Wading sensor

Abstract

The utility model relates to the technical field of sensors, in particular to a wading sensor, which is characterized in that a base is covered with a casing matched with the base, a resin plate is mounted in the casing, an accommodating cavity is formed between the casing and the resin plate, a PCBA (printed circuit board assembly) is mounted in the accommodating cavity, an anode PIN group and a cathode PIN group are inserted on the resin plate and the PCBA, a terminal is mounted on the casing, and the terminal is connected with the base. One end of the terminal is connected with the positive PIN group and the negative PIN group, and the other end of the terminal is connected with external equipment; a gap is formed between the outer wall of the base and the inner wall of the shell, a water inlet runner is formed between the base and the shell through the gap, an opening is formed in the base, and the water inlet runner is communicated with the interior of the base through the opening, so that the sealing performance is good, the water inlet runner is reasonable in design, and detection delay or misjudgment caused by dust blockage or turbulence interference is solved through the water inlet runners on the two sides; the signal transmission stability is improved, the anti-interference capability is strong, the circuit is not easily subjected to electromagnetic interference or short circuit in a humid environment, and the detection precision and the environmental adaptability are obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a water-related sensor. Background Technology

[0002] Water wading sensors, as key devices for detecting water levels or liquid contact, are widely used in vehicles, industrial equipment, and smart homes. However, existing water wading sensors often suffer from the following problems:

[0003] 1. Traditional sensor housings and bases are simply fitted together (such as by threaded connection or glue). After long-term use, they are prone to seal failure due to thermal expansion and contraction or mechanical vibration, allowing moisture to seep into the interior and damage electronic components (such as PCBA boards). Furthermore, existing sensors rely solely on O-ring seals, which are easily detached under the impact of high-pressure water flow.

[0004] 2. The internal components of the sensor (such as electrodes and circuit boards) lack effective positioning structures and are prone to displacement in a vibration environment, resulting in inaccurate signal detection. Some designs use screws to fix the PCBA board, but this is complicated to install and increases costs.

[0005] 3. The water inlet channel is poorly designed, using a straight-through opening, which is prone to blockage by impurities or interference from turbulence, leading to detection delays or misjudgments. Furthermore, the connection method between the electrodes and external terminals is limited (e.g., welding), making them susceptible to corrosion from prolonged contact with liquids and affecting signal transmission stability.

[0006] 4. The sensor lacks internal insulation design, making the circuit susceptible to electromagnetic interference or short circuit risk in humid environments.

[0007] Therefore, there is an urgent need for a water-based sensor that combines high sealing performance, structural stability, and anti-interference capabilities to address the aforementioned technical deficiencies. Summary of the Invention

[0008] The technical problem to be solved by this utility model is to provide a water wading sensor in order to solve the problems existing in the prior art mentioned above.

[0009] The technical solution adopted by this utility model to solve its technical problem is: a water immersion sensor, including a base and a housing, wherein the base is covered with a housing that cooperates with it, a resin plate is installed inside the housing, and a receiving cavity is formed between the housing and the resin plate. A PCBA board is installed in the receiving cavity, and a positive PIN pin group and a negative PIN pin group are inserted into the resin plate and the PCBA board. A terminal is installed on the housing, one end of the terminal is connected to the positive PIN pin group and the negative PIN pin group, and the other end of the terminal is connected to an external device.

[0010] There is a gap between the outer wall of the base and the inner wall of the shell. A water inlet channel is formed between the base and the shell through this gap. The base has an opening, and the water inlet channel communicates with the interior of the base through the opening.

[0011] Furthermore, the base and the housing are interference fit, the outer edge of the upper opening of the base is provided with a protrusion, and the lower edge of the inner wall of the housing is provided with a groove that matches the protrusion.

[0012] Furthermore, the base includes a column with through holes and a base plate. A reinforcing rib is provided at the connection between the column and the base plate. Screw holes are provided at both ends of the base plate. The top surface of a reinforcing rib contacts the bottom surface of the shell.

[0013] Furthermore, the housing includes a housing body, which has a downwardly extending extension portion, and an outwardly extending socket on the side of the housing body. The bottom surface of the socket has a plurality of first socket holes, and one end pin of the terminal is inserted into the first socket hole.

[0014] Furthermore, an opening is provided on the peripheral wall of the central column in the base, and the extension in the shell covers the opening.

[0015] Furthermore, a tongue is provided on the bottom surface of the extension in the housing, and a second insertion hole is provided on the bottom plate of the base. The tongue is inserted into the second insertion hole to prevent rotation between the housing and the base.

[0016] Furthermore, the inner wall of the housing is provided with several positioning components for positioning the PCBA board.

[0017] Furthermore, the positioning components are a first positioning component, a second positioning component, and a third positioning component. The first positioning component is a stepped positioning component, which includes a base and a stepped portion. The shape of the stepped portion corresponds to the arc-shaped groove on the side of the PCBA board. The second positioning component is an umbrella-shaped component, and the straight surface of the second positioning component contacts the side of the PCBA board. The third positioning component is a protrusion.

[0018] Furthermore, the PCBA board includes a board body, on the surface of which are provided several through holes for the positive and negative PIN groups to pass through. The outer circumferential wall of the board body is provided with an arc-shaped groove that mates with the first positioning member in the housing. The edge of the board body has a straight cut that mates with the second positioning member.

[0019] Furthermore, there is a height H between the bottom surface of the positive electrode PIN needle group and the negative electrode PIN needle group and the top surface of the opening in the base, which is the effective liquid level detection height.

[0020] The beneficial effects of this utility model are: good sealing performance and good structural stability. The water inlet channel is reasonably designed. The water inlet channels on both sides solve the problem of detection delay or misjudgment caused by dust blockage or turbulence interference, improve the stability of signal transmission, and have strong anti-interference ability. The circuit is not easily affected by electromagnetic interference or short circuit in humid environments, which significantly improves the detection accuracy and environmental adaptability. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a utility model Figure 1 A structural diagram from another direction;

[0024] Figure 3 This is an exploded view of this utility model;

[0025] Figure 4 This is a cross-sectional view of the present invention;

[0026] Figure 5 This is a cross-sectional view of the water inlet channel of this utility model;

[0027] Figure 6 This is a structural schematic diagram of the base of this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the shell of this utility model;

[0029] Figure 8 This is a utility model Figure 6 A structural diagram from another direction;

[0030] Figure 9 This is the circuit diagram of this utility model;

[0031] In the diagram: 1. Base, 2. Housing, 3. Protrusion, 4. Groove, 5. Column, 6. Base plate, 7. Reinforcing rib, 8. Screw hole, 9. Opening, 10. Extension, 11. Socket, 12. First socket, 13. Tongue, 14. Second socket, 15. Positioning component, 16. PCBA board, 17. Positive PIN group, 18. Negative PIN group, 19. Through hole, 20. Arc-shaped groove, 21. Straight cut, 22. Resin board, 23. Terminal, 24. Water inlet channel. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0033] like Figures 1-9 The water sensor shown includes a base 1 and a housing 2. The base 1 is covered with the housing 2, which is fitted with it. A resin plate 22 is installed inside the housing 2, forming a cavity between the housing 2 and the resin plate 22. The resin plate 22 provides multiple protections for the PCBA board 16: waterproof sealing; electrical insulation, isolating the positive PIN group 17 and the negative PIN group 18 to prevent short circuits in humid environments; and absorbing mechanical vibration energy through elastic deformation to reduce damage to the components of the cavity caused by water flow impact. The PCBA board 16 is installed in the cavity, and the positive PIN group 17 and the negative PIN group 18 are inserted into the resin plate 22 and the PCBA board 16. The pluggable positive PIN group 17 and the negative PIN group 18 simplify assembly and reduce the risk of corrosion at the solder joints. A terminal 23 is installed on the housing 2. One end of the terminal 23 is connected to the positive PIN group 17 and the negative PIN group 18, and the other end of the terminal 23 is connected to an external device.

[0034] like Figure 5 As shown, there is a gap between the outer wall of the base 1 and the inner wall of the housing 2. A water inlet channel 24 is formed between the base 1 and the housing 2 through this gap. The base 1 is provided with an opening 9. The water inlet channel 24 is connected to the interior of the base 1 through the opening 9, guiding the water flow to enter the detection area inside the base 1 smoothly, reducing turbulence interference. At the same time, the environment under the vehicle chassis is complex. Too much dust on the surface of the PIN needle may cause detection failure. The water flow enters spirally along the water inlet pipes 24 on both sides, which can reduce most of the dust entering, while not affecting the fluid inflow.

[0035] like Figure 4 As shown, there is a height H between the bottom surface of the positive electrode PIN needle group 17 and the negative electrode PIN needle group 18 and the top surface of the opening 9 in the base 1. This height H is the effective liquid level detection height, H1 is the lowest detection liquid level, H2 is the highest detection liquid level, and the height between H2 and H1 is the effective liquid level detection height.

[0036] like Figure 3 As shown, the base 1 and the shell 2 are interference fit. The outer edge of the upper opening of the base 1 is provided with a protrusion 3, and the lower edge of the inner wall of the shell 2 is provided with a groove 4 that matches the protrusion 3. The base 1 and the shell 2 are tightly connected through the interference fit, the interlocking structure of the protrusion 3 and the groove 4, which effectively prevents moisture from seeping in.

[0037] like Figure 6As shown, the base 1 includes a column 5 with a through hole and a base plate 6. A reinforcing rib 7 is provided at the connection between the column 5 and the base plate 6 to improve the structural strength of the base 1 and prevent deformation from affecting the sealing performance. Screw holes 8 are provided at both ends of the base plate 6. The top surface of the reinforcing rib 7 contacts the bottom surface of the shell 2 to limit the shell 2 and support the shell 2.

[0038] like Figures 7-8 As shown, the housing 2 includes a housing body, on which a downwardly extending extension 10 is provided, and an outwardly extending socket 11 is provided on the side of the housing body. The bottom surface of the socket 11 is provided with a plurality of first socket holes 12, and one end pin of the terminal 23 is inserted into the first socket hole 12.

[0039] like Figure 6 As shown, an opening 9 is provided on the peripheral wall of the column 5 in the base 1, and the extension 10 in the shell 2 blocks the opening 9 to prevent large particles of impurities from directly clogging the water inlet channel 24. The water flows gently through the opening 9 into the interior of the base 1.

[0040] like Figure 7 As shown, a tongue 13 is provided on the bottom surface of the extension 10 in the housing 2, such as... Figure 6 As shown, a second insertion hole 14 is provided on the surface of the base plate 6 in the base 1, and the insertion tongue 13 is inserted into the second insertion hole 14 to prevent the shell 2 and the base 1 from rotating due to external force, which would cause the seal to fail and improve long-term stability.

[0041] like Figure 8 As shown, the inner wall of the housing 2 is provided with a number of positioning parts 15 for positioning the PCBA board 16, so as to ensure that the PCBA board 16 is installed in a precise position and avoid displacement or poor contact caused by vibration.

[0042] The positioning components 15 include a first positioning component, a second positioning component, and a third positioning component. The first positioning component is a stepped positioning component, which includes a base and a stepped portion. The shape of the stepped portion corresponds to the arc-shaped slot 20 on the side of the PCBA board 16, limiting the radial displacement of the PCBA board 16 and ensuring that the PIN pin group is aligned with the socket 12. The second positioning component is an umbrella-shaped component. The straight surface of the second positioning component contacts the side of the PCBA board 16, providing uniform support through surface contact and avoiding local stress concentration that could cause deformation of the PCBA board 16. The third positioning component is a protrusion used to limit the position of the PCBA board 16 and prevent the PCBA board 16 from contacting the inner top surface of the housing 2.

[0043] like Figure 3As shown, the PCBA board 16 includes a board body. Several through holes 19 are provided on the surface of the board body for the positive PIN group 17 and the negative PIN group 18 to pass through. An arc-shaped groove 20 is provided on the outer circumferential wall of the board body to cooperate with the first positioning member in the housing 2. The edge of the board body has a straight cut 21, which cooperates with the second positioning member.

[0044] Work process:

[0045] Step 1: When the external water level rises or liquid comes into contact with the sensor, water flows into the sensor through the water inlet channel 24 between the base 1 and the sensor 2.

[0046] Step 2: Water flows into the positive PIN pin group 17 and negative PIN pin group 18 in the base 1 to form a conductive path. The circuit on the PCBA board 16 monitors the changes in electrical signals of the electrode components in real time and converts the analog signals into digital signals.

[0047] Step 3: The microprocessor built into PCBA board 16 filters, amplifies, or performs threshold judgment on the signal. If the detected value exceeds the preset threshold, it is determined to be in a water-related state. The processed signal is output to an external device through terminal 23. After receiving the water-related signal, the external device triggers a clamping or automatic control action.

[0048] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A wade sensor characterized by: The application relates to a shell structure of a battery pack, which comprises a base (1) and a shell (2), the base (1) is covered by the shell (2), a resin plate (22) is arranged in the shell (2), a containing cavity is formed between the shell (2) and the resin plate (22), a PCBA plate (16) is arranged in the containing cavity, a positive PIN needle group (17) and a negative PIN needle group (18) are arranged on the resin plate (22) and the PCBA plate (16), a terminal (23) is arranged on the shell (2), one end of the terminal (23) is connected with the positive PIN needle group (17) and the negative PIN needle group (18), and the other end of the terminal (23) is connected with external equipment. A gap is formed between the outer wall of the base (1) and the inner wall of the shell (2), a water inlet flow channel (24) is formed between the base (1) and the shell (2) through the gap, and an opening (9) is arranged on the base (1), and the water inlet flow channel (24) is communicated with the inside of the base (1) through the opening (9).

2. A wade sensor according to claim 1, wherein: The base (1) is in interference fit with the shell (2), a protrusion (3) is arranged on the outer edge of the upper end opening of the base (1), and a groove (4) matched with the protrusion (3) is arranged on the lower end edge of the inner wall of the shell (2).

3. The wade sensor of claim 1, wherein: The base (1) comprises a column (5) with a through hole and a bottom plate (6), a reinforcing rib plate (7) is arranged at the joint of the column (5) and the bottom plate (6), screw holes (8) are arranged at the two ends of the bottom plate (6), and the top surface of one reinforcing rib plate (7) is in contact with the bottom surface of the shell (2).

4. The wade sensor of claim 1, wherein: The shell (2) comprises a shell body, the shell body is provided with an extension (10) extending downward, the side edge of the shell body is provided with an insertion port (11) extending outward, the bottom surface of the insertion port (11) is provided with a plurality of first insertion holes (12), and the pin of one end of the terminal (23) is inserted into the first insertion hole (12).

5. The wade sensor of claim 1, wherein: An opening (9) is arranged on the peripheral wall of the column (5) in the base (1), and the extension (10) in the shell (2) blocks the position of the opening (9).

6. The wade sensor of claim 1, wherein: A plug (13) is arranged on the bottom surface of the extension (10) in the shell (2), a second insertion hole (14) is arranged on the plate surface of the bottom plate (6) in the base (1), the plug (13) is inserted into the second insertion hole (14), and the plug (13) is used for preventing the shell (2) and the base (1) from rotating.

7. The wade sensor of claim 1, wherein: A plurality of positioning members (15) for positioning the PCBA plate (16) are arranged on the inner wall of the shell (2).

8. A wade sensor according to claim 7, wherein: The positioning members (15) are first positioning members, second positioning members and third positioning members, the first positioning members are step type positioning members, the step type positioning members comprise a base and a step portion, the shape of the step portion is arranged in correspondence with an arc-shaped notch (20) of the side edge of the PCBA plate (16), the second positioning members are umbrella type members, the straight surface of the second positioning members is in contact with the side edge of the PCBA plate (16), and the third positioning members are protrusions.

9. The wade sensor of claim 1, wherein: The PCBA board (16) comprises a board body, a plurality of through holes (19) are formed on the board face of the board body for the positive PIN needle group (17) and the negative PIN needle group (18) to pass through, an arc-shaped notch (20) is clamped on the outer circumferential wall of the board body and cooperates with the first positioning member in the shell (2), the edge of the board body is provided with a straight incision (21) which cooperates with the second positioning member.

10. The wade sensor of claim 1, wherein: The bottom face of the positive PIN needle group (17) and the negative PIN needle group (18) and the top face of the opening (9) in the base (1) have a height H, and the height H is the height of effective liquid level detection.

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