Digital hydrophone

Abstract

The utility model discloses a digital hydrophone which comprises a stainless steel shell and an underwater acoustic sensor, the underwater acoustic sensor is detachably installed at the bottom end of the stainless steel shell, the top of the stainless steel shell is in threaded connection with an upper cover, and an installation assembly is arranged in the upper cover. The installation base is used for installing a pre-amplifier, a high-pass filter, an analog-to-digital converter, a signal processor and a data memory. According to the utility model, the mounting assembly is arranged on the upper cover, and the pre-amplifier, the high-pass filter, the analog-to-digital converter, the signal processor and the data memory are arranged on the strip-shaped mounting seat arranged on the mounting assembly, are positioned in the center of the inner part of the stainless steel shell and are not contacted with the outer wall of the stainless steel shell, so that the digital hydrophone is convenient to use when being used; when the stainless steel shell is collided or vibrated, the stress of the stainless steel shell cannot be directly applied to the electronic element.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrophones, in particular to a digital hydrophone. Background Art

[0002] A hydrophone is a transducer that converts underwater acoustic signals into electrical signals. It plays an important role in many fields such as human research on complex underwater environments, target positioning and identification, underwater communication and navigation, and underwater noise measurement. Therefore, in underwater acoustic engineering, hydrophones have always been in a fundamental position. Traditional hydrophones are only used as sensors, and usually directly transmit and process the analog signals output by the sensor (or after amplification). However, the signal is easily affected by the length of the wire and external environmental noise during transmission. Therefore, complex equipment such as preamplifiers, filters, signal conditioning circuits, signal acquisition circuits, and oscilloscopes are required to collect and analyze the characteristics of the signal.

[0003] Publication (announcement) number: CN107132570A, discloses a digital hydrophone system, which is provided with a stainless steel shell, and also includes an acoustic sensor and a preamplifier, a high-pass filter, an analog-to-digital converter, a signal processor and a data storage device built into the stainless steel shell. The signal processor includes a DSP chip and a peripheral circuit electrically connected to the DSP chip, the acoustic sensor, the preamplifier are connected, the high-pass filter, and the analog-to-digital converter are connected in sequence, the signal output end of the analog-to-digital converter is bidirectionally connected to the DSP chip, the data storage device is bidirectionally connected to the DSP chip, and the signal processor is connected to a display via a data transmission cable. The display is used to display the time domain information and frequency domain information of the acoustic signal, so as to observe the time domain and frequency domain information structure of the acoustic signal, providing a solid foundation for further signal analysis.

[0004] As mentioned above, the existing digital hydrophone is generally composed of a housing, an underwater acoustic sensor, and electronic components such as a preamplifier, a filter, a signal conditioning circuit, a signal acquisition circuit, and an oscilloscope built into the housing. At present, the preamplifier, the filter, the signal conditioning circuit, the signal acquisition circuit, and the oscilloscope are directly built into the housing. Firstly, when the housing is in use, it is very easy to cause damage to the internal electronic components due to collision or vibration. Secondly, when the electronic components are built into the housing, the internal space of the housing is small, and inspection and maintenance are very inconvenient. Utility Model Content

[0005] The purpose of the utility model is to overcome the problem in the prior art that the preamplifier, filter, signal conditioning circuit, signal acquisition circuit and oscilloscope are directly built into the outer shell. Firstly, when the outer shell is in use, it is very easy to cause damage to the internal electronic components due to collision or vibration. Secondly, the electronic components are built into the outer shell, and the inner space of the outer shell is small, which makes it very inconvenient to inspect and maintain. A digital hydrophone is provided, in which a mounting assembly is arranged on the upper cover, and the preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage are mounted on a strip mounting seat arranged on the mounting assembly, which is located at the inner center of the stainless steel outer shell and is aligned with the stainless steel outer shell. The outer wall of the digital hydrophone does not contact the outer wall, so that when the stainless steel shell collides or vibrates during use, the force will not be directly applied to the electronic components (preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage), thereby improving the service life of the electronic components. Secondly, the strip mounting seat is rotatably connected to the base through a rotating shaft, and the base is fixed to the inner top plate of the upper cover. When the electronic components need to be inspected and maintained, the upper cover can be removed to directly take out the installation assembly, and the cross fixing frame can be removed. The four strip mounting seats are flipped open, and the electronic components can be directly inspected and maintained, thereby greatly improving the convenience of its inspection and maintenance.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model discloses a digital hydrophone, comprising a stainless steel shell and a hydroacoustic sensor, wherein the hydroacoustic sensor is detachably mounted on the bottom end of the stainless steel shell, and an upper cover is threadedly connected to the top of the stainless steel shell;

[0008] An installation component is provided in the upper cover, which is used to install a preamplifier, a high-pass filter, an analog-to-digital converter, a signal processor and a data storage device. When the electronic components (preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage device) need to be inspected and maintained, the installation component can be directly taken out by removing the upper cover, making the inspection and maintenance more convenient.

[0009] The mounting assembly includes a base, which is fixed on the inner top plate of the upper cover, and four annular grooves are provided at the bottom end of the outer wall of the base, and a strip mounting seat is rotatably connected to each other in the four grooves through a rotating shaft, and the bottom ends of the four strip mounting seats are mutually connected and fixed through a cross fixing frame, and a positioning groove used in conjunction with the cross fixing frame is provided at the bottom end of the strip mounting seat, and the preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage are staggeredly installed on the inner walls of the four strip mounting seats, and then the strip mounting seat is rotatably connected to the base through a rotating shaft, and the base is fixed to the inner top plate of the upper cover, and when the electronic components need to be inspected and maintained, the upper cover can be removed to directly take out the mounting assembly, and the cross fixing frame can be removed and the four strip mounting seats can be flipped open to directly inspect and maintain the electronic components, thereby greatly improving the convenience of inspection and maintenance.

[0010] Preferably, the signal output end of the hydroacoustic sensor is connected to the preamplifier, the signal output end of the preamplifier is connected to the high-pass filter, the signal output end of the high-pass filter is connected to the analog-to-digital converter, the signal output end of the analog-to-digital converter is bidirectionally connected to the signal processor, and the data storage device is bidirectionally connected to the signal processor.

[0011] Preferably, the base is a cylindrical structure, the stainless steel shell is a cylindrical tubular structure, and the outer diameter of the base is smaller than the inner diameter of the stainless steel shell.

[0012] Preferably, an annular sealing cover is integrally formed on the outer wall of the upper cover, and a sealing ring is sleeved on the inner wall of the annular sealing cover, thereby increasing the annular sealing cover and the sealing ring, so that when the upper cover is threadedly connected to the stainless steel shell, the annular sealing cover will be sleeved on the outer wall of the stainless steel shell, and cooperate with the setting of the sealing ring to further achieve secondary sealing, thereby improving the sealing performance of the connection between the upper cover and the stainless steel shell.

[0013] Preferably, the cross fixing frame and the strip mounting seat are detachably fixed by fastening bolts, and bolt fixing holes for matching with the fastening bolts are provided on the inner bottom plate of the positioning groove, that is, the cross fixing frame is detachably connected and fixed to the strip mounting seat by the fastening bolts. When inspecting the electronic components installed on the strip mounting seat, the fastening bolts can be removed and the four strip mounting seats can be flipped open.

[0014] Preferably, a plurality of annular buffer pads are bonded to the inner wall of the stainless steel shell, and the plurality of annular buffer pads are sleeved on the outside of the four strip mounting seats. The annular buffer pads are arranged in the gap between the mounting assembly and the stainless steel shell to assist in limiting the mounting assembly and improve stability.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The digital hydrophone is provided with a mounting assembly on the upper cover, and the preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage are mounted on a strip-shaped mounting seat provided on the mounting assembly, which is located at the inner center of a stainless steel shell and does not contact the outer wall of the stainless steel shell, so that when the digital hydrophone is in use, when the stainless steel shell collides or vibrates, the force is not directly applied to the electronic components (preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage), thereby improving the service life of the electronic components;

[0017] Secondly, the strip mounting seat is rotatably connected to the base through a rotating shaft, and the base is fixed on the inner top plate of the upper cover. When the electronic components need to be inspected and maintained, the upper cover can be removed to directly take out the mounting assembly, and the cross fixing frame can be removed. The four strip mounting seats can be flipped open, and the electronic components can be directly inspected and maintained, which greatly improves the convenience of inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is a cross-sectional view of the utility model;

[0021] Figure 4 It is a cross-sectional view of the stainless steel housing of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the upper cover in the utility model;

[0023] Figure 6 It is a structural schematic diagram of the strip-shaped mounting seat in the utility model.

[0024] Figure numerals: 1. stainless steel shell; 101. annular buffer pad; 2. upper cover; 201. sealing cover; 202. sealing ring; 203. base; 204. groove; 205. strip mounting seat; 206. positioning groove; 207. cross fixing frame; 208. rotating shaft; 209. fastening bolt; 210. bolt fixing hole; 3. hydroacoustic sensor. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1 -Attached Figure 6, further illustrating a specific implementation of a digital hydrophone of the utility model, overcoming the problem in the prior art that the preamplifier, filter, signal conditioning circuit, signal acquisition circuit, and oscilloscope are directly built into the outer shell. First, when the outer shell is in use, it is very easy to cause damage to the internal electronic components due to collision or vibration. Secondly, the electronic components are built into the outer shell, and the internal space of the outer shell is small, which makes inspection and maintenance very inconvenient. A digital hydrophone is provided, in which a mounting assembly is provided on the upper cover, and the preamplifier, high-pass filter, analog-to-digital converter, signal processor, and data storage are mounted on a strip mounting seat provided on the mounting assembly, which is located at the inner center of the stainless steel outer shell. , and does not contact the outer wall of the stainless steel housing, so that when the digital hydrophone is in use, when the stainless steel housing collides or vibrates, its force will not be directly applied to the electronic components (preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage), thereby improving the service life of the electronic components. Secondly, the strip mounting seat is rotatably connected to the base through a rotating shaft, and the base is fixed to the inner top plate of the upper cover. When the electronic components need to be repaired and maintained, the upper cover can be removed to directly take out the installation assembly, and the cross fixing frame can be removed, and the four strip mounting seats can be flipped open, so that the electronic components can be directly repaired and maintained, thereby greatly improving the convenience of its repair and maintenance. The utility model is a digital hydrophone not limited to the description of the following embodiments.

[0026] Embodiment 1:

[0027] A digital hydrophone comprises a stainless steel housing 1 and a hydroacoustic sensor 3, wherein the hydroacoustic sensor 3 is detachably mounted on the bottom end of the stainless steel housing 1, and an upper cover 2 is threadedly connected to the top of the stainless steel housing 1;

[0028] The upper cover 2 is provided with a mounting assembly for mounting a preamplifier, a high-pass filter, an analog-to-digital converter, a signal processor and a data storage device;

[0029] The mounting assembly includes a base 203, which is fixed on the inner top plate of the upper cover 2. Four annular grooves 204 are provided at the bottom end of the outer wall of the base 203. A strip mounting seat 205 is rotatably connected in each of the four grooves 204 via a rotating shaft 208. The bottom ends of the four strip mounting seats 205 are mutually connected and fixed via a cross fixing frame 207. A positioning groove 206 is provided at the bottom end of the strip mounting seat 205 for use with the cross fixing frame 207. The preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage device are staggeredly installed on the inner walls of the four strip mounting seats 205.

[0030] The signal output end of the hydroacoustic sensor 3 is connected to the preamplifier, the signal output end of the preamplifier is connected to the high-pass filter, the signal output end of the high-pass filter is connected to the analog-to-digital converter, the signal output end of the analog-to-digital converter is bidirectionally connected to the signal processor, and the data storage device is bidirectionally connected to the signal processor.

[0031] The base 203 is a cylindrical structure, the stainless steel shell 1 is a cylindrical tubular structure, and the outer diameter of the base 203 is smaller than the inner diameter of the stainless steel shell 1 .

[0032] Specifically, the digital hydrophone is provided with a mounting assembly on the upper cover 2, and the preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage are mounted on a strip-shaped mounting seat 205 provided on the mounting assembly, which is located at the inner center of the stainless steel housing 1 and does not contact the outer wall of the stainless steel housing 1, so that when the digital hydrophone is in use, when the stainless steel housing 1 collides or vibrates, the force is not directly applied to the electronic components (preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage), thereby improving the service life of the electronic components;

[0033] Secondly, the strip mounting seat 205 is rotatably connected to the base 203 via the rotating shaft 208, and the base 203 is fixed on the inner top plate of the upper cover 2. When the electronic components need to be inspected and maintained, the upper cover 2 is removed to directly take out the mounting assembly, and the cross fixing frame 207 is removed. The four strip mounting seats 205 are flipped open, and the electronic components can be directly inspected and maintained, which greatly improves the convenience of inspection and maintenance.

[0034] Example 2

[0035] An annular sealing cover 201 is integrally formed on the outer wall of the upper cover 2 , and a sealing ring 202 is sleeved on the inner wall of the annular sealing cover 201 .

[0036] On the basis of the above embodiments, this embodiment adds an annular sealing cover 201 and a sealing ring 202, so that when the upper cover 2 is threadedly connected to the stainless steel shell 1, the annular sealing cover 201 will be sleeved on the outer wall of the stainless steel shell 1, and cooperate with the setting of the sealing ring 202 to further achieve secondary sealing, thereby improving the sealing performance of the connection between the upper cover 2 and the stainless steel shell 1.

[0037] Example 3

[0038] The cross fixing frame 207 and the strip mounting seat 205 are detachably mounted and fixed by fastening bolts 209 , and bolt fixing holes 210 for cooperating with the fastening bolts 209 are provided on the inner bottom plate of the positioning groove 206 , and a plurality of annular buffer pads 101 are bonded to the inner wall of the stainless steel shell 1 , and the plurality of annular buffer pads 101 are sleeved on the outer sides of the four strip mounting seats 205 .

[0039] Specifically, based on the above-mentioned embodiments, this embodiment further discloses an installation method of the cross fixing frame 207, that is, the cross fixing frame 207 is detachably connected and fixed to the strip mounting seat 205 by the fastening bolts 209. When inspecting the electronic components installed on the strip mounting seat 205, the fastening bolts 209 can be removed and the four strip mounting seats 205 can be flipped open;

[0040] Furthermore, an annular buffer pad 101 is added. The annular buffer pad 101 is arranged in the gap between the mounting component and the stainless steel shell 1. On the one hand, it can assist in limiting the mounting component and improve stability. On the other hand, it can reduce the force exerted by the stainless steel shell 1 on the mounting component when the stainless steel shell 1 is hit.

[0041] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A digital hydrophone, comprising a stainless steel housing (1) and a hydroacoustic sensor (3), wherein the hydroacoustic sensor (3) is detachably mounted on the bottom end of the stainless steel housing (1), characterized in that: The top of the stainless steel housing (1) is threadedly connected to an upper cover (2); The upper cover (2) is provided with a mounting assembly for mounting a preamplifier, a high-pass filter, an analog-to-digital converter, a signal processor and a data storage device; The mounting assembly comprises a base (203), the base (203) being fixed on the top plate inside the upper cover (2), the bottom end of the outer wall of the base (203) being provided with four grooves (204) distributed in an annular shape, the four grooves (204) being rotatably connected with a bar-shaped mounting seat (205) via a rotating shaft (208), the bottom ends of the four bar-shaped mounting seats (205) being mutually connected and fixed via a cross fixing frame (207), the bottom end of the bar-shaped mounting seat (205) being provided with a positioning groove (206) used in conjunction with the cross fixing frame (207), and the preamplifier, high-pass filter, analog-to-digital converter, signal processor and data storage are staggeredly mounted on the inner walls of the four bar-shaped mounting seats (205).

2. A digital hydrophone according to claim 1, characterized in that: The signal output end of the hydroacoustic sensor (3) is connected to the preamplifier, the signal output end of the preamplifier is connected to the high-pass filter, the signal output end of the high-pass filter is connected to the analog-to-digital converter, the signal output end of the analog-to-digital converter is bidirectionally connected to the signal processor, and the data storage device is bidirectionally connected to the signal processor.

3. A digital hydrophone according to claim 1 or 2, characterized in that: The base (203) is a cylindrical structure, the stainless steel shell (1) is a cylindrical tubular structure, and the outer diameter of the base (203) is smaller than the inner diameter of the stainless steel shell (1).

4. A digital hydrophone according to claim 3, characterized in that: An annular sealing cover (201) is integrally formed on the outer wall of the upper cover (2), and a sealing ring (202) is sleeved on the inner wall of the annular sealing cover (201).

5. A digital hydrophone according to claim 4, characterized in that: The cross fixing frame (207) and the strip-shaped mounting seat (205) are detachably mounted and fixed via fastening bolts (209), and bolt fixing holes (210) used in conjunction with the fastening bolts (209) are provided on the inner bottom plate of the positioning groove (206).

6. A digital hydrophone according to claim 1, characterized in that: A plurality of annular buffer pads (101) are bonded to the inner wall of the stainless steel housing (1), and the plurality of annular buffer pads (101) are sleeved on the outer sides of the four strip-shaped mounting seats (205).

Images