CN103115664A - Automatic calibration device for electronic balances - Google Patents

Automatic calibration device for electronic balances Download PDF

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Publication number
CN103115664A
CN103115664A CN2013100361344A CN201310036134A CN103115664A CN 103115664 A CN103115664 A CN 103115664A CN 2013100361344 A CN2013100361344 A CN 2013100361344A CN 201310036134 A CN201310036134 A CN 201310036134A CN 103115664 A CN103115664 A CN 103115664A
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CN
China
Prior art keywords
counterweight
electronic scales
frame
downside
sides
Prior art date
Application number
CN2013100361344A
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Chinese (zh)
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CN103115664B (en
Inventor
赵升吨
赵永强
范淑琴
刘辰
徐凡
郎倩
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西安交通大学
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Priority to CN201310036134.4A priority Critical patent/CN103115664B/en
Publication of CN103115664A publication Critical patent/CN103115664A/en
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Publication of CN103115664B publication Critical patent/CN103115664B/en

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Abstract

Disclosed is an automatic calibration device for electronic balances. By adopting the servo motor direct drive technique and a ball screw nut assembly, rated loading on the electronic balances is realized, weight accuracy and reliability are improved by means of fixed-mass weights, automatic zero setting and calibration of the electronic balances are realized, and labor intensity of operators is reduced. The automatic calibration device for the electronic balances has the advantages of stable weight, no impact, high weight accuracy, compact structure, convenience in use and maintenance, reliability in transmission and the like, is applicable to calibration and zero setting of the electronic balances in balance production enterprises, and can be used for quick detection and reinspection of the balances for the industrial and commercial management department.

Description

A kind of electronic scales automatic calibration device
Technical field
The invention belongs to automation equipment and equipment technical field, be specifically related to a kind of electronic scales automatic calibration device.
Background technology
Electronic scales is because weighing precision is high, convenient reading, the advantage such as accurate, and usable range is more and more extensive.In place weighing persons body weight such as family, hospital and gymnasiums, weighing food and material in the kitchen are in the market of farm produce, the place such as supermarket and warehouse goods of weighing can use electronic scales.Electronic scales all will be proofreaied and correct and be demarcated before factory dispatches from the factory, to guarantee measurement accuracy and the authority of electronic scales.
The scaling method of electronic scales is that electronic scales is placed on level table, placing articles not in the scale pan at first, and it is zero that the electronic scales reading is proofreaied and correct; Again a plurality of standard test weights are placed in successively on the electronic scales scale pan reading numerical values with the measuring and calculating error, and calibrate.The scaling method of using now have manually add counterweight and machinery the pneumatic counterweight dual mode that adds.Manually adding the counterweight mode is successively a plurality of counterweights to be placed on the scale pan by the operator, carries out reading, calibration, then takes off successively counterweight, repeats such simple motion labour intensity very large always.The pneumatic counterweight mode that adds of machinery is by a plurality of cylinder time-sharing operations, and a plurality of counterweights are loaded on the scale pan one by one, calibrates and returns to zero.By contrast, although it is simple to add by hand the mode action of counterweight, labour intensity is large; Although the pneumatic counterweight mode that adds of machinery greatly reduces labour intensity, in operating process, adds counterweight larger to the impact of electronic scales, noise is large, and the stated accuracy of scale is reduced; Demarcation to same electronic scales needs the multistep manual operation, frequent operation, and the frequency of utilization height of operating parts is fragile.
In order to reduce operator's labour intensity, increase simultaneously demarcation and the zero setting accuracy of electronic scales, use a Novel electronic scale caliberating device of servomotor control technology design extremely important.
Summary of the invention
In order to overcome the shortcoming of prior art, the object of the present invention is to provide a kind of electronic scales automatic calibration device, realize the robotization that electronic scales is demarcated, have load steadily, without impact, loading accuracy is high, compact conformation, working service is convenient, the advantages such as reliable transmission.
In order to achieve the above object, the present invention takes following technical scheme:
A kind of electronic scales automatic calibration device, comprise servomotor 1, the output shaft of servomotor 1 is connected with the input shaft of speed reduction unit 2, and the output shaft of speed reduction unit 2 is connected with ball-screw 3, nut 4 is connected on ball-screw 3, and ball-screw 3 is connected with joint flange 13 by bearing; Joint flange 13 is arranged on upper plate 5 by interference fit, counterweight frame 6 is connected on nut 4, the first counterweight 8, the second counterweight 81 and the 3rd counterweight 82 are placed on counterweight frame 6 from bottom to up successively, backing plate 10 be placed on lower shoe 11 above, electronic scales 9 be placed on backing plate 10 above; Upper plate 5, lower shoe 11 and two columns 7 connect into a flame framework; Guide pillar 12 passes counterweight frame 6 tops and is arranged on joint flange 13; Travel switch 14 is arranged on the downside of upper plate 5, and between the upper end face of the downside of upper plate 5 and nut 4.
Described counterweight frame 6 is frame character form structures, and Open Side Down for the frame font, and each is separated out three seamed edges by three rectangular openings the both sides of counterweight frame 6, and the first upper side 6A of three seamed edges, the second upper side 6B, the 3rd upper side 6C are parallel to each other; Interval between the first upper side 6A and the second upper side 6B equals the convex surface 8F of maximal clearance and the second counterweight 81 between the bottom surface 8D of the end face 8E of the first counterweight 8 and the second counterweight 81 and bottom surface 8D apart from sum; Interval between the second upper side 6B and the 3rd upper side 6C equals the convex surface 8F of maximal clearance and the 3rd counterweight 82 between the bottom surface 8D of the end face 8E of the second counterweight 81 and the 3rd counterweight 82 and bottom surface 8D apart from sum.
The structure of described the first counterweight 8, the second counterweight 81, the 3rd counterweight 82 is identical, is convex shape; Each counterweight upside projection, downside is recessed; The pitch angle of two the first side 8B of counterweight upside projection and recessed two the second side 8A of downside is equal, and the distance between two the first side 8B of upside projection is larger than the distance between two recessed the second side 8A of downside; Respectively there are two projections the both sides of the first counterweight 8, the second counterweight 81 and the 3rd counterweight 82, and the lower surface 8C of four projections of each counterweight is in the same plane.
The flat board that described backing plate 10 is 5mm and 10mm by one group of thickness forms, the thickness Selection and Constitute of the number of backing plate 10 and thickness selective basis electronic scales 9.
The present invention adopts servomotor as prime mover, as gear train, realizes the zeroing of electronic scales and the automation mechanized operation of demarcation with ball guide screw nat.Adopt high-precision definite value counterweight to carry out servo loading, eliminated in traditional mechanical calibrating the impact to electronic scales, increased the precision of zeroing and the demarcation of electronic scales, utilize the servomotor control technology to reduce operator's labour intensity, this device have load steadily, without impact, loading accuracy is high, compact conformation, working service is convenient, the advantages such as reliable transmission, be fit to weighing apparatus manufacturer and electronic scales demarcated and returned to zero, also be applicable to industrial and commercial administration department to fast detecting and the reinspection of weighing apparatus.
Description of drawings
Fig. 1 is the schematic diagram that once loads of the present invention.
Fig. 2 is that secondary of the present invention loads schematic diagram.
Fig. 3 is three loading schematic diagram of the present invention.
Fig. 4 is counterweight shelf structure schematic diagram of the present invention.
Fig. 5 is counterweight structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
With reference to Fig. 1, Fig. 2 and Fig. 3, a kind of electronic scales automatic calibration device, comprise a servomotor 1, the output shaft of servomotor 1 directly is connected with the input shaft of speed reduction unit 2, the output shaft of speed reduction unit 2 is connected with ball-screw 3, nut 4 is connected on ball-screw 3, and ball-screw 3 is connected with joint flange 13 by bearing; Joint flange 13 is arranged on upper plate 5 by interference fit, counterweight frame 6 is connected on nut 4, the first counterweight 8, the second counterweight 81 and the 3rd counterweight 82 are placed on counterweight frame 6 from bottom to up successively, backing plate 10 be placed on lower shoe 11 above, electronic scales 9 be placed on backing plate 10 above; Upper plate 5, lower shoe 11 and two columns 7 connect into into a flame framework; Guide pillar 12 passes counterweight frame 6 tops and is arranged on joint flange 13; Travel switch 14 is arranged on the downside of upper plate 5, and between the upper end face of the downside of upper plate 5 and nut 4.
The initial position setting of this device comprises two aspects:
The one, electronic scales 9 is placed on above backing plate 10, when starting servomotor 1 for the first time, servomotor 1 drives ball-screw 3 by speed reduction unit 2 and rotates, ball-screw 3 drives nut 4 and moves up along guide pillar 12, when nut 4 is encountered travel switch 14 to adjusting the zero-bit of servomotor 1, the initial position of the servomotor 1 that the servo controller automatic Memory is current.
The 2nd, according to the thickness of electronic scales 9, select the combination of suitable backing plate 10, make the scale pan face of electronic scales 9 reach fixing initial position, fixedly initial position is determined when structural design.
as shown in Figure 1, the loading procedure of the first counterweight 8 is: servomotor 1 is by reductor 2 and ball-screw 3, nut 4 drives counterweight frame 6 and moves down, the bottom surface 8D of the first counterweight 8 is contacted with the scale pan face of electronic scales 9, the first upper side 6A of the lower surface 8C of 8 four projections of the first counterweight and counterweight frame 6 throws off, the lower surface 8C of 81 4 projections of the second counterweight contacts with the second upper side 6B of counterweight frame 6, the lower surface 8C of 82 4 projections of the 3rd counterweight contacts with the 3rd upper side 6C of counterweight frame 6, namely the first counterweight 8 is placed on the scale pan face of electronic scales 9, the second counterweight 81 and the 3rd counterweight 82 still hang on counterweight frame 6.
as shown in Figure 2, the loading procedure of the second counterweight 81 is: on the basis that the first counterweight 8 loads, servomotor 1 is by reductor 2 and ball-screw 3, nut 4 drives counterweight frame 6 to be continued to move down, two the first side 8B of recessed two the second side 8A of the second counterweight 81 downsides and the first counterweight 8 upside projections are contacted, the second upper side 6B of the lower surface 8C of 81 4 projections of the second counterweight and counterweight frame 6 throws off, the lower surface 8C of 82 4 projections of the 3rd counterweight contacts with the 3rd upper side 6C of counterweight frame 6, namely the second counterweight 81 is loaded on the scale pan face of electronic scales 9, the 3rd counterweight 82 still hangs on counterweight frame 6.
As shown in Figure 3, the loading procedure of the 3rd counterweight 82 is: on the basis of the first counterweight 8 and the second counterweight 81 loadings, servomotor 1 drives counterweight frame 6 by reductor 2 and ball-screw 3, nut 4 to be continued to move down, two recessed the second side 8A of the 3rd counterweight 82 downsides are contacted with two the first side 8B of the second counterweight 81 upside projections, the 3rd upper side 6C of the lower surface 8C of 82 4 projections of the 3rd counterweight and counterweight frame 6 throws off, and namely the 3rd counterweight 82 is loaded on the scale pan face of electronic scales 9.
As shown in Figure 4, described counterweight frame 6 is frame character form structures, Open Side Down for the frame font, each is separated out three seamed edges by three rectangular openings the both sides of counterweight frame 6, the first upper side 6A of three seamed edges, the second upper side 6B, the 3rd upper side 6C are parallel to each other, and the interval between the first upper side 6A and the second upper side 6B equals the convex surface 8F of maximal clearance and the second counterweight 81 between the bottom surface 8D of the end face 8E of the first counterweight 8 and the second counterweight 81 and bottom surface 8D apart from sum; Interval between the second upper side 6B and the 3rd upper side 6C equals the convex surface 8F of maximal clearance and the 3rd counterweight 82 between the bottom surface 8D of the end face 8E of the second counterweight 81 and the 3rd counterweight 82 and bottom surface 8D apart from sum.
As shown in Figure 5, the structure of described the first counterweight 8, the second counterweight 81, the 3rd counterweight 82 is identical, is convex shape; Each counterweight upside projection, downside is recessed; Make the bottom surface distribution area of the first counterweight 8 large, and actual surface of contact is little, is beneficial to counterweight to keep steady; The pitch angle of two the first side 8B of counterweight upside projection and recessed two the second side 8A of downside is equal, and the distance L 2 between two the first side 8B of upside projection is larger than the distance L 1 between two recessed the second side 8A of downside; When the second counterweight 81 falls, recessed two the first side 8B of two the second side 8A and the first counterweight 8 upside projections of the second counterweight 81 downsides contact, the bottom surface 8D of the second counterweight 81 does not contact with the end face 8E of the first counterweight 8, be beneficial to the centering of the second counterweight 81 and the first counterweight 8, more steady when falling simultaneously.Respectively there are two projections the both sides of the first counterweight 8, the second counterweight 81 and the 3rd counterweight 82, four projections of each counterweight are used for counterweight and are connected connection with the counterweight frame, the lower surface 8C of four projections of each counterweight is in the same plane, and when being beneficial to 6 rising of counterweight frame, the counterweight of picking-up is in level always.
The flat board that described backing plate 10 is 5mm and 10mm by one group of thickness forms, the thickness Selection and Constitute of the number of backing plate 10 and thickness selective basis electronic scales 9.
Principle of work of the present invention is:
Adopt servomotor 1 and speed reduction unit 2 accurately to control the corner of ball-screw 3, the nut 4 of realizing being connected with ball-screw 3 is along guide pillar 12 straight line slippages, and the nut 4 of straight line slippage is with the accurate movement of the counterweight frame 6 on it that is dynamically connected; Thereby the first counterweight 8, the second counterweight 81 and the 3rd counterweight 82 are placed on the scale pan of electronic scales 9 in turn, by reading and the calibration of the direct read electric scale of operative employee.In this process, driver by servomotor 1 and controller are realized putting down in turn and lifting of the first counterweight 8, the second counterweight 81, the 3rd counterweight 82, the operator only need complete putting into, taking out of electronic scales 9, reads the registration of scale, realizes the robotization of operation.

Claims (4)

1. electronic scales automatic calibration device, it is characterized in that: comprise servomotor (1), the output shaft of servomotor (1) directly is connected with the input shaft of speed reduction unit (2), the output shaft of speed reduction unit (2) is connected with ball-screw (3), nut (4) is connected on ball-screw (3), and ball-screw (3) is connected with joint flange (13) by bearing; Joint flange (13) is arranged on upper plate (5) by interference fit, counterweight frame (6) is connected on nut (4), the first counterweight (8), the second counterweight (81) and the 3rd counterweight (82) are placed on counterweight frame (6) from bottom to up successively, backing plate (10) be placed on lower shoe (11) above, electronic scales (9) be placed on backing plate (10) above; Upper plate (5), lower shoe (11) and two columns (7) connect into a flame framework; Guide pillar (12) passes counterweight frame (6) top and is arranged on joint flange (13); Travel switch (14) is arranged on the downside of upper plate (5), and is positioned between the upper end face of the downside of upper plate (5) and nut (4).
2. a kind of electronic scales automatic calibration device according to claim 1, it is characterized in that: described counterweight frame (6) is a frame character form structure, Open Side Down for the frame font, each is separated out three seamed edges by three rectangular openings the both sides of counterweight frame (6), first upper side (6A) of three seamed edges, the second upper side (6B), the 3rd upper side (6C) is parallel to each other, interval between the first upper side (6A) and the second upper side (6B) equals the convex surface (8F) of maximal clearance and the second counterweight (81) between the bottom surface (8D) of the end face (8E) of the first counterweight (8) and the second counterweight (81) and bottom surface (8D) apart from sum, interval between the second upper side (6B) and the 3rd upper side (6C) equals the convex surface (8F) of maximal clearance and the 3rd counterweight (82) between the bottom surface (8D) of the end face (8E) of the second counterweight (81) and the 3rd counterweight (82) and bottom surface (8D) apart from sum.
3. a kind of electronic scales automatic calibration device according to claim 1, it is characterized in that: the structure of described the first counterweight (8), the second counterweight (81), the 3rd counterweight (82) is identical, is convex shape; Each counterweight upside projection, downside is recessed; The pitch angle of counterweight upside projection two the first sides (8B) and recessed two the second sides of downside (8A) is equal, and the distance between two first sides (8B) of upside projection is larger than the distance between downside recessed two the second sides (8A); Respectively there are two projections the both sides of the first counterweight (8), the second counterweight (81) and the 3rd counterweight (82), and the lower surface (8C) of four projections of each counterweight is in the same plane.
4. a kind of electronic scales automatic calibration device according to claim 1, it is characterized in that: the flat board that described backing plate (10) is 5mm and 10mm by one group of thickness forms, the thickness Selection and Constitute of the number of backing plate (10) and thickness selective basis electronic scales (9).
CN201310036134.4A 2013-01-30 2013-01-30 Automatic calibration device for electronic balances CN103115664B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104019937A (en) * 2014-05-27 2014-09-03 大连工业大学 Sequential weight adding device
CN104655256A (en) * 2015-02-10 2015-05-27 上海市计量测试技术研究院 Multi-layer scale and weight bearing disk combination
CN106197644A (en) * 2016-08-29 2016-12-07 中国计量科学研究院 A kind of big apparatus for measuring quality with groove interconnection counterweight selecting technology
CN106248192A (en) * 2016-08-29 2016-12-21 中国计量科学研究院 The big apparatus for measuring quality that a kind of light refraction method and determining displacement method are mutually authenticated
CN106289493A (en) * 2016-08-29 2017-01-04 中国计量科学研究院 A kind of big apparatus for measuring quality of high accuracy
CN109632183A (en) * 2019-01-22 2019-04-16 北京邮电大学 A kind of pressure sensor calibrating experimental provision based on worm and gear

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CN101706344A (en) * 2009-07-08 2010-05-12 中国测试技术研究院 Independent weight adding force standard machine and independent weight adding method
CN101832811A (en) * 2009-06-19 2010-09-15 中国计量科学研究院 Weighter-type automatic evaluation loading system
CN203069260U (en) * 2013-01-30 2013-07-17 西安交通大学 Electronic balance calibration device

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RO119214B1 (en) * 1997-03-11 2004-05-28 Aurel Filoteanu Mass/force generator, having the capacity of signalling the charging yoke touching
KR20040087348A (en) * 2003-04-07 2004-10-14 한국표준과학연구원 Automatic weighing system for standard weight set
CN201203473Y (en) * 2008-06-03 2009-03-04 山东省计量科学研究院 Dead weight / lever dual-purpose type force standard plane
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104019937A (en) * 2014-05-27 2014-09-03 大连工业大学 Sequential weight adding device
CN104019937B (en) * 2014-05-27 2016-05-11 大连工业大学 The order device of raising the price
CN104655256A (en) * 2015-02-10 2015-05-27 上海市计量测试技术研究院 Multi-layer scale and weight bearing disk combination
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CN106197644A (en) * 2016-08-29 2016-12-07 中国计量科学研究院 A kind of big apparatus for measuring quality with groove interconnection counterweight selecting technology
CN106248192A (en) * 2016-08-29 2016-12-21 中国计量科学研究院 The big apparatus for measuring quality that a kind of light refraction method and determining displacement method are mutually authenticated
CN106289493A (en) * 2016-08-29 2017-01-04 中国计量科学研究院 A kind of big apparatus for measuring quality of high accuracy
CN106197644B (en) * 2016-08-29 2018-10-09 中国计量科学研究院 A kind of big apparatus for measuring quality with groove interconnection counterweight selecting technology
CN106248192B (en) * 2016-08-29 2018-10-09 中国计量科学研究院 A kind of big apparatus for measuring quality that light refraction method is mutually authenticated with determining displacement method
CN106289493B (en) * 2016-08-29 2018-10-26 中国计量科学研究院 A kind of big apparatus for measuring quality of high accuracy
CN109632183A (en) * 2019-01-22 2019-04-16 北京邮电大学 A kind of pressure sensor calibrating experimental provision based on worm and gear
CN109632183B (en) * 2019-01-22 2020-06-26 北京邮电大学 Pressure sensor calibration experimental device based on worm gear

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