JP6296417B2 - Ultrasonic sensor device - Google Patents

Description

  The present invention relates to an ultrasonic sensor device employed in a vehicle obstacle detection device, an automatic door device, and various other devices, and a vehicle obstacle detection device including the ultrasonic sensor device.

  Some vehicles in recent years are equipped with an obstacle detection device including an ultrasonic sensor device attached to a bumper of a vehicle and a controller connected to the ultrasonic sensor (see Patent Document 1). In the ultrasonic sensor device, a sensor unit (ultrasonic microphone) that transmits and receives ultrasonic waves is mounted in the bumper so as to be exposed to the outside from a through hole formed in the bumper of the vehicle. However, since a structure such as a reinforcing material exists in the bumper, the ultrasonic sensor device needs to be mounted at a position avoiding interference with them. On the other hand, the ultrasonic sensor device needs to be mounted on the bumper so that the detection range for detecting the obstacle covers a predetermined area around the vehicle. Therefore, since the current ultrasonic sensor must be mounted on the bumper so as to satisfy both of these, the mounting position in the bumper is limited, and there is almost no freedom in the mounting position.

JP-A-10-123235

  The subject of this invention is providing the ultrasonic sensor apparatus reduced in size so that the freedom degree of the mounting position in a bumper might improve.

Means for Solving the Problems and Effects of the Invention

In order to solve the above problems, an ultrasonic sensor device of the present invention
A sensor unit that transmits and / or receives ultrasonic waves from the tip surface, a circuit board connected to the sensor unit, a transformer that forms an electronic component mounted on the circuit board, and the tip surface externally A housing that houses the sensor unit, the circuit board, and the transformer in a form exposed to
The transformer is not adjacent to the orthogonal direction orthogonal to the tip surface of the sensor unit, and is arranged adjacent to the outside of the outer periphery of the tip surface ,
The housing is connected to a housing portion for housing the transformer, a cylindrical portion in which the sensor portion is disposed, and a terminal portion having a predetermined shape at the tip of the wiring member, and the wiring member and the circuit board are connected to each other. The connector portions to be connected are arranged in a straight line in this order, and are formed in a longitudinal shape whose longitudinal direction is the arrangement direction .

  According to the configuration of the present invention described above, the ultrasonic sensor mounted on the bumper has a thin shape extending in the spreading direction of the bumper surface by reducing the thickness in the direction toward the vehicle perpendicular to the bumper surface as compared with the conventional case. can do. By reducing the thickness in the direction toward the vehicle to a thin shape, the possibility of interference with the structure in the bumper is greatly reduced, and the degree of freedom of arrangement in the bumper can be increased.

The perspective view which showed one Embodiment of the ultrasonic sensor apparatus of this invention. The disassembled perspective view of the ultrasonic sensor apparatus of FIG. The perspective view of the circuit board of FIG. The top view of the ultrasonic sensor apparatus of FIG. The side view of the ultrasonic sensor apparatus of FIG. AA sectional drawing of FIG. BB sectional drawing of FIG. CC sectional drawing of FIG. The center sectional view of a transformer. FIG. 2 is an example of a block diagram illustrating an electrical configuration of the ultrasonic sensor device or obstacle detection device of FIG. 1.

  Hereinafter, each embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the ultrasonic sensor device 1 of this embodiment is connected to a controller (control unit) 10 via a wiring member 11 such as a wire harness to constitute an obstacle detection device 100.

  The obstacle detection device 100 according to the present embodiment is a vehicle obstacle detection device that is attached to a bumper 9 of a vehicle that forms a stationary member and detects an obstacle existing in a predetermined vehicle outer peripheral region. Furthermore, the obstacle detection device 100 of the present embodiment is a vehicle corner sonar in which the ultrasonic sensor device 1 is attached to a portion that forms the vehicle corner of the bumper 9 on the front side or the rear side of the vehicle.

  As shown in FIGS. 1 to 8, the ultrasonic sensor device 1 is connected to the sensor unit 2 that performs either or both of transmission and reception of ultrasonic waves from the distal end surface 2 </ b> A (see FIG. 6). A circuit board 3, a transformer 4 constituting an electronic component mounted on the circuit board 3, a housing 5 that houses the sensor unit 2, the circuit board 3, and the transformer 4 in such a manner that the front end surface 2 </ b> A is exposed outside Is provided. Further, the transformer 4 is not adjacent in the direction 2X (see FIG. 6) orthogonal to the front end surface 2A of the sensor unit 2, but is disposed adjacent to the outer side of the outer periphery of the front end surface 2A. As a result, the ultrasonic sensor device 1 of the present embodiment is not arranged in such a manner that the sensor unit 2 and the transformer 4 having a certain height are stacked in the height direction as in the prior art, but the sensor unit 2 and Since the transformer 4 and the transformer 4 are arranged side by side in the spreading direction of the surface of the bumper 9, the entire ultrasonic sensor device 1 is thinned.

  The sensor unit 2 constitutes either or both of an ultrasonic transmission unit and a reception unit. The sensor unit 2 of the present embodiment is a transmission / reception unit that performs both transmission and reception of ultrasonic waves. As shown in FIG. 10, the sensor unit 2 has a piezoelectric element 2P (see FIG. 6) that exhibits a piezoelectric effect and a reverse piezoelectric effect adhered in a metal casing (not shown) such as aluminum, and the capacitor 23 is made of silicon resin. Formed by molding. The resonance frequency of the sensor unit 2 is determined by bonding the piezoelectric element 2P inside a casing (not shown), for example, on the back side of the transmission / reception surface 2A. The piezoelectric element 2P is connected to the processing circuit 30 of the circuit board 3 through the wire harness 2W (see FIG. 6) and the connection terminal portion 32.

  Further, as shown in FIG. 6, the sensor unit 2 is fitted coaxially to a cylindrical part 52 formed on the first side in the longitudinal direction 5X of the housing 5. Thereby, as for the sensor part 2, 2 A of front end surfaces (ultrasonic wave transmission / reception surface in this embodiment) are exposed outside from the front-end opening part 52H of the cylindrical part 52. FIG. The cylindrical portion 52 is fitted into the through hole portion 9H of the bumper 9. Thereby, the front end surface (ultrasonic wave transmitting / receiving surface in the present embodiment) 2A of the sensor unit 2 is exposed to the outside (the vehicle outer side) of the bumper 9.

  Damping materials 6A and 6B made of rubber or the like are interposed between the cylindrical portion 52 and the sensor portion 2.

  The circuit board 3 has a processing circuit 30 (see FIG. 10) formed on its main surface 3A and main back surface 3B. That is, as shown in FIG. 8, the circuit board 3 mounts the transformer 4 and other various electric elements (not shown) to form a processing circuit 30. The circuit board 3 is connected to the connection terminal portion 53, and is connected to the controller 10 via the connection terminal portion 53 and the external wiring member 11.

  Further, as shown in FIGS. 1 and 3, the circuit board 3 is arranged in parallel with the surface of the bumper 9 in the housing 5. The circuit board 3 has a plate shape extending in the longitudinal direction 5X of the casing 5, is accommodated inside the casing 5, and is arranged so as to cover the rear end opening 5H. However, there is a slight gap between the circuit board 3 and the housing 5. The circuit board 3 is disposed in the housing 5 so as to face the sensor unit 2 on the opposite side of the front end surface 2A, and on the main surface 3A on the side of the circuit board 3 facing the sensor unit 2 on the main surface 3A. 4 is implemented.

  The transformer 4 is a signal boosting transformer and is mounted on the main surface 3 </ b> A of the circuit board 3. As shown in FIG. 6, the transformer 4 is accommodated in a bottomed accommodating portion 54 formed to bulge in the same direction as the cylindrical portion 52 on the second side in the longitudinal direction 5X of the housing 5. The

  As shown in FIG. 9, the transformer 4 includes a cylindrical casing 41 made of a metal material. In the casing 41, a ferrite core 42a and both coils 42b and 42g wound around the cylindrical portion of the ferrite core 42a are provided. The coil 42b serves as a primary coil of the transformer 4, and the coil 42g serves as a secondary coil of the transformer 4. The coil 42b is connected to the terminal 42e at one terminal 42c. The coil 42g is connected to the terminal 42f at one terminal 42d. The other terminals of both coils 42b and 42g are grounded. The terminals 42e and 42f are connected to the processing circuit 30.

  Moreover, the transformer 4 includes a lid member 43 made of ferrite, as shown in FIG. The lid member 43 is screwed into the casing 41 so that the ferrite core 42a and the coils 42b and 42g are coaxially covered by the cylindrical portion 43a. The lid member 43 is screwed into the casing 41 by being screwed into both female screw portions 41d formed on the peripheral wall of the casing 41 at a male screw portion 43b formed on the outer peripheral surface of the cylindrical portion 43a.

  The value of the inductance of the parallel resonance circuit to be described later can be adjusted by the screwing amount of the lid member 43 into the casing 41. In the conventional ultrasonic sensor device, the transformer is positioned so as to be arranged behind the sensor unit, and the lid member is located at the rear end of the transformer. Therefore, the screwing operation of the lid member into the casing (that is, the parallel resonance described above) The operation of adjusting the value of the inductance of the circuit was possible even after the transformer was mounted on the circuit board and the circuit board was placed in the housing. However, the lid member 43 of the present embodiment is disposed so as to face the bumper 9 side in the accommodating portion 54 of the housing 5 and is disposed so as to face the bottom of the accommodating portion 54. For this reason, after the transformer 4 is mounted on the circuit board 3 and the circuit board 3 is disposed in the housing 5, the screwing operation of the lid member 43 into the casing 41 becomes impossible. Therefore, in the present embodiment, a transformer 4 is prepared in which the inductance value of a parallel resonant circuit, which will be described later, is adjusted in consideration of deviation due to assembly, the adjusted transformer 4 is mounted on a circuit board, and a housing Assembling procedure (assembling method) of arranging in the 5 accommodating portions 54 is adopted.

  A circuit configuration among the sensor unit 2, the controller 10, and the processing circuit 30 will be described with reference to FIG.

  The parallel resonant circuit includes the piezoelectric element 2P, the capacitor 23, and the secondary coil 42c of the transformer 4. The processing circuit 30 includes a drive circuit 34, and the drive circuit 34 is controlled by the controller 10 to apply a drive voltage to the primary coil 42 b of the transformer 4. For this reason, the transformer 4 boosts the drive voltage, and the boosted drive voltage is generated in the secondary coil 42g. Along with this, mechanical vibration is generated in the sensor unit 2 forming the ultrasonic vibrator due to the piezoelectric effect of the piezoelectric element 2P. As a result, the sensor unit 2 transmits ultrasonic waves from the front end surface (transmission / reception surface) 2 </ b> A to the outside of the vehicle via the front end opening 52 </ b> H of the cylindrical portion 52 of the housing 5.

  When the transmitted ultrasonic wave is reflected by an obstacle located outside the vehicle, the sensor unit 2 forming the ultrasonic transducer receives the ultrasonic wave reflected by the front end surface (transmission / reception surface) 2A and transmits it to the piezoelectric element 2P. To do. At this time, the piezoelectric element 2P generates a piezoelectric voltage due to the inverse piezoelectric effect, and outputs this piezoelectric voltage to the amplifier circuit 33 via the parallel resonance circuit. Accordingly, the piezoelectric voltage is output to the controller 10 as a received signal via the amplifier circuit 33. The controller 10 amplifies the received signal, compares it with a threshold value, and detects that there is an obstacle when the level of the amplified received signal is higher than the threshold value.

  The structure of the housing 5 will be described.

  The housing 5 has the cylindrical portion 52 on the first side in the longitudinal direction 5X and the accommodating portion 54 on the second side in the longitudinal direction 5X on the front end side. In the cylindrical part 52, the sensor part 2 is inserted and arranged so that the front end face 2A is exposed to the outside on the front end side. The accommodating portion 54 has a structure having a bottom portion 54A on the front end side so that the transformer 4 is not exposed to the outside on the front end side, and accommodates the transformer 4. On the other hand, the housing 5 has a cylindrical rear end portion 51 in which a rear end opening 5H that opens rearward is formed on the rear end side. The rear end portion 51 communicates with the cylindrical portion 52 and the accommodating portion 54 on the rear end side, and the circuit board 3 is disposed inside. The cylindrical portion 52 and the accommodating portion 54 are partitioned and separated in a form having a wall portion 5K (see FIG. 6) between them. And although illustration is abbreviate | omitted, it molds with the resin with which the inside of the housing | casing 5 was filled from the rear-end opening part 5H.

  The housing 5 also includes a connector portion 55 that is connected to the processing circuit 30 on the circuit board 3 via the connection portion 53. The connector portion 55 has a predetermined shape to be connected to a terminal connection portion (not shown) formed at the tip of the external wiring member 11, and is connected to the external controller 10 through the wiring member 11 by the connection.

  The casing 5 has a receiving portion 54 on one side of the cylindrical portion 52 in the longitudinal direction 5X and a connector portion 55 on the other side. That is, the housing 5 is formed in such a manner that the transformer 4, the sensor unit 2, and the connector unit 55 are arranged in this order in the longitudinal direction 5X. As a result, the housing 5 has the accommodating portion 54 on one side of the tubular portion 52 with the tubular portion 52 sandwiched around the tubular portion 52 fitted in the through-hole portion 9H (see FIG. 6) of the bumper 9. Therefore, the balance is good because the connector portion 55 is provided.

  The retainer 7 is a metal member such as stainless steel that plays a role of fixing to the bumper 9, and is engaged and fixed to the housing 5. That is, the housing 5 is fixed to the bumper 9 by the retainer 7. As shown in FIG. 2, the retainer 7 of the present embodiment includes a housing placement portion 70 for placing the cylindrical portion 52 of the housing 5, and fixing portions 57 of the housing 5 on both sides of the housing placement portion 70. And fixing portions 72 and 72 engaged and fixed to 57, and foot portions 71 and 71 fixed to the bumper 9 on both sides of the housing arrangement portion 70.

  The feet 71 and 71 of the retainer 7 have a long longitudinal shape in the longitudinal direction 5 </ b> X that is the arrangement direction of the sensor unit 2 and the transformer 4, as in the case 5. The legs 71, 71 of the opposing retainer 7 are also formed longer in the longitudinal direction 5X than the opposing direction 7X, and are fixed in close contact with the bumper 9 in the longitudinal direction 5X. In the present embodiment, the bumper 9 is fixed in close contact with an adhesive (double-sided tape) 71A attached to the feet 71, 71.

  In the present embodiment, fixing portions 57 and 57 of the housing 5 are formed on both sides of the cylindrical portion 52, and fixing portions 72 and 72 and a fitting receiving portion 75 to be described later are formed on both sides of the housing arrangement portion 70. 75 is formed, and feet 71 and 71 are formed at the front ends of the fitting receiving portions 75 and 75.

  In the present embodiment, the fixing portions 72 and 72 of the retainer 7 are engaged and fixed to the fixing portions 57 and 57 of the housing 5 at a position sandwiching the cylindrical portion 52 of the housing 5. The fixing portion 72 of the retainer 7 is an engagement piece having an engagement claw portion 72A at the tip that protrudes in a direction (in this case, a direction away from each other) toward or away from each other in the opposing direction 7X. The fixing portion 57 of the housing 5 is an engagement receiving portion 57 having an engagement concave portion 57A that receives the engagement claw portion 72A in the facing direction 7X. The engaging recess 57A has an inner wall surface 57a as an opposite wall surface facing the engaging claw portion 72A received inside toward the rear 2X1 (see FIG. 2), and the inner wall surface 57a and the engaging claw portion 72A. Is prevented from coming out to the rear 2X1 of the housing 5 with respect to the retainer 7.

  When assembling the retainer 7 to the housing 5, the cylindrical portion 52 of the housing 5 is moved forward 2X2 (see FIG. 2) and placed on the housing placement portion 70 of the retainer 7. At this time, the engagement receiving portion 57 of the housing 5 moves in such a manner that the engagement piece 72 of the retainer 7 is elastically deformed and pushed in the facing direction 7X, and the engagement claw portion 72A is engaged with the engagement recess. As it reaches 57A, the engagement piece 72 is elastically restored, and the engagement claw 72A enters the engagement recess 57A. As a result, the engaging claw 72A faces or abuts against the inner wall surface 57a of the engaging recess 57A, so that the retainer 7 is prevented from being pulled out rearward.

  Further, the retainer 7 includes a movement restricting portion 75 that restricts the movement of the casing 5 in the retaining state as described above in the longitudinal direction 5X and the facing direction 7X. When the retainer 7 is assembled to the housing 5, the movement restricting portion 75 of the present embodiment is a fitting receiving portion 75, 75 that receives the fitting portions 57, 57 formed on both sides of the facing direction 7 </ b> X of the housing 5. is there. The fitting parts 57 and 57 of this embodiment are the same as the fixing parts 57 and 57 already described. Further, the fitting receiving portions 75 and 75 of the present embodiment are the same as the already described engaging receiving portions 75 and 75, and both of the outer peripheral wall portions forming the rear end portion 51 of the housing 5 in the facing direction 7 </ b> X. On the outside, the fitting portions 57 and 57 are formed having wall portions 75C and 75C sandwiching from both outsides in the longitudinal direction 5X and a wall portion 75B facing outside in the facing direction 7X. However, the fitting receiving portions 75 and 75 enter the engaging recess 57A into the wall portions 75B that sandwich the casing 5 from the outside of the fitting portions 57 and 57 on both sides in the facing direction 7X. A cutout portion 75A is formed so that an operation for releasing the engaged state can be performed with respect to the engagement claw portion 72A.

  Further, in the present embodiment, the fitting receiving portions 75 and 75 have engagement pieces 72 and 72 inside the facing direction 7X, and the engagement pieces 72 and 72 are engaged with the housing 5 inside. The mating portions 57 and 57 are engaged. When the retainer 7 is assembled to the housing 5, the fitting receiving portions 75, 75 of the retainer 7 are fitted into the fitting receiving portions 75, 75 of the retainer 7, thereby fitting the fitting receiving portions 75, 75. The engaging pieces 72, 72 of the retainer 7 engage with the engaging receiving portions 57, 57 of the housing 5. That is, the fitting receiving portions 75 and 75 function as a guide when the engaging pieces 72 and 72 of the retainer 7 are engaged with the engaging receiving portions 57 and 57 of the housing 5.

  The retainer 7 has a connecting portion 76 that extends from the front end side of the wall portion that forms the fitting receiving portions 75 and 75 and connects to the foot portions 71 and 71. The connecting portions 76 are formed on both sides of the fitting receiving portion 75 in the longitudinal direction 5X so as to extend outward and forward in the facing direction 7X.

  The casing 5 of the present embodiment has a longitudinal shape centered on the cylindrical portion 52 and is attached to the bumper 9 in such a manner that the cylindrical portion 52 is fitted into the through-hole portion 9H. The connector portion 55 faces the bumper 9 with a gap 9A (see FIG. 8) interposed therebetween. For this reason, when a force is applied to the casing 5 from the outside, a force is applied to swing the both end sides in the longitudinal direction 5X around the cylindrical portion 52. And the case 5 is not touched and impact is not applied. In addition, since the fixing portions 72 and 72 of the retainer 7 are arranged with the cylindrical portion 52 located in the center of the housing 5 (between the accommodating portion 54 and the connector portion 55), the above-described force is balanced. I can support it. In addition, the legs 71 and 71 of the retainer 7 can be effectively supported by the bumper 9 being fixed in close contact with the bumper 9 in the longitudinal direction 5X. In addition, since the connector portion 55 is relatively separated from the bumper 9 in the housing 5, the housing 5 is likely to swing away and approach the bumper 9 on the connector portion 55 side, but excessive swinging is prevented. Therefore, a protrusion 59 (see FIGS. 5 and 6) that abuts against the bumper 9 when the swinging width exceeds a predetermined value is formed.

  As described above, according to the present embodiment, the thickness of the ultrasonic sensor device 1 mounted on the bumper 9 (the length in the direction 2X perpendicular to the surface of the bumper 9) is reduced as compared with the conventional case, resulting in a thin shape. . The thin shape greatly reduces the possibility of interference with the structure inside the bumper, and increases the degree of freedom of arrangement in the bumper 9 (on the vehicle side with respect to the bumper 9).

  In the ultrasonic sensor device 1 and the obstacle detection device 100 according to the present invention, the front side of the bumper 9 (the vehicle outer side) is the front and the rear side of the bumper 9 (the vehicle body side) is the rear when attached to the bumper 9. However, it is not always necessary that the front of this case coincide with the front of the vehicle (the forward direction of the vehicle). In other words, the bumper 9 to which the ultrasonic sensor device 1 is attached may be a side or rear bumper. Even in these cases, the front side (the vehicle outer side) of the bumper 9 is the front, and the rear side of the bumper 9 (the vehicle body) The side) is defined as the back, and the present invention can be similarly applied. In this embodiment, the bumper 9 of the vehicle is a stationary member and the ultrasonic sensor device 1 is attached, but the stationary member may be another garnish or a panel member.

  Although one embodiment of the present invention has been described above, this is merely an example, and the present invention is not limited to this, and the knowledge of those skilled in the art can be used without departing from the spirit of the claims. Various modifications such as addition and omission can be made based on this.

1 Ultrasonic sensor device 10 Controller (control unit)
DESCRIPTION OF SYMBOLS 100 Obstacle detection apparatus 2 Sensor part 3 Circuit board 4 Transformer 5 Case 5X Longitudinal direction 52 Cylindrical part 54 Accommodation part 54A Bottom part (bottom of accommodation part)
55 Connector 7 Retainer 9 Bumper

Claims (6)

A sensor unit that transmits and / or receives ultrasonic waves from the tip surface, a circuit board connected to the sensor unit, a transformer that forms an electronic component mounted on the circuit board, and the tip surface externally A housing that accommodates the sensor unit, the circuit board, and the transformer in a form that is exposed to , and a retainer that fixes the housing to a stationary member ,
The transformer is not adjacent to the orthogonal direction orthogonal to the tip surface of the sensor unit, and is arranged adjacent to the outside of the outer periphery of the tip surface ,
The housing is connected to a housing portion for housing the transformer, a cylindrical portion in which the sensor portion is disposed, and a terminal portion having a predetermined shape at the tip of the wiring member, and the wiring member and the circuit board are connected to each other. It has a connector part to be connected, in a form arranged in a straight line in this order, and has a longitudinal shape whose longitudinal direction is the arrangement direction,
The retainer includes a housing placement portion for placing the tubular portion, and both sides sandwiching the housing placement portion in a direction perpendicular to both the orthogonal direction and the longitudinal direction from the housing placement portion side. A connecting portion that extends, and a foot portion that is connected to the connecting portion and extends from the connecting position to both sides in the longitudinal direction, and is fixed in close contact with the stationary member,
The ultrasonic sensor device, wherein the housing portion and the connector portion are formed so as to face the stationary member fixed in close contact with the foot portion with a gap therebetween . A sensor unit that transmits and / or receives ultrasonic waves from the tip surface, a circuit board connected to the sensor unit, a transformer that forms an electronic component mounted on the circuit board, and the tip surface externally A housing that houses the sensor unit, the circuit board, and the transformer in a form exposed to
The transformer is not adjacent to the orthogonal direction orthogonal to the tip surface of the sensor unit, and is arranged adjacent to the outside of the outer periphery of the tip surface ,
The housing is connected to a housing portion for housing the transformer, a cylindrical portion in which the sensor portion is disposed, and a terminal portion having a predetermined shape at the tip of the wiring member, and the wiring member and the circuit board are connected to each other. An ultrasonic sensor device comprising: connector portions to be connected, arranged in a straight line in this order, and having a longitudinal shape in which the arrangement direction is a longitudinal direction . Connected to the terminal portion forming a predetermined shape of the front end of the wiring member, a connector portion for connecting the circuit board and the wiring member, according to claim 2 including the opposite side to the transformer with respect to the sensor unit Ultrasonic sensor device. A retainer for fixing the housing to a stationary member;
The housing has a longitudinal shape in which the sensor unit and the transformer are arranged in the longitudinal direction,
The retainer claims wherein at both sides of the housing longitudinally oppositely formed so as to extend both facing is fixed in close contact to longer the stationary member in the longitudinal direction than the opposite direction to each other Item 5. The ultrasonic sensor device according to Item 2 or Item 3 .   The housing includes a cylindrical portion in which the sensor portion is inserted and exposed at the front end side so that the front end surface is exposed to the outside, and a bottomed portion that accommodates the transformer on the front end side without being exposed to the outside. 5. A rear end portion that communicates on the rear end side with the tubular portion and the accommodating portion, and has a rear end portion that accommodates the circuit board. The ultrasonic sensor device according to claim 1.   The circuit board faces the sensor part on the opposite side of the tip surface and is arranged in a shape extending to the transformer side, and the transformer is a main surface facing the sensor part in the circuit board. The ultrasonic sensor device according to claim 1, wherein the ultrasonic sensor device is mounted on the ultrasonic sensor device.

Images