JPS58204326A - Electronic counting scale - Google Patents

Abstract

PURPOSE:To prevent generation of an error, by dividing sample weight by mean weight, rounding a fraction, calculating the number by regarding the previous fraction as zero, and thereafter, repeating plural times the step for calculating the total number including the previous time. CONSTITUTION:An electronic scale part 1 converts a load on its plate to a digital signal and outputs it. A CPU contains various registers for operation, an operator, a clock signal generator, etc., and controls each peripheral equipment through a bus line. A program is stored in an ROM, and an RAM stores temporarily a measured value, an operated value, etc. These CPU, ROM, RAM and the bus line constitute a microcomputer 2. A keyboard 3 is provided with a reference clear key, a reference key, a tare subtracting key and a numerical key. A diaplay part 4 displays a numerical value of an operation result, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic scale VC that calculates the number of samples by dividing the sample weight by the total average sample weight.

Counting involves errors that occur when counting multiple samples with a scale, errors of the scale itself, and errors of the samples to be counted! However, the present invention has developed an electronic meter &
The purpose is to provide bittern.

As a means of achieving the above objective, a method is used to improve the accuracy of the average weight of the samples, which is the standard for counting, by sequentially correcting it by the total number of samples divided by 2 each time an additional sample N is counted. is proposed. However, even though this method improves the accuracy of the average weight, there are variations in the critical condition of the samples to be measured, so if a certain number of samples (depending on the degree of variation) are counted all at once, an error will inevitably occur. Something will happen! As a countermeasure to this problem, the inventor has already developed an electronic counting scale 1-special@1984-542
89 J and [Patent Application No. 57-54240 J].

The present invention uses a simpler method than these electronic counters and scales to prevent errors in counting. The number of pieces was calculated by dividing the sample weight (weight) and rounding the fraction to the nearest whole number.In contrast, in Kikabuto Town, the sample weight added to the plate in multiple parts: kfr average W amount (standard N Divide by the quantity), round off the fraction to the nearest whole number, and calculate the number of pieces, and at the next additional measurement, correct the previous fraction to essentially zero and calculate the total number of pieces from the previous time. A feature of this method is that it is possible to measure a large number of items without error by repeating the steps of calculating and displaying them multiple times.

that's all? As an actual example, a case will be described in which a test R with an average weight of NjjjLM-1g and a total of 500 pieces is divided into 5 times and counted on a plate.

First weighing sample individual desire 5011!1! 1i50. Of
2nd additional trial P + individual ridge 123 crowd heavy electric 12B, 2f3
The number of additional samples for the second time is 1u6i, the weight is 106.2F, the fourth additional blade sample j is 1 & 129, the number of additional samples for the fifth time is '12', the weight is 92.19; In the counting 1 count, 1st time: 50.0 ÷ 1 = 50.0 −-→ 50 pieces 2nd time tracking force i he: (50-μm 23.2 ) ÷ 1 = 178.2-1 →
After adding 178 pieces for the 8th time: (50128,2-i106.jIJ÷1 =279.
4-) 279 pieces after the 4th fence: (501123.2+106.2+L29.2)Mo1=
408.6 After the 5th addition of 409 pieces: (50+128.2+106.2+129.2+92.
1) ÷1=5σQ, 7 501
After the fourth addition, one more number &1- than the actual number will be displayed.

- Just counting the strength wood invention: 1st time: 50 ÷ l → 50 = 50 pieces After 2nd addition: 50 + (128, 2 ÷ 1) → 50 + 128 = 178 pieces 8
After the second addition: 178+(106,2÷1)→17g+106=279
After the fourth addition: 279 + (129, 2 ÷ 1) → 279 + 129 = 408
After the 5th addition: 408 + (92-1 ÷ 1) → 408 + 92 = 500 pieces, and there will be no erroneous ih generation.

The present invention will be explained in detail below.

FIG. 1 is a block diagram of a zero-start #'liE embodiment. In the figure, the electron force/reflex section 1 converts the entire load on the plate into a digital signal and outputs it. The CPtJ contains various registers for calculations, arithmetic units, tarock signal generators, etc., and controls all peripheral devices through all the pass lines. A program is stored in the ROM, and the RAM temporarily stores all measured values, calculated values, etc. These CPU%ROM%RAM and pass line constitute the microcomputer 2.

Keyboard aFi standard clear key, standard memory key, tare key and numeric key gold bias. The display unit 4 displays numerical values such as calculation results.

Next, the process of counting the number of samples according to this embodiment will be explained using a chart 70 (chart 70) which explains the entire program of the ROM in this embodiment.
Figure 8) and time chart of electronic scale weighing output (
The explanation will be based on Fig. 2). In step 11 R
After the AM memories mostrll and m2 are cleared, the system waits for the input of the price key.The measurer then inputs the number of reference samples using the numeric keys and then presses the reference key & set key to set the number i1. nt is stored in the memory month. Next, use the numerical keys to input the number n' that can be counted without causing a counting error, which was determined separately, and then press the count upper limit setting key, and that number n' is stored in the memory n'. Displayed on display 2. For simplification, n may be a predetermined value and stored in all ROMs.

Next, proceed to step 12 (No), and the track area before placing the sample enters mQ in step 13, and then step 1
Returning to step 2, this operation is repeated so that the latest weighed value is always stored in mQ. When the sample on the reference side &nt is fully loaded, step 12 determines that a "rapid weight change" has occurred on the scale, and step 13 stops reading the weight, but the weighing value just before the sample is placed is stored in the RAM memory. mo
is stored in After that, when the scale becomes stable and the weighing output becomes stable, the weight of the reference number of samples is calculated in step 14 from the weighed value i and the value stored in the memory mo as W1=W-mg. This Fi corresponds to the difference in the balance output between points A and B in FIG. In addition, in step 12, for example, if the weighing output (analog or digital) of the electronic scale changes beyond a predetermined voltage value range of plus and minus, all of it is detected and the presence or absence of a "rapid weight change" is determined. It is configured like this. The reference number of sample types jPr W 1 calculated in step 14 is divided by the reference number nl in step 15, and is stored in the RAM memory m1 as the reference sample average weight. If the tare subtraction key and the reference clear key are not operated, step 16 proceeds to NO in the same manner as step 12, and the weighed value 'km2 is entered in step 1γ, and this operation is repeated.

Next, the number of trial Pr that can be counted without counting errors n
When the number of test Plf electrons within ' is placed on the shelf, step 16 indicates that there is a "sudden weight change" on the scale '#4
], and the reading of step 1rf1 weight is stopped, but the weighed value immediately before adding the sample is stored in the RAM memory m2. After that, when the weight value W' of the scale becomes stable, calculation is performed in step 18, and fractions less than 1 of NJ are rounded off to calculate the number of additional samples Np.

Next, the process proceeds to step 19, where the additional number N is the count upper limit n
If it is less than or equal to n, proceed to YES and proceed to step 2.
After nl+Np (currently counted number in the cabinet) is reloaded into the nl memory at 0, the process returns to step 15, and this operation is repeated until the predetermined number of items has been counted. What is important to note is that the number is not displayed by dividing the weight of all the samples placed on the electronic scale by the reference weight, but by dividing only the additional sample (W-mg) by the reference weight. The number is calculated by dividing 9N pieces (the previous fractional error of less than 1 piece is not included), and the total is 9N pieces before that, which is the total of 9 pieces!
The point is that the total number is displayed as the sum of ``pieces & n 1''. Therefore, no matter how large the total number is, it is possible to display it with no counting error. Note that the additional number N is added in step 19.

If the count exceeds the upper limit ne, the process goes to NO, and in step 21, the display on the display 1 is blinked to warn of overloading. At this time, the counter person drops the sample a little, and N p S n
', the process stops at point M, 2, and proceeds to step 20 to return to the normal routine.

In addition, as a modified embodiment within the scope of the claims of the present invention, the "blinking of the display 1" in step 21 may be changed to a warning hump or a warning flash. The display 2 can be omitted. If there is enough ROM capacity, you can directly enter all the keys for the upper limit value.The standard deviation (SD) or variation coefficient D & (Cy, Cy - 1, m = average weight) indicates the degree of variation in sample weight. ) Calculate t-key-i and update the S-degree average value ml and the upper limit value n of additional counts. can get.

The simplest example is to omit all &value upper values, and to use the standard clear key and count upper limit value setting key. omitted,
For example, a meter and scale (a scale that counts only samples with a Cv of 1% or less) can be implemented in which the reference -rf, , is predetermined to be 10 pieces, and the upper limit for counting is set to 50 pieces.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of an embodiment of the present invention, and FIG. 2 is a time chart of weighing output from the electronic scale section of this embodiment.
FIG. 8 is a 70-chart showing the program of the ROM of this embodiment. DESCRIPTION OF SYMBOLS 1...Electronic balance part, 2...Microcomputer, 3...Keyboard, 4...Display part, 11
~21... Each step of the flowchart. Patent applicant &i! Co., Ltd. I: Manufacturing agent Patent attorney Nishi 1) Analysis

Claims (3)

[Claims] (1) In a device that calculates and stores the average weight by dividing the sample weight of a known number of samples by the number, and calculates the number by dividing the sample weight of an unknown number by the above average weight, the upper limit of the number of samples to be counted is means for storing, means for detecting sudden increase in titanium, means for determining the increased weight of the loaded load, means for determining the increasing side 1k by converting the increased weight into the number of pieces and rounding the fraction to an integer, and the increasing number of pieces. has a means for determining whether or not exceeds the upper limit of the number of stored nine-fold failures, a means for issuing a warning in the case of exceeding the upper limit, and a means for calculating and displaying the cumulative value of the increased number; When the sudden weight change mentioned above was detected @
is, after subtracting the previous tsuta deception value from the subsequent heavy weight loss, ice the increasing type it, divide it by the average N amount, convert it to a number, convert it into an integer, and exceed the above upper limit. The electronic counter is configured to judge whether the number of objects exceeds the number of objects, issue a warning if it exceeds the number of objects, convert it into an integer, display the cumulative total of 1, and repeat this operation until the measurement of the required number of objects is completed. (2) The electronic counting scale according to claim 1, wherein the upper limit of the number of items to be counted is a predetermined value. (3) The electronic meter and scale according to claim 1, wherein the upper limit of the number of items to be counted is set by an external input means.