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现代称重技术 最新质量计测技术 中英日文本2025|PDF|Epub|mobi|kindle电子书版本百度云盘下载

现代称重技术 最新质量计测技术 中英日文本
  • （日）龟冈纮一，施昌彦编著 著
  • 出版社： 北京：中国计量出版社
  • ISBN：750261382X
  • 出版时间：2000
  • 标注页数：84页
  • 文件大小：2MB
  • 文件页数：92页
  • 主题词：

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图书目录

1.FUNCTIONS AND STRUCTURES OF SCALE1

1.1 BASIC STRUCTURE AND WEIGHING PRINCIPLE1

1.2 SYSTEM CONFIGURATION OF ELECTRICAL AND ELECTRONIC SCALES2

1.3 FUNCTIONS AND SYSTEM CONFIGURATIONS OF THE SCALES FOR INDUSTRIAL USE3

1.3.1 Functional Characteristics and Classification3

1.3.2 Control Purpose4

1.3.3 System Configurations4

2.1.1 Classification of Levers7

2.1 STATICS OF LEVERS7

2.STATICS OF SCALES7

2.1.2 Single Levers8

2.1.3 Compound Lever Systems10

2.2 ROBERVAL-TYPE SCALE12

2.3 PLATFORM SCALE13

2.4 DOUBLE-BEAM-TYPE LOADCELL SCALE15

3.2.1 Undamped Case19

3.2 FREE RESPONSE19

3.1 DYNAMIC MODEL19

3.DYNAMICS OF SCALES19

3.2.2 Damped Case with Viscous Damping21

3.2.3 Damped Case with Coulomb Damping22

3.2.4 Measurement of the Static Equilibrium Position of Balance23

3.3 FORCED RESPONSE25

3.3.1 Step Response25

3.3.2 Settling Time of Scales26

3.3.3 Ramp Response28

3.3.4 Response of a Hopper Scale28

3.3.5 Frequency Response31

3.3.6 Response of Scales with Levers to the Base Excitation34

3.3.7 Response Calculation Method Using Transfer Function37

3.3.8 Response of Conveyor Belt Scales38

3.3.9 Response of Control Systems42

3.3.10 Response of a Weigh Feeder44

4.1 DIGITAL SIGNAL AND DIGITAL SYSTEM47

4.1.1 Representation of Digital Signal47

4.SIGNAL PROCESSING IN WEIGHING47

4.1.2 Block Diagram Representation and Transfer Function49

4.2 DIGITAL FILTERS50

4.2.1 FIR Filter50

4.2.2 IIR Filter51

4.2.3 Frequency Response52

4.3 DIGITAL FILTER DESIGN METHODS52

4.3.1 Impulse-invariant Method52

4.3.2 Bilinear z-transformation Method53

4.4 DIGITAL SIGNAL PROCESSING OF WEIGH SIGNAL54

4.4.1 Simulated Weigh Signal54

4.4.2 Low-pass Filter Application55

4.4.3 Notched Filter Application56

5.ANALYTICAL CONSIDERATIONS ONWEIGHING SYSTEMS59

5.1 EFFECT OF THE BASE VIBRATION ON THE SCALES COMPOUND WITH LEVERS59

5.1.1 Equation of Motion59

5.1.2 Vibrationproof Condition for Weighbeam60

5.1.3 Physical Meaning of J-balance62

5.1.4 Experimental Verification of the Vibrationproof Condition63

5.2 VIBRATIONAL CHARACTERISTICS OF DOUBLE-BEAM-TYPE LOADCELL SCALE64

5.2.1 Natural Modes64

5.2.2 Frequency Response66

5.3 COMPENSATION FOR BASE VIBRATIONS IN A DOUBLE-BEAM-TYPE LOADCELL SCALE69

5.3.1 Concept of the Compensation69

5.3.2 Equations of Motion70

5.3.3 Block Diagram Representation of the System72

5.3.4 Feasibility Test of the Theory74

5.4 PHENOMENA IN PROBABILITY AND STATISTICS FOUND IN AN ASSOCIATIVE WEIGHER76

5.4.1 Associative(Selective Combination)Weigher Model76

5.4.2 Mathematical Description of the Combinatorial Problem77

5.4.3 Mathematical Description of the Combination Process78

5.4.4 Computer Simulation Results and Considerations79

APPENDIXES82

A.1 Table of Laplace transform82

A.2 Properties of Laplas transforms83

REFERENCES84

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