JPS6085333A - Electronic counting scale - Google Patents

Abstract

PURPOSE:To prevent the occurrence of human counting errors, by providing the first judging means, which compares an additional number with an allowable additional number, the second judging means, which compares a total number with a measuring number, and a reporting means of results; and reporting the respective correction and completion. CONSTITUTION:In an electronic counting scale, a load detecting part (a), a unit weight memory (b), an additional-number computing means (c), and an allowable- additional-number computing means (d) are provided. By a first judging means (e), an additional sample number NX is compared with the maximum allowable number Nmax. By a second judging means (g), the content SIGMANX of a total number memory (f) is compared with a measuring number NK from a measuring- number setting means (h). When exceeding is judged, a sample removing instruction from a pan is issued from a result-reporting means (i). When coincidence is obtained, completion of measuring is reported. Thus human measuring errors are prevented, and accurate counted value can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a counting scale, and particularly to an electronic counting scale suitable for weighing a fixed number of samples.

(b) Prior art Counting scales that calculate the number of samples by dividing the weight of the sample by its unit weight have been proposed in the past with various measurement methods with the main purpose of suppressing counting errors. There is C. However, with these conventional counting scales,
Although this method is effective when counting an unknown number of samples, there is a problem in that counting errors are likely to occur when weighing a fixed number of samples. In the process of weighing a certain number of samples, the samples are added one after another onto the plate.
The work is completed when the counting result reaches a certain number of pieces, but according to traditional counting methods, the worker reads the value every time the counting result is displayed and memorizes the number of pieces each time. The work must be carried out while making comparisons, which increases the possibility of human error in the number of sets.

(c) Purpose The main purpose of the present invention is to use an electronic counting method that does not burden the worker with memorization or comparative judgment in the weighing work of a certain number of pieces as described above, and therefore eliminates the occurrence of human counting errors. The purpose is to provide a measure. Another object of the present invention is to provide an electronic number scale that can always obtain accurate counts without causing counting errors when calculating the number of samples from the sample weight.

(d) Configuration The configuration of the present invention will be explained based on the functional block diagram shown in FIG.

The load detection section a detects the load placed on the plate. The unit weight memory b stores the unit weight W of the sample to be counted, and from the contents thereof and the load value on the plate from the load detection section a, the additional number calculation means C calculates the number of samples to be counted each time a sample is added on the plate. The powerful old fixed number Nx is calculated. Allowable additional pieces calculator ¥! jtd is rtt u with a preset probability based on the sample weight dispersion, determined in advance by the scale or inputted externally if known.
Allowable additional number N, which is the maximum powerful factor without error
Calculate max. In the first determination means e, addition +11
Each time i1 number Nx is calculated, add that value to allow1))
Comparing with il@Nmax, total number of memories! Then N
Only when xThNmax, the additional number Nx is added and stored. The second determining means g compares the content ΣNX of the total number memory f with the fixed number Nk to be weighed set by the number-of-weighing setting means. The notification means i determines that the number of additions Nx is the allowable number of additions Nm based on the determination results by the first determination means e and the second determination means g.
a, and the contents of the total number of memories f Σ
If Nx exceeds a certain number Nk to be weighed, a display or the like will notify you to that effect, instruct you to remove the sample from the plate, and store the contents ΣNx of the total number memory f.
Completion of weighing is notified when the number matches the fixed number Nk to be weighed.

(B) Example Embodiments of the present invention will be described below based on the drawings.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention.

The load detection unit 1 converts the load on the plate Ia into an electric signal using a built-in load cell, etc., and outputs it, and the signal is sent to the amplifier 2.
A-1) After being amplified by A-1), it is digitized by converter 3. The digitized load detection signal is taken into the microcomputer via the input port 4. The microcomputer includes a CPU 5 that controls each peripheral device and executes programs to be described later. ROM6 in which the program is written. It has a RAM 7 with an area for storing data and setting values, and the basic parts of 03C8 that generates a clock signal.In addition to the above-mentioned input port 4, a key port 9 and an output port 10 are provided. It is connected to the microcomputer by bus and address bus lines.

First and second displays 13 and 14 are connected to the output port 10 via drivers 11 and 12, respectively.
each has a plurality of 7-segment displays, and the CPU
Dynamic display can be performed based on commands from 5.

The scanning signal supplied from the output port 10 to the driver 12 is simultaneously supplied to the matrix type keyboard 15 connected to the key board 9, and
The scanning signal outputted from the pressed key on the keyboard 5 is read by the key board 9 and the key is recognized.

Next, the effect will be explained. FIG. 3 is a flowchart showing a data processing program written in the ROM 6 of the microcomputer.

First, the single weight of the sample to be counted (hereinafter referred to as unit weight)
Enter W using the keyboard 15 (STI). Next, for example, about 10 samples are sampled, the weights of each of them are calculated, and the coefficient of variation Cv of the sample weight is calculated by performing statistical calculations using these (ST2). This coefficient of variation CV may be configured to measure each weight using the scale and calculate it using the program, or
If the degree of variation in the sample is known, the configuration may be such that several preset coefficients of variation can be selected by operating the keyboard 15.

Once the coefficient of variation Cv is determined, the allowable additional number Nma is calculated based on the following formula (ST4).

Nmax = 1 / (6Cv) 'As is clear from the above equation, the allowable additional number Nmay is the maximum number of additional items that will not cause a counting error with a predetermined probability. In addition, the number Nk of samples to be weighed (hereinafter referred to as the number Nk to be weighed) to be weighed is set using the keyboard 15 (S"F3). When the above settings are completed, the allowable additional number N calculated in ST4 is set. max is displayed in the form of "Add Nmax" on the second display 14 as shown in FIG. 4 (ST5). At the same time, the contents of the total number register set in RAMV are cleared ( ST6
).

When a sample is placed on ff1la in the above condition (S'"7"
), the increased weight Wx is divided by the unit weight W to obtain the additional number N
x is calculated (ST8). The calculated additional number Nx is compared with the allowable additional number Nmax (ST9), and Nx
Only when ≦N max, the value Nx is added and stored in the total number register (STIO), and the contents of the total number register Σ
Nx is displayed on the first display 13 (STII). At the same time, the second display 14 displays the difference between the number of additional pieces Nx and the allowable number of additional pieces Nmax in the form of ``Add Na'' (sTl 2, STI 3), giving the operator the ability to add more pieces at once. Report the good news.

The content ΣNx of the total number register is compared with the weighed number Nk (STI 4), and while ΣNx does not reach Nk, the process returns to ST7 and further samples are added.

If the number of additional samples Nx exceeds the allowable additional number N may, the process proceeds from ST9 to 5T15 or less, and the operator is notified of this and instructed not to unload the sample. That is, the difference N between the allowable additional number N max and the additional number Nx
s is calculated (ST 15), and its value is displayed on the second display 14 in the form of "Sub Ns" as shown in FIG. 4(b) (ST 16).

In this case, the additional number Nx is not added and stored in the total number register, but the additional number Nx is separately added to the content ΣNx of the total number register before the addition, and the value ΣN
x' is displayed on the first display 13 as a guide (ST
17,5T18). When the sample is unloaded based on such a sample removal instruction, this is detected by a change in data from the load detection section 1, etc., and the process proceeds to ST8, where the additional number Nx is calculated again (ST19).

As shown above, allowable additional number N. Additional number N below max.
x is added sequentially, and eventually ΣNx becomes the weighed number N
When the number exceeds k, ΣN is calculated, and if x>Nk, the excess number NS' is calculated, and the value is displayed on the second display 14.
b Ns '” (ST20.5T22.
ST2'3) Instruct the operator to unload that number of samples. When the sample is unloaded, its removed weight and unit weight W
5T24.5T25) The number to be removed is calculated from , and the value is subtracted from the content ΣNx of the total number memory to update ΣNx (5T24.5T25), and the value is displayed on the first display 13 (ST26). Then, proceeding to 5T14 and below, Nk and ΣNx are compared again. In the case of Nk-ΣNx, the second display 14 displays “
"End" is displayed to notify that weighing has been completed.

(f) Effects As explained above, according to the present invention, the counting results of the samples on the plate and the fixed number of samples to be weighed are always compared, and when the two match, a completion notification is issued. The system is configured to notify that the aircraft will be unloaded when the vehicle is unloaded.
This eliminates the need for the operator to read the counting results each time, memorize them, and compare them with the number of pieces to be weighed, unlike when weighing using conventional equipment.This not only prevents human counting errors but also reduces the workload. It is possible to cause
The number of additional samples is constantly compared with the maximum number of additional samples that will not cause a counting error (permissible additional number) with a predetermined probability, and when more samples are added than the allowable number of additional samples, a notification is given to unload the excess sample, and in that case Since the additional number calculated in 1 is not added to the total number memory, no counting error occurs and an accurate count value can always be obtained.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing the configuration of the present invention, FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 3 is a functional block diagram showing the configuration of the embodiment of the present invention.
FIG. 4(a) is a flowchart showing a data processing program written in OM6. (bl and (c) are diagrams each showing a display mode by the second display 14. 1-Load detection unit 5-CPU 6-ROM 7-RAM 2S-first display 14-second display Device 15 - Keyboard Patent Applicant Shimadzu Corporation Agent Patent Attorney Nishi 1) New Figure 1

Claims (1)

[Claims] A load detection section that detects the load placed on the plate, a unit weight memory that stores the weight (W) of each sample to be counted, and the detected value by the load detection section and the contents of the unit amount memory ( W), an additional number calculating means that calculates the number of samples added on the dish (Nx), and a maximum additional number of samples (Nmax) that does not cause a counting error with a preset probability based on the weight variation of the samples. ); a first determining means that compares the calculation result (Nx) by the additional number calculation means with the allowable additional number (Nmax); A total number memory for adding and storing the value (Nx) only when Nx) is less than or equal to the allowable additional number (Nmax); a weighing number setting means for setting the number of samples to be weighed (Nk); a second determining means for comparing the contents of the total number memory (ΣNx) and the number of frames to be cut (Nk); and a notification means for notifying the determination results by the first and second determining means; When the number of additional pieces (Nx) exceeds the allowable additional number (Nmax), and the content of the total number memory (ΣNx) exceeds the number of framed pieces (Nx),
), it notifies you to that effect and instructs you to remove the sample from the plate, and also displays the contents of the total number memory (ΣN
An electronic counting scale configured to notify completion of weighing when 'x) matches the number of weighed pieces (Nk).