JP6930449B2 - Interference suppression device - Google Patents

Description

The present invention relates to an interference suppression device that suppresses interference between an adjacent object adjacent to a work object and a work machine.

Patent Document 1 discloses an alarm system including an alarm device carried by an operator and a mechanical alarm device arranged on a work machine. The mechanical alarm device transmits a specific code for measuring the reception strength, and the alarm device compares the reference value with the reception strength of the received specific code. Then, when the reception intensity is larger than the reference value, it is determined that the user is inside the set range and an alarm is issued.

Japanese Unexamined Patent Publication No. 2005-346228

However, in Patent Document 1, since the reference value is constant, only the correspondence corresponding to this reference value can be taken. On the other hand, in actual work, there is a demand that the correspondence be different as the distance between the adjacent object adjacent to the work object and the work machine is gradually reduced. For example, when the distance between the work machine and the adjacent object is sufficient, the moving speed of the tip attachment is reduced, and when the distance between the work machine and the adjacent object is further reduced, the movement of the tip attachment is stopped. There is a desire to handle multiple types.

An object of the present invention is to provide an interference suppression device capable of performing a plurality of types of correspondence.

The present invention is an interference suppression device that suppresses interference between an adjacent object adjacent to a work object and a work machine, and includes a plurality of antennas provided on the attachments of the work machine and having different radio wave arrival areas, and the above-mentioned antenna. When the non-contact type tag is arranged between the work machine and the adjacent object and the non-contact type tag responds to the radio wave emitted by the antenna, the non-contact type tag is selected from the plurality of antennas. It is characterized by having a specific means for specifying the antenna that emits the responded radio wave, and an output means for outputting a signal corresponding to the antenna specified by the specific means.

According to the present invention, when the non-contact type tag responds to the radio wave emitted by the antenna, the antenna that emits the radio wave that the non-contact type tag responds to is specified from among a plurality of antennas. Then, a signal corresponding to the specified antenna is output. As a result, among the plurality of antennas, the correspondence can be different depending on the antenna to which the non-contact type tag responds. For example, when the non-contact type tag responds to the radio wave of an antenna having a wide radio wave reach area, a signal for slowing down the moving speed of the attachment is output, and the non-contact type tag responds to the radio wave of an antenna having a narrow radio wave reach area. When responding, it is possible to output a signal for stopping the movement of the attachment. Therefore, a plurality of types of correspondence can be performed.

It is the figure which looked at the periphery of the work machine from the side. It is the figure which looked at the periphery of the work machine from the top. It is a circuit diagram of an interference suppression device. It is a flowchart of interference suppression control. It is a circuit diagram of the interference suppression device in the modification.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(Structure of work machine)
The interference suppression device of the present embodiment suppresses interference between an adjacent object adjacent to a work object and a work machine. The work machine 10 is a machine that performs work with the attachment 20, for example, a hydraulic excavator, as shown in FIG. 1, which is a side view of the periphery of the work machine 10. The work machine 10 includes a lower traveling body 11, an upper rotating body 13, an attachment 20, and a cylinder 30.

The lower traveling body 11 is a portion for traveling the work machine 10, and includes, for example, a crawler. The upper swivel body 13 is rotatably attached to the lower traveling body 11 via a swivel device. A cab (driver's cab) 14 is provided at the front of the upper swivel body 13.

The attachment 20 is attached to the upper swing body 13. The attachment 20 includes a boom 21, an arm 23, and a bucket 25. The boom 21 is rotatably (undulating) attached to the upper swing body 13. The arm 23 is rotatably attached to the boom 21. The bucket 25 is rotatably attached to the arm 23. The bucket 25 is a part of a work target (earth and sand, etc.) for excavating, leveling, scooping, and the like.

The cylinder (driving means) 30 operates the attachment 20. The cylinder 30 is a hydraulic telescopic cylinder. The cylinder 30 includes a boom cylinder 31, an arm cylinder 33, and a bucket cylinder 35.

The boom cylinder 31 rotationally drives the boom 21 with respect to the upper swing body 13. The base end portion of the boom cylinder 31 is rotatably attached to the upper swing body 13. The tip of the boom cylinder 31 is rotatably attached to the boom 21.

The arm cylinder 33 rotationally drives the arm 23 with respect to the boom 21. The base end portion of the arm cylinder 33 is rotatably attached to the boom 21. The tip of the arm cylinder 33 is rotatably attached to the arm 23.

The bucket cylinder 35 rotationally drives the bucket 25 with respect to the arm 23. The base end portion of the bucket cylinder 35 is rotatably attached to the arm 23. The tip of the bucket cylinder 35 is rotatably attached to a link member rotatably attached to the bucket 25.

A protective net 60 for protecting the adjacent object 50 is installed between the work machine 10 and the adjacent object 50, more specifically, between the work object 40 and the adjacent object 50.

(Configuration of interference suppression device)
As shown in FIG. 2, which is a view of the periphery of the work machine 10 from above, the interference suppression device 1 has a plurality of antennas 2 and a non-contact type tag 3.

Each of the plurality of antennas 2 is provided on the attachment 20 of the work machine 10. In the present embodiment, the plurality of antennas 2 are provided on the arm 23, respectively, but may be provided on the boom 21 or the bucket 25.

In this embodiment, the arm 23 is provided with two antennas 2. The number of antennas 2 is not limited to this. The two antennas 2 have different radio wave arrival areas. Here, the radio wave arrival area is an area having a certain level or more of radio wave strength required for the non-contact type tag 3 to respond. Specifically, the radio wave reach area of the antenna 2a on the right side in the figure is wider than the radio wave reach area of the antenna 2b on the left side in the figure.

In the present embodiment, the radio waves emitted by the two antennas 2 have different frequencies from each other. As a result, the radio wave arrival areas of the two antennas 2 are set to be different from each other.

The non-contact type tag 3 is arranged between the work machine 10 and the adjacent object 50. In this embodiment, the non-contact type tag 3 is provided on the protective net 60. Further, in the present embodiment, a plurality of non-contact type tags 3 are arranged side by side at predetermined intervals in the horizontal direction and the vertical direction, respectively.

As described above, by providing the non-contact type tag 3 on the protective net 60 installed between the work machine 10 and the adjacent object 50, it is not necessary to separately provide a means for arranging the non-contact type tag 3. As a result, it is possible to reduce the labor and cost of installing the non-contact type tag 3.

In the present embodiment, the non-contact type tag 3 is a passive type RFID tag (radio frequency identification tag), which performs wireless communication using radio waves from the outside as a power source and exchanges information. Therefore, since the non-contact type tag 3 does not require a wired power supply, it can be easily provided on the protective net 60. The non-contact type tag 3 is not limited to this. Each of the non-contact type tags 3 stores identification information for identifying itself. This identification information is, for example, a serial number.

Here, in the present embodiment, there are a plurality of adjacent objects 50, and a protective net 60 and a non-contact type tag 3 are provided for each of the plurality of adjacent objects 50. In the storage device 8 (see FIG. 3) described later, the identification information stored in the non-contact type tag 3 is associated with the information of the adjacent object 50. Specifically, the identification information stored in each of the non-contact type tags 3 adjacent to the adjacent object 50a on the upper side in the figure is associated with the information on the adjacent object 50a, and is not adjacent to the adjacent object 50b on the right side in the figure. The identification information stored in each of the contact type tags 3 is associated with the information of the adjacent object 50b. Here, the information on the adjacent object 50 is information such as what the adjacent object 50 is (house, building, etc.).

Each of the non-contact type tags 3 transmits identification information in response to radio waves emitted by the antenna 2.

It should be noted that the plurality of adjacent objects 50 may be a plurality of locations such as the same building instead of separate buildings and the like. For example, the plurality of adjacent objects 50 may be the roof or wall of the same house. In this case, the information on the adjacent object 50 is information such as which part of the adjacent object 50 is a building or the like (roof, wall, etc.). Further, the number of adjacent objects 50 may not be plural.

As shown in FIG. 3, which is a circuit diagram of the interference suppression device 1, the interference suppression device 1 includes a controller 4 and a storage device (storage means) 8. The antenna 2 emits a radio wave for detecting the non-contact type tag 3. The non-contact type tag 3 transmits identification information when the arm 23 approaches the non-contact type tag 3 and responds to a radio wave emitted by the antenna 2. The antenna 2 receives the identification information transmitted by the non-contact type tag 3 in response to the radio wave emitted by the antenna 2. The controller 4 receives the identification information of the non-contact type tag 3 via the antenna 2. As a result, the controller (specific means) 4 identifies the antenna 2 that emits the radio wave responded by the non-contact type tag 3 from the plurality of antennas 2. In FIG. 2, the non-contact tag 3 responds to the radio wave of the antenna 2a on the right side.

The storage device 8 stores the identification information of each of the non-contact type tags 3 in association with the information of the adjacent object 50. From the received identification information, the controller 4 identifies the adjacent object 50 adjacent to the non-contact type tag 3 in response to the radio wave emitted by the antenna 2. The controller 4 may display information on the specified adjacent object 50 on a display (not shown) provided in the cab 14 (see FIG. 1).

Further, the controller (output means) 4 outputs a signal corresponding to the specified antenna 2. In the present embodiment, the signal corresponding to the antenna 2 on the right side of FIG. 2 is a signal for decelerating the moving speed of the attachment 20, and the signal corresponding to the antenna 2 on the left side of FIG. 2 causes the movement of the attachment 20. It is a signal to stop.

In this way, by outputting the signal corresponding to the antenna 2 responded by the non-contact type tag 3, the correspondence can be different depending on the antenna 2 responded by the non-contact type tag 3. Therefore, a plurality of types of correspondence can be performed.

Further, the interference suppression device 1 further includes an alarm device (alarm means) 5. The alarm device 5 is capable of issuing an alarm, and in the present embodiment, it is a speaker and a display. The alarm device 5 is provided in the cab 14 (see FIG. 1).

The controller 4 generates an alarm from the alarm device 5 according to the signal output by the controller 4. That is, the controller 4 generates an alarm corresponding to the specified antenna 2 from the alarm device 5. In the present embodiment, the alarm corresponding to the antenna 2 on the right side of FIG. 2 is a low-level alarm indicating that the attachment 20 has approached the adjacent object 50, but there is a margin in the distance between the work machine 10 and the adjacent object 50. Is. On the other hand, the alarm corresponding to the antenna 2 on the left side of FIG. 2 is a high-level alarm indicating that the attachment 20 approaches the adjacent object 50 and there is no margin in the distance between the work machine 10 and the adjacent object 50.

In this way, by generating an alarm according to the antenna 2 responded by the non-contact type tag 3, the operator can reduce the moving speed of the attachment 20 or move the attachment 20 according to the type of the alarm. Different actions can be taken, such as stopping.

Further, the interference suppression device 1 further has a cylinder 30 (see FIG. 1) for operating the attachment 20. The controller 4 causes the cylinder 30 to operate in response to the signal output by the controller 4. That is, the controller 4 causes the cylinder 30 to perform an operation according to the specified antenna 2. In the present embodiment, the operation according to the antenna 2 on the right side of FIG. 2 is an operation to reduce the moving speed of the attachment 20, and the operation according to the antenna 2 on the left side of FIG. 2 stops the movement of the attachment 20. It is working.

In this way, by causing the cylinder 30 to operate according to the antenna 2 responded by the non-contact type tag 3, the operation of the attachment 20 can be made different according to the antenna 2 responded by the non-contact type tag 3. can.

(Operation of interference suppression device)
Next, the operation of the interference suppression device 1 will be described with reference to FIG. 4, which is a flowchart of the interference suppression control.

First, the controller 4 determines whether or not the non-contact tag 3 responds to any of the plurality of antennas 2 (step S1). If it is determined in step S1 that the non-contact tag 3 is not responding to any of the plurality of antennas 2 (S1: NO), the controller 4 repeats step S1. On the other hand, if it is determined in step S1 that the non-contact type tag 3 responds to any of the plurality of antennas 2 (S1: YES), the controller 4 identifies the antenna 2 to which the non-contact type tag 3 responds. (Step S2).

Next, the controller 4 identifies the adjacent object 50 that the arm 23 has approached from the identification information of the non-contact type tag 3 that responded (step S3). Then, the controller 4 outputs an alarm corresponding to the specified antenna 2 from the alarm device 5 (step S4). Further, the controller 4 causes the cylinder 30 to perform an operation according to the specified antenna 2 (step S5). Then, the process returns to step S1.

(Modification example)
As shown in FIG. 5, which is a circuit diagram of the interference suppression device 1, the interference suppression device 1 may further include an amplifier 6 for adjusting the output of the antenna 2. By adjusting the output of the antenna 2 with the amplifier 6, the electric field strengths of the radio waves emitted by the two antennas 2 can be made different from each other. As a result, the radio wave arrival areas of the two antennas 2 can be made different from each other.

(effect)
As described above, according to the interference suppression device 1 according to the present embodiment, when the non-contact type tag 3 responds to the radio wave emitted by the antenna 2, the non-contact type tag 3 is selected from the plurality of antennas 2. Identify the antenna 2 that emitted the radio wave that responded to. Then, a signal corresponding to the specified antenna 2 is output. As a result, among the plurality of antennas 2, the correspondence can be different depending on the antenna 2 to which the non-contact type tag 3 responds. For example, when the non-contact tag 3 responds to the radio wave of the antenna 2a having a wide radio wave reach area, it outputs a signal for decelerating the moving speed of the attachment 20 and does not correspond to the radio wave of the antenna 2b having a narrow radio wave reach area. When the contact type tag 3 responds, it is possible to output a signal for stopping the movement of the attachment 20. Therefore, a plurality of types of correspondence can be performed.

Further, the alarm device 5 generates an alarm according to the signal output by the controller 4. As a result, the operator can take different measures such as slowing down the moving speed of the attachment 20 or stopping the movement of the attachment 20 depending on the type of alarm. For example, when the non-contact tag 3 responds to the radio wave of the antenna 2a having a wide radio wave reach area, a low-level alarm indicating that there is a sufficient distance between the work machine 10 and the adjacent object 50 is generated, and the radio wave is generated. When the non-contact type tag 3 responds to the radio wave of the antenna 2b having a narrow reach area, it is possible to generate a high-level alarm indicating that there is no margin in the distance between the work machine 10 and the adjacent object 50.

Further, the cylinder 30 is made to perform an operation according to the signal output by the controller 4. As a result, the operation of the attachment 20 can be made different depending on the antenna 2 to which the non-contact tag 3 responds. For example, when the non-contact tag 3 responds to the radio wave of the antenna 2a having a wide radio wave reach area, the moving speed of the attachment 20 is reduced, and the non-contact tag 3 responds to the radio wave of the antenna 2b having a narrow radio wave reach area. If so, the movement of the attachment 20 can be stopped.

Further, by providing the non-contact type tag 3 on the protective net 60 installed between the work machine 10 and the adjacent object 50, it is not necessary to separately provide a means for arranging the non-contact type tag 3. As a result, it is possible to reduce the labor and cost of installing the non-contact type tag 3.

Further, by making the frequencies of the radio waves emitted by the plurality of antennas 2 different from each other, it is possible to preferably make the radio wave arrival areas different from each other.

Further, by making the outputs of the radio waves emitted by the plurality of antennas 2 different from each other, it is possible to preferably make the radio wave arrival areas different from each other.

Further, since the identification information stored in the non-contact type tag 3 and the information of the adjacent object 50 are stored in association with each other, the arm 23 receives the identification information of the non-contact type tag 3 in response to the radio wave emitted by the antenna 2. It is possible to identify what the adjacent object 50 is.

Although the embodiments of the present invention have been described above, only specific examples are illustrated, and the present invention is not particularly limited, and the specific configuration and the like can be appropriately redesigned. In addition, the actions and effects described in the embodiments of the present invention merely list the most preferable actions and effects arising from the present invention, and the actions and effects according to the present invention are described in the embodiments of the present invention. It is not limited to what has been done.

1 Interference suppression device 2 Antenna 3 Non-contact type tag 4 Controller (specific means, output means, alarm control means, drive control means)
5 Alarm device (alarm means)
6 Amplifier 8 Storage device (storage means)
10 Work machine 11 Lower traveling body 13 Upper rotating body 14 Cab 20 Attachment 21 Boom 23 Arm 25 Bucket 30 Cylinder (driving means)
31 Boom Cylinder 33 Arm Cylinder 35 Bucket Cylinder 40 Work Object 50 Adjacent Object 60 Protective Net

Claims (7)

An interference suppression device that suppresses interference between an adjacent object adjacent to a work object and a work machine.
A plurality of antennas provided on the attachments of the work machine and having different radio wave arrival areas, and
A non-contact tag placed between the work machine and the adjacent object,
When the non-contact type tag responds to the radio wave emitted by the antenna, the specific means for identifying the antenna that emits the radio wave emitted by the non-contact type tag from the plurality of antennas.
An output means that outputs a signal corresponding to the antenna specified by the specific means, and an output means.
An interference suppression device characterized by having. Alarm means that can issue an alarm,
An alarm control means for generating an alarm corresponding to the signal output by the output means from the alarm means, and
The interference suppression device according to claim 1, further comprising. The driving means for operating the attachment and
A drive control means that causes the drive means to perform an operation in response to the signal output by the output means.
The interference suppression device according to claim 1 or 2, further comprising. The interference suppression device according to any one of claims 1 to 3, wherein the non-contact type tag is provided on a protective net installed between the work machine and the adjacent object. The interference suppression device according to any one of claims 1 to 4, wherein the radio waves emitted by the plurality of antennas have different frequencies from each other. The interference suppression device according to any one of claims 1 to 4, wherein the radio waves emitted by the plurality of antennas have different outputs from each other. The non-contact type tag stores identification information for identifying itself, and transmits the identification information in response to a radio wave emitted by the antenna.
The interference suppression device according to any one of claims 1 to 6, further comprising a storage means for storing the identification information and the information of the adjacent object in association with each other.

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