JPH06325284A - Radio communication method in flow rate meter - Google Patents
Radio communication method in flow rate meterInfo
- Publication number
- JPH06325284A JPH06325284A JP5110739A JP11073993A JPH06325284A JP H06325284 A JPH06325284 A JP H06325284A JP 5110739 A JP5110739 A JP 5110739A JP 11073993 A JP11073993 A JP 11073993A JP H06325284 A JPH06325284 A JP H06325284A
- Authority
- JP
- Japan
- Prior art keywords
- station
- slave station
- master station
- slave
- master
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y02B60/50—
Landscapes
- Details Of Flowmeters (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、ガス、電気、水道等
の流量を測定する流量計における無線通信方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication method in a flow meter for measuring the flow rate of gas, electricity, water, etc.
【０００２】[0002]
【従来の技術】例えば、ガス等の流量計において、流量
計本体からなる子局と、該子局との間でデータ送受を行
う親局とを備え、両局間で無線通信を行うことにより、
子局の作動を無線遠隔操作により制御したり、子局で検
針した流量データを親局に送って隔離検針を行ったりす
る無線通信システムが一部で実用化されている。2. Description of the Related Art For example, in a flow meter for gas or the like, a slave station including a flow meter main body and a master station for transmitting and receiving data to and from the slave station are provided, and wireless communication is performed between the two stations. ,
Some wireless communication systems have been put into practical use in which the operation of a slave station is controlled by wireless remote control, and the flow rate data detected by the slave station is sent to the master station to perform isolated meter reading.
【０００３】かかる親局と子局との無線通信は、データ
を送信する側の局が相手局に対して呼出し情報を発信す
ることにより開始されるが、データの送受を行うために
は相手局が他局から発信される呼出し情報を受信するこ
とがまず必要である。The wireless communication between the master station and the slave station is started by the station transmitting data transmitting call information to the partner station. In order to transmit and receive data, the partner station First, it is necessary for the mobile terminal to receive call information transmitted from other stations.
【０００４】このため、従来では、呼出しを受ける局
は、呼出し情報を受信すべく常時受信動作状態で待機し
ていた。For this reason, conventionally, a station receiving a call has always waited in a receiving operation state to receive the call information.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、受信動
作を常時継続させるのは電力消費が大きく、特に、親
局、子局の動作電源を電池により構成した場合には電池
寿命が短くなり、電池消耗による誤作動を生じたり、短
期間のうちに作動不能に陥るという欠点があった。また
頻繁な電池交換はその煩に絶えないものでもあった。殊
に、子局はその設置場所の関係上外部電源の使用が容易
でないことから、電力消費の問題は、上記無線通信シス
テムの普及を阻む一大要因となるものであった。However, the continuous operation of the receiving operation consumes a large amount of power, and especially when the operating power source of the master station and the slave station is composed of a battery, the battery life becomes short and the battery is consumed. However, there are drawbacks such as a malfunction caused by the operation and a malfunction in a short period of time. In addition, frequent battery replacement has been a nuisance. In particular, since the slave station is not easy to use an external power source due to its installation location, the problem of power consumption has been a major factor preventing the spread of the wireless communication system.
【０００６】この発明は、かかる技術的背景に鑑みてな
されたものであって、省電力化を可能とした流量計にお
ける無線通信方法の提供を目的とする。The present invention has been made in view of the above technical background, and an object of the present invention is to provide a wireless communication method in a flow meter capable of power saving.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、この発明は、相手局から発信される呼出し情報を受
信するための受信動作を、常時継続的に行うのではな
く、間欠的に行わせようというものである。In order to achieve the above object, the present invention intermittently does not always continuously perform a receiving operation for receiving calling information transmitted from a partner station. It is to let it be done.
【０００８】即ち、この発明は、流量計本体からなる子
局（２）と、該子局との間でデータ送受を行う親局
（１）とを備え、子局（２）または親局（１）のうちの
いずれか一方から他方へ呼出し情報を発信し、他方の局
でこれを受信したのち両局間でデータ送受を行う流量計
における無線通信方法であって、前記呼出し情報を受信
するまでの受信動作を間欠的に行うことを特徴とする流
量計における無線通信方法を要旨とする。That is, the present invention comprises a slave station (2) composed of a flowmeter main body and a master station (1) for transmitting and receiving data to and from the slave station, and the slave station (2) or the master station ( A method for wireless communication in a flowmeter, wherein call information is transmitted from any one of 1) to the other, and the other station receives the call information, and then data is transmitted and received between the two stations, and the call information is received. The gist is a wireless communication method in a flow meter, which is characterized in that the reception operation up to is performed intermittently.
【０００９】ここに、一方の局の呼出し情報を間欠的受
信動作状態にある他方の局で確実に受信させるため、望
ましくは、一方の局での呼出し情報の発信動作を、他方
の局の間欠的受信動作の少なくとも一周期にわたって継
続するのが良い。この場合、親局（１）と子局（２）の
間欠的受信動作の周期を異なるものとすることも推奨さ
れる。また、親局（１）と子局（２）の送信周波数を異
なるものとしても良い。In order to ensure that the call information of one station is received by the other station in the intermittent receiving operation state, it is desirable that the call information transmission operation of one station be intermittently performed by the other station. It is preferable to continue for at least one cycle of the selective reception operation. In this case, it is also recommended that the master station (1) and the slave station (2) have different intermittent reception operation cycles. Further, the transmission frequencies of the master station (1) and the slave station (2) may be different.
【００１０】[0010]
【作用】親局（１）と子局（２）との間において、呼出
し情報を受信するまでの受信動作を間欠的に行うから、
呼出し情報を受信するために受信動作を常時継続して行
う場合に較べて、飛躍的な省電力化が図られる。Since the reception operation until the call information is received is intermittently performed between the master station (1) and the slave station (2),
Compared with the case where the receiving operation is always continuously performed to receive the call information, a dramatic power saving is achieved.
【００１１】また、一方の局の呼出し情報の発信動作
を、相手局の間欠的受信動作の少なくとも一周期にわた
って継続した場合には、一方の局の発信期間と相手局の
受信期間が必ず重複するから、相手局は確実に呼出し情
報を受信することができ、益々安定した動作を行わせる
ことができる。この場合、親局の間欠的受信動作の周期
と子局の間欠的受信動作の周期とを異なるものとするこ
とにより、親局または子局の発信動作の継続時間を短く
することができ、益々消費電力が少なくなる。When the calling information transmission operation of one station is continued for at least one cycle of the intermittent reception operation of the partner station, the originating period of the one station and the receiving period of the partner station always overlap. Therefore, the partner station can surely receive the call information and can perform more stable operation. In this case, by making the cycle of the intermittent reception operation of the master station different from the cycle of the intermittent reception operation of the slave station, the duration of the transmission operation of the master station or the slave station can be shortened, and more and more. It consumes less power.
【００１２】さらに、親局と子局の送信周波数を異なる
ものとした場合には、隣接する親局どうし、子局どうし
の混信が防止される。Furthermore, when the transmission frequencies of the master station and the slave stations are different, interference between adjacent master stations and slave stations is prevented.
【００１３】[0013]
【実施例】次にこの発明の一実施例を、図１及び図２を
参照しつつ説明する。この実施例は、ガスメータの無線
通信システムを示すものであり、親局及び子局のいずれ
もが呼出し情報の発信及び受信を行う場合を示してい
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to FIGS. This embodiment shows a wireless communication system of a gas meter, and shows a case where both a master station and a slave station send and receive call information.
【００１４】図１はこの発明を実施するための装置を示
すブロック図であり、左側が親局（１）を、右側が子局
（２）を示している。FIG. 1 is a block diagram showing an apparatus for carrying out the present invention. The left side shows a master station (1) and the right side shows a slave station (2).
【００１５】前記親局（１）は、ＮＣＵ（網制御装置）
（３）に組み込まれ、あるいはＮＣＵに装着されてなる
ものであり、電話回線（４）を通じて指令センター（図
示せず）に接続されている。この親局（１）は、子局
（２）との間で無線通信を行うための公知構成の送信機
（11）、受信機（12）、アンテナ（13）を備え、さらに
処理回路（14）を備えている。この処理回路（14）は、
電話回線（４）を通じて送られてきた指令セーターから
の指令に基いて送受信機（11）（12）を制御したり、子
局（２）から送られてきた検針データ等を処理して指令
センターに送る等の動作を行うものであり、ＣＰＵを含
むマイクロコンピュータシステムを備えている。なお、
図１に示す（15）は、処理回路（14）からの信号に基い
て、送信機（11）または受信機（12）とアンテナ（13）
との接続を切替える送受信切替回路である。The master station (1) is an NCU (network control unit).
It is built in (3) or attached to the NCU, and is connected to a command center (not shown) through a telephone line (4). The master station (1) includes a transmitter (11), a receiver (12), and an antenna (13) having a known configuration for performing wireless communication with the slave station (2), and further includes a processing circuit (14). ) Is provided. This processing circuit (14)
The command center controls the transceivers (11) (12) based on the command from the command sweater sent through the telephone line (4) and processes the meter reading data sent from the slave station (2). And the like, and is provided with a microcomputer system including a CPU. In addition,
Reference numeral (15) shown in FIG. 1 is based on a signal from the processing circuit (14) and is based on a signal from the transmitter (11) or the receiver (12) and the antenna (13).
It is a transmission / reception switching circuit for switching the connection with.
【００１６】一方、子局（２）はガスメータ本体からな
るものであり、従来からガスメータに設けられている例
えば膜式あるいはフルイディック式等の流量測定装置
（20）を備えている。さらに子局（２）は、親局（１）
との間で無線通信を行うための送信機（21）、受信機
（22）、アンテナ（23）を備えるとともに、親局と同じ
く処理回路（24）を備えている。この処理回路（24）
は、親局（１）からの指令に基き、例えば図示しない弁
等を駆動してガスを緊急遮断させたり、遮断解除させた
り、あるいは流量測定装置（20）により測定された検針
データを親局（１）に送信処理するものであり、親局の
場合と同じくＣＰＵを含むマイクロコンピュータシステ
ムを備えている。なお、（25）は処理回路（24）からの
信号に基いて、送信機（21）または受信機（22）とアン
テナ（23）との接続を切替える送受信切替回路である。On the other hand, the slave station (2) is composed of a gas meter main body and is provided with a flow rate measuring device (20) of a membrane type or a fluidic type, which is conventionally provided in the gas meter. Furthermore, the slave station (2) is the master station (1)
It is provided with a transmitter (21), a receiver (22), an antenna (23) for performing wireless communication with and, and also with a processing circuit (24) similar to the master station. This processing circuit (24)
On the basis of a command from the master station (1), for example, by driving a valve or the like (not shown) to urgently shut off or release the gas, or the meter reading data measured by the flow rate measuring device (20) is used as the master station. The transmission processing is performed in (1), and the microcomputer system including the CPU is provided as in the case of the master station. Reference numeral (25) is a transmission / reception switching circuit that switches the connection between the transmitter (21) or the receiver (22) and the antenna (23) based on the signal from the processing circuit (24).
【００１７】図１に示した親局（１）及び子局（２）を
用いての無線通信方法を、図２のタイミング図を参照し
つつ説明する。A radio communication method using the master station (1) and the slave station (2) shown in FIG. 1 will be described with reference to the timing chart of FIG.
【００１８】親局（１）及び子局（２）は、常時はいず
れも各受信機（12）（22）が各アンテナ（13）（23）及
び処理回路（14）（24）に接続されて受信モードとなっ
ており、それぞれ間欠的受信動作を行っている。即ち、
図２にパルス波形で示すように、親局（１）では受信機
（12）がＴ1 の時間作動した後、Ｔ2 の時間作動を停止
し、Ｔ3 ＝Ｔ1 ＋Ｔ2 の周期でこれを繰り返す。一方、
子局（２）では受信機（22）がＴ4 の時間作動した後、
Ｔ5 の時間作動を停止し、Ｔ6 ＝Ｔ4 ＋Ｔ5 の周期でこ
れを繰り返す。この実施例では、Ｔ1 ＝３０ｍｓ、Ｔ2
＝１０ｓ、Ｔ4＝３０ｍｓ、Ｔ5 ＝３０ｓに設定されて
おり、従ってＴ3 ＜Ｔ6 に設定されている。In the master station (1) and the slave station (2), the receivers (12) and (22) are always connected to the antennas (13) and (23) and the processing circuits (14) and (24). Are in the reception mode, and the intermittent reception operation is performed in each. That is,
As shown by the pulse waveform in FIG. 2, in the master station (1), after the receiver (12) operates for the time T1, the operation for the time T2 is stopped, and this is repeated in the cycle of T3 = T1 + T2. on the other hand,
In the slave station (2), after the receiver (22) has been operating for T4,
The operation for the time T5 is stopped, and this is repeated in the cycle of T6 = T4 + T5. In this embodiment, T1 = 30 ms, T2
= 10 s, T4 = 30 ms, T5 = 30 s, and therefore T3 <T6.
【００１９】次に、指令センターからの指令により、親
局（１）が例えばガス遮断情報を子局（２）に向けて送
信しようとする場合、親局（１）では処理回路（14）か
らの信号により送受信切替回路（13）が切替わって、送
信機（11）とアンテナ（13）及び処理回路（14）が接続
され、送信モードになる。Next, in response to a command from the command center, when the master station (1) tries to transmit gas cutoff information to the slave station (2), for example, the master station (1) outputs from the processing circuit (14). The signal is sent to switch the transmission / reception switching circuit (13), the transmitter (11) is connected to the antenna (13) and the processing circuit (14), and the transmission mode is set.
【００２０】次いで、親局（１）は、対応子局（２）に
対する呼出し情報としてのＩＤコードを、所定の送信周
波数をもって連続的に発信する。ＩＤコードの発信時間
Ｔ7は子局（２）の間欠的受信動作の一周期Ｔ6 以上、
即ちＴ7 ≧Ｔ6 となるように確保するのが望ましい。こ
うすることで、親局（１）の発信期間と子局（２）の受
信期間が必ず重複し、親局（１）からのＩＤコードを子
局（２）に確実に受信させることができる。この実施例
では、Ｔ7 ＝Ｔ6 ＋ＩＤコード１個分の時間に設定して
いる。Next, the master station (1) continuously transmits an ID code as call information for the corresponding slave station (2) at a predetermined transmission frequency. The transmission time T7 of the ID code is equal to or longer than one cycle T6 of the intermittent receiving operation of the slave station (2),
That is, it is desirable to ensure that T7 ≥ T6. By doing so, the transmission period of the master station (1) and the reception period of the slave station (2) are always overlapped, and the slave station (2) can be surely made to receive the ID code from the master station (1). . In this embodiment, the time is set to T7 = T6 + one ID code.
【００２１】一方、子局（２）は、間欠的受信動作中に
親局（１）からのＩＤコードを受信すると、このＩＤコ
ードが自己のＩＤコードと一致するか否かを処理回路
（24）により判定し、一致した場合には親局（１）から
の発信が終了するまで受信状態を継続する。なお、処理
回路（24）のＣＰＵはＩＤコードの一致を確認した時点
で非動作状態となる。一方、ＩＤコードが一致しない場
合には受信動作を中止する。On the other hand, when the slave station (2) receives the ID code from the master station (1) during the intermittent receiving operation, the processing circuit (24) determines whether this ID code matches its own ID code. ), And if they match, the reception state is continued until the transmission from the master station (1) ends. The CPU of the processing circuit (24) becomes inactive at the time when it is confirmed that the ID codes match. On the other hand, if the ID codes do not match, the reception operation is stopped.
【００２２】ＩＤコードが一致した場合には、子局
（２）は親局（１）からの発信動作が終了したのち、直
ちに送信モードに切り替わり、親局（１）の送信周波数
とは異なる送信周波数で、呼出しに対する回答信号を親
局（１）に向けて送信する。一方、親局（１）は発信動
作終了後直ちに受信モードに切替わり、子局（２）から
の上記回答信号を受信したのち、両局間でデータの送受
が行われる。即ち、親局（１）は送信モードに、子局
（２）は受信モードにそれぞれ再度切替わり、親局
（１）からのガス遮断等に関する情報が子局（２）に向
けて送信され、該情報を受け取った子局（２）は、情報
内容に従い弁を閉じガス遮断を行う。When the ID codes match, the slave station (2) immediately switches to the transmission mode after the transmission operation from the master station (1) is completed, and the transmission frequency different from that of the master station (1) is transmitted. A response signal to the call is transmitted to the master station (1) at the frequency. On the other hand, the master station (1) is switched to the reception mode immediately after the completion of the transmission operation, and after receiving the reply signal from the slave station (2), data is transmitted and received between the two stations. That is, the master station (1) is switched to the transmission mode and the slave station (2) is switched to the reception mode again, and the information about the gas cutoff from the master station (1) is transmitted to the slave station (2). The slave station (2) receiving the information closes the valve and shuts off the gas according to the information content.
【００２３】親局（１）と子局（２）との間でのデータ
送受の終了後、親局、子局は当初の間欠的受信動作に戻
り、相手局からの呼出しを待つ。After the data transmission / reception between the master station (1) and the slave station (2) is completed, the master station and the slave station return to the initial intermittent receiving operation and wait for a call from the partner station.
【００２４】また、子局（２）から親局（１）へ検針デ
ータ等の情報を送信する場合は、上記と逆の手順で行わ
れる。即ち、親局（１）の間欠的受信動作の少なくとも
一周期Ｔ3 以上の時間に亘って、子局（２）から親局
（１）に向けて親局を特定するためのＩＤコードを連続
的に送信し、該ＩＤコードを受領した親局（１）は回答
信号を子局（２）に向けて送信した後、子局（２）から
親局（１）へのデータ送受が行われる。When transmitting information such as meter reading data from the slave station (2) to the master station (1), the procedure is reversed. That is, the ID code for identifying the master station is continuously transmitted from the slave station (2) to the master station (1) over at least one cycle T3 of the intermittent reception operation of the master station (1). After receiving the ID code, the master station (1) transmits a reply signal to the slave station (2), and then the slave station (2) transmits / receives data to / from the master station (1).
【００２５】なお、以上の動作では、親局（１）の間欠
的受信動作の周期Ｔ3 と子局（２）の間欠的受信動作の
周期Ｔ6 とを異なるものに設定したが、同一の周期に設
定しても良い。しかしながら、異なる周期に設定した方
が一方の発信動作時間を短くできる点で望ましい。例え
ば、上記実施例のように、親局（１）の間欠的受信動作
の周期Ｔ3 と子局（２）の間欠的受信動作の周期Ｔ6 と
をＴ3 ＜Ｔ6 に設定することにより、子局（２）からの
発信動作の継続時間を短くできることになり、子局
（２）の電力消費を低減することができる。これは親局
側の電源として外部電源を利用できる場合に特に有効と
なる。In the above operation, the cycle T3 of the intermittent receiving operation of the master station (1) and the cycle T6 of the intermittent receiving operation of the slave station (2) are set to different values, but the same cycle is set. You may set it. However, it is desirable to set different cycles because one of the transmission operation times can be shortened. For example, as in the above embodiment, by setting the cycle T3 of the intermittent receiving operation of the master station (1) and the cycle T6 of the intermittent receiving operation of the slave station (2) to T3 <T6, the slave station ( The duration of the transmission operation from 2) can be shortened, and the power consumption of the slave station (2) can be reduced. This is especially effective when an external power supply can be used as the power supply on the master station side.
【００２６】また、親局（１）の送信周波数と子局
（２）の送信周波数を異なるものとしたが、同一周波数
であっても良い。しかしながら、異なる送信周波数とし
た方が、親局（１）は近隣に存在する他の親局の呼出し
情報を受信する危険がなく、子局（２）は他の子局から
の呼出し情報を受信する危険がなく、従って混信による
誤動作を防止し得る点で推奨される。Although the transmission frequency of the master station (1) and the transmission frequency of the slave station (2) are different, they may be the same frequency. However, if the transmission frequency is different, the master station (1) does not risk receiving the call information of other master stations existing in the vicinity, and the slave station (2) receives the call information from other slave stations. It is recommended that there is no danger of malfunction, and therefore malfunction due to interference can be prevented.
【００２７】また、親局（１）、子局（２）いずれの側
からも相手局に対してデータを送信する場合を示した
が、一方の局からのみデータを送信するものとしても良
いことは勿論である。Although the case where data is transmitted to the partner station from either side of the master station (1) and the slave station (2) is shown, data may be transmitted from only one station. Of course.
【００２８】[0028]
【発明の効果】この発明は、上述の次第で、親局と子局
との間において、呼出し情報を受信するまでの受信動作
を間欠的に行うから、呼出し情報を受信するために受信
動作を常時継続状態で行っていた従来方法に較べて、飛
躍的な省電力化を図り得る。その結果、電源として電池
を用いた場合にも、電池寿命を驚異的に伸ばすことがで
き、ひいては長期間に亘り安定動作を行うことのできる
流量計の無線通信システムの提供が可能となる。As described above, according to the present invention, the receiving operation is intermittently performed between the master station and the slave station until the calling information is received. Therefore, the receiving operation is performed to receive the calling information. Compared with the conventional method that was always performed continuously, it is possible to achieve dramatic power savings. As a result, even when a battery is used as a power source, it is possible to provide a wireless communication system of a flow meter that can extend battery life surprisingly and can perform stable operation for a long period of time.
【００２９】また、一方の局からの呼出し情報の発信動
作を、相手局の間欠的受信動作の少なくとも一周期にわ
たって継続した場合には、一方の局の発信期間と相手局
の受信期間が必ず重複するから、相手局は確実に呼出し
情報を受信することができ、益々安定した動作を行わせ
ることができる。この場合、親局の間欠的受信動作の周
期と子局の間欠的受信動作の周期とを異なるものとする
ことにより、親局または子局の発信動作の継続時間を短
くすることができ、益々消費電力を少なくできる効果が
ある。Further, when the calling information transmission operation from one station is continued for at least one cycle of the intermittent reception operation of the other station, the transmission period of the one station and the reception period of the other station always overlap. Therefore, the partner station can surely receive the call information and can perform more stable operation. In this case, by making the cycle of the intermittent reception operation of the master station different from the cycle of the intermittent reception operation of the slave station, the duration of the transmission operation of the master station or the slave station can be shortened, and more and more. This has the effect of reducing power consumption.
【００３０】さらに、親局と子局の送信周波数を異なる
ものとした場合には、隣接する親局どうし、子局どうし
の混信を防止することができ、より一層の安定動作を行
わせることができる。Further, when the transmission frequencies of the master station and the slave stations are different, it is possible to prevent the interference between the adjacent master stations and the slave stations and to perform a more stable operation. it can.
【図１】この発明を実施するための親局、子局の構成例
を示すブロック図である。FIG. 1 is a block diagram showing a configuration example of a master station and a slave station for implementing the present invention.
【図２】図１の装置を用いて無線通信を行う場合の親
局、子局の送受信動作のタイミング図の一例である。FIG. 2 is an example of a timing chart of transmission / reception operations of a master station and a slave station when wireless communication is performed using the apparatus of FIG.
１…親局 ２…子局 1 ... Parent station 2 ... Child station
Claims (4)
局との間でデータ送受を行う親局（１）とを備え、子局
（２）または親局（１）のうちのいずれか一方から他方
へ呼出し情報を発信し、他方の局でこれを受信したのち
両局間でデータ送受を行う流量計における無線通信方法
であって、 前記呼出し情報を受信するまでの受信動作を間欠的に行
うことを特徴とする流量計における無線通信方法。1. A slave station (2) comprising a flowmeter main body and a master station (1) for transmitting and receiving data to and from the slave station, the slave station (2) or the master station (1) A wireless communication method in a flowmeter in which call information is transmitted from one of the stations to the other, and the other station receives the call information, and then transmits and receives data between the two stations, which is a receiving operation until the call information is received. A wireless communication method in a flow meter, which is characterized by performing intermittently.
方の局の間欠的受信動作の少なくとも一周期にわたって
継続する請求項１に記載の流量計における無線通信方
法。2. The wireless communication method for a flow meter according to claim 1, wherein the calling information transmission operation of one station is continued for at least one cycle of the intermittent reception operation of the other station.
作の周期を異なるものとした請求項２に記載の流量計に
おける無線通信方法。3. The wireless communication method for a flow meter according to claim 2, wherein the master station (1) and the slave station (2) have different intermittent receiving operation cycles.
異なるものとした請求項１ないし３のいずれか１に記載
の流量計における無線通信方法。4. The wireless communication method for a flowmeter according to claim 1, wherein the master station (1) and the slave station (2) have different transmission frequencies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5110739A JPH06325284A (en) | 1993-05-12 | 1993-05-12 | Radio communication method in flow rate meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5110739A JPH06325284A (en) | 1993-05-12 | 1993-05-12 | Radio communication method in flow rate meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06325284A true JPH06325284A (en) | 1994-11-25 |
Family
ID=14543302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5110739A Pending JPH06325284A (en) | 1993-05-12 | 1993-05-12 | Radio communication method in flow rate meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06325284A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006085680A (en) * | 2004-08-18 | 2006-03-30 | Ube Ind Ltd | Wireless measuring device |
| WO2015156031A1 (en) * | 2014-04-11 | 2015-10-15 | ローム株式会社 | Communication terminal and wireless sensor network system |
-
1993
- 1993-05-12 JP JP5110739A patent/JPH06325284A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006085680A (en) * | 2004-08-18 | 2006-03-30 | Ube Ind Ltd | Wireless measuring device |
| WO2015156031A1 (en) * | 2014-04-11 | 2015-10-15 | ローム株式会社 | Communication terminal and wireless sensor network system |
| JP2015203926A (en) * | 2014-04-11 | 2015-11-16 | ローム株式会社 | Communication terminal and radio sensor network system |
| CN106415685A (en) * | 2014-04-11 | 2017-02-15 | 罗姆股份有限公司 | Communication terminal and wireless sensor network system |
| EP3131078A4 (en) * | 2014-04-11 | 2018-03-07 | Rohm Co., Ltd. | Communication terminal and wireless sensor network system |
| CN106415685B (en) * | 2014-04-11 | 2019-07-16 | 罗姆股份有限公司 | Communication terminal and wireless sensor network system |
| US10601528B2 (en) | 2014-04-11 | 2020-03-24 | Rohm Co., Ltd. | Communication terminal and wireless sensor network system |
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