JP2018200236A - Abnormality detection method of metal plate measured value in metal plate weight measuring system - Google Patents

Abstract

To provide an abnormality detection system of a metal plate measured value, which is, when the same weight value is consecutively generated, capable of detecting it as weighing abnormality.SOLUTION: Provided is a method for detecting abnormality of pile measured values in a carrying-out facility of metal plate piles, which comprises: conveyance means; pile lifting/lowering means; weighing means; and verification means. In this method, weight of each pile is measured twice when measuring two consecutive piles Gand Gin this sequence, so that pile weight data is obtained in the sequence of a measured pile weight value w, a re-measured pile weight value w, a measured pile weight value w, and a re-measured pile weight value w. Subsequently, a function of the verification means selects a combination of two kinds of measured pile weight values from the four kinds of measured pile weight values, obtains a difference between the selected two kinds of measured pile weight values, uses at least one kind of a differential value of the difference as a verification formula, in order to verify presence/absence of [abnormality of weighing means], and further stops the carrying-out facility in the case that abnormality is detected.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for detecting a measurement error (presence / absence) of a load pile in a step of transporting a load pile obtained by stacking a plurality of metal plates using a metal plate unloading facility with a weighing mechanism.

  Electro-copper and nickel produced by electrolytic refining (hereinafter collectively referred to as metal plates) are transferred from the production site to the storage location by the unloading equipment in a state in which a predetermined number of sheets are stacked (hereinafter referred to as cargo piles). It is transported and stored at the storage location for a period until shipment.

  By the way, this manufactured metal plate may contain defective products that are insufficient in weight, but it is very difficult to detect defective products after they are collected in the storage location. When it is transported by the transport conveyor, the presence or absence of defective products is determined. Specifically, in the unloading facility, the weight of the load pile is measured using a measuring device provided in the middle of the conveyor, and the presence / absence of a defective product is determined based on the weight.

A defective product often has an abnormality in shape, and a load pile in which defective products are mixed in stacked metal plates becomes bulky or collapses during transportation. Since the metal plate of the load collapsed load is often caught by other load peaks or peripheral devices during conveyance, erroneous measurement is prevented by measuring twice continuously (see Patent Document 1).
In addition, the height of the load mountain is measured while being conveyed by the conveyor, and the defective product is also determined by whether or not the load filling rate calculated from the height of the load mountain falls within a predetermined range. A presence / absence judgment is made. As a result, the load and the load filling rate are out of regulation, and after checking the weight and appearance, any defective metal plates included in the load are removed.

Conventionally, as a method for measuring the weight of a load mountain transported by a transport conveyor, a method of measuring the weight of the load mountain by lifting the load mountain from the transport conveyor (see Patent Document 2).
For example, when a transport conveyor having a pair of chains stretched in parallel in a state of being separated from each other is used, a measuring instrument is provided between the pair of chains. And the lifter which lifts a load mountain on this measuring instrument is installed. Then, if the load is lifted by the lifter, the load can be lifted from the pair of chains of the conveyor, so that the weight of the load is added only to the lifter (that is, only the measuring device). Therefore, the weight of the load can be measured by the measuring instrument.

  In the carry-out facility, the load weight value measured by the measuring instrument is transmitted to the control device, then processed as an electrical signal in the control device, and transmitted to the printing device and the product management system. For example, a programmable controller (PLC) is used for the signal processing of the control device, but if a weight value processing error occurs inside the programmable controller due to some reason, an incorrect weight value is printed. Since there is a possibility of being shipped as it is, a method for verifying the weight value handled by the control device has been demanded. For example, it can be prevented by detecting an abnormality based on the load filling rate as disclosed in Patent Document 3, but it has been required to find it earlier.

JP, 2006-102765, A JP-A-8-337232 Japanese Patent Laying-Open No. 2015-081766

  In view of the above circumstances, the present invention provides a metal plate measurement value abnormality detection system capable of detecting a measurement abnormality when the same weight value is continuously generated due to a processing error such as a program.

  The inventor has reviewed the operating principle of the control device, and the internal weight value is updated and transmitted every mountain. If this updating function is not activated or the updating function is delayed, the following is performed. It was discovered that the same weight value could be transmitted for Kazan. As a result of studying the countermeasures, it was noted that the probability that consecutive weights had the same weight value was extremely low, and when consecutive weights showed the same weight value, it was considered abnormal and the present invention was completed.

A first aspect of the present invention is a method for detecting an abnormality of a loaded mountain measurement value in a metal plate weight measuring system for measuring a loaded mountain weight in a loading facility for loading a pile of metal plates, wherein A flat part for placing a mountain is provided, the conveying means for carrying the load on the upper surface, and the state where the load is placed on the flat part, or the loaded load is floated from the flat part. The load mountain elevating means to be in a state and the load mountain elevating means using the load mountain elevating means are measured, and after measuring the weight of the float in the floated state to obtain a measured load mass weight value, A weighing unit for placing the mountain on the flat portion; and a verification unit for verifying the correctness of the obtained weight value of the measured load, and the verification unit uses the weighing unit to the mountain _{G N-1, G N,} be measured in the order of _{G N-1, G N} When performed weighed twice per Niyama, measured Niyama weight value w _N-1, remeasurement Niyama weight value w _{N-1 ^R,} measured Niyama weight value w _N, remeasurement Niyama weight value After obtaining the load weight data in the order of w _N ^R , between the two types of measured load weight values obtained by selecting a combination of two types of measured load weight values from the four types of measured load weight values. A metal plate having a function of verifying the presence or absence of "abnormality of the weighing means" using at least one kind of difference value due to the difference between them as a verification formula and stopping the carry-out facility when an abnormality is detected This is a method for detecting an abnormality in a load measurement value in a weight measurement system.

According to a second aspect of the present invention, the two types of measured loads obtained by the verification means according to the first aspect of the invention by selecting a combination of two types of measured load weight values from the four types of measured load weight values. Of the following six types of difference values due to the difference between the crest weight values, one type is selected from the difference values f _{1 to} f ₄ and one type is selected from the difference values h _{1 to} h ₂ and used as a verification formula. The present invention is a method for detecting an abnormality of a load measurement value in a metal plate weight measurement system, which has a function of verifying the presence or absence of "abnormality" and stopping the carry-out facility when "abnormality" is detected.

  In the third invention of the present invention, the verification formula in the second invention uses the following two types of difference values, and combines the results of the two types of difference values to verify the presence or absence of “abnormality of the weighing means”, A method for detecting an abnormality of a load measurement value in a metal plate weight measurement system, comprising a function of stopping the carry-out facility when an abnormality is detected.

  According to the abnormality detection system of the present invention, it is possible to detect erroneous weighing due to a processing error such as a program. Therefore, since it becomes easy to prevent the misweighed load mountain from being shipped, stable supply of the metal plate can be achieved.

It is a lineblock diagram of electric copper carrying out equipment X concerning the present invention. It is a load-carrying metering control flowchart according to the present invention. It is an external appearance side view of the electrolytic copper carrying-out equipment X which shows the conveyance form of a load mountain based on this invention.

FIG. 1 is a configuration diagram of an electrolytic copper carry-out facility X according to the present invention, FIG. 2 is a flowchart for loading and unloading weighing control according to the present invention, and FIG. The present invention will be described with reference to FIGS.
Electrolytic copper produced have been defined size, packing equipment 1 in stacked in prescribed number copper Niyama (FIG. 3, reference numeral G _1, · · ·, denoted by G _N, hereinafter referred to as "Niyama" Sometimes).
Usually, a load pile made by stacking metal plates is processed using a carry-out facility. As the unloading equipment, a transport means (A) for placing the load on the upper surface and sending the load continuously or intermittently, a lifting / lowering means for lifting the loaded load, B) is provided with weighing means (C) for measuring the weight of the lifted baggage, and is arranged as shown in FIG. 1, for example.
In this unloading facility, the load pile is, for example, a conveyor type like a conveyor 2 (see FIGS. 1 and 3) supported by a conveyor post 2a (see FIG. 3, not shown in FIG. 1) in FIG. The weight of the load mountain is measured by the load lifting / lowering means (B) and the weighing means (C) at the measurement position LM which is transferred using the transfer means and installed in the flat portion 3b provided in the middle of the transfer means. It is carried out.

The loading / unloading means (B) is performed by a push-up cylinder 3a that lifts the loading mountain placed at the weighing position LM from below and brings it into a floating state.
The weighing means (C) includes a weighing device 3 for weighing the load, a control device 4 for controlling each operation of weighing and conveying, a printing device 7 for printing the measurement result and other items on the load, and its printing. The printing apparatus controller 6 controls the apparatus.

In this weighing means (C), the Niyama once the weighing position LM is stopped, to obtain a measurement Niyama weight data d _W are metered by the metering device 3, the obtained measurement Niyama weight data d _W is controlled It is transmitted to the device 4 (for example, a programmable controller).
Incidentally, the control measurement Niyama weight data d _W transmitted device 4 is made verification measurement weight in the verification means (D) shown below, when the normal determination (pass) through the printer control section 6 It is sent as print Niyama weight data d _P to the printing device 7 (for example, an ink jet printing apparatus), to print the print Niyama weight data d _P sends the print position LP the Niyama.

Niyama completing the printing is carried out to the position LD out product through the standby position LW _2, it is transported to a storage location (not shown) by heavy for shipment piles 14 (e.g., a forklift).
On the other hand, a metering position LM or near (for example, the position and the printing device 7 immediately after) the Niyama height measured (e.g. by ultrasonic displacement meter), is transmitted to the control unit 4 Niyama as height data d _H. Niyama height data d _H is sent to the product management system 5, used in the shipping management together with the measurement Niyama weight data d _W.

<Verification means (D)>
In the electric copper carrying-out facility X shown in FIGS. 1 and 3, the load piles (reference symbols G ₁ ,..., G _N ,. After being placed on a certain conveyor 2, it moves by the conveyor 2 in the operating state, passes through the standby position LW ₁ , stops at the measuring position LM (above the flat portion 3 b), and uses the measuring device 3 ( The load weight is measured by C).
After weighing of Niyama, measured Niyama weight data d _W obtained is sent to the control unit 4 (e.g., a programmable controller), the acceptance judgment is made as being performed verifying means (D) shown in FIG.
If the verification unit (D) has made a determination normal, measured Niyama weight data d _W after being processed in the print Niyama weight data d _P, sent to the printer 7 via the printer control section 6, the metering The printing device 7 (for example, an inkjet printing device) prints on the load that has moved to the printing position LP later. In the case of an abnormality determination, an abnormality improvement process is performed to obtain a normal load weight, and the same processing as that of the normal determination is performed.

After the printing, the load is transported to the loading position LD through the standby position LW ₂ , and after confirming the printing state, the printing location, the printing contents, the loading shape, etc., the loading and unloading heavy machine 14 (for example, (Forklift) etc., it is shipped out to transportation means such as trucks. Further (after or in parallel), the next load pile is weighed and the same load weight determination is repeated.

  In the work of unloading and loading electrolytic copper using the electrolytic copper unloading facility X in FIGS. 1 and 3, the weight is measured while continuously or intermittently transporting a plurality of loads. In some cases, the weight data of the preceding load piles in the two adjacent copper load piles due to a measurement abnormality due to a shape disturbance such as collapse of the load piles, or a malfunction of the weighing means or control device, It has been difficult to detect a case in which there is a problem of being recognized and printed as the weight of a load mountain.

Therefore, in the present invention in which “loading mountains G _{1 to} G _{K to} G _N ” are conveyed and weighed in an arrangement as shown in FIG. 3, adjacent loading mountains are handled as a pair as shown in the control flow of FIG. . For example, “G ₁ and G ₂ ”, “G ₂ and G ₃ ”,..., “G _K-1 and G _K ”,..., “G _N-1 and G _N ” Set a pair.
First, in the weighing means (C), the weight of the preceding load mountain GN _-1 placed at the measurement position LM is measured to obtain “measured load mountain weight w _N-1 ”, and then the measurement is performed. The loaded mountain GN _-1 is lowered by the loaded mountain lifting means (B) and returned to the measuring position of the transfer device, and then the push-up cylinder 3a is raised again to float the loaded mountain above the transfer conveyor 2. Then, the weight of the load is re-measured by the measuring device 3 to obtain “re-measured load weight w _N-1 ^R ”, and is placed on the original weighing position LM.
Then, move the Niyama placed on the weighing position LM subsequent Niyama G _N, the then weighed Niyama weight to obtain a "measuring Niyama weight w _N", similar to the preceding Niyama G _N-1 The weight of the load is again measured to obtain “re-measured load weight w _N ^R ”.

At the time when each of the two weighings at the two loading hills is completed, a pass / fail judgment of the measured loading weight is made. In addition, if the conveyance conveyor 2 of a conveyance means (A) is stopped until a pass / fail determination is made (between weighing and pass / fail determination), a measure at the time of abnormality determination (failure) can be easily performed.
Acceptance judgment for Niyama weight _{w N} is obtained "measured Niyama weight _{w N-1, w N"} and "re-measurement Niyama weight ^{_{w N-1 R, w N}} R " four measurement weight values Are verified by the verification means (D). Specifically, if it is determined to be “abnormal” according to any of the following “mountain weight determination criteria I to II”, the abnormality is resolved in accordance with the prescribed “abnormality improvement procedure”. After that, the weight of the modified load is obtained by re-weighing, and the loading operation of the load is continued.
Hereinafter, a reference example for determining whether or not the load weight is acceptable in the present invention is described.

[Pass / fail judgment of measured load weight]
As a criterion for the pass / fail determination, for example, a load mountain weight determination criterion I or a load mountain weight determination criterion II described later can be used.
1. Cage weight criteria I
One of the pass / fail judgments of the measured load mass is that at least one of the difference values between the two measured load weight values among the four measured load weight values is used as a verification formula. The presence or absence of “abnormality of the weighing means” is verified, and when the verification formula detects an abnormality, the carry-out facility is stopped.
Specifically, from the four types of measured load weight values, as shown in the following (1) to (6), a difference value due to the difference between the two types of measured load weight values is obtained, and at least one type of the difference is obtained. Using the value in the verification formula, the correctness / incorrectness of the assumed load weight value is found, and a pass / fail decision is made.

In the following formulas (1) to (6), formulas (1) and (2) indicate the weight difference between “adjacent loads” and “measurement-re-measurement loads” (3) and Equation (4) indicates the difference in load weight between “adjacent loads”, and equations (5) and (6) indicate the difference in load weight between “same loads”.
At least one of these difference values is selected as the verification formula, and whether the result corresponds to any one of the “mountain weight determination criteria I” makes a correct / incorrect determination.

Moreover, in this criterion I, one or more types of difference values selected from the formulas (1) to (2) and one or more types selected from the formulas (3) to (6) from the above six types of difference values. It is desirable to combine the difference value into a verification formula.
Here, Δw _a and Δw _b are threshold values for determining acceptance / rejection determination, and are 0 or a positive value, Δw _a is a threshold value for determining acceptance / rejection measurement between adjacent loads, and Δw _b is between the same loads This is a threshold value for determining whether the measurement is acceptable or not.

[Delta] w _a, if a positive value, in the measurement weight value meter 3 or the control unit 4 in the above step size at the time of internal processing, it is preferable to a measurement error or less become the value of the measuring instrument 3. When Δw _b is a positive value, it is preferable to set it to a value that is not less than the measurement error of the measuring instrument 3 and not more than the weight of one metal plate.
For example, the weight of one metal plate is often produced with a target of 80 kg, 90 kg, 150 kg, 170 kg, etc., and a measuring instrument with a tolerance of 1 kg is generally used for the measuring instrument 3, so that Δw _a , Δw Both _b can be normally set to 1.0 [kg]. The difference in individual weight of each metal plate is much larger than the measurement error of the measuring instrument 3, and the difference in weight due to the collapse of the load is much larger than the measuring error of the measuring instrument 3, so that the incidence of misjudgment is suppressed to a very low level. Yes.

2. Cage weight criteria II
Next, by using any two of the above formulas (1) to (6) in combination, it is possible to detect and detect abnormalities caused by "abnormality of load mountain shape" or "malfunction of measuring means". An example of determination criteria will be described.
In this standard, the “loading weight determination criterion II” shown in the following Table 1 is used in which the difference value represented by the following formulas (1) and (5) is a verification formula. In addition, the condition in [] in the table represents an abnormal state.

“| W _N −w _N ^R | (repetitive weighing of the same load mountain) constituted by the obtained measured load weights w _N-1 and w _N and the remeasured load weights w _N-1 ^R and w _N ^R Error) ”and“ | w _N −w _N−1 ^R | (metric difference between adjacent loads with remeasurement) ”are used as determination parameters. Since Δw _a and Δw _b are the same as the load weight determination criterion I, description thereof will be omitted.
Type P ₁ of Table 1 is a state there was no abnormality in Niyama form to metering means (C) those corresponding to "normal" determination, P ₂ and later, the weighing means (C), Niyama form Is a state in which some kind of abnormality has occurred, and is an “abnormal” determination.

Type P ₂ is per abnormally, the Niyama G _N of the apparent weight w _N, a case which indicates that the anomaly of Niyama form occurs, can be detected with conventional methods of measuring the Niyama weight twice is there.

Type P ₃ be construed per abnormally, weight difference Niyama neighboring indicating abnormality, the case of "malfunction of the metering means" equal Niyama weight of two mountains adjacent substantially ([Delta] w _a or below) Two states are included, and in the latter case, weighing is performed normally. To distinguish between these two states, the Niyama weight anew Niyama G _N, or the metering means used to meter in another metering means independent, weighed such as by measuring a third Niyama It is effective to measure again after changing the value. This abnormality is a kind of abnormality that cannot be detected by the conventional method.

The type P ₄ is a case where an abnormality is detected due to an “abnormal operation of the weighing means”. Even in the conventional method, this abnormality can be detected, but it cannot be determined whether there is an abnormality in the load mountain form or a malfunction of the measuring means.

  As shown in Table 1, according to the present invention, by measuring the weight of one load mountain twice, it is possible to detect a load failure due to “abnormality of load mountain shape” in “anomaly of weighing”, and further adjacent to each other. By combining the comparison of the weights of the loads, it is possible to detect an abnormality in the weight data due to “a malfunction of the weighing means”.

EXAMPLES Hereinafter, an Example is shown and this invention is demonstrated in detail.
In order to confirm the effect of the “verification means” according to the present invention, a weighing test of a load mountain for weight measurement was performed using the electrolytic copper unloading facility X of FIG. In accordance with the “criteria for determining the weight of a load mountain II”, whether or not the weight of the load was measured was determined. The thresholds Δw _a and Δw _b that influence the determination were set to Δw _a = Δw _b = 1 kg.

There are four types of used loads: No. 101, No. 2 with a weight of 2635 kg, No. 102 with a No. 2658 kg, No. 103 with a No. 2817 kg, No. 104 with a No. 2620 kg. The weight difference between No. 101 and No. 104 is 1 kg or more when weighed in this order.
In addition, the weighing of the load mountain is in the order of measurement shown in Table 3 below, in the order of the load mountain 101, 101 ^R , 102, 102 ^R , 103, 103 ^R , 104, 104 ^{R from} the top. Measurement is to be carried out (the superscript R means the second measurement). Furthermore, verification decided to catch the abnormality between No. 102 and No. 103.
Here, Niyama Niyama _{G N-1} to No. 102, have gone to resemble the a Niyama 103rd Niyama _{G N.} In addition, the true weight of the load mountain is a measured value obtained by weighing each load mountain individually.

Tables 4 to 9 show the measurement order and measurement results of Examples 1 to 4, Comparative Example 1, and the conventional example.
In these tables, “solid arrow” indicates the order of measurement, and verification was performed using the measurement values on both sides of the solid arrow.

As Example 1, a weighing test was performed in which the weights of No. 101 to No. 104 were measured in the order of No. 101 to No. 104. As shown in Table 4 below, the weighing results of each load weight were obtained.
The result, combined light of the "Niyama weight criteria II" in Table 1, was in a state "normal P _1".

As Example 2, a weighing test was performed assuming that the weighing means malfunctioned during the initial weighing of No. 103, and that the measured value was inherited during remeasurement. That is, the weight value of the first time and remeasurement of Niyama 103rd was temporarily write inhibit the programmable controller of the memory to indicate w _102. As shown in Table 5 below, the weighing results of each load weight were obtained.
The result, combined light of the "Niyama weight criteria II" in Table 1, a state "abnormality P _3", it is detected that the "malfunction of the metering means" has occurred.

Note that this "anomaly of P _3", since the weight difference of Niyama neighboring shows the abnormality, the "case of error operation of the metering means" Niyama weight of two mountains which "adjacent approximately equal Two cases of “when (Δw _a or less)” are included, and in the latter case, the measurement is normally performed.
To distinguish between these two states, the Niyama weight again Niyama C _N, although other verification means such as the metering means used to measure in a different metering means independent is desired, this abnormal Was a kind of abnormality that could not be detected by the conventional method.

As Example 3, a weighing test was performed on the assumption that the weighing means malfunctioned at the time of initial weighing of No. 103 as in Example 2, and at the time of re-weighing of No. 103, No. 2 was different from Example 2. In this case, “w ₁₀₃ ” which is the true weight value of No. ₁₀₃ is weighed. That is, the first calibration value of Niyama 103rd indicates w _102, during re-weighed and temporarily write inhibit the programmable controller of the memory so as to meter the w ₁₀₃ true weight value. As shown in Table 6 below, the weighing results of the load weights were obtained.
The result, combined light of the "Niyama weight criteria II" in Table 1, a state "abnormality P _4", No. 102 Niyama adjacent, there is no difference in weight between the 103rd states, and Niyama Two abnormalities were detected in which the measurement results of No. 103 were different.

Thus, by verifying the two conditions of the presence / absence of an abnormality between adjacent loads and the presence / absence of an abnormality between two measurements of the same load, an abnormality can be detected as in the third embodiment. Even when the “mountain configuration” is in a normal state, an abnormal state due to “a malfunction of the weighing means” can be detected as in the second embodiment. That is, “f ₁ = | w _N −w _N−1 ^R | −Δw _a ” by the adjacent load mountain accompanied by remeasurement satisfies the condition of “f ₁ ≦ 0”. It was determined that the abnormal state was caused by “operation”.

As Example 4, a measurement test was performed on the assumption that an abnormality in the load mountain shape was detected. That is, at the time when the first measurement of No. 103 is completed, the top one of No. 103 is moved so as to rest on the side of No. 103 from the outside of the measuring instrument. The second measurement (namely, No. 103 ^R ) of No. 103 was performed. As a result, the weighing result of each load weight as shown in Table 7 below was obtained.
In the light of this result to Niyama weight criterion II of Table _{1, h 1 = | w 103} -w 103 R | -Δw 2 = | 2817kg-2783kg | because it is -1 kg> 0, the _{"P 2} abnormality ”Detected.

(Conventional example 1)
As a conventional example, except that the conventional standard is used instead of the standard for determining the load mass according to the present invention, the same results as in Example 2 are obtained. It was. The conventional standard is common to the load mountain weight determination standard II in that the weight weighed repeatedly is used, but is different from the load mountain weight determination standard II in that the adjacent load mountains are not verified.
As a result, it was not possible to detect “malfunction of the weighing means” caused by the malfunction of the calibration means.

(Conventional example 2)
In the conventional method in which each load is measured only once, the memory of the programmable controller is temporarily prohibited from being written as in Example 2, and the weighing test is performed. Since it was not accurately weighed and there was no verification means, it was not possible to detect malfunction of the weighing means.
Table 9 below shows the measurement results.

DESCRIPTION OF SYMBOLS 1 Packing equipment 2 Conveyor 2a Conveyor support | pillar 3 Weighing machine (main body)
3a Push-up cylinder 3b Flat part 4 Control device 5 Product management system 6 Printing device control unit 7 Printing device 14 Heavy loading machine LW ₁ , LW ₂ Standby position LM Weighing position LP Printing position LD Shipping position (A) Conveying means (A) B) Loading / lifting means (C) Weighing means (D) Verification means X Copper unloading equipment d _W measured loading weight data d _H loading height data d _P printing loading weight data

Claims (3)

A method for detecting an abnormality of a load mountain measurement value in a metal plate weight measurement system for measuring a load weight of the load mountain in an unloading facility for a load mountain in which metal plates are stacked,
A transport unit that includes at least a flat portion on which the mountain is placed, and transports the mountain on an upper surface;
A state of placing the load mountain on the flat part, or a load mountain elevating means for bringing the loaded load mountain in a state of floating from the flat part,
A state where the load is lifted using the load lifting mechanism, and the weight of the lifted load is measured to obtain a measured load weight value, and then the load is placed on the flat portion. Weighing means to
Verification means for verifying the correctness of the obtained measured load weight value,
The verification means, using said weighing means, the two continuous Niyama G _N-1, G _N, when measuring in _the order _{of G N-1,} G _N, performs a weighing twice per Niyama Measured load weight value w _N-1 , Remeasured load weight value w _N-1 ^R , Measured load load weight value w _N , Remeasured load load weight value w _N ^R , Using at least one of the difference values due to the difference between the two types of measured load weight values obtained by selecting a combination of the two types of measured load weight values from the four types of measured load weight values as a verification formula A method for detecting an abnormality in a weight measurement value in a metal plate weight measuring system, comprising: a function of verifying the presence or absence of “abnormality of weighing means” and stopping the carrying-out facility when an abnormality is detected. The verification means selects the combination of two kinds of measured load weight values from the four kinds of measured load weight values, and the following six kinds of difference values according to the difference between the two kinds of measured load weight values. Out of
When one type is selected from the difference values f _{1 to} f ₄ and one type is selected from the difference values h _{1 to} h ₂ and used as a verification formula to verify the presence or absence of “abnormality of the measuring means” and detect “abnormal” The method for detecting an abnormality of the load measurement value in the metal plate weight measurement system according to claim 1, further comprising a function of stopping the carry-out facility.

The following two types of difference values are used as the verification formula, and the result of the two types of difference values is combined to verify the presence or absence of “abnormality of the weighing means”, and when the abnormality is detected, the function of stopping the carry-out facility is provided. The method for detecting an abnormality of a load measurement value in the metal plate weight measurement system according to claim 1, comprising:

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