JP3075196B2 - Seismic device - Google Patents
Seismic deviceInfo
- Publication number
- JP3075196B2 JP3075196B2 JP08298312A JP29831296A JP3075196B2 JP 3075196 B2 JP3075196 B2 JP 3075196B2 JP 08298312 A JP08298312 A JP 08298312A JP 29831296 A JP29831296 A JP 29831296A JP 3075196 B2 JP3075196 B2 JP 3075196B2
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- Japan
- Prior art keywords
- reference value
- value
- correcting
- seismic device
- signal
- 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.)
- Expired - Fee Related
Links
- 230000001133 acceleration Effects 0.000 claims description 101
- 238000012937 correction Methods 0.000 claims description 56
- 230000035945 sensitivity Effects 0.000 claims description 21
- 230000003321 amplification Effects 0.000 claims description 19
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 14
- 238000012545 processing Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 102000003712 Complement factor B Human genes 0.000 description 3
- 108090000056 Complement factor B Proteins 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Geophysics And Detection Of Objects (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ガスメーターなど
に設置されて地震を検知した時にガス供給を遮断する感
震装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic device installed in a gas meter or the like to cut off gas supply when an earthquake is detected.
【０００２】[0002]
【従来の技術】従来この種の感震装置は、実開昭６１−
４８６３４号公報のようなものが知られていた。以下、
その構成について図１１を参照しながら説明する。2. Description of the Related Art Conventionally, this kind of seismic device is disclosed in
No. 48634 has been known. Less than,
The configuration will be described with reference to FIG.
【０００３】図１１に示すように、底面１が凹円錐状と
なっている函体２内に転動自在に球３を収納し、函体２
の中蓋４によって上下方向摺動自在に保持された円盤５
の下面を同円盤５の自重によって球３の上面に当接さ
せ、同円盤５の上面に設けたプランジャ６をスイッチ機
構７に接触させて、円盤５の上方への移動によってスイ
ッチ機構７が作動するようになっていた。[0003] As shown in FIG. 11, a ball 3 is rollably stored in a box 2 having a bottom surface 1 having a concave conical shape.
Disk 5 slidably held in the vertical direction by an inner lid 4
The lower surface of the disk 5 is brought into contact with the upper surface of the ball 3 by the weight of the disk 5, the plunger 6 provided on the upper surface of the disk 5 is brought into contact with the switch mechanism 7, and the switch mechanism 7 is operated by moving the disk 5 upward. Was supposed to.
【０００４】上記構成において、函体２が所定角度以上
傾斜するか、または震動すると球３は円錐状底面１上を
中央から端へと転動する。この際、中心から端へ寄った
位置では底面１と円盤５の凹球面との間隔は小さくなっ
ているので、この間隔に入った球３によってプランジャ
６が押し上げられ接点８をオンする。In the above configuration, when the box 2 is inclined at a predetermined angle or more or vibrates, the ball 3 rolls on the conical bottom surface 1 from the center to the end. At this time, since the distance between the bottom surface 1 and the concave spherical surface of the disk 5 is small at a position closer to the end from the center, the plunger 6 is pushed up by the sphere 3 having this distance to turn on the contact 8.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら上記従来
の技術では、函体が傾いた時にスイッチ機構が働いて傾
きを検知できるが、どの程度傾いているかは検知できな
かった。そして、傾むくことによって球３の動きが異な
るので振動の検知精度が悪くなるという課題があった。However, in the above-mentioned prior art, when the box is tilted, the switch mechanism operates to detect the tilt, but it is not possible to detect how much the box is tilted. Then, since the movement of the ball 3 is different by tilting, there is a problem that the detection accuracy of the vibration is deteriorated.
【０００６】[0006]
【課題を解決するための手段】本発明は上記課題を解決
するために、振動加速度検出手段と、前記振動加速度検
出手段の信号から地震か否かを判別する地震判別手段
と、前記振動加速度検出手段の直流成分値と所定基準値
との差から傾斜を求める傾斜判別手段と、前記地震判別
手段からの地震判定信号か前記傾斜判別手段からの傾斜
判定信号かによってガス遮断手段を駆動する制御手段を
備えたものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a vibration acceleration detecting means, an earthquake determining means for determining whether or not an earthquake has occurred from a signal of the vibration acceleration detecting means; Inclination determining means for obtaining an inclination from a difference between a DC component value of the means and a predetermined reference value, and control means for driving a gas cutoff means based on an earthquake determination signal from the earthquake determination means or an inclination determination signal from the inclination determination means. It is provided with.
【０００７】上記発明によれば、傾いた傾斜値を定量的
に検出することができるとともに、傾斜した状態でも振
動加速度の信号や傾斜値から地震判別や傾きを検出して
精度よくガス遮断を行うことができる。According to the present invention, the tilt value can be quantitatively detected, and even in the tilted state, the seismic discrimination and the tilt are detected from the signal of the vibration acceleration and the tilt value to accurately shut off the gas. be able to.
【０００８】[0008]
【発明の実施の形態】本発明は、振動加速度検出手段
と、振動加速度検出手段の信号から地震か否かを判別す
る地震判別手段と、振動加速度検出手段の直流成分値と
所定基準値との差から傾斜を求める傾斜判別手段と、地
震判別手段からの地震判定信号か傾斜判別手段からの傾
斜判定信号によってガス遮断手段を駆動する制御手段を
備えている。そして、傾いた傾斜値を定量的に検出する
ことができるとともに、傾斜した状態でも振動加速度の
信号や傾斜値から地震判別や傾きを検出して精度よくガ
ス遮断を行うことができる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration acceleration detecting means, an earthquake discriminating means for discriminating whether or not there is an earthquake from a signal of the vibration acceleration detecting means, and a DC component value of the vibration acceleration detecting means and a predetermined reference value. An inclination determining means for obtaining an inclination from the difference and a control means for driving the gas shut-off means in accordance with an earthquake determination signal from the earthquake determining means or an inclination determination signal from the inclination determining means. In addition to being able to quantitatively detect the tilt value, even in the tilted state, it is possible to accurately detect the earthquake and detect the tilt from the vibration acceleration signal and the tilt value and perform gas shutoff with high accuracy.
【０００９】また、所定基準値を補正する基準値補正手
段を備えている。そして、基準値を補正することで傾斜
した状態でも精度よく加速度を検出することができる。Further, there is provided a reference value correcting means for correcting the predetermined reference value. Then, by correcting the reference value, the acceleration can be accurately detected even in the inclined state.
【００１０】また、直流成分値と所定基準値との差が所
定差値以上かつ所定時間以上の時、所定基準値を補正す
る基準値補正手段を備えている。そして、所定時間以上
の基準値のずれで基準値を補正することで傾斜した状態
を早期に補正することができる。[0010] Further, there is provided reference value correcting means for correcting the predetermined reference value when the difference between the DC component value and the predetermined reference value is not less than the predetermined difference value and not less than a predetermined time. Then, by correcting the reference value with a deviation of the reference value for a predetermined time or more, the inclined state can be corrected early.
【００１１】また、所定基準値を測定された直流成分値
の値に補正する基準値補正手段を備えている。そして、
測定値に基準値を補正することで傾斜による基準値のず
れを正確に補正することができる。[0011] Further, there is provided a reference value correcting means for correcting the predetermined reference value to the value of the measured DC component value. And
By correcting the reference value to the measured value, the deviation of the reference value due to the inclination can be accurately corrected.
【００１２】また、測定された直流成分値の平均値を求
めて所定基準値を補正する基準値補正手段を備えてい
る。そして、測定したときの振動加速度が変動している
場合でも傾斜による基準値のずれを補正して正確な振動
加速度を求めることができる。Further, there is provided reference value correcting means for obtaining an average value of the measured DC component values and correcting a predetermined reference value. Then, even when the measured vibration acceleration fluctuates, it is possible to correct the deviation of the reference value due to the inclination and to obtain an accurate vibration acceleration.
【００１３】また、直流成分値と所定基準値の差によっ
て求めた差分量より振動加速度を補正する検出値補正手
段を備えている。そして、計測された振動加速度を直接
補正することで傾斜による影響を低減することができ
る。Further, there is provided a detection value correcting means for correcting the vibration acceleration from the difference obtained by the difference between the DC component value and the predetermined reference value. Then, by directly correcting the measured vibration acceleration, the influence of the inclination can be reduced.
【００１４】また、測定された直流成分と基準値との差
に応じて振動加速度を求める感度係数を補正する感度補
正手段からなる検出値補正手段を備えている。そして、
基準値のずれ量により振動加速度を補正することで基準
値を補正することなく振動加速度が補正できるので基準
値をいつまでも保持して絶対傾斜を計測することができ
る。Further, there is provided detection value correction means comprising sensitivity correction means for correcting a sensitivity coefficient for obtaining a vibration acceleration according to a difference between the measured DC component and a reference value. And
Since the vibration acceleration can be corrected without correcting the reference value by correcting the vibration acceleration based on the deviation amount of the reference value, the absolute value can be measured while the reference value is kept forever.
【００１５】さらに、測定された直流成分と基準値との
差に応じて振動加速度を求める感度係数を補正する感度
補正手段からなる検出値補正手段を備えている。そし
て、感度補正手段によりソフト的に処理が可能となりハ
ードの追加なしに補正ができる。Further, there is provided detection value correction means comprising sensitivity correction means for correcting a sensitivity coefficient for obtaining vibration acceleration according to the difference between the measured DC component and the reference value. The processing can be performed by software by the sensitivity correction means, and the correction can be performed without adding hardware.
【００１６】また、測定された直流成分値と所定基準値
との差に応じて振動加速度検出手段の信号を増幅する信
号増幅手段と、信号増幅手段の信号増幅率を補正する増
幅率補正手段を備えている。そして、増幅率を補正する
ことで傾斜しても振動信号を計測範囲内で精度よく検出
することができる。The signal amplification means for amplifying the signal of the vibration acceleration detection means in accordance with the difference between the measured DC component value and the predetermined reference value, and the amplification factor correction means for correcting the signal amplification factor of the signal amplification means. Have. Then, by correcting the amplification factor, the vibration signal can be accurately detected within the measurement range even if the device is tilted.
【００１７】また、振動加速度検出手段は１cm／s2当た
り１〜２mVを出力する信号増幅手段を備えている。そし
て、電池のような低電圧を電力とした信号増幅手段でも
精度よく振動加速度を検出することができる。[0017] The vibration acceleration detecting means and a signal amplifying means for outputting a 1 cm / s 2 per 1～2MV. Then, the vibration acceleration can be detected with high accuracy even by a signal amplifying unit such as a battery using low voltage as electric power.
【００１８】また、定期的に直流成分値を測定し所定基
準値との差を確認して自動的に補正する自動基準値補正
手段を備えている。そして、定期的に自動補正すること
で傾斜によるずれ補正のメンテナンスが簡略化できる。Further, there is provided an automatic reference value correcting means for periodically measuring a DC component value, confirming a difference from a predetermined reference value, and automatically correcting the difference. Then, by performing the automatic correction periodically, the maintenance of the deviation correction due to the inclination can be simplified.
【００１９】また、基準値補正を開始させる補正操作手
段を備えている。そして、補正操作手段で基準値補正を
開始させることができるので、傾斜を確認したときに操
作者が自由に補正することができ、操作者によって基準
値の確認を正確に行うことができる。Further, a correction operation means for starting the correction of the reference value is provided. Then, since the reference value correction can be started by the correction operation means, when the inclination is confirmed, the operator can freely correct the reference value, and the operator can accurately confirm the reference value.
【００２０】また、定期的に基準振動を発生する基準振
動発生手段を備えている。そして、基準振動発生手段に
よって傾斜した状態でも真の振動加速度をチェックする
ことができるので基準値補正が精度よく行える。Further, a reference vibration generating means for periodically generating a reference vibration is provided. Further, since the true vibration acceleration can be checked even in the inclined state by the reference vibration generating means, the reference value can be accurately corrected.
【００２１】また、測定された直流成分値と所定基準値
との差量が設定値以上になった時、傾斜判別手段によっ
て傾斜を報知する報知手段を備えている。そして、傾斜
が所定値以上になったとき報知することで補正範囲外の
傾斜を知らせてメンテナンスすることができる。Further, there is provided a notifying means for notifying the inclination by the inclination discriminating means when the difference between the measured DC component value and the predetermined reference value exceeds a set value. By notifying when the inclination becomes equal to or more than a predetermined value, the inclination outside the correction range can be notified and maintenance can be performed.
【００２２】また、測定された直流成分値と所定基準値
の差が所定値以上の時、振動加速度検出手段の片振幅の
信号によって地震判別を行う地震判別手段を備えてい
る。そして、傾斜により信号が正負いずれかの方向にず
れても、他方の信号振幅を使用して振動加速度を検出し
地震判別することで精度よく検出できる。Further, when the difference between the measured DC component value and the predetermined reference value is equal to or more than a predetermined value, there is provided an earthquake discriminating means for performing an earthquake discrimination based on a signal of one amplitude of the vibration acceleration detecting means. Then, even if the signal is deviated in either the positive or negative direction due to the inclination, the vibration acceleration can be detected using the amplitude of the other signal and the earthquake can be determined to accurately detect the vibration acceleration.
【００２３】また、振動加速度検出手段の信号は９ビッ
ト以上のＡＤ変換器でデジタル信号に変換されるよう
に、またＡＤ変換器は１０ビットとしている。そして、
１０ビットのＡ／Ｄとすることで地震震度５の振動加速
度でも精度よく検出することができる。The signal of the vibration acceleration detecting means is converted into a digital signal by an AD converter of 9 bits or more, and the AD converter has 10 bits. And
By using a 10-bit A / D, it is possible to accurately detect even a vibration acceleration of seismic intensity 5.
【００２４】また、駆動電源として電池を用いている。
そして、電池を用いることで地震のような災害が発生し
た場合でも動作させることができる。A battery is used as a driving power source.
By using a battery, operation can be performed even when a disaster such as an earthquake occurs.
【００２５】以下、本発明の実施例について図面を参照
して説明する。 （実施例１）図１は本発明の実施例１の感震装置のブロ
ック図である。図１において、９は直流成分から検出可
能な周波数範囲を有する振動加速度検出手段、１０は振
動加速度検出手段９の容量型振動加速度センサー、１１
はその前置アンプ、１２はその信号増幅手段、１３は所
定基準値の信号源、１４は所定基準値との差をとる差分
検出手段、１５は差分検出手段の信号から傾斜値を求め
る傾斜判別手段、１６は信号増幅手段の信号から地震か
否かを判別する地震判別手段、１７は地震判別手段１６
からの地震判定信号か傾斜判別手段１５からの傾斜判定
信号によってガスを遮断するガス遮断手段、１８はガス
遮断手段１７を駆動する制御手段１８である。ここで、
１９はタイマー手段２０によって所定時間間隔で所定基
準値を補正する基準値補正手段としての自動基準値補正
手段、２１は以上の装置を駆動するための電源である電
池、２２は報知手段である。Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram of a seismic device according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 9 denotes vibration acceleration detecting means having a frequency range detectable from a DC component, 10 denotes a capacitive vibration acceleration sensor of the vibration acceleration detecting means 9, 11
Is a preamplifier thereof, 12 is a signal amplifying means thereof, 13 is a signal source of a predetermined reference value, 14 is a difference detecting means for obtaining a difference from the predetermined reference value, and 15 is a slope discrimination for obtaining a slope value from a signal of the difference detecting means. Means, 16 are earthquake discriminating means for discriminating whether or not there is an earthquake from the signal of the signal amplifying means, and 17 is earthquake discriminating means 16
Gas shut-off means for shutting off gas in response to an earthquake judgment signal from the vehicle or an inclination judgment signal from the inclination judgment means 15. here,
19 is an automatic reference value correcting means as a reference value correcting means for correcting a predetermined reference value at predetermined time intervals by a timer means 20, 21 is a battery serving as a power supply for driving the above-mentioned device, and 22 is a notifying means.
【００２６】次に動作、作用について図２から図７を用
いて説明する。図２に示すように、本発明の感震装置の
容量型加速度センサー１０は、振動板電極２３と、重り
部２４と、固定板２５で構成される。そして、通常地震
を検知するために、水平方向に主感度方向がくるように
設置される。しかし、何らかの影響で図３に示すように
傾斜した場合、重力加速度Ｇの影響で振動がない場合で
も前置アンプからは出力信号が発生する。すなわち、傾
斜角度θと出力電圧Ｖの関係は図４のようになり、例え
ば、１０°傾斜した場合、振動が０のときでも出力は基
準値から０．１７Ｖずれて０．８３Ｖになる。そして、
図５に示すように振動加速度の絶対値がずれるだけでな
く、計測できる加速度範囲も−Ｇ付近では信号が飽和し
てしまうので計測できなくなる。これでは、振動加速度
のレベルがわからなくなるので、この傾斜による基準値
のずれを定期的に補正することにした。Next, the operation and operation will be described with reference to FIGS. As shown in FIG. 2, the capacitive acceleration sensor 10 of the seismic device according to the present invention includes a diaphragm electrode 23, a weight 24, and a fixed plate 25. Then, in order to detect a normal earthquake, it is installed so that the main sensitivity direction is in the horizontal direction. However, when tilted as shown in FIG. 3 due to some influence, an output signal is generated from the preamplifier even when there is no vibration due to the influence of the gravitational acceleration G. That is, the relationship between the inclination angle θ and the output voltage V is as shown in FIG. 4. For example, when the inclination is 10 °, even when the vibration is 0, the output is shifted by 0.17 V from the reference value to 0.83 V. And
As shown in FIG. 5, not only does the absolute value of the vibration acceleration deviate, but also the measurable acceleration range becomes saturated near the -G because the signal is saturated. In this case, since the level of the vibration acceleration cannot be known, the deviation of the reference value due to the inclination is periodically corrected.
【００２７】ここで、定期的に自動補正する自動基準値
補正手段について説明する。傾斜した場合の振動加速度
の信号波形は、図６に示すようになる。すなわち、傾斜
した分だけマイナス側にシフトした波形信号となってい
る。このような状態において、自動基準値補正手段１９
がタイマー手段２０によって定期的にゼロ点のチェック
を行う。すなわち、所定の定期時間間隔Ｔ０ごとに信号
を検出し、所定基準値と比較する。ここで、計測値と所
定基準値が所定値以上（例えば、５cm／s2）違う場合
は、所定基準値がずれていると考え、その時の計測値を
所定基準値とする。ここで、計測値の変動が大きい場合
は平均値をとって直流成分を求め、計測値とすることで
所定基準値を補正することもできる。また、前回の計測
値との差を求めてずれを判定することもできる。Here, an automatic reference value correcting means for automatically correcting periodically will be described. The signal waveform of the vibration acceleration when inclined is as shown in FIG. That is, the waveform signal is shifted to the minus side by the amount of the inclination. In such a state, the automatic reference value correcting means 19
Periodically checks the zero point by the timer means 20. That is, a signal is detected at every predetermined regular time interval T0 and compared with a predetermined reference value. Here, when the measured value differs from the predetermined reference value by a predetermined value or more (for example, 5 cm / s 2 ), it is considered that the predetermined reference value is shifted, and the measured value at that time is set as the predetermined reference value. Here, when the fluctuation of the measured value is large, the DC component is obtained by taking an average value, and the predetermined reference value can be corrected by using the measured value as the measured value. In addition, it is also possible to determine the deviation by obtaining the difference from the previous measurement value.
【００２８】そして、計測値と所定基準値が所定値以上
になれば、傾斜角度が非常に大きくなったもの（傾斜角
１０°以上）と傾斜判別手段１５が判定し、ガス遮断弁
１７を閉止するとともに、報知手段２２としての表示ラ
ンプとブザー音によって報知される。When the measured value and the predetermined reference value are equal to or larger than a predetermined value, the inclination discriminating means 15 determines that the inclination angle is extremely large (inclination angle of 10 ° or more), and closes the gas shutoff valve 17. At the same time, the notification is made by a display lamp as the notification means 22 and a buzzer sound.
【００２９】また、地震判別は信号検出を定期的に行い
ながら振動レベルが所定値以上になるかどうかを監視し
ている。そして、所定値以上になったとき振動波形を観
測し波形の特徴から地震か否かを判定するものである。
そして、地震であると判定したときは、ガス遮断を行
う。図７にフローチャートを示す。The earthquake discrimination monitors whether or not the vibration level exceeds a predetermined value while periodically performing signal detection. Then, when the value exceeds a predetermined value, a vibration waveform is observed, and it is determined whether or not an earthquake has occurred based on the characteristics of the waveform.
When it is determined that an earthquake has occurred, the gas is shut off. FIG. 7 shows a flowchart.
【００３０】このように、傾いた傾斜値を定量的に検出
することができるとともに、傾斜した状態でも振動加速
度の信号や傾斜値から地震判別や傾きを検出してガス遮
断を行うことができる。そして、基準値を補正すること
で傾斜した状態でも精度よく振動加速度を検出すること
ができる。そして、所定時間以上の所定基準値のずれで
所定基準値を補正することで傾斜した状態を早期に補正
することができる。また、測定値に基準値を補正するこ
とで傾斜による基準値のずれを正確に補正することがで
きる。さらに、測定したときの振動加速度が変動してい
る場合でも平均化することで傾斜による基準値のずれを
補正して正確な振動加速度を求めることができる。そし
て、定期的に自動的に補正が行えるので補正のメンテナ
ンス作業が簡略化できる。As described above, the tilt value can be quantitatively detected, and even in the tilted state, the seismic discrimination and the tilt can be detected from the vibration acceleration signal and the tilt value to perform gas shutoff. Then, by correcting the reference value, it is possible to accurately detect the vibration acceleration even in the inclined state. Then, the tilted state can be corrected early by correcting the predetermined reference value with a deviation of the predetermined reference value for a predetermined time or more. In addition, by correcting the reference value to the measured value, the deviation of the reference value due to the inclination can be accurately corrected. Furthermore, even if the measured vibration acceleration fluctuates, by averaging, the deviation of the reference value due to the inclination can be corrected, and an accurate vibration acceleration can be obtained. Since the correction can be automatically performed periodically, the maintenance work for the correction can be simplified.
【００３１】（実施例２）図８は本発明の実施例２の感
震装置を示す構成図である。実施例１と異なる点は、検
出値補正手段２６としての感度補正手段２７、加速度補
正手段２８を備えたことにある。(Embodiment 2) FIG. 8 is a block diagram showing a seismic device according to Embodiment 2 of the present invention. The difference from the first embodiment is that a sensitivity correction unit 27 and an acceleration correction unit 28 are provided as the detection value correction unit 26.
【００３２】次に動作、作用について実施例１で参照し
たものと同じ図面である。図３から図５を用いて説明す
る。信号値Ｖが所定基準値Ｖ０よりずれたとき、そのず
れ量より振動加速度Ａを求める感度係数Ｋを補正するこ
とで精度の高い振動加速度Ａを検出することができる。
すなわち、振動によって変化する容量型振動加速度セン
サーの容量変化を周波数変化に変換し、さらにその周波
数変化を電圧変化に変換する。その結果、振動加速度が
電圧変化として検出できるのである。そして、振動加速
度Ａは、信号値Ｖと、所定基準値Ｖ０と、感度係数Ｋ
と、信号増幅率Ｂとから、Ａ＝Ｋ・（Ｂ・Ｖ−Ｖ０）と
して求められる。このとき、電圧変化を振動加速度に変
換するための感度係数Ｋは、振動加速度センサーの傾斜
角度θによって異なった値となる。なぜなら、図３に示
すように傾斜することによって主感度の方向がずれるた
めに、水平方向の振動に対して感度が鈍く働くことにな
る。その感度劣化を感度係数Ｋによって補正するのであ
る。感度係数Ｋは、θの関数として表され、Ｋ（θ）＝
ｋ／ｃｏs（θ）とすることができる。ここで、ｋは加
速度に対応させる定数である。これより、真の振動加速
度Ａ０は、Ａ０＝Ｋ（θ）・（Ｂ・Ｖ−Ｖ０）とするこ
とができる。また、θは測定された直流成分値を所定基
準値との差分量から求めるので、傾斜した状態でも精度
よく振動加速度を検出することが可能である。Next, the operation and operation are the same as those referred to in the first embodiment. This will be described with reference to FIGS. When the signal value V deviates from the predetermined reference value V0, a highly accurate vibration acceleration A can be detected by correcting the sensitivity coefficient K for obtaining the vibration acceleration A from the deviation amount.
That is, the capacitance change of the capacitive vibration acceleration sensor that changes due to vibration is converted into a frequency change, and the frequency change is further converted into a voltage change. As a result, the vibration acceleration can be detected as a voltage change. Then, the vibration acceleration A is calculated based on the signal value V, the predetermined reference value V0, and the sensitivity coefficient K
And the signal amplification factor B, A = K · (B · V−V0). At this time, the sensitivity coefficient K for converting the voltage change into the vibration acceleration has a different value depending on the inclination angle θ of the vibration acceleration sensor. This is because the direction of the main sensitivity shifts due to the inclination as shown in FIG. 3, so that the sensitivity is weakened with respect to the horizontal vibration. The sensitivity deterioration is corrected by the sensitivity coefficient K. The sensitivity coefficient K is expressed as a function of θ, where K (θ) =
k / cos (θ). Here, k is a constant corresponding to the acceleration. Thus, the true vibration acceleration A0 can be expressed as A0 = K (θ) · (B · V−V0). Further, since θ is obtained from the difference between the measured DC component value and the predetermined reference value, it is possible to accurately detect the vibration acceleration even in an inclined state.
【００３３】また、電圧出力Ｖは、振動加速度１cm／s2
当たり１mVの出力が発生するように設定してあるが、傾
斜することによって加速度ゼロのオフセット電圧値がず
れるため、図５に示すように測定できる範囲が狭くな
る。この現象を避けるためには、図９に示すような増幅
率補正手段２９によって増幅率を補正して、測定可能な
最大加速度を維持するようにした。ここで、３０はオペ
アンプ、３１から３４は抵抗、３５はＡ／Ｄ変換器、３
６はインターフェイス、３７はマイコンである。すなわ
ち、傾斜した場合、測定された直流成分値と所定差分値
との差分に応じて信号増幅率Ｂを設定することで信号が
飽和しないようにし、傾斜した状態でも最大加速度の検
出が可能となる。また、信号増幅率Ｂは、１mV／（cm／
s2）を基準として設定しているが、傾斜時には前記増幅
率補正手段によって補正される。そして、電池を使用し
ているため、加速度ゼロのオフセット電圧値は、１Ｖと
して、±１Ｖの電圧変動、すなわち±１０００cm／s2の
加速度変動が計測できるようにした。この範囲の振動加
速度が検出できることで、震度５相当の地震の振動加速
度レベルが計測可能となる。The voltage output V is 1 cm / s 2 of vibration acceleration.
Although an output of 1 mV per unit is set to be generated, an offset voltage value of zero acceleration shifts due to the inclination, so that the measurable range is narrowed as shown in FIG. In order to avoid this phenomenon, the amplification factor is corrected by the amplification factor correction means 29 as shown in FIG. 9 so that the measurable maximum acceleration is maintained. Here, 30 is an operational amplifier, 31 to 34 are resistors, 35 is an A / D converter, 3
6 is an interface, and 37 is a microcomputer. That is, in the case of inclination, the signal is not saturated by setting the signal amplification factor B according to the difference between the measured DC component value and the predetermined difference value, and the maximum acceleration can be detected even in the inclined state. . The signal amplification factor B is 1 mV / (cm /
s 2 ) is set as a reference, but is corrected by the amplification factor correction means at the time of inclination. Since a battery is used, the offset voltage value at zero acceleration is set to 1 V, so that a voltage fluctuation of ± 1 V, that is, an acceleration fluctuation of ± 1000 cm / s 2 can be measured. By detecting the vibration acceleration in this range, the vibration acceleration level of an earthquake with a seismic intensity of 5 can be measured.
【００３４】なお、図９に示すように、増幅率補正手段
２９としては、オペアンプ回路の抵抗値を切り替えて設
定することで可能となるとともに、その電圧信号を１０
ビットのＡ／Ｄ変換器３５でデジタル信号に変換した信
号をインターフェイス３６を介してマイコン３７に入力
し、前記地震判別や傾斜判別を行うことができる。ここ
で、±１０００cm／s2の加速度変動が計測できるように
してＡ／Ｄ変換すると、８ビットのＡ／Ｄ変換器では、
１ビット当たり７．８cm／s2になり、±５cm／s2以内の
精度で検出することができない。よって、９ビット以上
のＡ／Ｄ変換器が必要であるが、実用上は１０ビットの
Ａ／Ｄ変換器がよく利用されているので、１０ビットを
使用することが望ましい。１０ビットのＡ／Ｄ変換器で
は、１ビット当たり２cm／s2で計測することができるの
で精度よく計測が可能である。As shown in FIG. 9, the amplification factor correcting means 29 can be realized by switching and setting the resistance value of the operational amplifier circuit, and the voltage signal can be set to 10
A signal converted into a digital signal by the bit A / D converter 35 is input to the microcomputer 37 via the interface 36, and the above-described earthquake discrimination and tilt discrimination can be performed. Here, when the A / D conversion is performed so that the acceleration fluctuation of ± 1000 cm / s 2 can be measured, the 8-bit A / D converter has
One bit is 7.8 cm / s 2 and cannot be detected with an accuracy within ± 5 cm / s 2 . Therefore, an A / D converter of 9 bits or more is necessary. However, since a 10-bit A / D converter is often used in practice, it is preferable to use 10 bits. A 10-bit A / D converter can measure at 2 cm / s 2 per bit, so it can measure accurately.
【００３５】また、図１０のように傾斜が所定以上にな
ると振動加速度の信号波形が、飽和してしまうことにな
る。本来は所定傾斜以上になれば傾斜判別手段が傾斜の
報知とガスを遮断するのであるが、何らかの影響で補正
処理または傾斜判別処理が行われる前に地震が発生した
場合は、振動加速度の信号波形が、飽和してしまうこと
になるのである。このような場合、信号波形の片振幅信
号だけを用いて、地震判別手段が地震か否かを判別する
ようにした。すなわち、傾斜によってシフトした基準値
を直流成分値として求め、計測した信号レベルと差分を
とる。そして、飽和していない波形信号のみを使用して
地震波形か否かを判定する。よって、傾斜した状態で補
正する前に地震が発生しても、地震判別には影響なく精
度よく判別処理を行うことができる。When the inclination exceeds a predetermined value as shown in FIG. 10, the signal waveform of the vibration acceleration becomes saturated. Originally, the inclination discriminating means reports the inclination and shuts off the gas when the inclination becomes equal to or more than the predetermined inclination.However, if an earthquake occurs before the correction processing or the inclination judgment processing is performed due to some influence, the signal waveform of the vibration acceleration Will saturate. In such a case, the earthquake discriminating means discriminates whether or not there is an earthquake using only one amplitude signal of the signal waveform. That is, a reference value shifted by the inclination is obtained as a DC component value, and a difference from the measured signal level is obtained. Then, it is determined whether or not the waveform is an earthquake waveform using only the non-saturated waveform signal. Therefore, even if an earthquake occurs before the correction is performed in a tilted state, it is possible to accurately perform the determination processing without affecting the earthquake determination.
【００３６】このように、計測された振動加速度を直接
補正することで傾斜による影響を低減することができ、
基準値を補正することなく振動加速度が補正できるので
基準値をいつまでも保持して絶対傾斜を計測することが
できる。そして、感度補正手段によりソフト的に処理が
可能となりハードの追加なしに補正ができる。そして、
増幅率を補正することで傾斜しても振動信号を計測範囲
内で精度よく検出することができる。また、振動加速度
検出手段は１cm／s2当たり１mVを出力する信号増幅手段
を備えることで、電池のような低電圧を電力とした信号
増幅手段でも精度よく振動加速度を検出することができ
る。そして、傾斜した状態で補正する前に地震が発生し
ても、片振幅信号だけを用いて判別処理を精度よく行う
ことができる。As described above, by directly correcting the measured vibration acceleration, the influence of the inclination can be reduced.
Since the vibration acceleration can be corrected without correcting the reference value, it is possible to measure the absolute inclination while holding the reference value forever. The processing can be performed by software by the sensitivity correction means, and the correction can be performed without adding hardware. And
By correcting the amplification factor, the vibration signal can be accurately detected within the measurement range even if the device is tilted. Further, since the vibration acceleration detecting means includes a signal amplifying means that outputs 1 mV per 1 cm / s 2 , the vibration acceleration can be detected with high accuracy even by a signal amplifying means using a low voltage as a power, such as a battery. Then, even if an earthquake occurs before the correction is performed in the inclined state, it is possible to accurately perform the discrimination processing using only the one-amplitude signal.
【００３７】（実施例３）図１１は本発明の実施例３の
感震装置を示す構成図である。実施例１と異なる点は、
基準振動発生手段としてのガス遮断弁３８と補正操作手
段３９を備えたことにある。(Embodiment 3) FIG. 11 is a configuration diagram showing a seismic device according to Embodiment 3 of the present invention. The difference from the first embodiment is
A gas shut-off valve 38 as a reference vibration generating means and a correction operating means 39 are provided.
【００３８】次に動作、作用について説明する。補正操
作手段３９によって基準値の補正を強制的に動作させる
ために必要な基準信号を、ガス遮断弁３８の振動によっ
て発生させる。すなわち、ガス遮断弁を閉止動作させる
ことで弁の衝撃振動が発生する。この振動を振動加速度
センサーで検出して初期の検出レベルと比較する。検出
レベルが所定値未満にあれば傾斜補正をする必要がない
が、所定値以上のときは、補正を行うようにすることで
人的に振動加速度の検出レベルが正しいかどうかを確認
することができる。Next, the operation and operation will be described. A reference signal required for forcibly operating the correction of the reference value by the correction operation means 39 is generated by the vibration of the gas cutoff valve 38. That is, the closing operation of the gas shut-off valve causes impact vibration of the valve. This vibration is detected by a vibration acceleration sensor and compared with an initial detection level. If the detection level is less than the predetermined value, it is not necessary to perform tilt correction.However, if the detection level is higher than the predetermined value, it is possible to manually confirm whether the detection level of the vibration acceleration is correct by performing the correction. it can.
【００３９】このように、基準値補正を開始させる補正
操作手段を備えることで、傾斜を確認したいときに操作
者が自由に補正することができ、操作者によって基準値
の確認を正確に行うことができる。そして、基準振動発
生手段によって傾斜した状態でも真の振動加速度をチェ
ックすることができるので基準値補正を精度よく行うこ
とができる。As described above, the provision of the correction operation means for starting the correction of the reference value allows the operator to freely correct the inclination when he / she wants to check the inclination, and the operator can accurately check the reference value. Can be. The true vibration acceleration can be checked even in the inclined state by the reference vibration generating means, so that the reference value can be accurately corrected.
【００４０】[0040]
【発明の効果】以上説明したように本発明の感震装置に
よれば、次の効果が得られる。As described above, according to the seismic device of the present invention, the following effects can be obtained.
【００４１】まず、振動加速度検出手段の信号から地震
か否かを判別する地震判別手段と、前記振動加速度検出
手段の直流成分と所定基準値との差値を傾斜値とする傾
斜判別手段と、前記地震判別手段からの地震判定信号か
前記傾斜判別手段からの傾斜判定信号によってガス遮断
手段を駆動する制御手段を備えることで、傾いた傾斜値
を定量的に検出することができるとともに、傾斜した状
態でも振動加速度の信号や傾斜値から地震判別や傾きを
検出してガス遮断を行うことができる。First, an earthquake discriminating means for discriminating whether or not an earthquake has occurred from a signal of the vibration acceleration detecting means, an inclination discriminating means for setting a difference value between a DC component of the vibration acceleration detecting means and a predetermined reference value as an inclination value, By providing control means for driving the gas shut-off means in accordance with the earthquake determination signal from the earthquake determination means or the tilt determination signal from the tilt determination means, it is possible to quantitatively detect the tilt value of the tilt, and tilt Even in the state, it is possible to detect the earthquake and detect the inclination from the signal of the vibration acceleration and the inclination value to perform the gas shutoff.
【００４２】また、所定基準値を補正する基準値補正手
段を備えることで、基準値を補正することで傾斜した状
態でも精度よく加速度を検出することができる。Further, by providing the reference value correcting means for correcting the predetermined reference value, the acceleration can be detected with high accuracy even in a tilted state by correcting the reference value.
【００４３】また、直流成分値と所定基準値との差が所
定差値以上かつ所定時間以上の時、所定基準値を補正す
る基準値補正手段を備えることで、所定時間以上の基準
値のずれで基準値を補正することで傾斜した状態を早期
に補正することができる。Further, when the difference between the DC component value and the predetermined reference value is equal to or more than the predetermined difference value and is equal to or more than the predetermined time, reference value correcting means for correcting the predetermined reference value is provided, so that the deviation of the reference value for the predetermined time or more is provided. By correcting the reference value with, the inclined state can be corrected early.
【００４４】また、所定基準値を測定された直流成分値
の値に補正する基準値補正手段を備えることで、測定値
に基準値を補正することで傾斜による基準値のずれを正
確に補正することができる。Further, by providing a reference value correcting means for correcting the predetermined reference value to the value of the measured DC component value, the deviation of the reference value due to the inclination can be accurately corrected by correcting the reference value to the measured value. be able to.
【００４５】また、測定された直流成分値の平均値を求
めて所定基準値を補正する基準値補正手段を備えること
で、測定したときの振動加速度が変動している場合でも
傾斜による基準値のずれを補正して正確な振動加速度を
求めることができる。Further, by providing the reference value correcting means for obtaining the average value of the measured DC component values and correcting the predetermined reference value, even if the vibration acceleration at the time of measurement is fluctuating, the reference value of the reference value due to the inclination is changed. By correcting the displacement, an accurate vibration acceleration can be obtained.
【００４６】また、直流成分値と所定基準値との差によ
って求めた差分量より振動加速度を補正する検出値補正
手段を備えることで、基準値のずれ量により振動加速度
を補正することで基準値を補正することなく振動加速度
が補正できるので基準値をいつまでも保持して絶対傾斜
を計測することができる。Further, by providing a detection value correcting means for correcting the vibration acceleration based on the difference obtained by the difference between the DC component value and the predetermined reference value, the vibration acceleration is corrected based on the deviation of the reference value, thereby obtaining the reference value. Since the vibration acceleration can be corrected without correcting the absolute value, the absolute value can be measured while the reference value is kept forever.
【００４７】さらに、測定された直流成分と基準値との
差に応じて振動加速度を求める感度係数を補正する感度
補正手段からなる検出値補正手段を備えることで、感度
補正手段によりソフト的に処理が可能となりハードの追
加なしに補正ができる。Further, by providing detection value correction means comprising sensitivity correction means for correcting a sensitivity coefficient for obtaining a vibration acceleration in accordance with the difference between the measured DC component and the reference value, the sensitivity correction means can perform processing by software. And correction can be performed without adding hardware.
【００４８】また、測定された直流成分値と所定基準値
との差に応じて振動加速度検出手段の信号増幅率を補正
する増幅率補正手段を備えることで、増幅率を補正する
ことで傾斜しても振動信号を計測範囲内で精度よく検出
することができる。Further, by providing amplification factor correction means for correcting the signal amplification factor of the vibration acceleration detection means in accordance with the difference between the measured DC component value and the predetermined reference value, the inclination is corrected by correcting the amplification factor. Even so, the vibration signal can be accurately detected within the measurement range.
【００４９】また、振動加速度検出手段は１cm／s2当た
り１〜２mVを出力する信号増幅手段を備えることで、電
池のような低電圧を電力とした信号増幅手段でも精度よ
く振動加速度を検出することができる。The vibration acceleration detecting means includes a signal amplifying means for outputting 1-2 mV per 1 cm / s 2 , so that even a signal amplifying means such as a battery using low voltage as power can accurately detect vibration acceleration. be able to.
【００５０】また、定期的に直流成分値を測定し所定基
準値との差を確認して自動的に補正する自動基準値補正
手段を備えることで、定期的に自動補正することで傾斜
によるずれ補正のメンテナンスが簡略化できる。Also, an automatic reference value correcting means for periodically measuring a DC component value, confirming a difference from a predetermined reference value, and automatically correcting the difference is provided. Maintenance of correction can be simplified.
【００５１】また、基準値補正を開始させる補正操作手
段を備えることで、補正操作手段で基準値補正を開始さ
せることができるので、傾斜を確認したときに操作者が
自由に補正することができ、操作者によって基準値の確
認を正確に行うことができる。Further, by providing the correction operation means for starting the reference value correction, the correction operation means can start the reference value correction. Therefore, when the inclination is confirmed, the operator can freely make correction. The operator can accurately confirm the reference value.
【００５２】また、基準振動を発生する基準振動発生手
段を備えることで、基準振動発生手段によって傾斜した
状態でも真の振動加速度をチェックすることができるの
で基準値補正が精度よく行える。Further, by providing the reference vibration generating means for generating the reference vibration, the true vibration acceleration can be checked even in a state where the reference vibration generating means is inclined, so that the reference value can be corrected with high accuracy.
【００５３】また、測定された直流成分値と所定基準値
との差量が設定値以上になった時、傾斜判別手段によっ
て傾斜を報知する報知手段を備えることで、傾斜が所定
値以上になったとき報知することで補正範囲外の傾斜を
知らせてメンテナンスすることができる。When the difference between the measured DC component value and the predetermined reference value is equal to or greater than the set value, the inclination determining means is provided with an informing means for informing the inclination. When the alarm is issued, the inclination outside the correction range can be notified to perform maintenance.
【００５４】また、測定された直流成分値と所定基準値
の差が所定値以上の時、振動加速度検出手段の片振幅の
信号によって地震判別を行う地震判別手段を備えること
で、傾斜により信号が正負いずれかの方向にずれても、
他方の信号振幅を使用して振動加速度を検出し地震判別
することで精度よく検出できる。Further, when the difference between the measured DC component value and the predetermined reference value is equal to or larger than a predetermined value, there is provided a seismic discriminating means for performing a seismic discrimination by a signal of one amplitude of the vibration acceleration detecting means. Even if it shifts in either direction,
The vibration acceleration can be detected by using the other signal amplitude and the earthquake can be determined, so that the detection can be accurately performed.
【００５５】また、振動加速度検出手段の信号は９ビッ
ト以上の１０ビットＡＤ変換器でデジタル信号に変換さ
れるようにすることで、１０ビットのＡ／Ｄとすること
で地震震度５の振動加速度でも精度よく検出することが
できる。The signal of the vibration acceleration detecting means is converted into a digital signal by a 9-bit or more 10-bit AD converter, and is converted into a 10-bit A / D signal. However, it can be detected with high accuracy.
【００５６】また、駆動電源として電池を用いること
で、電池を用いることで地震のような災害が発生した場
合でも動作させることができる。Further, by using a battery as the driving power source, the battery can be used to operate even when a disaster such as an earthquake occurs.
【図１】本発明の実施例１の感震装置のブロック図FIG. 1 is a block diagram of a seismic device according to a first embodiment of the present invention.
【図２】同感震装置の振動加速度センサーの構成図FIG. 2 is a configuration diagram of a vibration acceleration sensor of the seismic device.
【図３】同感震装置の振動加速度センサーの傾斜時の構
成図FIG. 3 is a configuration diagram when the vibration acceleration sensor of the seismic device is tilted.
【図４】同感震装置の振動加速度センサーの動作を説明
する特性図FIG. 4 is a characteristic diagram illustrating an operation of a vibration acceleration sensor of the seismic device.
【図５】同感震装置の振動加速度センサーの動作を説明
する他の特性図FIG. 5 is another characteristic diagram illustrating the operation of the vibration acceleration sensor of the seismic device.
【図６】同感震装置の振動加速度センサーの動作を説明
する更に他の特性図FIG. 6 is still another characteristic diagram illustrating the operation of the vibration acceleration sensor of the seismic device.
【図７】同感震装置の動作を示すフローチャートFIG. 7 is a flowchart showing the operation of the seismic device.
【図８】本発明の第２の実施例を示す感震装置の構成図FIG. 8 is a configuration diagram of a seismic device showing a second embodiment of the present invention.
【図９】同感震装置の信号増幅手段の構成図FIG. 9 is a configuration diagram of a signal amplification unit of the seismic device.
【図１０】同感震装置の動作を示す特性図FIG. 10 is a characteristic diagram showing an operation of the seismic device.
【図１１】本発明の第３の実施例を示す感震装置の構成
図FIG. 11 is a configuration diagram of a seismic device showing a third embodiment of the present invention.
【図１２】従来の感震装置を示す構成図FIG. 12 is a configuration diagram showing a conventional seismic device.
９ 振動加速度検出手段 １０ 容量型振動加速度センサー １２ 信号増幅手段 １３ 所定基準値の信号源 １４ 差分検出手段 １５ 傾斜判別手段 １６ 地震判別手段 １７ ガス遮断手段 １８ 制御手段 １９ 自動基準値補正手段 ２１ 電池 ２２ 報知手段 ２６ 検出値補正手段 ２７ 感度補正手段 ２８ 加速度補正手段 ３９ 補正操作手段 Reference Signs List 9 vibration acceleration detecting means 10 capacitive vibration acceleration sensor 12 signal amplifying means 13 signal source of predetermined reference value 14 difference detecting means 15 inclination determining means 16 earthquake determining means 17 gas shutoff means 18 control means 19 automatic reference value correcting means 21 battery 22 Notification means 26 Detection value correction means 27 Sensitivity correction means 28 Acceleration correction means 39 Correction operation means
フロントページの続き (56)参考文献 特開 平８−240477（ＪＰ，Ａ) 特開 平８−285952（ＪＰ，Ａ) 特開 平10−118205（ＪＰ，Ａ) 特開 平９−168230（ＪＰ，Ａ) 特開 平４−319628（ＪＰ，Ａ) 実開 昭61−48634（ＪＰ，Ｕ) 実開 昭61−127427（ＪＰ，Ｕ) 実開 昭57−93829（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01V 1/18 G01F 3/22 G01H 1/00 G01V 1/00 G01V 1/28 Continuation of the front page (56) References JP-A-8-240477 (JP, A) JP-A-8-285952 (JP, A) JP-A-10-118205 (JP, A) JP-A-9-168230 (JP) JP-A-4-319628 (JP, A) JP-A-61-48634 (JP, U) JP-A-61-127427 (JP, U) JP-A-57-93829 (JP, U) (58) Field surveyed (Int.Cl. 7 , DB name) G01V 1/18 G01F 3/22 G01H 1/00 G01V 1/00 G01V 1/28
Claims (17)
出手段の信号から地震か否かを判別する地震判別手段
と、前記振動加速度検出手段の直流成分値と所定基準値
との差から傾斜を求める傾斜判別手段と、前記地震判別
手段からの地震判定信号か前記傾斜判別手段からの傾斜
判定信号かによってガス遮断手段を駆動する制御手段を
備えた感震装置。1. A vibration acceleration detecting means, an earthquake discriminating means for judging whether or not there is an earthquake from a signal of the vibration acceleration detecting means, and an inclination based on a difference between a DC component value of the vibration acceleration detecting means and a predetermined reference value. A seismic device comprising: a slope discriminating means to be obtained; and a control means for driving a gas cutoff means based on an earthquake judgment signal from the earthquake discriminating means or a tilt judgment signal from the tilt discriminating means.
えた請求項１記載の感震装置。2. The seismic device according to claim 1, further comprising reference value correction means for correcting a predetermined reference value.
以上かつ所定時間以上の時、前記所定基準値を補正する
基準値補正手段を備えた請求項２記載の感震装置。3. The seismic device according to claim 2, further comprising reference value correction means for correcting the predetermined reference value when a difference between the DC component value and the predetermined reference value is equal to or more than a predetermined difference value and is equal to or more than a predetermined time.
補正する基準値補正手段を備えた請求項２記載の感震装
置。4. The seismic device according to claim 2, further comprising reference value correction means for correcting a predetermined reference value to the measured DC component value.
定基準値を補正する基準値補正手段を備えた請求項４記
載の感震装置。5. The seismic device according to claim 4, further comprising reference value correction means for obtaining an average value of the measured DC component values and correcting a predetermined reference value.
た差量より振動加速度を補正する検出値補正手段を備え
た請求項１記載の感震装置。6. The seismic device according to claim 1, further comprising detection value correction means for correcting vibration acceleration based on a difference obtained from a difference between the DC component value and the predetermined reference value.
て振動加速度を求める感度係数を補正する感度補正手段
からなる検出値補正手段を備えた請求項６記載の感震装
置。7. The seismic device according to claim 6, further comprising a detection value correcting means for correcting a sensitivity coefficient for obtaining a vibration acceleration according to a difference between the measured DC component and the reference value.
に応じて振動加速度検出手段の信号を増幅する信号増幅
手段と、前記信号増幅手段の信号増幅率を補正する増幅
率補正手段を備えた請求項１記載の感震装置。8. A signal amplifying means for amplifying a signal of a vibration acceleration detecting means according to a difference between a measured DC component value and a predetermined reference value, and an amplification factor correcting means for correcting a signal amplification factor of the signal amplifying means. The seismic device according to claim 1, further comprising:
２mVを出力する信号増幅手段を備えた請求項８記載の感
震装置。9. The method according to claim 1, wherein the vibration acceleration detecting means is 1 to 1 cm / s 2 .
9. The seismic device according to claim 8, further comprising a signal amplifying means for outputting 2 mV.
との差を確認して自動的に補正する自動基準値補正手段
を備えた請求項２，３又は８記載の感震装置。10. The seismic device according to claim 2, further comprising an automatic reference value correcting means for periodically measuring a DC component value, confirming a difference from a predetermined reference value, and automatically correcting the difference.
備えた請求項２，３又８記載の感震装置。11. The seismic device according to claim 2, further comprising a correction operation means for starting correction of the reference value.
備えた請求項１１記載の感震装置。12. The seismic device according to claim 11, further comprising a reference vibration generating means for generating a reference vibration.
差量が設定値以上になった時、傾斜判別手段によって傾
斜を報知する報知手段を備えた請求項１記載の感震装
置。13. The seismic device according to claim 1, further comprising a notifying means for notifying the inclination by the inclination discriminating means when the difference between the measured DC component value and the predetermined reference value is equal to or greater than a set value.
が所定値以上の時、振動加速度検出手段の片振幅の信号
によって地震判別を行う地震判別手段を備えた請求項１
記載の感震装置。14. An apparatus according to claim 1, further comprising: an earthquake discriminating means for performing an earthquake discrimination based on a one-amplitude signal of the vibration acceleration detecting means when a difference between the measured DC component value and a predetermined reference value is equal to or larger than a predetermined value.
The described seismic device.
上のＡＤ変換器でデジタル信号に変換される請求項１記
載の感震装置。15. The seismic device according to claim 1, wherein the signal of the vibration acceleration detecting means is converted into a digital signal by an AD converter of 9 bits or more.
５記載の感震装置。16. An A / D converter comprising 10 bits.
5. The seismic device according to 5.
１６のいずれか１項に記載の感震装置。17. A battery according to claim 1, wherein a battery is used as a driving power source.
The seismic device according to any one of items 16 to 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08298312A JP3075196B2 (en) | 1996-11-11 | 1996-11-11 | Seismic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08298312A JP3075196B2 (en) | 1996-11-11 | 1996-11-11 | Seismic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10142347A JPH10142347A (en) | 1998-05-29 |
| JP3075196B2 true JP3075196B2 (en) | 2000-08-07 |
Family
ID=17858024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08298312A Expired - Fee Related JP3075196B2 (en) | 1996-11-11 | 1996-11-11 | Seismic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3075196B2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3037676B1 (en) * | 1999-01-14 | 2000-04-24 | 大阪瓦斯株式会社 | Gas meter seismic sensing device |
| JP2008170213A (en) * | 2007-01-10 | 2008-07-24 | Toshiba Corp | Ultrasonic flowmeter |
| JP5190875B2 (en) * | 2008-03-04 | 2013-04-24 | 国立大学法人広島大学 | Monitoring system and sensor unit used therefor |
| JP5140464B2 (en) * | 2008-03-12 | 2013-02-06 | 東光東芝メーターシステムズ株式会社 | Ultrasonic gas meter |
| JP2011242246A (en) * | 2010-05-18 | 2011-12-01 | Tamagawa Seiki Co Ltd | Method for detecting earthquake acceleration |
| JP2012018033A (en) * | 2010-07-07 | 2012-01-26 | Panasonic Corp | Seismic sensing device for gas meter |
| JP5773905B2 (en) * | 2012-02-10 | 2015-09-02 | 東京瓦斯株式会社 | Gas meter with acceleration sensor |
| JP6174911B2 (en) * | 2013-05-30 | 2017-08-02 | パナソニック株式会社 | Gas shut-off device |
| JP6857838B2 (en) * | 2016-09-08 | 2021-04-14 | パナソニックＩｐマネジメント株式会社 | Seismic unit and distribution board equipped with it |
| JP7055701B2 (en) * | 2018-05-24 | 2022-04-18 | 矢崎エナジーシステム株式会社 | Gas meter |
| JP2019211298A (en) * | 2018-06-04 | 2019-12-12 | パナソニックＩｐマネジメント株式会社 | Gas meter |
-
1996
- 1996-11-11 JP JP08298312A patent/JP3075196B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10142347A (en) | 1998-05-29 |
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