JP4930001B2 - Gas meter device - Google Patents

Gas meter device Download PDF

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JP4930001B2
JP4930001B2 JP2006311170A JP2006311170A JP4930001B2 JP 4930001 B2 JP4930001 B2 JP 4930001B2 JP 2006311170 A JP2006311170 A JP 2006311170A JP 2006311170 A JP2006311170 A JP 2006311170A JP 4930001 B2 JP4930001 B2 JP 4930001B2
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flow rate
value
discriminating
determination
appliance
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JP2008128701A (en
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陽一 伊藤
康裕 梅景
肇 宮田
健一 賀門
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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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ガスメータ装置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 gas meter device 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12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12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、ガス器具の特定判断が曖昧であり、特定ガス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, in this method, the specific determination of the gas appliance is ambiguous, and it is difficult to make a convenient and easy-to-understand rate setting such as charging a fee for the specific gas 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、ガス器具の判別とそのガス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 comparison change value of each gas appliance registered in the storage means, and determines the gas appliance and its gas. Determine the state of the appliance.

流量値の差分によりガス器具の起動判別を行うので、すでに他のガス器具が作動している状態で、別のガス器具が起動してもそのガス器具の起動判別を比較的容易に判別できるものである。
特開2002−71421号公報
Since the activation of a gas appliance is determined based on the difference in flow rate values, it is possible to determine the activation of a gas appliance relatively easily even if another gas appliance is activated while another gas appliance is already operating. It is.
JP 2002-71421 A

前記の構成において、例えば給湯器のような起動時直後の流量変動の大きいガス器具が立ち上がった場合、起動後しばらくは連続的に所定以上の差分値データが発生してしまうため、その変動を別器具の起動と誤検知する可能性を有すという課題がある。   In the above configuration, for example, when a gas appliance having a large flow rate fluctuation immediately after startup, such as a water heater, is started, differential value data of a predetermined value or more is continuously generated for a while after startup. There is a problem that there is a possibility of erroneous detection when the instrument is activated.

本発明は、前記従来の課題を解決するもので、ガス器具起動直後のガス流量が安定しないときに発生する差分データで誤検知することをなくし、変動の大きい大流量器具使用時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, eliminates erroneous detection with differential data generated when the gas flow rate immediately after starting the gas appliance is not stable, and makes it possible to discriminate when using a large flow appliance with large fluctuations. The purpose is to provide technology to ensure.

前記従来の課題を解決するために、本発明の流量計測装置は、流路に流れる流体の流量を所定時間間隔で計測する流量計測手段と、前記流量計測手段から出力される流体の流量の差分値を求める演算手段と、起動初期の使用流量の変動が大きい器具を判別するための変動判定値と使用された器具を判別する比較判定値と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の比較判定値との大きさを比較し使用される器具を判別検知する判別手段と、前記判別手段により器具が始動されたと判断された、差分値の絶対値が所定回数連続して前記記憶手段の変動判定値以下であればその後の前記判別手段の器具判別を行い、差分値の絶対値が変動判定値以下にならなければその後の前記判別手段の器具判別動作を所定時間停止する制御手段を有する構成である。 In order to solve the above-described conventional problems, a flow rate measurement device according to the present invention includes a flow rate measurement unit that measures a flow rate of a fluid flowing through a flow path at predetermined time intervals, and a difference between the flow rates of fluids output from the flow rate measurement unit. Calculated by the calculation means, a storage means for storing a fluctuation judgment value for discriminating an appliance having a large fluctuation in the used flow rate at the initial stage of startup, and a comparison judgment value for discriminating a used instrument. a difference value and discriminating means for discriminating detection compared to instruments used the magnitude of the comparison judgment value of said storage means is, after it is determined that the instrument has been started by the determination means, the absolute value of the difference value If it is less than or equal to the fluctuation determination value of the storage means continuously for a predetermined number of times, then the appliance discrimination of the discrimination means is performed, and if the absolute value of the difference value is not less than or equal to the fluctuation determination value, the appliance discrimination operation of the discrimination means thereafter The predetermined During a configuration having a control means for stopping.

本発明のガスメータ装置は、ガス器具の起動判別が行われた際、起動時直後に起こりやすい流量変動から発生する流量の差分値により、別器具の起動と誤検知することを防止するため起動後の流量変動が安定しているならばそのまま次の判別動作を行うが、安定していなければ流量変動が安定するまで一定期間、次の判別動作を一時的に停止し、誤検知が無いようにするものである。   The gas meter device of the present invention has a post-startup to prevent erroneous detection of the start of another instrument due to the difference value of the flow rate generated from the flow rate fluctuation that is likely to occur immediately after the start-up when the gas appliance start-up determination is performed. If the flow rate fluctuation is stable, the next discrimination operation is performed as it is.If the flow rate fluctuation is not stable, the next discrimination operation is temporarily stopped for a certain period until the flow rate fluctuation is stabilized, so that there is no false detection. To do.

第1の発明は、流路に流れる流体の流量を所定時間間隔で計測する流量計測手段と、前記流量計測手段から出力される流体の流量の差分値を求める演算手段と、起動初期の使用流量の変動が大きい器具を判別するための変動判定値と使用された器具を判別する比較判定値と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の比較判定値との大きさを比較し使用される器具を判別検知する判別手段と、前記判別手段により器具が始動されたと判断された、差分値の絶対値が所定回数連続して前記記憶手段の変動判定値以下であればその後の前記判別手段の器具判別を行い、差分値の絶対値が変動判定値以下にならなければその後の前記判別手段の器具判別動作を所定時間停止する制御手段を有する構成で、器具の起動判別が行われた際、起動直後に起こりやすい流量変動から発生する流量の差分値により、別器具の起動と誤検知することを防止するため起動後の流量変動が安定しているならばそのまま次の判別動作を行うが、安定していなければ流量変動が安定するまで一定期間、次の判別動作を一時的に停止し、誤検知が無いようにするものである。 According to a first aspect of the present invention, there is provided a flow rate measuring means for measuring a flow rate of a fluid flowing in a flow path at predetermined time intervals, a calculation means for obtaining a difference value of the flow rate of the fluid output from the flow rate measuring means, and an initial use flow rate Storage means for storing a fluctuation judgment value for discriminating a device having a large fluctuation and a comparison judgment value for discriminating a used instrument, a difference value calculated by the computing means, and a comparison judgment value of the storage means and discriminating means for detecting the appliance to be compared with the size used determined the after it is determined that the instrument has been started by the discriminating means, the variation determination value of the storage means the absolute value of the difference value consecutively a predetermined number of times If it is below, it performs appliance discrimination of the discrimination means thereafter, and if the absolute value of the difference value is not less than the fluctuation judgment value, it has a control means for stopping the appliance discrimination operation of the discrimination means thereafter for a predetermined time, Instrument In order to prevent false detection of activation of another instrument due to the difference value of the flow rate generated from the flow rate fluctuation that is likely to occur immediately after startup when the movement is determined, if the flow rate fluctuation after startup is stable The next discriminating operation is performed. If it is not stable, the next discriminating operation is temporarily stopped for a certain period until the flow rate fluctuation is stabilized, so that no erroneous detection is caused.

第2の発明は、特に、第1の発明の制御手段において、判別された器具に対応して停止時間を変更する機能を有することにより、起動した器具に対応した判別停止時間が設定できるので停止時間の設定を必要最小限にすることができる。   In the second invention, in particular, the control means of the first invention has a function of changing the stop time corresponding to the discriminated appliance, so that the discriminating stop time corresponding to the activated appliance can be set, so that the stop is stopped. Time setting can be minimized.

第3の発明は、特に、第1または2の発明において、前記判別手段は、器具の停止判別機能を有し、前記制御手段は、前記停止判別機能により器具が停止したと判別されるまでは他の器具の判別を停止することで、特に起動後流量変化の多い装置使用時は他器具の判別According to a third aspect of the invention, in particular, in the first or second aspect of the invention, the determination unit has an instrument stop determination function, and the control unit determines that the instrument has been stopped by the stop determination function. By stopping the discrimination of other instruments, especially when using devices with a large flow rate change after startup
機能を停止することで、不要な誤検知を無くすことができる。By stopping the function, unnecessary false detection can be eliminated.

第4の発明は、特に、第1または2の発明において、前記所定時間内であっても差分値の絶対値が所定回数連続して所定値以下になった場合は、器具判別の停止を解除して器具判別を再開することで、判別動作の停止時間を必要最小限にすることができる。In the fourth invention, in particular, in the first or second invention, when the absolute value of the difference value is not more than the predetermined value continuously for the predetermined number of times even within the predetermined time, the stop of the instrument discrimination is canceled. Then, by restarting the instrument discrimination, the stop time of the discrimination operation can be minimized.

第5の発明は、流路に流れる流体の流量を所定時間間隔で計測する流量計測手段と、前記流量計測手段から出力される流体の流量の差分値を求める演算手段と、起動初期の使用流量の変動が大きい器具を判別するための変動判定値と使用された器具を判別する比較判定値と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の比較判定値との大きさを比較し使用される器具を判別検知する判別手段と、前記判別手段により器具が始動されたと判断された後、差分値の絶対値が所定回数連続して前記記憶手段の変動判定値以下であればその後の前記判別手段の器具判別を行い、差分値の絶対値が変動判定値以下にならなければ、その後の差分値の絶対値が所定回数連続して所定値以下になるまで、その後の前記判別手段の器具判別動作を停止する制御手段を有することにより、判別した器具に関係無く、起動した器具に対応した判別停止を自動的に対応することができる。According to a fifth aspect of the present invention, there is provided a flow rate measuring means for measuring the flow rate of the fluid flowing in the flow path at predetermined time intervals, a calculation means for obtaining a difference value of the flow rate of the fluid output from the flow rate measuring means, Storage means for storing a fluctuation judgment value for discriminating a device having a large fluctuation and a comparison judgment value for discriminating a used instrument, a difference value calculated by the computing means, and a comparison judgment value of the storage means A discriminating means for discriminating and detecting the appliance to be used by comparing the magnitudes of the discriminating means, and after the discriminating means judges that the appliance has been started, the absolute value of the difference value continues for a predetermined number of times. If it is below, appliance determination of the subsequent determination means, if the absolute value of the difference value is not less than or equal to the fluctuation determination value, until the absolute value of the subsequent difference value is continuously below the predetermined value a predetermined number of times, Subsequent discriminator By having a control means for stopping the appliance determination operation, regardless of the discriminated instrument can be automatically corresponding discrimination stop that corresponds to the start and instruments.

第6の発明は、特に、第1〜5のいずれか1つの発明の流量計測手段が超音波流量計を用いることで、計測時間を一定時間間隔で測定できる。さらには超音波の送受信の制御を変えることで測定時間間隔を変えることも容易に実現できる。   In the sixth aspect of the invention, in particular, the flow rate measuring means according to any one of the first to fifth aspects of the invention uses an ultrasonic flowmeter, so that the measurement time can be measured at regular time intervals. Furthermore, it is possible to easily change the measurement time interval by changing the control of ultrasonic transmission / reception.

(実施の形態1)
図1は、本発明の実施の形態におけるガスメータ装置の構成を示すものである。
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。
(Embodiment 1)
FIG. 1 shows a configuration of a gas meter device according to an embodiment of the present invention.
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、及び本発明に係るガス器具判別を行うため、流量計測手段からの所定時間(例えば2秒間隔)ごとに今回計測流量と前回計測流量との差分値を求める演算手段6、起動初期の使用ガス流量の変動が大きいガス器具を判別するための変動判定値と使用されたガス器具を判別する比較判定値とを記憶する記憶手段7及びガス器具の使用開始,使用停止及び使用器具の判別を行う判別手段8、感震器5の作動や保安機能その他を統括制御処理する制御手段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。   In the gas meter device, a gas shutoff valve 2, a gas flow rate measuring means 3 and a signal from the gas flow rate measuring means 3 provided in a gas flow path connected to a gas pipe are processed to display the used gas flow rate. The current measurement flow rate and the previous measurement flow rate at predetermined time intervals (for example, every 2 seconds) from the flow rate measuring means in order to perform the gas appliance discrimination according to the present invention and the seismic device 5 that detects vibration such as an earthquake. And a storage means 7 for storing a fluctuation judgment value for discriminating a gas appliance having a large fluctuation in the used gas flow rate at the beginning of startup and a comparison judgment value for discriminating the used gas appliance. Discriminating means 8 for starting / stopping use of gas appliances and discriminating the appliances used, control means 9 for comprehensively controlling the operation and safety functions of the seismic sensor 5, and a battery (not shown) serving as a power source thereof Built-in

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、他の瞬時流量計測方式でもフルディック方式、熱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。   The flow rate measurement means 3 of the present invention uses ultrasonic measurement means. However, as the measurement method, other instantaneous flow rate measurement methods such as a full dick method, a thermal method, etc. can be performed at a constant cycle in a short time. If continuous measurement is possible, it 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。演算式を下記に示す。   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. 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ガス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。本発明の実施の形態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 the measurement distance, t1 is the transmission time from the upstream, t2 is the transmission time from the downstream, and C is the speed of sound. The flow velocity V is expressed by the equation (1) V = L / 2 cosφ ((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 that changes depending on the gas appliance depending on the activation and control differs depending on the gas appliance, reducing the measurement time interval is advantageous in that the appliance discrimination is performed instantaneously, but shortening the measurement interval increases battery consumption. When the measurement interval equivalent to the membrane method used in the conventional gas meter is equal to the number of seconds on the order of two digits, it is judged by looking at the difference in flow rate change of the algorithm of the present invention. It becomes difficult to do. In the embodiment of the present invention, as will be described later, when a gas appliance is not normally used, measurement is performed at intervals of 2 seconds, and the difference value is taken to determine the activation of the gas appliance. 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8に送られ、記憶手段7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と判断し、その状態を記憶手段7に登録する。さらにガス器具が停止した場合には、負の値の差分値が発生し、起動を登録されているガス器具の停止の比較判定値に一致する場合、動作していたガス器具が停止したと判断する。   This difference data is sent to the sequential determination means 8 and compared with the comparison determination value registered in the storage means 7. When the difference value exceeds the comparison determination value, it is determined that the gas appliance has been activated, and the state is registered in the storage unit 7. Furthermore, when the gas appliance is stopped, a negative difference value is generated, and if it matches the comparison judgment value of the stop of the registered gas appliance, it is determined that the operating gas appliance has stopped. To do.

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3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 3 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.

上記したように本手法は、ガス器具の起動、停止を判断するのに有効な手段であるが、例えば図5に示すように給湯器のような大流量で起動初期のガス流量の変動振幅が大きくそれが安定するまで所定時間かかる場合は、その変動振幅の差分値が図6に示すように判別のための比較判定値を超えてしまい、器具判別の誤検知となる場合がある。   As described above, this method is an effective means for determining the start and stop of the gas appliance. For example, as shown in FIG. If it takes a predetermined time until it is largely stabilized, the difference value of the fluctuation amplitude exceeds the comparison determination value for determination as shown in FIG.

そのため本発明の実施の形態では、図7に示すように差分データにより前記したようにガス器具が起動したと判別された時には、流量の差分値の絶対値が所定回数連続して所定値以下になる場合は起動後の流量変動は安定していると判断してそのまま続いて次の判別動作を行うが、給湯器のように流量変動が大きく、差分値の絶対値が所定回数連続して所定の変動判定値以下にならないような場合には、予め記憶手段7内に設定保持された流量変動が安定するまでのマージン分の停止時間だけ判別するロジックを停止するように制御されており、給湯器のように流量変動が大きいガス器具の起動初期の流量変動の振幅により発生する差分データを他のガス器具と誤検知することを防止している。なお、連続して所定値以下になる回数については装置に対応して変えることは可能である。   Therefore, in the embodiment of the present invention, as shown in FIG. 7, when it is determined by the difference data that the gas appliance has been activated as described above, the absolute value of the difference value of the flow rate is continuously less than the predetermined value a predetermined number of times. In this case, it is determined that the flow rate fluctuation after startup is stable, and the next discrimination operation is performed as it is, but the flow rate fluctuation is large as in a water heater, and the absolute value of the difference value is predetermined a predetermined number of times continuously. Is controlled to stop the logic for discriminating only the stop time for the margin until the flow rate fluctuation set and stored in the storage means 7 in advance is stabilized. Thus, it is possible to prevent erroneous detection of differential data generated by the amplitude of the flow rate fluctuation at the initial stage of startup of a gas appliance having a large flow rate variation such as a vessel. It should be noted that the number of times of continuously falling below the predetermined value can be changed according to the apparatus.

また、給湯器のように流量変動が大きいガス器具以外のガス器具においても起動時の初期流量は不安定になりやすいため、停止マージンを設けることは有効な手段であるが、ガス器具により安定するまでの時間が異なる。そこで、図8に示すように判別されたガス器具に対応した停止時間を予め記憶手段7に保持しておき、判別されたガス器具に対応した停止時間を使用することで、判別動作の停止時間を必要最小限にすることができる。   Also, in gas appliances other than gas appliances with large flow fluctuations such as water heaters, the initial flow rate at start-up tends to become unstable, so it is effective means to provide a stop margin, but it is stabilized by gas appliances The time until is different. Therefore, as shown in FIG. 8, the stop time corresponding to the determined gas appliance is held in the storage means 7 in advance, and the stop time corresponding to the determined gas appliance is used, so that the stop time of the determination operation is Can be minimized.

また、図9に示すようにガス器具が判別された後、求められた差分値が連続して所定回数、変動判定値以下になるまで、器具判別をしない制御とすることで、停止時間を予め設定しなくても自動的に起動初期流量が安定するまでの時間、判別を停止するようにすることが可能である。なお、連続して比較判定値以下になる回数については装置に対応して変えることは可能である。   In addition, after the gas appliance is determined as shown in FIG. 9, the stop time is set in advance by controlling so that the appliance is not discriminated until the obtained difference value is continuously a predetermined number of times or less than the fluctuation determination value. Even if it is not set, it is possible to automatically stop the determination until the startup initial flow rate is stabilized. It should be noted that the number of times that the value continuously falls below the comparison determination value can be changed according to the apparatus.

なお、図10に示すように、判別手段8は停止判断機能も有するため、給湯器のように比較的燃焼が安定時においても使用ガス流量値の変動は大きく、比較判定値を小さく設定するとこの変動による差分値データを他のガス器具の変化と判定してしまう可能性もわずかではあるが想定されるそのために、給湯器の起動が判定されてから停止が判定されるまでは、他のガス器具の起動判定を停止する制御とすることでその誤検知を防止することができる。   As shown in FIG. 10, since the determination means 8 also has a stop determination function, even when the combustion is relatively stable like a water heater, the variation in the used gas flow rate value is large. It is assumed that there is a slight possibility that the difference value data due to fluctuations will be determined as a change in other gas appliances. The misdetection can be prevented by setting the control to stop the activation determination of the appliance.

また、図11に示すように器具判別の停止時間中であっても差分値の絶対値が所定回数連続して所定の変動判定値以下になった場合は、器具判別動作の停止を解除して器具判別動作を再開する制御とすることで、判別動作の停止時間を必要最小限にすることができる。なお、判別停止するかどうかを判断するための変動判定値と、判別停止を解除するかどうかを判断するための変動判定値については個別に設定することは可能である。   In addition, as shown in FIG. 11, when the absolute value of the difference value is not more than a predetermined fluctuation determination value continuously for a predetermined number of times even during the apparatus determination stop time, the stop of the apparatus determination operation is canceled. By using the control for restarting the appliance discrimination operation, the stop time of the discrimination operation can be minimized. Note that it is possible to individually set a fluctuation determination value for determining whether or not to stop discrimination and a fluctuation determination value for determining whether or not to cancel the discrimination stop.

以上のように、本発明にかかるガスメータ装置は、使用されているガス器具を精度よく判別できるので、使用器具の使い方に合わせた新料金体系の適用やサービス提供以外にも、継続して使用できる時間等使用されているガス器具に適する安全基準を設定できる。   As described above, since the gas meter device according to the present invention can accurately determine the gas appliance being used, it can be used continuously in addition to applying a new fee system and providing services according to the usage of the appliance. It is possible to set safety standards suitable for gas appliances used such as time.

本発明の実施の形態におけるガスメータ装置の構成図The block diagram of the gas meter apparatus in embodiment of this invention 本発明の実施の形態における流量計測部構成図Configuration diagram of flow rate measurement unit in an embodiment of the present invention 本発明の実施の形態における判別動作の流れ図Flow chart of discrimination operation in the embodiment of the present invention 本発明の実施の形態における流量及び演算値の特性図Characteristics of flow rate and calculated value in the embodiment of the present invention 本発明の実施の形態における流量の特性図Flow characteristic chart in the embodiment of the present invention 本発明の実施の形態における流量の差分演算値の特性図The characteristic figure of the flow difference calculation value in an embodiment of the invention 本発明の実施の形態における判別停止の流れ図Flowchart for stopping discrimination in the embodiment of the present invention 本発明の実施の形態における判別停止の流れ図Flowchart for stopping discrimination in the embodiment of the present invention 本発明の実施の形態における判別停止の流れ図Flowchart for stopping discrimination in the embodiment of the present invention 本発明の実施の形態における判別停止の流れ図Flowchart for stopping discrimination in the embodiment of the present invention 本発明の実施の形態における判別停止の流れ図Flowchart for stopping discrimination in the embodiment of the present invention 従来のガスメータ装置の判別方法概念図Discrimination method conceptual diagram of a conventional gas meter device

符号の説明Explanation of symbols

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 制御手段
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 measurement means 4 Display part 5 Seismic device 6 Calculation means 7 Storage means 8 Discriminating means 9 Control means 10 Measurement flow path 11,12 Ultrasonic transmitter / receiver

Claims (6)

流路に流れる流体の流量を所定時間間隔で計測する流量計測手段と、
前記流量計測手段から出力される流体の流量の差分値を求める演算手段と、
起動初期の使用流量の変動が大きい器具を判別するための変動判定値と使用された器具を判別する比較判定値と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の比較判定値との大きさを比較し使用される器具を判別検知する判別手段と、
前記判別手段により器具が始動されたと判断された、差分値の絶対値が所定回数連続して前記記憶手段の変動判定値以下であればその後の前記判別手段の器具判別を行い、差分値の絶対値が変動判定値以下にならなければその後の前記判別手段の器具判別動作を所定時間停止する制御手段を有する流量計測装置。
Flow rate measuring means for measuring the flow rate of the fluid flowing in the flow path at predetermined time intervals;
A calculating means for obtaining a difference value of the flow rate of the fluid output from the flow rate measuring means;
Storage means for storing a variation judgment value for discriminating an appliance having a large fluctuation in the use flow rate at the initial stage of startup and a comparison judgment value for discriminating a used appliance;
A discriminating means for discriminating and detecting an instrument to be used by comparing the magnitude of the difference value calculated by the computing means and the comparison judgment value of the storage means;
After it is determined that the instrument has been started by the determination means, the difference value absolute value performs appliance determination of subsequent said discriminating means not more than the variation determination value of the storage means and predetermined number of times consecutively, the difference value A flow rate measuring device having a control means for stopping a subsequent appliance discriminating operation of the discriminating means for a predetermined time if the absolute value is not less than or equal to the fluctuation judgment value.
前記制御手段は、判別された器具に対応して停止時間を変更する請求項1に記載の流量計測装置。 The flow rate measuring apparatus according to claim 1, wherein the control unit changes the stop time corresponding to the determined appliance. 前記判別手段は、器具の停止判別機能を有し、
前記制御手段は、前記停止判別機能により器具が停止したと判別されるまでは他の器具の判別を停止する請求項1または2に記載の流量計測装置。
The determination means has a stop determination function of the instrument,
It said control means, wherein until it is determined that the instrument has been stopped by the stop determination function flow rate measuring device according to claim 1 or 2 stop discrimination of other instruments.
前記所定時間であっても差分値の絶対値が所定回数連続して所定値以下になった場合は、器具判別の停止を解除して器具判別を再開する請求項1または2に記載の流量計測装置。 3. The flow rate according to claim 1, wherein when the absolute value of the difference value is not more than a predetermined value continuously for a predetermined number of times even within the predetermined time, the apparatus determination is stopped and the apparatus determination is restarted. Measuring device. 流路に流れる流体の流量を所定時間間隔で計測する流量計測手段と、Flow rate measuring means for measuring the flow rate of the fluid flowing in the flow path at predetermined time intervals;
前記流量計測手段から出力される流体の流量の差分値を求める演算手段と、A calculating means for obtaining a difference value of the flow rate of the fluid output from the flow rate measuring means;
起動初期の使用流量の変動が大きい器具を判別するための変動判定値と使用された器具を判別する比較判定値とを記憶する記憶手段と、Storage means for storing a variation judgment value for discriminating an appliance having a large fluctuation in the use flow rate at the initial stage of startup and a comparison judgment value for discriminating a used appliance;
前記演算手段により算出された差分値と前記記憶手段の比較判定値との大きさを比較し使用される器具を判別検知する判別手段と、A discriminating means for discriminating and detecting an instrument to be used by comparing the magnitude of the difference value calculated by the computing means and the comparison judgment value of the storage means;
前記判別手段により器具が始動されたと判断された後、差分値の絶対値が所定回数連続しAfter the determination means determines that the instrument has been started, the absolute value of the difference value continues for a predetermined number of times.
て前記記憶手段の変動判定値以下であればその後の前記判別手段の器具判別を行い、差分値の絶対値が変動判定値以下にならなければ、その後の差分値の絶対値が所定回数連続して所定値以下になるまで、その後の前記判別手段の器具判別動作を停止する制御手段を有する流量計測装置。If it is less than the fluctuation determination value of the storage means, then the instrument determination of the determination means is performed, and if the absolute value of the difference value is not less than or equal to the fluctuation determination value, the subsequent absolute value of the difference value continues for a predetermined number of times. A flow rate measuring device having control means for stopping the appliance discriminating operation of the discriminating means thereafter until the value falls below a predetermined value.
流量計測手段として超音波流量計を用いる請求項1〜5のいずれか1項に記載の流量計測装置。 Flow rate measuring apparatus according to any one of claims 1-5 using an ultrasonic flowmeter as the flow rate measuring means.
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