TW202009514A - Ultrasonic transducer apparatus - Google Patents

Abstract

An ultrasonic transducer apparatus comprises a first casing, a second casing, and an ultrasonic transducer. The first casing has a first through hole. The first through hole includes first and second openings. The second casing has a second through hole. The second through hole includes third and fourth openings. The ultrasonic transducer includes a transmitting unit and a receiving unit. The transmitting unit is coupled with the first opening. The receiving unit is coupled with the third opening. At least one of the second and fourth openings is elongated-shaped.

Description

Ultrasonic sensor device

This case is about an ultrasonic sensor.

The ultrasonic sensor includes a transmitting end and a receiving end, which first emits ultrasonic waves outward from the transmitting end, reflects the ultrasonic waves through an external object, and then collects the reflected ultrasonic waves by the receiving end and converts them into signals for subsequent actions.

However, the transmitted supersonic wave often interferes with the reflected supersonic wave (crosstalk), and the closer the distance between the transmitting end and the receiving end, the easier it is that the ultrasonic wave is directly transmitted from the transmitting end to the receiving end.

In addition, when the conventional ultrasonic sensor is used to detect obstacles in front, the ultrasonic wave emitted by the transmitting end is easily reflected by the short objects on the ground, so the receiving end easily detects the short objects on the ground. In addition, because the wavelength of the supersonic wave reflected by the short object is easily different from the wavelength of the supersonic wave emitted from the transmitting end, the phenomenon of offsetting the above-mentioned two occurs and a detection blind spot occurs, thereby reducing the efficiency of ultrasonic detection.

This case provides an ultrasonic sensor device including a first shell portion, a second shell portion and an ultrasonic sensor. The first shell portion has a first perforation. The first through hole includes a first opening and a second opening. The second shell portion has a second perforation. The second through hole includes a third opening and a fourth opening. The ultrasonic sensor includes a transmitting unit and a receiving unit. The transmitting unit is coupled to the first opening. The receiving unit is coupled to the third opening. At least one of the second opening and the fourth opening is elongated.

In the ultrasonic sensor device of this case, by separating the transmitting unit and the receiving unit of the ultrasonic sensor with the first shell portion and the second shell portion having a special structure, the problem that ultrasonic waves are directly transmitted from the transmitting unit to the receiving unit can be greatly reduced . In addition, the second opening is elongated and its opening area is smaller than the opening area of the first opening, so that the ultrasonic wave exiting from the second opening produces a diffraction phenomenon. The transmission range of the ultrasonic wave along the long axis direction of the second opening is concentrated and along The transmission range of the ultrasonic wave in the short axis direction of the second opening is expanded, which can reduce the detection of short objects on the ground and increase the spread of the ultrasonic wave in the horizontal direction in the application of detecting obstacles in front.

The above is only used to explain the problem to be solved in this case, the technical means to solve the problem, and the resulting effects, etc. The specific details of this case will be introduced in detail in the following embodiments and related drawings.

θ1, θ2‧‧‧Angle

A1, A2‧‧‧Axis

N1‧‧‧Normal direction

S1, S2‧‧‧plane

WA1, WA2‧‧‧Scope

2-2, 3-3, 4-4, 5-5, 6-6

100, 200, 300, 400 ‧‧‧ Ultrasonic sensor device

120, 220, 320, 420

122, 222, 322, 422

124, 224, 324, 424

126, 226, 326, 426‧‧‧Second opening

130, 230, 330, 430 ‧‧‧ second shell

132, 232, 332, 432

134, 234, 334, 434‧‧‧ third opening

136, 236, 336, 436 ‧‧‧ fourth opening

140, 240, 340, 440‧‧‧ Ultrasonic sensor

142, 242, 342, 442‧‧‧ Launch unit

144, 244, 344, 444

150, 250‧‧‧First long axis

160, 260‧‧‧second long axis

170‧‧‧The third long axis

428‧‧‧Base

In order to make the above and other objects, features, advantages and embodiments of the case more obvious and understandable, the drawings are described as follows:

FIG. 1 is a perspective view showing an ultrasonic sensor device according to an embodiment of the present case.

FIG. 2 is a cross-sectional view of the ultrasonic sensor device of FIG. 1 along line 2-2.

FIG. 3A is a schematic side view showing the ultrasonic transmission range of a conventional ultrasonic sensor.

FIG. 3B is a schematic side view showing the ultrasonic transmission range of the ultrasonic sensor device in this case.

FIG. 4 is a front view showing the ultrasonic sensor device in FIG. 1.

FIG. 5 is a schematic side view showing the first perforation according to an embodiment of the present case.

FIG. 6 is a schematic side view showing a second perforation according to an embodiment of the present case.

FIG. 7 is a perspective view showing an ultrasonic sensor device according to another embodiment of the present case.

FIG. 8 is a cross-sectional view along line 4-4 of the ultrasonic sensor device of the present case in FIG. 7.

FIG. 9 is a front view showing an ultrasonic sensor device according to still another embodiment of the present case.

FIG. 10 is a cross-sectional view along line 5-5 of the ultrasonic sensor device of the present case in FIG. 9.

FIG. 11 is a perspective view showing an ultrasonic sensor device according to one or more embodiments of the present case.

FIG. 12 is a cross-sectional view of the ultrasonic sensor device of FIG. 11 along line 6-6.

In the following, a plurality of embodiments of the case will be disclosed in a diagram. For the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the case. That is, in some implementations of this case, these practical details are unnecessary. In addition, in order to simplify the drawings, some conventional structures and elements will be shown in a simple schematic manner in the drawings.

Please refer to Figure 1 and Figure 2 together. FIG. 1 is a perspective view showing an ultrasonic sensor device 100 according to an embodiment of the present case. FIG. 2 is a cross-sectional view of the ultrasonic sensor device 100 in FIG. 1 along line 2-2. The ultrasonic sensor device 100 includes a first shell 120, a second shell 130 and an ultrasonic sensor 140. The first shell 120 has a first through hole 122. The first through hole 122 includes a first opening 124 and a second opening 126. The second shell 130 has a second hole 132. The second through hole 132 includes a third opening 134 and a fourth opening 136. The ultrasonic sensor 140 includes a transmitting unit 142 and a receiving unit 144. The firing unit 142 is coupled to the first opening 124. The receiving unit 144 is coupled to the third opening 134.

In an embodiment of the present case, the first shell 120 and the second shell 130 are directly connected to the ultrasonic sensor 140. Specifically, the transmitting unit 142 is directly embedded in the first shell 120 and coupled to the first opening 124, and the receiving unit 144 is also directly embedded in the second shell 130 and coupled to the third opening 134. By separating the transmitting unit 142 and the receiving unit 144 of the ultrasonic sensor 140 through the first housing 120 and the second housing 130, the problem that the ultrasound transmitted by the transmitting unit 142 is directly transmitted to the receiving unit 144 can be effectively avoided.

In some embodiments, the shape of the first opening 124 is circular, which conforms to the shape of the emitting end of the emitting unit 142, so that the ultrasonic wave can enter the first through hole 122 without obstruction. In one embodiment, the ultrasonic sensor device 100 can first concentrate the ultrasonic wave in the first perforation 122 through the first housing portion 120 and emit it outward from the second opening 126, thereby increasing the ultrasonic transmission distance. Specifically, as shown in FIGS. 1 and 2, the first through hole 122 is a Horn-shaped hole, and the opening area of the first opening 124 is larger than the opening area of the second opening 126. This structural configuration is beneficial for focusing the ultrasonic wave emitted by the transmitting unit 142 along the tapered first perforation 122 to concentrate its energy at the second opening 126, and further transmitting the ultrasonic wave further. However, the shape of the first perforation 122 in this case is not limited to this, for example, it may also be a tapered hole of other shapes.

The opening shape of the second opening 126 is designed as an elongated slot shape, and its vertical length is greater than the horizontal length. Since the frequency of the ultrasonic wave in this case is about 40 kilohertz (Hertz), this frequency is close to the frequency of the light wave. At this time, the sound wave has a slit diffraction characteristic similar to that of the light wave. Therefore, when the ultrasonic wave emitted by the transmitting unit 142 passes through the first perforation 122 to the second opening 126, a slit diffraction phenomenon will occur due to the shape of the second opening 126, further narrowing the vertical transmission range of the ultrasonic wave and horizontal The delivery range is widened.

Please refer to Figure 3A and Figure 3B together. FIG. 3A is a schematic side view showing the ultrasonic transmission range WA1 of the conventional ultrasonic sensor. FIG. 3B is a schematic side view showing the ultrasonic transmission range WA2 of the ultrasonic sensor device 100 in this case. As shown in Fig. 3A, the conventional ultrasonic sensor directly radiates ultrasonic waves from the transmitting end. As shown in FIG. 3B, which is a cross-sectional view of the ultrasonic sensor device 100 in FIG. 1 along line 3-3, the ultrasonic wave emitted by the transmitting unit 142 passes through the second opening 126 of the first housing 120 Shoot out. In this case, since the first shell 120 has a special structure, the transmission range WA2 is significantly more concentrated than the transmission range WA1, that is, narrowed in the vertical direction. Therefore, in the application of detecting obstacles in front, the transmitted ultrasonic waves will not be easily reflected by the short objects on the ground, thereby reducing the cancellation of the sound waves caused by the short objects and the range of the blind zone caused by the above ground effects.

Please refer to Figure 1 and Figure 2 again. As shown in the figure, the second through hole 132 is a Horn-shaped hole, and its tapering direction is opposite to that of the first through hole 122. That is, the opening area of the fourth opening 136 is larger than the opening area of the third opening 134. This structural configuration is beneficial for focusing the reflected ultrasonic wave along the tapered second perforation 132 to concentrate its energy in the third opening 134, thus enhancing the sound collection effect. However, the shape of the second perforation 132 in this case is not limited to this, for example, it may also be a tapered hole of other shapes.

Please refer to FIG. 4, which is a front view of the ultrasonic sensor device 100 shown in FIG. 1. As shown in FIG. 4, the second opening 126 has an elongated long slot shape, and has a first long axis 150. The third opening 134 is elliptical and has a third long axis 170. The fourth opening 136 is an ellipse with the largest area, and has a second long axis 160. Due to the above-mentioned ultrasonic diffraction characteristics, when the second long axis 160 of the elliptical fourth opening 136 is perpendicular to the ground, it will facilitate the sound collection in the horizontal direction. On the other hand, when the third long axis 170 of the oval-shaped third opening 134 is parallel to the ground, it will be beneficial to the sound collection in the second hole 132 in the vertical direction. Therefore, the ultrasonic sensor device 100 can be strengthened to receive the reflected ultrasonic waves in the horizontal direction, and then through the cooperation of the fourth opening 136 and the third opening 134 and the function of the tapered second perforation 132, the radio reception effect is maximized Jiahua.

Further, in one or more embodiments of the present case, the second long axis 160 may be parallel to the first long axis 150, so that the tilt direction of the transmitted ultrasonic wave can be matched with the tilt direction of the received ultrasonic wave to enhance the sound reception effect. On the other hand, the third long axis 170 can be perpendicular to the second long axis 160, so that the third opening 134 can match the geometric shape of the second through hole 132 that is long in the vertical direction and narrow in the horizontal direction, and is strengthened vertically in the second through hole 132 The direction of the radio, and then optimize the overall radio effect.

Please refer to FIG. 5, which is a schematic side view illustrating the first through hole 122 according to an embodiment of the present case. As shown in FIG. 5, the first opening 124 is parallel to a plane S1, and the angle θ1 between the axis A1 formed by the center of the first opening 124 and the center of the second opening 126 and the plane S1 is a right angle. In detail, through a virtual plane S1 and an axis A1 formed by the center of the first opening 124 and the center of the second opening 126, it can be known that the first perforation 122 is symmetrical in the vertical direction. Therefore, the ultrasonic wave can be emitted straight ahead through the first perforation 122. It should be noted that the angle θ1 between the axis A1 and the plane S1 in this case is not limited thereto. For example, the angle θ1 may also be a non-right angle. That is, the first perforation 122 may be arranged obliquely and asymmetrically in the vertical direction. Specifically, the inclination of the axis A1 relative to the plane S1 can be obtained from the included angle θ1. By adjusting the included angle θ1, ultrasonic waves can be emitted specifically for a specific direction. For example, it can emit upward 10 degrees, upward 20 degrees, downward 10 degrees, etc. However, the asymmetrical arrangement of the first perforation 122 in this case is not limited to this. For example, the first perforation 122 can also be asymmetrical in the horizontal direction in addition to being asymmetrical in the vertical direction, so the ultrasound can be more accurately targeted to a certain Launch in a specific direction.

Please refer to FIG. 6, which is a schematic side view illustrating the second through hole 132 according to an embodiment of the present case. As shown in FIG. 6, the third opening 134 is parallel to a plane S2, and the angle θ2 between the axis A2 formed by the center of the third opening 134 and the center of the fourth opening 136 and the plane S2 is not a right angle. Among them, the second perforation 132, the third opening 134, the fourth opening 136, the plane S2, the axis A2, and the included angle θ2 of this embodiment are the same as the implementation of the relative elements in FIG. 5, so please refer to the related description above to More clearly understand the setting of the second through hole 132. Specifically, through the foregoing arrangement, the second perforation 132 may be arranged in an inclined manner to specifically collect sound in a specific direction. As shown in Figure 6, it can pick up the sound slightly upward to avoid the supersonic waves reflected by small objects on the ground. It should be noted that the angle θ2 between the axis A2 and the plane S2 in this case is not limited thereto. For example, the angle θ2 may be a right angle. That is, the second perforation 132 may be arranged horizontally.

In addition, in one or more embodiments of the present case, the included angle θ2 may be equal to the included angle θ1. When the supersonic wave emitted in a specific direction is reflected, the detection effect can be improved by collecting sound in the same specific direction. Further, the ultrasonic sensor device 100 in this case can be arranged in a plurality of arrays, and by setting each ultrasonic sensor device 100 to face a specific direction, the overall detection effect is further enhanced.

Please refer to Figure 7 and Figure 8 together. FIG. 7 is a perspective view showing an ultrasonic sensor device 200 according to another embodiment of the present case. FIG. 8 is a cross-sectional view of the ultrasonic sensor device 200 in FIG. 7 along line 4-4. In FIGS. 7 and 8, the ultrasonic sensor device 200 includes a first shell 220, a second shell 230 and an ultrasonic sensor 240. The first shell 220 has a first hole 222. The first through hole 222 includes a first opening 224 and a second opening 226. The second shell 230 has a second through hole 232. The second through hole 232 includes a third opening 234 and a fourth opening 236. The ultrasonic sensor 240 includes a transmitting unit 242 and a receiving unit 244. The firing unit 242 is coupled to the first opening 224. The receiving unit 244 is coupled to the third opening 234. Among them, the second opening 226, the second perforation 232, the fourth opening 236, the ultrasonic sensor 240, the transmitting unit 242 and the receiving unit 244 of this embodiment correspond to the embodiments shown in FIGS. 1 to 6 respectively The components are the same, so please refer to the relevant descriptions above, which will not be repeated here.

It should be noted that, compared to the embodiment shown in FIGS. 1 to 6, the lengths of the first opening 224 and the second opening 226 in the vertical direction of this embodiment are equal to each other, and the first opening 224 is horizontal The length in the direction is greater than the length of the second opening 226 in the horizontal direction. In other words, the opening area of the first opening 224 is larger than the opening area of the second opening 226. Therefore, the first perforation 222 is also Horn-shaped, and also has the effect of the first perforation 122 as in the foregoing embodiment can help the ultrasonic energy concentration.

In addition, compared to the embodiment shown in FIGS. 1 to 6, the first shell portion 220 and the second shell portion 230 of this embodiment are stacked along a direction parallel to the first long axis 250, and The first shell 220 is disposed above the second shell 230. Specifically, as shown in FIGS. 7 and 8, the first shell 220 includes a first through hole 222, and the second opening 226 included in the first through hole 222 has a first long axis 250. The second shell 230 includes a second through hole 232, and the fourth opening 236 included in the second through hole 232 has a second long axis 260. When the first long axis 250 and the second long axis 260 are collinear, the first shell portion 220 and the second shell portion 230 are stacked along the same axis. With this structural configuration, the transmitting unit 242 and the receiving unit 244 can be further spaced apart so that the ultrasonic wave transmitted through the elongated second opening 226 is separated from the ultrasonic wave received through the elongated fourth opening 236, and Can further reduce the interference between the above two. However, the stacking method of the first shell 220 and the second shell 230 in this embodiment is not limited thereto. For example, in practical applications, the first long axis 250 and the second long axis 260 may also be designed not to be collinear. That is, the first shell portion 220 and the second shell portion 230 may be offset from or offset from each other in a direction perpendicular to the first long axis 250.

Please refer to Figure 9 and Figure 10 together. FIG. 9 is a front view showing an ultrasonic sensor device 300 according to still another embodiment of the present case. FIG. 10 is a cross-sectional view along line 5-5 of the ultrasonic sensor device 300 of the present case in FIG. 9. In FIGS. 9 and 10, the ultrasonic sensor device 300 includes a first housing 320, a second housing 330 and an ultrasonic sensor 340. The first shell 320 has a first through hole 322. The first through hole 322 includes a first opening 324 and a second opening 326. The second shell 330 has a second through hole 332. The second through hole 332 includes a third opening 334 and a fourth opening 336. The ultrasonic sensor 340 includes a transmitting unit 342 and a receiving unit 344. The firing unit 342 is coupled to the first opening 324. The receiving unit 344 is coupled to the third opening 334. Among them, the first opening 324, the second through hole 332, the fourth opening 336, the ultrasonic sensor 340, the transmitting unit 342 and the receiving unit 344 of this embodiment correspond to the embodiments shown in FIGS. 1 to 6 respectively The components are the same, so please refer to the relevant descriptions above, which will not be repeated here.

It should be noted that, compared with the embodiment shown in FIGS. 1 to 6, the second opening 326 of this embodiment has a narrow and elliptical shape. The third opening 334 is circular and conforms to the outer shape of the receiving unit 344. The opening areas of the first opening 324 and the third opening 334 are the same. The opening areas of the second opening 326 and the fourth opening 336 are the same, and the opening area of the second opening 326 is larger than the opening area of the first opening 324. Therefore, in this embodiment, the first through hole 322 and the second through hole 332 are both Horn-shaped and have the same tapering direction. With the above configuration, the length of the first perforation 322 and the second perforation 332 can be relatively shortened compared to the above-mentioned other embodiments of this case, so this embodiment can be applied to equipment that requires a smaller volume of ultrasonic sensing device in.

Please refer to FIGS. 1 to 10 of this case again. In one or more embodiments of this case, the first shell portion and the second shell portion are connected to each other to form an integrally formed single-piece structure. However, the arrangement of the first shell portion and the second shell portion in this case is not limited to this, for example, the first shell portion and the second shell portion can also be provided separately. Specifically, the transmitting unit coupled to the first housing portion and the receiving unit coupled to the second housing portion can be installed in different positions of other devices in a group, so that the transmission and reception of ultrasound meet the actual requirements.

Please refer to Figure 11 and Figure 12 together. FIG. 11 is a perspective view showing an ultrasonic sensor device 400 according to one or more embodiments of the present case. FIG. 12 is a cross-sectional view of the ultrasonic sensor device 400 of FIG. 11 along line 6-6. In FIGS. 11 and 12, the ultrasonic sensor device 400 includes a first shell 420, a second shell 430 and an ultrasonic sensor 440. The first shell 420 has a first through hole 422. The first through hole 422 includes a first opening 424 and a second opening 426. The second shell 430 has a second through hole 432. The second through hole 432 includes a third opening 434 and a fourth opening 436. The ultrasonic sensor 440 includes a transmitting unit 442 and a receiving unit 444. The firing unit 442 is coupled to the first opening 424. The receiving unit 444 is coupled to the third opening 434. Among them, the second through hole 432, the third opening 434, the fourth opening 436, the ultrasonic sensor 440, the transmitting unit 442 and the receiving unit 444 of this embodiment correspond to the embodiments shown in FIGS. 1 to 6 respectively The components are the same, so please refer to the relevant descriptions above, which will not be repeated here.

It should be noted that, compared to the embodiment shown in FIGS. 1 to 6, the lengths of the first opening 424 and the second opening 426 in the vertical direction of the present embodiment are equal to each other, and the first opening 424 is horizontal The length in the direction is greater than the length of the second opening 426 in the horizontal direction. In other words, the opening area of the first opening 424 is larger than the opening area of the second opening 426. Therefore, the first through-hole 422 is also Horn-shaped, and has the same effect as the first through-hole 122 in the foregoing embodiment to help the ultrasonic energy concentration.

In addition, the second opening 426 is tapered and inclined. Specifically, the opening area of the second opening 426 is smaller than the cross-sectional area of any vertical direction of the first through hole 422, and the tapered configuration of the second opening 426 is achieved and helps to pass the trumpet-shaped first through hole 422 The supersonic wave carries out the energy concentration again. On the other hand, the opening plane of the second opening 426 is not parallel to the opening plane of the first opening 424 and its normal direction N1 is away from the second through hole 432. Therefore, the supersonic wave emitted outward through the second opening 426 can be transmitted upward slightly to reduce the chance of it being reflected by the short objects on the ground, thereby reducing the cancellation of the sound waves caused by the short objects and reducing the blind area caused by the above ground effect range.

On the other hand, compared to the above-described embodiments shown in FIGS. 1 to 10, the first shell portion 420 and the second shell portion 430 of this embodiment are two independent components and are connected to each other by the base 428. That is to say, the first shell portion 420 and the second shell portion 430 are not a one-piece structure integrally formed. Specifically, the first shell 420 further includes a base 428. The second shell portion 430 is embedded on the base 428 so that the first shell portion 420 and the second shell portion 430 only contact each other on the base 428. However, the connection method of the first shell portion 420 and the second shell portion 430 in this case is not limited thereto. For example, the second shell portion 430 may also be bonded to the first shell portion 420 by an adhesive.

From the above detailed description of the specific implementation of the case, it can be clearly seen that by separating the transmitting unit and the receiving unit of the ultrasonic sensor with the first shell part and the second shell part having a special structure, the ultrasonic wave can be directly The problem of transmitting unit to receiving unit. In addition, the second opening is elongated and the opening area of the opening is smaller than the opening area of the first opening, which can cause the ultrasonic wave exiting from the second opening to produce a diffraction phenomenon, which will be along the long axis direction of the second opening The transmission range of ultrasound is concentrated and the transmission range of ultrasound along the short axis of the second opening is expanded, which can reduce the detection of short objects on the ground and increase ultrasound in the application of detecting obstacles in front of Horizontal diffusion.

Although the case has been disclosed as above, but it is not used to limit the case, but any person who is familiar with this skill can make various changes and modifications within the spirit and scope of the case, so the scope of protection of the case should be combined The scope of the attached patent application shall prevail.

2-2, 3-3‧‧‧ line

100‧‧‧Ultrasonic sensing device

120‧‧‧The first shell

122‧‧‧First punch

130‧‧‧The second shell

132‧‧‧Second Perforation

140‧‧‧Ultrasonic sensor

Claims (10)

An ultrasonic sensor device includes: a first shell portion having a first perforation, the first perforation having a first opening and a second opening; a second shell portion having a second perforation, the first The two perforations have a third opening and a fourth opening; and an ultrasonic sensor coupled to the first shell portion and the second shell portion, and includes: a transmitting unit coupled to the first opening; and a receiving The unit is coupled to the third opening, wherein at least one of the second opening and the fourth opening has an elongated shape. The ultrasonic sensor device according to claim 1, wherein the second opening is elongated and has a first long axis, and the opening area of the second opening is smaller than the opening area of the first opening. The ultrasonic sensor device according to claim 2, wherein the first shell portion and the second shell portion are stacked along a direction parallel to the first long axis. The ultrasonic sensor device according to claim 1, wherein the opening area of the fourth opening is larger than the opening area of the third opening. The ultrasonic sensor device according to claim 4, wherein the second opening is elongated and has a first long axis. The ultrasonic sensor device according to claim 5, wherein the fourth opening is elongated and has a second long axis, and the second long axis is parallel to the first long axis. The ultrasonic sensor device according to claim 6, wherein the third opening is elongated and has a third long axis, and the third long axis is perpendicular to the second long axis. The ultrasonic sensor device according to claim 1, wherein the first opening is parallel to a plane, and an axis connecting the center of the first opening and a center of the second opening is connected to the plane One of the included angles is non-right angle. The ultrasonic sensor device according to claim 1, wherein the third opening is parallel to a plane, and an axis connecting the center of the third opening and a center of the fourth opening is connected to the plane One of the included angles is non-right angle. The ultrasonic sensor device according to claim 9, wherein the included angle is equal to one between an axis formed by connecting a center of the first opening and a center of the second opening and the plane Angle.

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