Wading monitoring pressure sensor and manufacturing method thereof

Abstract

The invention relates to a wading monitoring pressure sensor and a manufacturing method thereof, and the sensor comprises a base which is connected with a vehicle; the pressure chip is used for detecting medium pressure and converting a pressure signal into an electric signal to be output; the trimming circuit board is used for processing the electric signal output by the pressure chip into a specific output signal; the protective cover is arranged on the trimming circuit board around a connecting point of the pressure chip and the trimming circuit board; the cover body is connected with the base, the cover body is used for sealing the mounting space, and a threading hole is formed in the cover body; and the cable is used for connecting the trimming circuit board and the vehicle machine so as to transmit electric signals. When a vehicle passes through a ponding road section, the pressure chip converts a pressure signal of ponding into an electric signal, the electric signal output by the pressure chip is amplified / trimmed through the trimming circuit board and converted into a specific electric signal to be output to the vehicle machine through the cable, and the vehicle machine converts the collected specific electric signal into the fording depth to warn a driver.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to a water monitoring pressure sensor and a manufacturing method thereof. Background Art

[0002] At present, water monitoring pressure sensors are widely used in the fields of ocean detection, water plants, automobiles, etc. Their main function is to convert water pressure into electrical signal output to monitor water level changes. Their main characteristics are high requirements for reliability, stability and corrosion resistance. However, when a vehicle drives on a flooded road, the driver often cannot directly judge the depth of the water and cannot predict the danger of the road ahead, which leads to safety accidents. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, one of the purposes of the present invention is to provide a water wading monitoring pressure sensor to solve the problem that when the existing vehicle drives on a flooded road, the driver is often unable to directly judge the depth of the wading water and cannot predict the danger of the road ahead, which leads to safety accidents. The second purpose is to provide a manufacturing method of a water wading monitoring pressure sensor.

[0004] In order to achieve the above-mentioned object and other related objects, the present invention provides a water monitoring pressure sensor, comprising:

[0005] A base, used for connecting with a vehicle, the base is provided with an installation space and a medium inlet, and a joint and a connecting pipe are sequentially provided along the direction extending from the medium inlet to the installation space, the joint and the connecting pipe are both coaxially provided with a medium channel, and the medium channel is communicated with the medium inlet;

[0006] A pressure chip is arranged at one end of the connecting pipe axially away from the medium inlet and blocks the medium channel. The pressure chip is used to detect the medium pressure and convert the pressure signal into an electrical signal for output;

[0007] A trimming circuit board is arranged in the installation space, the pressure chip is connected to the trimming circuit board, and the trimming circuit board is used to amplify / trim the signal output by the pressure chip and convert it into a specific electrical signal;

[0008] A protective cover is disposed on the trimming circuit board and is disposed around a connection point between the pressure chip and the trimming circuit board;

[0009] A cover body connected to the base, the cover body is used to close the installation space, and the cover body is provided with a threading hole;

[0010] A cable passes through the threading hole and is connected to the adjustment circuit board. The cable is used to connect the adjustment circuit board and the vehicle computer to transmit electrical signals.

[0011] Optionally, a mounting boss is provided in the mounting space, and the mounting boss is used for mounting the trimming circuit board.

[0012] Optionally, a vent hole is provided on the protective cover, and a vent pipe is provided in the cable.

[0013] Optionally, a protective layer is coated on one side surface of the pressure chip facing the protective cover along the thickness direction.

[0014] Optionally, bushings are symmetrically arranged on the base, and the bushings are used to pass a locking piece through the bushings to connect with the vehicle.

[0015] Optionally, the outer wall surface of the bushing has at least one first axial limiting portion distributed along its axial direction, and the outer wall surface of the joint has at least one second axial limiting portion distributed along its axial direction, and the first axial limiting portion and the second axial limiting portion are both concave-convexly matched with the base.

[0016] Optionally, the base is provided with an installation limiting portion, and the installation limiting portion is used to limit the installation of the cover body along the axial direction of the base.

[0017] Optionally, the cover body has a plurality of clamping parts distributed along its circumference, and the clamping parts are clamped and matched with the base.

[0018] Optionally, a convex portion is provided around the wire threading hole on one side surface of the cover body facing the installation space, and a first glue groove is provided on the convex portion; a second glue groove is provided around the wire threading hole on one side surface of the cover body away from the installation space, and the first glue groove and the second glue groove are used to fill with sealant, and the sealant is used to seal the wire threading hole and fix the cable.

[0019] A method for manufacturing a water wading monitoring pressure sensor, applied to the water wading monitoring pressure sensor according to any one of claims 1 to 9, the method for manufacturing the water wading monitoring pressure sensor comprising:

[0020] Weld and fix the joints and connecting pipes;

[0021] The welded joint, the connecting pipe and the bushing are molded by insert injection molding in an injection mold to form a base;

[0022] Bonding the pressure chip to the connecting pipe, and blocking the medium channel by the pressure chip;

[0023] Bonding the trimming circuit board to the mounting boss, connecting the pins of the pressure chip to the pad circuit on the trimming circuit board through binding wires, and coating a protective layer on the surface of the pressure chip on a side away from the medium channel;

[0024] Adhere the protective cover to the trimming circuit board around the connection point between the pressure chip and the trimming circuit board, and open a vent hole on the protective cover;

[0025] Pass the cable through the threading hole on the cover body, fill the first glue groove and the second glue groove with sealant, and connect the cable to the adjustment circuit board by soldering;

[0026] The clamping part of the cover body is clamped and installed with the base, and glue is filled in the installation gap between the cover body and the base to seal and fix.

[0027] As described above, the present invention has the following beneficial effects: the present invention installs the trimming circuit board in the installation space of the base, sets the pressure chip on the connecting pipe, and blocks the medium channel to prevent the medium from entering the installation space and causing damage to the trimming circuit board. The medium enters the base through the medium inlet and is transmitted to the pressure chip through the medium channel, and the pressure chip detects the medium pressure; the pressure chip is connected to the trimming circuit board, and the protective cover is set on the trimming circuit board and around the connection point between the pressure chip and the trimming circuit board, so as to protect the connection between the pressure chip and the trimming circuit board. The pressure chip converts the detected pressure signal into an electrical signal output, and the trimming circuit board amplifies / modifies the signal output by the pressure chip, converts it into a specific electrical signal, transmits the signal to the vehicle computer through the cable, and the vehicle computer converts the collected electrical signal into the wading depth to warn the driver, so that the driver can judge the wading depth in advance and avoid safety accidents; the cover body is connected to the base, so as to close the installation space of the base, so that the installation space forms a closed environment, and the medium enters the installation space and causes damage to the trimming circuit board, and the cable passes through the threading hole set on the cover body to pass through the wading monitoring pressure sensor. The present application has a compact structure and low cost, and the water wading monitoring pressure sensor has its own cable output, which makes its installation position relatively flexible and can monitor a larger water wading depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Shown is a schematic diagram of the structure of a water monitoring pressure sensor shown in an embodiment of the present application;

[0029] Figure 2 Shown is a schematic cross-sectional structure diagram of a water wading monitoring pressure sensor according to an embodiment of the present application;

[0030] Figure 3 Display as Figure 2 Schematic diagram of the cross-sectional structure of NN;

[0031] Figure 4 A flow chart showing a method for manufacturing a water wading monitoring pressure sensor according to an embodiment of the present application is shown.

[0032] Description of Reference Numerals

[0033] Base 1, installation space 101, installation boss 101a, medium inlet 102, installation limit portion 103, joint 2, second axial limit portion 201, connecting pipe 3, medium channel 4, pressure chip 5, adjustment circuit board 6, protective cover 7, vent hole 701, cover body 8, threading hole 801, clamping portion 802, convex portion 803, first glue groove 803a, second glue groove 804, bushing 9, cable 10. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0035] See also Figures 1 to 4 It should be noted that the diagrams provided in the present embodiment only illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than drawing according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0036] Before describing the embodiments of the present invention in detail, the application environment of the present invention is described first. The technology of the present invention is mainly applied to the field of sensor technology. The present invention is used to solve the problem that when the existing vehicle drives on a flooded road, the driver is often unable to directly judge the depth of the wading water and cannot predict the danger of the road ahead, which leads to safety accidents.

[0037] Please combine Figures 1 to 3 As shown, the present invention provides a water wading monitoring pressure sensor.

[0038] In an exemplary embodiment of the present application, a water wading monitoring pressure sensor includes:

[0039] The base 1 is used to connect with the vehicle. The base 1 is provided with an installation space 101 and a medium inlet 102. A joint 2 and a connecting pipe 3 are sequentially provided along the direction extending from the medium inlet 102 to the installation space 101. The joint 2 and the connecting pipe 3 are both coaxially provided with a medium channel 4 along the axial direction. The medium channel 4 is communicated with the medium inlet 102.

[0040] The pressure chip 5 is arranged at one end of the connecting pipe 3 axially away from the medium inlet 102 and blocks the medium channel 4. The pressure chip 5 is used to detect the medium pressure and convert the pressure signal into an electrical signal for output;

[0041] The trimming circuit board 6 is arranged in the installation space 101, and the pressure chip 5 is connected to the trimming circuit board 6. The trimming circuit board 6 is used to amplify / trim the signal output by the pressure chip 5 and convert it into a specific electrical signal;

[0042] A protective cover 7 is disposed on the trimming circuit board 6 and is disposed around the connection point between the pressure chip 5 and the trimming circuit board 6;

[0043] A cover body 8 is connected to the base 1, and is used to close the installation space 101. The cover body 8 is provided with a threading hole 801;

[0044] The cable 10 passes through the threading hole 801 and is connected to the adjustment circuit board 6. The cable 10 is used to connect the adjustment circuit board 6 and the vehicle computer to transmit electrical signals.

[0045] In this embodiment, the medium inlet 102 is a conical open structure, the medium channel 4 opened on the joint 2 and the connecting pipe is connected to the medium inlet 102, the pressure chip 5 is arranged on the connecting pipe 3, and separates the medium channel 4 from the installation space 101, the medium enters the sensor through the medium inlet 102, and the medium is transferred to the back cavity of the pressure chip 5 through the medium channel 4 to detect the medium pressure; the pins of the pressure chip 5 are electrically connected to the adjustment circuit board 6 through binding wires, the pressure chip 5 converts the detected pressure signal into an electrical signal, and the adjustment circuit board 6 amplifies / adjusts the signal output by the pressure chip 5 and converts it into a specific electrical signal, the adjustment circuit board 6 is welded with a signal acquisition / amplification / compensation ASIC and its supporting components, the adjustment circuit board 6 is connected to the external device of the sensor through a cable 10, and outputs the electrical signal to the external device through the cable 10.

[0046] It is worth noting that, in this embodiment, the trimming circuit board 6 is installed in the installation space 101 of the base 1, the pressure chip 5 is arranged on the connecting pipe 3, and the medium channel 4 is blocked to prevent the medium from entering the installation space 101 and causing damage to the trimming circuit board 6. The medium enters the base 1 through the medium inlet 102 and is transmitted to the pressure chip 5 through the medium channel 4. The pressure of the medium is detected by the pressure chip 5; the pressure chip 5 is connected to the trimming circuit board 6, and the protective cover 7 is arranged on the trimming circuit board 6 and around the connection point between the pressure chip 5 and the trimming circuit board 6, so as to protect the pressure chip 5. 5 is connected with the adjustment circuit board 6 to form protection, the pressure chip 5 converts the detected pressure signal into an electrical signal, the adjustment circuit board 6 amplifies / adjusts the signal output by the pressure chip 5, converts it into a specific electrical signal, and transmits the signal to the sensor external device through the cable 10; it is connected with the base 1 through the cover body 8, thereby closing the installation space 101 of the base 1, so that the installation space 101 forms a closed environment, and prevents the medium from entering the installation space 101 and causing damage to the adjustment circuit board 6, and the cable 10 passes through the threading hole 801 set on the cover body 8 to pass through the water monitoring pressure sensor. The present application has a compact structure and low cost, and the water monitoring pressure sensor has its own cable 10 output mode, which makes its installation position relatively flexible and can monitor a larger water depth.

[0047] Exemplarily, the water wading monitoring pressure sensor is installed on the vehicle through the base 1, and the sensor is connected to the vehicle computer through the cable 10. When the vehicle passes through a flooded section of road, the water wading monitoring pressure sensor contacts or is immersed in the accumulated water. The pressure of the accumulated water is transmitted to the back cavity of the pressure chip 5 through the medium inlet 102 protruding from the bottom of the base 1, the joint 2 and the medium channel 4 of the connecting pipe 3. The pressure chip 5 converts the pressure signal of the accumulated water into an electrical signal, and the electrical signal detected by the pressure chip 5 is amplified / adjusted by the adjustment circuit board 6, converted into a specific electrical signal and outputted to the ECU through the cable 10. The ECU converts the collected specific electrical signal into the wading depth for alerting the driver.

[0048] In an exemplary embodiment of the present application, a mounting boss 101 a is provided in the mounting space 101 , and the mounting boss 101 a is used for mounting the trimming circuit board 6 .

[0049] In this embodiment, a cavity is provided in the middle of the mounting boss 101a, the connecting tube 3 is located inside the cavity, the pressure chip 5 is bonded to the connecting tube 3, a circular hole is provided on the trimming circuit board 6 corresponding to the cavity, the connecting tube 3 extends out of the circular hole, so that the pressure chip 5 is slightly higher than the upper surface of the trimming circuit board 6, and the pressure chip 5 is electrically connected to the trimming circuit board 6 via a binding wire. The trimming circuit board 6 is bonded to the mounting boss 101a.

[0050] In an exemplary embodiment of the present application, a vent hole 701 is provided on the protective cover 7 , and a vent pipe is provided inside the cable 10 .

[0051] In this embodiment, the cable 10 is a ventilated cable 10. The cable 10 passes through the sensor through the threading hole 801 set on the cover body 8 to connect with the vehicle computer. The installation space 101 is closed by the cover body 8 to form a closed space to prevent the medium from entering the sensor. The interior of the installation space 101 is connected to the atmosphere through the cable 10, and the interior of the protective cover 7 is connected to the installation space 101 through the vent hole 701, so that the pressure chip 5 is connected to the atmosphere, thereby preventing the atmospheric pressure from affecting the measurement accuracy of the sensor. After the protective cover 7 is coated with glue, it is bonded to the trimming circuit board 6 to protect the pressure chip 5 and the binding wire for subsequent packaging.

[0052] In an exemplary embodiment of the present application, a protective layer is coated on one side of the pressure chip 5 facing the protective cover 7 along the thickness direction.

[0053] In this embodiment, a protective layer is coated on the surface of the pressure chip 5 in contact with the atmosphere to isolate the water vapor in the atmosphere, thereby preventing the water vapor in the atmosphere from damaging the pressure chip 5.

[0054] In an exemplary embodiment of the present application, bushings 9 are symmetrically arranged on the base 1 , and the bushings 9 are used to pass a locking member through and connect with the vehicle.

[0055] In this embodiment, a locking member (such as a bolt) is passed through the bushing 9 to be locked and fixed to the vehicle body.

[0056] In an exemplary embodiment of the present application, at least one first axial limit portion is distributed along the axial direction on the outer wall surface of the bushing 9, and at least one second axial limit portion 201 is distributed along the axial direction on the outer wall surface of the joint 2, and both the first axial limit portion and the second axial limit portion 201 are concavely and convexly matched with the base 1.

[0057] In this embodiment, the first axial limiting portion and the second axial limiting portion 201 are both recessed annular grooves. When the bushing 9 and the joint 2 are embedded in the base 1 by injection molding, the base 1 can form a concave-convex matching axial limiting portion with the joint 2 and the bushing 9 at the recessed annular groove, thereby limiting the bushing 9 and the joint 2 along their own axial direction, thereby preventing the bushing 9 and the joint 2 from axially moving along themselves on the base 1.

[0058] In an exemplary embodiment of the present application, a mounting limit portion 103 is provided on the base 1 , and the mounting limit portion 103 is used to limit the mounting of the cover 8 along the axial direction of the base 1 .

[0059] In this embodiment, the installation limiting portion 103 is an annular limiting step disposed in the installation space 101 , and the end of the cover body 8 abuts against the annular limiting step, thereby limiting the installation of the cover body 8 along the axial direction of the base 1 .

[0060] In an exemplary embodiment of the present application, the cover body 8 has a plurality of snap-fitting portions 802 distributed along its circumference, and the snap-fitting portions 802 are snap-fitted with the base 1 .

[0061] In this embodiment, the clamping portion 802 is a wedge-shaped block arranged on the side surface of the cover body 8. The wedge-shaped block is squeezed and fitted with the inner wall surface of the base 1, so that an interference fit is achieved between the cover body 8 and the base 1. After the clamping is completed, sealant is filled in the gap between the cover body 8 and the base 1 to connect and fix the cover body 8 and the base 1, and the installation space 101 is sealed.

[0062] In an exemplary embodiment of the present application, a side surface of the cover body 8 facing the installation space 101 is provided with a protrusion 803 around the wire hole 801, and a first glue groove 803a is provided on the protrusion 803. A side surface of the cover body 8 facing away from the installation space 101 is provided with a second glue groove 804 around the wire hole 801. The first glue groove 803a and the second glue groove 804 are used to fill with sealant, and the sealant is used to seal the wire hole 801 and fix the cable 10.

[0063] In this embodiment, the cable 10 is connected and fixed to the cover body 8 through the sealant filled in the first glue groove 803a and the second glue groove 804, and forms a double seal on the cover body 8 at the threading hole 801, effectively ensuring the sealing performance at the threading hole 801.

[0064] The present application also proposes a method for manufacturing a water-related monitoring pressure sensor.

[0065] See also Figure 4 As shown, Figure 4 The flowchart of the manufacturing method of the water monitoring pressure sensor includes at least steps S110 to S170.

[0066] In step S110 , the joint 2 and the connecting pipe 3 are fixed by welding.

[0067] Exemplarily, a mounting groove is provided on the joint 2 , a portion of the connecting pipe 3 is installed in the mounting groove of the joint 2 , and the outer wall of the connecting pipe 3 and the end face of the joint 2 are welded and fixed.

[0068] In step S120 , the welded joint 2 , the connecting pipe 3 and the bushing 9 are molded by insert injection molding in an injection mold to form a base 1 .

[0069] In step S130 , the pressure chip 5 is bonded to the connecting pipe 3 , and the medium channel 4 is blocked by the pressure chip 5 .

[0070] In step S140 , the trimming circuit board 6 is bonded onto the mounting boss 101 a , the pins of the pressure chip 5 are connected to the pad circuits on the trimming circuit board 6 via binding wires, and a protective layer is coated on the surface of the pressure chip 5 facing away from the medium channel 4 .

[0071] In step S150 , the protective cover 7 is bonded to the trimming circuit board 6 around the connection points between the pressure chip 5 and the trimming circuit board 6 , and a vent hole 701 is opened on the protective cover 7 .

[0072] In step S160 , the cable 10 is passed through the threading hole 801 on the cover 8 , and the first glue groove 803 a and the second glue groove 804 are filled with sealant, and the cable 10 is connected to the trimming circuit board 6 by soldering.

[0073] Exemplarily, the cable 10 is used to be connected to the vehicle computer and has an output terminal.

[0074] In step S170, the clamping portion 802 of the cover 8 is clamped and installed with the base 1, and glue is filled in the installation gap between the cover 8 and the base 1 to seal and fix them.

[0075] Working principle: the present application installs the trimming circuit board 6 in the installation space 101 of the base 1, sets the pressure chip 5 on the connecting pipe 3, and blocks the medium channel 4 to prevent the medium from entering the installation space 101 and causing damage to the trimming circuit board 6. The medium enters the base 1 through the medium inlet 102 and is transmitted to the pressure chip 5 through the medium channel 4. The pressure of the medium is detected by the pressure chip 5. The pressure chip 5 is connected to the trimming circuit board 6, and the protective cover 7 is set on the trimming circuit board 6 and around the connection point between the pressure chip 5 and the trimming circuit board 6, so as to protect the connection between the pressure chip 5 and the trimming circuit board 6. The pressure chip 5 will detect The pressure signal received is converted into an electrical signal, and the adjustment circuit board 6 amplifies / adjusts the signal output by the pressure chip 5, converts it into a specific electrical signal, and transmits the signal to the vehicle computer through the cable 10, and the vehicle computer converts the collected electrical signal into the wading depth to warn the driver, so that the driver can judge the wading depth in advance and avoid safety accidents; the cover body 8 is connected to the base 1, thereby closing the installation space 101 of the base 1, so that the installation space 101 forms a closed environment, and the medium is prevented from entering the installation space 101 and causing damage to the adjustment circuit board 6, and the cable 10 passes through the threading hole 801 set on the cover body 8 to pass through the wading monitoring pressure sensor. The present application has a compact structure and low cost, and the wading monitoring pressure sensor has its own cable 10 output, which makes its installation position relatively flexible and can monitor a larger wading depth.

[0076] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A water monitoring pressure sensor, characterized in that: include: A base, used for connecting with a vehicle, the base is provided with an installation space and a medium inlet, and a joint and a connecting pipe are sequentially provided along the direction extending from the medium inlet to the installation space, the joint and the connecting pipe are both coaxially provided with a medium channel, and the medium channel is communicated with the medium inlet; A pressure chip is arranged at one end of the connecting pipe axially away from the medium inlet and blocks the medium channel. The pressure chip is used to detect the medium pressure and convert the pressure signal into an electrical signal for output; A trimming circuit board is arranged in the installation space, the pressure chip is connected to the trimming circuit board, and the trimming circuit board is used to amplify / trim the electrical signal output by the pressure chip and convert it into a specific electrical signal; A protective cover is disposed on the trimming circuit board and is disposed around a connection point between the pressure chip and the trimming circuit board; A cover body connected to the base, the cover body is used to close the installation space, and the cover body is provided with a threading hole; A cable passes through the threading hole and is connected to the adjustment circuit board. The cable is used to connect the adjustment circuit board and the vehicle computer to transmit electrical signals.

2. The water wading monitoring pressure sensor according to claim 1, characterized in that: A mounting boss is provided in the mounting space, and the mounting boss is used for mounting the trimming circuit board.

3. The water wading monitoring pressure sensor according to claim 1, characterized in that: A vent hole is provided on the protective cover, and a vent pipe is provided in the cable.

4. The water wading monitoring pressure sensor according to claim 1, characterized in that: A protective layer is coated on one side surface of the pressure chip facing the protective cover along the thickness direction.

5. The water wading monitoring pressure sensor according to claim 1, characterized in that: The base is symmetrically provided with bushings, and the bushings are used to pass locking pieces through and connect with the vehicle.

6. The water wading monitoring pressure sensor according to claim 5, characterized in that: The outer wall surface of the bushing is provided with at least one first axial limit portion along its axial direction, and the outer wall surface of the joint is provided with at least one second axial limit portion along its axial direction. Both the first axial limit portion and the second axial limit portion are concavely and convexly matched with the base.

7. The water wading monitoring pressure sensor according to claim 1, characterized in that: The base is provided with an installation limiting portion, and the installation limiting portion is used to limit the installation of the cover body along the axial direction of the base.

8. The water wading monitoring pressure sensor according to claim 7, characterized in that: The cover body is provided with a plurality of clamping parts distributed along its circumference, and the clamping parts are clamped and matched with the base.

9. The water wading monitoring pressure sensor according to claim 8, characterized in that: A convex portion is provided around the wire threading hole on one side surface of the cover body facing the installation space, and a first glue groove is provided on the convex portion. A second glue groove is provided around the wire threading hole on one side surface of the cover body away from the installation space. The first glue groove and the second glue groove are used to fill with sealant, and the sealant is used to seal the wire threading hole and fix the cable.

10. A method for manufacturing a water-wading monitoring pressure sensor, applied to the water-wading monitoring pressure sensor as claimed in any one of claims 1 to 9, characterized in that: The manufacturing method of the water wading monitoring pressure sensor comprises: Weld and fix the joints and connecting pipes; The welded joint, the connecting pipe and the bushing are molded by insert injection molding in an injection mold to form a base; Bonding the pressure chip to the connecting pipe, and blocking the medium channel by the pressure chip; Bonding the trimming circuit board to the mounting boss, connecting the pins of the pressure chip to the pad circuit on the trimming circuit board through binding wires, and coating a protective layer on the surface of the pressure chip on a side away from the medium channel; Adhere the protective cover to the trimming circuit board around the connection point between the pressure chip and the trimming circuit board, and open a vent hole on the protective cover; Pass the cable through the threading hole on the cover body, fill the first glue groove and the second glue groove with sealant, and connect the cable to the adjustment circuit board by soldering; The clamping part of the cover body is clamped and installed with the base, and glue is filled in the installation gap between the cover body and the base to seal and fix.

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