A lake test method for acoustic compatibility of high-power jammers with towed linear arrays

Abstract

The present invention discloses a lake test method for acoustic compatibility of high-power jammers with towed linear arrays, and belongs to the technical field of ship acoustic compatibility design. S1. Constructing a towed linear array test device on a lake, including placing a towed linear array and a standard hydrophone at a certain depth underwater; S2. Constructing a high-power jammer test device on a lake, including placing a number of test samples at a certain depth underwater; S3. Circumferentially arranging a number of high-power jammer test devices within a certain range outside the towed linear array, and successively detonating the test samples in a number of high-power jammer test devices; S4. The standard hydrophone collects the acoustic interference signal generated by the explosion of the test sample, and determines whether the front-end receiving channel of the towed linear array is saturated; S5. The signal processing end of the towed linear array collects the acoustic interference signal generated by the explosion of the test sample. This technical solution is used to accurately determine the acoustic compatibility of high-power jammers with towed linear arrays.

Description

Technical Field

[0001] The invention belongs to the technical field of ship acoustic compatibility design, and in particular relates to a lake test method for acoustic compatibility of a high-power jammer with a towed linear array. Background Art

[0002] Taking foreign surface ships as an example, in order to effectively counter the threats of submarines and torpedoes underwater, surface ships are usually equipped with towed linear array sonar, acoustic decoys, jammers, interceptor missiles and other equipment, especially high-power jammers, which can directly produce relatively serious suppression interference to the sonar systems of underwater submarines and other targets, making it difficult for their sonar systems to work effectively. However, when high-power jammers are working, due to their high transmission power, they will also produce serious acoustic interference to the towed linear array of surface ships under certain circumstances, making it difficult for the towed linear array sonar of surface ships to work normally.

[0003] Since the acoustic propagation environment is relatively complex and has certain fluctuation characteristics, and high-power jammers have transient and broadband working characteristics, it is difficult to conduct acoustic compatibility analysis of high-power jammers with towed linear arrays through simulation calculations. Usually, equivalent simulation tests on the lake are used to more accurately judge the acoustic compatibility of high-power jammers with towed linear arrays. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a lake test method for the acoustic compatibility of high-power jammers with towed linear arrays, so as to accurately determine the acoustic compatibility of high-power jammers with towed linear arrays.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a lake test method for acoustic compatibility of a high-power jammer with a towed linear array, comprising the following steps:

[0007] S1. Construct a towed linear array test device on the lake, including placing the towed linear array and standard hydrophone at a certain depth underwater;

[0008] S2. Construct a high-power jammer test facility on the lake, including placing several test samples at a certain depth underwater;

[0009] S3. Arrange a number of high-power jammer test equipment in a certain range outside the towed linear array, and detonate the test samples in the high-power jammer test equipment one after another;

[0010] S4. The standard hydrophone collects the acoustic interference signal generated by the explosion of the test sample and determines whether the front-end receiving channel of the towed linear array is saturated;

[0011] S5. The signal processing end of the towed linear array collects the acoustic interference signal generated by the explosion of the test sample. According to the radiation noise value of the typical target, after the sound field propagation and absorption attenuation, according to the beamforming calculation of the sonar signal processing and the target detection, the target detection threshold curve is obtained. According to the received interference source signal, the influence of the interference source on the working performance of the towed linear array under different directions and distances is analyzed and judged.

[0012] Further, in step S3, according to the working characteristics of the towed linear array in the noise detection mode, high-power jamming equipment is arranged at 30°, 60°, 90°, 120°, 150° and other directions of the towed linear array sonar, and the interference of the high-power jamming equipment to the towed linear array sonar in typical directions is tested respectively.

[0013] Further, in step S4, array element domain signals are usually collected at the rear end of the transducer of the towed linear array device, and at the same time, the signals at the rear ends of the primary amplifier, the primary filter, the secondary amplifier, and the secondary filter are respectively calculated, and the time domain waveform of the interference at each level output is combined with the amplitude-frequency response characteristics of each link of the front-end receiving channel. The peak value of the time domain signal obtained at each measuring point of the receiving channel is compared with the corresponding amplification and filtering limiting voltage to determine whether saturation occurs in this link. When the peak value of the time domain waveform is greater than the limiting voltage, it is determined that saturation occurs, otherwise, it is determined that saturation does not occur.

[0014] Further, in step S1, the towed linear array test equipment also includes a carrying ship, a retracting winch, a pull rope, a floating rod, a suspension rope, a tow cable and a counterweight, one end of the pull rope is fixed to the mountain at the edge of the lake, and the other end is fixed to the side of the carrying ship, the floating rod is sleeved on the pull rope, one end of a plurality of suspension ropes is connected to the floating rod, and the other end is connected to the towed linear array, the suspension ropes are provided with a counterweight on one end connected to the towed linear array, the standard hydrophone is suspended on the floating rod by the suspension rope, one end of the tow cable is connected to one end of the towed linear array, and the other end is connected to the retracting winch arranged on the carrying ship.

[0015] Further, the floating rod includes a left outer floating rod, a right outer floating rod, a middle inner floating rod, a return spring, a left traction rope, a right traction rope, a left fixed pulley and a right fixed pulley, the left outer floating rod, the right outer floating rod and the middle inner floating rod are serially sleeved on the pull rope, the two ends of the middle inner floating rod are respectively slidably connected to the inside of the left outer floating rod and the right outer floating rod, the two return spring sleeves are respectively sleeved on the two ends of the middle inner floating rod, and one end of the two return springs is respectively fixed to the outer wall at both ends of the middle inner floating rod, and the other end is respectively fixed to the inner walls at both ends of the left outer floating rod and the right outer floating rod, the left fixed pulley is fixed on the carrying ship, and the right fixed pulley is fixed on the mountain, one end of the left traction rope is fixed to the left outer floating rod, and the other end passes through the left fixed pulley to be connected to the carrying ship, and one end of the right traction rope is fixed to the right outer floating rod, and the other end passes through the right fixed pulley to be connected to the carrying ship.

[0016] Furthermore, a plurality of the lifting ropes are evenly spaced so as not to extend to the left outer float rod, the middle inner float rod and the right outer float rod, the lifting ropes located on the outer end portions of the left outer float rod, the middle inner float rod and the right outer float rod are respectively fixedly connected to the left outer float rod, the middle inner float rod and the right outer float rod, and the lifting rope ends located at the remaining positions on the left outer float rod and the right outer float rod are provided with sliding rings, which are respectively slidably mounted on the left outer float rod and the right outer float rod.

[0017] Furthermore, a limit spring is provided between adjacent slip rings on the left outer float rod and the right outer float rod. The limit spring is respectively sleeved on the left outer float rod and the right outer float rod, and both ends are respectively fixed on adjacent slip rings.

[0018] Further, in step S2, the high-power interference equipment test equipment also includes a test boat, a junction box, a detonation controller, connecting wires, a test sample and a U-shaped rod, the wiring and the drum controller are arranged on the test boat, the open ends of the U-shaped rod are respectively connected to the bow and stern of the test boat, one end of several of the connecting wires is connected to the junction box, and the other end is connected to the test sample, and several connecting wires are evenly distributed on the closed end of the U-shaped rod.

[0019] Furthermore, the bow and stern of the test boat are provided with inverted T-shaped mounting frames, the ends of the mounting frames are provided with slots, a rotating ring is provided in the slot, and both ends of the U-shaped rod are fixedly connected to the rotating rings respectively.

[0020] Furthermore, both sides of the open end of the U-shaped rod are telescopic rods.

[0021] The beneficial effects of the present invention are:

[0022] Under lake conditions, based on the towing conditions of the surface ship towed linear array sonar and the deployment and use scenarios of high-power jammers, an equivalent simulation environment that is basically consistent with the actual ship's operating conditions is constructed. Lake-based acoustic compatibility tests of high-power jammers with towed linear arrays are conducted to determine the acoustic interference state of high-power jammers on towed linear arrays, and to quantify the impact of high-power jammers on the working performance of towed linear arrays. This provides basic data support for the subsequent use of towed linear arrays and high-power jammers.

[0023] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0025] Figure 1 It is a block diagram of the basic working principle of the towed linear array and the method for determining the detection threshold of the present invention;

[0026] Figure 2 It is a typical receiving channel and signal processing flow chart of the towed linear array of the present invention;

[0027] Figure 3 A schematic diagram of the interference effect of a typical high-power jammer on a towed linear array according to the present invention;

[0028] Figure 4 It is a schematic plan view of the lake towed linear array test equipment of the present invention;

[0029] Figure 5 It is a schematic plan view of the high-power interference equipment test equipment on the lake of the present invention;

[0030] Figure 6 It is a three-dimensional schematic diagram of the lake towed linear array test equipment of the present invention;

[0031] Figure 7 It is a schematic cross-sectional view of the lake towed linear array test equipment of the present invention;

[0032] Figure 8 for Figure 7 A local enlarged schematic diagram of the middle A;

[0033] Fig. 9 This is a partial three-dimensional schematic diagram of the high-power interference equipment test equipment.

[0034] The following are marked in the accompanying drawings:

[0035] Mountain 1, carrying ship 2, pulling rope 3, towing line array 4, towing cable 5, lifting rope 6, counterweight 7, left outer floating rod 8, right outer floating rod 9, middle inner floating rod 10, return spring 11, limit ring 12, standard hydrophone 13, right traction rope 14, left traction rope 15, right fixed pulley 16, left fixed pulley 17, retracting and releasing winch 18, test boat 19, junction box 20, detonation controller 21, connecting wire 22, test sample 23, vertical rod 24, horizontal rod 25, rotating ring 26, slot 27, horizontal fixing plate 28, vertical fixing plate 29, slip ring 30. DETAILED DESCRIPTION

[0036] like Figures 1 to 9 As shown, a lake test method for acoustic compatibility of a high-power jammer with a towed linear array 4 includes the following steps:

[0037] S1, constructing a towed linear array 4 test device on a lake, including placing the towed linear array 4 and a standard hydrophone 13 at a certain depth underwater;

[0038] S2, constructing a high-power jammer test device test device on the lake, including placing a number of test samples 23 at a certain depth underwater;

[0039] S3, arranging a number of high-power jammer test equipment in a certain range outside the towed linear array 4, and successively detonating the test samples 23 in the number of high-power jammer test equipment;

[0040] S4, the standard hydrophone 13 collects the acoustic interference signal generated by the explosion of the test sample 23, and determines whether the front-end receiving channel of the towed linear array 4 is saturated;

[0041] S5. The signal processing end of the towed linear array 4 collects the acoustic interference signal generated by the explosion of the test sample 23. According to the radiation noise value of the typical target, after the sound field propagation and absorption attenuation, according to the beam forming calculation and target detection of the sonar signal processing, the target detection threshold curve is obtained. According to the received interference source signal, the influence of the interference source on the working performance of the towed linear array 4 under different directions and distances is analyzed and judged.

[0042] The specific installation and test steps are as follows:

[0043] 1. Drag Linear Array 4 as the receiving device working condition setting

[0044] (1) Anchorage status of carrier vessel 2

[0045] During the lake trials, the surface vessel was a pump boat with a fixed anchor.

[0046] (2) Drag Linear Array 4 Drag Distance

[0047] According to the water depth of the lake test, a certain towing safety distance is reserved, and the towing array 4 is usually arranged at a certain distance from the carrier ship 2 (generally, a safety distance of no more than 50m is set).

[0048] (3) Drag depth

[0049] According to the water depth and hydrological gradient of the lake test, the towed linear array 4 is generally arranged at a depth of about 15m below the water surface of the lake.

[0050] (4) Development of working conditions such as time domain, frequency domain, and receiving direction

[0051] a. Integration time:

[0052] According to the working characteristics of the towed linear array 4 in the noise detection mode, the integration time of the towed linear array 4 is set from low to high.

[0053] b. Working frequency band:

[0054] According to the working characteristics of the towed linear array 4 in the noise detection mode, working frequencies such as low frequency band, low-medium frequency band, medium frequency band, and high frequency band are selected respectively.

[0055] c. Receiving directivity:

[0056] According to the working characteristics of the towed linear array 4 in the noise detection mode, high-power jamming equipment is usually arranged at 30°, 60°, 90°, 120°, 150° and other azimuths of the towed linear array 4 sonar, and the interference of the high-power jamming equipment on the towed linear array 4 sonar at typical azimuths is tested respectively, including the interference with the main lobe and side lobe of the towed linear array 4 sonar.

[0057] (5) Equivalent layout plan of 4 towed linear array devices on the lake

[0058] The towed array 4 is arranged in the waters on the port or starboard side of the carrier ship 2, one end of which is fixed on the retracting winch 18, and the other end is fixed on the shore or the tugboat with a pull rope 3. The angle between the towed array and the centerline of the test ship is φ (a relatively open area is selected according to the actual situation of the deployment waters, and accurate measurements are performed.

[0059] 2. High-power jammer operating condition settings

[0060] (1) Deployment method

[0061] At the beginning of the deployment phase of the lake test, the high-power jammer test sample 23 and the test equipment were placed on the auxiliary test boat 19, at a certain range and distance from the pump boat carrying the towed linear array 4. During the test, the test sample 23 was placed at a distance of ≥30m from the auxiliary test boat, and the test sample 23 was suspended in the water in a string, and the detonation controller 21 was placed on the auxiliary test boat.

[0062] (2) Deployment position

[0063] The high-power jammer test samples 23 are arranged at typical positions of 30°, 60°, 90° and so on of the towed linear array 4, and the interference test of the high-power jammer on the towed linear array 4 is carried out in turn.

[0064] (3) Deployment distance

[0065] According to the typical working distance index of high-power jammers, the high-power jammer test sample 23 is arranged at a certain distance from the towed linear array 4, and a typical deployment distance is selected by considering factors such as distribution error.

[0066] 3. Receiving channel saturation judgment method based on towed array meta-domain data

[0067] The typical receiving channel and processing process of the surface ship towed linear array 4 device are shown in the attached figure. Figure 2 shown.

[0068] Usually, array element domain signals are collected at the rear end of the transducer of the towed linear array 4 device. At the same time, the signals at the rear end of the primary amplifier, primary filter, secondary amplifier, and secondary filter are respectively calculated. The time domain waveform of the interference at each level output is combined with the amplitude-frequency response characteristics of each link of the front-end receiving channel. The peak value of the time domain signal obtained at each measuring point of the receiving channel is compared with the corresponding amplification and filtering limiting voltage to determine whether saturation occurs in this link. When the peak value of the time domain waveform is greater than the limiting voltage, it is determined that saturation occurs. Otherwise, it is determined that saturation does not occur.

[0069] 4. Interference judgment method based on the detection characteristics of towed linear array 4

[0070] The basic working principle of the towed linear array 4 and the method for determining the detection threshold are shown in the attached Figure 1 shown.

[0071] According to the interference signal emitted by the high-power jammer collected at the signal processing end of the towed linear array 4, according to the radiation noise value of the typical target, after the sound field propagation and absorption attenuation, according to the beamforming calculation and target detection of the sonar signal processing, the target detection threshold curve is obtained. According to the received interference source signal, the influence of the interference source on the working performance of the towed linear array 4 in different directions and distances is analyzed and judged. The interference effect of typical high-power jammers on the towed linear array 4 is shown in the attached figure. Figure 3 shown.

[0072] In one practicable manner, in step S1, the towed array 4 test equipment also includes a carrying ship 2, a retracting winch 18, a pull rope 3, a floating rod, a suspension rope 6, a tow cable 5 and a counterweight 7. One end of the pull rope 3 is fixed to a mountain 1 at the edge of the lake, and the other end is fixed to a side of the carrying ship 2. The floating rod is sleeved on the pull rope 3. One end of a plurality of suspension ropes 6 is connected to the float rod, and the other end is connected to the towed array 4. The suspension ropes 6 are all provided with a counterweight 7 on one end connected to the towed array 4. The standard hydrophone 13 is suspended on the float rod through the suspension rope 6. One end of the tow cable 5 is connected to one end of the towed array 4, and the other end is connected to the retracting winch 18 provided on the carrying ship 2.

[0073] The working principle of the towed line array 4 device is as follows:

[0074] The floating rod is sleeved on the pull rope 3, and then the movement of the carrying boat 2 will drive the pull rope 3 to be straightened. The straightened pull rope 3 can limit the position of the floating rod on the lake surface. Due to the action of the counterweight 7 and the suspension rope 6, the towing line array 4 can be located directly below the floating rod under ideal conditions, and under the action of the counterweight 7, the towing line array 4 is distributed in a straight line underwater.

[0075] In an practicable manner, the floating rod includes a left outer floating rod 8, a right outer floating rod 9, a middle inner floating rod 10, a return spring 11, a left traction rope 15, a right traction rope 14, a left fixed pulley 17 and a right fixed pulley 16. The left outer floating rod 8, the right outer floating rod 9 and the middle inner floating rod 10 are serially sleeved on the pull rope 3, and the two ends of the middle inner floating rod 10 are respectively slidably connected to the inside of the left outer floating rod 8 and the right outer floating rod 9. Two return springs 11 are respectively sleeved on the two ends of the middle inner floating rod 10, and one end of the two return springs 11 is respectively fixed to the outer walls of the two ends of the middle inner floating rod 10. , and the other end is respectively fixed to the inner walls of the two opposite ends of the left outer floating rod 8 and the right outer floating rod 9, the left fixed pulley 17 is fixed to the carrying ship 2, and the right fixed pulley 16 is fixed to the mountain 1, one end of the left traction rope 15 is fixed to the left outer floating rod 8, and the other end passes through the left fixed pulley 17 to be connected to the carrying ship 2, one end of the right traction rope 14 is fixed to the right outer floating rod 9, and the other end passes through the right fixed pulley 16 to be connected to the carrying ship 2. It is not difficult to understand that the installation position of the return spring 11 can be limited by setting a limiting ring 12 at both ends of the return spring 11, as shown in the figure. Figure 7 shown.

[0076] By pulling the left towing rope 15 and the right towing rope 14 on the carrying ship 2, the position of the buoy on the towing rope 3 can be adjusted, and then the position of the towing array 4 under water can be adjusted. The accuracy of the initial movement of the carrying ship 2 to the position of the towing array 4 can be adjusted. At the same time, the retractable winch 18 drives the movement of the towing cable 5, so that the position of the towing array 4 under water can be adjusted, thereby ensuring the relative position of the towing array 4 and the buoy. At the same time, the length of the towing array 4 can be controlled to a certain extent (tightened and relaxed) to cooperate with the position movement of the buoy, and then the two are adjusted together to further ensure the straight line layout of the towing array 4.

[0077] Since one end of the towed linear array 4 is not fixed, it is easy to be torn after being fixed, which is not in line with the actual use of the towed linear array 4 for underwater mobile monitoring under the towing of the ship (when the ship is towing, under the premise of having a certain speed, the towed linear array 4 can basically maintain a straight line layout underwater without bending). Based on this, when doing the above test, in order to ensure the accuracy of the test data as much as possible, it is necessary to ensure the straightness of the towed linear array 4 underwater to avoid bending under the action of wind and waves. Therefore, in this technical solution, if there are wind and waves during the layout process or the test process When the towing rope 15 and the right towing rope 14 are tightened at the same time, the left outer floating rod 8 and the right outer floating rod 9 can be made to slide relative to the middle inner floating rod 10, thereby driving the suspension rope 6 arranged thereon to be tilted and tightened. Under the vertical action of the counterweight 7, a state of pulling the two ends of the towing linear array 4 is presented, thereby allowing the towing linear array 4 to maintain a straight line layout. Such a setting and operation method can cope with the influence of wind and waves in the lake on the towing linear array 4, thereby further improving the accuracy of the test structure. At the same time, tightening the towing linear array 4 can also prevent damage to the towing linear array 4 due to repeated bending under the action of wind and waves.

[0078] Moreover, the above-mentioned setting method can control the retraction and release of the left-side towing rope 15 and the right-side towing rope 14, thereby realizing the sliding of the entire floating rod on the pull rope 3, thereby driving the movement of the towing linear array 4 set at the lower part, thereby more accurately simulating the monitoring state when the ship drives the towing linear array 4 to move, making the measurement result more in line with reality.

[0079] In one feasible manner, a plurality of suspension ropes 6 are equally spaced apart on the left outer float rod 8, the middle inner float rod 10 and the right outer float rod 9; the suspension ropes 6 located on the outer end portions of the left outer float rod 8, the middle inner float rod 10 and the outer end portions of the right outer float rod 9 are fixedly connected to the left outer float rod 8, the middle inner float rod 10 and the right outer float rod 9 respectively; the ends of the suspension ropes 6 located on the remaining positions of the left outer float rod 8 and the right outer float rod 9 are provided with slip rings 30, which are slidably mounted on the left outer float rod 8 and the right outer float rod 9 respectively.

[0080] As described above, if there are a large number of suspension ropes 6, it is only necessary to fix the suspension ropes 6 at both ends of the floating rod to the left outer floating rod 8 and the right outer floating rod 9. Because of this arrangement, when the two ends of the towing line array 4 are pulled and straightened, the suspension ropes 6 at the remaining parts will slide on the floating rod under the action of the slip ring 30, thereby causing the towing line array to be stretched and straightened as a whole. If the suspension ropes 6 are all fixed to the floating rod, then due to the synchronous movement of the suspension ropes 6, the part of the towing line array 4 located between adjacent suspension ropes 6 will not be stretched, and thus it is easy to have transition bending and curvature under the action of wind and waves.

[0081] In an practicable manner, a limit spring is provided between adjacent slip rings 30 on the left outer float rod 8 and the right outer float rod 9. The limit springs are respectively sleeved on the left outer float rod 8 and the right outer float rod 9, and the two ends are respectively fixed on the adjacent slip rings 30. When the wind and waves decrease or the left traction rope 15 and the right traction rope 14 lose their functions, the left outer slide rod and the right outer slide rod will automatically return to their initial positions under the action of the reset spring 11. After returning to the initial positions, due to the position change of the slip ring 30 on the left outer float rod 8 and the right outer float rod 9, At this time, part of the suspension rope 6 is tilted, and the tilted suspension rope 6 will change the depth of the towing array 4. Therefore, in this technical solution, under the reset action of the limit spring, the slip ring 30 will be driven back to the initial position (when the towing array 4 is stretched straight, the slip ring 30 moves and changes the position of the suspension rope 6), so that the slip ring 30 and the corresponding counterweight 7 are in one line (the suspension rope 6 is stretched straight), ensuring the depth-fixing effect of the suspension rope 6 (if the suspension rope 6 is tilted, the depth of the towing array 4 in the water will change), further ensuring the accuracy of the test results.

[0082] In one practicable manner, in step S2, the high-power interference equipment test equipment also includes a test boat 19, a junction box 20, a detonation controller 21, connecting wires 22, a test sample 23 and a U-shaped rod, the wiring and the drum controller are arranged on the test boat 19, the open ends of the U-shaped rod are respectively connected to the bow and the stern of the test boat 19, one end of a plurality of connecting wires 22 is connected to the junction box 20, and the other end is connected to the test sample 23, and the plurality of connecting wires 22 are evenly distributed on the closed end of the U-shaped rod.

[0083] Several test boats 19 are arranged at designated locations, and then the test sample 23 is placed at a certain depth underwater through a U-shaped rod. The explosion of the test sample 23 is then controlled by the detonation controller 21 on the test boat 19, thereby simulating high-power jamming equipment. The test sample 23 can be selected as a bullet.

[0084] In one feasible manner, the bow and stern of the test boat 19 are provided with an inverted T-shaped mounting frame, and the mounting frame includes a transverse fixing plate 28 and a vertical fixing plate 29. A slot 27 is provided on the ends of the transverse fixing plate 28 and the vertical fixing plate 29. The slot 27 is U-shaped, and a rotating ring 26 is provided in the slot 27. The slot 27 limits and supports the rotating ring 26. The two ends of the U-shaped rod are respectively fixedly connected to the rotating ring 26. The advantage of this arrangement is that the U-shaped rod can be driven to rotate by rotating the rotating ring 26, and the U-shaped rod can be rotated to the water surface or below the water surface, which is convenient for arranging the test sample 23 on the U-shaped rod. At the same time, rotating the U-shaped rod to the water surface can also avoid the U-shaped rod from contacting the bottom of the lake and causing the problem of running aground in shallow water areas.

[0085] In one practicable manner, the U-shaped rod includes a vertical rod 24 and a horizontal rod 25, and both ends of the horizontal rod 25 are detachably connected to the ends of the vertical rod 24, such as threaded connections. Preferably, the vertical rod 24 is a telescopic rod, so that the storage box can adjust the depth of the test sample 23 underwater.

[0086] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A lake test method for acoustic compatibility of high-power jammers with towed linear arrays, characterized by: The steps include: S1. Construct a towed linear array test device on the lake, including placing the towed linear array and standard hydrophone at a certain depth underwater; S2. Construct a high-power jammer test facility on the lake, including placing several test samples at a certain depth underwater; S3. Arrange a number of high-power jammer test equipment in a certain range outside the towed linear array, and detonate the test samples in the high-power jammer test equipment one after another; S4. The standard hydrophone collects the acoustic interference signal generated by the explosion of the test sample and determines whether the front-end receiving channel of the towed linear array is saturated; S5. The signal processing end of the towed linear array collects the acoustic interference signal generated by the explosion of the test sample. According to the radiation noise value of the typical target, after the sound field propagation and absorption attenuation, according to the beamforming calculation of the sonar signal processing and the target detection, the target detection threshold curve is obtained. According to the received interference source signal, the influence of the interference source on the working performance of the towed linear array under different directions and distances is analyzed and judged.

2. The method for testing the acoustic compatibility of a high-power jammer with a towed linear array on a lake according to claim 1, characterized in that: In step S3, according to the working characteristics of the towed linear array in the noise detection mode, high-power jamming equipment is arranged at 30°, 60°, 90°, 120°, 150° and other directions of the towed linear array sonar, and the interference of the high-power jamming equipment to the towed linear array sonar in typical directions is tested respectively.

3. The lake test method for acoustic compatibility of a high-power jammer with a towed linear array according to claim 1 is characterized by: In step S4, array element domain signals are usually collected at the rear end of the transducer of the towed linear array device. At the same time, the signals at the rear ends of the primary amplifier, the primary filter, the secondary amplifier, and the secondary filter are respectively collected. The time domain waveform of the interference at each level output is calculated in combination with the amplitude-frequency response characteristics of each link of the front-end receiving channel. The peak value of the time domain signal obtained at each measuring point of the receiving channel is compared with the corresponding amplification and filtering limiting voltage to determine whether saturation occurs in this link. When the peak value of the time domain waveform is greater than the limiting voltage, it is determined that saturation occurs. Otherwise, it is determined that saturation does not occur.

4. The lake test method for acoustic compatibility of a high-power jammer with a towed linear array according to claim 1 is characterized by: In step S1, the towed linear array test equipment also includes a carrying ship, a retracting winch, a pull rope, a floating rod, a suspension rope, a tow cable and a counterweight, one end of the pull rope is fixed to a mountain at the edge of the lake, and the other end is fixed to a side of the carrying ship, the floating rod is sleeved on the pull rope, one end of a plurality of suspension ropes is connected to the floating rod, and the other end is connected to the towed linear array, the suspension ropes are provided with a counterweight on one end connected to the towed linear array, the standard hydrophone is suspended on the floating rod by the suspension rope, one end of the tow cable is connected to one end of the towed linear array, and the other end is connected to the retracting winch arranged on the carrying ship.

5. The method for testing the acoustic compatibility of a high-power jammer with a towed linear array on a lake according to claim 4, characterized in that: The floating rod comprises a left outer floating rod, a right outer floating rod, a middle inner floating rod, a return spring, a left traction rope, a right traction rope, a left fixed pulley and a right fixed pulley, the left outer floating rod, the right outer floating rod and the middle inner floating rod are serially sleeved on the pull rope, the two ends of the middle inner floating rod are respectively slidably connected to the inside of the left outer floating rod and the right outer floating rod, the two return spring sleeves are respectively sleeved on the two ends of the middle inner floating rod, and one end of the two return springs is respectively fixed to the outer wall at both ends of the middle inner floating rod, and the other end is respectively fixed to the inner walls at both ends of the left outer floating rod and the right outer floating rod, the left fixed pulley is fixed on the carrying ship, and the right fixed pulley is fixed on the mountain, one end of the left traction rope is fixed on the left outer floating rod, and the other end passes through the left fixed pulley and is connected to the carrying ship, and one end of the right traction rope is fixed on the right outer floating rod, and the other end passes through the right fixed pulley and is connected to the carrying ship.

6. The method for testing the acoustic compatibility of a high-power jammer with a towed linear array on a lake according to claim 5, characterized in that: The plurality of lifting ropes are evenly spaced and do not extend to the left outer float rod, the middle inner float rod and the right outer float rod. The lifting ropes located on the outer ends of the left outer float rod, the middle inner float rod and the right outer float rod are respectively fixedly connected to the left outer float rod, the middle inner float rod and the right outer float rod. The lifting rope ends at the remaining positions on the left outer float rod and the right outer float rod are provided with sliding rings, which are respectively slidably connected to the left outer float rod and the right outer float rod.

7. The method for testing the acoustic compatibility of a high-power jammer with a towed linear array on a lake according to claim 6, characterized in that: Limiting springs are arranged between adjacent slip rings on the left outer floating rod and the right outer floating rod. The limiting springs are respectively sleeved on the left outer floating rod and the right outer floating rod, and the two ends are respectively fixed on the adjacent slip rings.

8. The method for testing the acoustic compatibility of a high-power jammer with a towed linear array on a lake according to claim 1 is characterized by: In step S2, the high-power interference equipment test equipment also includes a test boat, a junction box, a detonation controller, connecting wires, a test sample and a U-shaped rod. The wiring and the drum controller are arranged on the test boat, and the open ends of the U-shaped rod are respectively connected to the bow and the stern of the test boat. One end of several of the connecting wires is connected to the junction box, and the other end is connected to the test sample, and several connecting wires are evenly distributed on the closed end of the U-shaped rod.

9. The method for testing the acoustic compatibility of a high-power jammer with a towed linear array on a lake according to claim 8, characterized in that: The bow and stern of the test boat are both provided with inverted T-shaped mounting frames, the ends of the mounting frames are both provided with slots, a rotating ring is provided in the slots, and the two ends of the U-shaped rod are respectively fixedly connected to the rotating rings.

10. The lake test method for acoustic compatibility of a high-power jammer with a towed linear array according to claim 9, characterized in that: Both sides of the open end of the U-shaped rod are telescopic rods.

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