Measuring system and measuring method for dynamic response parameters of deepwater impact explosion test

Abstract

The invention relates to a measuring system and a measuring method for dynamic response parameters of a deepwater impact explosion test, and belongs to the technical field of test measuring devices. A split-type watertight plug-in assembly is adopted to penetrate through the bulkhead, the watertight plug-in assembly comprises an outer watertight plug and an inner watertight plug which are in plug-in matching through an adapter socket, and the inner watertight plug and the outer watertight plug are connected with an in-cabin signal adapter and an out-cabin data collector respectively through the inner watertight plug and the outer watertight plug; the inner watertight plug and the outer watertight plug are both steel shells, the tail portions of the shells are sealed through vulcanized rubber, and the adapter socket and the flange face of the base are waterproof through a sealing ring. The in-cabin signal modulator converts multi-path sensor electric signals into single-path optical signals, and the out-cabin data collector demodulates the optical signals and uploads the optical signals to a computer end through a network cable for analysis and storage. According to the application, the defects of low efficiency and poor interference resistance of a traditional cabin penetrating method are overcome, and high-reliability data transmission and equipment protection under deepwater explosion impact are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of test measurement devices, in particular to a measurement system and method for dynamic response parameters of deep water impact explosion tests. BACKGROUND

[0002] With the development of test measurement device technology, cable penetration cabin technology for measuring internal physical parameters of underwater structures has emerged. This technology is characterized by physically penetrating sensor cables through the cabin wall of the structure to achieve direct signal transmission to external acquisition equipment, thereby introducing the "penetration cabin" type measurement method and related devices.

[0003] In related technologies, the following two penetration cabin methods are mainly used:

[0004] Integrated penetration cabin method: this method directly penetrates the signal shielding cable of each sensor through the rubber watertight joint arranged on the cabin wall, relies on the rubber to extrude the cable to achieve sealing, and directly connects the cable to the external acquisition equipment;

[0005] Split penetration cabin method (electrical connector method): this method installs a high-pressure resistant electrical connector on the cabin wall, and welds the core wire and shielding layer of each sensor signal shielding cable to the contact piece and housing of the electrical connector, respectively, to achieve quick on-off of the circuit by plugging the electrical connector.

[0006] However, the above penetration cabin methods and related devices have the following problems:

[0007] For the integrated penetration cabin method, in large-scale tests that require the arrangement of a large number of measuring points, penetrating a large number of cables into the rubber watertight joint with huge resistance one by one results in an exceptionally large amount of test preparation work and low efficiency;

[0008] For the split penetration cabin method, it is easily disturbed by underwater explosion load. At the moment when the shock wave arrives, the vibration of the electrical connector contact piece can cause "flagpole" and "oscillation" noise in the test data, seriously affecting the accuracy and effectiveness of the measurement. Also, there is a problem of a huge amount of preparation work, as the core wire and shielding layer of a large number of cables need to be welded to the electrical connector one by one, which is low in efficiency.

[0009] In addition, there is also an internal storage measurement technology that avoids cable penetration cabin. This technology is characterized by directly placing the acquisition equipment body with storage function inside the test structure to store measurement data in real time, thereby introducing the "non-penetration cabin" type measurement method, such as the acquisition equipment built-in method, which installs the entire acquisition equipment with storage function on the buffer platform inside the structure, and reads the data after recovering the structure.

[0010] However, the problem of the built-in acquisition device method is that once the structure is damaged, massively flooded or even sunk in the underwater shock explosion test, the valuable test data will be completely lost, and the expensive acquisition device will be lost. SUMMARY

[0011] Therefore, it is necessary to provide a measurement system and method for dynamic response parameters of deep water shock explosion test to solve the above problems, so as to accurately and conveniently measure the dynamic response parameters of underwater structures in shock explosion test by using the optical fiber connector to transmit test signals through the cabin wall of the underwater structure, and reduce the risk of losing test data and measuring equipment.

[0012] A measurement system for dynamic response parameters of deep water shock explosion test, comprising:

[0013] a computer terminal, a data acquisition device, a water-tight connector assembly, and a signal adapter and a sensor arranged inside the underwater structure;

[0014] The water-tight connector assembly is a split structure, fixedly installed on the cabin wall of the underwater structure, and comprises an outer water-tight connector and an inner water-tight connector matched by a switching socket.

[0015] The inner water-tight connector is connected to the optical port and power interface of the signal adapter through an inner water-tight connector cable, and the outer water-tight connector is connected to the optical port and power driving interface of the data acquisition device through an outer water-tight connector cable.

[0016] The signal adapter is connected to the multiple sensors through a sensor signal shielding cable, converts the analog electrical signals of the multiple sensors into a single optical signal, and transmits the signal to the data acquisition device through the water-tight connector assembly.

[0017] The data acquisition device demodulates the received single optical signal into a digital signal and transmits it to the computer terminal through a category 6 network cable.

[0018] In one embodiment, the water-tight connector assembly is fixed to the cabin wall of the underwater structure by a base.

[0019] In one embodiment, the base is welded to the outer cabin wall of the underwater structure, and the base flange surface of the base is provided with a threaded hole; the switching socket flange surface of the switching socket is provided with a through hole corresponding to the base flange surface; and the base flange surface and the switching socket flange surface are fixed by screws.

[0020] In one of the embodiments, the outer wall of the adapter socket is circumferentially provided with a plurality of circumferential sealing rings, and the flange surface of the adapter socket is provided with an axial sealing ring; the circumferential sealing rings are extruded and sealed between the outer wall of the adapter socket and the inner wall of the base; the axial sealing ring is extruded and sealed between the flange surface of the adapter socket and the flange surface of the base; the circumferential sealing ring and the axial sealing ring together realize the watertight connection of the watertight connector assembly and the bulkhead of the underwater structure.

[0021] In one of the embodiments, the contact surface of the signal adapter and the underwater structure is additionally provided with a buffer structure for isolating the underwater explosion impact load.

[0022] In one of the embodiments, the outer and inner watertight connector cables are both two-optical-two-electric structures, two single-mode optical fibers are used to transmit optical signals, and two wires are used to supply power to the signal adapter; one of the two single-mode optical fibers is the main path, and the other is the standby path.

[0023] In one of the embodiments, the outer and inner watertight connectors adopt a steel shell, and a vulcanized rubber for sealing is arranged at the tail of the shell; the outer and inner watertight connector cables are vulcanized cables, which are integrally sealed with the vulcanized rubber, thereby realizing stable transmission under high hydrostatic pressure and underwater explosion impact load.

[0024] In one of the embodiments, the signal adapter sequentially includes an analog signal input circuit, a front-end acquisition circuit, an amplification circuit, a filter circuit, an ADC conversion circuit, and an optoelectronic conversion output circuit.

[0025] The data collector sequentially includes an optoelectronic conversion input circuit, a demodulation circuit, a data uploading and control circuit, a network communication circuit, and an RJ45 output circuit interface.

[0026] On the other hand, the application also provides a measurement method for dynamic response parameters of deep-water impact explosion tests, which uses the above measurement system and includes the following steps:

[0027] Step one, arranging the sensor inside the underwater structure and connecting the signal adapter through the sensor signal shielding cable;

[0028] Step two, installing the watertight connector assembly on the bulkhead of the underwater structure, connecting the signal adapter through the inner watertight connector cable, and connecting the data collector through the outer watertight connector cable;

[0029] Step three, converting the analog electrical signals collected by the sensor into optical signals through the signal adapter, and transmitting the optical signals to the data collector through the watertight connector assembly;

[0030] Step four, the data collector demodulates the optical signal into a digital signal, transmits it to the computer through a six category network cable, and analyzes and stores it.

[0031] In one of the embodiments, the signal adapter performs the following processing flow in step three:

[0032] After amplification, filtering, and ADC conversion of the multi-channel sensor signals, a single optical signal is output through photoelectric conversion.

[0033] The above-mentioned measuring system and method for dynamic response parameters of deep water impact explosion test abandon traditional electrical connectors and adopt a split type water-tight plug-in assembly, which fundamentally eliminates the vibration interference of electrical contacts caused by underwater explosion shock waves, ensuring signal transmission without electromagnetic interference.

[0034] The outer water-tight plug and the inner water-tight plug adopt high-strength steel shells to resist physical damage from explosion shock waves; the tail of the shell is configured with vulcanized rubber for sealing and is integrated with the vulcanized cable to achieve stable transmission under high hydrostatic pressure and underwater explosion impact load; in addition, the circumferential sealing ring and the axial sealing ring of the adapter socket cooperate to form a sealing interface between the flange surface of the adapter socket and the flange surface of the base, resisting deep water high pressure penetration.

[0035] In addition, the data collector and the computer end of the present application are placed on the water surface platform, so that even if the structure sinks, real-time data can be returned through the optical fiber, solving the risk of data loss of built-in storage devices. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1 The system composition framework of the present application is shown.

[0037] Fig. 2 The specific structure diagram of the water-tight plug-in assembly of the present application is shown.

[0038] Fig. 3 The principle diagram of the measuring system of the present application is shown.

[0039] Among them: 100, water-tight plug-in assembly;

[0040] 1, computer end; 2, data collector; 3, outer water-tight plug; 4, adapter socket; 5, inner water-tight plug; 6, signal adapter; 7, sensor; 8, underwater structure; 9, base;

[0041] 201, photoelectric conversion input circuit, 202, demodulation circuit; 203, data upload and control circuit; 204, network communication circuit; 205, RJ45 output circuit interface;

[0042] 601, analog signal input circuit; 602, front-end acquisition circuit; 603, amplification circuit; 604, filter circuit; 605, ADC conversion circuit; 606, photoelectric conversion output circuit;

[0043] 1101, Category 6 network cable; 1102, outer water-tight plug-in cable; 1103, inner water-tight plug-in cable; 1104, sensor signal shielding cable. DETAILED DESCRIPTION

[0044] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated to cover all such modifications as fall within the scope of the application. It is to be understood that the application is not limited in its application to the details set forth in the description below.

[0045] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0047] In the present application, unless specifically defined and limited otherwise, if there is a description of "mounting", "connection", "connecting", "fixing" and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless specifically defined and limited otherwise, if there is a description of "mounting", "connection", "connecting", "fixing" and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0050] Referring to Figs. 1-3 , a schematic diagram of a measurement system for dynamic response parameters of deep water impact explosion test in an embodiment of the present application is shown.

[0051] The present application provides a measurement system for dynamic response parameters of deep water impact explosion test, comprising:

[0052] The computer terminal 1 is located on the water surface platform and receives data through the six category network cable 1101;

[0053] The data collector 2 is located on the water surface platform and is connected to the water-tight connector assembly 100 through the outside water-tight connector cable 1102;

[0054] The water-tight connector assembly 100 is fixed to the bulkhead of the underwater structure 8 and comprises an external water-tight connector 3, an adapter socket 4 and an internal water-tight connector 5;

[0055] The signal adapter 6 is placed inside the underwater structure 8 and is connected to the inner watertight connector 5 via the inner watertight connector cable 1103.

[0056] Sensor 7 is connected to signal adapter 6 via sensor signal shielding cable 1104.

[0057] It is understandable that sensor 7 can be multiple types of sensors, and signal adapter 6 converts the analog electrical signals from multiple sensors into a single optical signal.

[0058] In some embodiments, the signal flow is as follows: analog electrical signal collected by sensor 7 → signal adapter 6 (converted into optical signal) → watertight connector assembly 100 → data acquisition unit 2 (demodulated into digital signal) → computer terminal 1.

[0059] Combination Figs. 1-2 As shown, in some embodiments, the watertight connector assembly 100 is welded to the outer bulkhead of the underwater structure 8 via a base 9;

[0060] Furthermore, the base flange face of the base 9 is provided with threaded holes, and the adapter flange face of the adapter socket 4 is provided with through holes corresponding to the base flange face; the two are fixed by screws.

[0061] The outer wall of the adapter socket 4 is equipped with multiple circumferential sealing rings, which compress and seal between the adapter socket 4 and the inner wall of the base 9; and an axial sealing ring is equipped on the flange face of the adapter socket, which compresses and seals between the flange face of the adapter socket and the flange face of the base. Through the synergistic action of the axial sealing ring and the circumferential sealing ring, watertightness is achieved.

[0062] In some embodiments, the outer watertight connector 3 and the inner watertight connector 5 are made of steel housings and are equipped with vulcanized rubber at the tail. The outer watertight connector cable 1102 and the inner watertight connector cable 1103 are vulcanized cables, which are integrated with the vulcanized rubber of the connectors to resist deep water pressure and explosive impact.

[0063] In some embodiments, both the outer watertight connector cable 1102 and the inner watertight connector cable 1103 are two-optical-two-electrical structures—two single-mode optical fibers (primary / backup) transmit optical signals, and two wires power the signal adapter 6.

[0064] like Fig. 3 As shown, in some embodiments, the signal adapter 6 has a buffer structure added to the contact surface with the underwater structure 8 to isolate the underwater explosion impact load; for example, the buffer structure can be a rubber pad layer.

[0065] Furthermore, the internal circuit flow of the signal adapter 6 is as follows:

[0066] Analog signal input circuit 601→ front-end acquisition circuit 602→ amplification circuit 603→ filter circuit 604→ ADC conversion circuit 605→ photoelectric conversion output circuit 606;

[0067] The signal adapter 6 is used to convert the multi-channel sensor signals into single-channel optical signals.

[0068] In some embodiments, the sensor 7 is connected to the signal adapter 6 through a shielded cable 1104 to suppress electromagnetic interference.

[0069] As shown in Fig. 3 In some embodiments, the internal circuit flow of the data collector 2 is as follows:

[0070] Photoelectric conversion input circuit 201→ demodulation circuit 202→ data upload and control circuit 203→ network communication circuit 204→ RJ45 output circuit interface 205.

[0071] Based on the data collector 2, the optical signal is demodulated into a digital signal and uploaded to the computer end 1 for storage and analysis through a category 6 network cable 1101.

[0072] In other embodiments, the present application also provides a method for measuring dynamic response parameters of deep water impact explosion test, including the following processes:

[0073] The sensor 7 is fixed inside the underwater structure 8, and the signal adapter 6 is connected through a shielded cable 1104;

[0074] The base 9 is welded to the bulkhead, and the adapter socket 4 is fixed to the base 9 through a sealing ring and a screw;

[0075] The inner water-tight connector 5 is connected to the signal adapter 6 through a cable 1103, and the outer water-tight connector 3 is connected to the data collector 2 through a cable 1102;

[0076] The sensor 7 analog signal is converted into an optical signal through the signal adapter 6 (amplification, filtering, ADC conversion, and photoelectric conversion);

[0077] The optical signal is transmitted to the data collector 2 through the water-tight connector assembly 100;

[0078] The data collector 2 demodulates the optical signal into a digital signal, which is uploaded to the computer end 1 for processing through the network cable 1101.

[0079] In summary, the optical fiber transmission of the application replaces the electrical connector, eliminating the vibration interference of the contact caused by underwater explosion; at the same time, the steel shell and the integrated design of the vulcanized rubber at the tail of the shell and the vulcanized cable resist deep water high pressure and impact load; in addition, the application also ensures the watertightness of the bulkhead based on the synergistic effect of the circumferential sealing ring and the axial sealing ring; finally, the data collector 2 of the application and the computer terminal 1 are placed on the water surface, even if the underwater structure 8 sinks, the test data can still be transmitted in real time.

[0080] The technical features of the above-mentioned embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0081] The above-mentioned embodiments only express several implementation manners of the application, the description is more specific and detailed, but it should not be understood as the limitation of the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which all belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A measurement system for dynamic response parameters in deep-water impact explosion tests, characterized in that, include: Computer terminal (1), data acquisition unit (2), watertight connector assembly (100), and signal adapter (6) and sensor (7) arranged inside the underwater structure (8); The watertight connector assembly (100) is a split structure and is fixedly installed on the bulkhead of the underwater structure (8). The watertight connector assembly (100) includes an external watertight connector plug (3) and an internal watertight connector plug (5) that are matched by an adapter socket (4). The inner watertight connector (5) is connected to the optical port and power interface of the signal adapter (6) via the inner watertight connector cable (1103), and the outer watertight connector (3) is connected to the optical port and power drive interface of the data acquisition unit (2) via the outer watertight connector cable (1102). The signal adapter (6) is connected to the multi-channel sensor (7) through the sensor signal shielded cable (1104). The signal adapter (6) converts the analog electrical signal of the multi-channel sensor (7) into a single optical signal and transmits it to the data acquisition unit (2) through the watertight connector assembly (100). The data acquisition unit (2) demodulates the received single-channel optical signal into a digital signal and transmits it to the computer (1) via a Category 6 network cable (1101).

2. The measurement system for dynamic response parameters of deep-water impact explosion tests according to claim 1, characterized in that, The watertight connector assembly (100) is fixed to the bulkhead of the underwater structure (8) via a base (9).

3. The measurement system for dynamic response parameters of deep-water impact explosion tests according to claim 2, characterized in that, The base (9) is welded to the outer wall of the underwater structure (8), and the base flange surface of the base (9) is provided with threaded holes; The adapter socket (4) has a through hole on its adapter socket flange surface that corresponds to the base flange surface; The base flange face and the adapter socket flange face are fixed together by screws.

4. The measurement system for dynamic response parameters of deep-water impact explosion tests according to claim 3, characterized in that, The outer wall of the adapter socket (4) is provided with multiple circumferential sealing rings, and the flange surface of the adapter socket is provided with an axial sealing ring. The circumferential sealing ring is squeezed and sealed between the outer wall of the adapter socket (4) and the inner wall of the base (9); The axial sealing ring is squeezed and sealed between the adapter flange face and the base flange face; The watertight connection between the watertight connector assembly (100) and the underwater structure (8) is achieved through the circumferential sealing ring and the axial sealing ring.

5. The measurement system for dynamic response parameters of deep-water impact explosion tests according to claim 1, characterized in that, A buffer structure is added to the contact surface between the signal adapter (6) and the underwater structure (8) to isolate the underwater explosion impact load.

6. The measurement system for dynamic response parameters of deep-water impact explosion tests according to claim 1, characterized in that, Both the outer watertight connector cable (1102) and the inner watertight connector cable (1103) are two-optical-two-electric structures, transmitting optical signals through two single-mode optical fibers and supplying power to the signal adapter (6) through two wires. Of the two single-mode optical fibers, one is the primary path and the other is the backup path.

7. The measurement system for dynamic response parameters of deep-water impact explosion tests according to claim 1, characterized in that, The external watertight connector (3) and the internal watertight connector (5) are made of steel housings and are equipped with vulcanized rubber for sealing at the tail of the housings. The outer watertight connector cable (1102) and the inner watertight connector cable (1103) are vulcanized cables, which are integrated with the vulcanized rubber of the connector to achieve stable transmission under high hydrostatic pressure and underwater explosion impact load.

8. The measurement system for dynamic response parameters of deep-water impact explosion tests according to claim 1, characterized in that, The signal adapter (6) includes, in sequence: an analog signal input circuit (601), a front-end acquisition circuit (602), an amplifier circuit (603), a filter circuit (604), an ADC conversion circuit (605), and a photoelectric conversion output circuit (606); The data acquisition unit (2) includes, in sequence: photoelectric conversion input circuit (201), demodulation circuit (202), data upload and control circuit (203), network communication circuit (204) and RJ45 output circuit interface (205).

9. A method for measuring dynamic response parameters in deep-water impact explosion tests, employing the measurement system described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Place the sensor (7) inside the underwater structure (8) and connect it to the signal adapter (6) through the sensor signal shielded cable (1104); Step 2: Install the watertight connector assembly (100) on the wall of the underwater structure. The inner watertight connector (5) is connected to the signal adapter (6) through the inner watertight connector cable (1103), and the outer watertight connector (3) is connected to the data acquisition unit (2) through the outer watertight connector cable (1102). Step 3: The analog electrical signal collected by the sensor (7) is converted into an optical signal by the signal adapter (6) and transmitted to the data acquisition unit (2) through the watertight connector assembly (100); Step 4: The data acquisition unit (2) demodulates the optical signal into a digital signal and uploads it to the computer (1) via a Category 6 network cable (1101) for analysis and storage.

10. The method for measuring dynamic response parameters in deep-water impact explosion tests according to claim 9, characterized in that, In step three, the signal adapter (6) performs the following processing flow: After amplifying, filtering, and ADC converting the signals from multiple sensors, a single optical signal is output through photoelectric conversion.

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