Low-jitter noise hydrophone cable

Abstract

The utility model relates to the technical field of hydrophone cables, in particular to a low-jitter noise hydrophone cable. Comprising a hydrophone sensitive element, a cable and a watertight pouring body, the device is characterized by further comprising an elastic support body and an inclined support, the elastic support bodies are symmetrically glued at the two ends of the hydrophone sensitive element respectively; wherein a transmission wire of the cable is respectively connected with a positive electrode and a negative electrode of the hydrophone sensitive element, a plurality of inclined supports are circumferentially led out and distributed on the cable, and the other ends of the inclined supports are connected with the elastic support body; and the hydrophone sensitive element, a cavity among the elastic support body and the inclined support and the cable close to the inclined support are completely filled and wrapped into a whole through the watertight pouring body. According to the utility model, the disturbance noise of the cable to the hydrophone can be greatly reduced, and the signal quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrophone cables, in particular to a low-jitter noise hydrophone cable. Background Art

[0002] Hydrophone cables are usually used in strings with hydrophones fixed on the cables at required intervals. Since the hydrophone cable needs to withstand a certain drag force, the load-bearing structure of the cable needs to remain continuous to reduce the risk of breakage during use. Usually, the hydrophone is designed as a hollow structure, and the cable is inserted and fixed. This structure can maintain the tensile strength of the cable.

[0003] However, the structure in which the hydrophone is in direct contact with the cable makes it easy to generate noise signals when being dragged or disturbed by seawater (i.e., the common structure in which the cable passes through the center hole of the piezoelectric ceramic ball causes the cable vibration to be completely transmitted to the ceramic ball, and the forced vibration of the ceramic ball generates a voltage signal output by the piezoelectric effect, which is mixed into the normal signal and is difficult to remove). The noise signal is usually more energetic than the effective hydroacoustic signal to be acquired, and even if filtering measures are taken at the back end, the effect is minimal, which seriously affects the quality of the uploaded signal. Utility Model Content

[0004] The purpose of the utility model is to provide a low-jitter noise hydrophone cable. The structure adopted by the utility model realizes that the piezoelectric ceramic is suspended and fixed on the cable body, and is connected to the cable through a sound-transmitting elastic body to achieve physical isolation, effectively reduce the transmission of the cable body jitter noise, thereby improving the detection quality of the acoustic signal. At the same time, the load-bearing structure of the sound-transmitting frame can ensure the continuity of the hydrophone cable load-bearing.

[0005] In order to solve the above technical problems, the utility model provides a low jitter noise hydrophone cable, comprising a hydrophone sensitive element, a cable and a watertight injection body; and further comprising: an elastic support body and an oblique support; the two ends of the hydrophone sensitive element are symmetrically glued with the elastic support body;

[0006] The transmission conductors of the cable are respectively connected to the positive and negative electrodes of the hydrophone sensitive element, and a plurality of inclined supports are arranged on the circumference of the cable, and the other ends of the inclined supports are connected to the elastic support body;

[0007] The hydrophone sensitive element, the cavity between the elastic support body and the oblique support, and the cable near the oblique support are completely filled and covered as a whole by the watertight potting body.

[0008] Preferably, the hydrophone sensitive element is a piezoelectric ceramic ball, holes are respectively opened at both ends of the piezoelectric ceramic ball to lead out the positive and negative electrodes, and the holes at both ends are glued and fixed to the elastic support body by epoxy glue.

[0009] Preferably, the cable comprises a transmission conductor, a load-bearing element and an outer sheath from the inside to the outside; the load-bearing element is a Kevlar fiber layer, and the outer sheath is a polyurethane layer.

[0010] Preferably, the oblique support is made of Kevlar fiber strands led out from the Kevlar fiber layer inside the cable.

[0011] Preferably, the elastic support body includes: an elastic support block, a through hole, a disc, a U-shaped hole and a circular hole; the through hole is opened at the axis of the elastic support block for inserting a connecting soft wire, and the connecting soft wire is connected to the transmission wire of the cable; the disc is glued and connected to the end face of the elastic support block away from the piezoelectric ceramic ball, and a plurality of U-shaped holes are circumferentially opened at the circumferential edge of the disc, and the circular holes are circumferentially opened on the disc and staggered with the U-shaped holes.

[0012] Preferably, it also includes a support rod, and both ends of the support rod are respectively inserted into the U-shaped hole and fixed by epoxy glue.

[0013] Preferably, the end of the oblique support is inserted into the circular hole and fixed by epoxy glue.

[0014] Preferably, the elastic support block and the watertight injection body are made of polyurethane elastomer material, and the elastic support block has a conical structure.

[0015] Preferably, the disc and the support rod are both made of PVC sound-permeable material.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The structure adopted by the utility model realizes that the piezoelectric ceramic is suspended and fixed on the cable body, and is connected to the cable through a sound-transmitting elastic body to achieve physical isolation, effectively reduce the transmission of the cable body jitter noise, thereby improving the detection quality of the acoustic signal. At the same time, the load-bearing structure of the sound-transmitting frame can ensure the continuity of the hydrophone cable load. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a perspective structural diagram of a low jitter noise hydrophone cable of the utility model.

[0019] Figure 2 This is a structural diagram of the elastic support body and the interior of the oblique support of the utility model.

[0020] Figure 3 This is a cross-sectional structural diagram of the cable of the utility model.

[0021] Figure 4 It is a cross-sectional structural diagram of the elastic support block of the utility model.

[0022] Figure 5 It is the structural diagram of the disc of the utility model.

[0023] In the figure: 1-hydrophone sensitive element, 2-cable, 21-transmission wire, 22-load-bearing element, 23-outer sheath, 3-watertight filling body, 4-elastic support body, 41-elastic support block, 42-through hole, 43-disc, 44-U-shaped hole, 45-round hole, 46-support rod, 5-oblique support. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will become clearer. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0025] like Figures 1 to 5 As shown, an embodiment of the utility model provides a low jitter noise hydrophone cable, comprising a hydrophone sensitive element 1, a cable 2 and a watertight injection body 3; further comprising: an elastic support body 4 and an oblique support 5; the two ends of the hydrophone sensitive element 1 are symmetrically glued with the elastic support bodies 4; wherein the transmission conductor 21 of the cable 2 is respectively connected to the positive and negative electrodes of the hydrophone sensitive element 1, and a plurality of oblique supports 5 are circumferentially led out on the cable 2, and the other end of the oblique support 5 is connected to the elastic support body 4; the hydrophone sensitive element 1, the cavity between the elastic support body 4 and the oblique support 5, and the cable 2 near the oblique support 5 are completely filled and coated as a whole by the watertight injection body 3.

[0026] The hydrophone sensitive element 1 is a piezoelectric ceramic ball. Holes are opened at both ends of the piezoelectric ceramic ball to lead out positive and negative electrodes, and the holes at both ends are glued and fixed to the elastic support body 4 by epoxy glue.

[0027] The cable 2 includes a transmission conductor 21, a load-bearing element 22 and an outer sheath 23 from the inside to the outside; the load-bearing element 22 is a Kevlar fiber layer, and the outer sheath 23 is a polyurethane layer.

[0028] The oblique support 5 is made of Kevlar fiber strands led out from the Kevlar fiber layer inside the cable 2 .

[0029] The elastic support body 4 includes: an elastic support block 41, a through hole 42, a disc 43, a U-shaped hole 44 and a circular hole 45; a through hole 42 is provided at the axis of the elastic support block 41 for inserting a connecting soft wire, and the connecting soft wire is connected to the transmission wire 21 of the cable 2; a disc 43 is glued and connected to the end surface of the elastic support block 41 on the side away from the piezoelectric ceramic ball, and a plurality of U-shaped holes 44 are circumferentially provided at the circumferential edge of the disc 43, and the circular holes 45 are circumferentially provided on the disc 43 and staggered with the U-shaped holes 44. Through the above-mentioned connection and coordination of the oblique support, the elastic support body 4 and the piezoelectric ceramic ball, the coaxiality of the piezoelectric ceramic ball and the cable during installation and connection can be ensured to ensure the measurement effect of the hydrophone; to avoid the displacement of the position of the piezoelectric ceramic ball when the watertight filling body is subsequently poured.

[0030] The support rod 46 is also included. Both ends of the support rod 46 are respectively inserted into the U-shaped hole 44 and fixed by epoxy glue.

[0031] The end of the oblique support 5 is inserted into the circular hole 45 and fixed by epoxy glue.

[0032] The elastic support block 41 and the watertight filling body 3 are made of polyurethane elastomer material, and the elastic support block 41 is a conical structure.

[0033] The disc 43 and the support rod 46 are both made of PVC sound-permeable material.

[0034] It also includes the following production principles:

[0035] The outer sheath 23 of the cable 2 is polyurethane, the load-bearing element 22 is Kevlar fiber, and the transmission conductor 21 is inside the Kevlar fiber. The cable 2 is completely disconnected at the hydrophone, i.e., the piezoelectric ceramic ball. The Kevlar fiber strands led out from the inside of the cable 2 are respectively inserted into the circular holes 45 of the discs 43 at both ends and fixed by epoxy glue injection method; the entire bracket, i.e., the disc 43 and the support rod 46, are made of PVC sound-permeable material, with discs 43 at both ends and 3 cylindrical support rods 46 evenly distributed along the circumference. The support rod 46 is installed into the U-shaped hole 44 from the outside of the ring and is firmly bonded by epoxy glue to withstand axial tension; the hydrophone, i.e., the piezoelectric ceramic ball, is at both ends. The end is a polyurethane elastomer support block prefabricated by a mold, the polyurethane elastomer support block and the disc 43 are glued and fixed by epoxy glue, and the ceramic ball is glued and fixed to the polyurethane elastomer support block, so that the ceramic ball is suspended in the load-bearing frame; since the hydrophone sensitive element 1 is a piezoelectric ceramic ball, holes are opened at both ends of the piezoelectric ceramic ball to lead out the positive and negative electrodes, which are connected to the internal transmission wire 21 of the cable 2 through a connecting soft wire; the piezoelectric ceramic ball, the elastic support block 41, the disc 43, the oblique support 5, the connecting soft wire, and part of the cable 2 are watertightly coated as a whole by using polyurethane elastomer to form a watertight injection body 3.

[0036] The suspended piezoelectric ceramic structure of the utility model has only a soft wire connecting the cable body and the piezoelectric ceramic ball, which is wrapped in the middle of the polyurethane elastomer. The energy generated by the vibration is greatly weakened by the strain of the elastomer, and the vibration finally transmitted to the ceramic ball is so weak that it cannot be counted in engineering, thereby achieving the effect of reducing the cable jitter noise. The utility model can greatly reduce the disturbance noise of the cable to the hydrophone and improve the signal quality; the manufacturing process is simple, and the consistency of the hydrophone cables produced in batches is excellent; the all-solid structure has high reliability in long-term use.

[0037] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation to the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A low jitter noise hydrophone cable, comprising a hydrophone sensitive element (1), a cable (2) and a watertight filling body (3); characterized in that: Also includes: An elastic support body (4) and an oblique support (5); the elastic support body (4) is symmetrically glued to both ends of the hydrophone sensitive element (1); The transmission conductor (21) of the cable (2) is respectively connected to the positive and negative electrodes of the hydrophone sensitive element (1), and a plurality of inclined supports (5) are arranged circumferentially on the cable (2), and the other end of the inclined support (5) is connected to the elastic support body (4); The hydrophone sensitive element (1), the cavity between the elastic support body (4) and the inclined support (5), and the cable (2) near the inclined support (5) are completely filled and covered as a whole by the watertight potting body (3).

2. A low jitter noise hydrophone cable as claimed in claim 1, characterized in that: The hydrophone sensitive element (1) is a piezoelectric ceramic ball, holes are respectively opened at both ends of the piezoelectric ceramic ball to lead out positive and negative electrodes, and the holes at both ends are glued and fixed to the elastic support body (4) by epoxy glue.

3. A low jitter noise hydrophone cable as claimed in claim 1, characterized in that: The cable (2) comprises, from the inside to the outside, a transmission conductor (21), a load-bearing element (22) and an outer sheath (23); the load-bearing element (22) is a Kevlar fiber layer, and the outer sheath (23) is a polyurethane layer.

4. A low jitter noise hydrophone cable as claimed in claim 3, characterized in that: The oblique support (5) is made of Kevlar fiber strands drawn out from the Kevlar fiber layer inside the cable (2).

5. A low jitter noise hydrophone cable as claimed in claim 2, characterized in that: The elastic support body (4) comprises: an elastic support block (41), a through hole (42), a disc (43), a U-shaped hole (44) and a circular hole (45); the through hole (42) is provided at the axis of the elastic support block (41) for inserting a connecting soft wire, the connecting soft wire being connected to the transmission wire (21) of the cable (2); the disc (43) is glued and connected to the end surface of the elastic support block (41) away from the piezoelectric ceramic ball, a plurality of U-shaped holes (44) are circumferentially provided at the circumferential edge of the disc (43), and the circular holes (45) are circumferentially provided on the disc (43) and are arranged alternately with the U-shaped holes (44).

6. A low jitter noise hydrophone cable as claimed in claim 5, characterized in that: It also includes a support rod (46), with two ends of the support rod (46) respectively inserted into the U-shaped hole (44) and fixed by epoxy glue.

7. A low jitter noise hydrophone cable as claimed in claim 5, characterized in that: The end of the oblique support (5) is inserted into the circular hole (45) and fixed by epoxy glue.

8. A low jitter noise hydrophone cable as claimed in claim 5, characterized in that: The elastic support block (41) and the watertight injection body (3) are made of polyurethane elastomer material, and the elastic support block (41) has a conical structure.

9. A low jitter noise hydrophone cable as claimed in claim 6, characterized in that: The disc (43) and the support rod (46) are both made of PVC sound-permeable material.

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