JPS6050435A - Automatic moisture meter - Google Patents
Automatic moisture meterInfo
- Publication number
- JPS6050435A JPS6050435A JP15849283A JP15849283A JPS6050435A JP S6050435 A JPS6050435 A JP S6050435A JP 15849283 A JP15849283 A JP 15849283A JP 15849283 A JP15849283 A JP 15849283A JP S6050435 A JPS6050435 A JP S6050435A
- Authority
- JP
- Japan
- Prior art keywords
- sample
- weight
- value
- container
- drying
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
- G01N5/045—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder for determining moisture content
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の属する技術分野）
本発明は、セメント、鉱石などの物質に含捷れる水分を
、加熱乾燥減少方式により連続的に測定する自動水分計
に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical field to which the invention pertains) The present invention relates to an automatic moisture meter that continuously measures moisture contained in substances such as cement and ore using a heating drying reduction method.
（従来技術）
鉄鉱石、木材１紙、土、穀類などの物質に含ま一、−＋
、、、□、ｗｗ−＋＋、ｙ−１＋＋＋１？−ｊｌＡｌ−
＋、１ｒ−＋ａ＊二、ｌシ４伯ｎ１７゜収方式、誘電率
変化型、抵抗変化型、中性子放射型、加熱乾燥減少型な
どが提案されている。(Prior art) Contained in substances such as iron ore, wood, paper, soil, grains, -+
,,,□,ww-++,y-1+++1? -jlAl-
+, 1r-+a*2, lshi4rakun17° collection methods, permittivity change type, resistance change type, neutron radiation type, heat drying reduction type, etc. have been proposed.
しかし、前記した測定装置のなかで、測定結果が直′Ｍ
ｊ：重量値で得られ、そして測定結果を得る過程で何ら
の仮足も入らないことから、加熱乾燥減少方式が最も信
頼性がある。However, among the above-mentioned measuring devices, the measurement results are not accurate.
j: The heat-drying reduction method is the most reliable because it is obtained as a weight value and no pseudopodia are introduced in the process of obtaining the measurement results.
この加熱乾燥減少方式の測定装置によると、天ひんを組
込み、測定対象を加熱乾燥する時間をあらかじめ実験的
に決めておき、この時間をタイマにセットして刀ａ熱乾
床全行なっていた。このタイマによる設定方式によると
、測定対象の含水量が大幅に異なっているため、すべて
の水分が蒸発し切らないうちに乾珠が終丁したとみなし
てしまい、この時点で測だ全行なうため測定結果の信頼
性は完全なものであるとすることができなかった。また
、測定対象の址を一定にしなければ、７ＩＯ熱乾燥時間
を一定に設定しても無意味なものとなる。従って、常に
一定量の測定対象を装置に供給することが必要となるが
、棟々の大きさの塊状体を含む困難である。更に有慣性
試料の場合は、ものによっては乾燥し過・ぎて、その試
料にいわゆる「焼け」を与【カ→、また測定結果に信頼
性がなく、場合によっては発火や有毒ガスの発生という
危険も伴なうのである。According to this heating-drying reduction method measuring device, a balance is built in, the time for heating and drying the measurement object is determined in advance experimentally, and this time is set on a timer to carry out all the heat-drying operations. According to this setting method using a timer, since the moisture content of the measurement target differs significantly, it is assumed that the dry beads have reached the end before all the moisture has evaporated, and all measurements are taken at this point. The reliability of the measurement results could not be guaranteed to be complete. Further, unless the area of the measurement target is kept constant, it is meaningless even if the 7IO thermal drying time is set constant. Therefore, it is necessary to always supply a certain amount of the object to be measured to the apparatus, but this is difficult due to the presence of lumps the size of ridges. Furthermore, in the case of inertial samples, some may dry out too much, causing what is called "burning" on the sample, making the measurement results unreliable, and in some cases causing ignition or generation of toxic gas. It also comes with danger.
（発明の目的）
本発明は、前記した従来技術の有する欠点を解消するも
ので、試料加熱前の試料重量を基準値とし、試料の加熱
乾燥後の試刈重量と比較減算し、この比較減算した偏差
重量が゛所定時間内に許容範囲値を超えるか否かの比較
判定を行なって試料の加熱乾燥の終了を検知し、試料に
乾燥不足又は過剰乾燥を与えることなく試料の水分率を
めることのできる自動水分計を提供することを目的とす
る。(Objective of the Invention) The present invention solves the drawbacks of the prior art described above, and uses the sample weight before heating the sample as a reference value, compares and subtracts it with the sample weight after heating and drying the sample, and subtracts the weight of the sample after heating and drying the sample. Compare and judge whether the deviation weight exceeds the allowable range value within a predetermined time to detect the end of heating drying of the sample, and determine the moisture content of the sample without under-drying or over-drying the sample. The purpose is to provide an automatic moisture meter that can
（発明の構成）
第１図は、本発明の構成ｒ明示するための・４能ブロッ
ク図である。(Configuration of the Invention) FIG. 1 is a four-function block diagram for clearly explaining the configuration of the present invention.
同図において、試料ｉ量検出手段により加熱前の試料重
量を横出し、これを基準値とする。そして偏差、重量検
出手段により、その基準値と試料の加熱乾燥後の時々刻
々変化する試料重量との比較減算をして偏差重量をめ、
比較判別手段によりその偏差重量が所・定時間内に許容
範囲値を超えるか否かの比較判別をする。偏差重量が所
定時間内に許容範囲値を超える場合にはそのときの試料
重量をその後に入力される試料重量に対する基準値とす
る。面差軍歌が所定時間内に許容範囲値を超えない場合
には、演算手段により最後に検出された試料重量と加熱
前の試料重量とから水分率を演算してめる。In the same figure, the weight of the sample before heating is obtained horizontally by the sample i amount detection means, and this is taken as a reference value. Then, using the deviation and weight detection means, the standard value is compared and subtracted from the sample weight that changes every moment after heating and drying the sample, and the deviation weight is determined.
The comparison and determination means compare and determine whether the deviation weight exceeds the allowable range value within a predetermined time period. If the deviation weight exceeds the allowable range value within a predetermined time, the sample weight at that time is used as the reference value for the sample weight input thereafter. If the surface difference gunka does not exceed the allowable range value within a predetermined time, the calculation means calculates the moisture content from the last detected sample weight and the sample weight before heating.
以下図面を参照して本発明の自動水分計の実施例？］ｌ
−説明する。Examples of the automatic moisture meter of the present invention with reference to the drawings below? ]l
-Explain.
（実施例（第２図〜第４図）） 第２図は、本発明の自動水分計の実施例、の全体ｈ−１ 構成図を示す。(Example (Figures 2 to 4)) FIG. 2 shows the whole h-1 of the embodiment of the automatic moisture meter of the present invention. A configuration diagram is shown.
同図において、１ｌＩｌｉ：測定される試料粉体自体せ
る試料容器である。３は試料粉体を貯蔵する貯槽であり
、４はフィーダで、後述するＣＰＵからの充填指令によ
り所定量の試料粉体を試料容器１に供給する。２−１．
２−２は試料容器移動装置であり、ＣＰＵからの移動指
令信号により、試料容器移動装置２−１は試料容器ｌを
貯槽３から後述する試料粉体を加熱しかつ重量測定をす
る加熱・重量測定部と試料粉体排出部とに送り、試料容
器移動装置２−２はその逆の動作を行なう。５はニクロ
ーム線などで構成される熱源で熱源制御装置６に接続さ
れてお抄、熱源制御装置６はＣＰＵからの指令信号に従
って熱源５に電流を流したり、断ったりする制御を行な
う。７は試料排出装置であり、プロワ８に接続されてい
る。プロワ８の近傍には試料排出ロア１とエヤー排気ロ
ア２が設けられている。プロワ８はＣＰ’Ｕからの指令
信号を受けて、試料容器１に載せられている試料粉体を
吸引し、試料粉体は試料粉体排出ロア１を介して外部に
排出し、エヤーはエヤー排気ロア□を介して大気中に排
気する。１０は天びん皿、９は天びん、ｌｌは重量変換
器であり、大びん皿ｌＯに載っている試料容器１と試料
粉体の重量を測定し、重量変換１−＝１１−ｈ＞Ｉニー
７＋ｎ／ｒＪ−トＷ＄：ｍ七ｒｈ＋１−１？う（イ’ｔ
−８が１＋！−イ〉ターフエース
力される。１２はＡＤ変換ｑ１重量変換器１１から入力
されるアナログ信号音デジタルＩＣ号に変換し、インタ
ーフェース１６を介してＣＰＵに入力する。１９は表示
器で、ＣＰＵでめられた試料粉体の水分率を表示する。In the figure, 1lIli is a sample container in which the sample powder to be measured itself is placed. 3 is a storage tank for storing sample powder, and 4 is a feeder, which supplies a predetermined amount of sample powder to sample container 1 in response to a filling command from a CPU, which will be described later. 2-1.
Reference numeral 2-2 is a sample container moving device, and in response to a movement command signal from the CPU, the sample container moving device 2-1 moves the sample container l from the storage tank 3 to a heating/weighing device that heats the sample powder described later and measures its weight. The sample container moving device 2-2 performs the opposite operation. Reference numeral 5 denotes a heat source composed of a nichrome wire, etc., which is connected to a heat source control device 6, and the heat source control device 6 performs control to supply or cut off current to the heat source 5 in accordance with command signals from the CPU. 7 is a sample discharge device, which is connected to the blower 8. A sample discharge lower 1 and an air exhaust lower 2 are provided near the blower 8. The blower 8 receives the command signal from the CPU'U, sucks the sample powder placed on the sample container 1, discharges the sample powder to the outside via the sample powder discharge lower 1, and uses the air Exhaust to the atmosphere via the exhaust lower □. 10 is a balance pan, 9 is a balance, and 1 is a weight converter, which measures the weight of the sample container 1 and sample powder placed on the large bottle pan 1O, and calculates the weight conversion 1-=11-h>I knee 7+n. /rJ-toW$:m7rh+1-1? U (I't)
-8 is 1+! -B〉Turf Ace is powerful. Reference numeral 12 converts the analog signal sound input from the AD converter q1 weight converter 11 into a digital IC signal, and inputs it to the CPU via the interface 16. A display 19 displays the moisture content of the sample powder determined by the CPU.
１８はキイボードなどを備えた入力装置で、その入力信
号はインターフェース１６を介してＣＰＵに入力される
。このキイボード１８は、プロセスの結果によっては、
水分率で表示せず、乾燥終了時の試料重量で表示させる
必要のある場合に、表示器１９の表示モードを切換えた
り、また測定終了点を検出する複数種類の許容範囲値上
ｌなどが誓込まれているＲＯｔｖ１４から任意のものを
選択するための入力装置として使用するものである。１
８はＣＰＵである。Reference numeral 18 denotes an input device including a keyboard, and input signals thereof are input to the CPU via the interface 16. Depending on the result of the process, this keyboard 18 may
If it is necessary to display the sample weight at the end of drying instead of the moisture content, it is possible to switch the display mode of the display 19, or to set multiple types of tolerance values to detect the measurement end point. It is used as an input device for selecting an arbitrary item from the included ROtv14. 1
8 is a CPU.
１４はｕ ＯＭで、前回重量測定した試料粉体自体の重
量と今回重量測定した試料粉本自体の重量との差が成る
範囲値以内にあるか否かを判別する許容範囲値±ｌがあ
らかじめ記憶されている。１５はルＡＭで、試料容器１
自体の重量、即ちいわゆに載せられた試料粉体、との重
量Ｗ１が記憶され、更にＣＰＵ１３において前記した重
量ＷＩから試料容器１自体の重量Ｗ。を差引いた試料粉
体自体の重量Ｗ１ｏが基準値として記憶される。そして
試料粉体に対する加熱乾燥が開始されて時々刻々変化す
る試料粉体自体の重量を前記した基準値”１０から減算
し、その偏差値とＲ，０Ｍ１４にセットされている許容
範囲値上ｌとの比較を行ない、所定時間内に許容範囲値
±ｌを超えるならばその時の試料重量を基準値ＷＩＩと
して１（ＡＭＩ ５に新たに記憶させる。このような減
算１判定動作を反復して行ない、所定時間内に許容範囲
埴土ｌを超える場合はその時の試料粉体自体の重量を基
準値として几ＡＭ１５に新たに記憶させる。このように
して試料粉体自体の重量がル回目に記憶された基準値Ｗ
１１を中心とし許容範囲値±ｌを所定時間超えない底台
には、試料粉体中の水分は蒸発してしまったと判断し、
このときの最終の試料重量Ｗ４をＷ、。として几ＡＭ１
５に記憶させる。なお、タイマ１７から前記した所定時
間がＣＰＵ１Ｂに入力される。14 is u OM, which has a tolerance range value ±l that determines whether the difference between the weight of the sample powder itself measured last time and the weight of the sample powder itself weighed this time is within the range value. remembered. 15 is Le AM, sample container 1
The weight W1 of the sample container 1 itself, that is, the weight W1 of the sample powder placed on the sample container 1 is stored, and the CPU 13 calculates the weight W of the sample container 1 itself from the weight WI described above. The weight W1o of the sample powder itself after subtracting the value W1o is stored as a reference value. Then, the weight of the sample powder itself, which changes from moment to moment after heat drying of the sample powder is started, is subtracted from the reference value "10", and the deviation value and the upper limit of the allowable range set in R,0M14 are calculated. If it exceeds the allowable range value ±l within a predetermined time, the sample weight at that time is set as the reference value WII and newly stored in the AMI 5. Repeat this subtraction 1 judgment operation, If the allowable range Hando is exceeded within a predetermined time, the weight of the sample powder itself at that time is newly stored in the AM15 as a reference value.In this way, the weight of the sample powder itself becomes the standard stored for the second time. value W
If the bottom stand does not exceed the allowable range value ±l for a predetermined time centered on 11, it is determined that the water in the sample powder has evaporated,
The final sample weight W4 at this time is W. As几AM1
5 to be memorized. Note that the above-mentioned predetermined time is input from the timer 17 to the CPU 1B.
そして、ＣＰＵ１Ｂにおいて第１回目に記憶された試料
粉体自体の重量ＷＩｏと前記した重量Ｗ、８をＲＡＭ１
５から読出し、周知の水分率演算式Ｗ、ｏ−Ｗ、、／Ｗ
、ｏｘ ｌＱＱ・・・（１）の式から水分率Ｗをめるの
である。Then, the weight WIo of the sample powder itself stored in the first time in the CPU 1B and the above-mentioned weight W, 8 are stored in the RAM 1B.
5 and the well-known moisture content calculation formula W, o-W, , /W
, ox lQQ...The moisture content W is calculated from the equation (1).
第３図は試料粉体自体の重量を縦軸に、時間を横軸にと
り、加熱乾燥を開始してからの試料粉体の重量変化グラ
フである。ＷＩｏは、前に説明したように試料粉体自体
の重量で、この値と加熱により時々刻々変化する試料粉
体自体の重量との減算を行ない、その値が許容範囲埴土
ｌを超える時に、その時の試料粉体自体の重量Ｗ１．が
基準値としてＩＩ、ＡＭＩ５に新たに記憶される。Ｗ１
□＋ ’ｗ、３＋ Ｗ＋、、についても同様にＲ，Ａ＋
／１５に記憶される。そしてＷ、１から時々刻々変化す
る試料粉体自体の重量罵を減算した値が、許容範囲値±
４を所定時間にわたって超えない場合に、試料粉体の乾
燥は終了したと判定する。FIG. 3 is a graph of changes in the weight of the sample powder after the start of heat drying, with the weight of the sample powder itself taken as the vertical axis and time taken as the horizontal axis. As explained earlier, WIo is the weight of the sample powder itself, and this value is subtracted from the weight of the sample powder itself, which changes from time to time due to heating. The weight of the sample powder itself W1. is newly stored in II, AMI5 as a reference value. W1
Similarly, for □+ 'w, 3+ W+, , R, A+
/15 is stored. Then, the value obtained by subtracting the weight of the sample powder itself, which changes from time to time, from W, 1, is the allowable range value ±
4 for a predetermined period of time, it is determined that the drying of the sample powder has been completed.
次に以上のように構成された装置の作用を説明する。Next, the operation of the device configured as above will be explained.
測定を終了した試料容器ｌは、試料容器移動装置２−１
により試料排出装置７の直下に移動させられ、プロワ８
がＣＰＵ１８から指令信号を与えられて回転駆動され、
試料容器１に載せられた試料粉体を吸込み、試料排出ロ
ア１から排出し、排出空気ロア２からエヤーが排気され
る。試料排出動作が終了すると、ＣＰＵ１３から試料容
器移動装置２−２に指令信号が与えられ、試料容器ｌを
試料貯槽８の位置する所に送るのであるが、天びん皿１
０を通過する際に試料容器ｌ自体の重量、即ちいわゆる
風袋重量Ｗ。を測定し、重量変換器１１から出力される
電気信号をＡＤ変換器１２に加え、そのデジタル出力信
号をＣＰＵ１８を介しＲＡＭ１５に記憶させる。ＣＰＵ
１３からフィーダ４に指令信号が加えられると、試料貯
槽８の下に位置する試料容器１に所定数の試料粉体を供
給する。その際、試料容器１はＣＰＵ１８から指令信号
を受けた試料容器移動装置２−１によりゆっくりと移動
させられるので、一様な厚みをもって試料粉体が試料容
器１に載置される。所足量の試料粉体の供給が終了する
と、試料容器移動装置２−１にＣＰＵＩ ３から指令信
号が与えられ、試料容器１を天びん皿１０に送る。この
とき、試料容器それ自体の重量Ｗ。The sample container l that has completed the measurement is transferred to the sample container moving device 2-1.
The sample is moved directly below the sample ejection device 7, and the blower 8
is rotationally driven by receiving a command signal from the CPU 18,
The sample powder placed on the sample container 1 is sucked in and discharged from the sample discharge lower 1, and air is exhausted from the discharge air lower 2. When the sample discharge operation is completed, a command signal is given from the CPU 13 to the sample container moving device 2-2, and the sample container l is sent to the location where the sample storage tank 8 is located.
The weight of the sample container l itself when passing through zero, that is, the so-called tare weight W. is measured, an electrical signal output from the weight converter 11 is applied to the AD converter 12, and the digital output signal is stored in the RAM 15 via the CPU 18. CPU
When a command signal is applied to the feeder 4 from the feeder 13, a predetermined number of sample powders are supplied to the sample container 1 located below the sample storage tank 8. At this time, the sample container 1 is slowly moved by the sample container moving device 2-1 which receives a command signal from the CPU 18, so that the sample powder is placed on the sample container 1 with a uniform thickness. When a sufficient amount of sample powder has been supplied, a command signal is given from the CPUI 3 to the sample container moving device 2-1, and the sample container 1 is sent to the balance pan 10. At this time, the weight W of the sample container itself.
と試料粉体とを加えた総重量ＷＩが測定され、この重量
値は重量変換器１１により電気信号に変換され、ＡＤ変
換器１２によりデジタル信号に変換されてＣＰ Ｕ １
．８に入力され、その総重量ｗＩから試料容器１自体の
重量Ｗ。を減算し、得られた試料粉体自体の重量Ｗ１ｏ
を基準値として几ＡＭ１５に記憶させる。ＣＰＵ１３が
ら熱源制御装置６に指令信号が与えられ、熱源制御装置
ｉ１６は熱ｉ５に通電を開始して試料容器１の試料粉体
を加熱する。この加熱により試料粉体から水分が蒸発し
て行き、その時々刻々に変化する重量が天びん９により
測定される。一方、ＲＯ’Ｍ１４には、重量変化の許容
範囲値±ｌがあらがじめセットされている。ＣＰＵ１３
には重量変換器１１から出方される時々刻々変化する試
料重量がＡＤ変換器１２を介して入力される。基準値凧
。とその試料重量との比較減算を竹ない、比較減算の結
果得られた偏差重量がタイマ１７により設定された所定
時間内に几０Ｍ１４にセットされている許容範囲値上ｌ
を超えるか否かの比較利足をする。偏差重量が所定時間
内に許容範囲値上ｌを超える場合にはそのときの試料重
量を基準値Ｖｖ、、としてＲＡ Ｍ １．５に記憶させ
る。このような比較動作を反復し、ＲＡＭ１５にｗｌ
２１ Ｗｌ ３ ＋・・・Ｗ１□の値を記憶させる。そ
して、Ｗｌ の直と時々刻々変化して入力される試料重
量との差が所定時間の間に几０Ｍ１４にセットされた許
容範囲値±ｌを超えない場合には、試料粉本に含まれる
水分は蒸発してし壕つだと考えられるので、前記した場
合にはＣＰＵ１３は加熱乾燥へ点に至ったと判断する。The total weight WI, which is the addition of the sample powder and
．． 8, and the weight W of the sample container 1 itself is inputted from the total weight wI. The weight of the sample powder itself obtained by subtracting W1o
is stored in the AM 15 as a reference value. A command signal is given to the heat source control device 6 from the CPU 13, and the heat source control device i16 starts energizing the heat i5 to heat the sample powder in the sample container 1. This heating causes water to evaporate from the sample powder, and the weight, which changes moment by moment, is measured by the balance 9. On the other hand, in the RO'M 14, a weight change tolerance range value ±l is preset. CPU13
The ever-changing sample weight output from the weight converter 11 is inputted via the AD converter 12. Reference value kite. The deviation weight obtained as a result of the comparison and subtraction is calculated within the predetermined time set by the timer 17 above the allowable range value set in 14.
Comparative profit is made to see whether it exceeds or not. If the deviation weight exceeds the allowable range value l within a predetermined time, the sample weight at that time is stored in RAM 1.5 as a reference value Vv, . By repeating such a comparison operation, wl is stored in the RAM 15.
21 Wl 3 +...The value of W1□ is stored. If the difference between the Wl value and the sample weight input as it changes from moment to moment does not exceed the tolerance value ±l set in the 0M14 during a predetermined period of time, the moisture contained in the sample powder is determined. It is considered that the water has evaporated and dried, so in the above case, the CPU 13 determines that the heating and drying process has reached the point.
これにより、ＣＰＵ１Ｂから熱源制御装置６に指令信号
が与えられ、熱源５への追′醒を停止する。同１時に、
ＣＰＵ１３は、そのときの最終の試料重量もセ最終重量
Ｗ、８としてＲＡＭ１５に記憶させ、そして（１）式ｗ
＝’ Ｗ、ｏ−Ｗ、、 ／ Ｗ、ｏｘ ｌＱＱの演算
を行なって、試料粉体の水分率Ｗｌ求め、この値をイン
ターフェース１６紮介して表示器１９に表示する。次に
、ＣＰＵ１３から試料容器移動装置２−１に指令信号を
与え、試料容器ｌを試料排出装置７へ移動させる。As a result, a command signal is given from the CPU 1B to the heat source control device 6, and further heating of the heat source 5 is stopped. At 1 o'clock,
The CPU 13 also stores the final sample weight at that time in the RAM 15 as the final weight W,8, and then uses the formula (1) w.
=' W, o-W, , / W, ox lQQ is calculated to determine the moisture content Wl of the sample powder, and this value is displayed on the display 19 via the interface 16. Next, a command signal is given from the CPU 13 to the sample container moving device 2-1 to move the sample container l to the sample discharging device 7.
なお、前記した実施例において試料容器１に試料粉体を
載せる場合について読明しだが、試料容器に代えてベル
トコンベヤにより試料粉体を搬送する場合にも、本発明
は適用することができる。In the above-described embodiment, the sample powder is placed on the sample container 1, but the present invention can also be applied to a case where the sample powder is transported by a belt conveyor instead of the sample container.
この場合、ベルトコンベヤ上に試料供給部、試料加熱部
及び掻き取り式の試料排出部を設けると共に、ベルトコ
ンベヤに重量測定装置を設ける構成にする。また、熱源
としてニクローム線の如き抵抗加熱方式以外の高周波加
熱方式を用いることもできる。In this case, a sample supply section, a sample heating section, and a scraping-type sample discharge section are provided on the belt conveyor, and a weight measuring device is provided on the belt conveyor. Moreover, a high frequency heating method other than a resistance heating method such as a nichrome wire can also be used as the heat source.
第４図において、本発明の自動水分計の制御を実行する
フローチャートを示す。なお、図中■から０はフローチ
ャートの各ステップを示す。FIG. 4 shows a flowchart for controlling the automatic moisture meter of the present invention. In addition, in the figure, ◯ to 0 indicate each step of the flowchart.
本発明の自動水分計７を作動させると、ステップのにお
いてそのｉ＋ｌＪ 御装置がスタートし、ステップ■に
おいて試料容器１自体の重量、即ちいわゆる風袋重量Ｗ
。を天ひんで測定し、その値を１もＡＩＶ１５に記憶さ
せる。ステップ■において試料容器１に試料粉体を載せ
その総重量Ｗ１を測定し、その値をＲＡＭＩ ５に記憶
させる。ステップ■において総重量Ｗｌから試料容器１
自体の重量Ｗ。を減算し、得られた試料粉体自体の重量
を基準値Ｗ１ｏとしてＲＡＭ１５に言己憶させる。ステ
ップ゛■においてＣＰＵ１３から熱源制御装置６に加熱
開始指令信号を与え、熱源５に通電を開始し、試料容器
１に載せられている試料粉体を加熱する。ステップ■に
おいて試料粉体自体の重量Ｗ、ｏを基準値とし加熱によ
り時々刻々減少する試料粉体自体の入力重量を比較減算
し、この比較減算した・−差重量値が所定時間内に許容
範囲値上４を超えるか否かの比較判断を行ない、所定時
間内に許容範囲値上４を超える場合には、その時に入力
された試料粉体自体のｆｉｔをその後に入力される試料
粉体自体の重量に対し比較減算を行なうための基準値と
してＲＡＭ１５に記憶させる。そして所定時間内に許容
範囲値士Ｉｆ超えない場合には、試料粉体から水分が蒸
発し乾燥が終了したと判断し７、次のステップに進むの
である。これを詳述すると、試料粉体自体の重量Ｗ１ｏ
と入力される時々刻々減少する試料粉体自体の重量とを
比較減算し、この比較減算の結果得られた偏差重量が所
定時間内にＲ，０Ｍ１４に記憶されている許容範囲値上
ｌを超えるか否かの比較判断を行ない、所定時間内に許
容範囲値上４を超える場合には、その時に入力された試
料粉体自体の重量を基準値Ｗ１．としてＲＡＭＩ ５に
記憶させる。次に、その基準値Ｗ１１と時々刻々減少す
る試料粉体自体の重量との比較減算を行ない、比較減算
の結果得られた偏差重量が所定時間内に許容範囲値±４
を超えるか否かの比較判断をし、所定時間内に許容範囲
値±ｌを超える場合には、その時に入力された試料粉体
自体の重量を基準値Ｗ１２として几ＡＭ１５に記憶させ
る。このような比較判断を複数回反復する。そしてｎ回
目に得られた基準値Ｗ１．．と入力される試料粉体自体
の重量との比較減算を行ない、比較減算の結果得られた
偏差重量が所定時間内に許容範囲値±ｌを超えない場合
には、そのときの試料重量を最終の試料重量値Ｗ、とし
試料粉体から水分が蒸発し、加熱乾燥が終了したと判断
する。ステップ７において、その最終の試料重量値Ｗル
をＷ１８としてＲＡＭ１５に記憶させると共に、熱源制
御装置６に加熱停止の信号を与えて試料粉体への加熱を
停止する。ステップ■においてＲＡＭ１５から基準値Ｗ
ｌｏとＷ１□を読出し演算を行なって水分率をめる。ス
テップ■において、得られた水分率を表示器１９に表示
させ、加熱終了した試料容器を試料排出部に送り、ブロ
ワを回転駆動させ、試料粉体を吸込んで排出し、ステッ
プＯＣ（おいて自動水分計の制御装置の作動が終了する
。When the automatic moisture meter 7 of the present invention is operated, its i+lJ control device starts in step 2, and in step 2 the weight of the sample container 1 itself, that is, the so-called tare weight W.
. Measure with a balance and store the value 1 in AIV15. In step (2), the sample powder is placed in the sample container 1, its total weight W1 is measured, and the value is stored in the RAMI 5. In step ①, from the total weight Wl to the sample container 1
Its own weight W. The weight of the obtained sample powder itself is stored in the RAM 15 as a reference value W1o. In step (2), the CPU 13 gives a heating start command signal to the heat source control device 6, starts supplying electricity to the heat source 5, and heats the sample powder placed on the sample container 1. In step 2, the input weight of the sample powder itself, which decreases moment by moment due to heating, is compared and subtracted using the weights W and o of the sample powder itself as reference values, and the difference weight value after this comparison and subtraction is within the allowable range within a predetermined time. A comparative judgment is made to determine whether or not the value exceeds the upper limit of 4, and if it exceeds the allowable range of 4 within a predetermined time, the fit of the sample powder itself input at that time is compared to the fit of the sample powder itself input later. This is stored in the RAM 15 as a reference value for comparison and subtraction with respect to the weight of . If the allowable range value If is not exceeded within a predetermined period of time, it is determined that the moisture has evaporated from the sample powder and drying has been completed, and the process proceeds to the next step. To explain this in detail, the weight W1o of the sample powder itself
Compare and subtract the weight of the sample powder itself, which is input as input, and which decreases moment by moment, and the deviation weight obtained as a result of this comparison and subtraction exceeds the allowable range value stored in R,0M14 within a predetermined time. If it exceeds the allowable range value 4 within a predetermined time, the weight of the sample powder itself input at that time is set to the reference value W1. It is stored in RAMI 5 as Next, the reference value W11 is compared and subtracted with the weight of the sample powder itself, which decreases from moment to moment, and the deviation weight obtained as a result of comparison and subtraction is within a predetermined time within the allowable range value ±4.
A comparative judgment is made as to whether or not the value exceeds the allowable range value ±l, and if the allowable range value ±l is exceeded within a predetermined time, the weight of the sample powder itself input at that time is stored in the AM 15 as a reference value W12. Such comparative judgments are repeated multiple times. Then, the reference value W1 obtained the nth time. ．． Compare and subtract the input weight of the sample powder itself, and if the deviation weight obtained as a result of comparison and subtraction does not exceed the allowable range value ±l within a specified time, the sample weight at that time is used as the final sample weight. Assuming that the sample weight value is W, it is determined that the water has evaporated from the sample powder and the heating drying has been completed. In step 7, the final sample weight value W1 is stored in the RAM 15 as W18, and a heating stop signal is given to the heat source control device 6 to stop heating the sample powder. At step ■, the reference value W is stored in RAM15.
Read lo and W1□ and calculate the moisture content. In step (2), the obtained moisture content is displayed on the display 19, the heated sample container is sent to the sample discharge section, the blower is driven to rotate, the sample powder is sucked in and discharged, and step OC (automatic The operation of the moisture analyzer control device is terminated.
（発明の効果）
以上説明したように本発明によると、加熱前の試料重量
と加熱乾燥開始後の試料重量とを比較減算し、比較減算
の結果得られた偏差重量が所定時ｉＭｊ内に許容範囲値
を超えるか否かの比較判定をし、超えない場合には試料
の加熱乾燥が終了したと判断して水分率をめる構成とし
たから、試料の種類が相違しても、また試料が同一種類
であって含水量が相違する場合であっても、乾燥不足や
過剰乾燥による測定誤差を招来することなく正確に水分
率の測定を行なうことができると共に、測定前に試料の
乾燥実験をしたり、試料の乾燥状態をチェックする必要
もないので、簡単に水分率の測定を行なうことができる
。(Effects of the Invention) As explained above, according to the present invention, the weight of the sample before heating and the weight of the sample after the start of heat drying are compared and subtracted, and the deviation weight obtained as a result of the comparison and subtraction is within the allowable range iMj at a predetermined time. A comparison is made to determine whether or not the range value is exceeded, and if the range value is not exceeded, it is determined that the sample has been heated and dried, and the moisture content is calculated. Even if the samples are of the same type but have different moisture contents, it is possible to accurately measure the moisture content without causing measurement errors due to insufficient drying or over-drying. Since there is no need to dry the sample or check the dryness of the sample, the moisture content can be easily measured.
８１図は本発明の・機能ブロック図、第２図から第４図
は本発明の自動水分計の実施例を示し、第２図はその全
体構成図、第３図は加熱乾燥後の試料重量の変化を示す
グラフ、第８図はフローチャートを示す。
図中、１は試料容器、２−１と２−２は試料容器移動装
置、３は試料貯槽、手はフィーダ、５は熱源、６は熱源
制御装置、７は試料排出装置、８はブロワ、９は天びん
、１１は重量変換器、１２はＡＤ変換器、１６はインタ
ーフェース、１７はタイマ、】３はＣＰＵ、１４はＲＯ
Ｊ１５は几ＡＪ１９は表示器を示す。Figure 81 is a functional block diagram of the present invention, Figures 2 to 4 show examples of the automatic moisture meter of the present invention, Figure 2 is its overall configuration diagram, and Figure 3 is the sample weight after heating and drying. FIG. 8 shows a flowchart. In the figure, 1 is a sample container, 2-1 and 2-2 are sample container moving devices, 3 is a sample storage tank, the hand is a feeder, 5 is a heat source, 6 is a heat source control device, 7 is a sample discharge device, 8 is a blower, 9 is a balance, 11 is a weight converter, 12 is an AD converter, 16 is an interface, 17 is a timer, ]3 is a CPU, 14 is an RO
J15 indicates a display and AJ19 indicates a display.
Claims (1)
開始後の試料重量とを比較減算して偏差重量を検出する
手段と、前記偏差重量検出手段からの出力が設定された
所定時間内に許容範囲値を超えるか否かを比較判別する
手段と、前記した加熱前の試料重量と前記偏差重量が所
定時間内に許容範囲値を超えないときの試料重量から水
分率をめる演算手段とからなる自動水分計。(1) A sample weight detection means, a means for comparing and subtracting the sample weight before heating and the sample weight after heating start to detect a deviation weight, and a predetermined time period during which the output from the deviation weight detection means is set. means for comparing and determining whether or not the above-mentioned sample weight before heating exceeds the allowable range value within a predetermined time period; Automatic moisture meter consisting of means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15849283A JPS6050435A (en) | 1983-08-30 | 1983-08-30 | Automatic moisture meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15849283A JPS6050435A (en) | 1983-08-30 | 1983-08-30 | Automatic moisture meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6050435A true JPS6050435A (en) | 1985-03-20 |
| JPH052936B2 JPH052936B2 (en) | 1993-01-13 |
Family
ID=15672921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15849283A Granted JPS6050435A (en) | 1983-08-30 | 1983-08-30 | Automatic moisture meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050435A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2692990A1 (en) * | 1992-06-25 | 1993-12-31 | Rougie Sa | Determining water content of defatted product - by automatically heating to dryness, washing with solvent and reheating to determine moisture content |
| US5807596A (en) * | 1995-06-05 | 1998-09-15 | M. G. Braibanti S.P.A. | Method for measuring moisture content along a drying line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54111889A (en) * | 1978-02-09 | 1979-09-01 | Motorola Inc | System for measuring moisture content |
| JPS5821541A (en) * | 1981-07-31 | 1983-02-08 | Shimadzu Corp | Electronic moisture meter |
-
1983
- 1983-08-30 JP JP15849283A patent/JPS6050435A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54111889A (en) * | 1978-02-09 | 1979-09-01 | Motorola Inc | System for measuring moisture content |
| JPS5821541A (en) * | 1981-07-31 | 1983-02-08 | Shimadzu Corp | Electronic moisture meter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2692990A1 (en) * | 1992-06-25 | 1993-12-31 | Rougie Sa | Determining water content of defatted product - by automatically heating to dryness, washing with solvent and reheating to determine moisture content |
| US5807596A (en) * | 1995-06-05 | 1998-09-15 | M. G. Braibanti S.P.A. | Method for measuring moisture content along a drying line |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH052936B2 (en) | 1993-01-13 |
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