the transducer and surrounding seawater, the sound wave attenuation of the sound-transmitting sealing sleeve 6 to the transducer is small, and the reliability of acoustic in-situ measurement of sediment can be ensured.
In order to further improve the tightness, a probe rod sealing element 3 is arranged between the probe rod 1 and the bearing shaft 4, and a second positioning groove for accommodating the probe rod sealing element 3 is formed in the outer surface of the bearing shaft 4. The gap between the through hole and the post 25 is sealed by the insulating terminal 18. The watertight cable 2 passes through the through hole of the bearing shaft 4 to the insulating terminal 18 and is connected with the lead 26 connected to the positive electrode and the negative electrode of the piezoelectric ceramic tube 17 through the binding post 25, and the insulating terminal 18 seals the bearing shaft 4 so that low-impedance oil in the inner oil cavity 8 and the outer oil cavity 7 cannot enter the bearing shaft 4.
In this embodiment, the penetration cone 12 is installed at the tail end of the bearing shaft 4, and the opening angle of the cone tip is 40 degrees, so that the insertion resistance of the transducer can be reduced, the transducer can be smoothly inserted into the sediment to a certain depth, and the influence of the insertion resistance on the performance of the transducer is eliminated.
When in-situ measurement of acoustic properties of the submarine sediment is carried out, at least one transmitting transducer and one receiving transducer are used in pairs, the two transducers penetrate into the sediment at the same time and keep the same height, and when the two transducers are started, the acoustic properties of the submarine sediment can be obtained through the transmitting signals and the receiving signals of the transducers.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the invention.
Claims (8)
1. The transducer for measuring the acoustic characteristics of the submarine sediment in situ is characterized by comprising a bearing shaft, a probe rod fixedly connected to the head part of the bearing shaft and a penetration cone fixedly connected to the tail part of the bearing shaft; the bearing shaft is provided with a through hole communicated with the inner cavity, a binding post is arranged in the through hole, the binding post is wrapped and fixed in the through hole through an insulating terminal, two ends of the binding post are provided with wires, and one end of each wire is connected with the watertight cable;
a plurality of piezoelectric ceramic tubes are sleeved on a bearing shaft between the probe rod and the penetration cone, an inner oil cavity is formed between the piezoelectric ceramic tubes and the bearing shaft, an acoustic sealing sleeve is sleeved outside the piezoelectric ceramic tubes, an outer oil cavity is formed by the piezoelectric ceramic tubes and the acoustic sealing sleeve, two adjacent piezoelectric ceramic tubes and an end piezoelectric ceramic tube are fixed through a fixing assembly arranged on the bearing shaft, and the fixing assembly is provided with an oil through hole for communicating the inner oil cavity with the outer oil cavity; the other end of the lead is electrically connected with the piezoelectric ceramic tube;
the head end of the sound-transmitting sealing sleeve is provided with a head sealing assembly, the tail end of the sound-transmitting sealing sleeve is provided with a tail sealing assembly, the head sealing assembly and the tail sealing assembly seal the outer oil cavity and the inner oil cavity, and the tail sealing assembly comprises an oil injection hole communicated with the outer oil cavity and a sealing piece used for sealing the oil injection hole; a positioning ring is arranged between the tail sealing assembly and the penetration cone;
the probe rod is fixedly connected with the bearing shaft through threads, a probe rod sealing piece is arranged between the probe rod and the bearing shaft, and a second positioning groove for accommodating the probe rod sealing piece is formed in the outer surface of the bearing shaft;
the inner oil cavity and the outer oil cavity are filled with low-resistance oil.
2. The in situ measurement transducer of acoustic properties of a subsea sediment of claim 1, wherein the stationary assembly comprises a metal skeleton ring sleeved on the bearing shaft and two epoxy locating rings sleeved on the metal skeleton ring; the inner surface of the metal framework ring is provided with a plurality of oil grooves, the middle part of the outer surface of the metal framework ring is provided with an annular convex edge, at least one end surface of the metal framework ring is provided with a threading groove, and the threading groove corresponds to the oil grooves; at least one section of surface of the epoxy positioning ring is provided with a threading oil through groove, the two epoxy positioning rings are respectively sleeved on the outer surfaces of the metal framework rings at the two sides of the annular convex edges, and the threading oil through groove corresponds to the threading groove and the oil through groove.
3. The in-situ measurement transducer for acoustic properties of a submarine sediment according to claim 2, wherein four piezoelectric ceramic tubes are provided, five metal skeleton rings are provided, eight epoxy positioning rings are provided, three metal skeleton rings are provided between two adjacent piezoelectric ceramic tubes, one metal skeleton ring is provided at the head part of each piezoelectric ceramic tube and one metal skeleton ring is provided at the tail part of each piezoelectric ceramic tube, two epoxy positioning rings are sleeved on each metal skeleton ring provided between two adjacent piezoelectric ceramic tubes, one epoxy positioning ring is sleeved on each metal skeleton ring provided at the head part of each piezoelectric ceramic tube and one metal skeleton ring provided at the tail part of each piezoelectric ceramic tube, and the epoxy positioning rings are in contact with the end surfaces of the piezoelectric ceramic tubes; the four piezoelectric ceramic tubes are connected in series to form a transmitting transducer, or the four piezoelectric ceramic tubes are connected in parallel to form a receiving transducer.
4. The in situ measurement transducer of acoustic properties of a subsea sediment according to claim 1, wherein the header seal assembly comprises a header seal sleeve in vulcanization connection with the acoustic transmission seal sleeve, a header seal member disposed between the header seal sleeve and the carrier shaft, the carrier shaft outer surface having a first positioning groove for receiving the header seal member.
5. The in-situ measurement transducer of acoustic properties of a submarine sediment according to claim 4, wherein the tail sealing assembly comprises a tail sealing sleeve in vulcanization connection with the sound-transmitting sealing sleeve, a tail sealing piece positioned between the tail sealing sleeve and the bearing shaft, and a sealing rubber pad positioned between the tail of the tail sealing sleeve and the bearing shaft, wherein the sealing rubber pad is arranged between the tail sealing sleeve and the positioning ring, the tail end of the tail sealing sleeve is provided with the oil filling hole, the oil filling hole sealing piece comprises a sealing screw inserted into the oil filling hole and a sealing ring sleeved on a pin rod of the sealing screw, the area of a pin cap of the sealing screw is larger than the hole opening of the oil filling hole, the diameter of the sealing ring is smaller than the diameter of the pin cap, and the sealing ring is arranged between the hole opening end of the oil filling hole and the pin cap.
6. The in situ measurement transducer of acoustic properties of a subsea sediment of claim 5, wherein a gap is provided between the retaining ring and the tail gland, and the head gland, the acoustically transparent gland and the tail gland slide within the gap.
7. The in situ measurement transducer of acoustic properties of a subsea sediment according to claim 1, characterized in that the cone tip opening angle of the penetration cone is 40 °.
8. The in situ measurement transducer of acoustic properties of a subsea sediment according to claim 1, characterized in that the gap between the through hole and the terminal post is sealed by the insulated terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810842140.1A CN108732252B (en) | 2018-07-27 | 2018-07-27 | In-situ measuring transducer for acoustic characteristics of submarine sediment |
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| CN201810842140.1A CN108732252B (en) | 2018-07-27 | 2018-07-27 | In-situ measuring transducer for acoustic characteristics of submarine sediment |
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| CN108732252A CN108732252A (en) | 2018-11-02 |
| CN108732252B true CN108732252B (en) | 2023-09-01 |
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| CN111141835A (en) * | 2020-01-09 | 2020-05-12 | 自然资源部第一海洋研究所 | Submarine sediment in-situ shear wave transmitting transducer |
| CN113687339B (en) * | 2021-07-15 | 2024-03-08 | 中国船舶重工集团公司第七一五研究所 | High-frequency arc-shaped emission matrix for full-sea deep work |
| CN115615534B (en) * | 2022-12-16 | 2023-03-28 | 中海油田服务股份有限公司 | Liquid-filled probe rod and measuring device for measuring in-situ sound velocity of submarine sediment |
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| CN106645421A (en) * | 2016-12-21 | 2017-05-10 | 国家海洋局第二海洋研究所 | Bottom sediment acoustics in-situ measurement and synchronous sampling device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101923073A (en) * | 2010-08-28 | 2010-12-22 | 国家海洋局第一海洋研究所 | Hydraulic drive injection based bottom sediment acoustic characteristic in-situ detecting system |
| CN201773088U (en) * | 2010-08-28 | 2011-03-23 | 国家海洋局第一海洋研究所 | In-situ detection system for acoustical characteristic of submarine sediment capable of being penetrated based on hydraulic drive |
| CN201773092U (en) * | 2010-08-28 | 2011-03-23 | 国家海洋局第一海洋研究所 | Energy converter penetration device for sea-bottom sediment acoustic property in-site measurement |
| CN201828545U (en) * | 2010-09-27 | 2011-05-11 | 国家海洋局第一海洋研究所 | In-situ measuring device for sea-bottom depositional optical parameters |
| CN105548368A (en) * | 2016-02-06 | 2016-05-04 | 国家海洋局第一海洋研究所 | Ballast injection type in-situ measurement device for acoustic characteristics of bottom sediments |
| CN106645421A (en) * | 2016-12-21 | 2017-05-10 | 国家海洋局第二海洋研究所 | Bottom sediment acoustics in-situ measurement and synchronous sampling device and method |
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