CN1015131B - Electronic balance - Google Patents
Electronic balanceInfo
- Publication number
- CN1015131B CN1015131B CN 85108471 CN85108471A CN1015131B CN 1015131 B CN1015131 B CN 1015131B CN 85108471 CN85108471 CN 85108471 CN 85108471 A CN85108471 A CN 85108471A CN 1015131 B CN1015131 B CN 1015131B
- Authority
- CN
- China
- Prior art keywords
- correction
- output
- curve
- mass
- quality
- 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
- 238000012937 correction Methods 0.000 claims abstract description 89
- 238000005303 weighing Methods 0.000 claims abstract description 28
- 238000012360 testing method Methods 0.000 claims description 34
- 230000005055 memory storage Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000004069 differentiation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Measurement Of Force In General (AREA)
Abstract
The present invention relates to the measuring range correction of an electronic balance. An output and quality curve is obtained and is stored according to the output of a load weight detecting part under the conditions of no load, load of weighing values and presetting load of correction quality which is less than 1/2 of weighing values. The correction quality is loaded to the load weight detecting part, a display value becomes the correction quality at the moment, correction coefficients for correcting the curve inclination are calculated and are stored, and then, the measuring range correction is carried out by the refreshed and stored correction coefficients. When various kinds of correction quality are selected for carrying out the measuring range correction, a device is arranged and is used for judging which kind of the correction quality is loaded to the load weight detecting part. When the correction quality is less than 1/2 of weighing values, the non-error correction can be carried out.
Description
The present invention relates to electronic balance.
Usually, electronic balance is the power that produces by the acceleration of gravity that acts on test portion, with electromagnetic force in addition balance or the vibration number variation etc. that is replaced as elastomeric STRESS VARIATION and vibration string detect, again this detected value is converted into quality and shows.Therefore,, just can not express correct quality when change is provided with the place and acceleration of gravity when changing, thus must update coefficients in order to convert, promptly carry out so-called span and proofread and correct.In addition, employed electronic unit also has temperature dependency and variation characteristic year after year, and precision is high more, is necessary to carry out frequent span more and proofreaies and correct.
The span correction method is that the standard quality counterweight is placed on the scale pan, and the displayed value when making this is consistent with the counterweight quality, adjusts potentiometer or gives built-in span correction program earlier, becomes the span correcting mode, utilizes and places standard test weight, can carry out reduction coefficient and upgrade.
As mentioned above, utilize to place test portion detect the output of afterburning test section, should carry out linear process and adjustment for the size of power, but not exclusively be linear.Thereby, in electronic balance span is in the past proofreaied and correct, because the linear error of test section, as shown in Figure 4, when adopting light weight correcting, can draw the correction straight line of straight line B from original due correction straight line A disengaging, so that near the weighing value, enlarge error.So, in electronic balance in the past, normally adopt the correction loading close to proofread and correct with this electronic balance scale value.For in so that the balance of big weighing, then need the correcting-weight of several Kg and even hundreds of Kg, all be a problem on the expense and in the operation.
The present invention is according to the problems referred to above developments, and its purpose is to utilize the correction mass less than weighing value 1/2 that gives choosing to carry out error free span and proofreaies and correct, thus provide a kind of can be with the electronic balance that carries out the span correction than the light a lot of counterweight of weighing value.
In addition, other purpose is, in giving selected earlier multiple correction mass, utilize any correction mass of load to judge that automatically any correction mass carries out span and proofreaies and correct, provide a kind of and can correction mass be measured near the electronic balance of freely selecting the weighing value on the lenient side by user of service's intention.
With formation of the present invention, be illustrated according to the functional-block diagram of Figure 1 and Figure 2.
At first, in Fig. 1, the output of loading test section is corresponding to the electric signal of loading on the scale pan.The memory storage of curve of output must be stored when zero load, during the weighing duty value of this balance and give the loading test section output-figure-of-merit curve of putting the loading test section output calculation of asking when loading less than weighing value 1/2 correction mass at least.The correction factor calculation device is output and this correction mass of the loading test section when above-mentioned correction mass is loaded by loading test section branch, calculates the correction coefficient of above-mentioned curve inclination, will calculate the result again and be stored in the correction coefficient memory storage.
When measuring usually, in the mass conversion device, the content that the loading test section is exported according to curve of output memory storage and correction coefficient memory storage is converted into quality and demonstration.
It is to utilize will give putting less than the correction mass of weighing value 1/2 to load in the loading test section that span is proofreaied and correct, and the displayed value when making this can equal correction mass, thereby calculates correction coefficient, and the content of renewal correction coefficient memory storage is carried out.
In addition, in Fig. 2, the curve of output memory storage should be able to be stored when zero load, during the weighing duty value of this balance and give the output-figure-of-merit curve of the loading test section of the loading test section output calculation of asking when putting multiple correction mass load at least.The correction mass discriminating gear is at the span timing, can be in the middle of the above-mentioned multiple correction mass detects output by loading and differentiates that to load in the quality of loading test section be any correction mass.The correction factor calculation device, be according to the load differentiation result of the output of loading test section and correction mass discriminating gear when the loading test section of any one of multiple correction mass, calculate the inclination correction coefficient of above-mentioned curve, it is calculated the result and is stored in the correction coefficient memory storage.
It is to utilize from the multiple correction mass that is provided with that span is proofreaied and correct, and any one is loaded in the loading test section, and the displayed value when making this can equal correction mass, thereby calculates correction coefficient, and the content of renewal correction coefficient memory storage is carried out.
With embodiments of the invention, utilize accompanying drawing to illustrate hereinafter.
Fig. 3 illustrates the formation block scheme of the embodiment of the invention.
1 output of loading test section is gone up the electric signal of placing loading corresponding to scale pan 1a, and its digital conversion data are delivered to control section 2.Control section 2 is made up of microcomputer, comprise the CPU21 that carries out various computings and program and carry out various peripheral unit control, write the ROM22 of the curve of output calculation procedure of process of measurement, span correction program and description, non-volatile ram 23 with correction coefficient storage area of this curve of output and description, have the RAM24 that is detected storage areas such as the digital conversion data of output 1 output and various operation results by loading, these parts are connected by bus.Control section 2 is connected with the display 3 of representing variable according to the instruction of CPU21.
The following describes effect.At first, when electronic balance dispatches from the factory, select the curve of output calculation procedure.In this program, at least will be when zero load, during the mass loading of this balance weighing apparatus value and the loading during the correction mass load that can be provided with arbitrarily detect the output of output 1, for example utilize, lagranges interpolation can be obtained the output-figure-of-merit curve of loading test section.Soon for example comprise the known load of the quality X that above-mentioned n+1 is ordered at 3
0, X
1X
nThe output Y of loading test section 1 is surveyed in addition more respectively
0, Y
1Y
n, with Y=P(X) write as
Y＝l
0X
n+l
1X
n-1+…+l
n-1X+l
n…（1）
In the formula
Q
i(X)= (П(X-X
j))/(П(X
i-X
j)) …(3)
(the X that has a few that can provide by following formula
i, Y
i) obtain each coefficient l of (1) formula
0, l
1, l
n, this (1) formula promptly is stored in the non-volatile ram 23.
Secondly, selected amount is apart from correction program.In this program, the above-mentioned correction mass of having set is X
k, the loading during as if this correction mass load detects output 1 and is output as Y
k, curve Y=P(X then) and will pass through (X
k, y
k).The correction coefficient K that can proofread and correct (1) formula coefficient can be calculated by following formula,
Y
k＝K·P（X
k） （4）
At this moment, when arbitrarily selected correction mass when being multiple, then give and deposit multiple correction mass X
K1, X
K2, differentiate any correction mass of having loaded from the output size of loading test section 1, make that this correction mass is X
kWhen beginning, because curve P(X) by (X
k, y
k), so K=1, this K value promptly is stored in the non-volatile ram 23.
As mentioned above, after decision curve and correction coefficient, utilize process of measurement on scale pan 1a, to place test portion, this time the output Y of loading test section 1 can utilize (1) formula and correction coefficient K to be transformed into quality X, on display 3, show.
When change is provided with the place or carries out the span timing because of change waiting year after year, first selected amount is apart from correction program, and the weights that will have the setting correction mass places on the scale pan 1a, and then calculating correction coefficient by above-mentioned (4) formula upgrades, and later mass conversion is provided.
Correction mass can be set arbitrarily, and, curve P(X) be during according to this correction mass of actual measurement load, when zero load and the output of the loading test section 1 during the weighing duty value is obtained.So, proofread and correct even setting, also can be carried out span exactly less than the correction mass of weighing value 1/2.
Yet, deliver to control section 2 from the output of loading test section 1 by digital conversion, have usually ± the 1 digital conversion error of counting.Thereby, though also can correctly carry out the span correction, try to achieve correction coefficient K with near the correction mass the weighing value with the correction mass of light weight, its correctness is higher.When using multiple correction mass, give near the quality of setting earlier 1 weighing value,,, also can proofread and correct with near the correction mass the weighing value must correctly carrying out timing according to application target.
In the above-mentioned embodiment of the invention, ask example though utilize lagranges interpolation that the output-figure-of-merit curve of loading test section has been enumerated, utilize additive method to ask calculation also to be fine.Thereby what not necessarily need built-in curve of output asks the calculation program, utilizes other devices to obtain curve of output when dispatching from the factory, and stores its result again, also is fine.
As previously discussed, the curve of output that the correction mass of storage by any setting obtains according to the present invention simultaneously, at the span timing, utilizes the load of correction mass, calculates the correction coefficient of this curve of output inclination of compensation.So, even correction mass is set in less than weighing value 1/2, also can carry out free from error correction, so, availablely carry out span than the light a lot of counterweight of weighing value and proofread and correct.Particularly in to the electronic balance of big weighing, effect is obvious.
In addition, need tighter timing, also can proofread and correct with near the correction mass the weighing value.Promptly prepare cheap light-duty correcting-weight, prepare near the weights of weighing value when paying attention to accuracy, can carry out freely selecting according to user's purpose.
Also have, for the different multiple electronic balance of weighing value, an also available correcting-weight is proofreaied and correct.For example, weighing 200g, 300g, 500g, 5 electronic balances of 1Kg and 2Kg, the weight correcting of available quality 200g, its economic benefit is very big.
In addition, for the electronic balance that two ranges are arranged, when each range is set same correction mass, can utilize two ranges of same weight correcting.
Fig. 1 and Fig. 2 illustrate the functional-block diagram that the present invention constitutes, and Fig. 3 illustrates the block scheme that the embodiment of the invention constitutes, and Fig. 4 is the span correcting feature figure of electronic balance in the past.
1: the loading test section
2: control section
3: display
21：CPU
22：ROM
23: non-volatile ram
24：RAM
Claims (2)
1, a kind of electronic balance, it will be converted into quality by the output that scale pan loading produces the loading test section of electric signal, show with variable again, it is characterized in that, at least also include: storage according to described loading test section when zero load, during the weighing duty value of this balance and preset the curve of output memory storage that the output quality curve of calculating is asked in output when loading less than the correction mass of weighing value 1/2; The correction factor calculation device of the correction coefficient of calculating described rate of curve is asked in output when loading described correction mass according to described loading test section; Store the correction coefficient memory storage of this coefficient; And the mass conversion device, this balance is carried out utilize described curve and coefficient when span proofreaies and correct in the renewal that utilizes described coefficient, the output of loading test section is converted into quality shows.
2, electronic balance as claimed in claim 1 is characterized in that: also comprise and distinguish that quality that the span timing is loaded belongs to any correction mass discriminating gear in the multiple correction mass; Described curve of output memory storage according to the loading test section when zero load, during the weighing duty value of this balance and the output when presetting described multiple correction mass load ask and calculate output-figure-of-merit curve; Described correction factor calculation device is asked the correction coefficient of calculating rate of curve, the described correction coefficient of described correction coefficient memory device stores according to the output and the above-mentioned differentiation result of curve of output memory storage; The above-mentioned coefficient that described mass conversion device utilizes the load of any correction mass among the above-mentioned multiple correction mass to obtain by renewal carries out the span of this balance and proofreaies and correct, simultaneously, utilize above-mentioned curve and above-mentioned coefficient, the output of loading test section is converted into quality represents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85108471 CN1015131B (en) | 1985-11-21 | 1985-11-21 | Electronic balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85108471 CN1015131B (en) | 1985-11-21 | 1985-11-21 | Electronic balance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85108471A CN85108471A (en) | 1987-05-27 |
| CN1015131B true CN1015131B (en) | 1991-12-18 |
Family
ID=4796028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85108471 Expired CN1015131B (en) | 1985-11-21 | 1985-11-21 | Electronic balance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015131B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2038404C (en) * | 1990-05-16 | 1995-08-22 | Neil C. Griffen | Hysteresis-compensated weighing apparatus and method |
| DE112007003672T5 (en) * | 2007-09-03 | 2010-08-05 | Shimadzu Corp. | Electronic scale |
| CN110595588B (en) * | 2019-09-19 | 2021-03-02 | 四川虹美智能科技有限公司 | Beer cabinet and liquid supplementing method thereof |
-
1985
- 1985-11-21 CN CN 85108471 patent/CN1015131B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85108471A (en) | 1987-05-27 |
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