CN102798454A - Miniature electronic balance - Google Patents
Miniature electronic balance Download PDFInfo
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- CN102798454A CN102798454A CN2012102870698A CN201210287069A CN102798454A CN 102798454 A CN102798454 A CN 102798454A CN 2012102870698 A CN2012102870698 A CN 2012102870698A CN 201210287069 A CN201210287069 A CN 201210287069A CN 102798454 A CN102798454 A CN 102798454A
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- amplification circuit
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Abstract
The invention discloses a miniature electronic balance, which comprises an MCU (Micro-programmed Control Unit), a weighing sensor, a preamplification circuit, an A/D (Analog to Digital) converter, a keying circuit, a voice circuit, a liquid crystal display and a power supply, wherein a communication connection is established between the weighing sensor and the preamplification circuit as well as between the preamplification circuit and the A/D converter; and the MCU is respectively connected with the A/D converter, the keying circuit, the voice circuit and the liquid crystal display in a controlling manner. The disclosed miniature electronic balance achieves a small size and a simple structure, has the excellent performances of small measuring error and good stability, achieves the functions of supernumerary weight removal, unit conversion, accumulated weighing and overload alarming prompt at the same time, can be put in a pocket, and is especially suitable for field operation or sample weighing work in distant places.
Description
Technical field
The present invention relates to a kind of balance, be specifically related to a kind of mini electronic balance, belong to field of measuring techniques.
Background technology
Along with electronic technology and micro-computer technology develop rapidly, and be applied to the balance field, electronic balance occurred.From last century the seventies first electronic balance appears in the world latter stage, in short thirties years, develop and all size, series electronic balance covering extensive fields, be widely used in all trades and professions mass metrology.Electronic balance has the incomparable advantage of mechanical balance.It can numeral shows, directly reading, weighing fast, easy and simple to handle, antijamming capability is strong; And it is intelligent, multi-functional to have adopted microcomputer technology to make; Can carry out on-line measurement with printer, computing machine are mutually online; Make data statistic analysis etc. become possibility, so range of application more and more widely.
Along with the continuous progress of science and technology, people are also increasingly high to the requirement of electronic balance.At present,, still come with some shortcomings in some aspects though most of electronic balances that people use have many advantages, excessive such as volume, carry inconvenience, particularly give and carry out the weigh people of operation of field for a long time and brought very big inconvenience; And for example lack the overload prompt facility, balance is in overload for a long time very easily to be damaged; Can only once weigh, it is very much unfavorable need accumulating the object of weighing for some.
Summary of the invention
To the demand; The invention provides a kind of mini electronic balance, this balance advantages of small volume, simple in structure; Have that measuring error is little, the premium properties of good stability; Have peeling weight, unit conversion, accumulative total is weighed and overload-alarm is pointed out function simultaneously, can empocket, be particularly suitable for the sample weighing work in field work or outlying area.
The present invention is a kind of mini electronic balance; This balance is made up of MCU microprocessor, LOAD CELLS, pre-amplification circuit, A/D converter, key circuit, sound circuit, LCD and power supply; Described LOAD CELLS and pre-amplification circuit establish a communications link; Described pre-amplification circuit and A/D converter establish a communications link, and described MCU microprocessor is control linkage A/D converter, key circuit, sound circuit and LCD respectively.
In the present invention's one preferred embodiment; Described LOAD CELLS adopts resistance strain type sensor; Its maximum range is 150g, and this resistance strain type sensor is made up of resistance strain gage, testing circuit and elastic body, when balance is weighed; This LOAD CELLS is directly stressed, and converts the weight of testee to corresponding electric signal and send pre-amplification circuit again to.
In the present invention's one preferred embodiment; Described pre-amplification circuit is made up of the operational amplifier and the RC network of two low drifts; The electric signal that this pre-amplification circuit is sent LOAD CELLS here is through amplifying, after the Filtering Processing, being sent to the input end of A/D converter again.
In the present invention's one preferred embodiment; Described A/D converter is 16 a sigma-delta analog-to-digital conversion module; This A/D converter adopts oversampling technique that signal is sampled, and carries out filtering through digital filter then and obtains final transformation result, and its maximum over-sampling rate is 1024.
In the present invention's one preferred embodiment, described MCU microprocessor adopts the 80C51 single-chip microcomputer, can accomplish following operation through C Programming with Pascal Language design software program: 1) transformation result of A/D converter is handled back liquor charging crystal display and show; 2) when being claimed the maximum range of weight of heavy, drive sound circuit and send chimes of doom greater than LOAD CELLS; 3) be connected with the key circuit interface, carry out the operation that zero clearing, peeling weight, unit conversion and accumulative total are weighed through key circuit.
The present invention has disclosed a kind of mini electronic balance; This balance advantages of small volume; Simple in structure, have that measuring error is little, the premium properties of good stability, have peeling weight, unit conversion, accumulative total is weighed and overload-alarm is pointed out function simultaneously; Can empocket, be particularly suitable for the sample weighing work in field work or outlying area.
Description of drawings
Fig. 1 is the composition structured flowchart of the mini electronic balance of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is set forth in detail, thereby protection scope of the present invention is made more explicit defining so that advantage of the present invention and characteristic can be easier to it will be appreciated by those skilled in the art that.
Fig. 1 is the composition structured flowchart of the mini electronic balance of the embodiment of the invention; This balance is made up of MCU microprocessor, LOAD CELLS, pre-amplification circuit, A/D converter, key circuit, sound circuit, LCD and power supply; Described LOAD CELLS and pre-amplification circuit establish a communications link; Described pre-amplification circuit and A/D converter establish a communications link, and described MCU microprocessor is control linkage A/D converter, key circuit, sound circuit and LCD respectively.
The mini electronic balance that the present invention mentions adopts the 80C51 single-chip microcomputer as the MCU microprocessor, and this type preparation implement has functional structure maturation, advantages such as speed is fast, antijamming capability is strong, stable and reliable operation; LOAD CELLS is the heart of electronic balance, and its effect is that the weight with testee converts corresponding electric signal to, and this LOAD CELLS adopts resistance strain type sensor, and its maximum range is 150g, is made up of resistance strain gage, testing circuit and elastic body; Electric signal after LOAD CELLS will be changed sends pre-amplification circuit to; This pre-amplification circuit is made up of the operational amplifier and the RC network of two low drifts; Ability with stronger inhibition zero point drift; The electric signal that pre-amplification circuit is sent LOAD CELLS here is sent to the input end of A/D converter again through amplifying, after the Filtering Processing, obtaining stable measuring-signal; A/D converter is 16 a sigma-delta analog-to-digital conversion module; This A/D converter adopts oversampling technique that the signal that sends is sampled, and carries out filtering through digital filter then and obtains final transformation result, send single-chip microcomputer to handle transformation result again; Its maximum over-sampling rate is 1024
The MCU microprocessor of this mini electronic balance is realized Based Intelligent Control through C Programming with Pascal Language design software program, and its control procedure is following: 1) transformation result of A/D converter is handled back liquor charging crystal display and show; 2) when being claimed the maximum range of weight of heavy, drive sound circuit and send chimes of doom greater than LOAD CELLS; 3) be connected with the key circuit interface, carry out the operation that zero clearing, peeling weight, unit conversion and accumulative total are weighed through key circuit.Wherein, LCD MODULE has adopted storage unit and display unit display mode one to one; The interface of this LCD and single-chip microcomputer is a serial mode; Form by a data lines and reading writing signal line, will light or extinguish respective display unit, operate very simple as long as write 1 or 0 in corresponding storage unit.
This mini electronic balance is easy to carry, can be by a joint 9V powered battery, inside keeps Ni-Cd battery charger, therefore uses all easily in a lot of occasions, its maximum range is 150g, when weight less than 15 g
The time, maximum error is less than 0.02 g, and when weight during at 15 g～100 g, maximum error is less than 0.05 g;
The method that this balance adopts repeatedly measurement to average is exported the demonstration weight of heavy, can reduce personal error effectively like this, obtains reliable weight of object.Generally speaking, the weighing result of this mini electronic balance has pinpoint accuracy and high stability, and power consumption simultaneously is low, function is many, cost is little, and very big practical value is arranged.
The present invention has disclosed a kind of mini electronic balance; This balance advantages of small volume; Simple in structure, have that measuring error is little, the premium properties of good stability, have peeling weight, unit conversion, accumulative total is weighed and overload-alarm is pointed out function simultaneously; Can empocket, be particularly suitable for the sample weighing work in field work or outlying area.
The above; Be merely embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any those of ordinary skill in the art are in the technical scope that the present invention disclosed, and variation or the replacement that can expect without creative work all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (5)
1. mini electronic balance; It is characterized in that; This balance is made up of MCU microprocessor, LOAD CELLS, pre-amplification circuit, A/D converter, key circuit, sound circuit, LCD and power supply; Described LOAD CELLS and pre-amplification circuit establish a communications link, and described pre-amplification circuit and A/D converter establish a communications link, and described MCU microprocessor is control linkage A/D converter, key circuit, sound circuit and LCD respectively.
2. mini electronic balance according to claim 1; It is characterized in that described LOAD CELLS adopts resistance strain type sensor, its maximum range is 150g; This resistance strain type sensor is made up of resistance strain gage, testing circuit and elastic body; When balance was weighed, this LOAD CELLS was directly stressed, and converted the weight of testee to corresponding electric signal and send pre-amplification circuit again to.
3. mini electronic balance according to claim 1; It is characterized in that; Described pre-amplification circuit is made up of the operational amplifier and the RC network of two low drifts; The electric signal that this pre-amplification circuit is sent LOAD CELLS here is through amplifying, after the Filtering Processing, being sent to the input end of A/D converter again.
4. mini electronic balance according to claim 1; It is characterized in that; Described A/D converter is 16 a sigma-delta analog-to-digital conversion module; This A/D converter adopts oversampling technique that signal is sampled, and carries out filtering through digital filter then and obtains final transformation result, and its maximum over-sampling rate is 1024.
5. mini electronic balance according to claim 1; It is characterized in that; Described MCU microprocessor adopts the 80C51 single-chip microcomputer, can accomplish following operation through C Programming with Pascal Language design software program: 1) transformation result of A/D converter is handled back liquor charging crystal display and show; 2) when being claimed the maximum range of weight of heavy, drive sound circuit and send chimes of doom greater than LOAD CELLS; 3) be connected with the key circuit interface, carry out the operation that zero clearing, peeling weight, unit conversion and accumulative total are weighed through key circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102870698A CN102798454A (en) | 2012-08-14 | 2012-08-14 | Miniature electronic balance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102870698A CN102798454A (en) | 2012-08-14 | 2012-08-14 | Miniature electronic balance |
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| CN102798454A true CN102798454A (en) | 2012-11-28 |
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| CN2012102870698A Pending CN102798454A (en) | 2012-08-14 | 2012-08-14 | Miniature electronic balance |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063283A (en) * | 2013-01-02 | 2013-04-24 | 管存忠 | Electronic scale |
| CN104483877A (en) * | 2014-12-08 | 2015-04-01 | 蚌埠天光传感器有限公司 | Analog input digital type force measurement indicator |
| CN105486392A (en) * | 2016-01-20 | 2016-04-13 | 常熟理工学院 | Small electronic weighing system based on single-chip microcomputer |
| CN105973445A (en) * | 2016-07-01 | 2016-09-28 | 韦庆克 | Intelligent electronic scale system based on cloud service |
| CN105973354A (en) * | 2016-07-01 | 2016-09-28 | 韦庆克 | Intelligent electronic scale system |
| CN106052830A (en) * | 2016-08-17 | 2016-10-26 | 合肥耀贝软件开发有限公司 | High-precision electronic scale based on AVR single-chip microcomputer |
| CN106092281A (en) * | 2016-07-01 | 2016-11-09 | 韦庆克 | A kind of intelligent electronic-scale system |
| CN106092282A (en) * | 2016-07-01 | 2016-11-09 | 韦庆克 | A kind of intelligent electronic-scale system |
| CN106124023A (en) * | 2016-07-01 | 2016-11-16 | 韦庆克 | A kind of intelligent electronic-scale system based on cloud service |
| CN106228624A (en) * | 2016-07-21 | 2016-12-14 | 曹蕊 | A kind of ETC system preventing antenna failure |
| CN107631787A (en) * | 2016-07-18 | 2018-01-26 | 长沙闽壹湖电子科技有限责任公司 | A kind of SCM Based electronic scale |
| CN107870025A (en) * | 2017-12-12 | 2018-04-03 | 江苏新安电器有限公司 | The washing machine for detection function of being weighed with strain |
| CN109238410A (en) * | 2018-09-06 | 2019-01-18 | 芜湖职业技术学院 | A kind of high-precision electronic weighing device |
| CN109724683A (en) * | 2019-01-09 | 2019-05-07 | 盈奇科技（深圳）有限公司 | A kind of system and method improving gravity sensing precision |
| CN110879097A (en) * | 2019-10-18 | 2020-03-13 | 南京信息工程大学滨江学院 | Portable scale and calibration method and measurement method thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063283A (en) * | 2013-01-02 | 2013-04-24 | 管存忠 | Electronic scale |
| CN104483877A (en) * | 2014-12-08 | 2015-04-01 | 蚌埠天光传感器有限公司 | Analog input digital type force measurement indicator |
| CN105486392A (en) * | 2016-01-20 | 2016-04-13 | 常熟理工学院 | Small electronic weighing system based on single-chip microcomputer |
| CN106124023A (en) * | 2016-07-01 | 2016-11-16 | 韦庆克 | A kind of intelligent electronic-scale system based on cloud service |
| CN105973354A (en) * | 2016-07-01 | 2016-09-28 | 韦庆克 | Intelligent electronic scale system |
| CN106092281A (en) * | 2016-07-01 | 2016-11-09 | 韦庆克 | A kind of intelligent electronic-scale system |
| CN106092282A (en) * | 2016-07-01 | 2016-11-09 | 韦庆克 | A kind of intelligent electronic-scale system |
| CN105973445A (en) * | 2016-07-01 | 2016-09-28 | 韦庆克 | Intelligent electronic scale system based on cloud service |
| CN107631787A (en) * | 2016-07-18 | 2018-01-26 | 长沙闽壹湖电子科技有限责任公司 | A kind of SCM Based electronic scale |
| CN106228624A (en) * | 2016-07-21 | 2016-12-14 | 曹蕊 | A kind of ETC system preventing antenna failure |
| CN106228624B (en) * | 2016-07-21 | 2019-08-16 | 深圳成谷科技有限公司 | A kind of ETC system for preventing antenna failure |
| CN106052830A (en) * | 2016-08-17 | 2016-10-26 | 合肥耀贝软件开发有限公司 | High-precision electronic scale based on AVR single-chip microcomputer |
| CN107870025A (en) * | 2017-12-12 | 2018-04-03 | 江苏新安电器有限公司 | The washing machine for detection function of being weighed with strain |
| CN109238410A (en) * | 2018-09-06 | 2019-01-18 | 芜湖职业技术学院 | A kind of high-precision electronic weighing device |
| CN109724683A (en) * | 2019-01-09 | 2019-05-07 | 盈奇科技（深圳）有限公司 | A kind of system and method improving gravity sensing precision |
| CN110879097A (en) * | 2019-10-18 | 2020-03-13 | 南京信息工程大学滨江学院 | Portable scale and calibration method and measurement method thereof |
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Application publication date: 20121128 |