Vehicle-mounted ultrasonic radar

Abstract

The embodiment of the utility model provides a vehicle-mounted ultrasonic radar. One end of the shell is provided with an opening; the probe core is assembled in the opening; one end of the probe core is exposed from the opening; the control circuit board is assembled in the shell and is electrically connected with the probe core to control the working state of the probe core; one end of the rotating seat is inserted into the opening of the shell as a pivoting end and is pivoted in the opening of the shell by virtue of a rotating shaft; the locking structure is arranged between the rotating seat and the shell and is used for locking the rotating seat when the rotating seat rotates to a preset angle relative to the shell; and the probe core is fixed on the rotating seat and is electrically connected with the control circuit board through the conductive holding element. According to the embodiment, the rotating seat and the locking structure are additionally arranged, an operator can enable the rotating seat to rotate around the pivot to drive the probe core to adjust the wave emitting angle, the probe core can be always electrically connected with the control circuit board through the conductive holding element during rotation, and after the probe core is adjusted in place, the rotating seat is locked relative to the shell through the locking structure; therefore, the wave sending detection angle can be flexibly adjusted.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to ultrasonic detection equipment technical field, especially a kind of vehicle-mounted ultrasonic radar. BACKGROUND

[0002] The existing vehicle-mounted ultrasonic radar mainly includes a shell with an opening, a probe core fixedly assembled in the shell and exposed from the opening for emitting detection waves and receiving echo, and a control circuit board assembled in the shell and electrically connected with the probe core to control the working state of the probe core.

[0003] However, the inventor found in the specific implementation that when installing the vehicle-mounted ultrasonic radar, it is usually necessary to adjust the wave-emitting detection angle of the vehicle-mounted ultrasonic radar flexibly in combination with the installation position, and since the probe core of the existing vehicle-mounted ultrasonic radar is fixedly assembled in the shell and cannot adjust the angle of the probe core relative to the shell, the installation angle of the vehicle-mounted ultrasonic radar can only be adjusted as a whole, resulting in great difficulty in installation. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the embodiment of the utility model is to provide a vehicle-mounted ultrasonic radar capable of flexibly adjusting the wave-emitting detection angle.

[0005] To solve the above technical problems, the embodiment of the utility model provides the following technical scheme: a vehicle-mounted ultrasonic radar, comprising a shell with an opening, a probe core assembled in the opening and exposed from the opening, a control circuit board assembled in the shell and electrically connected with the probe core to control the working state of the probe core, a rotating seat inserted into the opening of the shell with one end as a pivot joint end and pivotally connected to the opening of the shell by means of a rotating shaft, and a locking structure provided between the rotating seat and the shell for locking the rotating seat when the rotating seat is rotated relative to the shell to a predetermined angle, wherein the probe core is fixed to the rotating seat and electrically connected with the control circuit board by means of a conductive retaining element.

[0006] Further, the locking structure comprises an arc-shaped tooth groove extending along a circumferential surface coaxial with the rotating shaft and a protruding tooth for corresponding clamping cooperation with the arc-shaped tooth groove, one of the arc-shaped tooth groove and the protruding tooth is provided on the inner wall of the shell, and the other is provided on the pivot joint end outer wall of the rotating seat.

[0007] Further, the pivot joint end of the rotating seat has two sides facing outward and coaxially protruding to form two rotating shafts, and a protruding tooth is formed in the middle of the pivot joint end side surface between the two rotating shafts, and the inner wall of the opening is correspondingly formed with a shaft hole for inserting the rotating shaft and the arc-shaped tooth groove for clamping cooperation with the protruding tooth.

[0008] Further, opposite two side edges of the end of the pivot end are further protruded to form first plug-in elastic sheets, and outer sides of each of the first plug-in elastic sheets are further protruded to form the rotating shafts.

[0009] Further, the edge part between the two rotating shafts of the end of the pivot end is further protruded to form second plug-in elastic sheets, and the protruding teeth are arranged on the outer sides of each of the second plug-in elastic sheets.

[0010] Further, the conductive holding element is a flexible and redundant conductive wire, and opposite two ends of the conductive wire are electrically connected with the probe core and the control circuit board respectively; or the conductive holding element comprises a conductive column with a circular cross section and a plug-in seat for coaxial plug-in with the conductive column, and the conductive column and the plug-in seat are coaxially arranged with the rotating shafts and one of them is fixed on the rotating seat and electrically connected with the probe core while the other is fixed on the shell and electrically connected with the control circuit board.

[0011] Further, one end of the probe core is provided with flanges on two sides respectively, the rotating seat comprises a base forming the pivot end, a vibration-absorbing bushing tightly sleeved on the outer side of one end of the probe core and wrapping the flanges, and a locking sleeve sleeved on the outer side of the vibration-absorbing bushing, an outer side wall of the base is protruded to form a positioning protrusion, an inner wall of one end of the locking sleeve is formed with an inner ring edge while an inner wall of the other end is recessed to form an annular groove, the locking sleeve is abutted on the vibration-absorbing bushing with the inner ring edge, and the positioning protrusion of the base is accommodated in the annular groove of the locking sleeve so that the vibration-absorbing bushing and the probe core are clamped and fixed by the locking sleeve and the base.

[0012] Further, a through hole is further arranged in the middle part of the base, one end of the vibration-absorbing bushing towards the base is provided with a positioning protruding ring inserted into the through hole, and wave-absorbing cotton is further assembled in the inner hole of the positioning protruding ring, and the wave-absorbing cotton is provided with an upper through hole for the conductive holding element to pass through.

[0013] Further, the probe core comprises a resonance shell forming a resonance cavity and a piezoelectric ceramic sheet fixed in the middle part of the cavity bottom wall of the resonance cavity, one end of the piezoelectric ceramic sheet is connected with the conductive holding element, and the resonance cavity is further filled with a first sealing glue covering one end of the conductive holding element and the piezoelectric ceramic sheet.

[0014] Further, a hollow connecting barrel is formed in the middle of one end of the shell, an inner hole opening of the connecting barrel forms the opening, an inner wall of the connecting barrel is formed with a stop ring for abutting and limiting the pivoting end of the rotating seat near the opening, a mounting port is formed in a side wall of the shell opposite to the opening, a glue blocking plate is assembled in the shell to block the inner hole of the stop ring, a lower through hole is formed in the glue blocking plate for the conductive holding element to pass through, a glue injection cavity is formed between the mounting port and the stop ring of the shell, the control circuit board is loaded into the glue injection cavity of the shell through the mounting port, and the glue injection cavity is also filled with a second sealing glue for covering the control circuit board.

[0015] After the technical scheme is applied, the utility model discloses at least the following beneficial effects: the utility model discloses a rotating seat with one end as a pivoting end is inserted into the opening of the shell and is pivoted in the opening of the shell by the aid of the rotating shaft, the probe core is fixed on the rotating seat, during specific installation, the operator can make the rotating seat rotate around the pivot and drive the probe core to adjust the wave emission angle, since the probe core is electrically connected with the control circuit board through the conductive holding element, the probe core can always be electrically connected with the control circuit board during rotation, when adjustment is in place, the rotating seat is locked relative to the shell through the locking structure, and flexible adjustment of the wave emission detection angle can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a split structure schematic view of an optional embodiment of the utility model vehicle-mounted ultrasonic wave radar.

[0017] Figure 2 It is a split structure schematic view of an optional embodiment of the utility model vehicle-mounted ultrasonic wave radar after being inverted.

[0018] Figure 3 It is an assembly structure schematic view of an optional embodiment of the utility model vehicle-mounted ultrasonic wave radar.

[0019] Figure 4 It is a cross-sectional structure schematic view of an optional embodiment of the utility model vehicle-mounted ultrasonic wave radar along two second plug-in spring sheets.

[0020] Figure 5 It is a cross-sectional structure schematic view of an optional embodiment of the utility model vehicle-mounted ultrasonic wave radar along two first plug-in spring sheets. DETAILED DESCRIPTION

[0021] The application will be described in further detail below with reference to the drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the application and are not intended to limit the application, and the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0022] As Figures 1-5 shown, the utility model discloses a kind of vehicle-mounted ultrasonic radar of an alternative embodiment, including the shell 1 with the opening 10 in one end, the probe core 3 assembled in the opening 10 and one end from the opening 10 exposes, the control circuit board 5 assembled in the shell 1 and with the probe core 3 electrical connection to control the working state of the probe core 3, the rotating seat 7 with one end as pivot joint end 7a inserted in the opening 10 of the shell 1 and pivot joint in the opening 10 of the shell 1 by means of rotating shaft 70, and the locking structure 9 for being used for when the rotating seat 7 relative to shell 1 rotates to predetermined angle, locking the rotating seat 7 between the rotating seat 7 and the shell 1, the probe core 3 is fixed on the rotating seat 7 and is electrically connected with the control circuit board 5 by conductive holding element 30.

[0023] The utility model embodiment adds the rotating seat 7 with one end as pivot joint end 7a inserted in the opening 10 of the shell 1 and pivot joint in the opening 10 of the shell 1 by means of rotating shaft 70, by fixing the probe core 3 on the rotating seat 7, when installing specifically, operating personnel can make rotating seat 7 rotate around pivot 70 and then drive probe core 3 to adjust wave angle, since probe core 3 is electrically connected with the control circuit board 5 by conductive holding element 30, therefore, probe core 3 can always keep electrical connection with control circuit board 5 when rotating, when adjusting in place, the rotating seat 7 is locked relative to shell 1 by locking structure 9, that is, the flexible adjustment of wave detection angle can be realized.

[0024] In an alternative embodiment of the utility model, as Figures 1-4 shown, the locking structure 9 includes arc-shaped tooth slot 90 extending along the circumferential surface coaxial with the rotating shaft 70 and convex tooth 92 for corresponding clamping cooperation with the arc-shaped tooth slot 90, one of the arc-shaped tooth slot 90 and the convex tooth 92 is arranged on the inner wall of the shell 1, and the other is arranged on the pivot joint end 7a outer wall of the rotating seat 7. In this embodiment, the locking structure 9 includes arc-shaped tooth slot 90 and convex tooth 92, when the probe core 3 is rotated in place, the convex tooth 92 is clamped in a corresponding arc-shaped tooth slot 90, the angle positioning of the rotating seat 7 and the shell 1 can be very simple, the structure is simple, and adjustment is convenient. It can be understood that there are many forms of structures that can realize angle positioning locking, for example: a bolt is arranged parallel to the rotating shaft 70 and passes through the arc-shaped slot on the shell 1 extending around the rotating shaft 70 and is locked in the corresponding threaded hole on the pivot joint end 7a.

[0025] In an alternative embodiment of the utility model, as Figures 1-5As shown, the opposite two side faces of the pivot end 7a of the rotating seat 7 outwardly coaxially protrude to form each a rotating shaft 70, and the middle part of the side face of the pivot end 7a between the two rotating shafts 70 forms each a protruding tooth 92, and the inner wall of the opening 10 correspondingly forms a shaft hole 12 for inserting the rotating shaft 70 and the arc-shaped tooth groove 90 for clamping and matching with the protruding tooth 92. In the embodiment, the side face of the rotating seat 7 forms the rotating shaft 70 and the protruding tooth 92 respectively, and the inner wall of the opening 10 correspondingly forms the shaft hole 12 and the arc-shaped tooth groove 90 respectively, so that the structure is simple, and the assembly and the adjustment of the wave angle are convenient.

[0026] In an optional embodiment of the utility model, as shown in Figures 1-2 and Figure 4 The opposite two side edges of the end of the pivot end 7a further protrude to form a first insertion elastic sheet 72 respectively, the outer side face of each first insertion elastic sheet 72 protrudes to form the rotating shaft 72 respectively, the shell 1 is equipped with a shaft hole 12 on the inner wall of the opposite two sides of the opening 10 respectively, the rotating seat 7 inserts into the opening 10 with the first insertion elastic sheet 72, and the first insertion elastic sheet 72 elastically deforms to make the rotating shaft 72 keep inserting into the corresponding shaft hole 12. In the embodiment, when assembling, the pivot end 7a of the rotating seat 7 inserts into the opening 10 of the shell 1 through the first insertion elastic sheet 72, the first insertion elastic sheet 72 can elastically deform appropriately to make the rotating shaft 72 insert into the corresponding shaft hole 12 of the inner wall of the shell 1, so that the assembly is more convenient.

[0027] In an optional embodiment of the utility model, as shown in Figures 1-2 and Figure 4 The edge part between the two rotating shafts 70 of the end of the pivot end 7a further protrudes to form a second insertion elastic sheet 74 respectively, and the protruding tooth 92 is arranged on the outer side face of each second insertion elastic sheet 74. In the embodiment, when rotating the rotating seat 7 to adjust the wave angle of the probe core 3, the second insertion elastic sheet 74 can elastically deform appropriately, so that the protruding tooth 92 can more conveniently enter and exit the corresponding arc-shaped tooth groove 90.

[0028] In the specific implementation, the cross section of each protruding tooth 92 and each tooth groove in the arc-shaped tooth groove 90 is designed as a V-shaped cross section that is matched with each other, so that the protruding tooth 92 can more conveniently enter and exit the arc-shaped tooth groove 90 and can be correspondingly clamped and positioned in any tooth groove in the arc-shaped tooth groove 90.

[0029] In an optional embodiment of the utility model, as shown in Figures 1-2 and Figures 4-5As shown, the conductive holding element 30 is a flexible and redundant wire, the opposite ends of which are electrically connected with the probe core 3 and the control circuit board 5 respectively; or, the conductive holding element comprises a conductive column with a circular cross section and a socket for coaxially plugging with the conductive column, the conductive column and the socket are coaxially arranged with the rotating shaft 70 and one of them is fixed on the rotating seat 7 and electrically connected with the probe core 3 while the other is fixed on the shell 1 and electrically connected with the control circuit board 5. The present embodiment provides various specific implementations of the conductive holding element 30 for selection, wherein the conductive holding element 30 adopts a flexible and redundant wire, which is simple in structure, convenient to assemble and low in cost; and the rotating conductive structure composed of the conductive column and the socket can also realize the electrical connection between the probe core 3 and the control circuit board 5, the performance of the conductive holding is more stable, and the structure is more durable.

[0030] In the implementation and assembly, the two ends of the wire can be directly welded to the probe core 3 and the control circuit board 5, or as shown in Figures 1 to 2 , a plug connector 301 is welded to at least one end of the wire and is plugged into the conductive socket or the conductive jack 50 fixed on the probe core 3 and the control circuit board 5 respectively to realize the electrical connection. In addition, in order to realize the electrical connection between the probe core 3 and the control circuit board 5 during the rotation, the conductive holding element 30 can also be implemented in many ways, such as a conductive ring, a conductive spring, an elastic conductive thimble or a conductive ball, which will not be described here.

[0031] In an optional embodiment of the present application, Figures 1-2 and Figure 4As shown, one end of the probe core 3 is provided with flanges 32 on both sides, the rotating seat 7 includes a base 75 with a pivot end 7a at one end, a vibration absorbing bushing 76 tightly sleeved outside one end of the probe core 3 and wrapping the flanges 32, and a locking sleeve 77 sleeved outside the vibration absorbing bushing 76, the outer wall of the base 75 is provided with a positioning protrusion 751 around the periphery, the inner wall of one end of the locking sleeve 77 is provided with an inner ring edge 771, and the inner wall of the other end is recessed to form an annular groove 773, the locking sleeve 77 is abutted on the vibration absorbing bushing 76 by the inner ring edge 771, and the positioning protrusion 751 of the base 75 is accommodated in the annular groove 773 of the locking sleeve 77, so that the vibration absorbing bushing 76 and the probe core 3 are clamped and fixed by the cooperation of the locking sleeve 77 and the base 75. In the embodiment, the rotating seat 7 includes the base 75, the vibration absorbing bushing 76 and the locking sleeve 77, the vibration absorbing bushing 76 and the probe core 3 are effectively clamped and positioned on the base 75 by abutting the locking sleeve 77 on the vibration absorbing bushing 76 by the inner ring edge 771 and accommodating the positioning protrusion 751 of the base 75 in the annular groove 773 of the locking sleeve 77, which is simple in structure and convenient to assemble.

[0032] In addition, as shown in Figures 1-5 The part of the probe core 3 exposed outside the vibration absorbing bushing 76 is also sleeved with an outer sleeve ring 78. In the embodiment, the outer sleeve ring 78 can conduct the vibration of the top end part of the probe core 3 and reduce the interference by being arranged.

[0033] In an optional embodiment of the utility model, as shown in Figures 1-2 and Figure 4 、 Figure 5 The middle part of the base 75 is also provided with a through hole 753, one end of the vibration absorbing bushing 76 towards the base 75 is provided with a positioning convex ring 761 inserted into the through hole 753, and the inner hole of the positioning convex ring 761 is also assembled with wave absorbing cotton 79, and the wave absorbing cotton 79 is provided with an upper through hole 791 through which the conductive retaining element 30 passes. In the embodiment, the vibration absorbing bushing 76 can be pre-positioned on the through hole 753 of the base 75 through the positioning convex ring 761, so as to avoid position deviation during assembly; the wave absorbing cotton 79 is assembled in the inner hole of the positioning convex ring 761, so that the wave absorbing cotton 79 can absorb the interference clutter conducted from the middle part of the probe core 3, so as to avoid affecting the circuit structure on the control circuit board 5; and the upper through hole 791 is arranged on the wave absorbing cotton 79, so as to facilitate the arrangement of the conductive retaining element 30.

[0034] In an optional embodiment of the utility model, as shown in Figures 1-2 and Figures 4-5As shown, the probe core 3 comprises a resonance shell 33 formed with a resonance cavity 321 and a piezoelectric ceramic sheet 34 fixed to the middle part of the cavity bottom wall of the resonance cavity 331, the piezoelectric ceramic sheet 34 is connected with one end of the conductive holding element 30, and the resonance cavity 331 is also filled with a first sealing glue 332 covering the one end of the conductive holding element 30 and the piezoelectric ceramic sheet 34. In the embodiment, the one end of the conductive holding element 30 is electrically connected with the piezoelectric ceramic sheet 34, and the resonance cavity 331 is filled with the first sealing glue 332, which can not only realize stable fixation, but also effectively avoid resonance of the conductive holding element 30.

[0035] In an optional embodiment of the utility model, as shown in Figures 1-2 and Figure 4 、 Figure 5 As shown, the middle part of one end of the shell 1 is outwardly convex to form a hollow connecting barrel 13, the inner hole orifice of the tail end of the connecting barrel 13 constitutes the opening 10, the inner wall of the connecting barrel 13 is convex to form a stop ring 131 for abutting and limiting the pivot end 7a of the rotating seat 7 near the opening 10, the side wall of the shell 1 opposite to the opening 10 is provided with a mounting port 14, the shell 1 is assembled with a glue blocking plate 16 blocking the inner hole of the stop ring 131, the glue blocking plate 16 is provided with a lower through hole 161 for the conductive holding element 30 to pass through, the shell 1 forms a glue injection cavity 18 between the mounting port 14 and the stop ring 131, the control circuit board 5 is loaded into the glue injection cavity 18 of the shell 1 via the mounting port 14, and the glue injection cavity 18 is also filled with a second sealing glue 19 for covering the control circuit board 5. In the embodiment, since the probe core 3 is movably assembled at the opening 10 through the rotating seat 7, it is usually difficult to realize sealing and waterproof between the rotating seat 7 and the opening 10, in order to ensure that the circuit devices on the control circuit board 5 are not interfered by external water vapor and realize long-term stable work, the glue injection cavity 18 is formed between the mounting port 14 and the stop ring 131, the second sealing glue 19 is filled in the glue injection cavity 18, the sealing protection of the control circuit board 5 is realized, and the second sealing glue 19 is also prevented from flowing into the rotating seat 7 through the inner hole of the stop ring 131 by arranging the glue blocking plate 16.

[0036] Specific implementation, as Figures 1-2 and Figures 4-5 As shown, the conductive holding element 30 is a flexible and redundant wire, the wire is welded on the piezoelectric ceramic sheet 34 first and then inserted into the shell 1, therefore, the glue blocking plate 16 and the wave-absorbing cotton 79 are respectively provided with cut seams for the wire to be loaded into the corresponding upper through hole 791 and lower through hole 161.

[0037] The embodiments of the present application are described above with reference to the drawings; however, the present application is not limited to the specific embodiments described above, but the specific embodiments described above are merely illustrative rather than restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and these all belong to the protection scope of the present application.

Claims

1. A vehicle-mounted ultrasonic wave radar comprising a housing having an opening at one end, a probe core assembled in the opening and having one end exposed from the opening, and a control circuit board assembled in the housing and electrically connected to the probe core to control an operating state of the probe core, characterized in that, The vehicle-mounted ultrasonic radar further comprises a rotating seat with one end inserted into the opening of the shell as a pivot end and pivoted to the opening of the shell by a rotating shaft, and a locking structure arranged between the rotating seat and the shell for locking the rotating seat when the rotating seat is rotated to a predetermined angle relative to the shell, the probe core is fixed to the rotating seat and electrically connected to the control circuit board by a conductive retaining element.

2. The vehicle-mounted ultrasonic wave radar according to claim 1, wherein The locking structure comprises an arc-shaped tooth groove extending along a circumferential surface coaxial with the rotating shaft and a protruding tooth for corresponding clamping fitting with the arc-shaped tooth groove, one of the arc-shaped tooth groove and the protruding tooth is arranged on the inner wall of the shell and the other is arranged on the pivot end outer wall of the rotating seat.

3. The vehicle-mounted ultrasonic wave radar according to claim 2, wherein The opposite sides of the pivot end of the rotating seat protrude coaxially to form two rotating shafts, and the middle part of the pivot end between the two rotating shafts forms a protruding tooth, and the inner wall of the opening is correspondingly formed with a shaft hole for inserting the rotating shaft and an arc-shaped tooth groove for clamping fitting with the protruding tooth.

4. The vehicle-mounted ultrasonic wave radar according to claim 3, wherein The opposite side edges of the end of the pivot end are further protruded to form first plug-in elastic tabs, the outer side of each first plug-in elastic tab is protruded to form a rotating shaft, the rotating seat is inserted into the opening by the first plug-in elastic tabs, and the first plug-in elastic tabs are elastically deformed to keep the rotating shafts inserted into the corresponding shaft holes.

5. The vehicle-mounted ultrasonic wave radar according to claim 3 or 4, characterized by The edge part of the end of the pivot end between the two rotating shafts is further protruded to form a second plug-in elastic tab, and the protruding tooth is arranged on the outer side of each second plug-in elastic tab.

6. The vehicle-mounted ultrasonic wave radar according to claim 1, wherein The conductive retaining element is a flexible and redundant conductive wire, the opposite ends of the conductive wire are respectively electrically connected to the probe core and the control circuit board; or the conductive retaining element comprises a conductive column with a circular cross section and a plug-in seat for coaxial plug-in fitting with the conductive column, the conductive column and the plug-in seat are coaxially arranged with the rotating shaft and one of them is fixed to the rotating seat and electrically connected to the probe core and the other is fixed to the shell and electrically connected to the control circuit board.

7. The vehicle-mounted ultrasonic wave radar according to claim 1, wherein One end of the probe core is provided with a flange on both sides, the rotating seat comprises a base forming the pivot end, a vibration-absorbing bushing tightly sleeved on the outer side of one end of the probe core and wrapping the flange, and a locking sleeve sleeved outside the vibration-absorbing bushing, the outer side wall of the base is protruded to form a positioning protrusion, the inner wall of one end of the locking sleeve is formed with an inner ring edge and the inner wall of the other end is recessed to form an annular groove, the locking sleeve is abutted on the vibration-absorbing bushing by the inner ring edge, and the positioning protrusion of the base is accommodated in the annular groove of the locking sleeve, and the vibration-absorbing bushing and the probe core are clamped and fixed by the cooperation of the locking sleeve and the base.

8. The vehicle-mounted ultrasonic wave radar according to claim 7, wherein The middle part of the base is further provided with a through hole, one end of the vibration-absorbing bushing towards the base is provided with a positioning protruding ring inserted into the through hole, and wave-absorbing cotton is further assembled in the inner hole of the positioning protruding ring, and the wave-absorbing cotton is provided with an upper perforation for the conductive retaining element to pass through.

9. The vehicle-mounted ultrasonic wave radar according to claim 1 or 6, characterized by The probe core comprises a resonance shell with a resonance cavity and a piezoelectric ceramic sheet fixed to the middle of the cavity bottom wall, the piezoelectric ceramic sheet is connected with one end of the conductive holding element, and the resonance cavity is filled with a first sealant covering the one end of the conductive holding element and the piezoelectric ceramic sheet.

10. The vehicle-mounted ultrasonic radar according to claim 1, wherein The middle of one end of the shell is outwardly convex to form a hollow connecting cylinder, the inner hole orifice of the end of the connecting cylinder constitutes the opening, the inner wall of the connecting cylinder is convex to form a stop ring for abutting and limiting the pivoting end of the rotating seat near the opening, a mounting port is formed in the side wall of the shell opposite to the opening, a stop glue plate is assembled in the shell to shield the inner hole of the stop ring, a lower through hole is arranged on the stop glue plate for the conductive holding element to pass through, the shell forms a glue injection cavity between the mounting port and the stop ring, the control circuit board is loaded into the glue injection cavity of the shell via the mounting port, and the glue injection cavity is further filled with a second sealant for covering the control circuit board.

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