JPS645643B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic balance, and more specifically,
Concerning the average processing method of input data in electronic balances.

In highly sensitive electronic balances, the display changes significantly due to temporary disturbances such as sudden micro-vibrations, so a method to suppress 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's 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 the set value, it is treated as a normal set 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 function is a function of the latter, and there are some embodiments in which the latter is a function.

Embodiments of the present invention will be described below with reference to the drawings.

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

The electronic scale 1 converts the data of the load W into a digital signal and outputs it every minute, for example, every 0.2 seconds. The register device 2 has an area for storing (n+1) pieces of data, the newest collected data is stored in d ₀ , and each time data is input, d ₀ → d ₁ →... → d _o-1 → The data is shifted sequentially with d _o and the oldest data d _o is pushed out and discarded. The control section 3 includes a data transfer control section 31, an arithmetic device 32, an average time setting device 33, an allowable width setting device 34, a comparison/determination device 36, and a programming device 37. In accordance with the program 37, this calculation device 32 calculates the average of the data of the average time specified by the average time setting device 33 and outputs it to the display and recording device 4. Further, according to the program 37, the calculation device 32 calculates the difference (d ₀ − d ₁ ) between the latest collected data d ₀ and the data d ₁ just before, or calculates the difference between the latest average value X ₀ and the average value X just before Difference of _0-1 (X ₀ −X _0-1 )
etc. are calculated and output to the comparison/judgment unit 36. The comparison/determination unit 36 determines whether the difference calculated by the arithmetic unit 32 with respect to the set value of the allowable width setting unit 34 is large or small. The average time of the average time setter 33 changes according to a manual input to the setter or a program. Note that the register device 2 and the control section 3 can be implemented by a microcomputer.

FIG. 2 shows a flowchart of a program according to an 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 ₀ . Next, in process 1, d ₀ → d ₁ , d ₁ → d ₂ ,
…After the data shift of d _o-1 → d _o is executed,
A data averaging operation D _M =1/N _N 〓 ⁿ⁼¹ d _o is performed. Next, the latest data d ₀ is collected into the empty register. The preset allowable width e is taken in from the allowable width setter 34 to the judger 36, and in judgment step 21 it is determined that the absolute value of the difference between the latest input data _d0 and the average value D _M is greater than the allowable width e. It is determined whether |d ₀ −D _M |>e. When "simple average display" is written in FIG. 3, it means that the value is within the allowable range, and it is determined as "NO" and the process proceeds to process 2. In this process 2 ^, an average calculation of five pieces of _data including the _latest input data d ₀ is executed _and the data is displayed.

If the latest input data d ₀ exceeds the allowable range due to disturbance, the decision step 21 makes a "YES" decision and moves on to compression processing. In other words, as shown in Process 3A, when (d ₀ - D _M ) is positive, the latest input data d ₀ is replaced with (D _M +e), and when it is negative, it is replaced with (D _M - e). Ru. A transition graph of measured values based on this replacement data is shown by a dotted line portion A in FIG. 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, a judgment step 22 determines that the permissible value has been exceeded in the same direction after a specified number of times K, for example two times, and after the third time, the compression process is released and the process returns to the normal simple average. , immediately display the new load value.

FIG. 4 shows a partial diagram of a flowchart of another embodiment of the present invention. This partial diagram is Process 3A in Figure 2.
will be implemented instead. This feature lies in the fact that the amount exceeding the allowable value +e or -e is compressed to 1/N. If d ₀ is the latest input data, _DM is the average value before d ₀ , and e is the tolerance value, the compressed data d ₀ ′ is d ₀ ′=D _M ±e+1/N (d ₀ −D _M 〓 e) It is expressed as The sign of e is (d ₀ −
When D _M )>e, the upper row is used, and when (d ₀ -D _M )<-e, the lower row is used.

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 flow chart of still another embodiment of the present invention. This partial diagram is carried out in place of process 3A in FIG. This characteristic part is that the amount S exceeding the tolerance value +e or -e is compressed to √. That is, it is expressed as d ₀ ′=D _M ±√| ₀ − _M 〓|. 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, if a disturbance occurs temporarily, compression processing is performed without reducing the average number of times, and when the tolerance value is exceeded in the same direction more than K times, this means that a load change has occurred, so the average number is reduced to the minimum. , for example, return to 4 times and quickly display it, and after the load stabilizes and falls within the allowable range again, the average number of times is increased sequentially until it reaches the maximum number of times predetermined by the memory capacity, for example, 25 times. Then, from then on, the average calculation is performed using the maximum number of averages 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 not change, which is not necessarily the best from the viewpoint of ease of use, but 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 stability of the display against disturbances is greatly improved, and when the load fluctuates, it is possible to promptly display a response. Furthermore, since the present invention is mainly implemented using microcomputer software, 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 diagram of an embodiment of the present invention.
FIG. 2 is a flowchart of the program of the program device 37 of FIG. 1, and FIG. 3 is an explanatory diagram of the operation of the embodiment of the present invention. 4 and 6 are partial diagrams of program flowcharts of other embodiments of the present invention,
FIGS. 5 and 7 are explanatory views of the operation of the embodiment shown in FIGS. 4 and 6. FIG. DESCRIPTION OF SYMBOLS 1...Electronic scale, 2...Register, 3...Control unit, 32...Arithmetic unit, 4...Display and recording device, 33...Averaging number setting device, 34...Tolerance width setting device, 36... Comparison/judgment device, 37...programming device.

Claims (1)

[Scope of Claims] 1. A device that converts a load into electrical data moment by moment, temporarily stores the data in a register sequentially starting from the latest data, averages the temporarily stored data, and displays or records the data, The first step is to find the difference between the average value of the latest data stored in the register and the average value of past data, and determine whether the difference exceeds a predetermined tolerance range. a data processing means that performs processing such as replacement or compression on the latest data stored in the register when it is determined that the permissible range has been exceeded; A second judgment means for judging whether or not a predetermined number of pieces of judged data are consecutive, and a means for instructing to stop the data processing after it is judged by the second judgment means that a predetermined number of pieces of data are consecutive. An electronic balance characterized by: 2. The electronic balance according to claim 1, wherein the data processed by the data processing means is equal to a limit value of the allowable range. 3. The electronic balance according to claim 1, wherein the data processed by the data processing means is a function of the limit value of the tolerance range and the latest data.