JP3522934B2 - Gas fuel gauge - Google Patents
Gas fuel gaugeInfo
- Publication number
- JP3522934B2 JP3522934B2 JP32989695A JP32989695A JP3522934B2 JP 3522934 B2 JP3522934 B2 JP 3522934B2 JP 32989695 A JP32989695 A JP 32989695A JP 32989695 A JP32989695 A JP 32989695A JP 3522934 B2 JP3522934 B2 JP 3522934B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- gas
- gas cylinder
- remaining usable
- usable time
- 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
Landscapes
- Measuring Fluid Pressure (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、在宅酸素療法や補
助呼吸用、あるいは、鉱山、防災、潜水用等に用いられ
る携帯用酸素ボンベシステムや、溶接用、半導体製造用
等に用いられるガスのガスボンベに取り付けられ、残り
使用可能時間を算出表示するガス残量計に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable oxygen cylinder system used for home oxygen therapy, assisted breathing, mining, disaster prevention, diving, etc., and a gas used for welding, semiconductor manufacturing, etc. The present invention relates to a gas fuel gauge attached to a gas cylinder and calculating and displaying the remaining usable time.
【０００２】[0002]
【従来の技術】年々、着実に増加している在宅酸素療法
は、受療中の慢性呼吸不全患者のなかでも病状が安定
し、酸素吸入のみを維持すれば退院が可能である患者に
適用され、引き続き家庭において酸素投与を行うことに
よって、一般の人と変わらない家庭生活や、社会への復
帰を可能にする方法である。肺気腫症や慢性気管支炎な
どの慢性閉塞性肺疾患（ＣＯＰＤ）をはじめ、肺結核後
遺症、間質性肺疾患、肺癌など在宅酸素療法を実施して
いる人は現在でも３万人を越えると言われている。2. Description of the Related Art Home oxygen therapy, which has been steadily increasing year by year, is applied to patients with chronic respiratory failure who are receiving medical treatment, whose condition is stable, and who can be discharged from the hospital by maintaining only oxygen inhalation. By continuing to administer oxygen at home, it is a method that makes it possible to return to society and the family life just like ordinary people. It is said that more than 30,000 people are currently undergoing home oxygen therapy, including chronic obstructive pulmonary disease (COPD) such as emphysema and chronic bronchitis, pulmonary tuberculosis sequelae, interstitial lung disease, and lung cancer. ing.
【０００３】上記在宅酸素療法においては小型の携帯可
能な酸素ガス等のガス（以下単に「ガス」という）ボン
ベが用いられるが、使用者にとって残り使用可能時間を
知ることは安全性確保の上で極めて重要なことである。
鉱山、防災用、潜水用等のガスボンベについても同じこ
とが言える。また、溶接、半導体製造等にあっては、ガ
ス切れを事前に察知管理する必要がある。然るに、上記
用途のガスボンベにおいて残り使用可能時間を知らしめ
るために従来は、圧力計が用いられていた。In the above home oxygen therapy, a small gas cylinder such as oxygen gas (hereinafter simply referred to as "gas") is used, but it is necessary for the user to know the remaining usable time in order to ensure safety. That is extremely important.
The same applies to gas cylinders for mines, disaster prevention, diving, etc. Further, in welding, semiconductor manufacturing, etc., it is necessary to detect and manage out of gas in advance. However, in order to inform the remaining usable time of the gas cylinder for the above-mentioned use, a pressure gauge has been conventionally used.
【０００４】[0004]
【発明が解決しようとする課題】上述したように従来
は、ガスの残り使用可能時間を表示するために圧力計を
用いていたが、慣れない者、殊に年配者にとって圧力計
の値から残り使用可能時間を正しく把握することは困難
であり、利用者にとって大きな負担となっていた。そこ
で本発明は、残り使用可能時間そのものをデジタル表示
可能にすることにより、何人も何らの負担なく、ガスの
残り使用可能時間を正しく且つ迅速に知ることができ、
以て在宅酸素療法、ダイビング、鉱山における作業等を
安全に行わしめ、また、溶接、半導体製造等に当り、ガ
ス切れの事前察知を容易ならしめるガス残量計を提供す
ることを課題とする。As described above, the pressure gauge is conventionally used to display the remaining usable time of the gas. However, for those who are unfamiliar, especially the elderly, the pressure gauge value remains. It is difficult to correctly grasp the usable time, which is a heavy burden on the user. Therefore, according to the present invention, the remaining usable time itself can be digitally displayed, so that the remaining usable time of the gas can be accurately and quickly known without any burden on any person.
Therefore, it is an object of the present invention to provide home gas oxygen therapy, diving, work in a mine, etc. safely, and to provide a gas fuel gauge that facilitates prior detection of gas shortage in welding, semiconductor manufacturing, etc.
【０００５】[0005]
【課題を解決するための手段】本発明は、ガスボンベに
取り付けられて該ガスボンベの残り使用可能時間を算出
表示するガス残量計であって、前記ガスボンベのガスボ
ンベ内圧力計測手段と、前記圧力計測手段により計測さ
れた前記ガスボンベ内圧力の所定時間内における圧力降
下量を算出する圧力降下量算出手段と、前記ガスボンベ
内圧力と前記圧力降下量に基いて残り使用可能時間を算
出する残り使用可能時間算出手段と、前記残り使用可能
時間を表示する残り使用可能時間表示手段と、前記所定
時間内における圧力降下量が所定値未満の場合に自動的
に電源を切る自動オフ手段とを含み、前記残り使用可能
時間算出のための前記ガスボンベ内圧力デ−タとして、
一定時間毎のガスボンベ内圧力値の内最新の複数のデ−
タの平均値を用いることを特徴とするガス残量計、を以
って上記課題を解決した。。DISCLOSURE OF THE INVENTION The present invention is a gas fuel gauge attached to a gas cylinder for calculating and displaying the remaining usable time of the gas cylinder, the means for measuring the pressure inside the gas cylinder of the gas cylinder, and the pressure measurement. A pressure drop amount calculating means for calculating a pressure drop amount within a predetermined time of the gas cylinder internal pressure measured by means, and a remaining usable time for calculating a remaining usable time based on the gas cylinder internal pressure and the pressure drop amount. The remaining means includes a calculating means, a remaining usable time display means for displaying the remaining usable time, and an automatic off means for automatically turning off the power when the pressure drop amount within the predetermined time is less than a predetermined value. As the pressure data in the gas cylinder for calculating the usable time,
The latest multiple data of the gas cylinder pressure values at regular intervals
The above problem has been solved by a gas fuel gauge characterized by using an average value of data. .
【０００６】[0006]
【発明の実施の形態】本発明の好ましい実施の形態を添
付図面を参照しつつ説明する。図１は本発明に係るガス
残量計１１を組み込んだバルブ装置の構成例を示すもの
で、バルブ本体１にメインバルブ２、減圧弁機構３、流
量調整ユニット４、ガス供出用ノズル継手５及び充填専
用ポ−ト６を設け、バルブ本体１のオネジ管７をガスボ
ンベにネジ込むことによりガスボンベに取り付けるよう
になっている。ガス残量計１１はバルブ本体１の上面に
ネジ込むことにより取り付けられ、保護カバ−８に囲ま
れて保護される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a configuration example of a valve device incorporating a gas fuel gauge 11 according to the present invention, in which a main valve 2, a pressure reducing valve mechanism 3, a flow rate adjusting unit 4, a gas delivery nozzle joint 5 and a valve body 1 are provided. A port 6 for exclusive use for filling is provided, and the male screw tube 7 of the valve body 1 is screwed into the gas cylinder so as to be attached to the gas cylinder. The gas fuel gauge 11 is attached by being screwed onto the upper surface of the valve body 1, and is protected by being surrounded by the protective cover 8.
【０００７】図２はガス残量計１１の上面、即ち、表示
面の一例を示し、図３はその縦断面を示している。図２
および図３において、ガス残量計１１は、ケ−ス１２
と、一部または全面が透明の正面パネル１３と、正面パ
ネル１３の内側に嵌め込まれた液晶ディスプレイ（ＬＣ
Ｄ）１４と、ケ−ス１２及び正面パネル１３により囲ま
れた空間内に設けられた基板の表面に形成された回路部
１５と、回路１５に接続された電池１６とを備えてい
る。FIG. 2 shows an example of the upper surface of the gas fuel gauge 11, that is, an example of the display surface, and FIG. 3 shows its longitudinal section. Figure 2
In FIG. 3 and FIG. 3, the gas fuel gauge 11 is a case 12
And a front panel 13 which is partially or entirely transparent, and a liquid crystal display (LC
D) 14, a circuit portion 15 formed on the surface of the substrate provided in the space surrounded by the case 12 and the front panel 13, and a battery 16 connected to the circuit 15.
【０００８】また、ガス残量計１１の裏面側には、ガス
ボンベ内のガスの圧力を導くガス導入孔１７が形成され
た接続継手１８が設けられ、この接続継手１８の内側に
は、ガス導入孔１７に導かれたガスの圧力を計測する圧
力計測手段である圧力センサ１９が配置されている。圧
力センサ１９は、図示してない導線等により回路部１５
に接続されている。圧力センサ１９としては、例えば、
ダイヤフラム型の構造を有する歪ゲ−ジ式の圧力センサ
などを用いることができる。Further, a connection joint 18 having a gas introduction hole 17 for guiding the pressure of the gas in the gas cylinder is provided on the rear surface side of the gas fuel gauge 11, and inside the connection joint 18, the gas introduction hole 17 is introduced. A pressure sensor 19, which is a pressure measuring means for measuring the pressure of the gas introduced into the hole 17, is arranged. The pressure sensor 19 has a circuit portion 15 formed by a conductor (not shown).
It is connected to the. As the pressure sensor 19, for example,
A strain gauge type pressure sensor having a diaphragm type structure can be used.
【０００９】液晶ディスプレイ１４は、ガスボンベの残
り使用可能時間をデジタル表示する残り使用可能時間表
示手段である残り使用可能時間表示部２１と、圧力セン
サ１９により計測されるガスボンベ内のガス圧力をバ−
グラフで表示するボンベ内圧表示手段であるボンベ内圧
表示部２２とを備えている。２３は表示スタ−トスイッ
チである。The liquid crystal display 14 displays the remaining usable time display section 21 which is a remaining usable time display means for digitally displaying the remaining usable time of the gas cylinder, and the gas pressure in the gas cylinder measured by the pressure sensor 19.
A cylinder internal pressure display unit 22 which is a cylinder internal pressure display means for displaying a graph is provided. Reference numeral 23 is a display start switch.
【００１０】図４はガス残量計１１の内部構成を示すブ
ロック図で、回路部２５は、圧力センサ１９から送られ
てくる圧力値信号Ｓ１を増幅する増幅器２６と、増幅器
２６から送信される圧力値信号Ｓ２に基づきガスボンベ
の残り使用可能時間の算出処理等を行う中央演算処理装
置（ＣＰＵ）２７と、このＣＰＵ２７から出力される電
源・発振ＯＮ−ＯＦＦ信号Ｓ３を受けて圧力センサ１９
および増幅器２６に所定電圧を加える電源回路２８と、
電源・発振ＯＮ−ＯＦＦ信号Ｓ３を受けてＣＰＵ２７に
所定発振周波数の電気信号を送る発振回路２９とを備え
ている。電源回路２８及びＣＰＵ２７は、電池１６に接
続されている。FIG. 4 is a block diagram showing the internal structure of the gas fuel gauge 11. The circuit section 25 is an amplifier 26 for amplifying the pressure value signal S1 sent from the pressure sensor 19, and is sent from the amplifier 26. A central processing unit (CPU) 27 that performs a process of calculating the remaining usable time of the gas cylinder based on the pressure value signal S2, and a pressure sensor 19 in response to a power supply / oscillation ON-OFF signal S3 output from the CPU 27.
And a power supply circuit 28 for applying a predetermined voltage to the amplifier 26,
The power supply / oscillation ON-OFF signal S3 is received, and an oscillation circuit 29 for sending an electric signal of a predetermined oscillation frequency to the CPU 27 is provided. The power supply circuit 28 and the CPU 27 are connected to the battery 16.
【００１１】また、回路２５は、圧力センサ１９により
計測した圧力値を一時的に保存するボンベ内圧記憶手段
３５を備えている。ボンベ内圧記憶手段３５は、ＣＰＵ
２７の内部に設けられる。ボンベ内圧記憶手段３５は、
読出し・書込み可能なメモリ（ＲＡＭ）等により構成さ
れ、圧力センサ１９により逐次計測される圧力値を一定
時間間隔、例えば、１分間隔のデ−タを３０分間分、即
ちト−タルで３０個のデ−タを記憶し、それ以降は逐次
デ−タの更新を行なうようにする。The circuit 25 also includes a cylinder internal pressure storage means 35 for temporarily storing the pressure value measured by the pressure sensor 19. The cylinder internal pressure storage means 35 is a CPU
It is provided inside 27. The cylinder internal pressure storage means 35 is
It is composed of a readable / writable memory (RAM) and the like, and the pressure value successively measured by the pressure sensor 19 is a constant time interval, for example, one minute interval of data for 30 minutes, that is, 30 data in total. Data is stored and the data is sequentially updated thereafter.
【００１２】ＣＰＵ２７は、アナログ信号である圧力値
信号Ｓ２をデジタル信号に変換するＡ／Ｄ変換部３０
と、ガスボンベの残り使用可能時間を算出する残り使用
可能時間算出手段である残り使用可能時間算出処理部３
１と、ガスの消費が無いことを判定して自動的に電源を
オフまたはスリ−プ状態とする自動オフ手段である自動
オフ処理部３２と、圧力降下量設定処理部３３と、圧力
降下量算出処理部３４と、ボンベ内圧記憶手段３５とを
備えている。The CPU 27 is an A / D converter 30 for converting the pressure value signal S2, which is an analog signal, into a digital signal.
And a remaining usable time calculation processing unit 3 which is a remaining usable time calculating means for calculating the remaining usable time of the gas cylinder.
1, an automatic-off processing unit 32 which is an automatic-off means for automatically turning the power off or in a sleep state by judging that gas is not consumed, a pressure drop amount setting processing unit 33, and a pressure drop amount. The calculation processing unit 34 and the cylinder internal pressure storage unit 35 are provided.
【００１３】なお、本ガス残量計にアラ−ム機構を付加
することができる。即ち、回路２５内に、アラ−ム出力
処理部３７を設けると共にこのアラ−ム出力処理部３７
からの出力によって駆動されるアラ−ム３８を設置す
る。アラ−ム出力処理部３７には残り使用可能時間算出
処理部３１から残り使用可能時間に関するデ−タが送ら
れ、この時間デ−タＴ1 と予め設定される時間Ｔ2 との
比較がなされる。そして、Ｔ1 ≦Ｔ2 の関係に至った時
点でアラ−ム出力処理部３７からアラ−ム駆動信号が発
せられ、アラ−ム３８が鳴動したり点滅したりする。あ
るいは、Ａ／Ｄ変換部３０からガスボンベの圧力値Ｖ1
を取り込み、これと予め設定される圧力値Ｖ2 とを比較
し、Ｖ1 ≦Ｖ2 の関係に至った時点でアラ−ム３８を駆
動することとしてもよい。勿論上記両者を併用してもよ
い。An alarm mechanism can be added to this gas fuel gauge. That is, an alarm output processing section 37 is provided in the circuit 25, and the alarm output processing section 37 is also provided.
An alarm 38 is installed which is driven by the output from the. Data relating to the remaining usable time is sent from the remaining usable time calculation processing unit 31 to the alarm output processing unit 37, and this time data T 1 is compared with the preset time T 2. It When the relationship of T 1 ≤T 2 is reached, an alarm drive signal is issued from the alarm output processing section 37, and the alarm 38 sounds or blinks. Alternatively, the pressure value V 1 of the gas cylinder from the A / D converter 30
May be taken in, and this is compared with a preset pressure value V 2, and the alarm 38 may be driven when the relationship of V 1 ≦ V 2 is reached. Of course, both of the above may be used together.
【００１４】上記構成のガス残量計１１の動作例を説明
する。表示スタ−トスイッチ２３を押して電源を投入す
ると、先ず圧力センサ１９によって計測されたボンベ内
圧力値が増幅器２６で増幅され、Ａ／Ｄ変換部３０でＡ
／Ｄ変換された後ボンベ内圧記憶手段３５、残り使用可
能時間算出処理部３１及び圧力降下量算出処理部３４に
送られ、且つ、その値がＭＰａ単位で少数点以下１桁ま
で液晶ディスプレイ１４に表示される。An example of the operation of the gas fuel gauge 11 having the above structure will be described. When the display start switch 23 is pressed and the power is turned on, first, the pressure value in the cylinder measured by the pressure sensor 19 is amplified by the amplifier 26, and the A / D conversion unit 30 outputs A.
After the D / D conversion, it is sent to the cylinder internal pressure storage means 35, the remaining usable time calculation processing unit 31, and the pressure drop amount calculation processing unit 34, and the value is displayed on the liquid crystal display 14 up to one digit below the decimal point in MPa unit. Is displayed.
【００１５】圧力センサ１９では一定時間（例えば１
分）置きにボンベ内圧力を計測し、その計測値は上記の
ようにして各部に供給される。圧力降下量算出処理部３
４においては、新たに供給される圧力値と、ボンベ内圧
記憶手段３５に記憶されている１つ前の圧力値との比較
を行い、その差、即ち、一定時間内における圧力降下量
を算出する。次に、圧力降下量設定処理部３３の動作に
より算出された圧力降下量Ａを逐時設定値Ｂ（例えば毎
分１５ＫＰａ。この値は圧力センサ１９、Ａ／Ｄ変換部
３０及びＣＰＵの分解能で決まる値で、予め設定され
る。）と比較し、Ａ＜Ｂの場合には設定値Ｂを以て毎分
の圧力降下量と見なして残り使用可能時間を算出し、Ａ
≧Ｂの場合には算出された圧力降下量を以て残り使用可
能時間を算出する。The pressure sensor 19 has a fixed time (for example, 1
Every minute, the pressure inside the cylinder is measured, and the measured value is supplied to each part as described above. Pressure drop calculation processing unit 3
In 4, the newly supplied pressure value is compared with the previous pressure value stored in the cylinder internal pressure storage means 35, and the difference, that is, the pressure drop amount within a fixed time is calculated. . Next, the pressure drop amount A calculated by the operation of the pressure drop amount setting processing unit 33 is set to the instantaneous set value B (for example, 15 KPa per minute. This value is the resolution of the pressure sensor 19, the A / D conversion unit 30, and the CPU. The predetermined usable value is set in advance, and when A <B, the remaining usable time is calculated by regarding the set value B as a pressure drop amount per minute and calculating the remaining usable time.
When ≧ B, the remaining usable time is calculated using the calculated pressure drop amount.
【００１６】バルブが開いて設定値以上の圧力降下（流
量消費）が起こると、液晶ディスプレイ表示モ−ド処理
部３６が動作し、残り使用可能時間表示モ−ドに切り替
わり、残り使用可能時間算出処理部３１が動作し、Ａ／
Ｄ変換部３０から供給されるボンベ内圧Ｐ（ＭＰａ）
と、圧力降下量設定処理部３３から供給される圧力降下
量Ｑ（ＭＰａ／分）と、出荷時に予め設定される零分ベ
−ス圧Ｒ（通例 2.5ＭＰａ又は 3.0ＭＰａ）とから、次
式にて残り使用可能時間Ｔ（分）が算出され、液晶ディ
スプレイ１４に表示される。
Ｔ＝（Ｐ−Ｒ）／ＱWhen the valve is opened and a pressure drop (flow rate consumption) exceeding the set value occurs, the liquid crystal display display mode processing unit 36 operates to switch to the remaining usable time display mode, and the remaining usable time is calculated. The processing unit 31 operates, and A /
Cylinder internal pressure P (MPa) supplied from the D conversion unit 30
From the pressure drop amount Q (MPa / min) supplied from the pressure drop amount setting processing unit 33 and the zero minute base pressure R (usually 2.5 MPa or 3.0 MPa) preset at the time of shipment, The remaining usable time T (minutes) is calculated at and is displayed on the liquid crystal display 14. T = (P−R) / Q
【００１７】電源ＯＮ後バルブが開かない場合及び圧力
降下量が設定値未満の場合は、液晶ディスプレイ表示モ
−ド処理部３６の動作により、例えば５分後に残り使用
可能時間表示モ−ドに切り替わるようにし、上記の如く
設定値を以て圧力降下量とみなした残り使用可能時間が
残り使用可能時間表示部２１に表示される。If the valve does not open after the power is turned on and the pressure drop amount is less than the set value, the operation mode of the liquid crystal display display mode processing unit 36 switches to the remaining usable time display mode after 5 minutes, for example. In this way, the remaining usable time, which is regarded as the pressure drop amount based on the set value as described above, is displayed on the remaining usable time display portion 21.
【００１８】自動電源オフ動作（電源消し忘れ対策）
は、電源オン直後から例えば３０分経過した時点、ある
いは、ある時間経過した時点から例えば３０分経過した
時点において、例えば１分前のボンベ内圧と現在のボン
ベ内圧との差が15ｋＰａ未満になった時（圧力降下が分
解能以下になった時）に、圧力降下量算出処理部３４に
おいて30分前のボンベ内圧と現在のボンベ内圧を比較
し、ここで、差が15ｋＰａ以上ある場合は定時計測を続
け、差が15ｋＰａ未満の時（30分間の圧力降下が分解能
以下の時）には、圧力降下がないと判断し、その場合は
ガス消費がないものとみなして自動オフ処理部３２が動
作し、電源・発振オン−オフ信号Ｓ３をオフ信号として
出力し、自動的に電源をオフ又はスリ−プ状態とする
（図５参照）。Automatic power off operation (forgetting to turn off the power)
Indicates that the difference between the cylinder internal pressure one minute before and the current cylinder internal pressure becomes less than 15 kPa, for example, at the time point 30 minutes have passed immediately after the power was turned on, or at the time point 30 minutes have elapsed since a certain time has elapsed, for example. At the time (when the pressure drop becomes less than the resolution), the pressure drop calculation processing unit 34 compares the cylinder internal pressure 30 minutes before and the current cylinder internal pressure, and when the difference is 15 kPa or more, the regular measurement is performed. Continuing, when the difference is less than 15 kPa (when the pressure drop for 30 minutes is less than the resolution), it is determined that there is no pressure drop, and in that case it is considered that there is no gas consumption and the automatic off processing unit 32 operates. The power / oscillation on / off signal S3 is output as an off signal, and the power is automatically turned off or in the sleep state (see FIG. 5).
【００１９】図６はガス残量計１１の他の内部構成例を
示すブロック図で、上記実施例におけるボンベ内圧記憶
手段３５に代えて圧力デ−タの平均値デ−タ記憶手段３
９を配置し、更に平均値デ−タ記憶手段３９と圧力降下
量算出処理部３４の前に圧力デ−タ処理部４０を置いた
ものである。FIG. 6 is a block diagram showing another example of the internal structure of the gas fuel gauge 11. Instead of the cylinder internal pressure storage means 35 in the above embodiment, the average value data storage means 3 of pressure data is shown.
9 is arranged, and a pressure data processing section 40 is placed in front of the average value data storage means 39 and the pressure drop amount calculation processing section 34.
【００２０】上記実施例では、残り使用可能時間の算出
処理用デ−タとして一定時間毎のボンベ内圧力値そのも
のの差を用いていたが、この実施例では一定時間毎の平
均値をデ−タとして用いる。この平均値デ−タは次のよ
うにして得る（図７参照）。In the above-mentioned embodiment, the difference in the pressure value in the cylinder itself at every constant time is used as the data for the calculation process of the remaining usable time, but in this embodiment, the average value at every constant time is used as the data. Used as data. This average value data is obtained as follows (see FIG. 7).
【００２１】この場合、例えば１分毎にボンベ圧力値の
読み込みが行われ、圧力デ−タが圧力デ−タ処理部４０
に送られる。電源オン直後は計測値そのものが現在値と
され、１分後には上記値と１分後の２点の平均値を求
め、それを１分後の現在値とする。そして、２分後に
は、電源オン直後の圧力値、１分後の圧力値及び２分後
の圧力値の３つの値の平均値を以て現在値とする。以
後、最近の３点計測値の平均値を以て現在値としてい
く。In this case, for example, the cylinder pressure value is read every one minute, and the pressure data is processed by the pressure data processing unit 40.
Sent to. Immediately after the power is turned on, the measured value itself is the current value. After 1 minute, the above value and the average value of the two points after 1 minute are obtained, and the average value is obtained after 1 minute. Then, after 2 minutes, the average value of three values of the pressure value immediately after the power is turned on, the pressure value after 1 minute, and the pressure value after 2 minutes is taken as the current value. Thereafter, the average value of the latest three measured values is used as the current value.
【００２２】この現在値の算出は圧力デ−タ処理部４０
において行われ、得られた現在値（平均値）デ−タが平
均値デ−タ記憶手段３９に供給され、記憶される。圧力
降下量算出処理部３４においては、１分前の平均値と現
在（最新）の平均値との差から圧力降下量を算出し、残
り使用可能時間算出処理部３１において残り使用可能時
間を算出する。The calculation of the present value is performed by the pressure data processing unit 40.
The current value (average value) data obtained by the above is supplied to the average value data storage means 39 and stored therein. In the pressure drop amount calculation processing unit 34, the pressure drop amount is calculated from the difference between the average value one minute ago and the current (latest) average value, and the remaining usable time calculation processing unit 31 calculates the remaining usable time. To do.
【００２３】なお、上述した例では２分間の３点計測値
を平均値算出のデ−タとして用いているが、これを３分
間の４点計測値とすることもできる。勿論それ以上の計
測値を用いることもできるが、通常それ以上は必要な
い。In the above example, the 3-point measured value for 2 minutes is used as the data for calculating the average value, but it can be used as the 4-point measured value for 3 minutes. Of course, more measurements can be used, but usually no more is needed.
【００２４】自動電源オフ動作（電源消し忘れ対策）
は、上記実施例同様、例えば１分前の平均値と現在の平
均値との差が15ｋＰａ未満になった時（圧力降下が分解
能以下になった時）に、30分前の平均値と現在の平均値
を比較し、ここで、差が15ｋＰａ以上ある場合は定時計
測を続け、差が15ｋＰａ未満の時（30分間の圧力降下が
分解能以下の時）には、電源をオフすることにより行わ
れる（図８参照）。Automatic power off operation (forgetting to turn off the power)
Is similar to the above embodiment, for example, when the difference between the average value one minute before and the current average value is less than 15 kPa (when the pressure drop is below the resolution), the average value 30 minutes before and the current value are When the difference is less than 15 kPa, the timed measurement is continued, and when the difference is less than 15 kPa (when the pressure drop for 30 minutes is less than the resolution), the power is turned off. (See FIG. 8).
【００２５】上記動作においては、平均値デ−タ記憶手
段３９に３０分分の平均値デ−タ３０個が蓄積されるこ
とになるが、平均値デ−タ記憶手段３９が十分な容量を
有していない場合には、１分置きではなく２分置きの平
均値デ−タ（１５個と半減する）を蓄積することとして
もよい。その際、３０分前のデ−タがスキップされると
きは、３１分前のデ−タを用いればよい。更に、３分置
きの平均値デ−タを用いることも可能である。In the above operation, 30 pieces of average value data for 30 minutes are accumulated in the average value data storage means 39, but the average value data storage means 39 has a sufficient capacity. When not having, it is good also as accumulating the average value data of every 2 minutes instead of every 1 minute (it halves to 15). At this time, if the data 30 minutes before is skipped, the data 31 minutes before may be used. Further, it is also possible to use average value data every 3 minutes.
【００２６】[0026]
【発明の効果】本発明は上述した通りであり、構成簡易
であって比較的安価にて供給でき、種々の用途に利用可
能で、残り使用可能時間が見やすくて把握しやすいデジ
タル表示にて表示されるので、使用者はこの表示を見る
だけでガスボンベの残り使用可能時間を容易に把握する
ことができ、また、ガス切れを事前に察知することがで
きる。そのため、従来のようなガスの圧力値から残り使
用可能時間への読み替えを行う必要がなくなり、従来に
比べ、残り使用可能時間を正確且つ迅速に把握できる。Industrial Applicability As described above, the present invention has a simple structure, can be supplied at a relatively low cost, can be used for various purposes, and can be displayed in a digital display which is easy to see and grasp the remaining usable time. Therefore, the user can easily grasp the remaining usable time of the gas cylinder by looking at this display, and also can detect the out of gas in advance. Therefore, it is not necessary to replace the conventional gas pressure value with the remaining usable time, and the remaining usable time can be grasped more accurately and quickly than in the conventional case.
【００２７】また、圧力値から残り使用可能時間への読
み替えがなくなることから、装置に慣れていない者であ
っても容易に取り扱うことができる上、不慣れや勘違い
による読み替えミスのおそれも解消でき、更に、自動オ
フ処理部を備えているので、ガス残量計が使用されてい
ない時には、自動的にガス残量計の電源をオフ又はスリ
−プ状態にすることができるため、電池消費削減や省エ
ネルギ−を図ることができる。Further, since there is no need to read from the pressure value to the remaining usable time, even a person who is not accustomed to the apparatus can easily handle it, and the risk of misreading due to inexperience or misunderstanding can be eliminated. Further, since the automatic off processing unit is provided, when the gas fuel gauge is not in use, the power of the gas fuel gauge can be automatically turned off or in the sleep state, which reduces battery consumption and Energy saving can be achieved.
【図１】 本発明に係るガス残量計の使用状態の一例を
示す部分断面正面図である。FIG. 1 is a partial sectional front view showing an example of a usage state of a gas fuel gauge according to the present invention.
【図２】 本発明に係るガス残量計の表示面の一例を示
す図である。FIG. 2 is a diagram showing an example of a display surface of a gas fuel gauge according to the present invention.
【図３】 本発明に係るガス残量計の縦断面図である。FIG. 3 is a vertical sectional view of a gas fuel gauge according to the present invention.
【図４】 本発明に係るガス残量計の内部構成を示すブ
ロック図である。FIG. 4 is a block diagram showing an internal configuration of a gas fuel gauge according to the present invention.
【図５】 図４に示す構成のガス残量計における自動電
源オフ処理方法を示すフロ−チャ−トである。5 is a flowchart showing an automatic power-off processing method in the gas fuel gauge having the configuration shown in FIG.
【図６】 本発明に係るガス残量計の他の内部構成を示
すブロック図である。FIG. 6 is a block diagram showing another internal configuration of the gas fuel gauge according to the present invention.
【図７】 図６に示す構成のガス残量計における平均値
デ−タ採取方法を示す図である。7 is a diagram showing a method for collecting average value data in the gas fuel gauge having the configuration shown in FIG.
【図８】 図６に示す構成のガス残量計における自動電
源オフ処理方法を示すフロ−チャ−トである。8 is a flowchart showing an automatic power-off processing method in the gas fuel gauge having the configuration shown in FIG.
１１ ガス残量計 １２ ケ−ス １３ 正面パネル １４ 液晶ディスプレイ（ＬＣＤ） １５ 回路部 １６ 電池 １７ ガス導入孔 １８ 接続継手 １９ 圧力センサ ２１ 残り使用可能時間表示部 ２２ ボンベ内圧表示部 ３１ 残り使用可能時間算出処理部 ３２ 自動オフ処理部 ３３ 圧力降下量設定処理部 ３４ 圧力降下量算出処理部 ３５ ボンベ内圧記憶手段 ３６ 液晶ディスプレイ表示モ−ド処理部 ３７ アラ−ム出力処理部 ３８ アラ−ム ３９ 平均値デ−タ記憶手段 ４０ 圧力デ−タ処理部 11 Gas fuel gauge 12 cases 13 front panel 14 Liquid Crystal Display (LCD) 15 circuit 16 batteries 17 Gas introduction hole 18 Connection joint 19 Pressure sensor 21 Remaining available time display 22 Cylinder pressure display 31 Remaining available time calculation processing unit 32 Automatic off processing unit 33 Pressure drop setting processor 34 Pressure drop calculation processing unit 35 Cylinder internal pressure storage means 36 Liquid crystal display display mode processing unit 37 Alarm output processing unit 38 Alarm 39 Mean value data storage means 40 Pressure data processing unit
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01L 11/00 G01F 22/02 B63C 11/ Front page continuation (58) Fields surveyed (Int.Cl. 7 , DB name) G01L 11/00 G01F 22/02 B63C 11 /
Claims (4)
ベの残り使用可能時間を算出表示するガス残量計であっ
て、前記ガスボンベのガスボンベ内圧力計測手段と、前
記圧力計測手段により計測された前記ガスボンベ内圧力
の所定時間内における圧力降下量を算出する圧力降下量
算出手段と、前記ガスボンベ内圧力と前記圧力降下量に
基いて残り使用可能時間を算出する残り使用可能時間算
出手段と、前記残り使用可能時間を表示する残り使用可
能時間表示手段と、前記所定時間内における圧力降下量
が所定値未満の場合に自動的に電源を切る自動オフ手段
とを含み、前記残り使用可能時間算出のための前記ガス
ボンベ内圧力デ−タとして、一定時間毎のガスボンベ内
圧力値の内最新の複数のデ−タの平均値を用いることを
特徴とするガス残量計。1. A gas fuel gauge attached to a gas cylinder for calculating and displaying a remaining usable time of the gas cylinder, wherein the gas cylinder internal pressure measuring means of the gas cylinder and the inside of the gas cylinder measured by the pressure measuring means. Pressure drop amount calculation means for calculating the pressure drop amount within a predetermined time of pressure, remaining usable time calculation means for calculating the remaining usable time based on the pressure inside the gas cylinder and the pressure drop amount, and the remaining usable The remaining usable time display means for displaying the time, and the automatic off means for automatically turning off the power when the amount of pressure drop within the predetermined time is less than a predetermined value. As the gas cylinder internal pressure data, the average value of the latest multiple data of the gas cylinder internal pressure values at regular intervals is used, and the remaining gas amount is characterized. Total.
含む請求項１に記載のガス残量計。2. The gas fuel gauge according to claim 1, further comprising display means for displaying the pressure inside the gas cylinder.
ンベ内圧力が所定値以下となった際にアラ−ムを駆動す
るアラ−ム出力処理手段を更に含む請求項１又は２に記
載のガス残量計。3. The gas residue according to claim 1, further comprising alarm output processing means for driving an alarm when the remaining usable time and / or the pressure in the gas cylinder becomes equal to or lower than a predetermined value. Quantity meter.
ンベ内圧力の表示手段を圧力計測手段と切り離して構成
した請求項１乃至３のいずれかに記載のガス残量計。4. The gas fuel gauge according to any one of claims 1 to 3, wherein the remaining usable time and / or the pressure display means for displaying the gas cylinder pressure is separated from the pressure measurement means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32989695A JP3522934B2 (en) | 1995-10-13 | 1995-11-24 | Gas fuel gauge |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7-292028 | 1995-10-13 | ||
| JP29202895 | 1995-10-13 | ||
| JP32989695A JP3522934B2 (en) | 1995-10-13 | 1995-11-24 | Gas fuel gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09166469A JPH09166469A (en) | 1997-06-24 |
| JP3522934B2 true JP3522934B2 (en) | 2004-04-26 |
Family
ID=26558810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32989695A Expired - Fee Related JP3522934B2 (en) | 1995-10-13 | 1995-11-24 | Gas fuel gauge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3522934B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4739535B2 (en) * | 2001-01-22 | 2011-08-03 | 帝人株式会社 | Breathing gas supply device |
| GB2519969B (en) * | 2013-11-01 | 2016-03-09 | Luxfer Gas Cylinders Ltd | Improved compressed gas cylinder |
| FR3044406B1 (en) * | 2015-11-26 | 2017-12-08 | L'air Liquide Sa Pour L'etude Et L'exploitation Des Procedes Georges Claude | OXYACETYLENE WORKING PLANT AND METHOD OF DETERMINING THE AUTONOMY OF SAID INSTALLATION |
-
1995
- 1995-11-24 JP JP32989695A patent/JP3522934B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09166469A (en) | 1997-06-24 |
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