JPS637345B2 - - Google Patents
Info
- Publication number
- JPS637345B2 JPS637345B2 JP55090629A JP9062980A JPS637345B2 JP S637345 B2 JPS637345 B2 JP S637345B2 JP 55090629 A JP55090629 A JP 55090629A JP 9062980 A JP9062980 A JP 9062980A JP S637345 B2 JPS637345 B2 JP S637345B2
- Authority
- JP
- Japan
- Prior art keywords
- pellets
- frequency
- pellet
- strength
- powder
- 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
- 239000008188 pellet Substances 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005469 granulation Methods 0.000 claims abstract description 9
- 230000003179 granulation Effects 0.000 claims abstract description 9
- 238000001228 spectrum Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 abstract description 9
- 238000007906 compression Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract 1
- 238000010008 shearing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/16—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using pocketed rollers, e.g. two co-operating pocketed rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/30—Feeding material to presses
- B30B15/302—Feeding material in particulate or plastic state to moulding presses
- B30B15/308—Feeding material in particulate or plastic state to moulding presses in a continuous manner, e.g. for roller presses, screw extrusion presses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (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)
- Glanulating (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は造粒機、特に圧縮成形型の造粒機で作
られるペレツトの圧壊強度を計測する装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for measuring the crushing strength of pellets made in a granulator, particularly a compression molding type granulator.
輸送，貯蔵あるいは定量化のために、粉体を一
定の大きさのペレツトに成形する手段は、従来か
ら薬品，食品，飼料あるいは燃料など各方面に適
用されている。 BACKGROUND OF THE INVENTION Methods for forming powder into pellets of a certain size for transportation, storage, or quantification have traditionally been applied in various fields such as medicine, food, feed, and fuel.
しかるに輸送や貯蔵の段階では、ペレツトには
圧縮応力が加わつたり落下したりするため、一定
値以上の圧壊強度を持つことが要求される。この
ため従来は、成形されたペレツトを適当にサンプ
リングし、引張／圧縮試験機などで強度を測定管
理していた。 However, during transportation and storage, pellets are subjected to compressive stress and fall, so they are required to have a crushing strength above a certain value. For this reason, in the past, molded pellets were appropriately sampled and their strength was measured and managed using a tensile/compression tester or the like.
しかし、ペレツト強度を造粒の段階でオンライ
ンで計測することが可能になれば、ロールの圧縮
力や回転数を制御することにより、ペレツト強度
を一定値以上にする閉ループ制御ができるように
なる。 However, if it were possible to measure pellet strength online during the granulation stage, it would be possible to perform closed-loop control to maintain pellet strength above a certain value by controlling the compressive force and rotation speed of the rolls.
本発明はこの点に鑑みなされたもので、造粒過
程でペレツトの強度を短時間に計測する手段を提
供することを目的とする。 The present invention was devised in view of this point, and an object of the present invention is to provide a means for measuring the strength of pellets in a short time during the granulation process.
本発明は、ペレツト造粒過程で発生する超音波
を受信する手段、該受信超音波信号の周波数スペ
クトル強度を得るための手段を備え、受信した超
音波信号の周波数成分の変化により、ペレツト強
度を計測することを特徴とする。 The present invention comprises a means for receiving ultrasonic waves generated during the pellet granulation process and a means for obtaining the frequency spectrum intensity of the received ultrasonic signal. It is characterized by measuring.
以下本発明を図面を用いて詳細に説明する。 The present invention will be explained in detail below using the drawings.
本発明の対象となる造粒機は圧縮成型のもの
で、代表的なものとして第１図に示すようなブリ
ケツト機がある。 The granulator to which the present invention is applied is a compression molding type, and a typical example is a briquetting machine as shown in FIG.
このブリケツト機では、矢印側から供給される
原料乾燥粉体をスクリユフイーダ３で予備圧縮し
て、低速で回転するローラ１，１′に与える。 In this briquetting machine, raw material dry powder supplied from the arrow side is preliminarily compressed by a screw feeder 3 and applied to rollers 1 and 1' rotating at a low speed.
ローラ１′は軸が水平方向に移動可能となつて
おり、常時スプリング５で加圧されている。また
回転面には目的とするペレツト形状に相当するポ
ケツト１０が多数刻まれていて、粉体はこのポケ
ツトの中で圧縮ペレツト化される。 The shaft of the roller 1' is movable in the horizontal direction, and is constantly pressurized by a spring 5. Further, a large number of pockets 10 corresponding to the desired pellet shape are cut into the rotating surface, and the powder is compressed into pellets in these pockets.
本発明はこのようにして乾燥粉体をペレツト化
するとき、かみ込み点から圧縮される粉体の粒子
が発する超音波信号（広義のAE波）の変化によ
り、ペレツト強度を計測することを特徴とする。 The present invention is characterized in that, when dry powder is pelletized in this way, pellet strength is measured by changes in ultrasonic signals (AE waves in a broad sense) emitted by powder particles compressed from the biting point. shall be.
粉体はかみ込み点でロールに接触してから、ロ
ールの回転軸中心に至る経路まで単調に増加する
圧縮力を受けるが、その過程で粒子のすべりや分
子間力あるいは吸着層の引力に打ち勝つせん断応
力を受けて、超音波を発する。 The powder is subjected to a compressive force that increases monotonically from the time it comes into contact with the roll at the point of entrainment until it reaches the center of the rotation axis of the roll, but in the process it overcomes particle slippage, intermolecular forces, and the attractive force of the adsorption layer. It emits ultrasonic waves when subjected to shear stress.
すなわち、ペレツトの圧壊極度は粒子の分子間
力，結合力あるいは吸着層の引力の増大によつて
大きくなり、応力集中による前記力の破壊などに
よつて減少し、そのとき発生する超音波の振幅，
周波数成分あるいは発生頻度が変化するので、こ
れを観測してペレツトの強度を測定することがで
きる。 In other words, the degree of crushing of the pellet increases due to an increase in the intermolecular force of the particles, the bonding force, or the attractive force of the adsorbed layer, and decreases due to the destruction of the force due to stress concentration, and the amplitude of the ultrasonic wave generated at that time increases. ，
Since the frequency component or frequency of occurrence changes, it is possible to observe this and measure the strength of the pellet.
本発明装置では第１図に示したように、ペレツ
トの発生する超音波を受信子８ａ〜８ｄで電気信
号に変換し、ブラシ７ａ〜７ｄ及びスリツプリン
グ６を介して受信する。 In the apparatus of the present invention, as shown in FIG. 1, the ultrasonic waves generated by the pellets are converted into electrical signals by the receivers 8a to 8d, and received via the brushes 7a to 7d and the slip ring 6.
次に周波数スペクトルの変化による強度測定法
について説明する。 Next, a method of measuring intensity by changing the frequency spectrum will be explained.
第４図は、ペレツト強度と超音波信号の周波数
スペクトル強度との関係の一例を示したもので、
ペレツト強度が変化すると、発生する超音波の周
波数成分がたとえば図の様に変化する。（ただし
周波数は1＜2＜3である）
これを用いて強度を測定する具体的な回路の一
実施例を示したのが第５図であり、超音波受信素
子８の信号を所定のレベルまで増幅器２２で増幅
し、その信号をそれぞれ通過帯域の異なるバンド
パスフイルタ３１〜３３に加える。 Figure 4 shows an example of the relationship between the pellet intensity and the frequency spectrum intensity of the ultrasonic signal.
When the pellet strength changes, the frequency components of the generated ultrasonic waves change, for example, as shown in the figure. (However, the frequency is 1 < 2 < 3. ) Figure 5 shows an example of a specific circuit for measuring the intensity using this. The signal is amplified by the amplifier 22 until the signal reaches the maximum, and the resulting signal is applied to bandpass filters 31 to 33 having different passbands.
フイルタ３１〜３３の出力は検波回路２３ａ〜
２３ｃにより検波後、直流増幅器２６ａ〜２６ｃ
で増幅し、表示器３４ａ〜３４ｃに与える。 The outputs of the filters 31-33 are sent to the detection circuit 23a-
After detection by 23c, DC amplifiers 26a to 26c
The signal is amplified and applied to the displays 34a to 34c.
いまフイルタ３１〜３３の通過帯域をそれぞれ
1，2及び3とすると、ペレツト強度が大きいと
きは表示器３４ｃに指示が現われ、小さいときは
表示器３４ａに指示が現われることになる。 Now the passbands of filters 31 to 33 are respectively
1 , 2, and 3 , an instruction will appear on the display 34c when the pellet strength is high, and an instruction will appear on the display 34a when it is low.
この様にして、発生する超音波のスペクトル密
度の差により、ペレツト強度を測定するのが第５
図の実施例である。 In this way, the pellet strength is measured based on the difference in the spectral density of the generated ultrasonic waves.
This is an example of the figure.
なお、ペレツト強度をさらに詳細に測定する場
合には、受信した超音波信号を一旦波形記憶装置
で記憶し、それを再生して周波数スペクトル分析
器で成分を分析するような周知の技術を適用でき
ることは云うまでもない。 In addition, when measuring pellet strength in more detail, it is possible to apply well-known techniques such as storing the received ultrasonic signal in a waveform storage device, reproducing it, and analyzing the components with a frequency spectrum analyzer. Needless to say.
また機械雑音を消去するためのフイルタを入力
部に設けたり、超音波信号の発生時の信号のみを
サンプリングするためのサンプラを設けても良
い。 Further, a filter for eliminating mechanical noise may be provided at the input section, or a sampler may be provided for sampling only the signal when the ultrasonic signal is generated.
超音波信号の変化の中でペレツト強度に関係す
るものには、上記実施例の周波数成分の変化の他
に振幅の変化や発生頻度の変化がある。次に、こ
れらの応用例について参考までに説明する。 Changes in the ultrasonic signal that are related to the pellet intensity include changes in amplitude and frequency of occurrence in addition to changes in the frequency components of the above embodiments. Next, these application examples will be explained for reference.
まず第１にペレツトから発生した超音波の振幅
変化により、強度を測定する応用例を説明する。 First, an application example will be described in which the intensity is measured by changes in the amplitude of ultrasonic waves generated from pellets.
第２図はその具体例を示す回路図であり、超音
波受信素子８からの受信信号は、不要な機械的雑
音を消去するためのフイルタ２１を介して、前置
増幅器２２に入力し必要なレベルまで増幅する。 FIG. 2 is a circuit diagram showing a specific example of this, in which the received signal from the ultrasonic receiving element 8 is input to a preamplifier 22 via a filter 21 for eliminating unnecessary mechanical noise. amplify the level.
受信信号の周波数は100k〜5MHz程度の範囲に
あり、これは検波回路２３で直流に変換した後サ
ンプルホールド回路２４の信号入力端子に与え
る。 The frequency of the received signal is in the range of about 100 kHz to 5 MHz, and after being converted to direct current by the detection circuit 23, it is applied to the signal input terminal of the sample and hold circuit 24.
また受信信号は同期回路２５にも与えられ、第
１図のロールの回転に同期させて、必要な部分の
信号のみを取込む様にサンプルホールド回路２４
を制御する。サンプルホールド回路２４の出力
は、直流増幅器２６で増幅され、指示計２７に与
えられる。 The received signal is also given to the synchronization circuit 25, and the sample and hold circuit 24 synchronizes with the rotation of the roll shown in Fig. 1 and captures only the necessary part of the signal.
control. The output of the sample and hold circuit 24 is amplified by a DC amplifier 26 and provided to an indicator 27.
振幅変化による強度は、以上の回路により測定
するもので、ペレツトの強度が変化すると超音波
受信素子の出力信号が、たとえば第３図のように
変化するので、指示計に入力される信号を観測す
ることにより、強度を測定することができるよう
になる。なお、フイルタ２１は、機械雑音が小さ
い場合は必要ではない。 The intensity due to amplitude changes is measured using the circuit described above. When the pellet intensity changes, the output signal of the ultrasonic receiving element changes as shown in Figure 3, so the signal input to the indicator can be observed. By doing so, the intensity can be measured. Note that the filter 21 is not necessary if the mechanical noise is small.
次に第６図はペレツト強度とある周波数成分
1，2の超音波の発生頻度の一例を示す図であ
る。 Next, Figure 6 shows pellet strength and certain frequency components.
2 is a diagram showing an example of the frequency of occurrence of ultrasonic waves 1 and 2. FIG.
すなわち、造粒過程で発生する超音波は離散的
であり、特定の条件では特定の周波数成分のもの
が多発する。ペレツト強度と周波数成分1及び2
の発生頻度の一例を示したのが第６図であり、こ
れを用いてもペレツト強度が測定できる。 That is, the ultrasonic waves generated during the granulation process are discrete, and under specific conditions, ultrasonic waves with specific frequency components occur frequently. Pellet intensity and frequency components 1 and 2
FIG. 6 shows an example of the frequency of occurrence of this, and pellet strength can also be measured using this.
第７図はそのための具体的な回路の一例を示し
たもので、増幅器２２で増幅された超音波信号
は、フイルタ３１で特定周波数成分のみが抽出さ
れ、波高弁別回路４０に加えられる。波高弁別回
路４０は、一定値以上の振幅を持つ入力が到来す
る毎にパルスを１個出力する。 FIG. 7 shows an example of a specific circuit for this purpose. From the ultrasonic signal amplified by the amplifier 22, only a specific frequency component is extracted by the filter 31 and applied to the pulse height discrimination circuit 40. The pulse height discrimination circuit 40 outputs one pulse each time an input having an amplitude of a certain value or more arrives.
カウンタ４１は発振器４２の出力により、一定
時間毎にクリアされ、その周期内に到来する波高
弁別回路の出力パルスを計数する。その結果は表
示器３４ａ〜３４ｃに表示する。これにより、た
とえばペレツト強度が増加すると発生頻度も増加
する周波数成分（第６図における周波数1の成
分）にフイルタ３１の通過周波数を選定している
ときは、計数回路４１の計数値が大きい程ペレツ
トの強度が大であることになり、逆にペレツト強
度が大なる程発生頻度が減少する周波数成分（第
６図2）にフイルタの通過周波数を合致せしめた
ときは、計数値が小なるほど強度が大であること
が知れる。 The counter 41 is cleared at regular intervals by the output of the oscillator 42, and counts the output pulses of the pulse height discrimination circuit that arrive within the period. The results are displayed on the displays 34a to 34c. As a result, for example, when the passing frequency of the filter 31 is selected to be a frequency component whose occurrence frequency increases as the pellet strength increases (frequency 1 component in FIG. 6), the larger the count value of the counting circuit 41, the more pellets are On the other hand, if the filter passing frequency is made to match the frequency component (Figure 6, 2 ) that occurs less frequently as the pellet strength increases, the smaller the count value, the higher the intensity. I know it's big.
このように第７図の回路により、特定周波数成
分の超音波の発生頻度を計測して、ペレツトの強
度を計測することができる。なお測定の確度を高
めるために、単一の周波数成分のみを計数するの
ではなく、第６図の1及び2あるいは他の周波数
成分を同時に計数するなどの変更も可能であるこ
とは云うまでもない。 As described above, the circuit shown in FIG. 7 allows the intensity of the pellet to be measured by measuring the frequency of occurrence of ultrasonic waves of a specific frequency component. It goes without saying that in order to increase measurement accuracy, it is possible to make changes such as counting 1 and 2 in Figure 6 or other frequency components simultaneously instead of counting only a single frequency component. do not have.
以上述べたように本発明によれば、造粒過程で
発生する超音波信号を受信し、その超音波信号の
周波数スペクトル強度を求め、この周波数成分の
変化を監視することによつて、ペレツト強度を短
時間に計測することが可能であり、工業用のプリ
ケツト機などによる造粒過程に適用すると、一定
値以上の強度のペレツトを製造可能にできるなど
の効果を有する。 As described above, according to the present invention, the ultrasonic signal generated during the granulation process is received, the frequency spectrum intensity of the ultrasonic signal is determined, and the pellet strength is determined by monitoring the change in this frequency component. can be measured in a short period of time, and when applied to the granulation process using an industrial pelletizing machine, it has the effect of making it possible to produce pellets with a strength above a certain value.
第１図は本発明を適用する造粒機の一例図、第
２図は振幅の変化によりペレツト強度を測定する
回路の一例を示す図、第３図はペレツト強度と造
粒過程で発生する超音波の振幅の関係を示す一例
図、第４図はペレツト強度と周波数成分毎のパワ
ー密度の関係を示す一例図、第５図はパワースペ
クトル密度の変化により、ペレツト強度を測定す
る回路の一実施例図、第６図はペレツト強度と特
定周波数成分の超音波の発生頻度の関係を示す
図、第７図は特定周波数成分の発生頻度を計数す
ることにより、ペレツト強度を測定するための回
路の一例を示す図である。
１…ロール、２…回転軸、３…スクリユフイー
ダ、４…ホツパ、５…スプリング、６…スリツプ
リング、７ａ〜７ｄ…ブラシ、８ａ〜８ａ…超音
波受信子、９…ペレツト、１０…ポケツト、２１
…フイルタ、２２…前置増幅器、２３…検波回
路、２４…サンプルホールド回路、２５…周期回
路、２６…直流増幅器、２７…指示計。
Fig. 1 shows an example of a granulator to which the present invention is applied, Fig. 2 shows an example of a circuit for measuring pellet strength based on changes in amplitude, and Fig. 3 shows pellet strength and excess energy generated during the granulation process. Figure 4 is an example diagram showing the relationship between the amplitude of a sound wave. Figure 4 is an example diagram showing the relationship between pellet intensity and power density for each frequency component. Figure 5 is an implementation of a circuit that measures pellet strength based on changes in power spectrum density. An example diagram, Fig. 6, is a diagram showing the relationship between pellet intensity and the frequency of occurrence of ultrasonic waves of a specific frequency component, and Fig. 7 is a diagram of a circuit for measuring pellet intensity by counting the frequency of occurrence of a specific frequency component. It is a figure showing an example. DESCRIPTION OF SYMBOLS 1... Roll, 2... Rotating shaft, 3... Screw feeder, 4... Hopper, 5... Spring, 6... Slip ring, 7a-7d... Brush, 8a-8a... Ultrasonic receiver, 9... Pellet, 10... Pocket, 21
...filter, 22...preamplifier, 23...detection circuit, 24...sample hold circuit, 25...periodic circuit, 26...DC amplifier, 27...indicator.
Claims (1)
る手段、該受信超音波信号の周波数スペクトル強
度を得るための手段を備え、受信した超音波信号
の周波数成分の変化により、ペレツト強度を計測
することを特徴とするペレツト強度計測装置。1 Equipped with means for receiving ultrasonic waves generated during the pellet granulation process and means for obtaining the frequency spectrum intensity of the received ultrasonic signal, and measuring pellet intensity based on changes in the frequency components of the received ultrasonic signal. A pellet strength measuring device featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9062980A JPS5716349A (en) | 1980-07-04 | 1980-07-04 | Method and apparatus for measuring pellet strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9062980A JPS5716349A (en) | 1980-07-04 | 1980-07-04 | Method and apparatus for measuring pellet strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5716349A JPS5716349A (en) | 1982-01-27 |
| JPS637345B2 true JPS637345B2 (en) | 1988-02-16 |
Family
ID=14003769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9062980A Granted JPS5716349A (en) | 1980-07-04 | 1980-07-04 | Method and apparatus for measuring pellet strength |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5716349A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01214731A (en) * | 1988-02-23 | 1989-08-29 | Banzai:Kk | Vehicle testing equipment |
| JPH0475940U (en) * | 1990-11-13 | 1992-07-02 | ||
| WO1997029203A1 (en) * | 1996-02-09 | 1997-08-14 | Gkss-Forschungszentrum Geesthacht Gmbh | Process for separating organic acids from a fermentation medium |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5821853U (en) * | 1981-08-03 | 1983-02-10 | 株式会社日立製作所 | Ultrasonic flaw detection equipment for pressure vessels |
| KR910009257B1 (en) | 1985-09-07 | 1991-11-07 | 히다찌 겡끼 가부시기가이샤 | Hydraulic Construction Machinery Control System |
| US11420212B2 (en) | 2016-10-24 | 2022-08-23 | Paul Gerteis | Methods and devices for controlling the dry granulation process |
-
1980
- 1980-07-04 JP JP9062980A patent/JPS5716349A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01214731A (en) * | 1988-02-23 | 1989-08-29 | Banzai:Kk | Vehicle testing equipment |
| JPH0475940U (en) * | 1990-11-13 | 1992-07-02 | ||
| WO1997029203A1 (en) * | 1996-02-09 | 1997-08-14 | Gkss-Forschungszentrum Geesthacht Gmbh | Process for separating organic acids from a fermentation medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5716349A (en) | 1982-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4121289A (en) | Method invoking tabletting compression force control for optimizing tabletted formulation parameters | |
| RU2270591C2 (en) | Method and apparatus for detecting and sorting out of foreign mixtures from cigarettes | |
| Leach et al. | Particle size determination from acoustic emissions | |
| CN110167664B (en) | Method and apparatus for controlling a dry granulation process | |
| JPS637345B2 (en) | ||
| US5589209A (en) | Method for a non-destructive determination of quality parameters in fresh produce | |
| US4386526A (en) | Method for quality control of processes and construction components | |
| NZ226290A (en) | Non-intrusive evaluation of physical property of material being milled uses acoustic signature | |
| US4179934A (en) | Method and apparatus for monitoring particle sizes | |
| WO1994011731A1 (en) | Method and apparatus for the characterization and control of powder compaction | |
| CN101147058B (en) | Determination of the average mechanical properties of the constituent particles of a material sample using ultrasound | |
| JPS5640754A (en) | Cavitation detecting method using ae sensor | |
| JPS6491031A (en) | Method and apparatus for nondestructive inspection of roller bearing | |
| CN207764002U (en) | A kind of sampler of calcium carbonate powder production line | |
| SU1555659A1 (en) | Method of nondestructive inspection of quality of carbon articles | |
| Waring et al. | Acoustic emission of pharmaceutical materials: the effect of compression speed, ejection, lubrication and tablet weight | |
| SU979958A1 (en) | Solid body wear resistance investigation method | |
| Zeng et al. | Application of vibration signals to monitoring crushing parameters | |
| SU832462A1 (en) | Method of analysis of materials with aid of acoustic emission | |
| SU989449A1 (en) | Device for checking article mechanical properties | |
| SU1019319A1 (en) | Article quality control device | |
| SU1288589A1 (en) | Device for determining strength of concrete | |
| SU766641A1 (en) | Method for measuring fineness of comminution | |
| RU2097738C1 (en) | Method of processing the shock pulse transducer signals of aerosol flux solid particles | |
| SU1320739A1 (en) | Acoustic-emission method of checking material quality |