JP2006250582A - Rfid tag with load sensor - Google Patents

Rfid tag with load sensor Download PDF

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JP2006250582A
JP2006250582A JP2005064440A JP2005064440A JP2006250582A JP 2006250582 A JP2006250582 A JP 2006250582A JP 2005064440 A JP2005064440 A JP 2005064440A JP 2005064440 A JP2005064440 A JP 2005064440A JP 2006250582 A JP2006250582 A JP 2006250582A
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load
load sensor
rfid tag
light emitting
magnitude
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Shinichi Ehata
伸一 江幡
Shigeru Shimada
繁 島田
Takeshi Yoshimura
剛 吉村
Tokuo Shimizu
徳雄 清水
Yasushi Yoshimura
康史 吉村
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Hitachi Plant Technologies Ltd
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Hitachi Plant Technologies Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an RFID tag with a load sensor having an inexpensive and small-sized constitution, capable of confirming the stage of a load applied to a crane immediately from a separated place, and heightening safety and efficiency of a working environment. <P>SOLUTION: This RFID tag 10 is equipped with the load sensor 11 for detecting the magnitude of a load, a light emitting part 12 wherein the emission state is changed by a signal from the load sensor 11, and a power source part 15 for supplying the power to the load sensor 11 and the light emitting part 12. The load applied to the crane can be confirmed with the inexpensive and small-sized constitution by the RFID tag 10 immediately from a separated place, to thereby heighten safety and efficiency of the working environment. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、揚重機にかかる荷重の大きさを離れた場所から確認することが可能な荷重センサ付きＲＦＩＤタグに関するものである。   The present invention relates to an RFID tag with a load sensor capable of confirming the magnitude of a load applied to a lifting machine from a remote location.

建設現場などでは、資材の移動、及び仮吊り等を行う際にチェーンブロックやクレーンなどの揚重機を用いている。資材は、幾つかの揚重機での相吊り、又は移動中の姿勢変化などにより、一つの揚重機へ予想外の大きな荷重がかかる場合がある。また、長期間資材を吊り下げ、高負荷状態で揚重機を放置する場合があり、揚重機の一部が変形して危険な状態になることがある。この為、資材吊り下げ時の揚重機の状態を常時知る必要があり、例えばクレーンのフック部にセンサを取り付けてフック部の揺れを自動的に検知するクレーン吊り具などが考案されている(例えば、特許文献１参照。)。その他、従来から揚重機にロードセルを取り付けるなどの対策が取られている。
特開平７−１７２７６４号公報 In construction sites and the like, lifting machines such as chain blocks and cranes are used when moving materials and temporarily suspending materials. A material may be subjected to an unexpectedly large load on a single lifting machine due to the suspension of several lifting machines or a change in posture during movement. In addition, the material may be suspended for a long time and the lifting machine may be left under a high load condition, and a part of the lifting machine may be deformed to be in a dangerous state. For this reason, it is necessary to always know the state of the lifting machine when suspending the material.For example, a crane lifting tool has been devised that automatically detects the swing of the hook part by attaching a sensor to the hook part of the crane (for example, , See Patent Document 1). In addition, measures such as attaching a load cell to a lifting machine have been taken.
Japanese Patent Laid-Open No. 7-17264

しかし、ロードセルは大型で高価であり、建設現場内では数千もの多くの揚重機が使用されている場合もあり、全ての揚重機にロードセルを取り付けることは困難であった。また、ロードセルや、特許文献１に開示されている様なセンサでは、センサ部の信号を外部の処理装置へ送る為の長いケーブルを設置する必要があり、建設現場で使用する際の障害となっていた。   However, the load cell is large and expensive, and thousands of heavy lifting machines may be used in the construction site, and it is difficult to attach the load cell to all the lifting machines. In addition, in a load cell or a sensor as disclosed in Patent Document 1, it is necessary to install a long cable for sending the signal of the sensor unit to an external processing device, which becomes an obstacle when used at a construction site. It was.

本発明はこのような問題に対してなされたもので、安価で小型な構成であって、揚重機にかかる荷重の大きさを離れた場所から直ちに確認することができ、作業環境をより安全で効率的にする荷重センサ付きＲＦＩＤ（Ｒａｄｉｏ Ｆｒｅｑｕｅｎｃｙ ＩＤｅｎｔｉｆｉｃａｔｉｏｎ）タグを提供することを目的としている。   The present invention has been made for such a problem, and has an inexpensive and small configuration, and can immediately check the magnitude of the load applied to the lifting machine from a remote location, thereby making the work environment safer. An object of the present invention is to provide an RFID (Radio Frequency IDentification) tag with an efficient load sensor.

本発明は前記目的を達成するために、請求項１に記載の発明は、荷重の大きさを検知する荷重センサと、前記荷重センサからの信号により発光状態が変化する発光部と、前記荷重センサと前記発光部とへ電力を供給する電源部と、を備えたことを特徴としている。   In order to achieve the above object, the present invention according to claim 1 includes a load sensor that detects a magnitude of a load, a light emitting unit that changes a light emitting state in accordance with a signal from the load sensor, and the load sensor. And a power supply unit for supplying power to the light emitting unit.

請求項１の発明によれば、ＲＦＩＤへ設けられた荷重センサにより、取り付けられた揚重機にかかる荷重の大きさを検知する。発光部は、検知された荷重の大きさにより赤色、青色、点灯、又は点滅など発光状態を変化させる。これにより、安価で小型の構成で、遠く離れた場所からでも発光状態により揚重機にどの程度の荷重が発生しているか、又は無負荷状態であるのかを知ることが可能となり、作業環境をより安全で効率的にする。   According to invention of Claim 1, the magnitude | size of the load concerning the attached lifting machine is detected by the load sensor provided in RFID. The light emitting unit changes the light emission state such as red, blue, lighting, or blinking according to the detected load. As a result, it is possible to know how much load is generated in the lifting machine due to the light emission state from a remote place with an inexpensive and small configuration, or in a no-load state, and the working environment can be further improved. Make it safe and efficient.

また、ＲＦＩＤに記録されている識別ＩＤにより、無線で個々のタグを特定することが可能であり、外部からの信号で特定の識別ＩＤを持つ荷重センサ付きＲＦＩＤタグの発光部を発光させることが可能である。これにより、多数存在する揚重機の中から特定の揚重機を容易に発見することが可能となる。   In addition, it is possible to specify individual tags wirelessly by the identification ID recorded in the RFID, and the light emitting part of the RFID tag with a load sensor having the specific identification ID can be caused to emit light by an external signal. Is possible. This makes it possible to easily find a specific lifting machine from among a large number of lifting machines.

更に、ＲＦＩＤから送信される信号を複数の受信装置で受信することにより、信号の送信を行なっている荷重センサ付きＲＦＩＤタグが取り付けられた揚重機の位置を知ることもできる。   Furthermore, by receiving signals transmitted from the RFID with a plurality of receiving devices, it is possible to know the position of the lifting machine to which the RFID tag with load sensor that is transmitting the signal is attached.

請求項２に記載の発明は、請求項１の発明において、前記荷重センサは、歪ゲージであることを特徴としている。   According to a second aspect of the present invention, in the first aspect of the invention, the load sensor is a strain gauge.

請求項２の発明によれば、取り付けられた部分に発生した荷重による歪みを電気信号として検知することが可能となり、電気信号の変化から揚重機にかかる荷重の大きさを直ちに知ることが可能となる。   According to the second aspect of the present invention, it is possible to detect the strain due to the load generated in the attached portion as an electric signal, and it is possible to immediately know the magnitude of the load applied to the lifting machine from the change of the electric signal. Become.

請求項３に記載の発明は、請求項１又は請求項２の発明において、前記荷重センサ付きＲＦＩＤタグは、配管資材の仮吊りに使用されるチェーンブロックに取り付けられ、前記チェーンブロックに掛かる荷重を検知することを特徴としている。   The invention according to claim 3 is the invention according to claim 1 or 2, wherein the RFID tag with a load sensor is attached to a chain block used for temporarily suspending piping materials, and the load applied to the chain block is measured. It is characterized by detection.

請求項３の発明によれば、揚重機としてチェーンブロックを使用して配管資材の仮吊り作業を行なう場合、チェーンブロックに発生している荷重の大きさを離れた場所から直ちに確認することが可能となり、作業環境をより安全で効率的にする。   According to the third aspect of the present invention, when temporarily suspending piping materials using a chain block as a lifting machine, it is possible to immediately confirm the magnitude of the load generated on the chain block from a remote location. And make the work environment safer and more efficient.

以上説明したように、本発明の荷重センサ付きＲＦＩＤタグによれば、安価で小型の構成により、揚重機にかかる荷重を離れた場所から直ちに確認すること、または揚重機の位置及び使用状況を知ることができるので、作業環境をより安全で効率的にすることが可能になる。   As described above, according to the RFID tag with a load sensor of the present invention, it is possible to immediately confirm the load applied to the lifting machine from a remote place or to know the position and usage status of the lifting machine with an inexpensive and small configuration. It is possible to make the work environment safer and more efficient.

以下添付図面に従って本発明に係る荷重センサ付きＲＦＩＤタグの好ましい実施の形態について詳説する。各図において同一部材には同一の番号または記号を付している。   A preferred embodiment of an RFID tag with a load sensor according to the present invention will be described in detail below with reference to the accompanying drawings. In each figure, the same number is attached to the same member.

最初に、本発明に係る荷重センサ付きＲＦＩＤタグの構成について説明する。図１は本発明に係る荷重センサ付きＲＦＩＤタグの構成を模式的に表した図である。   First, the configuration of the RFID tag with a load sensor according to the present invention will be described. FIG. 1 is a diagram schematically showing the configuration of an RFID tag with a load sensor according to the present invention.

図１に示すように、ＲＦＩＤタグ１０には、荷重センサ１１、発光部１２、メモリ部１３、送受信部１４、及び電源部１５が備えられている。   As shown in FIG. 1, the RFID tag 10 includes a load sensor 11, a light emitting unit 12, a memory unit 13, a transmission / reception unit 14, and a power supply unit 15.

荷重センサ１１は、ＲＦＩＤタグ１０の片面に設けられており、測定する個所に接触固定される。荷重センサ１１は、例えば歪ゲージを用いた荷重センサを好適に用いることができ、揚重機へ接触固定することで荷重による歪を電気信号に変換し、荷重がどの程度の大きさであるか検知する。   The load sensor 11 is provided on one side of the RFID tag 10 and is fixed in contact with a location to be measured. As the load sensor 11, for example, a load sensor using a strain gauge can be suitably used, and the strain due to the load is converted into an electric signal by contact and fixing to the lifting machine, and the magnitude of the load is detected. To do.

発光部１２は、ＲＦＩＤタグ１０の荷重センサ１１が設けられた面とは反対側の面に設けられている。発光部１２は、赤色、青色等数色の発光色を持ち、点灯、点滅など発光状態を変える。発光状態は、荷重センサ１１が検知した荷重の大きさ、又は外部からの信号により数段階に変化する。   The light emitting unit 12 is provided on a surface opposite to the surface on which the load sensor 11 of the RFID tag 10 is provided. The light emitting unit 12 has several emission colors such as red and blue, and changes the light emission state such as lighting and blinking. The light emission state changes in several stages depending on the magnitude of the load detected by the load sensor 11 or an external signal.

メモリ部１３は、ＲＦＩＤタグ１０を識別する為の識別ＩＤが予め記憶される。その他、メモリ部１３は荷重センサ１１が検知した荷重の大きさを一時的に記憶する。   The memory unit 13 stores an identification ID for identifying the RFID tag 10 in advance. In addition, the memory unit 13 temporarily stores the magnitude of the load detected by the load sensor 11.

送受信部１４は、無線でデータを送受信する為のアンテナを備えており、これにより識別ＩＤや検知された荷重の大きさを外部送受信装置１６へ送信する、又は外部からの信号を受信する。外部送受信装置１６としては、例えば、ＲＦＩＤタグ１０を使用している建設現場内に設置された信号の送受信を行なう複数のアンテナと、該アンテナに接続されたコンピュータとを好適に使用することができる。   The transmission / reception unit 14 includes an antenna for wirelessly transmitting / receiving data, thereby transmitting the identification ID and the detected magnitude of the load to the external transmission / reception device 16 or receiving a signal from the outside. As the external transmission / reception device 16, for example, a plurality of antennas that transmit and receive signals installed in a construction site that uses the RFID tag 10 and a computer connected to the antennas can be suitably used. .

電源部１５は、荷重センサ１１、発光部１２、メモリ部１３、及び送受信部１４の動作に必要な電力を各部へ供給する小型の電源装置である。必要に応じて交換することや、そのままの状態で充電することが可能である。   The power supply unit 15 is a small power supply device that supplies power necessary for the operation of the load sensor 11, the light emitting unit 12, the memory unit 13, and the transmission / reception unit 14 to each unit. It can be exchanged as necessary or charged as it is.

これらの構成により、本発明の荷重センサ付きＲＦＩＤタグ１０は安価で小型の構成であって、揚重機にかかる荷重を離れた場所から目視や、外部送受信装置１６等から直ちに確認することを可能にし、作業環境をより安全に保つことができる。   With these configurations, the RFID tag 10 with a load sensor according to the present invention is an inexpensive and small-sized configuration, and allows the load applied to the lifting machine to be visually confirmed from a remote location or immediately confirmed from the external transmission / reception device 16 or the like. , Can keep the working environment safer.

次に、本発明に係る荷重センサ付きＲＦＩＤタグの作用について、本実施例では揚重機としてチェーンブロックを例に挙げ、吊り上げる資材として配管資材を例に挙げて説明する。   Next, the operation of the RFID tag with a load sensor according to the present invention will be described using a chain block as an example of a lifting machine and a piping material as an example of a lifting material.

図２はＲＦＩＤタグ１０を揚重機へ取り付ける取り付け例を表した図である。図３はＲＦＩＤタグ１０が取り付けられた揚重機が配管資材を持ち上げた状態を表した図である。   FIG. 2 is a view showing an example of attaching the RFID tag 10 to the lifting machine. FIG. 3 is a view showing a state where the lifting machine to which the RFID tag 10 is attached lifts the piping material.

図２に示すように、揚重機（チェーンブロック）２０は、チェーン２３で吊るされたブロック２２にフック２１が取り付けられており、フック２１へロープやチェーンなどをかけて資材を吊り下げる。   As shown in FIG. 2, in the lifting machine (chain block) 20, a hook 21 is attached to a block 22 suspended by a chain 23, and a material such as a rope or chain is suspended from the hook 21.

ＲＦＩＤタグ１０は、荷重センサ１１が設けられた面がブロック２２へ接触固定されるようにチェーンブロック２０へ取り付けられる。ＲＦＩＤタグ１０は、吊り下げた資材の荷重によって発生する歪を電気信号に変換し、チェーンブロック２０に発生している荷重の大きさを検知する。   The RFID tag 10 is attached to the chain block 20 so that the surface on which the load sensor 11 is provided is fixed in contact with the block 22. The RFID tag 10 converts the strain generated by the load of the suspended material into an electrical signal, and detects the magnitude of the load generated in the chain block 20.

配管資材３０は図３に示すように、複数のロープ２４、２４・・を掛けられ、複数のチェーンブロック２０、２０・・により建設現場内に吊り下げられている。このとき、ブロック２２には、配管資材３０の荷重により微小な歪が発生する。   As shown in FIG. 3, the piping material 30 is hung by a plurality of ropes 24, 24... And is suspended in the construction site by a plurality of chain blocks 20, 20. At this time, a minute distortion is generated in the block 22 due to the load of the piping material 30.

歪は、各チェーンブロック２０のブロック２２に取り付けられたＲＦＩＤタグ１０の荷重センサ１１により電気信号に変換される。変換された電気信号より、チェーンブロック２０に発生している荷重の大きさが検知される。   The strain is converted into an electric signal by the load sensor 11 of the RFID tag 10 attached to the block 22 of each chain block 20. The magnitude of the load generated in the chain block 20 is detected from the converted electric signal.

各ＲＦＩＤ１０の発光部１２は、荷重センサ１１により検知された荷重の大きさに応じて、予め設定された荷重の大きさ毎に発光色や、点灯、又は点滅など発光状態を変化させる。例えば、荷重が検知されなかった場合は無点灯。チェーンブロック２０が破損する危険性のある荷重の３分の１程度までの荷重の場合は青色に点灯。危険性のある荷重の３分の１から３分の２程度までの荷重の場合は黄色に点灯。危険性のある荷重の３分の２以上の場合は赤色に点灯。危険性のある荷重を超えた場合は赤色に点滅する。尚、設定される荷重の大きさや、それに対応した発光状態は必要に応じて変更することが可能である。   The light emitting unit 12 of each RFID 10 changes a light emitting state such as a light emission color, lighting, or blinking for each predetermined load magnitude according to the magnitude of the load detected by the load sensor 11. For example, if no load is detected, it is not lit. Lights up in blue when the load is about one-third of the load that may cause damage to the chain block 20. Lights up yellow when the load is about 1/3 to 2/3 of the dangerous load. Lights red when more than two-thirds of dangerous loads. Flashes red when a dangerous load is exceeded. Note that the magnitude of the set load and the light emission state corresponding to it can be changed as necessary.

更に、荷重センサ１１により検知された荷重の大きさはＲＦＩＤタグ１０のメモリ部１３に一時的に記憶される。記憶された荷重の大きさは、メモリ部１３に予め記憶されているＲＦＩＤタグ１０を識別する為の識別ＩＤと共に、送受信部１４より送信される。送信された荷重の大きさと識別ＩＤは外部送受信装置１６で受信され、受信した荷重の大きさがどのＲＦＩＤタグ１０より送られてきたものかを識別ＩＤによって識別することが可能となる。   Further, the magnitude of the load detected by the load sensor 11 is temporarily stored in the memory unit 13 of the RFID tag 10. The magnitude of the stored load is transmitted from the transmission / reception unit 14 together with the identification ID for identifying the RFID tag 10 stored in the memory unit 13 in advance. The transmitted load magnitude and identification ID are received by the external transmission / reception device 16, and the RFID tag 10 from which the received load magnitude is sent can be identified by the identification ID.

また、ＲＦＩＤタグ１０より発信される識別ＩＤの信号を外部送受信装置１６の３ヶ所以上のアンテナで受信することにより、ＲＦＩＤタグ１０の位置を計測する。これにより、該ＲＦＩＤタグ１０が取り付けられたチェーンブロック２０の位置を確認することができる。   The position of the RFID tag 10 is measured by receiving identification ID signals transmitted from the RFID tag 10 at three or more antennas of the external transmission / reception device 16. Thereby, the position of the chain block 20 to which the RFID tag 10 is attached can be confirmed.

確認された位置は外部送受信装置１６に表示され、チェーンブロック２０を実際に目視で確認する必要が発生した場合は、外部送受信装置１６からの指令により該チェーンブロック２０に取り付けられたＲＦＩＤタグ１０の発光部１２を通常とは異なる発光状態として目視での確認を容易にする。   The confirmed position is displayed on the external transmission / reception device 16, and when it is necessary to visually check the chain block 20, the RFID tag 10 attached to the chain block 20 is instructed by a command from the external transmission / reception device 16. Visual confirmation is facilitated by setting the light emitting unit 12 to a light emitting state different from normal.

これらの作用により、本発明の荷重センサ付きＲＦＩＤタグは、揚重機にかかる荷重の大きさを外部送受信装置１６で一括に確認することや、危険な荷重に達している揚重機を離れた場所から目視で確認することが可能となり、作業環境をより安全にすることができる。また、ＲＦＩＤタグ１０から送信される信号を外部送受信装置１６で受信することにより、信号を送信するＲＦＩＤタグ１０が取り付けられた揚重機の位置を知ることも可能となる。   By these actions, the RFID tag with a load sensor of the present invention can confirm the magnitude of the load applied to the lifting machine at once with the external transmission / reception device 16 or from a place away from the lifting machine that has reached a dangerous load. It becomes possible to confirm visually, and the working environment can be made safer. In addition, by receiving a signal transmitted from the RFID tag 10 by the external transmission / reception device 16, it is also possible to know the position of the lifting machine to which the RFID tag 10 that transmits the signal is attached.

本発明に係る荷重センサ付きＲＦＩＤタグの構成模式図。The structure schematic diagram of the RFID tag with a load sensor according to the present invention. 荷重センサ付きＲＦＩＤタグのチェーンブロックへの取り付け例を表した図。The figure showing the example of attachment to the chain block of the RFID tag with a load sensor. 荷重センサ付きＲＦＩＤタグを使用したチェーンブロックでの吊り上げ作業を表した図。The figure showing the lifting work in the chain block using the RFID tag with a load sensor.

符号の説明Explanation of symbols

１０…ＲＦＩＤタグ，１１…荷重センサ，１２…発光部，１３…メモリ部，１４…送受信部，１５…電源部，１６…外部送受信装置，２０…揚重機(チェーンブロック) ，２１…フック，２２…ブロック，２３…チェーン，３０…配管資材 DESCRIPTION OF SYMBOLS 10 ... RFID tag, 11 ... Load sensor, 12 ... Light emission part, 13 ... Memory part, 14 ... Transmission / reception part, 15 ... Power supply part, 16 ... External transmission / reception apparatus, 20 ... Lifting machine (chain block), 21 ... Hook, 22 ... Block, 23 ... Chain, 30 ... Piping material

Claims (3)

荷重の大きさを検知する荷重センサと、
前記荷重センサからの信号により発光状態が変化する発光部と、
前記荷重センサと前記発光部とへ電力を供給する電源部と、を備えたことを特徴とする荷重センサ付きＲＦＩＤタグ。 A load sensor for detecting the magnitude of the load;
A light emitting unit whose light emitting state changes according to a signal from the load sensor;
An RFID tag with a load sensor, comprising: a power supply unit that supplies power to the load sensor and the light emitting unit. 前記荷重センサは、歪ゲージであることを特徴とする請求項１に記載の荷重センサ付きＲＦＩＤタグ。   The RFID tag with a load sensor according to claim 1, wherein the load sensor is a strain gauge. 前記荷重センサ付きＲＦＩＤタグは、配管資材の仮吊りに使用されるチェーンブロックに取り付けられ、前記チェーンブロックに掛かる荷重を検知することを特徴とする請求項１又は２に記載の荷重センサ付きＲＦＩＤタグ。   The RFID tag with a load sensor according to claim 1 or 2, wherein the RFID tag with a load sensor is attached to a chain block used for temporarily suspending piping materials and detects a load applied to the chain block. .
JP2005064440A 2005-03-08 2005-03-08 Rfid tag with load sensor Pending JP2006250582A (en)

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US8632509B2 (en) 2006-09-29 2014-01-21 Novo Nordisk A/S Injection device with electronic detecting means
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