JPH11132823A - Gas meter - Google Patents
Gas meterInfo
- Publication number
- JPH11132823A JPH11132823A JP29439897A JP29439897A JPH11132823A JP H11132823 A JPH11132823 A JP H11132823A JP 29439897 A JP29439897 A JP 29439897A JP 29439897 A JP29439897 A JP 29439897A JP H11132823 A JPH11132823 A JP H11132823A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- shock
- value
- earthquake
- microcomputer
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、膜式のガスメータ
に関し、詳しくは、地震信号や衝撃信号を検出して自動
的に遮断弁を閉じるようにした地震センサ内蔵型のガス
メータに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas meter of a membrane type, and more particularly to a gas meter with a built-in seismic sensor which detects a seismic signal or an impact signal and automatically closes a shutoff valve.
【０００２】[0002]
【従来の技術】図２に従来の地震センサ内蔵型のガスメ
ータの論理回路図を示しており、ガスメータに地震の振
動加速度が加わったとき、地震センサ１はこの振動加速
度をＯＮ−ＯＦＦ信号として膜式ガスメータのマイコン
部４に出力する。マイコン部４に入力された信号は、マ
イコン部４で地震と判断したとき、ガスメータの遮断弁
５に弁閉の信号を出力し、これによって遮断弁５を遮断
してガスの流れを止めるようになっている。2. Description of the Related Art FIG. 2 shows a logic circuit diagram of a conventional gas meter with a built-in earthquake sensor. When a vibration acceleration of an earthquake is applied to the gas meter, the earthquake sensor 1 uses the vibration acceleration as an ON-OFF signal. It is output to the microcomputer unit 4 of the gas meter. When a signal input to the microcomputer unit 4 determines that an earthquake has occurred, the microcomputer unit 4 outputs a signal for closing the valve to the shutoff valve 5 of the gas meter, thereby shutting off the shutoff valve 5 and stopping the flow of gas. Has become.
【０００３】[0003]
【発明が解決しようとする課題】上記の方式では、地震
センサ１により地震振動をＯＮ−ＯＦＦ信号で認識して
いるだけで、振動の大きさについては検出できないし、
記録もしない。したがって、地震以外の例えば輸送中や
施工中の落下等による衝撃も大きさは感知できないし、
記録もしない。一般にガスメータは、輸送や施工中に衝
撃にあったものは、安全上使用不能にする必要がある
が、従来は衝撃値の大きさを検出できないため、必要以
上に使用不能と判定することが多かった。In the above-mentioned method, the magnitude of the vibration cannot be detected only by recognizing the seismic vibration by the seismic sensor 1 with the ON-OFF signal.
Do not record. Therefore, the magnitude of impacts other than earthquakes such as dropping during transportation or construction cannot be sensed,
Do not record. Generally, gas meters that have been impacted during transportation or construction must be disabled for safety reasons.However, since the magnitude of the impact value cannot be detected conventionally, it is often determined that the gas meter is unusable. Was.
【０００４】また、従来の地震センサ１は、水平方向の
揺れは感知しやすいが、縦揺れに対しては不適格であ
り、また、ガスメータの取付姿勢によっても影響されや
すく、検出精度があまりよくないという問題がある。[0004] The conventional earthquake sensor 1 is easy to detect horizontal shaking, but is unsuitable for vertical shaking, and is easily affected by the mounting posture of the gas meter, so that the detection accuracy is very poor. There is no problem.
【０００５】本発明は上述の点に着目してなされたもの
で、地震信号のみならずそれ以外の衝撃信号も大きさま
で正確に検出でき、検出精度が高く、安全性に優れたガ
スメータを提供することを目的とする。The present invention has been made in view of the above points, and provides a gas meter which can accurately detect not only an earthquake signal but also other shock signals up to a magnitude, has high detection accuracy, and is excellent in safety. The purpose is to:
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するた
め、請求項１記載の発明は、振動を検出する地震センサ
が内蔵され、該地震センサからの信号に基づいて遮断弁
を作動させてガスの流れを遮断するようにしたガスメー
タであって、前記地震センサとしてＸ軸、Ｙ軸、Ｚ軸よ
り出力されている加速度信号の絶対値を電圧値に変換し
て出力する３軸加速度センサを使用し、前記電圧値を電
圧判定回路に入力して地震信号か地震以外の衝撃信号か
を判断し、地震信号であればそのガル値を衝撃判別回路
で計算してその値をマイコン部に記憶すると共に、前記
ガル値が規定値以上のときは、前記マイコン部からの信
号に基づいて前記遮断弁を閉じるようにし、衝撃信号で
あればその衝撃値を前記衝撃判別回路で計算してその値
を前記マイコン部に記憶すると共に前記衝撃値が規定値
以上のときは前記マイコン部からの信号に基づいて衝撃
を受けたことをディスプレイに警告表示するようにした
ことを特徴とするものである。In order to achieve the above object, the invention according to claim 1 includes a built-in seismic sensor for detecting vibration, and operates a shut-off valve based on a signal from the seismic sensor to operate the gas. A three-axis acceleration sensor that converts an absolute value of an acceleration signal output from an X-axis, a Y-axis, and a Z-axis into a voltage value and outputs the voltage value as the earthquake sensor. Then, the voltage value is input to a voltage determination circuit to determine whether the signal is an earthquake signal or a shock signal other than an earthquake. If the signal is an earthquake signal, the galvanic value is calculated by the shock determination circuit and the value is stored in the microcomputer unit. At the same time, when the galling value is equal to or more than a specified value, the shutoff valve is closed based on a signal from the microcomputer unit, and if it is a shock signal, the shock value is calculated by the shock determination circuit and the value is calculated. In the microcomputer section Is the impact value when the specified value or greater while 憶 is characterized in that it has to be warning that impacted on the basis of a signal from the microcomputer unit on the display.
【０００７】このため、請求項１記載の発明では、３軸
加速度センサが地震の揺れ、あるいは落下等による衝撃
を受けると、３軸加速度センサからその大きさに対応し
た電圧値が電圧判定回路に送られ、電圧判定回路では、
地震による揺れと衝撃とを判別し、地震による揺れと判
定したときは衝撃判別回路に送られてガル値を計算し、
ガル値が規定値以上の場合マイコン部からの信号でガス
メータの遮断弁を閉じる。For this reason, according to the first aspect of the present invention, when the three-axis acceleration sensor receives an impact due to a shaking or a fall of an earthquake, a voltage value corresponding to the magnitude is sent from the three-axis acceleration sensor to the voltage determination circuit. Sent to the voltage judgment circuit.
It discriminates between shaking and impact due to an earthquake, and when it is determined to be shaking due to an earthquake, it is sent to an impact discriminating circuit to calculate a gal value,
When the gull value is equal to or greater than the specified value, the shutoff valve of the gas meter is closed by a signal from the microcomputer unit.
【０００８】地震以外の衝撃信号が３軸加速度センサに
加わった場合は、電圧値の変化に基づいて電圧判定回路
が衝撃信号と判断し、衝撃判別回路で計算した衝撃値を
マイコン部に記憶すると共に、規定値以上の衝撃値の場
合にはディスプレイに警告表示する。When a shock signal other than an earthquake is applied to the three-axis acceleration sensor, the voltage judgment circuit judges the shock signal based on a change in the voltage value, and stores the shock value calculated by the shock judgment circuit in the microcomputer. In addition, a warning is displayed on the display when the impact value is equal to or more than the specified value.
【０００９】３軸加速度センサを使用したことにより、
横揺れ、縦揺れの関係なく地震の揺れを正確にとらえる
ことができ、また、揺れの大きさ、方向も検出でき、安
全性の高いガスメータが得られる。By using a three-axis acceleration sensor,
It is possible to accurately detect the shaking of the earthquake irrespective of the rolling and pitching, and also detect the magnitude and direction of the shaking, thereby obtaining a highly safe gas meter.
【００１０】また、３軸加速度センサは、立体角３６０
度を検出できるので、感知精度はメータの取付け姿勢に
影響されず、施工が容易になる。The three-axis acceleration sensor has a solid angle of 360.
Since the degree can be detected, the sensing accuracy is not affected by the mounting posture of the meter, and the construction is facilitated.
【００１１】また、請求項２記載の発明は、請求項１記
載のガスメータであって、前記衝撃値が規定値以上のと
き前記マイコン部からの信号の基づいて、出荷時に閉じ
られている前記遮断弁を復帰不能に構成したことを特徴
とするものである。According to a second aspect of the present invention, in the gas meter according to the first aspect, when the impact value is equal to or greater than a specified value, the shutoff is closed upon shipment based on a signal from the microcomputer unit. The valve is configured to be non-returnable.
【００１２】このため、請求項２記載の発明では、例え
ば輸送や施工中に衝撃を受け、その衝撃値が規定値以上
のときは閉じた遮断弁が復帰不能となって使用不能状態
となる。For this reason, according to the second aspect of the present invention, for example, a shock is received during transportation or construction, and when the shock value is equal to or greater than a specified value, the closed shut-off valve cannot be returned to an unusable state.
【００１３】また、請求項３記載の発明は、請求項１ま
たは２記載のガスメータであって、地震および衝撃の方
向および日時のデータを前記ガル値又は衝撃値と共に前
記マイコン部に記憶するようにしたことを特徴とするも
のである。According to a third aspect of the present invention, there is provided the gas meter according to the first or second aspect, wherein data of a direction and a date and time of an earthquake and an impact are stored in the microcomputer unit together with the galling value or the impact value. It is characterized by having done.
【００１４】このため、請求項３記載の発明では、衝撃
の大きさや方向、日時を画面で知ることができると共
に、後日衝撃のデータに基づいてクレームの解析やメー
タ管理を行うことが可能となる。Therefore, according to the third aspect of the present invention, it is possible to know the magnitude, direction, and date and time of the impact on the screen, and it is also possible to perform claim analysis and meter management based on the impact data at a later date. .
【００１５】[0015]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。なお、図２と同一部材または同一
機能のものは同一符号で示している。Embodiments of the present invention will be described below with reference to the drawings. The same members or those having the same functions as those in FIG. 2 are denoted by the same reference numerals.
【００１６】図１において、膜式のガスメータの内部
に、従来の地震センサ１に代えて３軸加速度センサ１０
が設けられ、さらに、電圧判定回路２、衝撃判別回路
３、マイコン部４、ディスプレイ６が内蔵されている。In FIG. 1, a three-axis acceleration sensor 10 is provided inside a membrane type gas meter in place of the conventional earthquake sensor 1.
And a voltage determination circuit 2, a shock determination circuit 3, a microcomputer unit 4, and a display 6.
【００１７】３軸加速度センサ１０は、Ｘ軸、Ｙ軸、Ｚ
軸より出力されている加速度信号の絶対値Ｇを、 Ｇ＝ √（Ｘ2 ＋Ｙ2 ＋Ｚ2 ） の演算で計算するものである。The three-axis acceleration sensor 10 has an X axis, a Y axis, and a Z axis.
The absolute value G of the acceleration signal output from the axis is calculated by the following equation: G = √ (X 2 + Y 2 + Z 2 ).
【００１８】３軸加速度センサ１０が地震の揺れ、ある
いは落下等による衝撃を受けると、３軸加速度センサ１
０からその大きさ（Ｇ）に対応した電圧値が出力され、
電圧判定回路２に送られる。When the three-axis acceleration sensor 10 receives an impact due to a shaking of an earthquake, a fall, or the like, the three-axis acceleration sensor 1
From 0, a voltage value corresponding to the magnitude (G) is output,
It is sent to the voltage judgment circuit 2.
【００１９】電圧判定回路２では、地震による揺れと衝
撃とを判別する機能を持っている。すなわち、地震の揺
れは衝撃よりもゆっくりした周期を持つので、その特性
を利用する。地震のゆっくりとした周期は３軸加速度セ
ンサ１０から出力される電圧値の変化として現れるの
で、その電圧値の変化に基づいて電圧判定回路２で地震
信号と判断する。The voltage judging circuit 2 has a function of discriminating between shaking and impact due to an earthquake. That is, since the shaking of the earthquake has a slower period than the shock, its characteristics are used. Since the slow cycle of the earthquake appears as a change in the voltage value output from the three-axis acceleration sensor 10, the voltage determination circuit 2 determines that the signal is an earthquake signal based on the change in the voltage value.
【００２０】電圧判定回路２で地震と判断された信号、
すなわち地震信号は衝撃判別回路３に送られ、衝撃判別
回路３で地震のガル値を計算する。ガル値が例えば８０
〜２５０ガルの加速度範囲の場合、マイコン部４からの
信号でガスメータの遮断弁５を閉じる。また、このガル
値はマイコン部４に記憶される。A signal determined by the voltage determination circuit 2 to be an earthquake;
That is, the earthquake signal is sent to the shock discrimination circuit 3, and the shock discrimination circuit 3 calculates the gull value of the earthquake. Gull value is, for example, 80
In the case of an acceleration range of up to 250 gal, the shutoff valve 5 of the gas meter is closed by a signal from the microcomputer unit 4. This gal value is stored in the microcomputer unit 4.
【００２１】地震以外の衝撃信号が３軸加速度センサ１
０に加わった場合、３軸加速度センサ１０からの電圧値
の変化（周期が地震信号より速い）に基づいて電圧判定
回路２が衝撃信号と判断し、衝撃判別回路３で計算され
た衝撃値はマイコン部４に記憶されると共に、そのとき
の衝撃値が規定値以上のときはマイコン部４からの信号
に基づいてディスプレイ６に警告表示する。例えば輸送
中の落下、施工時の落下等により規定値以上の衝撃を受
けた場合は、マイコン部４からの信号に基づいて、ディ
スプレイ６に警告表示する。この表示により施工前に衝
撃を受けたメータの使用不能を適確に判定することがで
きる。A shock signal other than an earthquake is a three-axis acceleration sensor 1
When it is added to 0, the voltage determination circuit 2 determines a shock signal based on a change in the voltage value from the three-axis acceleration sensor 10 (the cycle is faster than the earthquake signal), and the shock value calculated by the shock determination circuit 3 is When the shock value at that time is equal to or more than a specified value, a warning is displayed on the display 6 based on a signal from the microcomputer unit 4. For example, when a shock exceeding a specified value is received due to a drop during transportation, a drop during construction, or the like, a warning is displayed on the display 6 based on a signal from the microcomputer unit 4. With this display, it is possible to accurately determine whether or not the meter that has been impacted before use can be used.
【００２２】また、好ましくは規定値以上の衝撃を受け
たときに出荷時に閉じている遮断弁５はマイコン部４か
らの信号に基づいて施工後復帰をかけても復帰しないよ
うに構成する。この構成により輸送や施工中に衝撃を受
けた使用不能メータの使用を未然に防止できる。この復
帰不能は、例えば異常衝撃によりスイッチがＯＦＦとな
って電気的導通状態がカットされることにより遮断弁５
の開作動も不能とする方法や、異常衝撃があったという
情報と共にこの異常衝撃をマイコン部４が記憶し、その
後の遮断弁５の復帰操作に対してマイコン部４が復帰を
拒絶するようにして遮断弁５の開作動を不能とする方法
が採用される。Also, preferably, the shut-off valve 5 which is closed at the time of shipment upon receiving an impact equal to or more than a specified value is configured not to return even after returning after construction based on a signal from the microcomputer unit 4. With this configuration, it is possible to prevent the use of an unusable meter that has been impacted during transportation or construction. This inability to return can be caused, for example, by turning off the switch due to an abnormal impact and cutting off the electrical conduction state, thereby shutting off the shut-off valve 5.
The microcomputer unit 4 stores the method of disabling the opening operation of the valve and information on the fact that there is an abnormal shock, and rejects the returning operation of the shut-off valve 5 when the microcomputer unit 4 returns. Thus, a method of disabling the opening operation of the shutoff valve 5 is adopted.
【００２３】また、マイコン部４には、前記のガル値、
衝撃値のほか、地震または衝撃の方向、日時等もデータ
として記憶されている。マイコン部４に記憶されたデー
タは、メータ自体としてもマイコン部４から読み出すこ
とができるが、図１の破線で示すように、メータに付帯
させた設定器７、通信用コントローラ８からも読み出す
ことができ、ディスプレイ９に表示することができるよ
うになっている。したがって、衝撃の大きさや方向、日
時を画面で知ることで、クレームの解析やメータ管理を
行うことが可能となる。Further, the microcomputer unit 4 has the above-described gal value,
In addition to the shock value, the direction of the earthquake or shock, date and time, etc. are stored as data. The data stored in the microcomputer unit 4 can be read from the microcomputer unit 4 as the meter itself, but can also be read from the setting device 7 and the communication controller 8 attached to the meter as shown by the broken line in FIG. Can be displayed on the display 9. Therefore, by knowing the magnitude, direction, and date and time of the impact on the screen, it becomes possible to analyze the claims and perform meter management.
【００２４】以上のように、本実施の形態では、センサ
として３軸加速度センサ１０を使用しているので、横揺
れ、縦揺れの関係なく地震の揺れを正確にとらえること
ができ、また、揺れ（加速度）の大きさ、方向も検出で
きるため、輸送や施工中に生じた衝撃も判定でき、衝撃
による使用不能メータを適格に判定することができる。As described above, in this embodiment, since the three-axis acceleration sensor 10 is used as a sensor, the shaking of the earthquake can be accurately detected irrespective of the rolling and pitching, and the shaking can be performed. Since the magnitude and direction of (acceleration) can also be detected, it is possible to determine a shock generated during transportation or construction, and to appropriately determine an unusable meter due to the shock.
【００２５】また、３軸加速度センサ１０は立体核３６
０度を検出できるので、メータの取付け姿勢に影響され
ず、施工が容易になる。The three-axis acceleration sensor 10 has a three-dimensional core 36.
Since 0 degrees can be detected, the construction is facilitated without being affected by the mounting posture of the meter.
【００２６】[0026]
【発明の効果】以上、詳述したように、請求項１記載の
発明によれば、センサとして３軸加速度センサを使用し
たことにより、横揺れ、縦揺れの関係なく地震の揺れの
大きさ及び方向を正確にとらえることができ、また、施
工前の衝撃をディスプレイで警告表示することができる
ので、安全性の高いガスメータが得られる。また、立体
角３６０度を検出できるので、感知精度はメータの取付
け姿勢に影響されず、施工が容易になる。As described in detail above, according to the first aspect of the present invention, the use of the three-axis acceleration sensor as the sensor allows the magnitude and magnitude of the earthquake tremor to be irrespective of the roll and pitch. Since the direction can be accurately grasped and the impact before the construction can be displayed as a warning on the display, a highly safe gas meter can be obtained. Further, since the solid angle of 360 degrees can be detected, the sensing accuracy is not affected by the mounting posture of the meter, and the construction is facilitated.
【００２７】また、請求項２記載の発明によれば、施工
前の衝撃値が規定値以上のとき出荷時に閉じられている
遮断弁を復帰不能に構成したので、請求項１記載の発明
の効果に加えて、例えば輸送や施工中に衝撃を受けた使
用不能のメータを復帰させての使用を未然に防止でき
る。According to the second aspect of the present invention, the shut-off valve, which is closed at the time of shipment when the impact value before the construction is equal to or more than the specified value, is configured to be non-returnable. In addition, it is possible to prevent the use of an unusable meter that has been impacted during transportation or construction, for example, by returning it.
【００２８】また、請求項３記載の発明によれば、地震
および衝撃の方向および日時のデータをガル値又は衝撃
値と共に前記マイコン部に記憶するようにしたので、請
求項１または２記載の発明の効果に加えて、衝撃の大き
さや方向、日時を画面で知ることができると共に、衝撃
のデータに基づいてクレームの解析やメータ管理を行う
ことが可能となる。According to the third aspect of the present invention, the data of the direction and the date and time of the earthquake and the shock are stored in the microcomputer together with the gal or shock value. In addition to the effects described above, the magnitude, direction, and date and time of the impact can be known on the screen, and it is possible to perform claim analysis and meter management based on the impact data.
【図１】本発明のガスメータの実施の形態を示す論理回
線図である。FIG. 1 is a logical circuit diagram showing an embodiment of a gas meter according to the present invention.
【図２】従来のガスメータの論理回線図である。FIG. 2 is a logical circuit diagram of a conventional gas meter.
２ 電圧判定回路 ３ 衝撃判定回路 ４ マイコン部 ５ 遮断弁 ６ ディスプレイ １０ ３軸加速度センサ（地震センサ） 2 Voltage judgment circuit 3 Shock judgment circuit 4 Microcomputer unit 5 Shut-off valve 6 Display 10 3-axis acceleration sensor (earthquake sensor)
Claims (3)
該地震センサからの信号に基づいて遮断弁を作動させて
ガスの流れを遮断するようにしたガスメータであって、 前記地震センサとしてＸ軸、Ｙ軸、Ｚ軸より出力されて
いる加速度信号の絶対値を電圧値に変換して出力する３
軸加速度センサを使用し、前記電圧値を電圧判定回路に
入力して地震信号か地震以外の衝撃信号かを判断し、地
震信号であればそのガル値を衝撃判別回路で計算してそ
の値をマイコン部に記憶すると共に、前記ガル値が規定
値以上のときは、前記マイコン部からの信号に基づいて
前記遮断弁を閉じるようにし、衝撃信号であればその衝
撃値を前記衝撃判別回路で計算してその値を前記マイコ
ン部に記憶すると共に前記衝撃値が規定値以上のときは
前記マイコン部からの信号に基づいて衝撃を受けたこと
をディスプレイに警告表示するようにしたことを特徴と
するガスメータ。1. A built-in earthquake sensor for detecting vibration,
What is claimed is: 1. A gas meter configured to operate a shut-off valve based on a signal from said seismic sensor to shut off a gas flow, wherein the absolute value of an acceleration signal output from an X-axis, a Y-axis, or a Z-axis as the seismic sensor is provided. Convert the value to a voltage value and output 3
Using an axial acceleration sensor, the voltage value is input to a voltage determination circuit to determine whether the signal is an earthquake signal or a non-earthquake shock signal. The microcomputer stores the shut-off valve based on a signal from the microcomputer when the galling value is equal to or greater than a specified value, and if the signal is a shock signal, calculates the shock value by the shock discrimination circuit. And storing the value in the microcomputer section and, when the shock value is equal to or greater than a specified value, displaying a warning on a display based on a signal from the microcomputer section that a shock has been received. Gas meter.
コン部からの信号に基づいて、出荷時に閉じられている
前記遮断弁を復帰不能に構成したことを特徴とする請求
項１記載のガスメータ。2. The gas meter according to claim 1, wherein the shut-off valve, which is closed at the time of shipment, cannot be returned based on a signal from the microcomputer when the impact value is equal to or greater than a specified value. .
タを前記ガル値又は衝撃値と共に前記マイコン部に記憶
するようにしたことを特徴とする請求項１または２記載
のガスメータ。3. The gas meter according to claim 1, wherein data of the direction and date and time of the earthquake and shock are stored in said microcomputer together with said gal or shock value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29439897A JP3259830B2 (en) | 1997-10-27 | 1997-10-27 | Gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29439897A JP3259830B2 (en) | 1997-10-27 | 1997-10-27 | Gas meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11132823A true JPH11132823A (en) | 1999-05-21 |
| JP3259830B2 JP3259830B2 (en) | 2002-02-25 |
Family
ID=17807228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29439897A Expired - Fee Related JP3259830B2 (en) | 1997-10-27 | 1997-10-27 | Gas meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3259830B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007333450A (en) * | 2006-06-13 | 2007-12-27 | Matsushita Electric Ind Co Ltd | Gas-blast circuit breaker |
| JP2008114958A (en) * | 2006-11-02 | 2008-05-22 | Hitachi Ltd | Elevator device |
| JP2008139266A (en) * | 2006-12-05 | 2008-06-19 | Toshiba Corp | Vibration sensor and vibration-sensing method for gas channel |
| JP2009073581A (en) * | 2007-09-19 | 2009-04-09 | Hitachi Ltd | Elevator device |
| JP2012251841A (en) * | 2011-06-02 | 2012-12-20 | Tokyo Gas Co Ltd | Acceleration sensor-mounted meter |
-
1997
- 1997-10-27 JP JP29439897A patent/JP3259830B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007333450A (en) * | 2006-06-13 | 2007-12-27 | Matsushita Electric Ind Co Ltd | Gas-blast circuit breaker |
| JP2008114958A (en) * | 2006-11-02 | 2008-05-22 | Hitachi Ltd | Elevator device |
| JP2008139266A (en) * | 2006-12-05 | 2008-06-19 | Toshiba Corp | Vibration sensor and vibration-sensing method for gas channel |
| JP2009073581A (en) * | 2007-09-19 | 2009-04-09 | Hitachi Ltd | Elevator device |
| JP4597174B2 (en) * | 2007-09-19 | 2010-12-15 | 株式会社日立製作所 | Elevator equipment |
| JP2012251841A (en) * | 2011-06-02 | 2012-12-20 | Tokyo Gas Co Ltd | Acceleration sensor-mounted meter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3259830B2 (en) | 2002-02-25 |
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