JP3038748B2 - Automatic synchronous switching method for demand power measurement device - Google Patents
Automatic synchronous switching method for demand power measurement deviceInfo
- Publication number
- JP3038748B2 JP3038748B2 JP1340629A JP34062989A JP3038748B2 JP 3038748 B2 JP3038748 B2 JP 3038748B2 JP 1340629 A JP1340629 A JP 1340629A JP 34062989 A JP34062989 A JP 34062989A JP 3038748 B2 JP3038748 B2 JP 3038748B2
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- JP
- Japan
- Prior art keywords
- unit
- synchronization
- signal
- time
- external
- 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
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Description
【発明の詳細な説明】 産業上の利用分野 本発明は電力会社よりパルス検出器を介して計量パル
ス及び30分需要時限パルスを受け、又は計量パルスのみ
を受けて30分需要時限内の需要電力を求め、電力管理に
必要なデータを提供する需要電力計測装置に於ける自動
同期切替方式に関するものである。The present invention relates to an electric power company which receives a measuring pulse and a 30-minute demand timed pulse from a power company via a pulse detector, or receives only a metering pulse and demands power within a 30-minute demand timed. The present invention relates to an automatic synchronous switching method in a demand power measuring device that provides data necessary for power management.
従来の技術 従来、30分需要時限は電力会社によって同期時限信号
として供給を受ける場合と供給を受けれない場合の２通
りが存在し、従って、後者の場合は、需要電力計測装置
の待つ時計（内部タイマ同期部）の30分毎の定時刻を同
期時刻としていた。2. Description of the Related Art Conventionally, there are two types of a 30-minute demand time period: a case where power is supplied as a synchronous time signal by a power company and a case where power is not supplied. The fixed time every 30 minutes of the timer synchronization unit) was used as the synchronization time.
以下、説明に於ては前者の方式を外部同期方式とし、
後者の方式を時計時刻固定同期方式とする。Hereinafter, in the description, the former method is referred to as the external synchronization method,
The latter method is a clock time fixed synchronization method.
次に上記２通りの同期方式に対する従来の切替え方法
について説明する。Next, a conventional switching method for the above-described two types of synchronization methods will be described.
従来の一つの方法は初期に設定キーにより同期方式設
定部で同期方式をどちらかに設定し、設定後は同期方式
の切替えはなされなかった。In a conventional method, the synchronization method is initially set to either of the synchronization methods by a setting key using a setting key, and after the setting, the synchronization method is not switched.
第３図は従来の実施例であり、操作部の設定キー入力
部15により同期方式をどちらかに設定することによって
同期方式設定部14に設定データが書込まれ、その指定に
よって外部同期信号入力部12あるいは、内部タイマ同期
部13のいずれかを選択し同期方式を決定する手段がとら
れていた。FIG. 3 shows a conventional embodiment, in which the setting data is written into the synchronization method setting section 14 by setting either one of the synchronization methods by the setting key input section 15 of the operation section. Means for selecting either the unit 12 or the internal timer synchronization unit 13 and determining the synchronization method has been employed.
発明が解決しようとする課題 従来の需要電力計測装置に於ては、以下の問題点があ
った。Problems to be Solved by the Invention The conventional power demand measuring device has the following problems.
従来の方法では設定操作部が必要であり、且つ設定
するわずらわしさがあった。In the conventional method, a setting operation unit is required, and there is troublesome setting.
外部同期方式に設定した場合、外部同期信号の信号
回路の故障があった場合、いつまでも需要電力の締切り
ができなくなる。In the case of setting the external synchronization method, if there is a failure in the signal circuit of the external synchronization signal, the demand power cannot be cut off forever.
そこで、本発明は設定項目をできるだけ減らし、操作
性に簡易性を持たせ、且つ上記原因で起るような誤計測
を未然に防ぐようにして信頼性を高めた同期方式を自動
的に切替えるようにしようとするものである。In view of the above, the present invention is to automatically switch the synchronization method with improved reliability by reducing the setting items as much as possible, giving simplicity in operability, and preventing erroneous measurement caused by the above-mentioned cause. Is to try.
課題を解決するための手段 本発明は外部同期信号入力部、内蔵タイマ部、外部同
期入力判定部、同期信号切替部及び、時計時刻固定同期
部より構成すると共に内蔵タイマ部にて出力される特定
時間信号T1からT1（特定時間T0）内の外部同期入力信号
の有無を同判定部により常時確認し、その結果同期信号
切替部で自動的に同期方式を切替えるものである。Means for Solving the Problems The present invention comprises an external synchronization signal input unit, a built-in timer unit, an external synchronization input determination unit, a synchronization signal switching unit, and a clock / time fixed synchronization unit, and a specification output from the built-in timer unit. The presence / absence of an external synchronization input signal within the time signals T 1 to T 1 (specific time T 0 ) is constantly checked by the determination unit, and as a result, the synchronization method is automatically switched by the synchronization signal switching unit.
作用 本発明に於ては、同期信号切替部の初期状態は時計時
刻固定同期方式に設定されており、外部同期入力判定部
では特定時間内の外部同期信号の有無を判断し、外部同
期信号が検出された場合は同判定部より検出信号を同期
信号切替部に出力し同切替部は、時計時刻固定同期部か
ら同期方式を自動的に外部同期方式に切替える。また、
時計時刻同期部は、外部同期入力判定部が外部同期信号
を特定時間内に検出しない場合に設定された計測が継続
される。Operation In the present invention, the initial state of the synchronization signal switching unit is set to the clock time fixed synchronization method, and the external synchronization input determination unit determines the presence or absence of the external synchronization signal within a specific time, and If detected, the determination unit outputs a detection signal to the synchronization signal switching unit, and the switching unit automatically switches the synchronization method from the clock / time fixed synchronization unit to the external synchronization method. Also,
The clock / time synchronization unit continues the measurement set when the external synchronization input determination unit does not detect the external synchronization signal within a specific time.
実施例 以下、本発明の実施例について図面にもとづき説明す
る。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示すブロック図であっ
て、23は特定時間を与える特定時間信号T1を出力する内
蔵タイマ部であり、24は上記特定時間信号T1と外部同期
信号D0の２入力を持ち、特定時間内の外部同期信号D0の
有無を判断する外部同期入力判定部であり、外部同期信
号D0が特定時間内に検出された場合は切替信号を「Ｈ」
とする。25は同期方式切替部であり、例えば上記の様に
切替信号が「Ｈ」の場合は外部同期方式側に切替わる。
同期方式切替部25は、初期状態は時計時刻同期方式を設
定しており切替信号の状態により同期方式を切替える。
又、特定時間内に外部同期信号D0が検出されない場合
に、切替信号が「Ｌ」となり特定時間信号T1の時点で同
期方式切替部25は時計時刻固定同期方式に切替えられ
る。尚、前記の動作は特定時間信号T1毎に繰り返し行な
われるため、常に外部同期信号の状態により同期方式の
切替えは行なわれる。Figure 1 is a block diagram showing an embodiment of the present invention, 23 is a built-in timer unit for outputting a specific time signal T 1 to give a specific time, 24 is the specific time signal T 1 and the external synchronization signal has two inputs D 0, an external synchronization input determination unit for determining the presence or absence of the external synchronizing signal D 0 in a certain time, "H a switching signal when the external sync signal D 0 is detected within a specified time "
And Reference numeral 25 denotes a synchronization system switching unit, which switches to the external synchronization system side when the switching signal is "H" as described above, for example.
The synchronization mode switching unit 25 sets the clock / time synchronization mode in the initial state, and switches the synchronization mode according to the state of the switching signal.
Further, when the external synchronization signal D 0 within a specified time is not detected, the synchronization mode switching unit 25 switching signal is at the "L" specific time signal T 1 is switched to the clock time fixed synchronization scheme. Since the operations to be repeated every specific time signal T 1, always switching the synchronization method according to the state of the external synchronizing signal is performed.
21はパルス入力部、22は外部同期信号入力部、26は内
部タイマ部であり、計量パルスと上記同期信号により需
要時限内の種々演算処理を行なうものである。Reference numeral 21 denotes a pulse input unit, 22 denotes an external synchronizing signal input unit, and 26 denotes an internal timer unit, which performs various arithmetic processing within a demand time period by using a measuring pulse and the synchronizing signal.
次に、動作について第２図のタイミングチャートによ
り説明する。Next, the operation will be described with reference to the timing chart of FIG.
32〜35は特定時間T0、36,37は外部同期信号パルス及
び38は切替信号の「Ｈ」時間を示すもので横軸方向は時
間を示す。Reference numerals 32 to 35 denote specific times T 0 , reference numerals 36 and 37 denote external synchronization signal pulses, and reference numeral 38 denotes an “H” time of the switching signal, and the horizontal axis represents time.
まず、第２図に示すように特定時間T032と外部同期信
号パルス36が共に「Ｈ」の時、切替信号が「Ｈ」とな
る。次の特定時間T033では、外部同期信号D037が検出さ
れるため切替信号の「Ｈ」時間は更新される。そして、
特定時間T034では、外部同期信号D0が検出されないため
切替信号は、特定時間信号T1の時点で「Ｌ」となり時計
時刻固定同期方式に切替えられる。前述したように、上
記動作は特定時間信号T1毎に繰り返されるため、次の外
部同期信号D0が検出された場合は、外部同期方式に切替
る。First, as shown in FIG. 2, when the specific time T 0 32 and the external synchronization signal pulse 36 are both “H”, the switching signal becomes “H”. In the following specific time T 0 33, "H" time of the switching signal for external synchronization signal D 0 37 is detected is updated. And
At the specific time T 0 34, since the external synchronization signal D 0 is not detected, the switching signal becomes “L” at the time of the specific time signal T 1 and is switched to the clock time fixed synchronization method. As described above, since the operation is repeated in every specific time signal T 1, when the next external synchronous signal D 0 is detected, it switched to the external synchronization method.
以上のように、外部同期入力判定部24の状態により、
自動的に同期信号切替部25に於て同期方式を切替る。As described above, depending on the state of the external synchronization input determination unit 24,
The synchronization method is automatically switched in the synchronization signal switching section 25.
発明の効果 以上のように本発明によれば以下の効果が得られる。Effects of the Invention As described above, according to the present invention, the following effects can be obtained.
（１）外部同期方式設定に於いて、外部同期信号回路の
故障等、何らかの原因で外部同期信号が受けられなくな
った場合でも、自動的に時計時刻固定同期方式に切替え
るため、その後の計測も信頼性のあるものとなる。(1) Even if the external synchronization signal cannot be received for some reason, such as a failure of the external synchronization signal circuit, in the external synchronization method setting, the clock is automatically switched to the fixed clock time synchronization method, so that the subsequent measurement is also reliable. It will have something.
（２）同期方式の設定部が不用になり、且つ設定操作の
わずらわしさがなくなる。また、設定忘れ等の誤設定に
よる誤計測を未然に防ぐことができる。(2) The setting unit of the synchronization method is unnecessary, and the trouble of the setting operation is eliminated. Further, erroneous measurement due to erroneous setting such as forgetting to set can be prevented.
第１図は本発明の一実施例を示す需要電力計測装置の自
動同期切替方式を示すブロック図、第２図は同タイミン
グチャート、第３図は従来例のブロック図である。 11,21……パルス入力部、12,22……外部同期信号入力
部、13,26……内部タイマー同期部、16,27……計測・演
算部、14……同期方式設定部、15……設定キー入力部、
23……内蔵タイマ部、24……外部同期入力判定部、25…
…同期方式切替部、32〜35……特定時間、36,37……外
部同期パルス、38……外部同期方式設定期間。FIG. 1 is a block diagram showing an automatic synchronous switching system of a demand power measuring apparatus according to an embodiment of the present invention, FIG. 2 is a timing chart of the same, and FIG. 3 is a block diagram of a conventional example. 11,21 pulse input section, 12,22 external synchronization signal input section, 13,26 internal timer synchronization section, 16,27 measurement / calculation section, 14 synchronization method setting section, 15 … Setting key input section,
23 ... Built-in timer section, 24 ... External synchronization input judgment section, 25 ...
... Synchronization method switching section, 32-35 ... Specific time, 36,37 ... External synchronization pulse, 38 ... External synchronization method setting period.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 柳葉 誠 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平１−304383（ＪＰ，Ａ) 特開 昭59−23261（ＪＰ，Ａ) 特公 昭59−39706（ＪＰ，Ｂ２) 特公 昭64−6410（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 3/00 G01R 11/00 - 11/66 G04G 3/00 - 7/00 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Yanagi 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-1-304383 (JP, A) JP-A-59- 23261 (JP, A) JP-B-59-39706 (JP, B2) JP-B-64-6410 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) H02J 3/00 G01R 11 / 00-11/66 G04G 3/00-7/00
Claims (1)
算部に与え、需要時限内の需要電力を求める需要電力計
測装置に於いて、需要時限として外部同期信号入力部
と、 内部タイマ同期部の両方を備え、前記外部同期信号入力
部と前記内臓タイマ部を入力源として、その両方の信号
を読み取り、特定時間内の外部同期信号の有無を判定す
る外部同期入力判定部と、前記外部同期入力判定部の結
果によって前記内部タイマ同期部と前記外部同期信号入
力部を切替える同期信号切替部とを備え、 前記特定時間内の外部同期信号の有無によって同期方式
を自動的に、外部同期方式と時計時刻固定同期方式に切
替えることを特徴とする需要電力計測装置の自動同期切
替方式。A demand power measuring device for providing a pulse input signal and a demand time signal to a measurement / calculation unit to obtain demand power within the demand time period, wherein an external synchronization signal input unit and an internal timer synchronization unit are provided as demand time periods. The external synchronization signal input unit and the built-in timer unit as input sources, read both signals, and determine whether or not there is an external synchronization signal within a specific time. The internal timer synchronization unit and a synchronization signal switching unit that switches the external synchronization signal input unit according to the result of the input determination unit, the synchronization method automatically depending on the presence or absence of the external synchronization signal within the specific time, the external synchronization method An automatic synchronous switching method for a power demand measuring device, characterized by switching to a clock time fixed synchronous method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1340629A JP3038748B2 (en) | 1989-12-29 | 1989-12-29 | Automatic synchronous switching method for demand power measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1340629A JP3038748B2 (en) | 1989-12-29 | 1989-12-29 | Automatic synchronous switching method for demand power measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03203519A JPH03203519A (en) | 1991-09-05 |
| JP3038748B2 true JP3038748B2 (en) | 2000-05-08 |
Family
ID=18338804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1340629A Expired - Fee Related JP3038748B2 (en) | 1989-12-29 | 1989-12-29 | Automatic synchronous switching method for demand power measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3038748B2 (en) |
-
1989
- 1989-12-29 JP JP1340629A patent/JP3038748B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03203519A (en) | 1991-09-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |