JPH04295726A - Electronic balance - Google Patents
Electronic balanceInfo
- Publication number
- JPH04295726A JPH04295726A JP6037591A JP6037591A JPH04295726A JP H04295726 A JPH04295726 A JP H04295726A JP 6037591 A JP6037591 A JP 6037591A JP 6037591 A JP6037591 A JP 6037591A JP H04295726 A JPH04295726 A JP H04295726A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- sensitivity
- load detection
- pan
- built
- 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.)
- Granted
Links
- 230000035945 sensitivity Effects 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims description 33
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】 本発明は内蔵分銅とその加除
機構を有し、較正指令の発生により自動的に感度較正を
行う機能を備えた電子天びんに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic balance having a built-in weight and a mechanism for adding and removing the weight, and having a function of automatically performing sensitivity calibration upon generation of a calibration command.
【０００２】0002
【従来の技術】 電子天びんでは、一般に、感度較正
を質量既知の分銅等を荷重検出機構に負荷し、その状態
での荷重検出機構の出力と、分銅質量とを用いて感度を
較正する機能を有している。このような感度較正機能を
持つ電子天びんのうち、感度較正用の分銅を天びんケー
ス内に内蔵するとともに、その内蔵分銅を荷重検出機構
に負荷／除去する分銅加除機構を備え、スイッチ操作に
より適宜に、あるいは周囲温度が所定温度変化以上変化
したとき、または前回の感度較正時点から所定時間が経
過した時点で、自動的に分銅加除機構を駆動して内蔵分
銅を荷重検出機構に負荷し、感度較正を行うように構成
されたものがある。[Prior Art] Generally, electronic balances have a function to calibrate sensitivity by loading a weight, etc. of known mass onto a load detection mechanism, and using the output of the load detection mechanism in that state and the mass of the weight. have. Among electronic balances with such a sensitivity calibration function, a weight for sensitivity calibration is built into the balance case, and a weight addition/removal mechanism is installed to load/remove the built-in weight from/to a load detection mechanism. , or when the ambient temperature changes by more than a predetermined temperature change, or when a predetermined time has elapsed since the previous sensitivity calibration, the weight addition/removal mechanism is automatically driven to load the built-in weight to the load detection mechanism, and the sensitivity calibration is performed. There are some that are configured to do this.
【０００３】0003
【発明が解決しようとする課題】 ところで、汎用天
びん等と称される電子天びんにおいては、上述のような
較正分銅内蔵型の電子天びんであっても、いわゆる分析
天びん等のように試料皿を囲むひょう量室を持つものは
殆どなく、従って、内蔵分銅を負荷して感度較正を行う
ときでも、試料皿を介して風の影響を受け、正確な感度
較正を行えない可能性がある。[Problems to be Solved by the Invention] Incidentally, in electronic balances called general-purpose balances, even if they have a built-in calibration weight as described above, they do not have to surround the sample dish like so-called analytical balances. There are almost no weighing chambers, and therefore, even when performing sensitivity calibration by loading a built-in weight, there is a possibility that accurate sensitivity calibration cannot be performed due to the influence of wind passing through the sample pan.
【０００４】また、内蔵分銅を有する電子天びんでは、
ひょう量室の有無に拘らず、内蔵分銅を荷重検出部に負
荷するときに試料皿に試料等が載っている場合には誤っ
た感度較正を行ってしまう。そのため、試料皿上に荷重
が作用している状態では感度較正動作を禁止するような
機能を持つものがあるが、このようなものでも、例えば
所定時間の経過により自動的に感度較正動作を行う場合
等において、いちいち試料皿から試料等を除去してやる
必要があるとともに、近くに作業者が居ない場合には、
本来行われるべき感度較正が行われなくなってしまうと
いう問題があった。[0004] Furthermore, in electronic balances with built-in weights,
Regardless of the presence or absence of a weighing chamber, if a sample or the like is placed on the sample pan when the built-in weight is loaded onto the load detection section, incorrect sensitivity calibration will be performed. For this reason, some devices have a function that prohibits the sensitivity calibration operation when a load is applied to the sample dish, but even such devices have a function that automatically performs the sensitivity calibration operation after a predetermined period of time has elapsed. In some cases, it is necessary to remove samples from the sample pan one by one, and if there are no workers nearby,
There was a problem in that the sensitivity calibration that was originally supposed to be performed was not performed.
【０００５】本発明はこのような事情に鑑みてなされた
もので、感度較正時において風による影響を殆ど受ける
ことがなく、また、感度較正時に試料皿に荷重が作用し
ていても、正確な感度較正を行うことのできる電子天び
んの提供を目的としている。The present invention was made in view of the above circumstances, and it is hardly affected by the wind during sensitivity calibration, and even if a load is applied to the sample pan during sensitivity calibration, accurate measurement can be performed. The purpose is to provide an electronic balance that can perform sensitivity calibration.
【０００６】[0006]
【課題を解決するための手段】 上記の目的を達成す
るため、本発明の電子天びんは、荷重検出機構から試料
皿を分離／載置する皿加除機構を有し、較正指令の発生
により内蔵分銅を荷重検出機構に負荷する前に、試料皿
を荷重検出機構から自動的に分離し、かつ、感度較正動
作の終了後に試料皿を荷重検出機構に自動的に載置する
よう構成したことによって特徴付けられる。[Means for Solving the Problems] In order to achieve the above object, the electronic balance of the present invention has a plate addition/removal mechanism that separates/places the sample plate from the load detection mechanism, and the built-in weight This feature is characterized by the structure in which the sample pan is automatically separated from the load detection mechanism before the load is applied to the load detection mechanism, and the sample pan is automatically placed on the load detection mechanism after the sensitivity calibration operation is completed. Can be attached.
【０００７】[0007]
【作用】 内蔵分銅を荷重検出機構に負荷する前に、
試料皿を荷重検出機構から自動的に分離してしまうこと
により、荷重検出機構には試料皿を介した風の影響を受
けることがなく、かつ、試料皿に荷重が作用していても
荷重検出機構の出力に影響をおよぼすことがない。[Operation] Before loading the built-in weight to the load detection mechanism,
By automatically separating the sample pan from the load detection mechanism, the load detection mechanism is not affected by the wind passing through the sample pan, and even if a load is acting on the sample pan, load detection is possible. It does not affect the output of the mechanism.
【０００８】[0008]
【実施例】 図１は本発明実施例の天びんケース１の
一部を切り欠いて示す正面図で、（Ａ）は通常の測定状
態を、（Ｂ）は内蔵分銅４を荷重検出機構３に負荷した
状態を示している。天びんケース１の上面には荷重検出
機構３に連通する皿受け３１を外部に臨ませる孔１１が
形成されており、通常の測定状態では、この孔１１から
外部に突出した皿受け３１の頂部に試料皿２が載せられ
る。[Example] Fig. 1 is a partially cutaway front view of a balance case 1 according to an embodiment of the present invention. Indicates a loaded state. A hole 11 is formed on the top surface of the balance case 1 to allow a pan holder 31 that communicates with the load detection mechanism 3 to be exposed to the outside. A sample plate 2 is placed thereon.
【０００９】天びんケース１の内部には、内蔵分銅４と
、その内蔵分銅４を荷重検出機構３に対して加除するた
めのレバー５１、カムおよびモータ（いずれも図示せず
）等からなる公知の分銅加除機構５が配設されており、
感度較正指令が発生すると、内蔵分銅４が荷重検出機構
３に負荷され、その状態で荷重検出機構３の出力が読み
取られた後、再び内蔵分銅４が荷重検出機構３から除去
されるように構成されている。Inside the balance case 1, there is a built-in weight 4, a lever 51 for applying and removing the built-in weight 4 to and from the load detection mechanism 3, a cam, a motor (none of which are shown), etc., which are known in the art. A weight adjustment mechanism 5 is provided,
When a sensitivity calibration command is issued, the built-in weight 4 is loaded onto the load detection mechanism 3, and after the output of the load detection mechanism 3 is read in this state, the built-in weight 4 is removed from the load detection mechanism 3 again. has been done.
【００１０】天びんケース１の内部にはまた、試料皿２
を皿受け３１に対して加除する皿加除機構６が配設され
ている。この皿加除機構６は、円形の一部を切り欠いた
略馬蹄形の皿支持部６１と、その皿支持部６１の下部に
固着された鉛直のラック６２と、そのラック６２を上下
方向にガイドするガイド６３、ラック６２に噛み合うピ
ニオンギア６４、およびこのピニオンギア６４を回転さ
せるモータ６５等によって構成されており、モータ６５
の駆動によりラック・ピニオン機構を介して皿支持部６
１が上下動するように構成されている。[0010] Inside the balance case 1, there is also a sample pan 2.
A plate adjustment/removal mechanism 6 is provided for adding and removing the plate to and from the plate support 31. The dish adding/removing mechanism 6 includes a substantially horseshoe-shaped dish support part 61 with a part of the circle cut out, a vertical rack 62 fixed to the lower part of the dish support part 61, and a vertical rack 62 that guides the dish support part 61 in the vertical direction. It is composed of a guide 63, a pinion gear 64 that meshes with the rack 62, and a motor 65 that rotates the pinion gear 64.
The tray support part 6 is driven by the rack and pinion mechanism.
1 is configured to move up and down.
【００１１】そして、図２に天びんケース１の上面の要
部を斜視図で示すように、天びんケース１の上面には、
皿受け３１を突出させる孔１１を中心として、皿支持部
６１を出し入れするための略馬蹄形の孔１２が形成され
ており、皿支持部６１が上限にまで上昇した状態では、
図１（Ｂ）に示すように皿支持部６１により試料皿２を
突き上げ、試料皿２を皿受け３１から分離できるように
なっている。As shown in FIG. 2, which is a perspective view of the main part of the top surface of the balance case 1, the top surface of the balance case 1 includes:
A substantially horseshoe-shaped hole 12 for inserting and removing the plate support 61 is formed around the hole 11 through which the plate support 31 protrudes, and when the plate support 61 is raised to the upper limit,
As shown in FIG. 1(B), the sample plate 2 can be pushed up by the plate supporting portion 61 to separate the sample plate 2 from the plate holder 31.
【００１２】図３は本発明実施例の制御部を構成するマ
イクロコンピュータのＲＯＭに書き込まれたプログラム
のうち、感度較正ルーチンの内容を示すフローチャート
で、以下、この図を参照しつつ本発明実施例の動作を述
べる。このルーチンは、前回の較正時から所定時間が経
過したとき、および前回較正時から所定量以上の温度変
化があった場合に自動的に、あるいはキー操作等により
発生する感度較正指令があったときに選択される。FIG. 3 is a flowchart showing the contents of the sensitivity calibration routine among the programs written in the ROM of the microcomputer constituting the control section of the embodiment of the present invention. Describe the operation. This routine is executed automatically when a predetermined amount of time has passed since the last calibration, when the temperature has changed by more than a predetermined amount since the last calibration, or when a sensitivity calibration command is issued by key operation, etc. selected.
【００１３】感度較正指令が発生すると（ＳＴ１）、ま
ず、皿加除機構６に動作指令を与えてモータ６５を駆動
し、皿支持部６１を上限にまで上昇させ、図１（Ｂ）に
示すように試料皿２を皿受け３１から分離させる（ＳＴ
２）。その後、分銅加除機構５に動作指令を与え、内蔵
分銅４を荷重検出機構３に負荷する（ＳＴ３）。その状
態で荷重検出部３の出力Ｄ１ を読み取る（ＳＴ４）。When a sensitivity calibration command is generated (ST1), first, an operation command is given to the dish adding/removing mechanism 6 to drive the motor 65 to raise the dish support part 61 to the upper limit, as shown in FIG. 1(B). Separate the sample plate 2 from the plate holder 31 (ST
2). Thereafter, an operation command is given to the weight addition/removal mechanism 5, and the built-in weight 4 is applied to the load detection mechanism 3 (ST3). In this state, the output D1 of the load detection section 3 is read (ST4).
【００１４】次いで再び分銅加除機構５に動作指令を与
え、内蔵分銅４を荷重検出機構３から除去し（ＳＴ５）
、その状態での荷重検出機構３の出力Ｄ２ を読み取る
（ＳＴ６）。次に、読み取った各データＤ１ とＤ２
、および既知の内蔵分銅４の質量Ｍとから、次の演算に
よって感度係数Ｋを算出し、前回の較正動作で求められ
ている係数を更新する（ＳＴ７）。Next, an operation command is given to the weight addition/removal mechanism 5 again, and the built-in weight 4 is removed from the load detection mechanism 3 (ST5).
, the output D2 of the load detection mechanism 3 in that state is read (ST6). Next, each read data D1 and D2
, and the known mass M of the built-in weight 4, the sensitivity coefficient K is calculated by the following calculation, and the coefficient determined in the previous calibration operation is updated (ST7).
【００１５】Ｋ＝Ｍ／（Ｄ１ −Ｄ２ ）最後に、皿加
除機構６に指令を与えてモータ６５を駆動し、皿支持部
６１を下限にまで降下させて（ＳＴ８）、感度較正動作
を終える。以上のように本発明実施例では、常に試料皿
２が荷重検出機構３から分離された状態で感度較正が行
われ、試料皿２上に試料等が載っていても、あるいは試
料皿２に風が作用しても感度較正結果に影響を与えない
。K=M/(D1 - D2) Finally, a command is given to the dish adding/removing mechanism 6 to drive the motor 65 to lower the dish support part 61 to the lower limit (ST8), thereby completing the sensitivity calibration operation. . As described above, in the embodiment of the present invention, sensitivity calibration is always performed with the sample pan 2 separated from the load detection mechanism 3, and even if there is a sample etc. on the sample pan 2 or there is no wind on the sample pan 2. does not affect the sensitivity calibration results.
【００１６】なお、皿加除機構６は以上の本発明実施例
の構造に限られることなく、任意の公知の機構を採用す
ることができることは勿論である。It is to be noted that the dish adding/removing mechanism 6 is not limited to the structure of the above-described embodiment of the present invention, and any known mechanism can of course be adopted.
【００１７】[0017]
【発明の効果】 以上説明したように、本発明によれ
ば、感度較正指令の発生によって自動的に試料皿が荷重
検出機構から分離され、その状態で内蔵分銅を荷重検出
機構に負荷／除去して感度係数の更新動作が行われるの
で、試料皿を通じて荷重検出機構におよぼす風等の外乱
の影響の全てを排除することが可能となり、常に正確な
感度較正を行うことができるとともに、試料皿上に試料
等が載っている状態でも、これを降ろすことなく自動的
に感度較正が可能となる。[Effects of the Invention] As explained above, according to the present invention, the sample pan is automatically separated from the load detection mechanism upon generation of a sensitivity calibration command, and in this state, the built-in weight is loaded/removed from the load detection mechanism. Since the sensitivity coefficient is updated at Even if a sample is placed on the sensor, sensitivity calibration can be performed automatically without having to take it down.
【００１８】以上の結果、従来の較正分銅内蔵型の電子
天びんに比して、その利点がより生かされ、作業者は感
度較正時にいちいち試料を降ろす等の煩わしさから開放
され、特に時間経過等によって自動的に感度較正を行う
自動感度較正機能を有した電子天びんにおいては、従来
のように試料皿上に物が載っている状態での警告表示等
を行う必要がなくなり、これによって天びんの較正動作
が止まってしまう等の不具合が解消される。As a result of the above, compared to the conventional electronic balance with a built-in calibration weight, its advantages are more fully utilized, and the operator is freed from the trouble of unloading the sample each time when calibrating the sensitivity. With electronic balances that have an automatic sensitivity calibration function that automatically calibrates the sensitivity, it is no longer necessary to display a warning when something is placed on the sample pan, as was the case in the past. Problems such as operation stopping will be resolved.
【図１】 本発明実施例の天びんケース１の一部を切
り欠いて示す正面図で、（Ａ）は通常の測定状態、（Ｂ
）は内蔵分銅４を荷重検出機構３に負荷した状態で示す
図FIG. 1 is a partially cutaway front view of a balance case 1 according to an embodiment of the present invention, in which (A) is a normal measurement state;
) is a diagram showing the built-in weight 4 loaded on the load detection mechanism 3.
【図２】 その天びんケース１上面の要部斜視図[Figure 2] A perspective view of the main parts of the top of the balance case 1
【
図３】 本発明実施例のマイクロコンピュータのＲＯ
Ｍに書き込まれたプログラムのうち、感度較正ルーチン
の内容を示すフローチャート[
Figure 3: RO of the microcomputer according to the embodiment of the present invention
A flowchart showing the contents of the sensitivity calibration routine among the programs written in M.
１・・・・天びんケース １１・・・・皿受け用孔 １２・・・・皿支持部用孔 ２・・・・試料皿 ３・・・・荷重検出機構 ３１・・・・皿受け ４・・・・内蔵分銅 ５・・・・分銅加除機構 ５１・・・・レバー ６・・・・皿加除機構 ６１・・・・皿支持部 ６２・・・・ラック ６３・・・・ガイド ６４・・・・ピニオンギア ６５・・・・モータ 1... Balance case 11...Dish holder hole 12...Dish support hole 2...Sample plate 3...Load detection mechanism 31...Dish holder 4...Built-in weight 5... Weight addition/removal mechanism 51...Lever 6...Dish removal mechanism 61...Dish support part 62...Rack 63...Guide 64...Pinion gear 65...Motor
Claims (1)
の内蔵分銅を試料皿が載置される荷重検出機構に対して
加除する分銅加除機構を有するとともに、上記内蔵分銅
を上記荷重検出機構に負荷した状態での当該荷重検出機
構の出力と、上記内蔵分銅の質量値を用いて当該天びん
の感度を較正する感度較正手段を備えた電子天びんにお
いて、上記荷重検出機構に対し上記試料皿を分離／載置
する皿加除機構を有し、上記較正指令の発生により上記
内蔵分銅を荷重検出機構に負荷する前に上記試料皿を荷
重検出機構から自動的に分離し、かつ、感度較正動作の
終了後にこの試料皿を荷重検出機構に自動的に載置する
よう構成されていることを特徴とする電子天びん。Claim 1: A built-in weight, and a weight addition/removal mechanism that adds or subtracts the built-in weight to or from a load detection mechanism on which a sample plate is placed upon generation of a calibration command; In an electronic balance, the electronic balance is equipped with a sensitivity calibration means for calibrating the sensitivity of the balance using the output of the load detection mechanism in a state where the load detection mechanism is in a state of It has a mechanism for adding and removing a sample plate, and automatically separates the sample plate from the load detection mechanism before the built-in weight is applied to the load detection mechanism upon generation of the calibration command, and after the sensitivity calibration operation is completed. An electronic balance characterized by being configured to automatically place this sample dish on a load detection mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6037591A JP2867726B2 (en) | 1991-03-25 | 1991-03-25 | Electronic balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6037591A JP2867726B2 (en) | 1991-03-25 | 1991-03-25 | Electronic balance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04295726A true JPH04295726A (en) | 1992-10-20 |
| JP2867726B2 JP2867726B2 (en) | 1999-03-10 |
Family
ID=13140329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6037591A Expired - Fee Related JP2867726B2 (en) | 1991-03-25 | 1991-03-25 | Electronic balance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2867726B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006118878A (en) * | 2004-10-19 | 2006-05-11 | Japan Atom Energy Res Inst | Vacuum mass measuring device |
| JP2009541762A (en) * | 2006-06-28 | 2009-11-26 | メトラー−トレド アクチェンゲゼルシャフト | Electronic scale calibration weight device |
| CN113008335A (en) * | 2021-02-02 | 2021-06-22 | 中国计量科学研究院 | Fluid quantitative metering device |
-
1991
- 1991-03-25 JP JP6037591A patent/JP2867726B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006118878A (en) * | 2004-10-19 | 2006-05-11 | Japan Atom Energy Res Inst | Vacuum mass measuring device |
| JP4729655B2 (en) * | 2004-10-19 | 2011-07-20 | 独立行政法人 日本原子力研究開発機構 | Vacuum mass measuring device |
| JP2009541762A (en) * | 2006-06-28 | 2009-11-26 | メトラー−トレド アクチェンゲゼルシャフト | Electronic scale calibration weight device |
| CN113008335A (en) * | 2021-02-02 | 2021-06-22 | 中国计量科学研究院 | Fluid quantitative metering device |
| CN113008335B (en) * | 2021-02-02 | 2022-08-05 | 中国计量科学研究院 | Fluid quantitative metering device |
Also Published As
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|---|---|
| JP2867726B2 (en) | 1999-03-10 |
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