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Weighing Scales

Industrial weighing scales's Improvement

Improvement to industrial weighing scales

The Improvement consisting in providing, in weighing machines or industrial weighing scales, a sequence of two, three ...n similar scales instead of only one scale (or a different device for quantity weighing); in detecting the weight of the same quantity from each scale and thus assuming, as real value, the average of two, three ...n weights obtained, by means of an appropriate computer.

This invention consists in a weighing scale for checking weight accuracy, and in other machines for industrial weighing, which use two or more weighing scales instead of only one. The scales must be similar and loaded consecutively with the mass to be checked. The scales are equipped with a device adapted to calculate the detected weight on an average. This average weight value has regularly proven to be statistically more precise than values detected by only one scale: this is the industrial invention.

Improvement to industrial weighing scales and respective devices to obtain it

It is known that the probability of defining the exact value of a physical quality increases with the number of accurate measurements made on it and by averaging the obtained values. Restricting the principle to measuring of weight, the precision will increase by weighing the same object not once, but two, three ...n times and by averaging the values so far obtained.

The invention consists in providing the machines which are already equipped with industrial weighing scales (static and dynamic machines for weight control,weight selecting machines, weight filling machines, weight distributing machines, etc...) of several weighing scales arranged in sequence, so that the same quantity is successively weighed by each scale; the weight values thus obtained are then averaged by means of a suitable computer which supplies the result of these averages for each weighed mass. To give an example, reference is made to the weighing machines for the automatic weighing control referred to by the metric law as "weight selecting machines".

Such machines are mainly composed of: a conveyor spacer of the objects to be weighed, of a industrial weighing scale, of an electronic system for detection and comparison with one or more acceptable preset values and of an output conveyor equipped with or without a device used for the separation of non-accepted objects.

The errors of the weighing scale are scattered within the region of uncertainty of the scale, the extent thereof acts as a function of three parameters: the weight of the object to be controlled, its shape and more precisely its length along the advancement direction of the object itself on the weighing plate and the speed with which it moves. The scattering of the errors (see fig. 1, curve 1) would be represented by a Gaussian curve if these errors were merely incidental; which in practice rarely occurs. The detection of numerous errors leads to the plotting of an histogram from which can be read a more or less distorted asymmetric Gaussian curve.

The value consists in three times the Mean Square Deviation or Standard Deviation and is indicated by the Arab letter "S" or the Greek " sigma " . This is legally defined as the weight selecting weighing machine precision (for a certain object with a precise working speed). That is to say, the + or - sigma amplitude contains half of the errors, while +3 sigma and -3 sigma amplitude contains their total number.

The legal definition of a weighing machine precision is derived from this statistically made assuption.

By way of example a weight selecting machine of the motorized plate type is illustrated: it is composed of a belt scale (1) (see fig.3) supporting the weighing plate (4), which consists of a small conveyor belt weigher (or chain) directly driven by a motor or by a gear motor (6).

Such a conveyor acts as a weighing plate and bears on the scale with a tare equal to the conveyor weight. It is preceded and followed by two input (2) and output (3) conveyors.

The errors made by the scale (1) which is subjected to the several weighings of the same object (5) are scattered along a curve (1) as shown in fig. 1.

This invention consists in inserting a second scale (1) (see fig. 4) in the system, so that the object (5) is weighed in succession by both industrial weighing scales.

Each of these industrial weighing scales creates a group of errors which, if taken individually, would form a curve (1) as in fig 1. If, however, the values of the readout of the first scale are from time to time memorized and averaged with those values provided by the second scale by a computer (7) (fig. 4) to which both scales are connected, the dispersion curve of errors assumes the configuration of curve No. 2 as shown in fig.1.

It should be noticed that curve 2 shows an average scatter of errors which is lower than that of curve 1. This leads to a reduction of the sigma 2 absolute value in curve 2 with respect to the sigma 1 absolute value in curve 1.

The above reduction of the STANDARD DEVIATION value is equal to approximately 30% and can be verified both theoretically and empirically.

The industrial result consists in an appreciable improvement to the precision of the weighing scale, regardless of its type.

The accuracy in weighing can be refined further as the number of scales arranged in sequence increases (fig. 5). The improvement can be applied to any weighing machine or industrial process which employs one or more weighing scales and will be increasingly useful as the precision of the process weighing scale reduces or as the mass to be weighed increases intrinsically in value.

Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included, for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the scope of each element identified by way of example by such reference signs.

This improvement is based on the well-known Gauss' theorem on repeated measurements and it is the Gaussian curve wich demonstrates the benefits provided on the precision of the weighing scale. This improvement to error reduction, obviously, can be applied to a three scale sequence, thus obtaining further reductions of Standard Deviation and relevant increases in precision.

Tis:Longxin's weight controllers can make the industrial weighing scales work more stability and security.

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Adam Equipment GBK 16a Check Weighing Scales $587.6 The GBK check weighing scales from Adam Equipment come standard with the features needed for a range of applications. Whether using them for warehouse production laboratory or office work the GBK offers parts counting check weighing percentage weighing modes. The easy to use functionality of the scale combined with its large backlit display makes weighing simple and the indicator can be mounted with or without the pillar for easy viewing and access. A large stainless steel top pan RS232 interface rechargeable battery and AC adapter round out the offering making the GBK your number one choice for quality and functionality. Features:. 5 weighing units (kg g lb oz lbs:oz). Automatic memory accumulation. Preset counting with alarm. Date and time. Adjustable filters. Full range tare. Internal counting resolution 1:400 000. Checkweighing with low and high limits. Check weighing LED bar graph. Capacity tracker. Large backlit LCD display. Overload protection. Nonslip adjustable leveling feet. Large stainless steel platform. Pillar mounted. Full color coded keypad with numeric entry. Precision load cell technology. Simple userfriendly operation. Splashproof to protect from accidental spills. Easy access to the rechargeable battery. RS232 bidirectional interface. External calibration. Rechargeable battery up to 90 hours operation. Auto sleep / power down function to save battery life. Low battery indication. AC Adapter. 2 year warranty. Applications:. Weighing. Parts counting. Percentage weighing. Animal/Dynamic weighing. Check weighing. Check counting. Models Available:. GBK 16a. 16lb x 0.0002lb Platform size 11.8 x 15.7 . GBK 35a. 35lb x 0.001lb Platform size 11.8 x 15.7 . GBK 70a. 70lb x 0.002lb Platform size 11.8 x 15.7 . GBK 130a. 130lb x 0.005lb Platform size 11.8 x 15.7 . GBK 260a. 260lb x 0.01lb Platform size 11.8 x 15.7 .

Adam Equipment GBK 35a Check Weighing Scales $483.6 The GBK check weighing scales from Adam Equipment come standard with the features needed for a range of applications. Whether using them for warehouse production laboratory or office work the GBK offers parts counting check weighing percentage weighing modes. The easy to use functionality of the scale combined with its large backlit display makes weighing simple and the indicator can be mounted with or without the pillar for easy viewing and access. A large stainless steel top pan RS232 interface rechargeable battery and AC adapter round out the offering making the GBK your number one choice for quality and functionality. Features:. 5 weighing units (kg g lb oz lbs:oz). Automatic memory accumulation. Preset counting with alarm. Date and time. Adjustable filters. Full range tare. Internal counting resolution 1:400 000. Checkweighing with low and high limits. Check weighing LED bar graph. Capacity tracker. Large backlit LCD display. Overload protection. Nonslip adjustable leveling feet. Large stainless steel platform. Pillar mounted. Full color coded keypad with numeric entry. Precision load cell technology. Simple userfriendly operation. Splashproof to protect from accidental spills. Easy access to the rechargeable battery. RS232 bidirectional interface. External calibration. Rechargeable battery up to 90 hours operation. Auto sleep / power down function to save battery life. Low battery indication. AC Adapter. 2 year warranty. Applications:. Weighing. Parts counting. Percentage weighing. Animal/Dynamic weighing. Check weighing. Check counting. Models Available:. GBK 16a. 16lb x 0.0002lb Platform size 11.8 x 15.7 . GBK 35a. 35lb x 0.001lb Platform size 11.8 x 15.7 . GBK 70a. 70lb x 0.002lb Platform size 11.8 x 15.7 . GBK 130a. 130lb x 0.005lb Platform size 11.8 x 15.7 . GBK 260a. 260lb x 0.01lb Platform size 11.8 x 15.7 .

Adam Equipment GBK 130a Check Weighing Scales $535.6 The GBK check weighing scales from Adam Equipment come standard with the features needed for a range of applications. Whether using them for warehouse production laboratory or office work the GBK offers parts counting check weighing percentage weighing modes. The easy to use functionality of the scale combined with its large backlit display makes weighing simple and the indicator can be mounted with or without the pillar for easy viewing and access. A large stainless steel top pan RS232 interface rechargeable battery and AC adapter round out the offering making the GBK your number one choice for quality and functionality. Features:. 5 weighing units (kg g lb oz lbs:oz). Automatic memory accumulation. Preset counting with alarm. Date and time. Adjustable filters. Full range tare. Internal counting resolution 1:400 000. Checkweighing with low and high limits. Check weighing LED bar graph. Capacity tracker. Large backlit LCD display. Overload protection. Nonslip adjustable leveling feet. Large stainless steel platform. Pillar mounted. Full color coded keypad with numeric entry. Precision load cell technology. Simple userfriendly operation. Splashproof to protect from accidental spills. Easy access to the rechargeable battery. RS232 bidirectional interface. External calibration. Rechargeable battery up to 90 hours operation. Auto sleep / power down function to save battery life. Low battery indication. AC Adapter. 2 year warranty. Applications:. Weighing. Parts counting. Percentage weighing. Animal/Dynamic weighing. Check weighing. Check counting. Models Available:. GBK 16a. 16lb x 0.0002lb Platform size 11.8 x 15.7 . GBK 35a. 35lb x 0.001lb Platform size 11.8 x 15.7 . GBK 70a. 70lb x 0.002lb Platform size 11.8 x 15.7 . GBK 130a. 130lb x 0.005lb Platform size 11.8 x 15.7 . GBK 260a. 260lb x 0.01lb Platform size 11.8 x 15.7 .

Adam Equipment GBK 260a Check Weighing Scales $701.56 The GBK check weighing scales from Adam Equipment come standard with the features needed for a range of applications. Whether using them for warehouse production laboratory or office work the GBK offers parts counting check weighing percentage weighing modes. The easy to use functionality of the scale combined with its large backlit display makes weighing simple and the indicator can be mounted with or without the pillar for easy viewing and access. A large stainless steel top pan RS232 interface rechargeable battery and AC adapter round out the offering making the GBK your number one choice for quality and functionality. Features:. 5 weighing units (kg g lb oz lbs:oz). Automatic memory accumulation. Preset counting with alarm. Date and time. Adjustable filters. Full range tare. Internal counting resolution 1:400 000. Checkweighing with low and high limits. Check weighing LED bar graph. Capacity tracker. Large backlit LCD display. Overload protection. Nonslip adjustable leveling feet. Large stainless steel platform. Pillar mounted. Full color coded keypad with numeric entry. Precision load cell technology. Simple userfriendly operation. Splashproof to protect from accidental spills. Easy access to the rechargeable battery. RS232 bidirectional interface. External calibration. Rechargeable battery up to 90 hours operation. Auto sleep / power down function to save battery life. Low battery indication. AC Adapter. 2 year warranty. Applications:. Weighing. Parts counting. Percentage weighing. Animal/Dynamic weighing. Check weighing. Check counting. Models Available:. GBK 16a. 16lb x 0.0002lb Platform size 11.8 x 15.7 . GBK 35a. 35lb x 0.001lb Platform size 11.8 x 15.7 . GBK 70a. 70lb x 0.002lb Platform size 11.8 x 15.7 . GBK 130a. 130lb x 0.005lb Platform size 11.8 x 15.7 . GBK 260a. 260lb x 0.01lb Platform size 11.8 x 15.7 .

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The World Market for Personal Weighing Machines, Baby Scales, and Household Scales $325 This report was created for strategic planners, international executives and import/export managers who are concerned with the market for weighing machinery and weight-operated counting and checking machines excluding balances of 5 cg or better and personal and household scales. With the globalization of this market, managers can no longer be contented with a local view. Nor can managers be contented with out-of-date statistics that appear several years after the fact. I have developed a methodology, based on macroeconomic and trade models, to estimate the market for weighing machinery and weight-operated counting and checking machines excluding balances of 5 cg or better and personal and household scales for those countries serving the world market via exports or supplying from various countries via imports. I do so for the current year based on a variety of key historical indicators and econometric models.

Handbook of Electronic Weighing $190 This book describes the fundamental principles of electronic weighing, beginning with the theoretical background of the basic components and continuing with the theoretical formulas to calculate the weighing accuracy in different applications, including the influence on accuracy of external disturbing forces. It also describes the layout and optimum composition of weighing systems for static weighing and batching, in-motion weighing, belt conveyor weighing and flow control, as well as counting and checkweighing scales. Complete technical specifications are included, which, supplemented with relevant technical data, can serve as masters for procurment of the equipment for twelve typical industrial weighing applications. Testing principles and procedures for test reports are detailed, covering all kinds of static weighing and batching systems, as well as belt conveyor scales and dosimeters. Written for practitioners, this book will give engineers and managers in the chemical, iron and steel, pulp and paper and other industries an awareness of the basic technology, an appreciation of the range of its application, and an understanding of the performance that can be expected.

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The World Market for Weighing Machinery, Weight-Operated Counting and Checking Machines, Weighing Machine Weights, and Their Parts $325 This report was created for strategic planners, international executives and import/export managers who are concerned with the market for personal weighing machines, baby scales, and household scales. With the globalization of this market, managers can no longer be contented with a local view. Nor can managers be contented with out-of-date statistics that appear several years after the fact. I have developed a methodology, based on macroeconomic and trade models, to estimate the market for personal weighing machines, baby scales, and household scales for those countries serving the world market via exports or supplying from various countries via imports. I do so for the current year based on a variety of key historical indicators and econometric models.

Weighing The Soul (Paperback) $23.2 Winner of the IgNobel Prize inphysics and the 2004 American Institute of Physics Science Writing Award, LenFisher showed just how much fun science can be in his enthusiastically praiseddebut, How to Dunk a Doughnut. Inthis new work, he reveals that science sometimes takes a path through theridiculous and the bizarre to discover that Nature often simply does not followcommon sense. One experiment, involving a bed,platform scales, and a dying man, seemed to prove that the soul weighed thesame as a slice of bread. But other, no less fanciful experiments and ideas ledto the fundamentals of our understanding of movement, heat, light, and energy,and such things as the discovery of electricity, and the structure of DNA;improved engines; and the invention of computers. As in his previous book,Fisher uses personal stories and examples from everyday life, as well as humor,to make the science accessible. He touches on topics from lightning to corsetsand from alchemy to Frankenstein and water babies, but he may not claim thelast word on the weight of the soul!

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Portable Hanging 15Kg/5g Mini Digital Weighing Scale(Red) $5.73 - The Digital Scales is the ideal way to track your weight loss quickly and easily - The LCD display allows for easy viewing even in the most dimly light areas of the outdoor - Digital Scales features advanced digital weighing technology that provides a high tech analysis of the user - Efficiency, energy saving, environmental protection - With high-precision weighing sensor - Overload, low-pressure tips, automatic shutdown - Selectable units of weight: g/kg/ib - Powered by 1 x CR2032 (not included) - Max Capacity: 15Kg - Resolution: 5g

Weighing Light: Poems by Brock, Geoffrey [Hardcover] $25.12 The fifth winner of the annual New Criterion Poetry Prize is Geoffrey Brocks Weighing Light. From the glinting scales in a painting by Vermeer to the white lines that disappear beneath a headlights beam, Mr. Brocks poems measure out the often elusive weights and distances of the known world, confronting the unruly powers that threaten his burnished surfaces. His acute observations of landscape and of the smallest gestures that pass between people give rise to affecting human dramas both stark and deeply felt. Once read, his keen perceptions all the more striking for the expertly cadenced music of his language and his supple use of poetic form will be long remembered. Author: Brock, Geoffrey Binding Type: Hardcover Number of Pages: 78 Publication Date: 2005/09/01 Language: English Dimensions: 8.56 x 5.94 x 0.53 inches

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Keenets Digital Fishing Weigh Scales. $24.99 Capacity - 25kg/50Ibs.Accurate electronic weighing scale.50lbs maximum weight.Liquid crystal display.Steel hook clips out of the way to stop it rattling during transportation.Size H26.5, W7, D2.8cm.Batteries required: 1 x 9V (included).