Detection device and machine tool

Abstract

To provide a detector and a work machine that can prevent a wrong detection of a target.SOLUTION: The detector of the present disclosure includes: a radar attached to an upper rotary body of a work machine with a lower travel body which supports a blade and the upper rotary body rotatably, the radar detecting an object around the upper rotary body by using an electric wave; and a cover for covering the lower part and the side part of a transmission-reception surface for electric waves of the radar by a predetermined depth, the cover suppressing transmission of electric waves.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a detection device and a work machine.

Background Art

[0002] Patent Document 1 describes a configuration example of an obstacle sensor that detects obstacles existing around a superstructure. The obstacle sensor described in Patent Document 1 is configured using, for example, a millimeter-wave radar, and detects the distance to an obstacle existing around the superstructure.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, as a result of the applicant's study, in the detection of a detection target object (hereinafter referred to as an object) using a millimeter-wave radar, depending on the turning position of the superstructure and the installation method of the millimeter-wave radar, for example, false detection of the object may occur due to millimeter waves reflected by a blade (referred to as an "earth discharge plate" in Patent Document 1) that is not an object.

[0005] The present disclosure has been made in consideration of the above circumstances, and an object thereof is to provide a detection device and a work machine that can prevent false detection of an object.

Means for Solving the Problems

[0006] One aspect of the present disclosure is attached to the upper revolving body of a working machine having a lower traveling body that swingably supports a blade and rotatably supports an upper revolving body, and uses radio waves to detect an object located around the upper revolving body. A radar, and a cover that covers the lower and side of the radio wave transmission / reception surface of the radar with a predetermined depth and suppresses the transmission of radio waves.

Effects of the Invention

[0007] According to the detection device and the working machine of the present disclosure, false detection of an object can be prevented.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each figure, the same or corresponding components are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. FIG. 1 is a perspective view showing a configuration example of a working machine according to the present disclosure. FIG. 2 is a perspective view showing an enlarged view of the detection device shown in FIG. 1. FIG. 3 is a side view of the detection device shown in FIG. 2. FIGS. 4 and 5 are perspective views showing a schematic configuration of the cover shown in FIGS. 1 and 2. FIG. 6 is a perspective view showing an attachment example of the cover according to the present disclosure.

[0010] FIG. 1 shows a configuration example of a working machine 100 according to an embodiment of the present disclosure. FIG. 2 shows an enlarged view of the detection device 200 shown in FIG. 1. The working machine 100 operates at a construction site and constructs a construction target such as earth and sand. The working machine 100 according to the embodiment of the present disclosure is, as an example, a hydraulic excavator (small excavator, mini excavator). The working machine 100 includes a lower traveling body 110, an upper swing body 120, a working device 130, and a blade 150. The upper swing body 120 supports the working device 130 so as to be swingable, and mounts a cab 140 and a detection device 200.

[0011] In the working machine 100, the lower traveling body 110 supports the working machine 100 so as to be travelable. The lower traveling body 110 includes, for example, a pair of left and right crawlers. The lower traveling body 110 supports the upper swing body 120 so as to be swingable. The lower traveling body 110 supports the blade 150 so as to be swingable in the vertical direction as shown by solid lines and chain lines.

[0012] As shown in FIG. 2, the detection device 200 includes a millimeter-wave radar 210 and a cover 220. Inside the millimeter-wave radar 210, a millimeter-wave radar body (not shown) is housed. In FIGS. 2 to 6, the detection device 200 will be described with reference to the front-rear, left-right, and up-down directions based on the transmission / reception surface 210a of the millimeter wave (radio wave in the 30 GHz band to 300 GHz band) transmitted and received by the millimeter-wave radar 210. In this case, the transmission / reception surface 210a is the outer surface of the housing of the millimeter-wave radar 210 in the direction in which the millimeter-wave radar 210 transmits and receives millimeter waves. The outer surface of the housing of the millimeter-wave radar is made of resin or the like in consideration of environmental resistance and is designed so as to have little influence on the radar performance.

[0013] The millimeter-wave radar 210 is attached to the upper slewing body 120 and detects an object located around the upper slewing body 120 using millimeter waves. The millimeter-wave radar 210 detects, for example, the distance, angle, and speed to one or more objects located within the detection range 200d shown in FIG. 1, and outputs the detected results, or the fact that no object has been detected, as a detection result to a control device (not shown) provided in the working machine 100. The object is, for example, a person or an object other than a person having a predetermined size (obstacle).

[0014] As shown in FIG. 2, the cover 220 covers the lower side (downward) and the side (left and right directions) of the millimeter-wave transmission and reception surface 210a of the millimeter-wave radar 210 with a predetermined depth (length in the front-rear direction), and suppresses the transmission of millimeter waves from the outside of the cover 220 toward the transmission and reception surface 210a. As shown in FIGS. 2, 4, 5, etc., in the present embodiment, the cover 220 includes a front surface portion 221, a right side surface portion 222, a left side surface portion 223, and an inclined portion 224. The cover 220 can be configured using a material that easily reflects radio waves, such as metal. Alternatively, the cover 220 may be configured using, for example, a radio wave absorber. The predetermined depth preferably has a size with a predetermined distance in both the front and rear directions sandwiching the transmission and reception surface 210a of the millimeter-wave radar 210. The predetermined depth of the cover 220 is preferably larger than the depth of the millimeter-wave radar 210 (the length in the front-rear direction of the millimeter-wave radar 210 main body) and extends rearward beyond the rear surface 210b of the millimeter-wave radar 210, as shown in FIG. 3, for example, but is not limited thereto.

[0015] Also, as shown in FIG. 3, the cover 220 is preferably installed so as to cover the lower side of the range 210b corresponding to the vertical beam width BW of the millimeter-wave radar. The vertical beam width BW is, for example, the 3 dB beam width. Note that the range 210b may be a range corresponding to the vertical beam width BW, or may be a range defined as a metal prohibition range that prohibits the presence of metal as a specification depending on the product of the millimeter-wave radar.

[0016] Further, as shown in FIG. 5, the cover 220 has an inclined portion 224 and an opening 225 on the lower surface 220BS. By having the inclined portion 224 and the opening 225, it is possible to prevent water and soil from accumulating inside the cover 220.

[0017] Regarding the attachment of the cover 220, for example, as shown in FIG. 6, a bracket 227 having a long hole 226 provided in the cover 220 can be attached to a bracket 231 for fixing the millimeter-wave radar 210 using bolts 232 or the like so that the positional relationship (in the height direction) can be adjusted.

[0018] As described above, the detection device 200 of the present embodiment is attached to the upper swing body 120 of the working machine 100 having the lower traveling body 110 that swingably supports the blade 150 and swingably supports the upper swing body 120, and uses millimeter waves to detect an object located around the upper swing body 120. And a cover 220 that covers the lower and side portions of the millimeter-wave transmission / reception surface 210a of the millimeter-wave radar 210 with a predetermined depth and suppresses the transmission of millimeter waves. According to this configuration, since the reflected waves from the lower front and lower side can be shielded, for example, the millimeter waves reflected by a blade or the like that is not an object can be shielded, and false detection of the object due to the millimeter waves reflected by a blade or the like that is not an object can be prevented.

[0019] As described above, the embodiments of the present invention have been described with reference to the drawings. However, the specific configuration is not limited to the above embodiments, and design changes and the like within the scope not departing from the gist of the present invention are also included. For example, in the above, the case where the radar included in the detection device is a millimeter-wave radar is shown. However, the detection device of the present disclosure may use a radar that uses radio waves other than millimeter waves. For example, a quasi-millimeter-wave radar using quasi-millimeter waves (radio waves in the 24 GHz band) may be used. Further, the shape of the cover is not limited to the above shape, and may be, for example, a hemispherical shape.

Description of Reference Numerals

[0020] 100 Work machine, 110 Lower traveling body, 120 Upper slewing body, 150 Blade, 200 Detection device, 210 Millimeter-wave radar, 220 Cover

Claims

1. A radar attached to the upper revolving body of a working machine having a lower traveling body that swingably supports a blade and rotatably supports the upper revolving body, and detects an object located around the upper revolving body using radio waves; A cover that covers the lower and side portions of the radio wave transmission / reception surface of the radar with a predetermined depth and suppresses radio wave transmission; Comprising: The cover has an inclined portion and an opening on its lower surface; The inclined portion has a surface that inclines downward as it goes from the front side to the rear side of the transmission / reception surface; The opening is provided in contact with the lowermost end of the inclined portion; A detection device.

2. The cover covers the lower part of the range corresponding to the vertical beam width of the radar; The detection device according to Claim 1.

3. A blade; An upper revolving body; A lower traveling body that swingably supports the blade and rotatably supports the upper revolving body; A radar attached to the upper revolving body and detecting an object located around the upper revolving body using radio waves; A cover that covers the lower and side portions of the radio wave transmission / reception surface of the radar with a predetermined depth and suppresses radio wave transmission; Comprising: The cover has an inclined portion and an opening on its lower surface; The inclined portion has a surface that inclines downward as it goes from the front side to the rear side of the transmission / reception surface; The opening is provided in contact with the lowermost end of the inclined portion; A working machine.

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