JP2019113480A

JP2019113480A - Electronic digitalization device

Info

Publication number: JP2019113480A
Application number: JP2017248995A
Authority: JP
Inventors: 拓也村上; Takuya Murakami; 義喜早瀬; Yoshiki Hayase
Original assignee: Aichi Tokei Denki Co Ltd
Current assignee: Aichi Tokei Denki Co Ltd
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2019-07-11

Abstract

To provide an electronic digitalization device that allows a more precise electronic digitalization of the result of measurement by a flow meter.SOLUTION: The electronic digitalization device of the present invention receives a reflected light of light from a light emitting element 30 in a dial face 95 (stationary part) in the display unit 94 of the flow meter 90 by a second light receiving element 33 separately provided from first light receiving elements 31 and 32, and makes a correction by subtracting a temperature drift component from changes of the first detection signal of the first light receiving elements 31 and 32 based on changes of the second detection signal of the second light receiving element 33. This makes it possible to suppress the influence of temperature changes and convert the result of the measurement of the flow rate 90 into electronic data more precisely.SELECTED DRAWING: Figure 5

Description

本発明は、流量計の表示部の外面に宛がわれ、表示部内の回転部材の回転を読み取って流量計の計測結果を電子データ化する電子データ化装置に関する。 The present invention relates to an electronic data conversion device that is addressed to the outer surface of a display unit of a flow meter, reads the rotation of a rotating member in the display unit, and converts the measurement result of the flow meter into electronic data.

従来、この種の電子データ化装置として、発光素子が回転部材に向けて出射した光の反射光を第１受光素子にて受光し、その受光強度に応じて第１受光素子が出力する第１検出信号の変化に基づいて回転部材の回転を計数して電子データ化するものが知られている（例えば、特許文献１参照）。 Conventionally, as an electronic data conversion apparatus of this type, the first light receiving element receives the reflected light of the light emitted from the light emitting element toward the rotating member, and the first light receiving element outputs the first light receiving element according to the received light intensity. It is known to count the rotation of the rotating member based on the change in the detection signal and convert it into electronic data (see, for example, Patent Document 1).

特開２００２−１０７１９０号公報（図１，図２、段落［００１４］）JP, 2002-107190, A (Fig. 1, Fig. 2, paragraph [0014])

上述した従来の電子データ化装置では、電子データ化した流量計の計数結果が、実際の流量計の計測結果から大きくずれることがあり、電子データ化の精度の向上が求められていた。 In the conventional electronic data conversion apparatus described above, the counting results of the flowmeter converted into electronic data may be largely deviated from the actual measurement results of the flowmeter, and an improvement in the accuracy of electronic data conversion has been desired.

本発明は、上記事情に鑑みてなされたもので、流量計の計測結果を従来より精度よく電子データ化することが可能な電子データ化装置の提供を目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electronic data conversion device capable of converting the measurement results of a flow meter into electronic data with higher accuracy than in the past.

上記目的を達成するためになされた請求項１の発明は、流量計の表示部の外面に宛がわれ、前記表示部内で回転する回転部材に向けて光を出射する発光素子と、その光の前記回転部材での反射光を受光する第１受光素子と、前記第１受光素子が受光強度に応じて出力する第１検出信号の変化に基づいて前記回転部材の回転を計数して前記流量計の計測結果を電子データ化する計数部と、を有する電子データ化装置において、前記表示部内の不動部分における前記発光素子から光の反射光を受光し、その受光強度に応じた第２検出信号を出力する第２受光素子と、前記第２検出信号の変化に基づいて、前記第１検出信号の変化から温度ドリフト成分を差し引く補正を行う補正部と、を備える電子データ化装置である。 The invention of claim 1 made to achieve the above object is a light emitting element that is directed to the outer surface of the display unit of the flow meter and emits light toward the rotating member that rotates in the display unit, and the light The flow meter measures the rotation of the rotating member based on a change in a first light receiving element that receives light reflected by the rotating member and a first detection signal that the first light receiving element outputs according to the light receiving intensity. And a counting unit for converting the measurement result into electronic data, and the reflected light of the light is received from the light emitting element in the immobile portion in the display unit, and a second detection signal corresponding to the light reception intensity is received. It is an electronic data-ized device provided with the 2nd light sensing element to output, and the amendment part which performs amendment which subtracts a temperature drift ingredient from change of the 1st detection signal based on change of the 2nd detection signal.

請求項２の発明は、前記回転部材は、回転針であり、前記回転針の後ろには、前記不動部分としての文字盤が備えられ、前記第１受光素子は、前記回転針の回転位置に応じて前記回転針での反射光か前記文字盤での反射光かを受光する位置に配置され、前記第２受光素子は、前記回転針の回転位置に拘わらず実質的に前記回転針での反射光を受光せず、前記文字盤での反射光を受光する位置に配置されている請求項１に記載の電子データ化装置である。 In the invention of claim 2, the rotating member is a rotary needle, and a dial plate as the stationary portion is provided behind the rotary needle, and the first light receiving element is at the rotary position of the rotary needle. Accordingly, the light receiving element is disposed at a position to receive the reflected light from the rotary needle or the reflected light from the dial, and the second light receiving element is substantially independent of the rotary position of the rotary needle. The electronic data conversion device according to claim 1, wherein the electronic data conversion device is disposed at a position where the reflected light from the dial is received without receiving the reflected light.

請求項３の発明は、前記第１受光素子の中心と前記第２受光素子の中心とが、前記発光素子を中心とする共通の円の上に配置されている請求項２に記載の電子データ化装置である。 In the invention of claim 3, electronic data according to claim 2, wherein the center of the first light receiving element and the center of the second light receiving element are disposed on a common circle centered on the light emitting element. Device.

請求項４の発明は、前記第１受光素子は、２つ備えられて、前記回転針の回転位置の変化により一方の前記第１受光素子の前記第１検出信号のみが予め設定された閾値を超える第１状態と、両方の前記第１受光素子の前記第１検出信号が前記閾値を超える第２状態と、他方の前記第１受光素子の第１検出信号のみが前記閾値を超える第３状態と、両方の前記第１受光素子の第１検出信号が前記閾値を超えない第４状態とに切り替わるように配置され、前記計数部は、前記第１状態、前記第２状態、前記第３状態、前記第４状態の順番の変化を１サイクルとして前記回転針の１回転を計数する請求項２又は３に記載の電子データ化装置である。 According to the invention of claim 4, two of the first light receiving elements are provided, and a threshold for which only the first detection signal of one of the first light receiving elements is preset by a change in the rotational position of the rotary needle. A first state that exceeds, a second state in which the first detection signals of both of the first light receiving elements exceed the threshold, and a third state in which only the first detection signal of the other first light receiving element exceeds the threshold And the fourth state in which the first detection signals of both the first light receiving elements do not exceed the threshold value, and the counting unit is configured to select the first state, the second state, and the third state. The electronic data generator according to claim 2 or 3, wherein one rotation of the rotary needle is counted with a change in the order of the fourth state as one cycle.

請求項５の発明は、前記第１状態から前記第４状態への変化又は、前記第４状態から前記第３状態への変化又は、前記第３状態から前記第２状態への変化又は、前記第２状態から前記第１状態への変化の少なくとも１つの変化を含む状態変化から前記回転針の逆回転を検出する逆回転検出部を備える請求項４に記載の電子データ化装置である。 According to the invention of claim 5, the change from the first state to the fourth state, the change from the fourth state to the third state, the change from the third state to the second state, or the change The electronic data conversion device according to claim 4, further comprising: a reverse rotation detection unit that detects reverse rotation of the rotary needle from a state change including at least one change of the change from the second state to the first state.

請求項６の発明は、前記表示部の外面に重ねられ、前記第１受光素子及び前記第２受光素子を保持するベース部と、前記ベース部に形成され、前記表示部の前記回転部材以外の部位を視認可能とするための窓部と、前記第１検出信号又は前記第２検出信号が予め設定された基準値を超えたか否かに基づいて前記表示部内に外部から光が差し込んだ異常を検出して、前記計数部による計数を中断させる異常検出部と、を備える請求項１乃至５の何れか１の請求項に記載の電子データ化装置である。 The invention according to claim 6 is formed on a base portion which is superimposed on the outer surface of the display portion and holds the first light receiving element and the second light receiving element, and is formed on the base portion and other than the rotating member of the display portion. An abnormality in which light is externally inserted into the display unit on the basis of a window for enabling visual recognition of a part and whether the first detection signal or the second detection signal exceeds a preset reference value The electronic data conversion apparatus according to any one of claims 1 to 5, further comprising: an abnormality detection unit that detects and interrupts counting by the counting unit.

請求項７の発明は、前記異常検出部は、前記第２検出信号が前記基準値を超えたか否かに基づいて異常を検出するように構成され、前記第２受光素子は、前記第１受光素子より前記窓部の近くに配置されている請求項６に記載の電子データ化装置である。 In the invention of claim 7, the abnormality detection unit is configured to detect an abnormality based on whether the second detection signal exceeds the reference value, and the second light receiving element is configured to detect the first light reception. 7. The electronic data conversion device according to claim 6, which is disposed closer to the window than the element.

請求項１の電子データ化装置では、第１受光素子とは別個に備えた第２受光素子で、流量計の表示部内の不動部分における発光素子から光の反射光を受光し、その第２受光素子の第２検出信号の変化に基づいて第１受光素子の第１検出信号の変化から温度ドリフト成分を差し引く補正を行う。これにより、温度変化の影響が抑えられ、流量計の計測結果を従来より精度よく電子データ化することが可能になる。 In the electronic data conversion device according to claim 1, the second light receiving element provided separately from the first light receiving element receives the reflected light of the light from the light emitting element in the immobile portion in the display unit of the flowmeter, and the second light receiving Based on the change of the second detection signal of the element, the correction of subtracting the temperature drift component from the change of the first detection signal of the first light receiving element is performed. As a result, the influence of the temperature change can be suppressed, and it becomes possible to convert the measurement result of the flowmeter into electronic data more accurately than in the past.

請求項２の電子データ化装置では、回転部材としての回転針に発光素子から向かった光は、回転針で反射して第１受光素子に受光されるか、文字盤で反射して第１受光素子に受光されるかに変化する。これにより、第１受光素子の第１検出信号も変化し、回転部材の回転の計数が可能になる。なお、回転部材が多面体構造をなして回転部材の回転により発光素子から光の反射方向が変化することで第１受光素子の第１検出信号が変化するようにしてもよい。 In the electronic data conversion device according to claim 2, the light directed from the light emitting element to the rotary needle as the rotary member is reflected by the rotary needle and received by the first light receiving element, or reflected by the dial and reflected by the first light receiver. It changes to whether light is received by the element. Thereby, the first detection signal of the first light receiving element is also changed, and the rotation of the rotating member can be counted. The first detection signal of the first light receiving element may be changed by changing the reflection direction of the light from the light emitting element by rotation of the rotating member so that the rotating member has a polyhedral structure.

請求項３の電子データ化装置では、第１受光素子と第２受光素子とが、発光素子から同じ距離に位置するので、第１受光素子の第１検出信号と、第２受光素子の第２検出信号とに温度ドリフト成分が同様に重畳し、その温度ドリフト成分の補正が容易になる。 In the electronic data conversion device according to claim 3, since the first light receiving element and the second light receiving element are located at the same distance from the light emitting element, the first detection signal of the first light receiving element and the second detection signal of the second light receiving element. The temperature drift component is similarly superimposed on the detection signal, and the correction of the temperature drift component becomes easy.

請求項４の電子データ化装置では、第１受光素子を２つ備えて、それらの第１検出信号と閾値との大小関係が第１状態〜第４状態に切り替わる。そして、その第１状態〜第４状態の順番の変化を１サイクルとして回転針の１回転を計数するので、回転針の１回転を正確に読み取ることができ、この点においても流量計の計測結果を従来より精度よく電子データ化することが可能になる。また、この場合、請求項５の構成のように、第１状態〜第４状態の逆順の状態変化から回転針の逆回転を検出してもよく、そのような構成にすることで、流量計を細かく監視又は管理することができる。 In the electronic data conversion apparatus according to the fourth aspect, two first light receiving elements are provided, and the magnitude relationship between the first detection signal and the threshold value thereof is switched to the first state to the fourth state. And, since one rotation of the rotary needle is counted with the change of the order of the first state to the fourth state as one cycle, one rotation of the rotary needle can be accurately read. Also in this point, the measurement result of the flowmeter Can be converted to electronic data more accurately than before. In this case, as in the configuration according to claim 5, the reverse rotation of the rotary needle may be detected from the state change in the reverse order of the first state to the fourth state, and by using such a configuration, the flow meter Can be closely monitored or managed.

請求項６の電子データ化装置では、窓部を通して流量計のうち前述の回転部材以外の部位を視認することができる。また、本発明では、第１検出信号又は第２検出信号が基準値を超えたか否かに基づいて表示部内に外部から光が差し込んだ異常を検出して、計数部による計数を中断させるので、窓部を設けたことによる悪影響が抑えられる。なお、前述の回転部材以外の部位として、例えば別の回転部材や流量計の識別番号等が挙げられる。 In the electronic data system of the sixth aspect, it is possible to visually recognize a portion of the flow meter other than the above-mentioned rotating member through the window portion. Further, in the present invention, since an abnormality in which light is externally inserted into the display unit is detected based on whether the first detection signal or the second detection signal exceeds the reference value, the counting by the counting unit is interrupted. The adverse effect of providing the window can be suppressed. In addition, as a site | part other than the above-mentioned rotation member, the identification number of another rotation member, a flow meter, etc. are mentioned, for example.

請求項７の電子データ化装置では、第１受光素子より窓部の近い第２受光素子の第２検出信号に基づいて、表示部内に外部から光が差し込んだ異常を検出するので、異常検出の精度が向上する。 In the electronic data conversion device according to claim 7, the abnormality in which light is externally inserted into the display is detected based on the second detection signal of the second light receiving element closer to the window than the first light receiving element. Accuracy is improved.

本発明の第１実施形態に係る流量計の斜視図The perspective view of the flowmeter concerning a 1st embodiment of the present invention 流量計に電子データ化装置が取り付けられた状態の斜視図A perspective view of the flow meter with the electronic data generator attached 電子データ化装置の下面側の斜視図Lower surface side perspective view of the electronic data conversion apparatus 発光素子と第１及び第２の受光素子の位置関係を示した平面図Plan view showing the positional relationship between the light emitting element and the first and second light receiving elements 発光素子と第１及び第２の受光素子の位置関係を示した側断面図Side sectional view showing the positional relationship between the light emitting element and the first and second light receiving elements 第１及び第２の検出信号、状態判定信号等の変化を示したグラフGraph showing changes in first and second detection signals, state determination signals, etc. 第１及び第２の検出信号の変化を示したグラフGraph showing changes in first and second detection signals 電子データ化装置の回路図Circuit diagram of electronic data converter 水道水管理システムの概念図Conceptual diagram of tap water management system

［第１実施形態］
以下、本発明の第１実施形態を図１〜図９に基づいて説明する。図１に示された流量計９０は、例えば、一般的な住居に設定される水道メータであって、円筒状のケース本体９１に図示しない羽根車を収容して備える。そして、ケース本体９１から側方に張り出す１対の接続部９１Ａ，９１Ｂに水道管が接続されてケース本体９１内を水道水が流れ、その流れに応じて羽根車が回転する。 First Embodiment
Hereinafter, a first embodiment of the present invention will be described based on FIGS. 1 to 9. The flow meter 90 shown in FIG. 1 is, for example, a water meter set in a general residence, and is provided with a cylindrical case main body 91 accommodating an impeller (not shown). A water pipe is connected to a pair of connection portions 91A and 91B protruding laterally from the case body 91, and tap water flows in the case body 91, and the impeller rotates in accordance with the flow.

ケース本体９１のうち羽根車の上方には計量部９２が収容され、ケース本体９１の上端部に螺合装着された蓋体９３にて抜け止めされている。蓋体９３は、ケース本体９１の上端部に螺合する筒部９３Ａの内側にガラス板９３Ｂを張ってなる。そして、計量部９２の上端部がガラス板９３Ｂに内側から対向して流量計９０の表示部９４が構成されている。なお、ガラス板９３Ｂの上面は、筒部９３Ａの上面より下方に位置して、これにより蓋体９３の上部には筒部９３Ａに包囲された凹部９４Ｄが形成され、その凹部９４Ｄの底に表示部９４が配置されている。 The weighing unit 92 is accommodated above the impeller in the case main body 91, and is prevented from coming off by a lid 93 screwed to the upper end portion of the case main body 91. The lid 93 is formed by stretching a glass plate 93B inside a cylindrical portion 93A screwed to the upper end portion of the case main body 91. And the upper end part of the measurement part 92 opposes the glass plate 93B from inner side, and the display part 94 of the flowmeter 90 is comprised. The upper surface of the glass plate 93B is located below the upper surface of the cylindrical portion 93A, thereby forming a concave portion 94D surrounded by the cylindrical portion 93A at the top of the lid 93, and displaying on the bottom of the concave portion 94D The part 94 is arranged.

計量部９２は、ガラス板９３Ｂの内面に対して隙間を空けて対向する文字盤９５と、文字盤９５上で回転するパイロット９６及び回転針９７，９８と、文字盤９５に形成された矩形窓９５Ｗ内で回転する積算カウンタ９９とを有する。これらパイロット９６、回転針９７，９８、積算カウンタ９９は、本発明に係る「回転部材」に相当し、羽根車の回転に連動して回転する。また、羽根車の回転に対する減速比は、パイロット９６、一方の回転針９７、他方の回転針９８、そして、積算カウンタ９９の順番で大きくなっている。 The measuring unit 92 is a rectangular window formed on the dial 95, the pilot 96 and rotary hands 97 and 98 rotating on the dial 95, and the dial 95 opposed to the inner surface of the glass plate 93B with a gap. And an integration counter 99 rotating within 95 W. The pilot 96, the rotary needles 97 and 98, and the integration counter 99 correspond to the "rotating member" according to the present invention, and rotate in conjunction with the rotation of the impeller. Further, the reduction ratio with respect to the rotation of the impeller increases in the order of the pilot 96, one rotary needle 97, the other rotary needle 98, and the integration counter 99.

具体的には、パイロット９６は、ガラス板９３Ｂに向かって突出する正多角錐になっていて、例えば、羽根車が回転しているか否かの目視確認に使用される。回転針９７，９８は、中心軸部８９から三角形の片持ち梁状の針本体８８が水平に張り出した構造をなしている。そして、一方の回転針９７は、１０リットルの水道水が流量計９０を通過する間に１回転し、他方の回転針９８は、１００リットルの水道水が流量計９０を通過する間に１回転する。 Specifically, the pilot 96 is in the shape of a regular polygon that protrudes toward the glass plate 93B, and is used, for example, for visually confirming whether or not the impeller is rotating. The rotary needles 97 and 98 have a structure in which a triangular cantilever needle body 88 protrudes horizontally from the central shaft 89. And one rotation needle 97 makes one rotation while 10 liters of tap water passes the flow meter 90, and the other rotation needle 98 makes one rotation while 100 liters of tap water passes the flow meter 90. Do.

積算カウンタ９９は、共通の水平軸回りに回転する複数のリール９９Ａを横並びに配置してなり、それらリール９９Ａの外周面には０〜９の数字が均等に付されている。そして、回転針９８が１回転する度に、右端のリール９９Ａが１／１０回転すると共に、隣り合ったリール９９Ａ，９９Ａの間では、右側のリール９９Ａが１回転する度に左側のリール９９Ａが１／１０回転する。これにより、流量計９０を通過する水道水の積算流量が積算カウンタ９９によって表示される。 The integration counter 99 is formed by arranging a plurality of reels 99A rotating around a common horizontal axis side by side, and numerals 0 to 9 are uniformly attached to the outer peripheral surface of the reels 99A. Then, each time the rotary needle 98 rotates one turn, the right end reel 99A rotates 1/10, and between the adjacent reels 99A and 99A, the left reel 99A rotates each time the right reel 99A rotates one turn. Rotate 1/10. As a result, the integrated flow rate of tap water passing through the flow meter 90 is displayed by the integration counter 99.

文字盤９５は、中心からずれた位置で直線状に延びる境界部９５Ａを有し、境界部９５Ａを挟んで狭い側に積算カウンタ９９、広い側にパイロット９６及び回転針９７，９８が配置されている。また、パイロット９６は、境界部９５Ａの一端寄り位置に配置され、回転針９８は、境界部９５Ａの他端寄り位置に配置されている。そして、回転針９７は、パイロット９６及び回転針９８より境界部９５Ａから離れた位置に配置されている。 The dial 95 has a boundary portion 95A extending linearly at a position offset from the center, and an integration counter 99 is disposed on the narrow side across the boundary portion 95A, and a pilot 96 and rotary hands 97 and 98 are disposed on the wide side. There is. The pilot 96 is disposed at a position near one end of the boundary 95A, and the rotary needle 98 is disposed at a position near the other end of the boundary 95A. The rotary needle 97 is disposed at a position farther from the boundary 95A than the pilot 96 and the rotary needle 98.

文字盤９５には、回転針９７，９８の先端部の回動軌跡の略真下となる位置には、それぞれ円形線８７が付され、その円形線８７の内側に「０」〜「９」の目盛８６が付されている。また、一方の回転針９７の下の円形線８７の外側には１目盛が「１リットル」を意味する表示「１Ｌ」が付され、他方の回転針９８の下の円形線８７の外側には１目盛が「１０リットル」を意味する表示「１０Ｌ」が付されている。 A circular line 87 is attached to the dial 95 at a position substantially directly below the pivoting trajectory of the tip of the rotary hands 97 and 98, and "0" to "9" are provided inside the circular line 87. A scale 86 is attached. In addition, on the outside of the circular line 87 below one rotary needle 97, an indication "1 L" is attached, which means that one scale means "1 liter", and on the outer side of the circular line 87 below the other rotary needle 98. The indication "10 L" is attached, meaning that "1 scale" means "10 liters".

蓋体９３の筒部９３Ａの外周面からは四方に側面突部９３Ｃが張り出し、それらのうちの１つの側面突部９３Ｃに穿孔された支持孔９３Ｄに図示しない回転扉が回動可能に取り付けられて、表示部９４を上方から覆うことができるようになっている。 Side projections 93C extend in four directions from the outer peripheral surface of the cylindrical portion 93A of the lid 93, and a rotating door (not shown) is rotatably attached to a support hole 93D formed in one of the side projections 93C. Thus, the display unit 94 can be covered from above.

図２に示すように、本実施形態の電子データ化装置１０は、回転扉が外された状態の流量計９０の上面に重ねられるベース部１１を備える。ベース部１１は、例えば、樹脂の成形品であって全体が円板状をなしている。 As shown in FIG. 2, the electronic data conversion device 10 of the present embodiment includes a base portion 11 which is superimposed on the upper surface of the flow meter 90 in a state in which the rotating door is removed. The base portion 11 is, for example, a molded article of resin, and the entire portion has a disk shape.

図３に示すように、ベース部１１の下面の外縁寄り位置には、ベース部１１の外周面と同心の円形の段差面１２Ｄが形成され、その段差面１２Ｄの内側の陥没部１２の中央には、段差面１２Ｄと同心の中央孔１３が形成されている。また、図２に示すように、中央孔１３には、その中心からずれた位置を横切る架橋部１４（図２参照）が備えられ、中央孔１３のうち架橋部１４を挟んで広い側が窓部１５をなし、狭い側が基板収容部１６になっている。そして、窓部１５を通して流量計９０の表示部９４を視認することができる。 As shown in FIG. 3, a circular step surface 12D concentric with the outer peripheral surface of the base portion 11 is formed at a position near the outer edge of the lower surface of the base portion 11, and the center of the depressed portion 12 inside the step surface 12D is formed. A center hole 13 concentric with the step surface 12D is formed. Further, as shown in FIG. 2, the central hole 13 is provided with a bridge portion 14 (see FIG. 2) crossing a position shifted from the center thereof, and the wider side of the central hole 13 across the bridge portion 14 is a window portion. The narrow side is the substrate accommodation portion 16. Then, the display unit 94 of the flow meter 90 can be visually recognized through the window unit 15.

陥没部１２の下面には、基板収容部１６を閉塞するように基板支持部１７が形成されている。図３に示すように、基板支持部１７は、基板収容部１６より一回り大きな三日月状をなし、その外縁部が陥没部１２の下面における基板収容部１６の外縁部に重なるように陥没部１２の下面に一体形成されている。また、基板支持部１７には、その両端の角部を除く全体の下面を段付き状に陥没させて陥没部１７Ａが形成されている。そして、陥没部１７Ａの外形と同一の外形を有する環状のグロメット１８が、陥没部１７Ａに嵌めこまれた状態にモールド成形されるか接着剤にて固定され、基板支持部１７の下面から突出している。 A substrate support portion 17 is formed on the lower surface of the depressed portion 12 so as to close the substrate accommodation portion 16. As shown in FIG. 3, the substrate supporting portion 17 has a crescent shape which is a size larger than the substrate containing portion 16, and the depressed portion 12 has an outer edge overlapping the outer edge of the substrate receiving portion 16 on the lower surface of the depressed portion 12. Is integrally formed on the lower surface of the Further, a recess 17A is formed in the substrate support portion 17 by recessing the entire lower surface excluding the corner portions at both ends in a stepped shape. Then, an annular grommet 18 having the same outer shape as the outer shape of the depressed portion 17A is molded or fixed with an adhesive in a state of being fitted into the depressed portion 17A and protruded from the lower surface of the substrate support 17 There is.

基板支持部１７には、グロメット１８を介して下方に臨む矩形の貫通孔１９が形成されている。そして、図２に示すように、貫通孔１９を閉塞するように基板支持部１７の上面に回路基板２０が重ねられている。また、基板支持部１７から支柱１７Ｊが起立して回路基板２０の取付孔を貫通しかつ熱カシメされて、回路基板２０がベース部１１に固定されている。なお、ベース部１１の上面のうち基板収容部１６の近傍位置には、バッテリーボックス１１Ｂが固定され、回路基板２０は、そのバッテリーボックス１１Ｂ内のバッテリーから給電されて作動する。 The substrate support portion 17 is formed with a rectangular through hole 19 facing downward through the grommet 18. Then, as shown in FIG. 2, the circuit board 20 is superimposed on the upper surface of the board support portion 17 so as to close the through hole 19. In addition, the support column 17J is erected from the substrate support portion 17 and penetrates the mounting hole of the circuit board 20 and is thermally caulked so that the circuit board 20 is fixed to the base portion 11. The battery box 11B is fixed at a position near the substrate accommodation portion 16 on the upper surface of the base portion 11, and the circuit board 20 operates by receiving power from the battery in the battery box 11B.

回路基板２０を詳説する前に、電子データ化装置１０の流量計９０に対する固定方法について説明する。電子データ化装置１０を流量計９０に固定するには、ベース部１１の下面の陥没部１２（図３参照）内に流量計９０の筒部９３Ａ（図２参照）の上端部を嵌合し、架橋部１４（図２参照）を表示部９４の境界部９５Ａ（図１参照）に平行に配置しかつ、窓部１５を表示部９４の積算カウンタ９９に対向配置する。すると、グロメット１８が、表示部９４のガラス板９３Ｂの上面に密着し、貫通孔１９を介して回路基板２０が表示部９４の回転針９７に対向した状態になる。この状態で、回路基板２０が流量計９０に例えば接着剤にて固定される。 Before the circuit board 20 is described in detail, a method of fixing the electronic data converter 10 to the flow meter 90 will be described. In order to fix the electronic data conversion device 10 to the flowmeter 90, the upper end of the cylindrical portion 93A (see FIG. 2) of the flowmeter 90 is fitted in the recess 12 (see FIG. 3) of the lower surface of the base portion 11. The bridge portion 14 (see FIG. 2) is disposed parallel to the boundary portion 95A (see FIG. 1) of the display portion 94, and the window portion 15 is disposed to face the integration counter 99 of the display portion 94. Then, the grommet 18 is in close contact with the upper surface of the glass plate 93 B of the display unit 94, and the circuit board 20 faces the rotary needle 97 of the display unit 94 through the through hole 19. In this state, the circuit board 20 is fixed to the flow meter 90 by, for example, an adhesive.

以下、電子データ化装置１０が流量計９０に上記の如く固定された状態を前提にして、回路基板２０について説明する。図３に示すように、回路基板２０の下面には、発光素子３０と１対の第１受光素子３１，３２と第２受光素子３３とが実装されている。 Hereinafter, the circuit board 20 will be described on the assumption that the electronic data conversion device 10 is fixed to the flow meter 90 as described above. As shown in FIG. 3, the light emitting element 30, a pair of first light receiving elements 31 and 32, and a second light receiving element 33 are mounted on the lower surface of the circuit board 20.

発光素子３０は、例えば、ＬＥＤであって、下面に発光面を有する。また、第１受光素子３１，３２及び第２受光素子３３の３つの受光素子は、例えば、同一構造、同一性能のフォトダイオードであって下面に受光面を有する。そして、発光素子３０，第１受光素子３１，３２及び第２受光素子３３は、上記バッテリーから常時受電していて、発光素子３０が出射した光の反射光を第１受光素子３１，３２及び第２受光素子３３が受光し、それら受光強度に応じた検出信号を出力する。 The light emitting element 30 is, for example, an LED, and has a light emitting surface on the lower surface. Further, the three light receiving elements of the first light receiving elements 31 and 32 and the second light receiving element 33 are, for example, photodiodes having the same structure and the same performance, and have light receiving surfaces on the lower surface. The light emitting element 30, the first light receiving elements 31 and 32, and the second light receiving element 33 are constantly receiving power from the battery, and the reflected light of the light emitted from the light emitting element 30 is reflected by the first light receiving elements 31 and 32, 2 The light receiving element 33 receives light, and outputs a detection signal according to the light reception intensity.

図４には、回路基板２０を透視して、発光素子３０、第１受光素子３１，３２及び第２受光素子３３を、上方から表示部９４に重ねて見た状態が示されている。同図に示すように発光素子３０、第１受光素子３１，３２及び第２受光素子３３は、平面形状が略四角形をなし、それら四角形の縦横の辺は、架橋部１４（図２参照）と平行又は垂直になっている。また、図５に示すように、発光素子３０の発光面と、第１受光素子３１，３２、第２受光素子３３の受光面とは、何れもガラス板９３Ｂの上面に略平行になって隣接し、表示部９４内に向けられている。そして、第１受光素子３１，３２は、回転針９７の回転位置に応じて回転針９７での反射光か、文字盤９５での反射光かを受光する位置に配置され、第２受光素子３３は、回転針９７の回転位置に拘わらず実質的に回転針９７での反射光を受光せず、文字盤９５での反射光を受光する位置に配置されている。 FIG. 4 shows a state in which the light emitting element 30, the first light receiving elements 31, 32 and the second light receiving element 33 are viewed from above on the display unit 94 through the circuit board 20 in a transparent manner. As shown in the figure, the light emitting element 30, the first light receiving elements 31, 32 and the second light receiving element 33 have a substantially square planar shape, and the vertical and horizontal sides of these squares form the bridge portion 14 (see FIG. 2). It is parallel or perpendicular. Further, as shown in FIG. 5, the light emitting surface of the light emitting element 30, and the light receiving surfaces of the first light receiving elements 31, 32 and the second light receiving element 33 are adjacent to each other substantially parallel to the upper surface of the glass plate 93B. And directed into the display unit 94. The first light receiving elements 31 and 32 are disposed at positions to receive reflected light from the rotary hand 97 or reflected light from the dial 95 according to the rotational position of the rotary hand 97, and the second light receiving element 33. Is disposed at a position where light reflected by the dial 95 is not substantially received regardless of the rotational position of the rotary hand 97 and light reflected by the dial 95 is received.

より具体的には、図４に示すように、発光素子３０は、回転針９７の回転領域Ｒ１内における外縁部のうち回転針９７の回転中心Ｐ１から架橋部１４（図２参照）と平行にパイロット９６（図１参照）側に移動した位置に対向配置されている。換言すれば、発光素子３０は、回転針９７の回転領域Ｒ１の下方の目盛８６の「７」と「８」との間の中央位置に対向配置されている。 More specifically, as shown in FIG. 4, the light emitting element 30 is parallel to the bridge portion 14 (see FIG. 2) from the rotation center P1 of the rotary needle 97 at the outer edge in the rotary region R1 of the rotary needle 97. It is arranged opposite to the position moved to the side of the pilot 96 (see FIG. 1). In other words, the light emitting element 30 is disposed opposite to the central position between “7” and “8” of the scale 86 below the rotation area R1 of the rotary needle 97.

第２受光素子３３は、前述の回転領域Ｒ１の外側の近傍領域Ｒ２に対向しかつ、発光素子３０の近傍で発光素子３０より窓部１５（図２参照）側にずらして配置されている。 The second light receiving element 33 is opposed to the near area R2 outside the above-described rotation area R1 and is disposed closer to the window 15 (see FIG. 2) than the light emitting element 30 in the vicinity of the light emitting element 30.

第１受光素子３１，３２は、回転領域Ｒ１のうち発光素子３０より中心寄りで、発光素子３０の中心３０Ｃと回転針９７の回転中心Ｐ１とを結ぶ直線ＣＬ１に対して左右対称に配置されている。また、第１受光素子３１，３２は、互いに隣接していて、例えば、発光素子３０と第１受光素子３１，３２とが、真上から見て、同時に回転針９７の針本体８８の一部に重なり得る位置に配置されている。そして、回転針９７が図４の時計回りに回転し、一方の第１受光素子３１のみが回転針９７に対向した状態と、両方の第１受光素子３１，３２が回転針９７に対向した状態と、他方の第１受光素子３２のみが回転針９７に対向した状態と、両方の第１受光素子３１，３２が回転針９７に対向しない状態とに変化する。また、第１受光素子３１，３２の中心３１Ｃ，３２Ｃと第２受光素子３３の中心３３Ｃとは、発光素子３０の中心３０Ｃを中心とする共通の円Ｃ１０の上に配置されている。 The first light receiving elements 31 and 32 are disposed symmetrically with respect to a straight line CL1 connecting the center 30C of the light emitting element 30 and the rotation center P1 of the rotary needle 97 closer to the center than the light emitting element 30 in the rotation region R1. There is. The first light receiving elements 31 and 32 are adjacent to each other. For example, when the light emitting element 30 and the first light receiving elements 31 and 32 are viewed from directly above, a part of the needle main body 88 of the rotary needle 97 simultaneously. It is placed at a position where it can overlap. The rotary needle 97 rotates clockwise in FIG. 4 so that only one of the first light receiving elements 31 faces the rotary needle 97 and the first light receiving elements 31 and 32 face the rotary needle 97. The state changes in a state in which only the other first light receiving element 32 faces the rotary needle 97 and a state in which both the first light receiving elements 31 and 32 do not face the rotary needle 97. The centers 31C and 32C of the first light receiving elements 31 and 32 and the center 33C of the second light receiving element 33 are disposed on a common circle C10 centered on the center 30C of the light emitting element 30.

上記配置により、上述の如く、第１受光素子３１，３２は、回転針９７の回転位置に応じて回転針９７での反射光か、文字盤９５での反射光かを受光し、第２受光素子３３は、回転針９７の回転位置に拘わらず実質的に回転針９７での反射光を受光せず、文字盤９５での反射光のみを受光する。 According to the above arrangement, as described above, the first light receiving elements 31, 32 receive the reflected light from the rotary needle 97 or the reflected light from the dial 95 according to the rotational position of the rotary needle 97, and the second light reception The element 33 does not substantially receive the reflected light from the rotary needle 97 regardless of the rotational position of the rotary hand 97, and receives only the reflected light from the dial 95.

これにより、電子データ化装置１０が外乱を受けていない状態では、図６（Ａ）に示すように、第２受光素子３３の第２検出信号は、回転針９７の回転位置に拘わらず、第２受光素子３３が受光する発光素子３０からの光の文字盤９５における反射光の強度と同様に一定になる。これに対し、図６（Ｂ）及び図６（Ｃ）に示すように、両第１受光素子３１，３２の第１検出信号は、回転針９７が１回転する度に、その回転位置に応じて徐々に大きくなってから徐々に小さくなる１つの検出波Ｗ１が生じるように変化する。また、図６（Ｂ）に示した一方の第１受光素子３１の第１検出信号の検出波Ｗ１と、図６（Ｃ）に示した他方の第１受光素子３２の第１検出信号の検出波Ｗ１とは、部分的に重複するように発生する。なお、図６のグラフにおける横軸は、回転針９７の回転位置［θ］を示している。 Thus, when the electronic data conversion device 10 is not disturbed, as shown in FIG. 6A, the second detection signal of the second light receiving element 33 does not depend on the rotational position of the rotary needle 97. The light intensity of the light from the light emitting element 30 received by the light receiving element 33 becomes constant in the same manner as the intensity of the reflected light on the dial 95. On the other hand, as shown in FIGS. 6 (B) and 6 (C), the first detection signals of both the first light receiving elements 31 and 32 correspond to their rotational positions each time the rotary needle 97 makes one rotation. It changes so that one detection wave W1 which becomes small gradually after becoming large gradually is produced. Further, the detection wave W1 of the first detection signal of one first light receiving element 31 shown in FIG. 6 (B) and the detection of the first detection signal of the other first light receiving element 32 shown in FIG. 6 (C) The wave W1 is generated so as to partially overlap. The horizontal axis in the graph of FIG. 6 indicates the rotational position [θ] of the rotary needle 97.

ところで、電子データ化装置１０が、例えば温度変化を外乱として受けると、発光素子３０が出射する光の強度が変化し、その影響を受けて第１検出信号と第２検出信号とに温度ドリフト成分が重畳する。具体的には、図７（Ａ）〜図７（Ｃ）に示すように、電子データ化装置１０の温度が徐々に下がると、発光素子３０から出射される光の強度が徐々に低くなり、第１受光素子３１，３２の第１検出信号と、第２受光素子３３の第２検出信号とが同じように徐々に大きくなる一方、電子データ化装置１０の温度が徐々に上昇すると、発光素子３０から出射される光の強度が徐々に高くなり、第１受光素子３１，３２の第１検出信号と、第２受光素子３３の第２検出信号とが同じように徐々に小さくなる。なお、図７のグラフにおける横軸は、時間を示している。 By the way, when the electronic data conversion device 10 receives, for example, a temperature change as a disturbance, the intensity of the light emitted from the light emitting element 30 changes, and the temperature drift component is affected by the influence thereof to the first detection signal and the second detection signal. Is superimposed. Specifically, as shown in FIGS. 7A to 7C, when the temperature of the electronic data conversion device 10 gradually decreases, the intensity of light emitted from the light emitting element 30 gradually decreases. When the first detection signal of the first light receiving element 31, 32 and the second detection signal of the second light receiving element 33 increase gradually in the same manner, when the temperature of the electronic data conversion device 10 gradually increases, the light emitting element The intensity of light emitted from the light source 30 gradually increases, and the first detection signal of the first light receiving elements 31 and 32 and the second detection signal of the second light receiving element 33 gradually decrease in the same manner. The horizontal axis in the graph of FIG. 7 indicates time.

回路基板２０には、発光素子３０等以外に図８に示した信号処理回路３４、無線回路３９等が実装されている。また、信号処理回路３４には、第１判定回路３５、第２判定回路３７、補正回路３６及びマイコン３８等が含まれ、これらが上記した第１検出信号と第２検出信号とに基づいて回転針９７の回転を計数する。 On the circuit board 20, the signal processing circuit 34 and the radio circuit 39 shown in FIG. 8 are mounted in addition to the light emitting element 30 and the like. Further, the signal processing circuit 34 includes a first determination circuit 35, a second determination circuit 37, a correction circuit 36, a microcomputer 38 and the like, which rotate based on the above-described first detection signal and second detection signal. Count the rotation of the needle 97.

第１判定回路３５は、予め設定された上基準値と下基準値と第２受光素子３３の第２検出信号とを比較する２つのコンパレータを有し、第２検出信号が温度ドリフト成分を超えて上基準値より大きくなったか下基準値より小さくなったかを判定して、例えば、２ビットの異常判定信号を出力する。具体的には、第２検出信号が温度ドリフト成分を超えて上基準値より大きくなった場合には、［１０］の異常判定信号を出力し、第２検出信号が温度ドリフト成分を超えて下基準値より小さくなった場合には、［０１］の異常判定信号を出力し、第２検出信号が下基準値以上、上基準値以下に収まっている場合には、［００］の異常判定信号を出力する。なお、［１０］の異常判定信号が出力される例としては、何者かが不正に窓部１５内をＬＥＤライトで照らして、回転針９７側へと光が差し込んだ場合が考えられ、［０１］の異常判定信号が出力される例としては、発光素子３０が接触不良等によって点滅する場合が考えられる。 The first determination circuit 35 includes two comparators that compare the preset upper reference value and lower reference value with the second detection signal of the second light receiving element 33, and the second detection signal exceeds the temperature drift component. It is determined whether it is larger than the upper reference value or smaller than the lower reference value, and a 2-bit abnormality determination signal is output, for example. Specifically, when the second detection signal exceeds the temperature drift component and becomes larger than the upper reference value, the abnormality determination signal of [10] is output, and the second detection signal falls below the temperature drift component. When it becomes smaller than the reference value, the abnormality determination signal of [01] is output, and when the second detection signal is above the lower reference value and smaller than the upper reference value, the abnormality determination signal of [00] Output As an example in which the abnormality determination signal of [10] is output, it is conceivable that someone illegally illuminates the inside of the window portion 15 with the LED light, and light is inserted to the rotary needle 97 side, [01 As an example in which the abnormality determination signal of] is output, the case where the light emitting element 30 blinks due to contact failure etc. can be considered.

補正回路３６は、本発明の「補正部」に相当し、第１受光素子３１，３２の各第１検出信号と第２受光素子３３の第２検出信号とを取り込み、各第１検出信号に対する第２検出信号との電位差を出力する。これにより、図７（Ｂ）と図７（Ｃ）に示した温度ドリフト成分を含む各第１検出信号が、図７（Ｄ）と図７（Ｅ）に示した温度ドリフト成分を除去された第１検出信号へと補正される。また、温度ドリフト成分以外にも、例えば、発光素子３０の「ちらつき」によるノイズが第１検出信号及び第２検出信号のそれぞれに重畳した場合も、そのようなノイズが補正回路３６により除去される。 The correction circuit 36 corresponds to the “correction unit” of the present invention, and takes in the first detection signals of the first light receiving elements 31, 32 and the second detection signal of the second light receiving element 33, The potential difference with the second detection signal is output. Thus, each first detection signal including the temperature drift component shown in FIGS. 7B and 7C has the temperature drift component shown in FIGS. 7D and 7E removed. It is corrected to the first detection signal. In addition to the temperature drift component, for example, even when noise due to “flickering” of the light emitting element 30 is superimposed on each of the first detection signal and the second detection signal, such noise is removed by the correction circuit 36 .

第２判定回路３７は、補正回路３６による補正後の第１受光素子３１，３２の各第１検出信号と閾値とを比較する２つのコンパレータを有する。その閾値は、図６（Ｄ）と図６（Ｅ）に示すように、補正後の第１受光素子３１，３２の両第１検出信号の検出波Ｗ１，Ｗ１の重複部分におけるピークレベルＶｐより小さく、両第１検出信号の検出波Ｗ１，Ｗ１以外の平坦部のレベルより大きな値に設定されている。そして、一方の第１検出信号と閾値との比較結果（図６（Ｆ）参照）と、他方の第１検出信号と閾値との比較結果（図６（Ｇ）参照）とから、２ビットの状態判定信号（図６（Ｈ））を生成して出力する。 The second determination circuit 37 has two comparators that compare the first detection signals of the first light receiving elements 31 and 32 corrected by the correction circuit 36 with the threshold. The threshold value is, as shown in FIG. 6D and FIG. 6E, from the peak level Vp in the overlapping portion of the detection waves W1 and W1 of the first detection signals of both the first light receiving elements 31 and 32 after correction. It is set smaller than the level of the flat portion other than the detection waves W1 and W1 of both first detection signals. Then, based on the comparison result between one first detection signal and the threshold (see FIG. 6F) and the comparison result between the other first detection signal and the threshold (see FIG. 6G), two bits are used. A state determination signal (FIG. 6 (H)) is generated and output.

具体的には、第２判定回路３７は、一方の第１受光素子３１の第１検出信号のみが閾値を超える第１状態を意味する[１０]の状態判定信号と、両方の第１受光素子３１，３２の第１検出信号が閾値を超える第２状態を意味する［１１］の状態判定信号と、他方の第１受光素子３２の第１検出信号のみが閾値を超える第３状態を意味する［０１］の状態判定信号と、両方の第１受光素子３１，３２の第１検出信号が閾値を超えない第４状態を意味する［００］の状態判定信号とを出力する。 Specifically, in the second determination circuit 37, the state determination signal of [10], which means the first state in which only the first detection signal of one of the first light receiving elements 31 exceeds the threshold, and both of the first light receiving elements A state determination signal of [11], which means a second state in which the first detection signal of 31, 32 exceeds the threshold value, and a third state in which only the first detection signal of the other first light receiving element 32 exceeds the threshold value A state determination signal of [01] and a state determination signal of [00] meaning a fourth state in which the first detection signals of both first light receiving elements 31 and 32 do not exceed the threshold are output.

マイコン３８は、ＣＰＵ，ＲＯＭ，ＲＡＭをパッケージにして備え、ＲＯＭに記憶されたプログラムを所定周期で繰り返して実行することで、図８にブロック図として示した計数部４１、異常処理部４２、通信制御部４３、記憶部４４等として機能する。 The microcomputer 38 includes a CPU, a ROM, and a RAM as a package, and repeatedly executes a program stored in the ROM at a predetermined cycle, thereby the counting unit 41, the abnormality processing unit 42, and the communication shown as a block diagram in FIG. The control unit 43 functions as the storage unit 44 and the like.

計数部４１は、第２判定回路３７が出力する状態判別信号が、「１０」、「１１」、「０１」、「００」の順番を１サイクルとして変化したことを条件にして、その１サイクルを回転針９７の１回転として検出する。詳細には、計数部４１は、状態判別信号が「００」になってから、「１０」、「１１」、「０１」の順番で変化し、再び「００」に戻った時点までを回転針９７の１回転として検出する。このようにして、電子データ化装置１０による流量の計測結果である回転針９７の回転が電子データ化される。また、計数部４１は、カウンタを有し、回転針９７の１回転を検出する毎に、１つカウンタをインクリメントして回転針９７の積算回転数を計数する。また、計数部４１は、本発明に係る「逆回転検出部」としても機能する。即ち、計数部４１は、状態判別信号が「１１」から「１０」又は、「０１」から「１１」又は、「００」から「０１」又は、「１０」から「００」に変化した場合に、これを「回転針９７の逆回転」として検出し、さらには、「００」、「０１」、「１１」、「１０」の順番を１サイクルとして変化したことを条件に回転針９７の逆回転の積算回転数も計数する。そして、計数部４１は、カレンダー機能を有し、一月毎に回転針９７の積算回転数を演算して記憶部４４に記憶すると共に、併せて、回転針９７の逆回転の有無と、逆回転の積算回転数を記憶部４４に記憶する。なお、計数部４１は、前述の第１判定回路３５及び次述する異常処理部４２が異常ありと判断している間は計数を中断し、その異常が解消した場合には、計数を再開する。例えば、水道水が逆流方向に通水されている場合には、状態判別信号が「００」、「０１」、「１１」、「１０」、「００」の順番で変化するので、異常処理部４２は、これを異常と判断する。このように、回転針９７の正転、逆転も検知し、積算回転数の誤演算を防ぐことができる。また、本実施形態では、第１判定回路３５と異常処理部４２とが本発明に係る「異常検出部」に相当する。 The counting unit 41 performs one cycle of the state determination signal output from the second determination circuit 37 on the condition that the order of “10”, “11”, “01”, and “00” is changed as one cycle. Is detected as one rotation of the rotary needle 97. In detail, after the state determination signal becomes "00", the counting unit 41 changes in the order of "10", "11", and "01", and the rotary needle until it returns to "00" again Detected as one rotation of 97. Thus, the rotation of the rotary needle 97, which is the measurement result of the flow rate by the electronic data conversion device 10, is converted to electronic data. In addition, the counting unit 41 has a counter, and increments the counter by 1 each time it detects one rotation of the rotary needle 97 to count the integrated rotation number of the rotary needle 97. The counting unit 41 also functions as a "reverse rotation detection unit" according to the present invention. That is, when the state determination signal changes from “11” to “10” or “01” to “11” or “00” to “01” or “10” to “00”, the counting unit 41 This is detected as "reverse rotation of the rotary needle 97", and the reverse of the rotary needle 97 is performed on the condition that the order of "00", "01", "11" and "10" is changed as one cycle. The integrated number of revolutions is also counted. The counting unit 41 has a calendar function, calculates the integrated number of revolutions of the rotary needle 97 every month, stores it in the storage unit 44, and additionally determines whether or not the rotary needle 97 is reversely rotated. The integrated rotation number of rotation is stored in the storage unit 44. The counting unit 41 suspends counting while the first determination circuit 35 described above and the abnormality processing unit 42 described below determine that there is an abnormality, and restarts the counting when the abnormality is resolved. . For example, when tap water is supplied in the reverse direction, the state determination signal changes in the order of "00", "01", "11", "10", and "00". 42 judges that this is abnormal. In this manner, forward rotation and reverse rotation of the rotary needle 97 can also be detected, and erroneous calculation of the integrated rotation speed can be prevented. Further, in the present embodiment, the first determination circuit 35 and the abnormality processing unit 42 correspond to the “error detection unit” according to the present invention.

異常処理部４２は、判別信号の１サイクルの順番が、「１０」、「１１」、「０１」、「００」から変化した場合にそれを異常と判断して、その異常の発生日時を記憶部４４に記憶する。また、前述の第１判定回路３５が異常を意味する［１０］か［０１］の異常判定信号を出力している場合もその異常の発生日時を記憶部４４に記憶する。 When the order of one cycle of the determination signal changes from “10”, “11”, “01”, “00”, the abnormality processing unit 42 determines that it is abnormal, and stores the date and time of occurrence of the abnormality. It is stored in the unit 44. Also, when the above-mentioned first determination circuit 35 outputs an abnormality determination signal of [10] or [01] indicating an abnormality, the storage date and time of the abnormality is stored in the storage unit 44.

通信制御部４３は、電子データ化装置１０毎に設定された識別番号と共に、計数部４１が演算した一月当りの回転針９７の積算回転数と、その計測月を特定する日付データとを基地局（図９参照）に無線送信する。また、通信制御部４３は、異常処理部４２が記憶した異常情報を、それら異常発生時に基地局に無線送信する。 The communication control unit 43, together with the identification number set for each electronic data conversion device 10, the integrated number of revolutions of the rotary needle 97 per month calculated by the counting unit 41, and date data for specifying the measurement month. It wirelessly transmits to the station (see FIG. 9). In addition, the communication control unit 43 wirelessly transmits the abnormality information stored in the abnormality processing unit 42 to the base station when the abnormality occurs.

なお、図９に示すように、基地局に無線送信されたデータは、インターネット等の通信ネットワークを介してクラウドサーバーに取り込まれる。そして、水道網を管理する事業体がクラウドサーバーにアクセスして水道使用量を管理する。 As shown in FIG. 9, data wirelessly transmitted to the base station is taken into a cloud server via a communication network such as the Internet. Then, the business entity managing the water network accesses the cloud server to manage the water consumption.

本実施形態の電子データ化装置１０の構成に関する説明は以上である。次に、この電子データ化装置１０の作用効果について説明する。上記したように本実施形態の電子データ化装置１０は、第１受光素子３１，３２を２つ備えて、それらの両第１検出信号と閾値との大小関係が第１状態〜第４状態の順番で変化したことを１サイクルとして回転針の１回転を計数するので、回転針９７の１回転を正確に読み取ることができ、流量計９０の計測結果を従来より精度よく電子データ化することが可能になる。 The description of the configuration of the electronic data conversion device 10 of the present embodiment is as described above. Next, the operation and effect of the electronic data conversion device 10 will be described. As described above, the electronic data conversion device 10 according to the present embodiment includes the two first light receiving elements 31 and 32, and the magnitude relationship between the two first detection signals and the threshold values thereof is in the first to fourth states. Since one rotation of the rotary needle is counted with one cycle being changed, it is possible to accurately read one rotation of the rotary needle 97, and electronic data conversion of the measurement result of the flowmeter 90 can be performed more accurately than before. It will be possible.

しかも、第１受光素子３１，３２とは別個に備えた第２受光素子３３にて、流量計９０の表示部９４内の文字盤９５（不動部分）における発光素子３０から光の反射光を受光し、その第２受光素子３３の第２検出信号の変化に基づいて第１受光素子３１，３２の第１検出信号の変化から温度ドリフト成分を差し引く補正を行うので、温度変化の影響が抑えられ、流量計９０の計測結果を従来より精度よく電子データ化することが可能になる。 Moreover, the second light receiving element 33 provided separately from the first light receiving elements 31 and 32 receives the reflected light of the light from the light emitting element 30 on the dial 95 (immobile portion) in the display unit 94 of the flow meter 90 And the correction of subtracting the temperature drift component from the change of the first detection signal of the first light receiving element 31, 32 based on the change of the second detection signal of the second light receiving element 33, the influence of the temperature change is suppressed. As a result, it becomes possible to convert the measurement result of the flow meter 90 into electronic data more accurately than ever.

また、発光素子３０から第２受光素子３３までの距離と、発光素子３０から第１受光素子３１，３２までの距離とを同じにしたので、第１受光素子３１，３２の第１検出信号と、第２受光素子３３の第２検出信号とに温度ドリフト成分が同様に重畳し、その温度ドリフト成分の補正が容易になる。 In addition, since the distance from the light emitting element 30 to the second light receiving element 33 and the distance from the light emitting element 30 to the first light receiving elements 31 and 32 are the same, the first detection signal of the first light receiving elements 31 and 32 Similarly, a temperature drift component is superimposed on the second detection signal of the second light receiving element 33, and the correction of the temperature drift component becomes easy.

さらには、電子データ化装置１０のベース部１１に備えた窓部１５を通して流量計９０の積算カウンタ９９を目視することができ、これにより、流量計９０の実際の計量結果と電子データ化した計測結果とを比較して電子データ化の精度を確認することができる。 Furthermore, the integration counter 99 of the flow meter 90 can be visually observed through the window portion 15 provided in the base portion 11 of the electronic data conversion system 10, whereby the actual measurement result of the flow meter 90 and the measurement converted to electronic data The accuracy of the electronic data conversion can be confirmed by comparing the results.

また、窓部１５から光が差し込んで異常が発生し得るが、そのような異常を検出して、計数部４１による計数を中断させるので、窓部を設けたことによる悪影響が抑えられる。また、その異常検出は、第１受光素子３１，３２より窓部１５の近い第２受光素子３３の第２検出信号に基づいて行われるので、高い精度で異常検出を行うことができる。 Further, although light may be inserted from the window portion 15 and an abnormality may occur, such an abnormality is detected and the counting by the counting portion 41 is interrupted, so that the adverse effect due to the provision of the window portion can be suppressed. Further, since the abnormality detection is performed based on the second detection signal of the second light receiving element 33 closer to the window portion 15 than the first light receiving elements 31 and 32, the abnormality detection can be performed with high accuracy.

［第２実施形態］
本実施形態の電子データ化装置は、図示しないが前記第１実施形態の電子データ化装置１０から第１受光素子３２を排除し、それ以外は、第１実施形態の電子データ化装置１０ど同様な構成になっている。そして、本実施形態の電子データ化装置１０では、第２判定回路３７が、第１受光素子３１の第１検出信号と閾値との比較から１ビットの状態判別信号を生成する。また、計数部４１は、状態判別信号が［０］、［１］の順番で変わったことを１サイクルとして回転針９７の１回転を計数する。このような構成としても、第１実施形態と同様に温度変化の影響が抑えられ、流量計９０の計測結果を従来より精度よく電子データ化することが可能になる。 Second Embodiment
Although the electronic data conversion device of the present embodiment does not show the figure, the first light receiving element 32 is excluded from the electronic data conversion device 10 of the first embodiment, and the other parts are the same as the electronic data conversion device 10 of the first embodiment. The configuration is Then, in the electronic data conversion device 10 of the present embodiment, the second determination circuit 37 generates a 1-bit state determination signal from the comparison between the first detection signal of the first light receiving element 31 and the threshold value. Further, the counting unit 41 counts one rotation of the rotary needle 97 with one cycle that the state determination signal has changed in the order of [0] and [1]. Even with such a configuration, the influence of the temperature change can be suppressed as in the first embodiment, and it becomes possible to convert the measurement result of the flowmeter 90 into electronic data more accurately than in the prior art.

［第３実施形態］
本実施形態の電子データ化装置は、図示しないが、第１実施形態で説明した発光素子３０がパイロット９６の側面に向けて光を出射し、パイロット９６の回転により第１受光素子３１がパイロット９６からの反射光を受光したり、しなかったりするようになっている。そして、計数部４１は、第２判定回路３７が生成した状態判別信号に含まれるパルス波がパイロット９６の側面の数と同じ数だけカウントされたことをパイロット９６の１回転として計数する。その他の構成は、第１及び第２の実施形態と同様である。 Third Embodiment
In the electronic data conversion apparatus of this embodiment, although not shown, the light emitting element 30 described in the first embodiment emits light toward the side surface of the pilot 96, and the rotation of the pilot 96 causes the first light receiving element 31 to be a pilot 96. It is designed to receive or not to reflect light from light sources. The counting unit 41 counts, as one rotation of the pilot 96, that the pulse waves included in the state determination signal generated by the second determination circuit 37 have been counted by the same number as the number of side surfaces of the pilot 96. The other configuration is the same as in the first and second embodiments.

［他の実施形態］
本発明は、前記実施形態に限定されるものではなく、例えば、以下に説明するような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。 [Other embodiments]
The present invention is not limited to the above-described embodiment, and, for example, the embodiments described below are also included in the technical scope of the present invention, and various other variations are possible without departing from the scope of the invention. It can be changed and implemented.

（１）前記実施形態の電子データ化装置１０では、窓部１５を通して積算カウンタ９９を視認することができるようになっていたが、積算カウンタ９９ではなく、流量計９０の識別番号を視認できるようにしてもよい。また、窓部１５を備えていなくてもよい。さらには、窓部１５を開閉する開閉扉を備えた構成としてもよい。 (1) In the electronic data conversion apparatus 10 according to the embodiment, the integration counter 99 can be visually recognized through the window portion 15. However, not the integration counter 99 but the identification number of the flow meter 90 can be visually recognized You may Also, the window portion 15 may not be provided. Furthermore, it is good also as composition provided with the opening-and-closing door which opens and closes window part 15.

（２）前記実施形態の電子データ化装置１０では、発光素子３０から第１受光素子３１，３２及び第２受光素子３３までの距離が同じであったが、その距離が異なっていてもよい。その場合、それら距離の相違に対応して第１受光素子３１，３２の第１検出信号又は、第２受光素子３３の第２検出信号に所定のゲインを乗じてから、第１受光素子３１，３２の各第１検出信号から第２受光素子３３の第２検出信号を差し引いて、温度ドリフト成分を除去すればよい。 (2) Although the distances from the light emitting element 30 to the first light receiving elements 31, 32 and the second light receiving element 33 are the same in the electronic data conversion apparatus 10 of the embodiment, the distances may be different. In that case, after multiplying the first detection signal of the first light receiving element 31, 32 or the second detection signal of the second light receiving element 33 by a predetermined gain in accordance with the difference in the distance, the first light receiving element 31, The temperature drift component may be removed by subtracting the second detection signal of the second light receiving element 33 from each of the 32 first detection signals.

（３）前記実施形態の流量計９０は、水道メータであったが、水道メータ以外の流量計（例えば、化学プラント工場や発電所等に設置された流量計）に電子データ化装置を取り付けて使用してもよい。 (3) Although the flow meter 90 of the above embodiment is a water meter, an electronic data computer is attached to a flow meter other than the water meter (for example, a flow meter installed in a chemical plant factory or a power plant) You may use it.

１０電子データ化装置
１５窓部
３０発光素子
３１，３２第１受光素子
３０Ｃ，３１Ｃ，３２Ｃ，３３Ｃ中心
３３第２受光素子
３５第１判定回路（異常検出部）
３６補正回路（補正部）
３７第２判定回路
４１計数部（逆回転検出部）
４２異常処理部（異常検出部）
９０流量計
９４表示部
９５文字盤（不動部分）
９６パイロット（回転部材）
９７，９８回転針（回転部材）
９９積算カウンタ（回転部材） DESCRIPTION OF SYMBOLS 10 Electronic data conversion device 15 Window part 30 Light emitting element 31, 32 1st light receiving element 30C, 31C, 32C, 33C Center 33 2nd light receiving element 35 1st determination circuit (abnormality detection part)
36 Correction circuit (correction unit)
37 second determination circuit 41 counting unit (reverse rotation detecting unit)
42 Error processing unit (error detection unit)
90 flow meter 94 display 95 dial face (moving part)
96 Pilot (Rotating member)
97, 98 rotary needle (rotary member)
99 Integration counter (rotary member)

Claims

A light emitting element that is addressed to the outer surface of the display unit of the flow meter and emits light toward a rotating member that rotates in the display unit; and a first light receiving element that receives reflected light of the light by the rotating member. Electronic data having a counting unit that counts the rotation of the rotating member based on a change in the first detection signal output by the first light receiving element according to the light reception intensity, and converts the measurement result of the flow meter into electronic data In the
A second light receiving element that receives the reflected light of the light from the light emitting element in the immobile portion in the display unit and outputs a second detection signal according to the received light intensity;
And a correction unit that performs a correction that subtracts a temperature drift component from a change in the first detection signal based on a change in the second detection signal.

The rotating member is a rotary needle, and a dial as the stationary portion is provided behind the rotary needle.
The first light receiving element is disposed at a position to receive the reflected light from the rotary hand or the reflected light from the dial according to the rotational position of the rotary hand.
The second light receiving element is disposed at a position where the reflected light from the dial is received substantially without receiving the reflected light from the rotating needle regardless of the rotational position of the rotary hand. The electronic data conversion device described in.

The electronic data conversion device according to claim 2, wherein the center of the first light receiving element and the center of the second light receiving element are disposed on a common circle centered on the light emitting element.

Two of the first light receiving elements are provided, and both of the first state in which only the first detection signal of one of the first light receiving elements exceeds a preset threshold due to a change in the rotational position of the rotary needle; A second state in which the first detection signal of the first light receiving element exceeds the threshold, a third state in which only the first detection signal of the other first light receiving element exceeds the threshold, and It is arranged to switch to a fourth state in which the first detection signal of the light receiving element does not exceed the threshold value,
The electronic device according to claim 2 or 3, wherein the counting unit counts one rotation of the rotary needle, with the change of the order of the first state, the second state, the third state, and the fourth state as one cycle. Data conversion device.

The change from the first state to the fourth state or the change from the fourth state to the third state, the change from the third state to the second state, or the second state from the second state The electronic data conversion device according to claim 4, further comprising a reverse rotation detection unit that detects reverse rotation of the rotary needle from a state change including at least one change to a state.

A base portion which is superimposed on the outer surface of the display portion and holds the first light receiving element and the second light receiving element;
A window portion formed on the base portion to allow visual recognition of a portion of the display portion other than the rotating member;
Based on whether the first detection signal or the second detection signal exceeds a preset reference value, an abnormality in which light is externally inserted into the display unit is detected, and counting by the counting unit is interrupted. The electronic data conversion device according to any one of claims 1 to 5, comprising: an abnormality detection unit.

The abnormality detection unit is configured to detect an abnormality based on whether the second detection signal exceeds the reference value.
7. The electronic data conversion device according to claim 6, wherein the second light receiving element is disposed closer to the window than the first light receiving element.