JPS6026968B2 - electronic weighing machine - Google Patents
electronic weighing machineInfo
- Publication number
- JPS6026968B2 JPS6026968B2 JP6499377A JP6499377A JPS6026968B2 JP S6026968 B2 JPS6026968 B2 JP S6026968B2 JP 6499377 A JP6499377 A JP 6499377A JP 6499377 A JP6499377 A JP 6499377A JP S6026968 B2 JPS6026968 B2 JP S6026968B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- weighing
- section
- pulse train
- signal
- 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
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Description
【発明の詳細な説明】
本発明に被計重物の荷重値を検出する計重部と計量部出
力信号を計重値として表示する表示部とが距離的に隔つ
ている電子式計重機に関する。Detailed Description of the Invention The present invention relates to an electronic weighing machine in which a weighing section for detecting the load value of a heavy object to be weighed and a display section for displaying a weighing section output signal as a weighing value are separated by a distance. .
例えばクレーンスケールのように前記計重部と前記表示
部が離れている場合には、計重部を表示部とを接続する
ケーブルの蓬は計重機の構造上および操作性の向上のた
めに、細いことが要求される。しかし、製鉄所の製造プ
ロセスにおけるクレーンスケールのように計重部と表示
部との距離が非常に離れている場合には、計重部出力信
号の伝送線路中のロスが譲計量の原因となるため、計重
部出力信号伝送用ケーブルは細くすることができ−ない
ものであった。そこで本発明は上記欠点を解消した電子
式計重機を提供するものである。For example, when the weighing section and the display section are separated as in a crane scale, the cable connecting the weighing section and the display section must be connected to improve the structure and operability of the weighing machine. Needs to be thin. However, when the distance between the weighing section and the display section is very far, such as with crane scales used in the manufacturing process of steel plants, loss of the weighing section output signal in the transmission line causes loss of weight. Therefore, it has been impossible to make the weighing section output signal transmission cable thinner. Therefore, the present invention provides an electronic weighing machine that eliminates the above-mentioned drawbacks.
以下本発明の一実施例を図面に基づいて説明する。An embodiment of the present invention will be described below based on the drawings.
図面は本発明による電子式計重機のブロック図を示し、
１は計重部で、ロードセル２、プリアンプ３および電圧
一周波数変換器４から成り、ロードセル２は負荷された
荷重Ｇをそれに対応した直流電圧値に変換する。プリア
ンプ３はロードセル２出力電圧を増幅して出力する。電
圧一周波数変換器４はプリァンプ３出力電圧を入力し、
それに比例した周波数のパルス列信号に変換する。５は
直流電源部で、電力供Ｖ給線路６、定電圧回路７を介し
て計重部１へ駆動用電力を供給する。The drawing shows a block diagram of an electronic weighing machine according to the invention,
Reference numeral 1 denotes a weighing section, which includes a load cell 2, a preamplifier 3, and a voltage-to-frequency converter 4, and the load cell 2 converts the applied load G into a corresponding DC voltage value. The preamplifier 3 amplifies the output voltage of the load cell 2 and outputs it. The voltage-to-frequency converter 4 inputs the preamplifier 3 output voltage,
It is converted into a pulse train signal with a frequency proportional to that. Reference numeral 5 denotes a DC power supply unit that supplies driving power to the weighing unit 1 via a power supply V feed line 6 and a constant voltage circuit 7.
なお、矢印Ａは電力供給方向を示し、計重部１と直流電
源部５とは距離的に融たって設けられている。８，９は
パルス・トランスで、パルス・トランス８は計重部１側
においてその二次側Ｓ８を電力供給線路６に介し、一次
側Ｐ８には電圧一周波数変換器４出力信号を出力アンプ
１０を介して増幅した信号が入力され、電圧一周波数変
換器４を電力供給線路６に重畳させて亀源５側に伝送し
ている。Note that arrow A indicates the direction of power supply, and the weighing section 1 and the DC power supply section 5 are disposed so as to be fused in terms of distance. 8 and 9 are pulse transformers, and the pulse transformer 8 has its secondary side S8 connected to the power supply line 6 on the weighing section 1 side, and the voltage-frequency converter 4 output signal is connected to the output amplifier 10 on the primary side P8. The amplified signal is inputted via the voltage-to-frequency converter 4, superimposed on the power supply line 6, and transmitted to the power source 5 side.
矢印Ｂは計重信号伝送方向を示す。他方のパルス・トラ
ンス９は電源部５側でその一次側Ｐ９を電力供野合線路
６に介菱し、二次側Ｓ８より計重部１側において重畳さ
れた計重信号としてのパルス列信号を検出している。１
１は波形整形回路で、パルス・トランス８、電力供Ｖ給
線路６、パルス・トランス９を介して伝送したことによ
って発生するパルス列信号の波形の鈍りを整形して出力
する。Arrow B indicates the weight signal transmission direction. The other pulse transformer 9 connects its primary side P9 to the power supply combining line 6 on the power supply section 5 side, and detects a pulse train signal as a weighing signal superimposed on the weighing section 1 side from the secondary side S8. are doing. 1
Reference numeral 1 denotes a waveform shaping circuit that shapes and outputs the waveform bluntness of the pulse train signal generated by transmission via the pulse transformer 8, the power supply V feed line 6, and the pulse transformer 9.
１２は表示部で、カウンタ１３、レジス夕１４、表示部
１５、タイムベース回路１６などから成り、波形整形回
路１１と共に電源部５側に設けられ、波形整形回路１１
出力のパルス列信号をそれに対応した計重値として表示
する。Reference numeral 12 denotes a display section, which includes a counter 13, a register 14, a display section 15, a time base circuit 16, etc., and is provided on the power supply section 5 side together with the waveform shaping circuit 11.
The output pulse train signal is displayed as the corresponding weight value.
カウンタ１３はタイムベース回路１６の出力する計数時
間信号ｔＧによって制御されているアンドゲート１７を
介して波形整形回路１１出力のパルス列信号を一定時間
繰返して計数し、かつ計数値に対応した信号を出力する
。レジスタ１４はカウンタ１３出力信号とタイムベース
回路１６出力のシフト信号ｔｃｐとを入力し、シフト信
号ｔｃｐによって記憶を命令された時刻のカウンタ１３
の内容を次のシフト信号ｔｃｐが発生するまで保持して
出力する。１５は表示器で、レジスタ１４出力信号をそ
れに対応した計量値としてデジタル表示するものである
。The counter 13 repeatedly counts the pulse train signal output from the waveform shaping circuit 11 for a certain period of time via an AND gate 17 controlled by the counting time signal tG output from the time base circuit 16, and outputs a signal corresponding to the counted value. do. The register 14 inputs the output signal of the counter 13 and the shift signal tcp of the output of the time base circuit 16, and stores the time that the counter 13 is instructed to store by the shift signal tcp.
The contents of are held and output until the next shift signal tcp is generated. A display 15 digitally displays the output signal of the register 14 as a corresponding measurement value.
なお、カウンタ１３は計数開始に際して、その内容はタ
イムベース回路１６出力のリセット信号ｔＲによってク
リアされる。また、計重部１側の定電圧回路１７の入力
の介菱されたフィルター回路１８は電力供Ｖ給線路６に
車畳したパルス列信号が定電圧回路７を介して計重部１
に婦線されないように設けたものである。パルス列信号
に変換した計重信号を、計重部側へ電力を供給する電力
供野合線路に重畳し、電源都側において重畳されたパル
ス列信号を検出して計重値として表示するため、ケーブ
ルの数が少なくて済み、経済的である上、ケーブル径を
細くできるため計重機の操作性が向上する。更に、計重
信号はパルス列信号として伝送するため計重部と表示部
との同期を取る必要もなく、線間ロスも発生しないため
、計重部と表示部が距離的に隔つてし、ても誤計量は発
生せず、計重の信頼性が向上するものである。なお上記
実施例において計重信号を電力供ｇ費線路６に童畳し、
また検出するために、パルス・トランス８，９によって
出力アンプ１０と電力供尊台線路６、電力供給線路６と
波形整形回路１１とをカップリングしたが、コンデンサ
によてカップリングさせても同様の効果が得られる。以
上説明のように本発明によると、荷重値に対応した周波
数のパルス列信号を出力する計重部と、電源部から計重
部へ計重部駆動用電力を僕９会する電力供８台線路と、
計重部側において計重部出力信号を前記電力供繋合線路
に重畳する手段と、電源部側において電力供孫合線路に
童畳したパルス列信号を取り出す検出手段と、該検出手
段出力のパルス列信号を一定時間計数し、計数値に対応
した計重値として表示する表示部とを設けたため、計重
信号の伝送ロスがなくなり、計重の信頼性が向上する上
、計重部への電力伝送線と計重部から表示部への信号伝
送線に同じ伝送線を使用しているため、線数が少なくて
済み、経済的である。Note that when the counter 13 starts counting, its contents are cleared by the reset signal tR output from the time base circuit 16. In addition, a filter circuit 18 connected to the input of the constant voltage circuit 17 on the side of the weighing section 1 transmits a pulse train signal applied to the power supply V feed line 6 to the weighing section 1 through the constant voltage circuit 7.
This was designed to prevent women from being exposed. The weighing signal converted into a pulse train signal is superimposed on the power supply coupling line that supplies power to the weighing section, and the superimposed pulse train signal is detected on the power supply side and displayed as a weighing value. In addition to being economical as the number of cables required is small, the cable diameter can be made smaller, which improves the operability of the weighing machine. Furthermore, since the weighing signal is transmitted as a pulse train signal, there is no need to synchronize the weighing section and the display section, and there is no loss between lines. However, no erroneous weighing occurs, and the reliability of weighing is improved. In addition, in the above embodiment, the weighing signal is transmitted to the power supply line 6,
Further, for detection, the output amplifier 10 and the power supply line 6 and the power supply line 6 and the waveform shaping circuit 11 were coupled by the pulse transformers 8 and 9, but the same effect can be achieved by coupling with a capacitor. The effect of this can be obtained. As explained above, according to the present invention, there is provided a weighing section that outputs a pulse train signal of a frequency corresponding to a load value, and a power supply line for eight units that supplies power for driving the weighing section from the power supply section to the weighing section. and,
means for superimposing a weighing section output signal on the power supply coupling line on the weighing section side; a detecting means for extracting the pulse train signal superimposed on the power supply coupling line on the power supply section side; and a pulse train output from the detecting means. A display unit that counts signals for a certain period of time and displays a weight value corresponding to the counted value eliminates transmission loss of weight signals, improves weighing reliability, and reduces power consumption to the weighing unit. Since the same transmission line is used for the transmission line and the signal transmission line from the weighing section to the display section, the number of lines is small, making it economical.
更に、ケーブル径が細くなるため、操作性も向上するも
のである。Furthermore, since the cable diameter is reduced, operability is also improved.
図面は本発明の一実施例である電子式計重機のフロツク
図を示す。
１・・・・・・計重部、２・・・…ロードセル、４・・
・・・・電圧一周波数変換器、５・・・・・・直流電源
部、６・・・・・・電力供ｖ給線路、８，９・・・・・
・パルス・トランス、１２・・・…表示部。The drawing shows a block diagram of an electronic weighing machine which is an embodiment of the present invention. 1...Weighing section, 2...Load cell, 4...
...Voltage-frequency converter, 5...DC power supply section, 6...Power supply V feed line, 8, 9...
- Pulse transformer, 12...display section.
Claims (1)
計重部と、電源部から計重部へ計重部駆動用電力を供給
する電力供給線路と、計重部側において計重部出力信号
を前記電力供給線路に重畳する手段と、電源部側におい
て電力供給線路に重畳したパルス列信号を取出す検出手
段と、該検出手段出力のパルス列信号を一定時間計数し
、該計数値に対応した計重値として表示する表示部とを
設けたことを特徴とする電子式計重機。1. A weighing section that outputs a pulse train signal with a frequency corresponding to the load value, a power supply line that supplies power for driving the weighing section from the power supply section to the weighing section, and a power supply line that supplies the weighing section output signal on the weighing section side. means for superimposing the pulse train signal on the power supply line; a detecting means for extracting the pulse train signal superimposed on the power supply line on the power supply side; and a weighted value corresponding to the counted value by counting the pulse train signal output from the detecting means for a certain period of time. What is claimed is: 1. An electronic weighing machine characterized by being provided with a display section that displays .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6499377A JPS6026968B2 (en) | 1977-06-01 | 1977-06-01 | electronic weighing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6499377A JPS6026968B2 (en) | 1977-06-01 | 1977-06-01 | electronic weighing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53149362A JPS53149362A (en) | 1978-12-26 |
| JPS6026968B2 true JPS6026968B2 (en) | 1985-06-26 |
Family
ID=13274086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6499377A Expired JPS6026968B2 (en) | 1977-06-01 | 1977-06-01 | electronic weighing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6026968B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63155886U (en) * | 1987-03-31 | 1988-10-13 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735729A (en) * | 1980-08-14 | 1982-02-26 | Matsushita Electric Ind Co Ltd | Weighing device |
-
1977
- 1977-06-01 JP JP6499377A patent/JPS6026968B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63155886U (en) * | 1987-03-31 | 1988-10-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53149362A (en) | 1978-12-26 |
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