JPS58171629A - Electronically counting balance - Google Patents

Abstract

PURPOSE:To count up the required number of samples without errors, by adding and counting samples less than the maximum permissible number of samples to be added which are enabled to be counted without errors with the prescribed probability succesively specified in accordance with the coefficient of variation of the weight of the samples. CONSTITUTION:When the prescribed number, five e.g., of samples are put on an electronic balance 1 and a reference memory key 3 is depressed, the average weight of the samples is calculated and stored in an RAM. The 1st display part displays the number 5 and the 2nd display part displays the maximum permissible number, 16 e.g., of samples to be added previously stored in an ROM. On the basis of said displays, the number of samples less than 16, e.g. 15 samples, are put on the balance 1 and the same operation is repeated. Subsequently, 29 samples corresponding to 20 are measured. When the number of added samples exceeds a prescribed number and approaches the maximum permissible number of samples to be added, an alarm display part 5 informs the approach of the maximum number to be added by turning on the 1st alarm lamp, and when the maximum number to be added is exceeded, alarm the overweighted status by turning on the 2nd alarm lamp. Consequently, the average value is prevented from being compensated by the incorrect number of samples.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic scale that calculates the sample weight by dividing the sample weight by the average sample weight. Errors that occur when counting a large number of samples using
! This is to be blamed. In order to keep the error caused by the latter to a small level, conventionally, the average weight that should be used as a standard was
Each time a sample is added to the number of needles, it is corrected sequentially based on the total II number (41 1987-141072), or when correcting the average weight, a temporary average weight and an average weight are deposited, and the calculation is carried out within a predetermined accuracy. A system that determines whether the two match or not, and issues a warning signal if the two do not match (% open 1181H$
-70421) counting scale is adopted. However, with this method, if the number of samples added during additional weighing and counting is too large, the number of pieces obtained by dividing the tsuboelectric value by the temporary average value will be
In some cases, the error is close to a variable integer, and in this case, 1
There are town carpets that include the above errors. In such a case, it is not possible to perform any "rounding" operation on the number of needles that is less than 1, or to examine the consistency of the difference between the tentative average direct weight and the average weight. and #I4!1t-cannot be detected. Therefore, even if the average weight is corrected based on the value obtained in this way, the error in the number of stitches cannot be prevented.

The present invention eliminates the above-mentioned deficiencies in the counting method,
The purpose of counting is to provide porridge in which the occurrence of errors is controlled so that an error of VC1 or more does not occur during each count.

The present invention uses a quantity indicating the variation range of sample weight as a parameter, and stores the additional number of forged samples for each punch with a predetermined counting error, which is calculated in advance as 4 of the number of samples counted by Akatsuki. And, only when several samples are added, there is a means to correct the value of the standard 1 meter by dividing the 1 meter section shell by the number.

The present invention will be explained in detail below.

, FIG. 1 shows a block λ of the loincloth embodiment of the present invention. As shown in FIG. 2, the ζ section 1 converts the cargo on the tray into a digital signal and outputs it. The CPU includes various registers for calculations, a calculation unit, a clock signal generator 5, etc., and controls each peripheral device through a path line. A program is stored in the ROM, and 2 and 8 M temporarily store measured values 2, Hamahanadan, etc. These (jFU, ROM, RAMy, and
(Sly/ constitutes the microcomputer 2.

Keyboard 3 has numeric keys, reference memory key, average update key, IL bag pull-? and average clear key. The display 114 displays numerical values such as calculation results, and the warning display Wls warns against over-spillage of the additional sample.

Next, the sample counting procedure according to this embodiment will be explained.

First, a predetermined number of nine pieces 01, for example 5f[t-
If you change the weight to a of the child name and press the reference memory key, you will get the temporary average value m of at, which is obtained by dividing this weight by 6.

is calculated and recorded in the memory of Ormu MK. On the other hand, the $1 indicator on the display unit 4 displays the number 5.

Corresponding to this number 5, based on the curve of the maximum allowable additional sample number stored in fLOM in advance, the allowable maximum additional sample number 16 is displayed on the second display of display $4,
1 MK is memorized. 2. The above-mentioned Ilf volume maximum sample addition number song will be described later. Next, weigh a sample of 16 or less pieces, for example, tsm, based on the O#I indication.
Add IIIvc and press the average update key on keyboard 3. The first display displays the number of sample calls, 20, and the number of bruises, 20, from one batch stored in fLOM.
Equivalent to Vc, the next maximum allowable additional sample number of 29 is the second
is displayed on the display, and the memory of 8mm is updated from 16 to 29. From now on, until you have finished counting the desired total number of pieces,
Repeat the same process. In the warning display unit 5, when the number of samples to be added approaches the maximum allowable number of specimens to be added by more than a predetermined tsm, the corresponding warning light lights up and the maximum allowable number of specimens to be added is 471.
The second warning light lights up when the number of additional samples exceeds the maximum allowable number of additional wiping materials.
Warns you of "too much measurement". If the ts2 warning light lights up, the average update key will not operate, which prevents the average value from being corrected due to an incorrect number of pieces.
The allowable additional revenue sample number N stored in the ROM is a value obtained from the following formula % Cv = variation coefficient of sample weight, and in this embodiment, 0VK0.02 is used. Also, according to this formula, the probability that the counting error will be less than 4- can be determined as 99.7%. 2 in Figure 2 and the above formula O
The relationship between N and N is shown in a graph.

(b) It is also possible to store the relationship of the above formula for different Cv in the ROM and store it in JIP so that the universal Cv can be selected according to the weight variation coefficient of the sample to be counted.

Next, the operation of this embodiment will be explained based on the flowchart of the program shown in sS-. 2. The RAM in this embodiment 2 includes a register N that stores the number of samples on the scale 9, a register N' that stores the number of samples added to the scale 9, and a temporary average weight t-. A V register X, which records the number of added samples, is placed in the storage register.

At first, 2 was on step 11 and 41 was displayed! tri, the sample 11 on the scale ff1K is zero, and the second display is displaying a predetermined weighing amount n, %, for example 5. Place the sample in the scale 9<n1, and step 2 in step 12.
Average weight of sample of n + Im (average weight of 1)
m is calculated and stored in register i, and it corresponds to n from the curved edge of the maximum allowable additional sample number stored in the ROM, and nl is displayed on the first display and nl is displayed on the second display. If they are added to the plate on the plate, the additional number X is calculated in Step 13, and the total number
, +X are displayed. If the number of additional pieces exceeds N, the second
The warning light will come on (step 14) and a warning will be issued.
If the number of addition + m is less than or equal to N and the predetermined number Qt is not smaller than N, the first warning light lights up to notify you that the number of additions is close to N. At the same time, additional items are added due to replenishment (warning the counter person so that the number does not exceed N).

Except when the #i2 warning light lights up, the sample-it is updated to Wl in step 15 by operating the average update key.
Ws Ic has been changed from , and the calculation is step 12.
Return to the step "NlwInI", which is the previous step, and repeat the same 1m step until the number of samples for age 1 is counted.

As described above, according to the present invention, samples with a number of moth large permissible test U, a710 or less with a predetermined probability of zero error, which are sequentially specified according to the coefficient of variation of the sample weight, are By adding the additional number of needles, it is possible to count the number of samples without error.If a certain amount of error is allowed in the counted value; It is also a good idea to use an approximate line graph instead of a curve such as Only when a sample is added, it is determined whether the weight value has stabilized or not, and when it has stabilized, the I! analysis is automatically performed.

Stability is determined if the weight value does not change by more than a predetermined value within a predetermined time.

[Brief explanation of drawings]

Figure 1 is a block diagram of the embodiment of the present invention, diagram N2 is a graph showing the relationship between the number of sample steels already available and the maximum allowable number of samples i@m, and diagram HS is the jLOM program adopted in the embodiment of the present invention. It is a flowchart figure. 1...(Sub scale part, 2...1 Microcomputer, 3...Keyboard, 4...Display part, 5...Warning display part, 11-15...Steps of flowchart. Patent applicant Shimadzu Corporation Daisanjin Patent attorney +61) Shin

Claims (1)

[Claims] Calculate the number of samples by calculating the number of samples by predetermining the weight of the sample and dividing it by nine standard weights.The number of electronic needles is 2 per second. A memory is provided to store a functional relationship between the allowable maximum sample addition faII! and the allowable maximum sample addition faII! The feature is that when a sample of less than L is added, the total weight is divided by the number of cases and the value of the reference weight is corrected (sub-counting scale).