JP2021128453A - Approach warning system - Google Patents
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Abstract
Description
本発明は、例えばフォークリフトやブルドーザなどの移動機器が往来する作業現場において、当該移動機器と作業者とが接近したことを検知して警報を発報する接近警報システムに関する。 The present invention relates to an approach warning system that detects that a mobile device such as a forklift or a bulldozer comes and goes, and issues an alarm when the mobile device and a worker approach each other.
かかる接近警報システムとして、誘導磁界（電磁誘導波）と電波を用いたものが知られており、本願出願人は特許文献１において、移動機器側に取り付けられた距離検知制御装置と作業者側に取り付けられたＲＦＩＤタグとの距離により警報のレベルを変えることを可能とし、更に警報を出力する距離を移動機器側で設定可能とした接近検知システムを開示した。
この特許文献１の接近警報システムは、移動機器（距離検知制御装置）と作業者（ＲＦＩＤタグ）との距離により警報のレベルを変えることで、作業者が移動機器に対してどの程度の距離まで接近しているかを把握することができる点で特にメリットがあり、実用化の実績も複数ある。
As such an approach warning system, a system using an induced magnetic field (electromagnetic induction wave) and a radio wave is known. We have disclosed an approach detection system that makes it possible to change the alarm level according to the distance from the attached RFID tag, and also allows the distance to output the alarm to be set on the mobile device side.
The approach warning system of Patent Document 1 changes the alarm level according to the distance between the mobile device (distance detection control device) and the worker (RFID tag), so that the worker can reach the distance to the mobile device. There is a particular merit in being able to grasp whether or not they are approaching, and there are several achievements in practical use.
本願発明者らは、実用化した特許文献１の接近警報システムのユーザより、移動機器に接近した作業者側でも警報を発報するようにしたいとのニーズを受け、ＲＦＩＤタグが誘導磁界を検知したときに警報を発報するタグ警報部をＲＦＩＤタグ側に追加した。
ところが、移動機器の移動方向（移動経路）が限られている（決まっている）作業現場では、その移動方向に接近した作業者に対してのみ警報を発報すればよいところ、誘導磁界は全方位に発信されるため、移動機器の移動方向以外に接近した作業者に対しても警報（不要な警報）が発報されることになる。
The inventors of the present application have received a need from users of the approach warning system of Patent Document 1 that has been put into practical use so that an alarm can be issued even on the side of an operator who is close to a mobile device, and the RFID tag detects an induced magnetic field. A tag alarm unit that issues an alarm when this is done has been added to the RFID tag side.
However, at a work site where the moving direction (moving path) of the mobile device is limited (fixed), an alarm needs to be issued only to the worker who approaches the moving direction, but the induced magnetic field is all. Since it is transmitted in the direction, an alarm (unnecessary alarm) is issued to an operator who approaches in a direction other than the moving direction of the mobile device.
本発明が解決しようとする課題は、不要な警報の発報を抑制できる接近警報システムを提供することにある An object to be solved by the present invention is to provide an approach warning system capable of suppressing the issuance of unnecessary warnings.
本発明の一観点によれば、次の接近警報システムが提供される。
移動機器と、作業者に取り付けられたＲＦＩＤタグとの接近を検知して警報を発報する接近警報システムであって、
移動機器は、誘導磁界を全方位に発信する誘導磁界発信部と、前記誘導磁界を検知したＲＦＩＤタグから発信される電波を受信する電波受信部と、超音波を特定方位に発信して作業者又は物体を検知する超音波センサと、これらを制御する機器制御部とを備え、
ＲＦＩＤタグは、前記誘導磁界発信部から発信される誘導磁界を検知する磁界センサ部と、前記磁界センサ部が前記誘導磁界を検知したときに電波を発信する電波発信部と、前記磁界センサ部が前記誘導磁界を検知したときに警報を発報するタグ警報部とを備え、
前記機器制御部は、前記超音波センサが作業者又は物体を検知していないときは、前記誘導磁界発信部から誘導磁界を発信させないか、又は前記誘導磁界発信部から発信される誘導磁界の発信範囲を標準の発信範囲より小さくし、前記超音波センサが作業者又は物体を検知したら、前記誘導磁界発信部から発信される誘導磁界の発信範囲を標準の発信範囲とする、接近警報システム。
According to one aspect of the present invention, the following approach warning system is provided.
An approach warning system that detects the approach between a mobile device and an RFID tag attached to an operator and issues an alarm.
Mobile devices include an induced magnetic field transmitting unit that emits an induced magnetic field in all directions, a radio wave receiving unit that receives radio waves transmitted from an RFID tag that detects the induced magnetic field, and an operator that transmits ultrasonic waves in a specific direction. Alternatively, it is equipped with an ultrasonic sensor that detects an object and a device control unit that controls them.
The RFID tag includes a magnetic field sensor unit that detects an induced magnetic field transmitted from the induced magnetic field transmitting unit, a radio wave transmitting unit that transmits radio waves when the magnetic field sensor unit detects the induced magnetic field, and the magnetic field sensor unit. It is equipped with a tag alarm unit that issues an alarm when the induced magnetic field is detected.
When the ultrasonic sensor does not detect an operator or an object, the device control unit does not transmit an induced magnetic field from the induced magnetic field transmitting unit, or transmits an induced magnetic field transmitted from the induced magnetic field transmitting unit. An approach warning system in which a range is made smaller than a standard transmission range, and when the ultrasonic sensor detects a worker or an object, the transmission range of the induced magnetic field transmitted from the induced magnetic field transmitting unit is set as the standard transmission range.
本発明の接近警報システムは、超音波を特定方位（典型的には移動機器の移動方向）に発信して作業者又は物体を検知する超音波センサを備え、この超音波センサが作業者又は物体を検知していないときは、誘導磁界を発信させないか又は誘導磁界の発信範囲を標準の発信範囲より小さくする。これにより、特定方位（典型的には移動機器の移動方向）以外に接近した作業者に対して不要な警報の発報を抑制できる。 The approach warning system of the present invention includes an ultrasonic sensor that detects a worker or an object by transmitting ultrasonic waves in a specific direction (typically, a moving direction of a mobile device), and the ultrasonic sensor is a worker or an object. When is not detected, the induced magnetic wave is not transmitted or the transmission range of the induced magnetic wave is made smaller than the standard transmission range. As a result, it is possible to suppress the issuance of unnecessary alarms to workers approaching other than a specific direction (typically, the moving direction of the mobile device).
図１に本発明の一実施形態である接近検知システムの全体構成を概念的に示し、図２及び図３にこの接近警報システムにおける移動機器及びＲＦＩＤタグの構成をそれぞれブロック図として示している。 FIG. 1 conceptually shows the overall configuration of the approach detection system according to the embodiment of the present invention, and FIGS. 2 and 3 show the configurations of the mobile device and the RFID tag in the approach warning system as block diagrams, respectively.
この実施形態において移動機器Ｘは例えばフォークリフトやブルドーザであり、図１において矢印方向が移動機器Ｘの移動方向（進行方向）である。
この移動機器Ｘは、図２に示しているように、誘導磁界を全方位に発信する誘導磁界発信部と、誘導磁界を検知したＲＦＩＤタグから発信される電波を受信する電波受信部と、超音波を特定方位（この実施形態では移動機器Ｘの移動方向）に発信して作業者又は物体を検知する超音波センサと、所定の条件下で警報を発報する機器警報部と、これらを制御する機器制御部とを備えている。なお、超音波センサからの超音波の発信範囲Ｕは図１において実線で概念的に示している。すなわち、この超音波センサは超音波を移動機器Ｘの移動方向（進行方向）に発信する。
In this embodiment, the mobile device X is, for example, a forklift or a bulldozer, and the direction of the arrow in FIG. 1 is the moving direction (traveling direction) of the mobile device X.
As shown in FIG. 2, the mobile device X includes an induced magnetic wave transmitting unit that emits an induced magnetic wave in all directions, a radio wave receiving unit that receives radio waves transmitted from an RFID tag that detects the induced magnetic field, and an ultrasonic wave receiving unit. Controls an ultrasonic sensor that detects a worker or an object by transmitting sound waves in a specific direction (in this embodiment, the moving direction of the mobile device X), and a device alarm unit that issues an alarm under predetermined conditions. It is equipped with a device control unit. The ultrasonic wave transmission range U from the ultrasonic sensor is conceptually shown by a solid line in FIG. That is, this ultrasonic sensor transmits ultrasonic waves in the moving direction (traveling direction) of the mobile device X.
図１において作業者ＡはＲＦＩＤタグａを持ち、移動機器Ｘの移動方向以外に接近している。
このＲＦＩＤタグａは、図３に示しているように、移動機器Ｘの誘導磁界発信部から発信される誘導磁界を検知する磁界センサ部と、この磁界センサ部が誘導磁界を検知したときに誘導磁界を検知した旨の情報及び自己の固有ＩＤ情報を含む電波を発信する電波発信部と、磁界センサ部が誘導磁界を検知したときに警報を発報するタグ警報部と、これらを制御するタグ制御部とを備え、更に直流電源としてバッテリを備えている。
In FIG. 1, the worker A holds the RFID tag a and is approaching the mobile device X in a direction other than the moving direction.
As shown in FIG. 3, the RFID tag a has a magnetic field sensor unit that detects an induced magnetic field transmitted from an induced magnetic field transmitting unit of the mobile device X, and an induction magnetic field sensor unit that induces when the magnetic field sensor unit detects an induced magnetic field. A radio wave transmitting unit that emits a radio wave including information indicating that a magnetic field has been detected and its own unique ID information, a tag alarm unit that issues an alarm when the magnetic field sensor unit detects an induced magnetic field, and a tag that controls these. It is equipped with a control unit and a battery as a DC power source.
この実施形態に係る接近警報システムの動作は以下のとおりである。
まず、機器制御部は、超音波センサが作業者又は物体を検知していないときは、誘導磁界発信部から誘導磁界を発信させないか、又は誘導磁界発信部から発信される誘導磁界の発信範囲を標準の発信範囲Ｍｓ（図４参照）より小さい発信範囲Ｍｉ（図１参照）とする。この状態では、超音波を発信する特定方位（この実施形態では移動機器の移動方向）以外に接近した作業者Ａに取り付けられたＲＦＩＤタグａは誘導磁界を検知しないので、そのタグ警報部から警報は発報されない。
The operation of the approach warning system according to this embodiment is as follows.
First, when the ultrasonic sensor does not detect an operator or an object, the device control unit does not transmit the induced magnetic field from the induced magnetic field transmitting unit, or determines the transmission range of the induced magnetic field transmitted from the induced magnetic field transmitting unit. A transmission range Mi (see FIG. 1) smaller than the standard transmission range Ms (see FIG. 4). In this state, the RFID tag a attached to the worker A who approaches other than the specific direction (in this embodiment, the moving direction of the mobile device) that emits ultrasonic waves does not detect the induced magnetic field, so that the tag alarm unit gives an alarm. Will not be reported.
次に、超音波センサが作業者又は物体を検知したら、機器制御部は、誘導磁界発信部から発信される誘導磁界の発信範囲を標準の発信範囲Ｍｓ（図４参照）とする。図４では超音波センサが作業者Ａを検知した場合を示しており、誘導磁界の発信範囲Ｍｓは、図１の発信範囲Ｍｉより拡大されている。この状態では、超音波を発信する特定方位（この実施形態では移動機器の移動方向）に接近した作業者Ａに取り付けられたＲＦＩＤタグａは誘導磁界を検知するので、そのタグ警報部から警報が発報される。 Next, when the ultrasonic sensor detects an operator or an object, the device control unit sets the transmission range of the induced magnetic field transmitted from the induced magnetic field transmitting unit as the standard transmission range Ms (see FIG. 4). FIG. 4 shows a case where an ultrasonic sensor detects an operator A, and the transmission range Ms of the induced magnetic field is larger than the transmission range Mi of FIG. In this state, the RFID tag a attached to the worker A approaching a specific direction for transmitting ultrasonic waves (in this embodiment, the moving direction of the mobile device) detects an induced magnetic field, so that an alarm is issued from the tag alarm unit. Be notified.
このように、超音波センサが作業者又は物体を検知したときに誘導磁界の発信範囲を拡大させることで、図１に示すように超音波を発信する特定方位（この実施形態では移動機器の移動方向）以外に接近した作業者Ａに対しては、警報は発報されない。
一方、図４に示すように作業者Ａが超音波を発信する特定方位（この実施形態では移動機器の移動方向）に接近した場合、誘導磁界の発信範囲が拡大されるので、この作業者Ａに対しては警報が発報される。
このように、この実施形態によれば、作業者Ａに対して不要な警報の発報を抑制できる。なお、従来技術（例えば特許文献１）では、誘導磁界の発信範囲は常に標準の発信範囲Ｍｓであるので、図１における作業者Ａに対しても警報（不要な警報）が発報される。
In this way, by expanding the transmission range of the induced magnetic field when the ultrasonic sensor detects a worker or an object, a specific direction for transmitting ultrasonic waves as shown in FIG. 1 (movement of a mobile device in this embodiment). No alarm is issued to the worker A who approaches other than the direction).
On the other hand, as shown in FIG. 4, when the worker A approaches a specific direction for transmitting ultrasonic waves (in this embodiment, the moving direction of the mobile device), the transmission range of the induced magnetic field is expanded, so that the worker A An alarm is issued for.
As described above, according to this embodiment, it is possible to suppress the issuance of an unnecessary alarm to the worker A. In the prior art (for example, Patent Document 1), the transmission range of the induced magnetic field is always the standard transmission range Ms, so that an alarm (unnecessary alarm) is also issued to the worker A in FIG.
ここで、標準の発信範囲Ｍｓの大きさは適宜設定することができるが、超音波の発信範囲Ｕと同等又はそれ以上の大きさとすることが好ましい。例えば、超音波の発信範囲Ｕ（長さ）は最大で１０ｍ程度であるから、標準の発信範囲Ｍｓ（楕円の長半径）は１２ｍ程度とすることができる。なお、標準の発信範囲Ｍｓの大きさは一種に固定する必要はなく、複数種とすることもできる。すなわち、標準の発信範囲Ｍｓの大きさは可変とすることもできる。 Here, the size of the standard transmission range Ms can be set as appropriate, but it is preferable that the size is equal to or larger than the ultrasonic transmission range U. For example, since the ultrasonic wave transmission range U (length) is about 10 m at the maximum, the standard transmission range Ms (semi-major axis of the ellipse) can be about 12 m. The size of the standard transmission range Ms does not have to be fixed to one type, and may be a plurality of types. That is, the magnitude of the standard transmission range Ms can be made variable.
また、超音波センサが作業者又は物体を検知していないときの誘導磁界の発信範囲Ｍｉの大きさも適宜設定することができ、例えば楕円の長半径で０．５〜１ｍ程度とすることができる。なお、超音波センサが作業者又は物体を検知していないときは、上述のとおり誘導磁界を発信しないようにすることもできるが、超音波を発信する特定方位（この実施形態では移動機器の移動方向）以外であっても移動機器の間近に接近した作業者に対して警報を発報できるように、超音波センサが作業者又は物体を検知していないときも必要最小限の発信範囲で誘導磁界を発信することが好ましい。この必要最小限の発信範囲の一例が、図１に示す発信範囲Ｍｉである。すなわち、この必要最小限の発信範囲とは、移動機器Ｘの間近の領域をカバーする範囲である。 Further, the size of the transmission range Mi of the induced magnetic field when the ultrasonic sensor does not detect an operator or an object can be appropriately set, and for example, the semimajor axis of the ellipse can be set to about 0.5 to 1 m. .. When the ultrasonic sensor does not detect an operator or an object, it is possible to prevent the induced magnetic field from being transmitted as described above, but the specific direction in which the ultrasonic wave is transmitted (in this embodiment, the movement of the mobile device). Even when the ultrasonic sensor is not detecting an operator or an object, it is guided within the minimum necessary transmission range so that an alarm can be issued to an operator who is close to the mobile device even if it is not in the direction). It is preferable to transmit a magnetic field. An example of this minimum necessary transmission range is the transmission range Mi shown in FIG. That is, the minimum necessary transmission range is a range that covers a region close to the mobile device X.
この実施形態において機器警報部は、上述のとおり所定の条件下で警報を発報する。例えば、電波受信部がＲＦＩＤタグからの電波を受信し、かつ超音波センサが作業者又は物体を検知するという条件で警報を発報するようにすることができる。あるいは、電波受信部がＲＦＩＤタグからの電波を受信するのみという条件で警報を発報するようにすることもでき、これら条件の違いによって異なる種類の警報をそれぞれ発報するようにすることもできる。 In this embodiment, the device alarm unit issues an alarm under predetermined conditions as described above. For example, an alarm can be issued on the condition that the radio wave receiving unit receives the radio wave from the RFID tag and the ultrasonic sensor detects an operator or an object. Alternatively, it is possible to issue an alarm on the condition that the radio wave receiving unit only receives the radio wave from the RFID tag, and it is also possible to issue different types of alarms depending on the difference in these conditions. ..
なお、以上の実施形態は、単一の誘導磁界発信部を備えるものであったが、複数の誘導磁界発信部を備えるものとすることもできる。また、以上の実施形態では作業者は一人であったが、作業者は複数人であっても問題なく動作する。 Although the above embodiment includes a single induced magnetic field transmitting unit, it may also include a plurality of induced magnetic field transmitting units. Further, in the above embodiment, there is only one worker, but even if there are a plurality of workers, the operation can be performed without any problem.
Ｘ 移動機器
Ａ 作業者
ａ ＲＦＩＤタグ
X Mobile device A Worker a RFID tag
Claims (1)
移動機器は、誘導磁界を全方位に発信する誘導磁界発信部と、前記誘導磁界を検知したＲＦＩＤタグから発信される電波を受信する電波受信部と、超音波を特定方位に発信して作業者又は物体を検知する超音波センサと、これらを制御する機器制御部とを備え、
ＲＦＩＤタグは、前記誘導磁界発信部から発信される誘導磁界を検知する磁界センサ部と、前記磁界センサ部が前記誘導磁界を検知したときに電波を発信する電波発信部と、前記磁界センサ部が前記誘導磁界を検知したときに警報を発報するタグ警報部とを備え、
前記機器制御部は、前記超音波センサが作業者又は物体を検知していないときは、前記誘導磁界発信部から誘導磁界を発信させないか、又は前記誘導磁界発信部から発信される誘導磁界の発信範囲を標準の発信範囲より小さくし、前記超音波センサが作業者又は物体を検知したら、前記誘導磁界発信部から発信される誘導磁界の発信範囲を標準の発信範囲とする、接近警報システム。 An approach warning system that detects the approach between a mobile device and an RFID tag attached to an operator and issues an alarm.
Mobile devices include an induced magnetic field transmitting unit that emits an induced magnetic field in all directions, a radio wave receiving unit that receives radio waves transmitted from an RFID tag that detects the induced magnetic field, and an operator that transmits ultrasonic waves in a specific direction. Alternatively, it is equipped with an ultrasonic sensor that detects an object and a device control unit that controls them.
The RFID tag includes a magnetic field sensor unit that detects an induced magnetic field transmitted from the induced magnetic field transmitting unit, a radio wave transmitting unit that transmits radio waves when the magnetic field sensor unit detects the induced magnetic field, and the magnetic field sensor unit. It is equipped with a tag alarm unit that issues an alarm when the induced magnetic field is detected.
When the ultrasonic sensor does not detect an operator or an object, the device control unit does not transmit an induced magnetic field from the induced magnetic field transmitting unit, or transmits an induced magnetic field transmitted from the induced magnetic field transmitting unit. An approach warning system in which a range is made smaller than a standard transmission range, and when the ultrasonic sensor detects a worker or an object, the transmission range of the induced magnetic field transmitted from the induced magnetic field transmitting unit is set as the standard transmission range.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08218310A (en) * | 1995-02-14 | 1996-08-27 | Sakai Heavy Ind Ltd | Human body detector |
| US20100289662A1 (en) * | 2008-01-11 | 2010-11-18 | John Dasilva | Personnel safety utilizing time variable frequencies |
| WO2012026411A1 (en) * | 2010-08-23 | 2012-03-01 | Tcm株式会社 | Industrial vehicle and alarm system in industrial vehicle |
| JP2016153558A (en) * | 2015-02-20 | 2016-08-25 | 株式会社Ｎｉｐｐｏ | Emergency shutdown device and emergency shutdown method of construction machine |
| US20180122218A1 (en) * | 2016-10-28 | 2018-05-03 | Brian Shanley | Proximity alarm system and method of operating same |
| JP2019060108A (en) * | 2017-09-26 | 2019-04-18 | 日立建機株式会社 | Worker approach notification system |
-
2020
- 2020-02-12 JP JP2020021766A patent/JP7414265B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08218310A (en) * | 1995-02-14 | 1996-08-27 | Sakai Heavy Ind Ltd | Human body detector |
| US20100289662A1 (en) * | 2008-01-11 | 2010-11-18 | John Dasilva | Personnel safety utilizing time variable frequencies |
| WO2012026411A1 (en) * | 2010-08-23 | 2012-03-01 | Tcm株式会社 | Industrial vehicle and alarm system in industrial vehicle |
| JP2016153558A (en) * | 2015-02-20 | 2016-08-25 | 株式会社Ｎｉｐｐｏ | Emergency shutdown device and emergency shutdown method of construction machine |
| US20180122218A1 (en) * | 2016-10-28 | 2018-05-03 | Brian Shanley | Proximity alarm system and method of operating same |
| JP2019060108A (en) * | 2017-09-26 | 2019-04-18 | 日立建機株式会社 | Worker approach notification system |
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