JPH0445347Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a horn device for an ultrasonic transmitter/receiver used for making an autonomous unmanned vehicle avoid obstacles.

[Prior Art] Conventionally, an ultrasonic transmitter/receiver has been attached to an autonomous unmanned vehicle to prevent the autonomous unmanned vehicle from colliding with obstacles when the autonomous unmanned vehicle runs. In this case, various types of horn devices are attached to the ultrasonic transceiver depending on its characteristics and required directivity.

By the way, normally, as shown in FIG. 4, an ultrasonic transmitter 1 and an ultrasonic receiver 2 are provided, and each of the ultrasonic transmitter 1 and the ultrasonic receiver 2 has a dedicated horns 3 and 4 are attached, and these horn-equipped transmitter 1 and receiver 2 are connected using a stay 5 made of plastic or metal.

In addition, the ultrasonic transmitter 1 and the ultrasonic receiver 2 are connected to the hole portions 3a of the horns 3 and 4, as shown in FIG.
4a.

In such a configuration, the ultrasonic transmitter 1
The ultrasonic waves emitted from the horn 3 are reflected on the surface of the object A, pass through the horn 4, and are received by the ultrasonic receiver 2. From this time, the ultrasonic waves from the object A
The distance is now being measured.

[Problems to be solved by the invention] However, in such a conventional device, in addition to the ultrasonic transmitter 1 and the ultrasonic receiver 2, horns 3 and 4 and a stay 5 are required. The problem is that the number of points inevitably increases.

Therefore, as shown in FIG. 7, a block material 6 was made from a suitable material without carefully examining the material, and an ultrasonic transmitter 1 and an ultrasonic receiver 2 were placed inside it.
It is also possible to mold the horn parts 7 and 8 at the same time and integrate the whole unit, but in this way, it is possible to integrate the whole unit by using the block material 6 of an appropriate material without carefully examining the material. Then,
There is a problem in that leakage noise that directly propagates through the block material 6 occurs between the ultrasonic transmitter 1 and the ultrasonic receiver 2, resulting in a poor S/N ratio.

The present invention aims to solve these problems and has developed a horn device for an ultrasonic transmitter/receiver that can be integrated as a whole by using a material with less leakage noise as the block material. The purpose is to provide.

[Means for Solving the Problems] Therefore, the horn device for an ultrasonic transmitter/receiver of the present invention uses foamed resin as the block material, and has holes for ultrasonic transmission in the foamed resin block material. The ultrasonic receiving holes are formed so as to be lined up with each other, and the ultrasonic transmitting hole is formed with a transmitter insertion hole for inserting and setting an ultrasonic transmitter, and a transmitter insertion hole for inserting and setting the ultrasonic transmitter. The transmitting horn hole communicates with the ultrasonic receiving hole, and the ultrasonic receiving hole includes a receiver insertion hole for inserting and setting an ultrasonic receiver, and a receiver insertion hole for inserting and setting the ultrasonic receiver. It consists of a hole for a reception horn that communicates with a hole for insertion.

[Function] In the horn device for an ultrasonic transceiver of the present invention described above, the ultrasonic transmitter is inserted into the transmitter insertion hole in the ultrasonic transmission hole, and the ultrasonic transmitter is inserted into the ultrasonic reception hole. The ultrasonic receiver is inserted into the receiver insertion hole and set, but when the transmitter emits ultrasonic waves,
After the ultrasonic waves are emitted through the transmitting horn hole, they are reflected on the surface of a desired object and are received by the receiver through the receiving horn hole.

[Embodiments of the Invention] The present invention will be specifically described below with reference to illustrated embodiments. FIG. 1 is a perspective view showing a horn device for an ultrasonic transceiver as an embodiment of the present invention. As shown in FIG.
A block material 11 made of foamed resin (urethane foam) is
The ultrasonic transmission hole 12 and the ultrasonic reception hole 13 are formed side by side with each other.

The ultrasonic transmission hole 11 includes a transmitter insertion hole portion 12A for inserting and setting the ultrasonic transmitter 1, and a transmitter insertion hole portion 12A for inserting and setting the ultrasonic transmitter 1 into the transmitter insertion hole portion 12A. The ultrasonic transmitter 1 is configured with a transmitting horn hole portion 12B that communicates with the ultrasonic transmitter 1 so that its transmitting surface is exposed in this state. a receiver insertion hole portion 13A for setting the receiver;
A receiving horn hole portion 13B communicates with the ultrasonic receiver 2 so that the receiving surface of the ultrasonic receiver 2 is exposed when the ultrasonic receiver 2 is set in the receiver insertion hole portion 13A.
It is made up of.

In addition, the inner wall surfaces 12B-1 and 13B of the transmitting horn hole portion 12B and the receiving horn hole portion 13B
As shown in FIG. 2, -1 has been subjected to surface hardening treatment compared to the internal foamed resin portion 11A. Therefore, the ultrasonic waves from the ultrasonic transmitter 1 hit the inner wall surface 12B-1 of the transmission horn hole portion 12B, and the ultrasonic waves strike the inner wall surface 12B-1 as shown in FIG.
Even if it passes through B-1, it will be absorbed by the bubbles of the internal foamed resin part 11A. As a result, the ultrasonic waves are not transmitted to the reception horn hole portion 13B side, that is, to the ultrasonic receiver 2 side, so that leakage noise can be greatly reduced.

With the above-described configuration, in order to incorporate the ultrasonic transmitter 1 and the ultrasonic receiver 2 into this horn device, the transmitter insertion hole portion 12A of the ultrasonic transmission hole 12 of the foamed resin block material 11 is inserted. The ultrasonic transmitter 1 is inserted and set, and the ultrasonic receiver 2 is inserted and set into the receiver insertion hole 13A of the ultrasonic reception hole 13.

Transmitter 1 was assembled in this way.
When an ultrasonic wave is emitted from the transmitting horn hole 12B, the ultrasonic wave is reflected from the surface of the desired object and passes through the receiving horn hole 13B.
The signal is received by the receiver 2 through the .

At this time, the ultrasonic waves leaking from the transmitting horn hole 12B to the receiving horn hole 13B are absorbed by the bubbles of the foamed resin part 11A in the foamed resin block material 11, so the leakage noise is very small. This greatly improves the S/N ratio on the receiving side.

Of course, since the ultrasonic transmitter 1 and the ultrasonic receiver 2 can be integrated, the whole can be made compact, and the number of parts can be reduced.

[Effects of the Invention] As detailed above, according to the horn device for an ultrasonic transceiver of the present invention, the following effects or advantages can be obtained.

(1) Since the ultrasonic transmitter and ultrasonic receiver can be integrated, the entire device can be made compact and the number of parts can be reduced.

(2) Even if the ultrasonic transmitter and ultrasonic receiver are integrated as a whole, since foamed resin is used for the block material, leakage noise can be extremely reduced, resulting in a high S/N ratio. The ratio can be significantly improved.

[Brief explanation of the drawing]

1 to 3 show a horn device for an ultrasonic transmitter/receiver as an embodiment of the present invention, FIG. 1 is a perspective view thereof, FIG. 2 is a partial sectional view of the horn hole, and FIG. The figure is a partial cross-sectional view for explaining its function, and Figures 4 to 6 show a conventional horn-equipped ultrasonic transceiver. Figure 4 is its overall configuration, and Figure 5 is its ultrasonic transceiver. An exploded perspective view of a sonic transmitter or an ultrasonic receiver and a horn, FIG. 6 is a schematic diagram for explaining its function, and FIG. 7 is a diagram showing the function of a conventional ultrasonic transmitter/receiver integrated device. FIG. 2 is a schematic diagram for explaining. 1... Ultrasonic transmitter, 2... Ultrasonic receiver, 11... Foamed resin block material, 11A...
Foamed resin part, 12...Ultrasonic transmission hole part, 12A
... Hole for transmitter insertion, 12B... Hole for transmitting horn, 12B-1... Inner wall surface of hole for transmitting horn, 13... Hole for ultrasonic reception, 13A...
Receiver insertion hole portion, 13B... Receiving horn hole portion, 13B-1... Inner wall surface of ultrasonic reception hole. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] An ultrasonic transmitting hole and an ultrasonic receiving hole are formed side by side in a foamed resin block material, and the ultrasonic transmitting hole is used for inserting and setting an ultrasonic transmitter. It consists of a transmitter insertion hole and a transmission horn hole that communicates with the transmitter insertion hole, and the ultrasonic reception hole allows the ultrasonic receiver to be inserted and set. 1. A horn device for an ultrasonic transmitter/receiver, comprising: a receiver insertion hole portion for transmitting a receiver; and a reception horn hole portion communicating with the receiver insertion hole portion.