JPH021246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piece counting scale that calculates an unknown quantity using a weighted value of a sample of an unknown quantity as a dividend and a predetermined average unit amount of the sample as a divisor. It is an object of the present invention to provide a measuring method that has good workability and can be expected to improve efficiency, and an apparatus for carrying out the method.

Conventionally, when weighing, first a sample of a known number x representing the unknown number Then (X-x)
The number of samples is calculated by further loading the sample into the load converter and weighing it, and dividing the weight value of the sample of unknown quantity X by the average unit amount determined in advance. However, in this case, the following points are unfavorable. When the sample of the unknown quantity X and the counting scale are located at separate locations, the following two methods of transporting the sample can be considered.

(a) Transport the sample of known quantity x to the counting scale, and then transport the sample of (unknown quantity x - known quantity x) to the counting scale.

(b) Samples with unknown number

In case (a), it is necessary to transport the pieces to the counting scale twice, resulting in poor work efficiency. In the case of (b), if the sample with unknown quantity The dedicated time is long and the operating rate of the transport device is reduced.

On the other hand, in the weighing method according to the present invention, a sample of unknown number An average unit amount is calculated from a third weight value obtained by subtracting the weight value of from the first weight value and the known number x, and from this average unit amount and the second weight value ( This method is characterized by calculating the number of samples of unknown number X - known number x), and this measuring method will be explained below based on a specific example.

Figures 1 and 2 show the configuration of a piece counting scale and the weighing process for carrying out the weighing method according to the present invention.
is a load cell as a load converter, which outputs an analog voltage at a level corresponding to the applied load value. 2 is a tray for placing the object to be weighed, 3 is a container for holding the object to be weighed, 4 is an amplifier, 5 is an analog-to-digital converter (hereinafter referred to as ADC), 6 is a tare eraser as a tare eraser, A tare memory 8 whose contents are updated to the output of the ADC 5 at that time when an operation of the tare button 7 is detected; and a first tare memory 8 whose contents are a subtractive number (-) and the output of the ADC5 is a minuend (+). It is composed of a subtraction section 9. 10 is a net weight memory as a first memory; when an operation of memory button 11 as a write instruction is detected, the contents are updated to the output data of the first subtraction section 9 at that time, and as a clear instruction, clear button 1 is pressed.
The operation of step 2 is detected and the contents are cleared to the weighed value "zero". 13 is a second subtraction section as a subtraction means;
The output of the first subtraction unit 9 is taken as the minuend (+), and the contents of the net weight memory 10 are accepted as the subtrahend (-). 14 is a numeric keypad memory that stores the numerical values keyed in on the numeric keypad 15, and the stored value acts as a set number. Reference numeral 16 denotes a division section as a first division means, which calculates the average unit quantity using the output of the second subtraction section 13 as the dividend and the output of the numeric keypad memory 14 as the divisor. Reference numeral 17 denotes an average unit weight memory, which detects the operation of the unit weight memory button 18 and stores its contents in the dividing unit 16.
Update to output. A dividing section 19 serves as a second dividing means, which takes the output of the average unit weight memory 17 as a divisor and receives the output of the second subtracting section 13 as a dividend. 20 is a number display device that digitally displays the output of the dividing section 19 as a number. 21 represents a sample.

With this configuration, first, the empty container 3 is placed on the tray 2, the tare button 7 is operated, and the contents of the tare memory 8 are updated to the tare weight. Next, a sample 21 of unknown quantity X is placed in the container 3.
Place the sample 21 on the plate 2 [a-
1], and then operate the memory button 11 to update the contents of the net weight memory 10 to the net weight _GX of the sample 21 of the unknown quantity X [a-2]. In this state, the minuend (+) and the subtrahend (-) of the second subtractor 13 are equal, so the data output from the second subtractor 13 has a weighted value of "zero". Next, take out the sample 21 of the known number x from the samples 21 of the unknown number X contained in the container 3 [a-
3], and also keys in the known number x on the numeric keypad 15 to write x as the set number in the numeric keypad memory 14 [a-4]. At this time, if the net weight of sample 21 (unknown number x - known number x) is Gx, then
The output of the second subtractor 13 is |Gx− _G
The weight value is the weight value for 21 samples, and the division unit 16 executes the calculation |Gx- _Gx |/x to calculate the unit amount a. When the unit quantity memory button 18 is operated, the division unit 1
The contents of the average unit weight memory 17 are updated to the unit weight a of the 6 output [a-5], and then when the clear button 12 is operated, the net weight _G Clear the weight value to “zero” [a
-6], and the output of the second subtractor 13 is the net weight
The dividing unit 19 executes the calculation (Gx/a) to calculate the number of samples for (unknown number X - known number x), and this is displayed on the display device 20 [a -
7] To be done. Therefore, the unknown number X to be obtained is the sum of the number displayed on the display device 20 and the known number x. With this weighing method, when a sample of unknown number Since this is not necessary, the transport device can be engaged in transporting the samples to be used for the next count calculation, which improves the operating rate of the transport device and improves the workability when performing repeat count calculations.

In the above embodiment, the number of samples (X-x) is displayed on the display device 20, but the display device displays the number of samples calculated by the dividing unit 19 plus the number set in the numeric keypad memory 14. The same effect can be obtained even if the display is configured to be displayed as 20.

As explained above, according to the measuring method of the present invention,
The object to be weighed, which consists of a large number of samples, only needs to be moved twice, at the beginning and at the end of counting, so it is easier to work than in the past and can be expected to improve efficiency.

[Brief explanation of drawings]

The drawings show a specific embodiment of the measuring method according to the present invention, and FIG. 1 is a block diagram of a counting scale, and FIG. 2 is a diagram illustrating the calculation process. 1...Load cell [load converter], 6...Tare eraser, 10...Net weight memory [first memory], 11...Memory button, 12...Clear button, 1
3...Second subtraction section, 14...Numeric keypad memory,
16...Division unit [first division means], 17... Average unit weight memory, 19... Division unit [second division means], 20... Display device, 21... Sample.

Claims (1)

[Claims] 1. Weigh a sample of unknown number is subtracted from the first weighed value.
An average unit weight is calculated from the weighed value and the known number x, and the number of samples (unknown number x - known number x) is calculated from this average unit weight and the second weighed value. How to measure using a piece counting scale. 2. A first memory that detects a write instruction and reads the weight value output from the tare erasing means, detects a clear instruction and clears the contents to the weight value "zero" regardless of the weight value; 1, a subtraction means which takes the content of the memory of No. 1 as a subtractive number, and a calculated value of the output of the tare erasing means as a subtractive number; a first division means, which takes the output of the subtraction means as a dividend and a set number as a divisor; A piece counting scale characterized by being provided with a second memory for storing an output, and a second dividing means for calculating the number of samples of an unknown quantity using the contents of the second memory as a divisor and the output of the subtracting means as a dividend. .