Water tightness detection device and method

Abstract

The invention provides a water tightness detection device and method which can be applied to the technical field of detection. The water tightness detection device comprises a detection module which comprises sensing circuit boards configured corresponding to at least one non-sealed end of the underwater equipment, the shape of each sensing circuit board is matched with the shape of the non-sealed end, and each sensing circuit board comprises a detection layer and a transmission layer, the sensing circuit board is configured to output a first electric signal through the transmission layer under the condition that the detection layer detects water; the conversion module comprises a photoelectric coupler, the photoelectric coupler comprises photoelectric coupling units corresponding to the at least one sensing circuit board, the photoelectric coupling units are configured to respond to the first electric signals and output second electric signals, and the second electric signals are used for indicating water seepage of the non-sealed ends corresponding to the sensing circuit boards; and the processing module is configured to output alarm information according to the second electric signal.

Description

Technical Field

[0001] At least one embodiment of the present invention relates to the field of detection technology, and specifically to a watertightness detection device and method. Background Art

[0002] The tightness of underwater equipment's cabins relies on the meticulous design and precise installation of structural components. However, even with a sealed enclosure, water seepage can still occur, potentially causing malfunctions in the internal electrical equipment. Therefore, to ensure the safe operation of underwater equipment, watertightness testing is essential.

[0003] During the process of implementing the present invention, it was found that the detection sensitivity and accuracy of the watertightness detection method were relatively low. Summary of the Invention

[0004] In view of the above problems, the present invention provides a watertightness detection device and method that improve the sensitivity and accuracy of watertightness detection, which can be applied to watertightness detection of various underwater equipment.

[0005] According to a first aspect of the present invention, there is provided a watertightness detection device, comprising: a detection module, comprising a sensor circuit board configured to correspond to at least one non-sealed end of an underwater device, the shape of the sensor circuit board matching the shape of the non-sealed end, the sensor circuit board comprising a detection layer and a transmission layer, the sensor circuit board being configured to output a first electrical signal via the transmission layer when the detection layer detects water; a conversion module, comprising a photoelectric coupler, the photoelectric coupler comprising a photoelectric coupling unit corresponding to at least one of the sensor circuit boards, the photoelectric coupling unit being configured to output a second electrical signal in response to the first electrical signal, wherein the second electrical signal is used to indicate water seepage at the non-sealed end corresponding to the sensor circuit board; and a processing module, configured to output an alarm message based on the second electrical signal.

[0006] According to an embodiment of the present invention, the detection layer is provided with a first detection electrode and a second detection electrode, the first detection electrode is connected to the transmission layer via a first lead-out hole, and the second detection electrode is connected to the transmission layer via a second lead-out hole; when the first detection electrode and the second detection electrode are connected by water, the sensor circuit board is configured so that the detection layer outputs a first electrical signal via the transmission layer.

[0007] According to an embodiment of the present invention, the shape of the above-mentioned non-sealed end is annular, the above-mentioned first detection electrode is a first detection ring formed by wiring on a printed circuit board, and the above-mentioned second detection electrode is a second detection ring formed by wiring on a printed circuit board, and the wiring of the above-mentioned first detection ring extends to the above-mentioned first lead-out hole of the above-mentioned transmission layer through the notch area provided in the above-mentioned second detection ring, and the wiring of the above-mentioned second detection ring extends to the above-mentioned second lead-out hole of the above-mentioned transmission layer.

[0008] According to an embodiment of the present invention, the first detection ring and the second detection ring have the same ring width, and / or the first detection ring and the second detection ring are spaced apart by a first predetermined distance.

[0009] According to an embodiment of the present invention, the detection layer faces the non-sealed end, the transmission layer faces the internal accommodation space of the underwater equipment, and a sealing strip is arranged between the transmission layer and the mounting surface of the sensor circuit board.

[0010] According to an embodiment of the present invention, the above-mentioned photoelectric coupling unit includes: a light-emitting element, including a first electrode connected to the above-mentioned first detection electrode and a second electrode connected to the first power supply via a first resistor, configured to convert the above-mentioned first electrical signal into an optical signal and output the above-mentioned optical signal; and a receiving element, including an output end connected to the above-mentioned processing module, configured to convert the above-mentioned optical signal into the above-mentioned second electrical signal and output the above-mentioned second electrical signal.

[0011] According to an embodiment of the present invention, the above-mentioned receiving element includes: a third pole connected to a second power supply; a fourth pole connected to a ground terminal of the second power supply via a second resistor; and a photosensitive area configured to control the above-mentioned third pole and the above-mentioned fourth pole to be conductive in response to the above-mentioned light signal, and output the above-mentioned second electrical signal.

[0012] According to an embodiment of the present invention, the output end of the above-mentioned first detection electrode remains disconnected from the first power supply ground terminal when there is no water leakage. In the case of water leakage, the output end of the above-mentioned second detection electrode connects the above-mentioned first detection electrode and the above-mentioned second detection electrode through water, and forms a detection circuit with the first power supply ground terminal through the third resistor.

[0013] According to an embodiment of the present invention, the above-mentioned sensor circuit board is configured to output a third electrical signal via the above-mentioned transmission layer when the above-mentioned detection layer does not detect water; and the above-mentioned photoelectric coupling unit is further configured to output a fourth electrical signal in response to the above-mentioned third electrical signal, wherein the above-mentioned fourth electrical signal is used to indicate that the non-sealed end corresponding to the above-mentioned sensor circuit board has not leaked water.

[0014] According to another aspect of the present invention, a watertightness detection method is provided, comprising: for any sensor circuit board included in a detection module and configured to correspond to at least one non-sealed end of an underwater device, the sensor circuit board outputs a first electrical signal via a transmission layer of the sensor circuit board when water is detected by the detection layer of the sensor circuit board; for any photoelectric coupling unit included in a photoelectric coupler in a conversion module and corresponding to at least one of the sensor circuit boards, the photoelectric coupling unit outputs a second electrical signal in response to the first electrical signal, wherein the second electrical signal is used to indicate water seepage at the non-sealed end corresponding to the sensor circuit board; and a processing module outputs an alarm message based on the second electrical signal.

[0015] According to an embodiment of the present invention, since the first electrical signal is directly triggered after water contacts the detection layer, the response speed is improved, thereby improving the detection sensitivity. Since the shape of the sensor circuit board matches the shape of the non-sealed end, the detection layer of the sensor circuit board can cover the potential water seepage area, thereby improving the comprehensiveness of the detection, reducing the probability of missed detection, and thus improving the detection accuracy. Since the photoelectric coupling unit can isolate the sensor circuit board and the processing module, the probability of the underwater equipment's own electrical noise falsely triggering the alarm is reduced, thereby reducing the false alarm rate. By converting the first electrical signal into a second electrical signal through the photoelectric coupling unit, the electrical noise of the sensor circuit board can be isolated, and the quality of the second electrical signal is improved, thereby improving the detection accuracy. The non-sealed end has a corresponding sensor circuit board and photoelectric coupling unit, supports multi-point synchronous detection, reduces the probability of crosstalk, and improves the positioning accuracy of the water seepage position, thereby improving the detection accuracy. In addition, since the second electrical signal can be a uniform level signal, it can be directly connected to the Internet of Things platform and is compatible with the alarm system of the underwater equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above contents and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0017] Figure 1 A schematic diagram of a watertightness detection device according to an embodiment of the present invention is shown.

[0018] Figure 2 A schematic diagram of a sensor circuit board according to an embodiment of the present invention is shown.

[0019] Figure 3 A schematic diagram of a conversion module according to an embodiment of the present invention is shown.

[0020] Figure 4 FIG. 4 is a schematic diagram showing a conversion module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.

[0022] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "comprise", "include", etc. used herein indicate the presence of the features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0023] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0024] When expressions such as "at least one of A, B, and C, etc." are used, they should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0025] Regarding watertightness detection, watertightness detection methods can include resistive watertightness detection methods and capacitive watertightness detection methods. The resistive watertightness detection method can be implemented using a resistance bridge and a comparator. Since the circuit structure of the resistive watertightness detection method is relatively complex and easily affected by environmental factors and resistance deviation, it leads to differences in the comparison voltage, thereby reducing the detection sensitivity and accuracy. The capacitive watertightness detection method can be implemented using a capacitance-to-digital conversion chip, and has high requirements for the design and installation of the electrodes, and small errors affect the detection accuracy. In addition, the price of capacitance-to-digital conversion chips with higher precision is relatively high, which limits their application. It can be seen that the detection sensitivity and accuracy of the watertightness detection method are low.

[0026] To this end, an embodiment of the present invention provides a watertightness detection device and method, which are described below with reference to the accompanying drawings.

[0027] Figure 1 A schematic diagram of a watertightness detection device according to an embodiment of the present invention is shown.

[0028] like Figure 1 As shown, the watertightness detection device may include a detection module 1 , a conversion module 2 and a processing module 3 .

[0029] According to an embodiment of the present invention, the detection module 1 includes a sensor circuit board 10 configured to correspond to at least one unsealed end 41 of the underwater device 4. The shape of the sensor circuit board 10 matches the shape of the unsealed end 41. The sensor circuit board 10 includes a detection layer 11 and a transmission layer 12. The sensor circuit board 10 is configured to output a first electrical signal via the transmission layer 12 when the detection layer 11 detects water. The conversion module 2 includes a photoelectric coupler 20, which includes a photoelectric coupling unit 21 corresponding to at least one sensor circuit board 10. The photoelectric coupling unit 21 is configured to output a second electrical signal in response to the first electrical signal, wherein the second electrical signal is used to indicate water seepage at the unsealed end 41 corresponding to the sensor circuit board 10. The processing module 3 is configured to output an alarm message based on the second electrical signal.

[0030] In one embodiment, the shape of the underwater device 4 is designed based on its function and usage environment. The shape of the underwater device 4 can be streamlined, spherical, cylindrical, box-shaped, polyhedron, or a combination thereof. The underwater device 4 can be a cylindrical cabin. The underwater device 4 with a cylindrical cabin can include two unsealed ends 41. The detection module 1 can then include two sensor circuit boards 10, each disposed inside the two unsealed ends 41. The underwater device 4 can also be a spherical cabin. The underwater device 4 with a spherical cabin can include at least one unsealed end 41, for example, two, six, etc.

[0031] In one embodiment, the shape of the non-sealed end 41 can be circular, and the shape of the sensor circuit board 10 can be designed to be circular or annular. The annular sensor circuit board 10 is convenient for accommodating instruments and equipment inside the underwater device 41.

[0032] According to an embodiment of the present invention, the non-sealed end 41 refers to a port of the underwater equipment 4 that may still leak water after sealing measures have been taken.

[0033] In one embodiment, the detection layer 11 may include two output ports, for example, a first output port and a second output port. In the absence of water seepage, the two output ports of the detection layer 11 are in an open circuit state. In the event of water seepage, water forms a conductor between the two output ports of the detection layer 11, causing the two output ports of the detection layer 11 to short-circuit from an open circuit state. For example, the first output port is grounded, and the second output port is connected to the conversion module 2 via the transmission layer 12. In the absence of water seepage, the two output ports of the detection layer 11 are in an open circuit state, and the second output port is suspended. In the event of water seepage, both output ports of the detection layer 11 are grounded, and the second output port outputs a first electrical signal (a ground signal) to the conversion module 2.

[0034] In one embodiment, when water seepage occurs, the photoelectric coupling unit 21 outputs a second electrical signal in response to the first electrical signal (ground signal) based on the photoelectric coupling effect.

[0035] In one embodiment, when water seepage occurs, the processing module 3 can output an alarm message based on the second electrical signal through a comparator, a logic circuit, or the like. The alarm message can be an acoustic signal, an optical signal, or a voltage signal, which is used to perform subsequent protective operations such as powering off instrument components.

[0036] According to an embodiment of the present invention, since the first electrical signal is directly triggered after water contacts the detection layer, the response speed is improved, thereby improving the detection sensitivity. Since the shape of the sensor circuit board matches the shape of the non-sealed end, the detection layer of the sensor circuit board can cover the potential water seepage area, thereby improving the comprehensiveness of the detection, reducing the probability of missed detection, and thus improving the detection accuracy. Since the photoelectric coupling unit can isolate the sensor circuit board and the processing module, the probability of the underwater equipment's own electrical noise falsely triggering the alarm is reduced, thereby reducing the false alarm rate. By converting the first electrical signal into a second electrical signal through the photoelectric coupling unit, the electrical noise of the sensor circuit board can be isolated, and the quality of the second electrical signal is improved, thereby improving the detection accuracy. The non-sealed end has a corresponding sensor circuit board and photoelectric coupling unit, supports multi-point synchronous detection, reduces the probability of crosstalk, and improves the positioning accuracy of the water seepage position, thereby improving the detection accuracy. In addition, since the second electrical signal can be a uniform level signal, it can be directly connected to the Internet of Things platform and is compatible with the alarm system of the underwater equipment.

[0037] Figure 2 A schematic diagram of a sensor circuit board according to an embodiment of the present invention is shown.

[0038] like Figure 2As shown, according to an embodiment of the present invention, the detection layer 11 is provided with a first detection electrode 111 and a second detection electrode 112. The first detection electrode 111 is connected to the transmission layer 12 via a first lead-out hole 113, and the second detection electrode 112 is connected to the transmission layer 12 via a second lead-out hole 114. When the first detection electrode 111 and the second detection electrode 112 are electrically connected through water, the sensor circuit board 10 is configured so that the detection layer 11 outputs a first electrical signal via the transmission layer 12.

[0039] like Figure 1 and Figure 2 As shown, in one embodiment, a sealing strip is provided between the detection layer 11 and the transmission layer 12 of the sensor circuit board 10. In the event of water seepage at the unsealed end 41, the water will first flow through the detection layer 11. The first lead-out hole 113 and the second lead-out hole 114 of the sensor circuit board 10 can be vias of a PCB (Printed Circuit Board) or solder joints of the transmission layer 12 to input the first electrical signal to the conversion module 2 via a signal transmission line.

[0040] According to an embodiment of the present invention, the first lead-out hole and the second lead-out hole are provided on the transmission layer, which can effectively transmit the first electrical signal. The isolation of the detection layer and the transmission layer can clearly divide the functional areas.

[0041] like Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, the shape of the non-sealed end 41 is annular, the first detection electrode 111 is a first detection ring formed by wiring on the printed circuit board, and the second detection electrode 112 is a second detection ring formed by wiring on the printed circuit board. The wiring of the first detection ring extends to the first lead-out hole 113 of the transmission layer 12 through the notch area set in the second detection ring, and the wiring of the second detection ring extends to the second lead-out hole 114 of the transmission layer 12.

[0042] In one embodiment, the circuit board of the sensor circuit board 10 can adopt a two-layer PCB printed circuit board process, and the wiring of the two-layer circuit board is copper-clad and the surface is tin-plated to ensure good conductive performance.

[0043] According to an embodiment of the present invention, the first detection ring and the second detection ring have the same ring width, and / or the first detection ring and the second detection ring are spaced apart by a first predetermined distance.

[0044] According to an embodiment of the present invention, the detection layer 11 faces the non-sealed end 41 , the transmission layer 12 faces the internal accommodation space of the underwater device 4 , and a sealing strip is configured between the transmission layer 12 and the mounting surface of the sensor circuit board 10 .

[0045] Figure 3 A schematic diagram showing a conversion module according to an embodiment of the present invention

[0046] like Figure 3 As shown, the photoelectric coupler 20 includes at least one photoelectric coupling unit. The photoelectric coupling unit 21 includes a light emitting element and a receiving element.

[0047] According to an embodiment of the present invention, the light emitting element includes a first electrode connected to the first detection electrode and a second electrode connected to the first power supply P1 via a first resistor R1. The light emitting element is configured to convert the first electrical signal into an optical signal and output the optical signal. The receiving element includes an output terminal connected to the processing module, and the receiving element is configured to convert the optical signal into a second electrical signal and output the second electrical signal.

[0048] like Figure 3 As shown, according to an embodiment of the present invention, the receiving element includes a third electrode connected to the second power supply P2; a fourth electrode connected to the second power supply ground terminal P2-GND via a second resistor R2; and a photosensitive area, configured to control the third electrode and the fourth electrode to be conductive in response to the optical signal and output the second electrical signal.

[0049] According to an embodiment of the present invention, the processing module can instruct the instrument control center inside the underwater equipment to implement corresponding protective measures through a preset alarm program based on the at least one second electrical signal.

[0050] In one embodiment, the processing module may include a processor, such as an ARM (Advanced RISC Machine), an FPGA (Field Programmable Gate Array), and the like.

[0051] Combine Figure 1-Figure 3 In the absence of water seepage, the first detection electrode 111 and the second detection electrode 112 are disconnected, the detection layer 11 outputs no signal, the photoelectric coupler 20 is non-conductive, and the conversion module 2 outputs a low-level signal. Processing module 3 receives the low-level signal and does not output an alarm. In the presence of water seepage, the first detection electrode 111 and the second detection electrode 112 are conductive, the detection layer 11 outputs a first electrical signal (a ground signal), and the photoelectric coupler 20 responds to the first electrical signal (a ground signal) by outputting a high-level signal, i.e., a second electrical signal, to indicate water seepage at the non-sealed end 41 corresponding to the sensor circuit board 10. Based on the second electrical signal, processing module 3 outputs an alarm and implements appropriate protective measures.

[0052] like Figure 2 and Figure 3As shown, according to an embodiment of the present invention, the output end of the first detection electrode 111 remains disconnected from the first power ground terminal P1-GND when there is no water leakage. When there is water leakage, the output end of the first detection electrode 111 connects the first detection electrode 111 and the second detection electrode 112 through water, and forms a detection loop with the first power ground terminal P1-GND through the third resistor.

[0053] According to an embodiment of the present invention, the third resistor is a water resistor. The first detection electrode 111 and the second detection electrode 112 are bare wires. In the event of water seepage, the output end of the first detection electrode 111 forms a detection loop with the first power ground terminal P1-GND through the water resistor.

[0054] According to an embodiment of the present invention, the first power supply P1, the first resistor R1, the light-emitting element, the first detection electrode 111, the water resistance, the second detection electrode 112, and the first power ground terminal P1-GND form a detection circuit. In the event of water seepage, the light-emitting element is illuminated, and in response to the light signal, the third and fourth electrodes are turned on. The second power supply P2, the photosensitive area, the second resistor R2, and the second power ground terminal P2-GND form a circuit, outputting a second electrical signal indicating the occurrence of water seepage.

[0055] According to an embodiment of the present invention, a first power supply and a first power ground terminal are independently configured for the light-emitting element, and a second power supply and a second power ground terminal are independently configured for the receiving element, so that the light-emitting element and the receiving element are completely electrically isolated, which can protect the back-end circuit of the optocoupler and can also make the transmission paths of the first electrical signal and the second electrical signal completely independent, thereby improving the quality and reliability of signal transmission.

[0056] According to an embodiment of the present invention, the sensor circuit board 10 is configured to output a third electrical signal via the transmission layer 12 when the detection layer 11 does not detect water; and the photoelectric coupling unit 21 is further configured to output a fourth electrical signal in response to the third electrical signal, wherein the fourth electrical signal is used to indicate that the non-sealed end 41 corresponding to the sensor circuit board 10 has not leaked water.

[0057] Figure 4 FIG. 4 is a schematic diagram showing a conversion module according to an embodiment of the present invention.

[0058] like Figure 4As shown, in one embodiment, the underwater device can be a cylinder, and the side wall shell of the underwater device can be an integrated design. The underwater device can include two non-sealed ends, such as a top cover and a bottom cover. The top cover and the bottom cover are structurally sealed, for example, by means of parts matching and sealing strips, to ensure the watertightness of the underwater device. The possible water leakage surfaces of the underwater device are concentrated at the edges of the top cover and the bottom cover. A ring-shaped sensor circuit board that matches the shape of the top cover and the bottom cover can be provided. The shape and size of the circuit board of the sensor circuit board are closely fitted to the inner wall of the underwater device. The detection layer of the sensor circuit board is as close to the top cover and the bottom cover as possible, ensuring that the watertightness can be detected with high sensitivity in the event of a slight amount of water leakage in the top cover or the bottom cover.

[0059] like Figure 4 As shown, in one embodiment, the detection module of the watertightness detection device may include two sensor circuit boards. For example, a top cover sensor circuit board and a bottom cover sensor circuit board are respectively provided on the top cover and the bottom cover of the underwater equipment. The top cover sensor circuit board includes a first detection electrode of the top cover, for example, an outer ring of the top cover. The top cover sensor circuit board includes a second detection electrode of the top cover, for example, an inner ring of the top cover (not shown in the figure). The bottom cover sensor circuit board includes a first detection electrode of the bottom cover, for example, an outer ring of the bottom cover. The bottom cover sensor circuit board includes a second detection electrode of the bottom cover, for example, an inner ring of the bottom cover (not shown in the figure). The inner ring of the top cover and the inner ring of the bottom cover are connected to the ground terminal of the first power supply.

[0060] In one embodiment, the top cover inner ring, top cover outer ring, bottom cover inner ring, and bottom cover outer ring can be configured as bare wire with a thickness of 0.5 mm, with a spacing of 0.5 mm between the top cover inner ring and the top cover outer ring. The spacing between the top cover outer ring and the edge of the circuit board of the detection layer of the top cover sensor circuit board is 0.1 mm. The spacing between the bottom cover inner ring and the bottom cover outer ring is 0.5 mm. The spacing between the bottom cover outer ring and the edge of the circuit board of the detection layer of the bottom cover sensor circuit board is 0.1 mm.

[0061] like Figure 4 As shown, in one embodiment, the conversion module includes a photocoupler 20, which may include two photocoupler units, for example, a first photocoupler unit and a second photocoupler unit. The first electrode of the first photocoupler unit is connected to the outer ring of the top cover, the second electrode of the first photocoupler unit is connected to the first power supply P1 via a first resistor R1, the third electrode of the first photocoupler unit is connected to the second power supply P2, and the fourth electrode of the first photocoupler unit is connected to the second power supply ground terminal P2-GND via a second resistor R2. The first electrode of the second photocoupler unit is connected to the outer ring of the bottom cover, the second electrode of the second photocoupler unit is connected to the first power supply P1 via a fourth resistor R4, the third electrode of the second photocoupler unit is connected to the second power supply P2, and the fourth electrode of the second photocoupler unit is connected to the second power supply ground terminal P2-GND via a fifth resistor R5.

[0062] like Figure 4 As shown, in one embodiment, when water seepage occurs on the top cover of the underwater equipment, the top cover first detection electrode and the top cover second detection electrode of the top cover circuit board are conductive, the outer ring of the top cover is connected to the first power supply ground terminal, the first pole of the first photoelectric coupling unit is connected to the first power supply ground terminal, and the output end of the first photoelectric coupling unit outputs a top cover water seepage signal.

[0063] like Figure 4 As shown, in one embodiment, when water seepage occurs in the bottom cover of the underwater equipment, the bottom cover first detection electrode and the bottom cover second detection electrode of the bottom cover circuit board are conductive, the outer ring of the bottom cover is connected to the first power supply ground terminal, the first pole of the second photoelectric coupling unit is connected to the first power supply ground terminal, and the output end of the second photoelectric coupling unit outputs a bottom cover water seepage signal.

[0064] The present invention also provides a watertightness detection method, comprising: for any sensor circuit board included in the detection module and configured to correspond to at least one non-sealed end of the underwater equipment, the sensor circuit board outputs a first electrical signal via the transmission layer of the sensor circuit board when the detection layer of the sensor circuit board detects water; for any photoelectric coupling unit included in the photoelectric coupler in the conversion module and corresponding to at least one sensor circuit board, the photoelectric coupling unit outputs a second electrical signal in response to the first electrical signal, wherein the second electrical signal is used to indicate water seepage at the non-sealed end corresponding to the sensor circuit board; and the processing module outputs an alarm message based on the second electrical signal.

[0065] It will be understood by those skilled in the art that the features described in the various embodiments of the present invention may be combined and / or coupled in various ways, even if such combinations or couplings are not explicitly described in the present invention. In particular, the features described in the various embodiments of the present invention may be combined and / or coupled in various ways without departing from the spirit and teachings of the present invention. All such combinations and / or couplings fall within the scope of the present invention.

[0066] The above describes embodiments of the present invention. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although each embodiment has been described separately above, this does not mean that the measures in each embodiment cannot be advantageously used in combination. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A watertightness detection device, characterized in that: include: The detection module includes a sensor circuit board configured to correspond to at least one non-sealed end of the underwater device, the shape of the sensor circuit board matching the shape of the non-sealed end, the sensor circuit board including a detection layer and a transmission layer, and the sensor circuit board is configured to output a first electrical signal via the transmission layer when the detection layer detects water; a conversion module comprising a photoelectric coupler, the photoelectric coupler comprising a photoelectric coupling unit corresponding to each of the at least one sensor circuit boards, the photoelectric coupling unit being configured to output a second electrical signal in response to the first electrical signal, wherein the second electrical signal is used to indicate water seepage at the non-sealed end corresponding to the sensor circuit board; as well as The processing module is configured to output alarm information according to the second electrical signal.

2. The watertightness detection device according to claim 1, characterized in that: The detection layer is provided with a first detection electrode and a second detection electrode, the first detection electrode is connected to the transmission layer via a first lead-out hole, and the second detection electrode is connected to the transmission layer via a second lead-out hole; When the first detection electrode and the second detection electrode are electrically connected through water, the sensor circuit board is configured so that the detection layer outputs a first electrical signal via the transmission layer.

3. The watertightness detection device according to claim 2, characterized in that: The non-sealed end is in the shape of a ring, the first detection electrode is a first detection ring formed by wiring on a printed circuit board, the second detection electrode is a second detection ring formed by wiring on a printed circuit board, the wiring of the first detection ring extends to the first lead-out hole of the transmission layer through a notch area provided in the second detection ring, and the wiring of the second detection ring extends to the second lead-out hole of the transmission layer.

4. The watertightness detection device according to claim 3, characterized in that: The first detection ring and the second detection ring have the same ring width, and / or the first detection ring and the second detection ring are spaced a first predetermined distance apart.

5. The watertightness detection device according to any one of claims 1 to 4, characterized in that: The detection layer faces the non-sealed end, the transmission layer faces the internal accommodation space of the underwater equipment, and a sealing strip is arranged between the transmission layer and the mounting surface of the sensor circuit board.

6. The watertightness detection device according to any one of claims 2 to 4, characterized in that: The photoelectric coupling unit includes: a light emitting element, comprising a first electrode connected to the first detection electrode and a second electrode connected to a first power source via a first resistor, configured to convert the first electrical signal into a light signal and output the light signal; and The receiving element includes an output end connected to the processing module, and is configured to convert the optical signal into the second electrical signal and output the second electrical signal.

7. The watertightness detection device according to claim 6, characterized in that: The receiving element includes: Connect the third pole of the second power supply; a fourth electrode connected to the second power ground terminal via a second resistor; and The photosensitive region is configured to control the third electrode and the fourth electrode to be conductive in response to the light signal, and output the second electrical signal.

8. The watertightness detection device according to claim 6, characterized in that: The output end of the first detection electrode remains disconnected from the first power supply ground terminal when there is no water leakage. When the output end of the second detection electrode is in the case of water leakage, the first detection electrode and the second detection electrode are connected by water, and a detection circuit is formed with the first power supply ground terminal through the third resistor.

9. The watertightness detection device according to any one of claims 1 to 4, characterized in that: The sensing circuit board is configured to output a third electrical signal via the transmission layer if the detection layer does not detect water; and The photoelectric coupling unit is further configured to output a fourth electrical signal in response to the third electrical signal, wherein the fourth electrical signal is used to indicate that the non-sealed end corresponding to the sensor circuit board has not leaked water.

10. A watertightness detection method, characterized in that: include: For any sensor circuit board included in the detection module and configured to correspond to at least one non-sealed end of the underwater device, the sensor circuit board outputs a first electrical signal via the transmission layer of the sensor circuit board when the detection layer of the sensor circuit board detects water; For any of the photoelectric coupling units corresponding to at least one of the sensor circuit boards included in the photoelectric coupler in the conversion module, the photoelectric coupling unit outputs a second electrical signal in response to the first electrical signal, wherein the second electrical signal is used to indicate water seepage at the non-sealed end corresponding to the sensor circuit board; as well as The processing module outputs alarm information according to the second electrical signal.

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