JPH0132928B2 - - Google Patents
Info
- Publication number
- JPH0132928B2 JPH0132928B2 JP5424082A JP5424082A JPH0132928B2 JP H0132928 B2 JPH0132928 B2 JP H0132928B2 JP 5424082 A JP5424082 A JP 5424082A JP 5424082 A JP5424082 A JP 5424082A JP H0132928 B2 JPH0132928 B2 JP H0132928B2
- Authority
- JP
- Japan
- Prior art keywords
- samples
- weight
- counting
- additional
- counted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000523 sample Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
- G01G19/42—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight for counting by weighing
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Measurement Of Radiation (AREA)
Description
【発明の詳細な説明】
本発明は試料重量を平均試料重量で除算して試
料個数を演算計数する電子はかりに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic scale that calculates the number of samples by dividing the sample weight by the average sample weight.
計数はかりによる多数試料の計数に際して生ず
る誤差は、はかり自体の誤差によるものと、計数
すべき試料の個々の重量のばらつきによるものと
がある。このうち、後者による誤差を最小限に抑
えるため、従来は、基準とすべき平均重量を、試
料を追加計数する毎に、その総個数により順次補
正して行く方式（特開昭53−141072）や、この平
均重量補正時に仮平均重量と平均重量を比較し、
所定の精度内で両者が一致するか否かを判定し、
一致しない場合には警告信号が発せられる方式
（特開昭56−70421）の計数はかりが採用されてい
る。しかしこのような方式では、追加秤量計数時
の追加試料個数が多すぎると、仮平均値で秤量値
を除して得た個数値に、丁度整数に近い誤差を含
む場合があり、この場合には１以上の誤差の含ま
れる可能性がある。このような場合計数個数値の
１未満の端数にどのような「丸め」操作を行うこ
とも、また、仮平均重量と平均重量との差の一致
性を検討することも無意味になり、誤差を検出す
ることはできない。したがつて、このようにして
得られた値に基づいて平均重量を補正して行つて
も計数誤差を防ぐことはできない。 Errors that occur when counting multiple samples using a counting scale include errors in the scale itself and variations in the individual weights of the samples to be counted. In order to minimize the error caused by the latter, the conventional method is to correct the average weight, which should be the standard, according to the total number of samples each time an additional sample is counted (Japanese Patent Application Laid-Open No. 141072-1982). Or, when correcting this average weight, compare the temporary average weight and the average weight,
Determine whether the two match within a predetermined accuracy,
A counting scale (Japanese Unexamined Patent Publication No. 70421/1983) that issues a warning signal if they do not match is used. 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 weighed value by the temporary average value may contain an error close to an integer. may contain one or more errors. In such a case, it is meaningless to perform any kind of "rounding" operation on the fractions less than 1 of the counted number, or to examine the consistency of the difference between the tentative average weight and the average weight, and errors may occur. cannot be detected. Therefore, even if the average weight is corrected based on the value obtained in this way, counting errors cannot be prevented.
本発明は、上記のような計数方式上の不備を除
去し、各計数時に１以上の誤差が生じないよう誤
差の発生を制御した計数はかりの提供を目的とし
ている。 The present invention aims to eliminate the above-mentioned deficiencies in the counting method and to provide a counting scale that controls the occurrence of errors so that one or more errors do not occur during each count.
本発明は、試料重量のばらつき範囲を示す量を
パラメータとし、既計数試料個数の関数として予
め計算された、所定の計数誤差で追加計数可能な
許容最大試料追加個数を記憶するメモリと、上記
許容最大試料追加個数未満の試料が追加されたと
きに限り、総重量を総個数で除して上記基準重量
の値を補正する手段を有する。 The present invention includes a memory that stores the maximum allowable additional number of samples that can be additionally counted with a predetermined counting error, which is calculated in advance as a function of the number of samples that have already been counted, using a quantity that indicates the range of variation in sample weight as a parameter; Only when less than the maximum number of additional samples is added, there is a means for correcting the value of the reference weight by dividing the total weight by the total number of samples.
以下本発明の実施例を説明する。 Examples of the present invention will be described below.
第１図は本発明実施例のブロツク図である。図
において電子はかり部１は、その皿上の荷重をデ
イジタル信号化して出力する。CPUは演算用各
種レジスタ、演算器、クロツク信号発生器等を内
蔵し、バスラインを通じて各周辺装置を制御して
いる。ROMにはプログラムが記憶されており、
RAMは測定値および演算値等を一時的に記憶す
る。これらCPU、ROM、RAMおよびバスライ
ンはマイクロコンピユータ２を構成している。キ
ーボード３は数値キー、基準メモリ・キー、平均
更新キー、風袋引キーおよび平均クリア・キーを
備えている。表示部４は演算結果等の数値を表示
し、警告表示部５は追加試料ののせ過ぎを警告す
る。 FIG. 1 is a block diagram of an embodiment of the present invention. In the figure, an electronic scale section 1 converts the load on the pan into a digital signal and outputs it. The CPU contains various registers for calculations, arithmetic units, a clock signal generator, etc., and controls each peripheral device through the bus line. Programs are stored in ROM,
The RAM temporarily stores measured values, calculated values, etc. These CPU, ROM, RAM, and bus line constitute the microcomputer 2. The keyboard 3 includes numeric keys, a reference memory key, an average update key, a tare key, and an average clear key. The display section 4 displays numerical values such as calculation results, and the warning display section 5 warns against overloading of the additional sample.
次に本実施例による試料計数手順を説明する。
先づ最初、予め定められた個数n1、例えば５個を
電子はかりの皿に載せ、基準メモリ・キーを押す
と、この重量を５で除した第１の仮平均値m1が
算出されRAMに記憶される。一方表示部４の第
１の表示器には計数試料個数５が表示される。こ
の個数５に対応して、予めROMに記憶されてい
る許容最大試料追加個数の曲線より、許容最大試
料追加個数１６が表示部４の第２の表示器に表示
されると共に、RAMに記憶される。なお、上記
許容最大試料追加個数の曲線については後述す
る。次にこの表示に基づいて16個以下の個数、例
えば15個の試料をはかり皿に追加し、キーボード
３の平均更新キーを押す。第１の表示器には試料
総個数20が表示されると共に、ROMに記憶され
ている曲線から、この総個数20に相当する次回の
最大許容試料追加個数29が第２の表示器に表示さ
れ、RAMの記憶は16から29に更新される。以
下、所望の総計数個数を計数し終るまで、同様の
過程を繰り返す。警告表示部５は、試料の追加個
数が最大許容試料追加個数に所定の個数を超えて
近づくと、その第１の警告灯が点灯して許容最大
試料追加個数に近いことを知らせ、試料追加個数
が許容最大試料追加個数を過ぎると第２の警告灯
が点灯して“はかり過ぎ”を警告する。第２の警
告灯が点灯すれば、平均更新キーが作動しないよ
うになつており、誤つた個数で平均値の補正が行
われるのを防いでいる。処で、上記ROMに記憶
されている許容最大試料追加個数N′は次式
N′＝（１／6Cv）2・Ｎ／Ｎ＋N′ …(1)
但し、Ｎ＝既計数試料個数
Cv＝試料重量の変動係数
より求めた値であり、本実施例ではCvに0.02を採
用している。またこの式によれば計数誤差が1/2
個未満となる確率は99.7％である。第２図におい
て上式のＮとN′の関係をグラフに示す。 Next, the sample counting procedure according to this embodiment will be explained.
First, place a predetermined number n 1 , for example, 5 pieces, on the pan of an electronic scale and press the reference memory key.The first temporary average value m 1 is calculated by dividing this weight by 5 and is stored in the RAM. is memorized. On the other hand, the number of counted samples, 5, is displayed on the first display of the display section 4. Corresponding to this number 5, the maximum allowable additional sample number 16 is displayed on the second display of the display unit 4 based on the curve of the allowable maximum additional sample number stored in the ROM in advance, and is also stored in the RAM. Ru. Note that the curve for the maximum allowable additional number of samples will be described later. Next, based on this display, add 16 or less samples, for example 15 samples, to the weighing pan, and press the average update key on the keyboard 3. The first display displays the total number of samples, 20, and the second display displays the next maximum allowable additional number of samples, 29, which corresponds to this total number of 20, based on the curve stored in the ROM. , RAM memory is updated from 16 to 29. Thereafter, the same process is repeated until the desired total number of pieces has been counted. When the number of samples to be added approaches the maximum allowable number of samples to be added by more than a predetermined number, the warning display unit 5 lights up the first warning light to notify that the number of samples to be added is close to the maximum allowable number of samples to be added. When the maximum number of samples to be added exceeds the allowable maximum number, a second warning light lights up to warn of "over-weighing." When the second warning light lights up, the average update key is disabled, which prevents the average value from being corrected due to an incorrect number of values. The maximum allowable additional sample number N' stored in the ROM is the following formula: N'=(1/6Cv) 2・N/N+N'...(1) However, N=Number of already counted samples Cv=Sample weight This value is obtained from the coefficient of variation of Cv, and in this embodiment, 0.02 is used for Cv. Also, according to this formula, the counting error is 1/2
The probability that it will be less than 99.7% is 99.7%. In FIG. 2, the relationship between N and N' in the above equation is shown in a graph.
上記(1)式は、以下に示す通り導かれる。 The above equation (1) is derived as shown below.
今、試料重量のばらつきの標準偏差をSDとし、
Ｎ個の試料の平均重量を求めると、求められた平
均重量の真の平均重量からのずれは、確率99.7％
（従つて3SD）のもとに、
で表される。これを基準としてN′を計数すると、
N′の試料の計数時において重量単位で次の誤差
が生じる。 Now, let SD be the standard deviation of the variation in sample weight,
When the average weight of N samples is calculated, the deviation of the calculated average weight from the true average weight is with a probability of 99.7%.
(hence 3SD) under It is expressed as If we count N′ based on this, we get
When counting N' samples, the following error occurs in weight units:
一方、N′の試料を皿上に載せたとき、その平
均重量は真の平均重量に対して、
だけずれている。従つてそのトータルの重量の誤
差は、
となる。 On the other hand, when N' samples are placed on a plate, their average weight is compared to the true average weight. It's off by just that. Therefore, the error in the total weight is becomes.
(2)式と(3)式の統計的加算値が平均重量の1/2
以下であれば計数誤差が生じない。従つて、
を満足するN′が計数誤差を生じない追加個数の
上限値であり、これを変形すると前記した(1)式が
得られる。ただし、変動係数Cvは、
で表される。 The statistical addition value of equations (2) and (3) is 1/2 of the average weight
If it is below, no counting error will occur. Therefore, N' that satisfies the above is the upper limit of the number of additions that does not cause a counting error, and by transforming this, the above-mentioned equation (1) can be obtained. However, the coefficient of variation Cv is It is expressed as
なおROMには異なるCvに対して上式の関係を
記憶させておき、計数すべき試料の重量変動係数
に応じて適宜Cvを選択できるようにすることも
できる。 Note that it is also possible to store the relationship of the above formula for different Cvs in the ROM so that the Cv can be appropriately selected according to the weight variation coefficient of the sample to be counted.
次に、第３図に示すプログラムのフローチヤー
トに基づいて本実施例の作用を説明する。なお、
本実施例におけるRAMには、はかりの皿に載つ
ている試料個数を記憶するレジスタＮ、最大許容
試料追加個数を記憶するレジスタN′、仮平均重
量を記憶するジスタＭ、追加された試料個数を記
憶するレジスタＸ、が設けられている。 Next, the operation of this embodiment will be explained based on the program flowchart shown in FIG. In addition,
The RAM in this embodiment includes a register N that stores the number of samples placed on the balance pan, a register N' that stores the maximum allowable additional number of samples, a register M that stores the temporary average weight, and a register M that stores the number of added samples. A register X for storing is provided.
最初、ステツプ１１において第１の表示器は、
はかりの皿に載つている試料個数ゼロを、第２の
表示器は所定の秤量個数n1、例えば５を表示して
いる。はかりの皿にn1個の試料を載せると、ステ
ツプ１２においてn1個の試料の平均重量（第１の
平均重量）m1が算出され、それがレジスタＭに
格納されると共に、ROMに記憶されている許容
最大試料追加個数の曲線によりn1に対応する
N′が捜し出され、レジスタN′に記憶される。な
お第１の表示器にはn1が、第２の表示器には
N′が表示される。次に、このN′以下の個数をは
かりの皿に追加すれば、ステツプ１３において追
加個数Ｘが算出され、第１の表示器に合計個数n1
＋Ｘが表示される。追加個数がN′を超えていれ
ば第２の警告灯が点灯して（ステツプ１４）警告
が発せられ、追加個数がN′以下で、かつ、予め
定められた所定の個数Ｑを超えてN′より小さく
ない場合には、第１の警告灯が点灯し、追加され
た個数がN′に近いことを知らせると共に、補充
追加により追加個数がN′を超えないよう計数者
に警告する。第２の警告灯が点灯したとき以外
は、平均更新キーを操作することにより、ステツ
プ１５で試料総重量がW1からW2に変更された
上、演算過程はステツプ１２の前段、「Ｎ＝n1」
のステツプに戻り、希望試料個数を計数するま
で、以下同じ過程をくり返す。 Initially, in step 11, the first display is
The second display shows a predetermined number n 1 of samples to be weighed, for example, 5, while the number of samples on the balance plate is zero. When n 1 samples are placed on the balance pan, the average weight (first average weight) m 1 of the n 1 samples is calculated in step 12, and it is stored in register M and also stored in ROM. corresponds to n 1 according to the curve of the maximum allowable additional sample number.
N' is located and stored in register N'. Note that n 1 is displayed on the first display and n 1 is displayed on the second display.
N' is displayed. Next, if the number of items equal to or less than this N' is added to the scale pan, the additional number X is calculated in step 13, and the total number n 1 is displayed on the first display.
+X is displayed. If the number of additional pieces exceeds N', the second warning light lights up (step 14) and a warning is issued. If the number is not smaller than 'N', the first warning light lights up to inform that the number of added pieces is close to N', and to warn the counter so that the number of pieces added does not exceed N' due to replenishment. Except when the second warning light lights up, the total sample weight is changed from W 1 to W 2 in step 15 by operating the average update key, and the calculation process is changed to "N= n1 ”
Return to step 1 and repeat the same process until the desired number of samples is counted.
以上のように、本発明によれば、試料重量の変
動係数に応じて順次指示される、所定の確率で誤
差ゼロの計数を可能とする最大許容試料追加個数
以下の試料を追加計数することにより、所望個数
の試料を、誤差なしに計数することができる。な
お、計数値にある程度の誤差を許す場合には、上
記のＮとN′の関係は第２図のような曲線とせず、
近似的な折線グラフとすることも可能である。ま
た、平均更新キーの操作は自動化することができ
る。この場合には、最大許容試料追加個数以下の
試料が追加されたときに限り重量値が安定したか
どうか判定し安定したときに自動的に更新する。
安定の判定には予め定められた時間内に重量値が
決められた範囲以上変らなければ安定と判断す
る。 As described above, according to the present invention, by additionally counting samples that are less than or equal to the maximum allowable additional sample number that enables counting with zero error with a predetermined probability, which is sequentially instructed according to the coefficient of variation of the sample weight. , a desired number of samples can be counted without error. Note that if a certain amount of error is allowed in the counted values, the relationship between N and N' above should not be a curve as shown in Figure 2.
It is also possible to use an approximate line graph. Additionally, the operation of the average update key can be automated. In this case, it is determined whether the weight value has stabilized only when the number of samples equal to or less than the maximum allowable number of additional samples has been added, and when the weight value has stabilized, it is automatically updated.
Stability is determined if the weight value does not change by more than a predetermined range within a predetermined time.
第１図は本発明実施例のブロツク図、第２図は
既計数試料個数と許容最大試料追加個数との関係
を示すグラフ、第３図は本発明実施例に採用した
ROMのプログラムを示すフローチヤート図であ
る。
１…電子はかり部、２…マイクロコンピユー
タ、３…キー・ボード、４…表示部、５…警告表
示部、１１〜１５…フローチヤートのステツプ。
Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a graph showing the relationship between the number of already counted samples and the maximum allowable additional number of samples, and Fig. 3 is a graph showing the relationship between the number of samples already counted and the maximum allowable additional number of samples.
FIG. 3 is a flowchart showing a ROM program. DESCRIPTION OF SYMBOLS 1...Electronic balance part, 2...Microcomputer, 3...Keyboard, 4...Display part, 5...Warning display part, 11-15...Steps of flowchart.
Claims (1)
で除して個数を演算する電子計数はかりにおい
て、試料重量の変動係数をパラメータとする、既
計数試料個数と、所定の計数誤差で追加計数可能
な許容最大試料追加個数との間の所定の関数関係
を記憶するメモリを設け、上記許容最大試料追加
個数未満の試料が追加されたときに限り、総重量
を総個数で除して上記基準重量の値を補正してゆ
くことを特徴とする電子計数はかり。1. In an electronic counting scale that calculates the number of samples by dividing the weight of the sample to be counted by a predetermined reference weight, it is possible to perform additional counting based on the already counted number of samples and a predetermined counting error, using the coefficient of variation of the sample weight as a parameter. A memory is provided to store a predetermined functional relationship between the maximum allowable number of additional samples, and only when less than the maximum allowable additional number of samples is added, the total weight is divided by the total number and the above reference weight is calculated. An electronic counting scale characterized by correcting the value of.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5424082A JPS58171629A (en) | 1982-03-31 | 1982-03-31 | electronic counting scale |
| US06/479,338 US4493384A (en) | 1982-03-31 | 1983-03-28 | Electronic counting scale |
| DE8383301798T DE3377162D1 (en) | 1982-03-31 | 1983-03-30 | Electronic counting scale |
| EP83301798A EP0091274B1 (en) | 1982-03-31 | 1983-03-30 | Electronic counting scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5424082A JPS58171629A (en) | 1982-03-31 | 1982-03-31 | electronic counting scale |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58171629A JPS58171629A (en) | 1983-10-08 |
| JPH0132928B2 true JPH0132928B2 (en) | 1989-07-11 |
Family
ID=12965012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5424082A Granted JPS58171629A (en) | 1982-03-31 | 1982-03-31 | electronic counting scale |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58171629A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6085333A (en) * | 1983-10-17 | 1985-05-14 | Shimadzu Corp | Electronic counting scale |
-
1982
- 1982-03-31 JP JP5424082A patent/JPS58171629A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58171629A (en) | 1983-10-08 |
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