Closed transceiving split-type half-module ultrasonic sensor

Abstract

The invention relates to the technical field of sensors, in particular to a closed transceiving split-type half-module ultrasonic sensor, which comprises a shell, an ultrasonic sensor and a middle structure made of a vibration absorption material, the shell is composed of a base plate and two barrel structures arranged on the base plate side by side, and a cavity is formed in each barrel structure. The ultrasonic sensor comprises a transmitting sensor, a receiving sensor and a lead, the transmitting sensor and the receiving sensor are respectively arranged in the two cavities, and the middle structure part is arranged in the cavities; the transmitting sensor and the receiving sensor are arranged in a split mode, signal separation is achieved, interference of transmitting signals on receiving signals is effectively reduced, and the guiding effect of the two cavities enhances signal directivity, reduces energy dispersion and improves echo signal strength and measurement precision. The middle structure made of the vibration absorption material effectively absorbs residual vibration, reduces signal interference, enables signals to be purer and more stable, and further improves directivity and energy concentration ratio, thereby improving measurement precision and stability.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to a closed transceiver split semi-module ultrasonic sensor. Background Art

[0002] Ultrasonic sensor is a sensing device commonly used in fields such as distance measurement, object detection and liquid level monitoring. It realizes signal detection based on the principle of ultrasonic emission and reception. The widely used integrated transceiver ultrasonic sensor on the market integrates the emission and reception functions into the same module. Although this structure has the advantages of small size and low cost.

[0003] However, there are certain technical limitations in practical applications. Specifically, coupling interference is easily generated between the transmitting signal and the receiving signal of the integrated transceiver ultrasonic sensor, the directionality is poor, and the echo signal is weak, which affects the purity of the signal and reduces the measurement accuracy, thus leading to large measurement errors.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] The present invention provides a closed transceiver split semi-module ultrasonic sensor, thereby effectively solving the problems pointed out in the background technology.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A closed transceiver split semi-module ultrasonic sensor, comprising: a housing, an ultrasonic sensor, and an intermediate structure made of at least a vibration absorbing material; The housing comprises a base plate and two cylindrical structures arranged in parallel on the base plate, each of the cylindrical structures being provided with a cavity; The ultrasonic sensor comprises a transmitting sensor, a receiving sensor, and leads respectively extending from the ends of the transmitting sensor and the receiving sensor, wherein the transmitting sensor and the receiving sensor are respectively arranged in the two cavities, and the leads are used to connect a circuit or a control system; The intermediate structure is at least partially disposed in the cavity, and the ultrasonic sensor is disposed in the intermediate structure.

[0007] Furthermore, the intermediate structure is entirely made of foam or rubber material.

[0008] Furthermore, the rubber is one of silicone, nitrile rubber, thermoplastic elastomer, fluororubber, polyurethane, EPDM rubber, thermoplastic polyurethane elastomer, and polymer gel material.

[0009] Furthermore, the intermediate structure is a rubber sleeve, and the rubber sleeve and the shell are fixed by a tight fit.

[0010] Furthermore, the contact position between the rubber sleeve and the shell is a surface-fitting structure.

[0011] Furthermore, the contact position between the rubber sleeve and the shell is a full-surface fitting structure.

[0012] Furthermore, the contact position between the rubber sleeve and the shell is a discontinuous surface fitting structure.

[0013] Furthermore, the contact position between the rubber sleeve and the shell is a surface fitting structure obtained after deformation under force.

[0014] Furthermore, the contact position between the rubber sleeve and the shell is a line fitting structure.

[0015] Furthermore, the outer circumferential surface of the rubber sleeve includes a plurality of annular protrusion structures arranged at intervals, and the protrusion structures are linearly fitted with the inner wall of the shell.

[0016] Furthermore, the outer circumferential surface of the rubber sleeve includes a plurality of protrusion structures arranged at intervals along the height direction, and the protrusion structures are linearly fitted with the inner wall of the shell.

[0017] Furthermore, the contact position between the rubber sleeve and the shell is a point-fitting structure.

[0018] Furthermore, the outer circumferential surface of the rubber sleeve is provided with a plurality of convex point structures, and the convex point structures are point-fitted with the inner wall of the shell.

[0019] Furthermore, the intermediate structure is a rubber sleeve, a gap is set between the rubber sleeve and the shell, and the rubber sleeve is fixed by a limiting structure.

[0020] Furthermore, the limiting structure includes a covering structure arranged on the rubber sleeve and the end of the shell.

[0021] Furthermore, the covering structure is that the shell end at least partially covers the rubber sleeve end.

[0022] Furthermore, the covering structure is that the end of the rubber sleeve at least partially covers the end of the shell.

[0023] Furthermore, the limiting structure includes a covering structure arranged between the rubber sleeve and the shell.

[0024] Furthermore, the covering structure includes a convex edge protruding inwardly from the shell along the circumferential direction, and the rubber sleeve is concavely provided with a groove along the circumferential direction, and the convex edge is arranged in the groove.

[0025] Furthermore, the covering structure comprises a groove which is recessed along the circumferential direction of the shell, and the rubber sleeve is provided with a convex edge which is protruded along the circumferential direction, and the convex edge is arranged in the groove.

[0026] Furthermore, the convex edge and the groove are both integral.

[0027] Furthermore, the convex edge and the concave groove are both discontinuous.

[0028] Furthermore, the convex edge is discontinuous and the groove is integral.

[0029] Furthermore, an anti-tilt structure is provided in the gap between the rubber sleeve and the housing.

[0030] Furthermore, the anti-tilt structure includes a protrusion arranged on the outer circumferential surface of the rubber sleeve.

[0031] Furthermore, the raised portion includes an annular structure arranged along the entire outer circumference of the rubber sleeve.

[0032] Furthermore, the raised portion includes a strip structure arranged along the height direction of the rubber sleeve.

[0033] Furthermore, the raised portion includes a strip structure that is intermittently arranged along the outer circumferential surface and / or the height direction of the rubber sleeve.

[0034] Furthermore, the raised portion includes a dot-shaped structure arranged along the outer circumferential surface of the rubber sleeve.

[0035] Furthermore, the protrusion is clearance-fitted with the side wall of the shell.

[0036] Furthermore, a gap between the protrusion and the side wall of the shell is 0.2 mm to 0.5 mm.

[0037] Furthermore, at least ends of the shell and the rubber sleeve are provided with sealing structures.

[0038] Furthermore, the sealing structure comprises a waterproof strip which is arranged on the outer circumferential surface of the rubber sleeve and extends radially, and the waterproof strip is squeezed with the inner wall of the shell to form a seal.

[0039] Furthermore, the sealing structure comprises an umbrella-shaped waterproof structure seal arranged at the end of the rubber sleeve, the end surface of the shell is provided with a waterproof groove, and the umbrella-shaped waterproof structure is arranged in the waterproof groove.

[0040] Furthermore, the sealing structure includes a covering structure which is arranged at the end of the rubber sleeve and extends out of the shell, and the covering structure covers the end of the shell to form a seal.

[0041] Furthermore, the outer surface of the covering structure is provided with a convex structure protruding outward.

[0042] Furthermore, a fixing portion is provided on the substrate between the two cavities, and a signal isolation structure is provided on the fixing portion.

[0043] Furthermore, the fixing part comprises a cylinder arranged on the base plate for the water supply pipe to pass through, and the cylinder is provided with a ring structure for isolating the signal.

[0044] Furthermore, the fixing portion includes a pit arranged on the substrate, and a plate-shaped structure for isolating signals is provided on the pit.

[0045] Furthermore, the signal isolation structure is made of at least one of copper, aluminum, bakelite, and stainless steel.

[0046] Furthermore, it also includes an aluminum shell, and the transmitting sensor and the receiving sensor are arranged in the aluminum shell.

[0047] Furthermore, the end of the aluminum shell is coated with a hydrophobic material.

[0048] Furthermore, the hydrophobic material comprises a bottom layer of hydroxyl-modified resin, a middle layer of silica, and an outer layer of perfluoropolyether siloxane, or a bottom layer of modified polyester resin, a middle layer of fluorinated silica, and an outer layer of perfluoroalkyl siloxane.

[0049] Furthermore, the aluminum shell is potted for the first time with silicone having a hardness of 45 to 60 Shore hardness; and the rubber sleeve is potted for the second time with silicone having a hardness of 25 to 45 Shore hardness.

[0050] The technical solution of the present invention can achieve the following technical effects: The transmitting sensor and receiving sensor are respectively arranged in two independent cavities. The structural design of the shell achieves better signal separation and effectively reduces the interference of the transmitting signal on the receiving signal. At the same time, the guiding effect of the cavity on the signal enhances the directionality of the ultrasonic wave and reduces the energy dispersion phenomenon, thereby improving the strength of the echo signal, increasing the purity of the signal and improving the measurement accuracy.

[0051] The intermediate structure made of vibration-absorbing material can effectively absorb the residual vibration generated by the transmitting sensor and the receiving sensor during operation. The reduction of the residual vibration further reduces the interference to the signal, making the signal purer and more stable, thereby improving the signal's directionality and energy concentration, thereby significantly improving the strength of the echo signal and improving the measurement accuracy and stability of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 It is a schematic diagram of the structure of a closed transceiver split semi-module ultrasonic sensor; Figure 2 This is an exploded view of a closed transceiver split semi-module ultrasonic sensor; Figure 3 It is a cross-sectional view of a closed transceiver split semi-module ultrasonic sensor; Figure 4 is a schematic diagram of the structure of the shell; Figure 5 The schematic diagram of the structure of the first specific implementation method in which the contact position between the rubber sleeve and the housing is a surface fitting structure; Figure 6 A structural schematic diagram of a second specific implementation method in which the contact position between the rubber sleeve and the housing is a surface-fitting structure (method one); Figure 7 A structural schematic diagram of a second specific implementation method in which the contact position between the rubber sleeve and the housing is a surface-fitting structure (method 2); Figure 8 A schematic structural diagram of a third specific implementation method in which the contact position between the rubber sleeve and the housing is a surface-fitting structure; Fig. 9 A structural schematic diagram of a specific implementation method in which the contact position between the rubber sleeve and the housing is a line fitting structure; Fig.10 A structural schematic diagram of another specific implementation method in which the contact position between the rubber sleeve and the housing is a line fitting structure; Fig.11 A structural schematic diagram of a specific implementation method in which the contact position between the rubber sleeve and the housing is a point-fitting structure; Fig.12 A structural schematic diagram of a specific implementation of the covering structure of the rubber sleeve and the shell end; Fig.13 A structural schematic diagram of another specific implementation of the covering structure of the rubber sleeve and the shell end; Fig.14 A structural schematic diagram of another specific implementation method in which the rubber sleeve and the housing are fixed by a limiting structure; Fig.15 A schematic structural diagram of a first and a second specific implementation method of the matching of the boss and the groove; Fig.16 A schematic structural diagram of a third specific implementation method of the boss and the groove matching; Fig.17 A specific structural schematic diagram of the anti-tilt structure; Fig.18 It is a structural schematic diagram of a first specific implementation method of the housing and rubber sleeve end sealing structure; Fig.19 It is a structural schematic diagram of the second and third specific implementations of the housing and rubber sleeve end sealing structure; Fig. 20 A structural schematic diagram of a specific implementation method of the isolation signal structure; Fig.21 A structural diagram of another specific implementation of the isolation signal structure.

[0054] Figure numerals: 1. Shell; 11. Base plate; 111. Fixing part; 12. Cylindrical structure; 121. Cavity; 122. Waterproof groove; 2. Ultrasonic sensor; 21. Transmitting sensor; 22. Receiving sensor; 23. Lead; 3. Rubber sleeve; 31. Protruding structure; 32. Bump structure; 33. Coating structure; 331. Groove; 332. Convex edge; 34. Protruding part; 35. Sealing structure; 351. Umbrella-shaped waterproof structure; 351a. Convex structure; 352. Waterproof strip; 4. Aluminum shell; 5. Signal isolation structure; 51. Ring structure; 52. Plate structure. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0057] like Figures 1 to 21 As shown: A closed transceiver split semi-module ultrasonic sensor, comprising: a housing 1, an ultrasonic sensor 2 and an intermediate structure made of at least a vibration absorbing material, such as Figures 1 to 4 As shown: The housing 1 includes a base plate 11 and two cylindrical structures 12 arranged in parallel on the base plate 11, and each cylindrical structure 12 is provided with a cavity 121; The ultrasonic sensor 2 includes a transmitting sensor 21, a receiving sensor 22, and leads 23 respectively extending from the ends of the transmitting sensor 21 and the receiving sensor 22. The transmitting sensor 21 and the receiving sensor 22 are respectively arranged in two cavities 121. The leads 23 are used to connect to a circuit or a control system. The intermediate structure is at least partially disposed in the cavity 121 , and the ultrasonic sensor 2 is disposed in the intermediate structure to absorb residual vibration and buffer vibration to improve signal stability.

[0058] In this embodiment, since the transmitting sensor 21 and the receiving sensor 22 are respectively arranged in two independent cavities 121, better signal separation is achieved through the structural design of the shell 1. Compared with the traditional transceiver integrated ultrasonic sensor 2, this embodiment effectively reduces the interference of the transmitting signal on the receiving signal. At the same time, through the guidance of the signal by the cavity 121, the directivity of the ultrasonic wave is enhanced, and the energy dispersion phenomenon is reduced, thereby improving the intensity of the echo signal, increasing the purity of the signal, and improving the measurement accuracy. The shell 1 adopts a substrate 11 and two parallel cylindrical structures 12, and the transmitting sensor 21 and the receiving sensor 22 are separately arranged, so that the overall structural design is reasonable and the function is clear, which not only simplifies the production and assembly process, but also facilitates subsequent maintenance and replacement of the sensor module, and improves the reliability and maintainability of the product.

[0059] As a preferred embodiment of the above, the intermediate structure made of vibration-absorbing material can effectively absorb the residual vibration generated by the transmitting sensor 21 and the receiving sensor 22 during operation. The reduction of residual vibration further reduces the interference to the signal, making the signal purer and more stable, thereby improving the signal's directionality and energy concentration, thereby significantly improving the strength of the echo signal, and improving the measurement accuracy and stability of the sensor. The ultrasonic sensor 2 is placed in the intermediate structure, and the signal fluctuation caused by vibration and residual vibration is reduced through the buffering effect of the vibration-absorbing material, thereby improving the stability of the ultrasonic signal, which is particularly suitable for scenes requiring high-precision detection. By separating the transmitting sensor 21 and the receiving sensor 22 in two independent cavities 121, the interference of the transmitting signal on the receiving signal is effectively reduced; at the same time, the intermediate structure made of vibration-absorbing material uses soft materials, which can effectively block the transmission of electrical signals through the shell 1, further isolate electromagnetic interference, and overcome the interference problem caused by residual vibration of the traditional integrated transceiver ultrasonic sensor 2, thereby improving the measurement accuracy of the sensor.

[0060] In response to the influence of the external environment, the intermediate structure made of vibration-absorbing material is located between the ultrasonic sensor 2 and the side wall of the shell 1, which plays the role of shock absorption, buffering and isolation, and can reduce the interference of vibration in the external environment on the normal operation of the sensor, ensuring that the sensor can still maintain stable operation in complex environments.

[0061] The split design enables the sensor to have flexible combination in terms of functional modules, and transmitting sensors 21 and receiving sensors 22 with different performances can be selected according to actual application requirements; for example, it can meet various functional requirements such as distance measurement, liquid level detection, obstacle detection, etc., and has stronger adaptability, and is suitable for automatic water discharge in refrigerators, water tank and water tower liquid level monitoring, car reversing radar and parking assistance, smart sanitary ware, robot obstacle avoidance and navigation, ultrasonic medical equipment, smart security systems, automatic driving assistance, underwater robots and other scenarios.

[0062] In the present embodiment, the intermediate structure is made of foam or rubber material as a whole. Specifically, the foam material or rubber material has good elasticity and vibration absorption performance, and the cost of foam is relatively low. The foam can be made into a strip structure, and the strip structure is wound around the outer circumferential surface of the ultrasonic sensor 2 circle by circle, and then the ultrasonic sensor 2 wrapped with the foam is loaded into the cavity 121. As for the rubber material, it is more preferred to make it into a cylindrical structure than the above-mentioned strip structure, thereby forming a rubber sleeve 3, and the rubber sleeve 3 is installed between the housing 1 and the sensor; both can effectively absorb external vibration and residual vibration, and reduce the interference of vibration on the ultrasonic signal; of course, the above-mentioned strip structure or cylindrical structure is only an example of a specific structural form. Other structural forms formed by foam material or rubber material are also within the protection scope of the present invention when they can meet the requirements of the present invention.

[0063] Among them, the rubber is one of silicone, nitrile rubber (NBR), thermoplastic elastomer (TPE), fluororubber (FKM), polyurethane (PU), ethylene propylene diene monomer rubber (EPDM), thermoplastic polyurethane elastomer (TPU), and polymer gel material.

[0064] Specifically, taking the rubber sleeve 3 made of the above materials as an example, the rubber sleeve 3 can be made by extrusion molding, injection molding, liquid injection molding (LIM), 3D printing, etc.

[0065] The first specific implementation method for fixing the rubber sleeve 3 and the shell 1 is as follows: the intermediate structure is the rubber sleeve 3, and the rubber sleeve 3 and the shell 1 are fixed by a tight fit. On the one hand, by designing the tight fit between the rubber sleeve 3 and the shell 1, the relative displacement between the rubber sleeve 3 and the shell 1 can be effectively limited, so that the transmitting and receiving modules of the ultrasonic sensor 2 can maintain a stable installation position during operation, avoiding performance deviations caused by vibration or external forces, and improving the overall stability of the sensor; on the other hand, by designing the tight fit between the rubber sleeve 3 and the shell 1, there is no need for additional complex fixing structures and additional sealing structures 35, which can simplify the production and assembly processes while maintaining structural reliability, reduce production costs, and improve product assembly efficiency.

[0066] The first specific implementation method for the tight fit and fixation of the rubber sleeve 3 and the shell 1 is that the contact position of the rubber sleeve 3 and the shell 1 is a surface fitting structure. Specifically, the surface fitting design has a large contact area, which can enhance the fixing strength of the rubber sleeve 3 and the shell 1.

[0067] like Figure 5 As shown, the contact position of the rubber sleeve 3 and the shell 1 is a surface fitting structure. The first specific implementation method is: the contact position of the rubber sleeve 3 and the shell 1 is a full-surface fitting structure. Specifically, the full-surface fitting structure can refer to Figure 5 For example, the outer surface of the rubber sleeve 3 is a whole surface, which is inserted into the shell to form a whole-surface fit. The outer surface of the rubber sleeve 3 with a whole-surface fitting structure is simple and easy to process and produce. At the same time, the whole-surface fitting structure ensures that there is no gap between the contact surface of the rubber sleeve 3 and the shell 1, forming a seamless connection.

[0068] like Figure 6 As shown, the contact position of the rubber sleeve 3 and the housing 1 is a surface fitting structure. The second specific implementation method is: the contact position of the rubber sleeve 3 and the housing 1 is an intermittent surface fitting structure. Specifically, the intermittent surface can be as follows Figure 6 For example, the outer surface of the rubber sleeve 3 is protruded with multiple spaced circular rings, and the circular rings are provided with an annular surface that fits with the inner wall of the shell 1, and are installed in the shell to form a cross-sectional fitting structure, which can also be as follows Figure 7 The outer circumferential surface of the rubber sleeve 3 shown in the figure is provided with a plurality of discontinuous strip surfaces in the height direction, or it can be a discontinuous surface structure combining the two, all of which are within the protection scope of the present application. The partially contacting discontinuous bonding structure can absorb and buffer the vibration transmitted from the outside, reduce the interference of the vibration on the ultrasonic signal, and improve the measurement accuracy of the signal and the stability of the sensor operation.

[0069] like Figure 8 As shown, the contact position of the rubber sleeve 3 and the shell 1 is a surface fitting structure. The third specific implementation method is: the contact position of the rubber sleeve 3 and the shell 1 is a surface fitting structure obtained after being deformed by force. For details, refer to Figure 8 , annular protrusion structures 31 are arranged at intervals on the outer circular surface. In this preferred embodiment, as a specific implementation method, the outer surface of the annular protrusion can be made into a curved surface structure protruding outward. After the annular protrusion structure 31 is tightly matched with the shell 1, the curved surface structure is appropriately deformed and partially transformed to fit the surface of the inner wall of the shell 1. It can also be protruded in other directions, all of which are within the protection scope of this application.

[0070] The second specific implementation method for the tight fit and fixation of the rubber sleeve 3 and the shell 1 is: the contact position of the rubber sleeve 3 and the shell 1 is a line fitting structure. On the one hand, compared with the surface fitting, the line fitting structure has a smaller contact area, which reduces the friction between the rubber sleeve 3 and the shell 1, and the assembly process is smoother, reducing the assembly difficulty and time cost, which is particularly suitable for scenarios with mass production and high-efficiency assembly requirements; on the other hand, the line fitting structure makes the force on the contact point more concentrated, and the rubber sleeve 3 can effectively absorb external vibration and impact force in the local contact area, providing an additional buffering effect for the sensor, reducing the influence of vibration interference on signal measurement accuracy.

[0071] like Fig. 9 As shown, a specific implementation of the line fitting structure of the contact position between the rubber sleeve 3 and the shell 1 is as follows: the outer circumferential surface of the rubber sleeve 3 includes a plurality of annular protrusion structures 31 arranged at intervals, and the protrusion structures 31 form a line fit with the inner wall of the shell 1. Specifically, as shown Fig. 9 In this preferred embodiment, as a specific implementation method, the outer surface of the protruding structure 31 can be designed as a curved surface structure protruding outward, and there is a smaller contact area between the curved surface structure and the inner wall of the shell 1, thereby reducing the vibration transmission efficiency between the rubber sleeve 3 and the shell 1 and reducing the impact of residual vibration.

[0072] like Fig.10 As shown, another specific implementation method in which the contact position between the rubber sleeve 3 and the shell 1 is a line-fitting structure is as follows: the outer cylindrical surface of the rubber sleeve 3 includes a plurality of protrusion structures 31 arranged at intervals along the height direction, and the protrusion structures 31 form a line fit with the inner wall of the shell 1. The protrusion structures 31 arranged at intervals require less material, which reduces the overall weight of the sensor, while reducing the production costs of the rubber sleeve 3 and the shell 1, and has higher economic benefits. The selection of the cross-section of the protrusion structure 31 in this preferred embodiment, and the technical effect of reducing residual vibration achieved thereby, are the same as those in the above-mentioned embodiment and will not be repeated here.

[0073] The third specific implementation method in which the rubber sleeve 3 and the shell 1 are tightly fitted and fixed is that the contact position between the rubber sleeve 3 and the shell 1 is a point-fitting structure. Compared with the line fitting or surface fitting, the point-fitting structure has a further reduced contact area, which can reduce the friction resistance between the rubber sleeve 3 and the shell 1, making the assembly process smoother, and greatly improving the assembly efficiency, especially in scenarios that require quick installation and efficient production.

[0074] like Fig.11 As shown, a specific implementation method of the contact position between the rubber sleeve 3 and the housing 1 is a point-fitting structure: the outer circumferential surface of the rubber sleeve 3 is provided with a plurality of convex point structures 32, and the convex point structures 32 form a point fit with the inner wall of the housing 1. Fig.11Taking the spherical convex structure 32 in the figure as an example, the convex structure 32 can also be other shapes such as a cone, all of which are within the protection scope of the present application. The convex structure 32 is evenly arranged on the outer cylindrical surface of the rubber sleeve 3, further reducing the contact area and the influence of residual vibration. It can effectively absorb vibration and impact force, reduce the transmission of external vibration to the core components of the sensor, and improve the seismic resistance and signal stability of the sensor.

[0075] The second specific implementation method for fixing the rubber sleeve 3 and the shell 1 is: the intermediate structure is the rubber sleeve 3, and a gap is set between the rubber sleeve 3 and the shell 1, and they are fixed by a limiting structure, that is, there is a gap between the rubber sleeve 3 and the shell 1. During the assembly process, the existence of the gap can reduce the friction resistance between the rubber sleeve 3 and the shell 1, thereby reducing material wear during the assembly process, protecting the contact surface between the rubber sleeve 3 and the shell 1, and improving the smoothness of the assembly process. The limiting structure fixation can effectively prevent the rubber sleeve 3 from shifting or sliding in the shell 1, thereby improving stability.

[0076] A specific implementation method in which the rubber sleeve 3 and the shell 1 are fixed by a limiting structure is as follows: the limiting structure includes a covering structure 33 arranged at the ends of the rubber sleeve 3 and the shell 1. Specifically, the number of the covering structures 33 between the rubber sleeve 3 and the shell 1 can be one or more, which can be selected according to needs, so as to effectively limit the connection between the rubber sleeve 3 and the shell 1 to prevent the rubber sleeve 3 from shifting due to vibration or external force in the working state, thereby ensuring the position stability of the ultrasonic sensor 2 in the shell 1. At the same time, the covering structure 33 at the end can form a seal at the end of the shell 1, thereby eliminating the need for an additional sealing structure 35.

[0077] like Fig.12 As shown, a specific implementation of the covering structure 33 of the rubber sleeve 3 and the end of the shell 1 is: the covering structure 33 is the end of the shell 1 at least partially covering the end of the rubber sleeve 3, specifically, refer to Fig.12 In this embodiment, as a specific implementation method, the covering structure 33 can be designed as a groove 331 structure that is circumferentially recessed at the end of the rubber sleeve 3, and a convex edge 332 is provided in the radial direction of the shell 1. The convex edge 332 is arranged in the inner groove 331 to limit the height direction of the rubber sleeve 3.

[0078] like Fig.13 As shown, another specific implementation of the covering structure 33 of the rubber sleeve 3 and the end of the shell 1 is: the covering structure 33 is the end of the rubber sleeve 3 at least partially covering the end of the shell 1, specifically, refer to Fig.13In this embodiment, as a specific implementation method, the covering structure 33 can be designed as follows: the rubber sleeve 3 is provided with a convex edge 332 along the circumferential direction, and the shell 1 is provided with a groove 331 in the circumferential direction. The convex edge 332 is arranged in the inner groove 331, so that the rubber sleeve 3 partially covers the shell 1 and fixes it. At the same time, an additional sealing effect can be formed without the need for an additional sealing structure 35, which helps to prevent external impurities such as dust, moisture or water from entering the interior of the sensor.

[0079] like Fig.14 As shown in the figure, another specific embodiment of fixing the rubber sleeve 3 and the housing 1 by a limiting structure is: the limiting structure includes a covering structure 33 arranged between the rubber sleeve 3 and the housing 1, so that Fig.14 Taking the structure in as an example, the middle covering structure 33 can also fix the height direction of the rubber sleeve 3. Specifically, when selecting the covering structure 33 for positioning, one or more covering structures 33 can be selected for positioning. The covering structure 33 can be set in the middle, at the end, or in a combination of the end and the middle. It can be freely selected according to the situation, and all are within the protection scope of the present application. However, for the case where there is only the middle covering structure 33, the uncovered end needs to be additionally provided with a sealing structure 35.

[0080] A specific implementation of the coating structure 33 is as follows: Fig.12 The covering structure 33 includes a convex edge 332 protruding inwardly along the circumferential direction of the shell 1, and a groove 331 recessed along the circumferential direction of the rubber sleeve 3. The convex edge 332 is arranged in the groove 331, so that the shell 1 partially covers the rubber sleeve 3. The convex edge 332 of the shell 1 cooperates with the groove 331 of the rubber sleeve 3. Through the embedded structural design, it can provide a firm mechanical limit to prevent the rubber sleeve 3 from sliding or shifting due to vibration or impact during operation.

[0081] Another specific implementation of the coating structure 33 is to continue to refer to Fig.13 The covering structure 33 includes a groove 331 which is recessed along the circumferential direction of the shell 1, and a convex edge 332 which is protruding along the circumferential direction of the rubber sleeve 3. The convex edge 332 is arranged in the groove 331, so that the rubber sleeve 3 partially covers the shell 1. The groove 331 of the shell 1 and the convex edge 332 of the rubber sleeve 3 also realize the limiting fixation of the rubber sleeve 3 through embedding cooperation. The technical effect is the same as that in the above embodiment and will not be repeated here.

[0082] The first specific implementation method of the cooperation between the convex edge 332 and the groove 331 is: the convex edge 332 and the groove 331 are both integral. Fig.15Taking the convex edge 332 and the groove 331 at the middle bottom as an example, a full circle of groove 331 is provided at the bottom of the rubber sleeve 3, and a full circle of convex edge 332 is provided at the bottom of the shell 1. The convex edge 332 is arranged in the groove 331, which avoids the loosening or falling off phenomenon that may occur in the splicing or assembly parts, and significantly improves the mechanical strength of the sensor shell 1. In addition, the integral convex edge 332 and groove 331 can achieve closer and continuous contact at the end of the shell 1, effectively improving the sealing performance.

[0083] like Fig.15 As shown, the second specific implementation method of the convex edge 332 and the groove 331 is: the convex edge 332 and the groove 331 are both discontinuous. Specifically, in this preferred solution, as a specific implementation method, Fig.15 Taking the convex edge 332 and the groove 331 at the middle top as an example, the convex edge 332 on the shell 1 can be two buckles, and the groove 331 on the rubber sleeve 3 is correspondingly designed as two corresponding slots. The buckles are clamped in the slots. The number of buckles can be one, two or more, which can be freely selected according to the needs of the site. Preferably, the design of double buckles or multiple buckles is not easy to tilt, and fast assembly and disassembly are realized; through the multi-point distributed clamping, a high-strength limiting effect is provided, which can effectively prevent sliding or loosening between the rubber sleeve 3 and the shell 1.

[0084] like Fig.16 As shown, the third specific implementation of the cooperation between the convex edge 332 and the groove 331 is: the convex edge 332 is discontinuous, and the groove 331 is integral. Fig.16 Taking the convex edge 332 and the groove 331 at the middle top as an example, the convex edge 332 on the shell 1 can be two buckles, the rubber sleeve 3 is provided with a full circle of groove 331, and the rubber sleeve 3 is provided with two corresponding slots. The intermittent convex edge 332 structure is convenient for quick insertion into the integral design of the groove 331, realizing automatic limiting and quick assembly, reducing the need for adjustment during the assembly process. The selection of the number of buckles and the technical effect of the double buckles in this preferred solution are the same as those in the above embodiment and will not be repeated here.

[0085] As a preferred embodiment of the above embodiment, an anti-tilt structure is provided in the gap between the rubber sleeve 3 and the shell 1. Specifically, preventing the rubber sleeve 3 from tilting enhances the fixing stability between the rubber sleeve 3 and the shell 1. The anti-tilt structure utilizes the buffer space provided by the gap to absorb part of the external force in a high vibration or dynamic environment, thereby reducing the tilt or displacement problem caused by vibration.

[0086] like Fig.17 As shown, a specific implementation of the anti-tilt structure is: the anti-tilt structure includes a protrusion 34 arranged on the outer circumferential surface of the rubber sleeve 3. Specifically, in this preferred embodiment, as a specific implementation, the outer surface of the protrusion 34 can be designed as a curved surface structure protruding outward, which can be Fig.17 The hemispherical cross-section in the figure can also be other shapes such as a conical cross-section, all of which are within the protection scope of the present application. The raised portion 34 ensures that the rubber sleeve 3 is in a vertical state, has a straightening effect on the rubber sleeve 3, and can also reduce the contact area between the rubber sleeve 3 and the shell 1, thereby reducing the direct transmission of external vibration or impact force, reducing aftershocks, and reducing the interference of vibration on the transmitter and receiver.

[0087] A first specific implementation of the raised portion 34 is: the raised portion 34 includes an annular structure arranged along the entire outer circumferential surface of the rubber sleeve 3. Specifically, the entire circle of the raised portion 34 forms an annular support between the rubber sleeve 3 and the shell 1 to prevent the rubber sleeve 3 from tilting, thereby ensuring that the end of the ultrasonic sensor 2 is horizontal, ensuring that the transmitting end and the receiving end are parallel to the detected object, and increasing the measurement accuracy.

[0088] A second specific implementation of the raised portion 34 is: the raised portion 34 includes a strip structure arranged along the height direction of the rubber sleeve 3. Specifically, the strip structures arranged at intervals can play a certain supporting role, and can disperse and absorb external vibrations or impact forces, providing additional buffering protection for the sensor. The number, width and interval of the strip structures can be flexibly designed according to specific application requirements to adapt to the geometric requirements of different shells 1 and rubber sleeves 3.

[0089] A third specific implementation of the raised portion 34 is: the raised portion 34 includes a strip structure intermittently arranged along the outer circumferential surface and / or height direction of the rubber sleeve 3. Specifically, the intermittently designed strip structure can provide necessary support at key positions, while reducing restrictions on non-essential parts, thereby improving the flexibility and specificity of the anti-tilt effect.

[0090] A fourth specific implementation of the raised portion 34 is: the raised portion 34 includes a point structure arranged along the outer cylindrical surface of the rubber sleeve 3. The point structure disperses external forces through multiple discrete support points, effectively reducing the vibration impact caused by local stress concentration and reducing the transmission efficiency of external vibration or impact force.

[0091] Continue to refer Fig.17 The first specific implementation of the relationship between the protrusion 34 and the shell 1 is: there is a clearance fit between the protrusion 34 and the side wall of the shell 1. The clearance fit design can reduce the direct contact area between the protrusion 34 and the shell 1, reduce the vibration transmission efficiency between the rubber sleeve 3 and the shell 1, and reduce the impact of residual vibration.

[0092] As a preferred embodiment of the above embodiment, the gap between the protrusion 34 and the side wall of the shell 1 is 0.2mm to 0.5mm. By setting a reasonable gap between the protrusion 34 and the side wall of the shell 1, it can not only prevent the rubber sleeve 3 from tilting, but also effectively attenuate the residual vibration generated during the operation of the sensor, prevent the residual vibration from interfering with the transmitter and receiver, and improve the measurement accuracy of the sensor.

[0093] As a preferred embodiment of the above, a sealing structure 35 is provided at least at the ends of the housing 1 and the rubber sleeve 3 to prevent dust, moisture, water or other contaminants from entering the interior of the sensor, thereby extending the service life of the ultrasonic sensor 2, and is particularly suitable for devices used in environments requiring waterproofing.

[0094] like Fig.18 As shown, a first specific implementation of the sealing structure 35 at the end of the housing 1 and the rubber sleeve 3 is: the sealing structure 35 includes a waterproof strip 352 arranged on the outer circumferential surface of the rubber sleeve 3 and extending radially, and the waterproof strip 352 is squeezed with the inner wall of the housing 1 to form a seal. Specifically, Fig.18 Taking the sealing structure 35 shown in the figure as an example, the bottom is sealed with a waterproof strip 352. The waterproof strip 352 has a simple structure and is easy to manufacture and process, which can reduce the complexity of the sealing structure 35 and reduce the manufacturing and assembly costs.

[0095] like Fig.19 As shown, a second specific implementation of the sealing structure 35 at the end of the housing 1 and the rubber sleeve 3 is: the sealing structure 35 includes an umbrella-shaped waterproof structure 351 provided at the end of the rubber sleeve 3, and the end surface of the housing 1 is provided with a waterproof groove 122, and the umbrella-shaped waterproof structure is arranged in the waterproof groove 122. In this preferred solution, as a specific implementation, Fig.19 Taking the bottom seal in as an example, the umbrella-shaped waterproof structure 351 is located in the waterproof groove 122 at the end of the shell 1. Through the "umbrella-shaped" design of the end, a buffer area is formed, which reduces the direct contact area between the shell 1 and the rubber sleeve 3, reduces the generation of aftershocks, reduces the interference of residual vibration on the signal, and improves the measurement accuracy. At the same time, the umbrella-shaped waterproof structure 351 is located in the waterproof groove 122 at the end, forming an indirect connection and flexible contact, thereby effectively isolating and attenuating the influence of external vibrations. Therefore, the umbrella-shaped waterproof structure 351 has the effect of reducing residual vibrations.

[0096] Continuing with reference to 19, a third specific embodiment of the sealing structure 35 of the end of the housing 1 and the rubber sleeve 3 is as follows: the sealing structure 35 includes a covering structure arranged at the end of the rubber sleeve 3 and extending out of the housing 1, and the covering structure covers the end of the housing 1 to form a seal, so as to Fig.19Taking the top sealing structure 35 shown in the figure as an example, the rubber sleeve 3 is arranged higher than the housing 1 and covers the end surface of the housing 1. This method has a large covering area, a good sealing effect, and the protruding covering structure protects the end surface of the housing 1. It should be noted that Fig.19 One end is sealed with a covering structure, and the other end is sealed with an umbrella-shaped waterproof structure 351. This only shows a specific implementation method of the combined seal. The specific sealing methods of the covering structure, the umbrella-shaped waterproof structure 351 or the waterproof strip 352 can be freely selected or combined according to actual needs, and are all within the protection scope of this application.

[0097] As a preferred embodiment of the above, the outer surface of the covering structure 33 is provided with a convex structure 351a protruding outwards. Fig.19 Taking the middle top covering structure seal as an example, the convex structure 351a can be a slope, an arc surface or a curved surface, or a combination of the two. The protruding convex structure 351a in the middle can expand the sealing area, effectively guide the liquid away from the sealing contact area, and prevent moisture from penetrating into the sensor from the upper and lower ends; the umbrella-type structural sealing design provides a higher level of protection than traditional sealing through full coverage and arc sealing, and can meet the application requirements of IP68 or higher standards.

[0098] As a preferred embodiment of the above embodiment, a fixing portion 111 is provided on the substrate 11 between the two cavities 121, and a signal isolation structure 5 is provided on the fixing portion 111, which can prevent the electrical signal from interfering with the echo signal due to a large scattering angle, avoid unnecessary interference of the transmitted signal to the receiving end, and enhance the detection of the ultrasonic sensor 2 with higher accuracy and sensitivity.

[0099] like Fig. 20 As shown, a specific implementation of the signal isolation structure 5 is: the fixed portion 111 includes a cylinder arranged on the substrate 11 for the water supply pipe to pass through, and the cylinder is provided with a ring structure 51 for isolating the signal. Specifically, the ring structure 51 is designed on the cylinder, which can not only effectively isolate the interference between the transmitted signal and the received signal, but also absorb and attenuate the mechanical vibration generated by the water flow vibration of the water supply pipe. The ring structure 51 ensures the independence of the signal propagation path through physical isolation and shielding, thereby reducing the measurement error.

[0100] like Fig.21As shown, another specific implementation of the signal isolation structure 5 is: the fixing portion 111 includes a pit arranged on the substrate 11, and a plate-like structure 52 for isolating the signal is provided on the pit. The plate-like structure 52 serves as a shielding layer, which can block unnecessary signal propagation paths, reduce signal crosstalk or reflection interference, and significantly improve signal purity. In addition to the above-mentioned ring-shaped and plate-shaped, the signal isolation structure 5 can also be in other shapes, as long as it is arranged between the two cavities 121 to isolate the signal structure 5, it is within the protection scope of the present application.

[0101] In this embodiment, the signal isolation structure 5 is made of at least one of copper, aluminum, bakelite, and stainless steel. Specifically, copper and aluminum have excellent conductivity and shielding properties, can effectively shield electromagnetic interference and high-frequency signal crosstalk, and improve the anti-interference ability of the sensor; bakelite is an excellent insulating material that can isolate the propagation of electrical signals and prevent the signal from propagating to the receiving end through the substrate 11; stainless steel has outstanding mechanical strength and corrosion resistance, and can also block the signal propagation path to a certain extent; the isolation structure using conductive materials (such as copper, aluminum) or insulating materials (such as bakelite) can effectively reduce the crosstalk between the signal transmitting end and the receiving end, and the best material can be selected according to the specific application scenario to ensure the stability and accuracy of the sensor measurement.

[0102] Preferably, the materials of the rubber sleeve 3, the shell 1 and the signal isolation structure 5 all meet the food grade requirements. In the present embodiment, as a specific implementation method, the shell 1 can be made of ABS material, the metal ring can be made of 304 stainless steel material, the rubber sleeve 3 can be made of silicone material, and other food grade materials can also be used, all of which are within the protection scope of this application.

[0103] As a preferred embodiment of the above, continue to refer to Figure 2 , Figure 3 , and also includes an aluminum shell 4, in which the transmitting sensor 21 and the receiving sensor 22 are arranged. Specifically, on the one hand, the aluminum shell 4 has excellent conductivity and shielding performance, can effectively shield external electromagnetic interference and other environmental signals, ensure the independence and signal purity of the transmitting sensor 21 and the receiving sensor 22, and improve the stability of ultrasonic transmission and reception; on the other hand, the aluminum shell 4 can protect the transmitting sensor 21 and the receiving sensor 22 from external impact, vibration and mechanical damage, and improve the structural strength of the sensor.

[0104] In this embodiment, the end of the aluminum shell 4 is coated with a hydrophobic material. Specifically, in an environment with water or water vapor, if water droplets or water films are attached to the end of the aluminum shell 4, the ultrasonic signal may be refracted, reflected or attenuated, thereby affecting the measurement accuracy; the coating of the hydrophobic material can effectively reduce the condensation of water vapor at the end of the aluminum shell 4, avoid signal attenuation or interference caused by condensation, thereby significantly improving the stability of signal transmission and the accuracy of the measurement results; in addition, the hydrophobic coating can also reduce the adhesion of water droplets, dust and pollutants, and reduce the cleaning frequency and maintenance requirements of the sensor.

[0105] Among them, the hydrophobic material includes a bottom layer of hydroxyl-modified resin, a middle layer of silica, an outer layer of perfluoropolyether siloxane or a bottom layer of modified polyester resin, a middle layer of fluorinated silica, and an outer layer of perfluoroalkyl siloxane. The material combination of the three-layer structure design (bottom layer, middle layer, and outer layer) gives the hydrophobic coating excellent hydrophobic properties, and water droplets form a high contact angle (superhydrophobic property) on the surface, which effectively prevents water droplets or water vapor from adhering to the surface of the aluminum shell 4. The chemically modified structure of the bottom layer and the middle layer (such as fluorinated silica and silica layer) forms a multi-level micro-nano rough surface, which synergizes with the perfluoropolyether siloxane or perfluoroalkyl siloxane of the outer layer to further enhance the superhydrophobic effect.

[0106] As a preferred embodiment of the above embodiment, the aluminum shell 4 is first potted with silicone with a hardness of 45 to 60 Shore hardness; the rubber sleeve 3 is secondly potted with silicone with a hardness of 25 to 45 Shore hardness, preferably 30°. After many verifications, the inventor found that softer silicone cannot be used for both potting. If 30 Shore hardness is used for both potting, the test curve function will have obvious fluctuations and will not be smooth enough; if too hard silicone is used, the sensitivity will decrease. The two pottings with layered hardness design effectively balance the support and buffering effects, ensuring the stability of signal transmission and the smoothness of the test curve.

[0107] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A closed transceiver split semi-module ultrasonic sensor, characterized in that: include: A housing, an ultrasonic sensor and an intermediate structure made of at least a vibration absorbing material; The housing comprises a base plate and two cylindrical structures arranged in parallel on the base plate, each of the cylindrical structures being provided with a cavity; The ultrasonic sensor comprises a transmitting sensor, a receiving sensor, and leads respectively extending from the ends of the transmitting sensor and the receiving sensor, wherein the transmitting sensor and the receiving sensor are respectively arranged in the two cavities, and the leads are used to connect a circuit or a control system; The intermediate structure is at least partially disposed in the cavity, and the ultrasonic sensor is disposed in the intermediate structure.

2. The enclosed transceiver split semi-module ultrasonic sensor according to claim 1 is characterized in that: The intermediate structure is made entirely of foam or rubber material.

3. The enclosed transceiver split semi-module ultrasonic sensor according to claim 2 is characterized in that: The rubber is one of silica gel, nitrile rubber, thermoplastic elastomer, fluororubber, polyurethane, EPDM rubber, thermoplastic polyurethane elastomer and polymer gel material.

4. The enclosed transceiver split semi-module ultrasonic sensor according to claim 2, characterized in that: The intermediate structure is a rubber sleeve, and the rubber sleeve and the shell are fixed by tight fit.

5. The enclosed transceiver split semi-module ultrasonic sensor according to claim 4 is characterized in that: The contact position between the rubber sleeve and the shell is a surface-fitting structure.

6. The enclosed transceiver split semi-module ultrasonic sensor according to claim 5, characterized in that: The contact position between the rubber sleeve and the shell is a full-surface fitting structure.

7. The enclosed transceiver split semi-module ultrasonic sensor according to claim 5, characterized in that: The contact position between the rubber sleeve and the shell is a discontinuous surface fitting structure.

8. The enclosed transceiver split semi-module ultrasonic sensor according to claim 5, characterized in that: The contact position between the rubber sleeve and the shell is a surface fitting structure obtained after deformation under force.

9. The enclosed transceiver split semi-module ultrasonic sensor according to claim 4, characterized in that: The contact position between the rubber sleeve and the shell is a line fitting structure.

10. The enclosed transceiver split semi-module ultrasonic sensor according to claim 9, characterized in that: The outer circumferential surface of the rubber sleeve includes a plurality of annular protrusion structures arranged at intervals, and the protrusion structures are linearly fitted with the inner wall of the shell.

11. The enclosed transceiver split semi-module ultrasonic sensor according to claim 9, characterized in that: The outer circumferential surface of the rubber sleeve includes a plurality of protrusion structures arranged at intervals along the height direction, and the protrusion structures are linearly fitted with the inner wall of the shell.

12. The enclosed transceiver split semi-module ultrasonic sensor according to claim 4, characterized in that: The contact position between the rubber sleeve and the shell is a point-fitting structure.

13. The enclosed transceiver split semi-module ultrasonic sensor according to claim 12, characterized in that: The outer circumferential surface of the rubber sleeve is provided with a plurality of convex point structures, and the convex point structures are point-fitted with the inner wall of the shell.

14. The enclosed transceiver split semi-module ultrasonic sensor according to claim 2, characterized in that: The intermediate structure is a rubber sleeve, a gap is set between the rubber sleeve and the shell, and the rubber sleeve is fixed by a limiting structure.

15. The enclosed transceiver split semi-module ultrasonic sensor according to claim 14, characterized in that: The limiting structure includes a covering structure arranged on the rubber sleeve and the end of the shell.

16. The enclosed transceiver split semi-module ultrasonic sensor according to claim 15, characterized in that: The covering structure is that the shell end at least partially covers the rubber sleeve end.

17. The enclosed transceiver split semi-module ultrasonic sensor according to claim 15, characterized in that: The covering structure is that the end of the rubber sleeve at least partially covers the end of the shell.

18. The enclosed transceiver split semi-module ultrasonic sensor according to claim 14, characterized in that: The limiting structure includes a covering structure arranged between the rubber sleeve and the shell.

19. The enclosed transceiver split semi-module ultrasonic sensor according to claim 15 or 18, characterized in that: The covering structure includes a convex edge protruding inwardly from the shell along the circumferential direction, and the rubber sleeve is recessed along the circumferential direction to form a groove, and the convex edge is arranged in the groove.

20. The enclosed transceiver split semi-module ultrasonic sensor according to claim 15 or 18, characterized in that: The covering structure comprises a groove which is recessed along the circumferential direction of the shell, and the rubber sleeve is provided with a convex edge which protrudes along the circumferential direction, and the convex edge is arranged in the groove.

21. The enclosed transceiver split semi-module ultrasonic sensor according to claim 20, characterized in that: The convex edge and the groove are both integral.

22. The enclosed transceiver split semi-module ultrasonic sensor according to claim 20, characterized in that: The convex edge and the concave groove are both discontinuous.

23. The enclosed transceiver split semi-module ultrasonic sensor according to claim 20, characterized in that: The convex edge is discontinuous, and the groove is integral.

24. The enclosed transceiver split semi-module ultrasonic sensor according to claim 14, characterized in that: An anti-tilt structure is provided in the gap between the rubber sleeve and the housing.

25. The enclosed transceiver split semi-module ultrasonic sensor according to claim 24, characterized in that: The anti-tilt structure includes a protrusion arranged on the outer circumferential surface of the rubber sleeve.

26. The enclosed transceiver split semi-module ultrasonic sensor according to claim 25, characterized in that: The raised portion comprises an annular structure which is arranged along the entire outer circumference of the rubber sleeve.

27. The enclosed transceiver split semi-module ultrasonic sensor according to claim 25, characterized in that: The raised portion comprises a strip structure arranged along the height direction of the rubber sleeve.

28. The enclosed transceiver split semi-module ultrasonic sensor according to claim 25, characterized in that: The raised portion comprises a strip structure which is intermittently arranged along the outer circumferential surface and / or the height direction of the rubber sleeve.

29. The enclosed transceiver split semi-module ultrasonic sensor according to claim 25, characterized in that: The raised portion comprises a dot-shaped structure arranged along the outer circumferential surface of the rubber sleeve.

30. The enclosed transceiver split semi-module ultrasonic sensor according to claim 25, characterized in that: The protrusion is clearance-matched with the side wall of the housing.

31. The enclosed transceiver split half-module ultrasonic sensor according to claim 30, characterized in that: The gap between the protrusion and the side wall of the shell is 0.2mm to 0.5mm.

32. The enclosed transceiver split semi-module ultrasonic sensor according to claim 14, characterized in that: The housing and the rubber sleeve are provided with sealing structures at least at their ends.

33. The enclosed transceiver split semi-module ultrasonic sensor according to claim 32, characterized in that: The sealing structure comprises a waterproof strip which is arranged on the outer circumferential surface of the rubber sleeve and extends radially, and the waterproof strip is squeezed with the inner wall of the shell to form a seal.

34. The enclosed transceiver split semi-module ultrasonic sensor according to claim 32, characterized in that: The sealing structure comprises an umbrella-shaped waterproof structure seal arranged at the end of the rubber sleeve, the end surface of the shell is provided with a waterproof groove, and the umbrella-shaped waterproof structure is arranged in the waterproof groove.

35. The enclosed transceiver split semi-module ultrasonic sensor according to claim 32, characterized in that: The sealing structure comprises a covering structure which is arranged at the end of the rubber sleeve and extends out of the shell, and the covering structure covers the end of the shell to form a seal.

36. The enclosed transceiver split semi-module ultrasonic sensor according to claim 35, characterized in that: The outer surface of the covering structure is provided with a convex structure protruding outwards.

37. The enclosed transceiver split semi-module ultrasonic sensor according to claim 1, characterized in that: A fixing part is arranged on the substrate between the two cavities, and a signal isolation structure is arranged on the fixing part.

38. The enclosed transceiver split semi-module ultrasonic sensor according to claim 37, characterized in that: The fixing part comprises a cylinder arranged on the base plate for the water supply pipe to pass through, and the cylinder is provided with a ring structure for isolating signals.

39. The enclosed transceiver split semi-module ultrasonic sensor according to claim 37, characterized in that: The fixing part comprises a pit arranged on the substrate, and a plate-shaped structure for isolating signals is arranged on the pit.

40. The enclosed transceiver split half-module ultrasonic sensor according to claim 37, characterized in that: The signal isolation structure is made of at least one of copper, aluminum, bakelite and stainless steel.

41. The enclosed transceiver split semi-module ultrasonic sensor according to claim 4 or 14, characterized in that: It also includes an aluminum shell, and the transmitting sensor and the receiving sensor are arranged in the aluminum shell.

42. The enclosed transceiver split semi-module ultrasonic sensor according to claim 41, characterized in that: The ends of the aluminum shell are coated with a hydrophobic material.

43. The enclosed transceiver split semi-module ultrasonic sensor according to claim 42, characterized in that: The hydrophobic material comprises a bottom layer of hydroxyl-modified resin, a middle layer of silica, and an outer layer of perfluoropolyether siloxane, or a bottom layer of modified polyester resin, a middle layer of fluorinated silica, and an outer layer of perfluoroalkyl siloxane.

44. The enclosed transceiver split half-module ultrasonic sensor according to claim 41, characterized in that: The aluminum shell is potted for the first time with silicone having a hardness of 45 to 60 Shore hardness; the rubber sleeve is potted for the second time with silicone having a hardness of 25 to 45 Shore hardness.

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