JPH026722A - Measuring instrument utilizing bridge circuit which causes no temperature drift - Google Patents
Measuring instrument utilizing bridge circuit which causes no temperature driftInfo
- Publication number
- JPH026722A JPH026722A JP63157523A JP15752388A JPH026722A JP H026722 A JPH026722 A JP H026722A JP 63157523 A JP63157523 A JP 63157523A JP 15752388 A JP15752388 A JP 15752388A JP H026722 A JPH026722 A JP H026722A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- cooling
- sensor
- main body
- space
- 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.)
- Pending
Links
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000012937 correction Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
Landscapes
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ロードセルや作動トランスなどの、ブリッジ
回路を利用した計測装置を用いて物体の重量や力を測定
する際に、周囲温度の変化によって変動する出力（温度
ドリフト）の補正に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is applicable to changes in ambient temperature when measuring the weight or force of an object using a measuring device using a bridge circuit, such as a load cell or an actuating transformer. This relates to correction of output (temperature drift) that fluctuates due to
（従来技術）
従来、ブリッジ回路を利用した計測装置を用いて荷重や
トルク、圧力などの計測を行なう際に、周囲の温度変化
によって出力が変化する現象が表われる。作動トランス
の場合には直列補償法やフィードバック補償法などがあ
り、電気的に補正がされていたが、その他のセンサーで
は、そのセンサの特性表示をするのみでユーザーに提供
され、本体そのものに補正のための改良はなされていな
かった。また、作動トランスにしても、使用温度範囲に
上下限があり、しかも、たとえば乾燥室のように温度が
刻々と変化する場合などは、熱伝導と補正にずれが生ま
れ、誤差を生じていた。(Prior Art) Conventionally, when measuring load, torque, pressure, etc. using a measuring device using a bridge circuit, a phenomenon occurs in which the output changes due to changes in ambient temperature. In the case of actuating transformers, there are series compensation methods, feedback compensation methods, etc., and corrections are made electrically, but with other sensors, only the characteristics of the sensor are provided to the user, and corrections are made in the main body itself. No improvements had been made. Furthermore, even operating transformers have upper and lower limits to their operating temperature range, and in cases where the temperature changes from moment to moment, such as in a drying room, there is a discrepancy between heat conduction and correction, resulting in errors.
（本発明の目的）
本発明は、これら計測センサーの温度変化に対する基準
点や出力の変化を押え、周囲温度が変化しても、常に変
わらぬ基準点や出力を維持し、常に正確な計測を可能に
することを目的とするものである。(Objective of the present invention) The present invention suppresses changes in the reference point and output of these measurement sensors due to temperature changes, maintains the same reference point and output even if the ambient temperature changes, and always performs accurate measurements. The purpose is to make it possible.
（発明の要旨）
本発明は、計測センサー本体を二重ジャケット状に形成
し、液体または気体により、センサー本体を加熱または
冷却して周囲温度変化の影響を受けないようにして計測
制御するものである。(Summary of the Invention) The present invention controls measurement by forming a measurement sensor body into a double jacket shape and heating or cooling the sensor body with liquid or gas so that it is not affected by changes in ambient temperature. be.
（発明の構成）
以下、本発明を実施例の図面に基づき説明をすると。こ
こでは、一般的に構造の解りやすいロードセルについて
説明をする。 第１図は一般的なロドセルセンサーを示
す。４に何重が加わると２のストレンゲーシセンサーが
４の歪を感知して出力信号を出すが、センサーの周囲温
度が変化すれば、それにともなって出力も変動する。(Structure of the Invention) The present invention will be explained below based on drawings of embodiments. Here, we will explain about load cells whose structure is generally easy to understand. FIG. 1 shows a typical load cell sensor. No matter how many layers are applied to 4, the strain sensor 2 senses the strain on 4 and outputs an output signal, but if the ambient temperature of the sensor changes, the output will also fluctuate accordingly.
第２図は、前記ロードセル本体１をジャケット６でカバ
ーし、出入ロア、８を設け、入りロアより冷却または加
熱媒体を流入させ、本体１の内部空間１０の温度をコン
トロールするものである。７より入った媒体は、ジャケ
ット６の内部空間９で拡散し、冷却または加熱作用をう
けたのちに出口８へ出ていく。In FIG. 2, the load cell main body 1 is covered with a jacket 6, an inlet/outlet lower 8 is provided, and a cooling or heating medium is introduced from the inlet lower to control the temperature of the internal space 10 of the main body 1. The medium entering from 7 diffuses in the internal space 9 of the jacket 6 and exits to the outlet 8 after being cooled or heated.
第３図は第４図の平面図である。FIG. 3 is a plan view of FIG. 4.
第４図は第２図のロードセルの、内部空間１０の温度を
測定するへく温度センサー１１を取り付けたものである
。FIG. 4 shows the load cell shown in FIG. 2 to which a temperature sensor 11 for measuring the temperature of the internal space 10 is attached.
内部空間１０は、周囲温度が変化すれば、それにともな
って温度変化する。内部空間１０の温度変化の影響をう
けて、ストレンゲージの出力信号も変動する。よって、
環境温度に左右されないで内部空間ｌＯの温度をほぼ一
定に保つことが必要になってくる。The temperature of the internal space 10 changes as the ambient temperature changes. The output signal of the strain gauge also fluctuates under the influence of temperature changes in the internal space 10. Therefore,
It becomes necessary to keep the temperature of the internal space IO almost constant without being affected by the environmental temperature.
内部空間１０の温度を温度センサー１１にて計測し、内
部空間の温度変化に追随して加熱または冷却熱源流入量
をコントロールし、内部空間温度を定温度に導くように
構成したものである。The temperature of the internal space 10 is measured by a temperature sensor 11, and the amount of heating or cooling heat source inflow is controlled in accordance with changes in the temperature of the internal space, so that the internal space temperature is brought to a constant temperature.
尚、図面のジャケット、温度センサー、加熱冷却媒体の
出入口の位置、形状その他は、現状に則したものとし、
この図面にこだわるものではない。In addition, the position, shape, etc. of the jacket, temperature sensor, heating and cooling medium inlet and outlet in the drawings are based on the current situation.
I'm not particular about this drawing.
また、そのほかのブリッジ回路を用いた計測センサーに
ついても、ここでは図示しなかったが同様の理論および
構造で構成するものとする。In addition, other measurement sensors using bridge circuits are also constructed based on the same theory and structure, although they are not shown here.
（発明の効果）
（ｔ４）
本発明は上記のごとく構成されており、計測環境温度に
左右されずに、常に正確な測定が可能となったため、従
来のように測定値の補正をしたりする必要がなくなり、
そのぶん精密計測が可能となった。ロードセルの場合を
例にあげると、従来は補償温度範囲内に環境温度を求め
なければならなかったが、多少の温度上昇や降下はジャ
ケット部が断熱効果を発揮するため、許容できることに
なり、補償範囲の増大につながり、利用者にとっても喜
ばしい結果となった。(Effects of the Invention) (t4) The present invention is configured as described above, and since accurate measurement is always possible regardless of the measurement environment temperature, measurement values can be corrected as in the conventional method. no longer needed,
This made it possible to perform precise measurements. Taking the case of a load cell as an example, conventionally the environmental temperature had to be determined within the compensation temperature range, but since the jacket part exerts an insulating effect, slight temperature rises and drops can now be tolerated and compensated. This led to an increase in the range, which was a pleasing result for users.
また、乾燥室などのように室温が刻々変化していく中で
の測定にあっては、零点の補正が困難であったが、セル
の内部空間１０を一定温度に保つことで乾燥室内の複雑
な温度変化に左右されることのない、正確な測定を可能
とした。In addition, when performing measurements in a drying room where the room temperature is constantly changing, it is difficult to correct the zero point, but by keeping the internal space 10 of the cell at a constant temperature, the complex This enables accurate measurements that are unaffected by temperature changes.
第１図は、一般的なロードセルの内部断面図。
第２図は、ジャケット部を設けたロードセルの断面図。
第：１図は、第４図の１４而図。
第４図は、第２図のロードセルに内部空間の温度測定用
センサーを取り付けたロードセル。FIG. 1 is an internal sectional view of a typical load cell. FIG. 2 is a sectional view of a load cell provided with a jacket portion. Figure 1 is the 14th figure in Figure 4. Figure 4 shows a load cell in which a sensor for measuring the temperature of the internal space is attached to the load cell shown in Figure 2.
Claims (1)
置において、装置の検出部本体を二重ジャケット構造の
中に収めたことを特長とする、ブリッジ回路を利用した
計測装置。（２）前記、ブリッジ回路を利用した計測装
置において、変位を感知する検出部本体の温度を測定す
る温度センサーを取り付けたことを特長とする特許請求
の範囲第１項記載のブリッジ回路を利用した計測装置。(1) A measuring device using a bridge circuit, such as a load cell, characterized in that the main body of the detecting section of the device is housed in a double jacket structure. (2) The bridge circuit according to claim 1, characterized in that the measurement device using the bridge circuit is equipped with a temperature sensor that measures the temperature of the main body of the detection unit that senses displacement. Measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63157523A JPH026722A (en) | 1988-06-25 | 1988-06-25 | Measuring instrument utilizing bridge circuit which causes no temperature drift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63157523A JPH026722A (en) | 1988-06-25 | 1988-06-25 | Measuring instrument utilizing bridge circuit which causes no temperature drift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH026722A true JPH026722A (en) | 1990-01-10 |
Family
ID=15651533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63157523A Pending JPH026722A (en) | 1988-06-25 | 1988-06-25 | Measuring instrument utilizing bridge circuit which causes no temperature drift |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH026722A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107186395A (en) * | 2017-06-15 | 2017-09-22 | 山东大学 | A kind of reinforcing rib meter cooling protection device |
-
1988
- 1988-06-25 JP JP63157523A patent/JPH026722A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107186395A (en) * | 2017-06-15 | 2017-09-22 | 山东大学 | A kind of reinforcing rib meter cooling protection device |
| CN107186395B (en) * | 2017-06-15 | 2023-09-26 | 山东大学 | Cooling protection device for reinforcement meter |
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