JPS5862526A - Electronic balance - Google Patents

Abstract

PURPOSE:To improve stability without damaging responsiveness of a display, by a method wherein, in case an unexpected abnormal data due to disturbance enters when a data is steady, the abnormal data is compressed to continue to perform an averaging. CONSTITUTION:A latest input data is compared with a means value of preceding input data, and if the result is within a predetermined allowable range, the latest input data is adopted as it is to perform a mean computation, and if it exceeds the allowable range, the latest data is replaced with a value, which is compressed to a tendency approximating a mean value of preceding data, to perform a means computation. If it exceeds in succession more than a predetermined number of times, it is handled as normal measurements. This causes the sharp improvement of stability of a display against distrubance, and permits to perform a display in a rapid response to fluctuation on a load.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic balance, and more specifically, to a method for averaging input data in an electronic balance.

With high-sensitivity electronic balances, temporary disturbances such as sudden micro-vibrations can greatly affect the display, so a method of suppressing this is to average a large number of data and display the average value. However, this method has the disadvantage that the response of the balance display is extremely slow, which is a particular problem when weighing and measuring.

The purpose of the present invention is to compress the abnormal data and continue averaging it when sudden abnormal data due to disturbance enters while the data is stable, thereby stabilizing the display without impairing the responsiveness of the display. Our objective is to provide an electronic balance with improved accuracy.

To summarize, the electronic balance of the present invention compares the average value of the latest input data and previous input data, and if it is within a predetermined tolerance range, the latest input data is taken as is and the average value is calculated. If the calculation exceeds the above tolerance range, the latest data is replaced with a numerical value compressed toward the average value of the previous data, and the average calculation is performed, continuing for a preset number of times or more until the above tolerance range is exceeded. It is characterized in that it is configured so that when it exceeds , it is treated as a normal measurement value.

In the present invention, the compressed numerical value is always equal to the limit value of the tolerance range regardless of the value of the data that exceeds the latest tolerance range, and the value of the data that exceeds the latest tolerance range and the limit value of the tolerance range. There are some embodiments in which the latter function is a function of , and there are several embodiments in which the latter function is a function of . Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a block diagram of an embodiment of the present invention.

'The Shigeko scale 1 converts the data of the lending book W into a digital signal every minute, for example, every 0.2 seconds, and outputs it. The register device 2 has an area for storing (n+1) pieces of data, and the newest collected data is stored in do, and each time data is input, do→d1→...→d
The oldest data d is shifted sequentially from n-1-prim.
n is pushed out and discarded. The control unit 6 includes a data transfer control unit 61, an arithmetic unit 62, an average time setter 66, an allowable width setter 64, a comparison/determination unit 36, and a program device 3.
7. In accordance with the program 37, the calculation device 32 calculates the average of the average time data specified by the average time setting device 63 and outputs the averaged data to the display and recording device 4. In addition, according to the program 67, the arithmetic device 62 calculates the difference (dodl) between the latest collected data do and the data d1 immediately before, or calculates the difference (dodl) between the latest average value and the average value X0-1■11 immediately before. Xo
It is determined whether the difference calculated by the calculation device 62 with respect to the set value of 4 is large or small. The average time of the average time setter 66 changes according to manual input to the setter or according to a program. Note that the register device 2 and the control section 3 can be implemented by a microcomputer.

FIG. 2 shows a 70-chart of the program according to the embodiment of the present invention, and FIG. 3 shows an example of changes in measured values.

When the program starts, initial settings are made, and then data d, . Next, in process 1, d0→dl s d1→d2.・
...After the data shift from dn-1 to da is executed,
A data averaging operation is performed. Next, the latest data d0 is collected into the empty register. Pre-set allowable width e
is fetched from the allowable width setter 34 to the determiner 36, and in a judgment step 21, it is determined whether the absolute value of the difference between the latest input data do and the average value DM is larger than the allowable width e, that is, ldO-DMI>e. is judged. In Figure 3, when it is written as simple average display, it means that it is within the allowable range.
No'' is determined, and the process proceeds to process 2. In process 2, an average calculation of five pieces of data including the latest input data do is executed and the data is displayed.

If the latest input data do exceeds the allowable range due to disturbance, the decision step 21 makes a determination of "YE8" and moves to compression processing. That is, as shown in Process 6A, (dO
When DM) is positive, the latest input data do is (DM+1
3) When it is negative, it is replaced by (DM-e). The transition graph of measured values based on this replacement data is shown in the third graph.
This is indicated by the dotted line section A in the figure. Due to such compression processing, the display data changes only slightly. When the disturbance disappears, it returns to the normal simple average again.

If the load increases, it is determined in step 22 that the load has exceeded the specified number of times, for example, twice, and exceeded the allowable value in the same direction.
After the third time, the compression processing is released and the normal simple average is returned to, and the new load value is immediately displayed.

FIG. 4 shows a partial diagram of a seven-stomach chard according to another embodiment of the present invention. This partial diagram is carried out by replacing the process 6A in FIG. 2 by 11 degrees. The characteristic part of this is that the amount exceeding the tolerance value of 10e or -0 is compressed to 17N. If do is the latest input data, DM is d, the previous average value, and e is the tolerance value, the compressed data is d. / is (lOt=DM+e+ (d
o King Dy e) is killed. Regarding the sign of e, the upper one is used when (do-DM)>6, and the lower one is used when 1:: (do I)M)<-e.

FIG. 5 shows a measured value transition graph in this example. The dotted line portion indicated by B in the figure is due to compression processing.

FIG. 6 shows a partial diagram of a flowchart of still another embodiment of the present invention. This partial diagram is carried out in place of the process 6A in FIG. This characteristic part has a tolerance value of +e or -e
It is at the point where it has exceeded S and has been compressed into JI. That is, it is expressed as do/=DM±l do DM-Fel. In FIG. 7, a dotted line portion C shows a measured value transition graph due to replacement in this embodiment.

The present invention can also be implemented in an averaging method in which the number of averages is successively increased as long as the input data is within a permissible range. In this case, when a temporary disturbance occurs, compression processing is performed without reducing the average number of times, and when the allowable value is exceeded in the same direction more than K times, this means that a load change has occurred, so the average number of times is reduced to the minimum. , for example, go back to 4 times and display a continuous display, and load *'! , After stably entering the permission range again, the average number of times is increased sequentially, and the maximum number of times determined in advance according to the memory capacity,
For example, when the number of times reaches 25, the average calculation is performed using the maximum average number of times as long as the allowable value is not exceeded.

A particular method of the invention is to maximize compression.

That is, the difference from the average value can also be set to zero. In this case, if a disturbance occurs, the display will warp and the display will not change.Although it is not necessarily the longest in terms of ease of use, the stability of the display can be improved. Note that this may be done by ignoring data that exceeds the tolerance.

According to the present invention, the display stability against disturbance is high +1'
In addition, when the load fluctuates, a prompt response can be displayed. In addition, since the present invention is implemented by microcomputer software in the main stitching, it can be easily implemented by simply changing the program of an existing microcomputer-controlled electronic balance.

[Brief explanation of the drawing]

FIG. 1 is a circuit block configuration diagram of an embodiment of the present invention, FIG. 2 is a flowchart of a program of the program device d67 of FIG. 1, and FIG. 3 is an explanatory diagram of the operation of the embodiment of the present invention. FIGS. 4 and 6 are partial diagrams of program flowcharts of other embodiments of the present invention, and FIGS. 5 and 7 are explanatory diagrams of operations of the embodiments according to FIGS. 4 and 6. 1...Electronic scale, 2...Register, 3...Control unit, 32...Arithmetic unit, 4. ...Display and recording device, 66...
...Averaging number of times setter, 34...Tolerance width setting device, 36...Comparison/judgment device, 37...Program device. Special = 't' p Applicant □ Shimadzu Corporation Agent Patent Attorney Nishi 1' (J New! ,,,JFigure 6

Claims (3)

[Claims] (1) A memory that collects measured values every moment and stores the values sequentially, a comparison means that compares the contents of the memory with the latest input data, and a counting means that counts the number of data. It compares the average value of the latest input data and the previous input data, and if it is within a predetermined tolerance range, the latest input data is taken as is and averaged. When the above tolerance range is exceeded, the latest data is replaced with a numerical value compressed toward the average value of the previous data, and an average calculation is performed, and the above tolerance range is continuously exceeded for a preset number of times. An electronic balance that is configured so that when the value exceeds that value, it is treated as a measured value. (2) The electronic balance according to claim 1, wherein the compressed numerical value is equal to a limit value of the allowable range. (3) The electronic balance according to claim 1, wherein the compressed numerical value is a function of the limit value of the allowable range and the latest data.