JP4665642B2 - Gas meter device - Google Patents
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- JP4665642B2 JP4665642B2 JP2005209721A JP2005209721A JP4665642B2 JP 4665642 B2 JP4665642 B2 JP 4665642B2 JP 2005209721 A JP2005209721 A JP 2005209721A JP 2005209721 A JP2005209721 A JP 2005209721A JP 4665642 B2 JP4665642 B2 JP 4665642B2
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Description
本発明は、各家庭でのガス供給管の入り口部分に設置され、ガス流量を計測するガスメータにおいて、ガス器具別料金等の使用器具やその使い方に合わせた新料金やサービスを提供するために使用中のガス器具を判別検知する技術に関するものである。 The present invention is installed at the entrance of a gas supply pipe in each home, and is used to provide a new fee and service according to the usage equipment such as a separate fee for gas equipment, etc. in a gas meter for measuring the gas flow rate. The present invention relates to a technology for discriminating and detecting a gas appliance inside.
従来、この種のガスメータ装置の事例としては、以下に示すような構成がある（例えば特許文献１参照）。 Conventionally, as an example of this type of gas meter device, there is a configuration as shown below (see, for example, Patent Document 1).
一般的に各家庭にはガス供給ラインの入り口にガスの流量計を内蔵したガスメータが取り付けられている。 In general, a gas meter with a gas flow meter is installed at the entrance of a gas supply line in each household.
従来のガスメータにおいて器具別料金を実施する場合、ガスメータに接続された複数の積算装置を用い、特定の時間使用された場合の積算流量や特定の範囲の流量が使用されている場合の積算値を求め、すなわち時間区分別流量や流量区分別流量を求め、その積算値でもって料金体系を決めるものである。図１１をもとに料金体系の１例について説明を加える。予め所定の割引流量区分、及び所定の割引時間帯を設定し、その割引流量区分かつ割引時間帯に該当する流量のガス料金を割引対象とする。すなわち図１１で斜線で区分された部分が対象となる。しかしながら、この方法では、器具の特定判断が曖昧であり、特定器具に対して料金を課金する等のより消費者にわかりやすく利便性のある料金設定を行うことは困難である。そこで、特定の器具を判別するための方法として、以下に示すような提案がなされている。 When a separate charge is applied to a conventional gas meter, the integrated flow rate when using a plurality of integrating devices connected to the gas meter for a specific time or when a specific range of flow rate is used is calculated. In other words, the flow rate for each time segment and the flow rate for each flow segment are determined, and the charge system is determined based on the integrated value. An example of the fee system will be described based on FIG. A predetermined discount flow rate category and a predetermined discount time zone are set in advance, and the gas rate of the flow rate corresponding to the discount flow rate category and the discount time zone is targeted for discount. That is, the part divided by the oblique line in FIG. However, with this method, the specific determination of the appliance is ambiguous, and it is difficult to make a convenient and easy-to-understand fee setting such as charging a fee for the specific appliance. Therefore, the following proposal has been made as a method for discriminating a specific instrument.
提案例の動作について説明する。ガスメータ装置では上記した様に２秒間隔毎にガス流量を計測し、そのデータを演算手段に送り流量値を微分して２秒毎の流量の差分データとして出力している。 The operation of the proposed example will be described. In the gas meter device, as described above, the gas flow rate is measured every 2 seconds, the data is sent to the calculation means, and the flow rate value is differentiated and output as the difference data of the flow rate every 2 seconds.
この差分データは逐次、判別手段に送られ、記憶手段に登録されている比較判定値との比較を行っている。差分値が比較判定値を超えた場合、ガス器具に状態変化があったと判断する。変化が検知されると、さらにどのガス器具がどのような状態なのか判断するため、判別手段は記憶手段に登録されている各ガス器具の比較変化値と比較し、器具の判別とその器具の状態の判別を行う。 The difference data is sequentially sent to the discrimination means and compared with the comparison judgment value registered in the storage means. When the difference value exceeds the comparison determination value, it is determined that the gas appliance has changed state. When a change is detected, in order to further determine which gas appliance is in what state, the discriminating means compares it with the comparative change value of each gas appliance registered in the memory means, Determine the state.
流量値の差分により器具の起動判別をおこなうので、すでに他の器具が作動している状態で、別の器具が起動してもその器具の起動判別を比較的容易に判別できるものである。
前記の構成において、差分による器具判別を行うため、瞬間的な器具のガス流量の変化を見るためには計測間隔は短い方が良い。しかしながらガス器具が使われていないときも常に高速でサンプリングするのは電池の消耗が激しくなるなどの課題がある。 In the above configuration, since the instrument is discriminated based on the difference, it is preferable that the measurement interval is short in order to see the instantaneous change in the gas flow rate of the instrument. However, even when the gas appliance is not used, sampling at a high speed always has problems such as exhaustion of the battery.
また、ガス流量の変動が大きくガス器具の使用状態が変化していなくても差分値が所定以上となって誤認識してしまう可能性がある。特に大流量器具使用中に小流量器具の起動を判別する場合、大流量器具の種類によっては定常運転時であっても、流量変化幅が大きく、小流量器具の起動流量変化値と大差なく、小流量器具の立ち上がりの判別が困難となる場合も想定されるという課題も有していた。 Moreover, even if the fluctuation of the gas flow rate is large and the usage state of the gas appliance is not changed, there is a possibility that the difference value becomes a predetermined value or more and is erroneously recognized. In particular, when determining the activation of a small flow device while using a large flow device, the flow rate change range is large depending on the type of the large flow device, even during steady operation, and there is not much difference from the startup flow rate change value of the small flow device. There is also a problem that it may be assumed that it is difficult to determine the rising of the small flow rate device.
本発明は、前記従来の課題を解決するもので、必要なときにサンプリング時間を早くし、電池の消耗を少なくするとともに、変動の大きい大流量器具使用時でも小流量器具の判別をより確実にする技術を提供することを目的とする。 The present invention solves the above-mentioned conventional problems, shortens the sampling time when necessary, reduces battery consumption, and more reliably discriminates small flow instruments even when using large flow instruments with large fluctuations. It aims at providing the technology to do.
前記従来の課題を解決するために、本発明のガスメータ装置は、家庭用ガス供給管に接
続され、ガス流量の測定間隔時間が変更可能な流量計測手段と、前記流量計測手段から出力される流量の差分値を求める演算手段と、前記演算手段で求めた流量の差分値を記憶する記憶手段と、前記演算手段により算出された差分値と前記記憶手段内に登録された比較判定値との大きさを比較し、使用されるガス器具を判別検知する判別手段と、ガス器具が始動されたと判断された場合前記流量計測手段の測定間隔時間を短く変更する制御手段を有し、前記制御手段は、前記記憶手段に予め登録されている特定のガス器具が使用中と判断された時のみ、測定間隔時間を短く変更する構成である。
In order to solve the conventional problems, the gas meter device of the present invention is connected to a household gas supply pipe.
A flow rate measurement unit that can change the measurement interval time of the gas flow rate, a calculation unit that calculates a difference value of the flow rate output from the flow rate measurement unit, and a memory that stores the difference value of the flow rate calculated by the calculation unit A means for comparing the difference value calculated by the computing means with the comparison judgment value registered in the storage means to discriminate and detect the gas appliance to be used, and the gas appliance is started. Control means for shortening the measurement interval time of the flow rate measurement means when it is determined that the control means is only when it is determined that a specific gas appliance pre-registered in the storage means is in use In this configuration , the measurement interval time is changed short.
本発明のガスメータ装置は、計測手段から出力される瞬時流量の計測間隔をガス器具使用時には、より時間間隔を短くすることで、常に高速サンプリングする必要がなく、無駄な電池の消耗を減らせるとともに、高速にサンプリングすることによりその流量データを平滑化処理したのちの差分値の変化でもってガス器具の使用状態の変化を判定することが可能となり、変化量の大きい給湯器のようなガスを大量に使用する機器の動作中であっても小流量機器の状態変化が計測される流量値の差分データで検知しやすくするものである。 In the gas meter device of the present invention, the measurement interval of the instantaneous flow rate output from the measuring means is shortened when the gas appliance is used, so that it is not always necessary to perform high-speed sampling, and wasteful battery consumption can be reduced. By sampling at high speed, it becomes possible to determine the change in the usage state of the gas appliance with the change in the difference value after smoothing the flow rate data, and a large amount of gas such as a water heater with a large change amount This makes it easy to detect the change in the state of the small flow rate device with the difference data of the flow rate values that are measured even during the operation of the device used.
第１の発明は、家庭用ガス供給管に接続され、ガス流量の測定間隔時間が変更可能な流量計測手段と、前記流量計測手段から出力される流量の差分値を求める演算手段と、前記演算手段で求めた流量の差分値を記憶する記憶手段と、前記演算手段により算出された差分値と前記記憶手段内に登録された比較判定値との大きさを比較し、使用されるガス器具を判別検知する判別手段と、ガス器具が始動されたと判断された場合前記流量計測手段の測定間隔時間を短く変更する制御手段を有し、前記制御手段は、前記記憶手段に予め登録されている特定のガス器具が使用中と判断された時のみ、測定間隔時間を短くすることにより、変化量の大きい給湯器のようなガスを大量に使用する機器の動作中であっても小流量機器の状態変化が計測される流量値の差分データで検知しやすくするものである。 According to a first aspect of the present invention, there is provided a flow rate measuring unit connected to a household gas supply pipe and capable of changing a measurement interval time of the gas flow rate, a calculation unit for obtaining a difference value between the flow rates output from the flow rate measuring unit, and the calculation A storage means for storing the difference value of the flow rate obtained by the means, the magnitude of the difference value calculated by the calculation means and the comparison judgment value registered in the storage means, and a gas appliance to be used A determination means for determining and detecting, and a control means for changing the measurement interval time of the flow rate measurement means to be short when it is determined that the gas appliance has been started, and the control means is pre-registered in the storage means Only when it is judged that the gas appliance is in use, the state of the small flow rate equipment is reduced even during operation of equipment that uses a large amount of gas, such as a water heater with a large amount of change, by shortening the measurement interval time. Changes are measured It is intended to facilitate detecting the difference data amount values.
第２の発明は、家庭用ガス供給管に接続され、ガス流量の測定間隔時間が変更可能な流量計測手段と、前記流量計測手段から出力される流量の差分値を求める演算手段と、前記演算手段で求めた流量の差分値を記憶する記憶手段と、前記演算手段により算出された差分値と前記記憶手段内に登録された比較判定値との大きさを比較し、使用されるガス器具を判別検知する判別手段と、ガス器具が始動されたと判断された場合前記流量計測手段の測定間隔時間を短く変更する制御手段を有し、前記制御手段は、ガス器具の使用開始が検知された時点よりガス器具起動時の流量変化の大きい時間は省いて、安定期に入ってから流量計測手段の計測間隔を短くする制御手段を有することで、ガス器具起動時の流量変化の大きい時間は省いて、安定期に入ってから計測時間を短くするため、より効率的に流量計測手段を動かすことができ、計測器を駆動する電池の容量も小さくできる。 According to a second aspect of the present invention, there is provided a flow rate measuring unit connected to a household gas supply pipe and capable of changing a measurement interval time of the gas flow rate, a calculation unit for obtaining a difference value of the flow rate output from the flow rate measuring unit, and the calculation A storage means for storing the difference value of the flow rate obtained by the means, the magnitude of the difference value calculated by the calculation means and the comparison judgment value registered in the storage means, and a gas appliance to be used Determining means for detecting and having a control means for changing the measurement interval time of the flow rate measuring means to be short when it is determined that the gas appliance has been started, and the control means detects when the start of use of the gas appliance is detected By omitting the time when the flow rate change is large when starting the gas appliance, and by having a control means to shorten the measurement interval of the flow rate measurement means after entering the stable period, save the time when the flow rate change when starting the gas appliance is large ,stable period To shorten the measurement time since the beginning, more efficiently can move the flow rate measuring means, the capacity of the battery for driving the instrument can be reduced.
（実施の形態１）
図１は、本発明の実施の形態１におけるガスメータ装置の構成を示すブロック図である。
(Embodiment 1)
FIG. 1 is a block diagram showing the configuration of the gas meter device according to Embodiment 1 of the present invention.
図１において、１はガスメータ装置であり、ガス供給管の途中に設けられ、その下流側の配管には各顧客宅内に設置された１台以上のガス器具が接続されている。 In FIG. 1, reference numeral 1 denotes a gas meter device, which is provided in the middle of a gas supply pipe, and one or more gas appliances installed in each customer's house are connected to the downstream pipe.
ガスメータ装置内部はガス管に接続されたガスの流路内に設けられたガス遮断弁２とガス流量計測手段３とガス流量計測手段３からの信号を演算処理して使用ガス流量を表示する表示部４、また地震などの振動を検出する感震器５、及び本発明に係わるガス器具判別を行うため、演算手段６、記憶手段７及び判別手段８と感震器５の作動や器具判断、保安
機能その他を統括制御処理する制御回路９及びそれらの動力源となる電池（図示せず）を内蔵している。
The inside of the gas meter device is a display for displaying the used gas flow rate by processing the signals from the gas cutoff valve 2, the gas flow rate measuring means 3 and the gas flow rate measuring means 3 provided in the gas flow path connected to the gas pipe. In order to determine the unit 4, the seismic device 5 for detecting vibrations such as earthquakes, and the gas appliance according to the present invention, the calculation means 6, the storage means 7, the discrimination means 8 and the operation of the seismic instrument 5 and the equipment judgment, A control circuit 9 that performs overall control processing of the safety function and the like and a battery (not shown) that serves as a power source for the control circuit 9 are incorporated.
記憶手段７には、流量変化が起こったかどうかの比較判定値が記録されている。記録されたデータを記憶保持する記憶手段は本発明では半導体メモリを使用しているが、記録の追加、書き換えができるものであれば、磁気記録媒体その他でも可能である。 The storage unit 7 records a comparative determination value as to whether or not a flow rate change has occurred. The storage means for storing and holding recorded data uses a semiconductor memory in the present invention. However, a magnetic recording medium or the like can be used as long as recording can be added or rewritten.
なお、本発明の流量計測手段３に関しては、超音波方式の計測手段を使用しているが、計測方式としては、他の流量計測方式でもフルイディック方式などの短時間に一定サイクルで連続計測可能であれば使用可能である。 In addition, regarding the flow rate measuring means 3 of the present invention, an ultrasonic type measuring means is used. However, as a measuring method, other flow rate measuring methods can be continuously measured in a constant cycle in a short time such as a fluidic method. Can be used.
以下、動作について説明する。 The operation will be described below.
まず超音波方式の流速計測に関して図２をもとに説明する。計測流路１０は矩形断面を持っており、計測流路１０のガスの流れる方向と直角方向にある壁面には計測流路１０を挟んで一対の超音波送受信器１１、１２が流路の上流側と下流側で角度φを有して斜めに対向して装着されている。超音波送受信器１１、１２間で交互に超音波を送受信させて流体の流れに対して順方向と逆方向の超音波の伝搬時間の差を一定間隔を置いて計り、伝搬時間差信号として出力する働きを持つ。この伝搬時間差信号を受けて計算手段（図示せず）により被計測流体の流速及び流量を算出するものである。 First, ultrasonic flow velocity measurement will be described with reference to FIG. The measurement channel 10 has a rectangular cross section, and a pair of ultrasonic transmitters / receivers 11 and 12 are located upstream of the channel with the measurement channel 10 sandwiched between walls perpendicular to the gas flow direction of the measurement channel 10. The side and the downstream side are mounted to face each other at an angle φ. Ultrasonic waves are alternately transmitted and received between the ultrasonic transmitters / receivers 11 and 12, and the difference between the propagation times of the ultrasonic waves in the forward direction and the reverse direction with respect to the flow of the fluid is measured at regular intervals, and output as a propagation time difference signal. Have a job. In response to this propagation time difference signal, the calculation means (not shown) calculates the flow velocity and flow rate of the fluid to be measured.
演算式を下記に示す。 The calculation formula is shown below.
図２においてＬは測定距離であり、ｔ１を上流からの伝達時間、ｔ２を下流からの伝達時間、Ｃを音速とすると、流速Ｖは
（式１） Ｖ＝Ｌ／２ｃｏｓφ（（１／ｔ１）−（１／ｔ２））
計測の時間間隔は超音波の送受信が可能な範囲で設定できる。ガス器具により起動や制御により変化する時間が器具ごとに異なるため、測定時間間隔を小さくすることは器具判別を瞬時に行う点では有利となるが、計測間隔を短くすると電池の消耗が大きくなるなどの課題がある、また計測時間を従来のガスメータで使用している膜式方式と同等の計測間隔が２桁オーダーの秒数間隔になると、本発明のアルゴリズムの流量変化の差分を見て判断することが困難になる。本発明の実施例では後述するように、通常ガス器具が使われていない時は２秒間隔の計測を行い、その差分値をとりガス器具の起動を判別し、ガス器具起動後は測定間隔時間を短くする制御を行っている。なお更に時間間隔を小さくすることも可能である。
In FIG. 2, L is a measurement distance, where t1 is the transmission time from the upstream, t2 is the transmission time from the downstream, and C is the velocity of sound, the flow velocity V is (Equation 1) V = L / 2 cos φ ((1 / t1) -(1 / t2))
The measurement time interval can be set within a range where ultrasonic waves can be transmitted and received. Since the time to change by activation and control differs depending on the gas appliance, reducing the measurement time interval is advantageous in terms of instantaneous instrument discrimination, but shortening the measurement interval increases battery consumption. When the measurement interval equivalent to the membrane method used in the conventional gas meter is a two-digit order interval, it is judged by looking at the difference in flow rate change of the algorithm of the present invention. It becomes difficult. In the embodiment of the present invention, as will be described later, when the gas appliance is not normally used, the measurement is performed at intervals of 2 seconds, the difference value is taken to determine the activation of the gas appliance, and the measurement interval time after the gas appliance is activated. Control to shorten the time. It is possible to further reduce the time interval.
次に、ガス器具の動作状態の判別手順について図３をもとに説明する。 Next, the procedure for determining the operating state of the gas appliance will be described with reference to FIG.
ガスメータ装置では上記した様に２秒間隔毎にガス流量を計測し、そのデータを演算手段に送り流量値を微分して２秒毎の流量の差分データとして出力している。 In the gas meter device, as described above, the gas flow rate is measured every 2 seconds, the data is sent to the calculation means, and the flow rate value is differentiated and output as the difference data of the flow rate every 2 seconds.
この差分データは逐次判別手段に送られ、記憶手段に登録されている比較判定値との比較を行っている。差分値が比較判定値を超えた場合、ガス器具が起動した判断する。 This difference data is sequentially sent to the discrimination means and compared with the comparison judgment value registered in the storage means. When the difference value exceeds the comparison determination value, it is determined that the gas appliance has been activated.
図４に実際のガス器具使用時のガス流量の変化と差分値の変化を示す。 FIG. 4 shows changes in the gas flow rate and changes in the difference value when an actual gas appliance is used.
図４のグラフにおいて実線が流量計測手段により測定されたガスの流量値と破線がそのときの微分値、すなわち、２秒毎の差分値を示す。ガス器具の起動時には差分値はプラス側にピークを持って表現され、停止時にはマイナス側にピークをもって表現される。 In the graph of FIG. 4, the solid line indicates the gas flow rate value measured by the flow rate measuring means and the broken line indicates the differential value at that time, that is, the difference value every 2 seconds. The difference value is expressed with a peak on the plus side when the gas appliance is started, and is expressed with a peak on the minus side when the gas appliance is stopped.
なお、図５に３つの器具（Ａ．Ｂ．Ｃ）を同時に使用した時の流量値と差分値をグラフに示すが、３つの器具の起動時と停止時の変化を読み取ることが確認できる。 In addition, although the flow rate value and difference value at the time of using three apparatuses (ABC) simultaneously in FIG. 5 are shown on a graph, it can confirm that the change at the time of starting and a stop of three apparatuses is read.
上記したように本手法は、器具の起動、停止を判断するのに有効な手段であるが、大流量のガス機器使用時に小流量のガス機器が起動する場合は、その流量差の違いが大きいので大流量ガス機器の使用流量変動が小流量ガス機器の使用流量と同等の場合があり、その時は大流用ガス機器の変動を小流量ガス機器の作動と判断してしまう可能性があるため、差分による比較判定値の閾値を大流用ガス機器の変動幅より大きくとる必要があるが、その場合は起動が判定できない小流量ガス機器がでてくる可能性が大きくなる。それを防ぐためには大流量ガス機器の変動成分を取り除くことで、差分による判別が効果的に行える。本発明はそのための流量値の不要変動分を平滑処理するものであるが、ただ単に出力された流量値を平均化して差分を行うと器具の起動時の流量変化も鈍ってしまうため、差分による判別が難しくなる。 As described above, this method is an effective means for determining the start and stop of the instrument, but when a small flow gas device is activated when using a large flow gas device, the difference in the flow rate is large. Therefore, there may be a case where the flow rate change of the large flow rate gas device is equivalent to the flow rate of the small flow rate gas device, and at that time, the change of the large flow rate gas device may be judged as the operation of the small flow rate gas device. Although it is necessary to set the threshold value of the comparison determination value based on the difference to be larger than the fluctuation range of the large-flow gas device, there is a high possibility that a small-flow gas device that cannot be determined to start will appear. In order to prevent this, the difference component can be effectively determined by removing the fluctuation component of the large flow rate gas equipment. Although the present invention smoothes the undesired fluctuations of the flow value for that purpose, the flow rate change at the start-up of the instrument also becomes dull when the difference is made by simply averaging the output flow value. Discrimination becomes difficult.
本発明の平滑処理の動作の実施例について図６をもとに説明する。 An embodiment of the smoothing operation of the present invention will be described with reference to FIG.
本発明の実施例では通常は２秒おきに流量計測を行っているが、その差分データにより前記したように器具が起動したと判別されたときは、０．２秒置きの流量計測に切り替わる。ガス給湯器などは、図７に示すようにコンマ数秒単位で弁を駆動して細かな流量制御を行っているため０．２秒間隔で流量計測を行った場合、通常計測している２秒間の間にも実際には幾つもの波形の山谷ができている。ただし前述したように起動するガス器具の種別を見るのには２秒毎の差分データで把握できるため、この高速サンプリングした場合２秒間の中にあるデータを平滑処理した後の２秒毎のデータを抽出することで２秒間隔で流量計測したデータに比較して、図８に示すように細かな弁制御による流量の変化を平滑除去できるため、給湯器の流量変化分に埋もれてしまう可能性のある小流量ガス機器の起動変化がこの平滑処理により機種の特定が容易になる。 In the embodiment of the present invention, the flow rate measurement is normally performed every 2 seconds, but when it is determined that the instrument has been activated as described above based on the difference data, the flow rate measurement is switched every 0.2 seconds. As shown in FIG. 7, the gas water heater or the like drives the valve in units of a few seconds, and performs fine flow rate control. Therefore, when the flow rate is measured at intervals of 0.2 seconds, the normal measurement is performed for 2 seconds. There are actually several corrugated peaks and valleys in between. However, as described above, since it is possible to grasp the type of gas appliance to be activated from the difference data every 2 seconds, the data every 2 seconds after smoothing the data in 2 seconds when this high-speed sampling is performed As shown in FIG. 8, the change in flow rate due to fine valve control can be removed smoothly as compared to the data measured at intervals of 2 seconds by extracting the value, so that it may be buried in the flow rate change of the water heater This smoothing process makes it easy to specify the model of the start-up change of a small flow rate gas device.
なお、平滑処理の方法としては、図９に示すように０．２秒毎の時系列流量データＱｎ１０個を平均して２秒毎のデータＱＡｎとして使うことも可能であるし、図１０に示すようにグラフ中の単位期間内のデータの中から大きいものと小さい物を所定個づつ間引いて図１０の下のグラフのように使うという手段でも可能である。あるいは両者を組み合わせた形のものでも可能である。 As a smoothing method, as shown in FIG. 9, it is possible to average 10 time-series flow rate data Qn every 0.2 seconds and use it as data Q An every 2 seconds. As shown in the graph, it is also possible to use a method of thinning out large and small items from the data in a unit period in a predetermined period and using them as shown in the lower graph of FIG. Or the thing of the form which combined both is also possible.
なお、前記したように判別に用いる比較判定値により器具の状態変化の判別を行っているが起動している器具によってその流量値のばらつきが異なる。本発明の実施例による比較判定値はこの機種の違いによる流量ばらつきを考慮して決定しているが、判別された機種により、予め機種ごとに指定された値にこの比較判定値を変更することで、起動しているガス器具の流量変動に合わせて最適化できるので、誤判別する可能性をより少なくできる。 Note that as described above, the change in the state of the appliance is determined based on the comparison determination value used for the determination, but the variation in the flow rate value varies depending on the activated appliance. The comparison determination value according to the embodiment of the present invention is determined in consideration of the flow rate variation due to the difference between the models, but the comparison determination value is changed to a value specified in advance for each model depending on the determined model. Thus, since it can be optimized in accordance with the flow rate fluctuation of the activated gas appliance, the possibility of misjudgment can be reduced.
また、流量計測手段の計測間隔を変えることで、器具の状態変化による差分値の大きさがかわるため、予め複数の比較判定値を用意しておき、流量計測手段の計測間隔の変更に対応して比較判定値を変更することで、計測時間の変更により、判別の誤認をすることを極力少なくすることができる。 In addition, changing the measurement interval of the flow rate measuring means changes the magnitude of the difference value due to the change in the state of the instrument.Therefore, a plurality of comparison judgment values are prepared in advance to cope with changes in the measurement interval of the flow rate measuring means. By changing the comparison determination value, it is possible to minimize misidentification of determination due to a change in measurement time.
以上のように、本発明にかかるガスメータ装置は、家庭用ガス供給管に接続され、ガス流量の測定間隔時間が変更可能な流量計測手段と流量計測手段から出力される流量値の差分値を求める演算手段と記憶手段と演算手段により算出された差分値と記憶手段内に登録された比較判定値との大きさを比較し、ガス器具の使用されるガス器具を判別検知する判
別手段とガス器具が始動されたと判断された場合流量計測手段の測定間隔時間を短く変更する制御手段を有する構成である。
As described above, the gas meter device according to the present invention obtains the difference value between the flow rate value output from the flow rate measurement unit and the flow rate measurement unit that is connected to the household gas supply pipe and can change the measurement interval time of the gas flow rate. Discriminating means and gas appliance for comparing the magnitude of the difference value calculated by the arithmetic means, the storage means, and the arithmetic means with the comparison judgment value registered in the storage means to discriminate and detect the gas appliance used by the gas appliance When it is determined that the engine is started, it has a control means for changing the measurement interval time of the flow rate measuring means to be short.
計測手段から出力される瞬時流量の計測間隔をガス器具使用時には、より時間間隔を短くすることで、常に高速サンプリングする必要がなく、無駄な電池の消耗を減らせるとともに、高速にサンプリングすることによりその流量データを平滑化処理したのちの差分値の変化でもってガス器具の使用状態の変化を判定することが可能となり、変化量の大きい給湯器のようなガスを大量に使用する機器の動作中であっても小流量機器の状態変化が計測される流量値の差分データで検知しやすくするものである。 When using a gas appliance, the measurement interval of the instantaneous flow rate output from the measuring means can be shortened so that there is no need to always perform high-speed sampling, reducing wasteful battery consumption and sampling at high speed. It is possible to determine the change in the usage state of the gas appliance by the change in the difference value after smoothing the flow rate data, and during operation of equipment that uses a large amount of gas such as a water heater with a large change amount Even so, the change in the state of the small flow rate device is easily detected by the difference data of the flow rate values.
１ ガスメータ装置
２ ガス遮断弁
３ 流量計測手段
４ 表示部
５ 感震器
６ 演算手段
７ 記憶手段
８ 判別手段
９ 制御回路
１０ 計測流路
１１，１２ 超音波送受信器
DESCRIPTION OF SYMBOLS 1 Gas meter apparatus 2 Gas shut-off valve 3 Flow rate measuring means 4 Display part 5 Seismic device 6 Calculation means 7 Storage means 8 Discriminating means 9 Control circuit 10 Measurement flow path 11, 12 Ultrasonic transmitter / receiver
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| JP2002062176A (en) * | 2000-08-21 | 2002-02-28 | Tokyo Gas Co Ltd | Gas meter and method for deciding abnormality regarding gas supply |
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| JP3632396B2 (en) * | 1997-09-19 | 2005-03-23 | 松下電器産業株式会社 | Flow measuring device |
| JPH11108729A (en) * | 1997-09-30 | 1999-04-23 | Yazaki Corp | Gas amount measuring device |
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| JP2002062176A (en) * | 2000-08-21 | 2002-02-28 | Tokyo Gas Co Ltd | Gas meter and method for deciding abnormality regarding gas supply |
| JP2002098567A (en) * | 2000-09-21 | 2002-04-05 | Tokyo Gas Co Ltd | Abnormality detection method for gas meter and gas supply |
| JP2003194331A (en) * | 2001-12-27 | 2003-07-09 | Tokyo Gas Co Ltd | Gas apparatus evaluation unit and gas meter having gas apparatus evaluation function |
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