JP4825907B2 - Electronic scale and instrument difference inspection program - Google Patents

Description

  The present invention relates to an electronic balance such as an electronic fee scale and a weighing label issuing device, and an instrument difference inspection program for the balance.

  An electronic scale used for weighing an article changes its measured value when the gravitational acceleration changes. On the other hand, the gravitational acceleration is slightly different depending on the location on the earth due to the centrifugal force accompanying the rotation of the earth. For this reason, when the same article is weighed at different locations, the measured values vary due to the gravitational acceleration at each location. Therefore, when installing an electronic balance, it is necessary to use a weight of the correct weight and calibrate it taking into account the gravitational acceleration at the installation location. Such calibration work is called instrumental error inspection.

  In this connection, each manufacturer divides the country into multiple regions according to the Japanese Measurement Law. And, for each use area, set the standard value of gravitational acceleration measured in that area in advance, and when performing an instrumental difference inspection of the electronic scale, add a correction value due to the difference between the gravitational acceleration of the inspection value Inspection is being conducted.

  For example, Patent Document 1 discloses that a gravitational acceleration standard value and a zip code are associated with each other, and by inputting the zip code of the place of use, the weight acceleration standard value of the region is stored in the control unit, and the instrumental error. An electronic balance that can be inspected is disclosed.

  However, even in one subdivided area, there is a difference in gravitational acceleration depending on the location. Therefore, when performing an instrumental difference inspection, calculate the value obtained by correcting the actual measured value with the upper limit value of the gravitational acceleration of the area, and the value corrected with the lower limit value. Is required to check whether or not is within an acceptable range.

  In a conventional electronic balance, these operations have to be performed manually. For this reason, a lot of labor and time are required for the instrumental error inspection.

  The present invention has been made based on such circumstances, and an object of the present invention is to provide an electronic balance capable of reducing the labor and time required for instrumental inspection.

  In order to achieve the above-described object, the present invention provides a gravitational acceleration range for a weight value measured by a scale from a lower limit value and an upper limit value of a gravitational acceleration range in an allowable use area and a gravitational acceleration at an inspection place. Correction value calculation means for calculating the value with the lower limit correction and the value with the upper limit correction of the gravitational acceleration range, and the lower limit correction of the gravitational acceleration range of the weight value calculated by the correction value calculation means The electronic scale is provided with a correction value display means for displaying the value obtained by adding the value and the value obtained by correcting the upper limit value of the gravitational acceleration range on the display unit.

  According to the present invention in which such a measure is taken, an electronic balance capable of reducing labor and time required for instrumental error inspection can be provided.

1 is an external perspective view of a weighing label issuing device according to an embodiment of the present invention. The block diagram which shows the circuit structure of the measurement label issuing apparatus. The schematic diagram which shows an example of the instrumental difference inspection mode screen displayed on the display of the measurement label issuing apparatus. The figure which shows the main memory areas formed in RAM of the measurement label issuing apparatus. The flowchart which shows the main process sequence of CPU when the instrumental difference inspection program mounted in the measurement label issuing apparatus starts.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In this embodiment, the electronic balance according to the present invention is applied to a weighing label issuing device.

  The external configuration of the weighing label issuing apparatus in the present embodiment is shown in the perspective view of FIG. 1, and the circuit configuration is shown in the block diagram of FIG. The weighing label issuing device includes a main body 1 incorporating a label printer 6, a keyboard 2 and a display 3 with a touch panel as input devices attached to the main body 1, and a load cell unit 4 for measuring the weight of an article such as a product. It has. A label issuing port 5 for issuing a label printed by the label printer 6 is formed on the front surface of the main body 1.

  In addition, the measurement label issuing device includes a central processing unit (CPU) 11 serving as the center of a computer, a read only memory (ROM) 12 and a random access memory (RAM) 13 constituting a main storage unit, and a hard disk (HDD). Drive) device 14, a communication interface 15, a keyboard controller 16, a touch panel controller 17, a display controller 18, a printer controller 19, a scale interface 20, and the like are built in the main body 1, and these are bus lines 21 such as an address bus and a data bus. Connected with.

  The keyboard controller 16 controls the keyboard 2 and captures key signals corresponding to the operation keys. The touch panel controller 17 controls the touch panel sensor 3A of the display 3 with a touch panel, and takes in the XY coordinate signal of the touched part. The display controller 18 controls the display unit 3B of the display 3 with a touch panel to display screen data. The printer controller 19 controls the label printer 6 to print label print data on a predetermined label sheet and issue it from the label issuing port 5.

  The scale interface 20 takes in the weight data measured by the load cell unit 4. The communication interface 15 manages data communication performed with an external device such as a host computer connected via a network. The HDD device 14 stores data files such as program files and master files.

  The measurement label issuing device having such a configuration has various operation modes such as a measurement label issue mode and an instrument difference inspection mode. These operation modes can be alternatively selected and executed from a menu screen displayed on the display 3 with a touch panel.

  The measurement label issuing mode is implemented as a standard function by an existing measurement label issuing device. That is, when a product specified by the product code input via the input device of the keyboard 2 or the touch panel display 3 is weighed by the load cell unit 4, the price is calculated from the unit price and weight of the product, and the product name In this mode, the label printer 6 issues labels printed with unit price, weight, price, and the like. The unit price and product name of the product are stored in the product master file on the HDD device 14 in association with the product code for specifying the product.

  The instrument difference inspection mode is a mode for performing instrument inspection, that is, an inspection for calibrating the weighing function of the measurement label issuing device in consideration of the gravitational acceleration at the installation location. When the instrumental error inspection mode is selected from the menu screen, the instrumental error inspection program is activated. The instrumental error inspection program is recorded in advance in the HDD device 14 or the ROM 12.

  When the instrumental error inspection program is started, the CPU 11 starts an instrumental error inspection process according to the program shown in the flowchart of FIG. First, as ST (step) 1, the instrumental difference inspection screen 30 is displayed on the display unit 3B (screen display control means).

As shown in FIG. 3, the instrumental difference inspection screen 30 displays a gravitational acceleration display column 31 that displays the magnitude of gravitational acceleration (m / s ² ) at the inspection location, a scale of the weighing label issuing device, that is, the load cell unit 4. Gravity acceleration range display fields 32 and 33 for displaying the lower limit value and the upper limit value of the size range of the gravitational acceleration (m / s ² ) in the area where it can be used, and the weight of the article weighed by the load cell unit 4 ( g) a weight value display field 34 for displaying a weight value, and a weight value display field for displaying a value (g) obtained by correcting the weight of the weighed article at the lower limit value of the gravitational acceleration range. 35 and an upper limit correction weight display field 36 for displaying a value (g) obtained by adding a correction at the upper limit of the range of the gravitational acceleration to the weight of the weighed article is arranged on the same screen. ing. Further, in particular, a lower limit correction weight display field 35 is arranged on one side (left side toward the screen) across the measurement value display field 34, and an upper limit value correction weight display is displayed on the other side (right side toward the screen). A column 36 is arranged.

  When the instrument difference inspection screen 30 is displayed, the CPU 11, as shown in FIG. 4, in step ST2, the gravity acceleration area A, the measurement value area B, the lower limit correction weight area C, and the upper limit correction weight area D of the inspection place. Are formed in the RAM 13 and the value of each area is initialized to “0”. Further, the gravity acceleration range lower limit value area E and the gravity acceleration upper limit value area F are formed in the RAM 13, and values set in advance in the scale are called from the HDD device 14 and stored.

  Next, the CPU 11 accepts an input of the gravitational acceleration of the inspection place as ST3 (gravity acceleration accepting means). This means is means for accepting that the gravitational acceleration display field 31 of the instrumental difference inspection screen 30 is touch-operated, and then numerical data corresponding to the gravitational acceleration at the inspection location is input by the numeric keypad of the keyboard 2. Alternatively, as disclosed in Patent Document 1, a master file in which the gravitational acceleration standard value and the postal code are associated with each other is stored in the HDD device 14 and the postal code of the inspection place is received. Means. When gravitational acceleration is input by the gravitational acceleration receiving means (YES in ST3), the CPU 11 stores the gravitational acceleration input value in the gravitational acceleration area A as ST4.

  Next, the CPU 11 determines whether or not the end of the instrumental error inspection is instructed as ST5. When termination is not instructed (NO in ST5), the CPU 11 takes in the weight data measured by the load cell unit 4 as ST6. Then, in ST7, it is determined whether or not the measurement value obtained from the weight data is “0”. When the measurement value is “0” (YES in ST7), the CPU 11 sets each value of the measurement value area B, the lower limit correction weight area C, and the upper limit correction weight area D to “0” as ST8. Then, the process returns to ST5, and it is determined again whether or not the end of the instrumental error inspection is instructed.

  On the other hand, when the measured value is not “0”, that is, when an article is placed on the load cell unit 4 and the weight of the article is measured (NO in ST7), the CPU 11 determines the measured value as ST9. Is stored in the measurement value area B.

  Next, the CPU 11 calculates the lower limit correction weight Wmin by the following arithmetic expression (1) as ST10. In ST11, the lower limit correction weight Wmin is stored in the lower limit correction weight area C.

Wmin = W + {(g1a-g2) / g2} * W (1)
However, W is a measured value, g1a is the value of the gravity acceleration range lower limit area E, and g2 is the gravity acceleration input value.

  Next, the CPU 11 calculates the upper limit correction weight Wmax by the following arithmetic expression (2) as ST12. In ST13, the upper limit correction weight Wmax is stored in the upper limit correction weight area D.

Wmax = W + {(g1b-g2) / g2} * W (2)
However, W is a measured value, g1b is the value of the gravitational acceleration range upper limit area F, and g2 is the gravitational acceleration input value.

  Here, the CPU 11 determines the weight value W measured by the load cell unit 4 from the lower limit value g1a and upper limit value g1b of the gravitational acceleration range in the allowable use area and the gravitational acceleration g2 at the inspection place by the processing of ST10 and ST12. Correction value calculation means for calculating a value obtained by adding a lower limit correction and a value obtained by adding an upper limit correction to the gravitational acceleration range. Note that the correction value calculation means may calculate a value obtained by previously correcting the upper limit value of the gravitational acceleration range, and then calculate a value obtained by adding the lower limit value correction.

  After calculating the value with the lower limit correction and the value with the upper limit correction calculated in this way, the CPU 11 stores the value of the measurement value area B in the display column 34 of the instrument difference inspection screen 30 as ST14. The value of the corrected weight area C is displayed in the display field 35 of the instrumental difference inspection screen 30, and the value of the upper limit value corrected weight area D is displayed in the display field 36 of the instrumental difference inspection screen 30 (correction value display means). Thereafter, the process returns to ST5, and it is determined again whether or not the end of the instrumental error inspection is instructed.

  The CPU 11 repeatedly executes the processing of ST6, 7, 8 or ST6, 7, 9-14 until the end of the instrumental error inspection is instructed. For example, when the end of the instrumental error inspection is instructed by operating the end key of the keyboard 2 (YES in ST5), the CPU 11 erases the instrumental error inspection screen 30 as ST15. This is the end of the instrumental error inspection program.

  As described above, in the weighing label issuing device of the present embodiment, when performing the instrumental error inspection at the place of use, the operator first selects the instrumental error inspection mode from the menu screen. Then, the instrumental difference inspection screen 30 is displayed on the display 3 with a touch panel. Next, the worker inputs the gravitational acceleration at the inspection location. Also, the gravity acceleration range lower limit value E and the upper limit value F are called. The gravity acceleration input value W, the gravity acceleration range lower limit value E, and the upper limit value F are displayed in the display fields 31, 32, and 33 of the screen 30.

  Next, the operator places a weight of a predetermined weight on the load cell unit 4. Then, the weight of this weight is measured, and the measured value is displayed in the display field 34. In the apparatus, the arithmetic expressions (1) and (2) are calculated to calculate the lower limit correction weight Wmin and the upper limit correction weight Wmax. The lower limit correction weight Wmin and the upper limit correction weight Wmax are displayed in a lower limit correction weight display field 35 and an upper limit correction weight display field 36 arranged with the measurement value display field 34 interposed therebetween.

Now, the gravitational acceleration input value W and 9.7975m / ^{s 2,} the lower limit g1a of the gravitational acceleration range and 9.796m / ^{s 2,} the upper limit value g1b and 9.799m / ^{s 2.} In this state, if a weight of 2 kg is placed on the load cell unit 4 and the measured value W is 2000.0 g, the lower limit correction weight Wmin is calculated as 19999.7 g by the above equation (1), and the upper limit correction The weight Wmax is calculated as 2000.3 g by the above equation (2). The lower limit correction weight Wmin = 19999.7 g and the upper limit correction weight Wmax = 2000.3 g are displayed on one screen with the measurement value W = 2000.0 g interposed therebetween.

  Incidentally, in the instrumental difference inspection for 2 kg, since it is regarded as normal within the range of ± 1.0 g, the operator can determine that the instrumental difference inspection for 2 kg is normal from the information on the screen. Thereafter, the operator appropriately replaces the weights having different weights, and repeats the necessary weight difference inspection.

  As described above, according to the present embodiment, since it is not necessary to manually calculate the lower limit correction weight Wmin and the upper limit correction weight Wmax necessary for the instrumental error inspection, the labor and time required for the instrumental error inspection are greatly reduced. Can be reduced. In addition, the lower limit correction weight Wmin and the upper limit correction weight Wmax are displayed on one screen with the weight measurement value W sandwiched between them, so this information can be confirmed at a time by loading and unloading a series of weights. The determination of the instrumental error inspection result can be easily performed in a very short time.

  The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage.

  For example, in the embodiment described above, the display boxes 35 and 36 for the lower limit correction weight Wmin and the upper limit correction weight Wmax are arranged on the right and left sides of the measurement value W display section 34 on the instrument difference inspection screen 30, but the present invention is not limited to this. For example, the lower limit correction weight Wmin display field 35 may be disposed on the lower side of the weighing value W display field 34, and the upper limit value correction weight Wmax display fields 35 and 36 may be disposed on the upper side. In the instrument difference inspection screen 30, the display columns 31, 32, and 33 are not necessarily required and may be omitted as appropriate.

  Further, the electronic balance of the present invention is not limited to the weighing label issuing device of the above-described embodiment, and electronic balances such as an electronic fee scale in which upper and lower limits of the gravitational acceleration range of the allowable use range are set. Is applicable.

  In this embodiment, the case has been described in which the instrumental error inspection program which is a function for carrying out the invention is recorded in advance in the apparatus. However, the present invention is not limited to this, and the same function can be downloaded from the network to the apparatus. Alternatively, a device having the same function stored in a recording medium may be installed in the apparatus. The recording medium may be any form as long as the recording medium can store the program and can be read by the apparatus, such as a CD-ROM. In addition, the function obtained by installing or downloading in advance may be realized in cooperation with an OS (operating system) inside the apparatus.

  In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, the constituent elements over different embodiments may be combined.

  DESCRIPTION OF SYMBOLS 1 ... Measurement label issuing apparatus main body, 2 ... Keyboard, 3 ... Display with a touch panel, 4 ... Load cell unit, 11 ... CPU, 30 ... Instrument difference inspection screen.

Japanese Patent Laid-Open No. 2004-073310

Claims (6)

In an electronic scale comprising a scale part and a display part for displaying the weight value of an article weighed by the scale part,
From the lower limit value and upper limit value of the gravitational acceleration range in the allowable use area, and the gravitational acceleration of the inspection place, a value obtained by adding a lower limit correction of the gravitational acceleration range to the weight value measured by the scale unit, Correction value calculating means for calculating the value obtained by adding the upper limit correction of the gravitational acceleration range,
A correction value for causing the display unit to display a value obtained by adding a lower limit correction of the gravitational acceleration range of the weight value calculated by the correction value calculating means and a value obtained by adding an upper limit correction of the gravitational acceleration range. Display means;
An electronic balance characterized by comprising: Gravity acceleration accepting means for accepting an input of gravitational acceleration at the inspection location, and a storage unit for storing the gravitational acceleration accepted by the gravitational acceleration accepting means and the lower limit value and upper limit value of the gravitational acceleration range in the allowable use area; Further comprising
The correction value calculation means uses a gravitational acceleration stored in the storage unit, and adds a lower limit correction of the gravitational acceleration range stored in the storage unit to the weight value measured by the scale unit. The electronic balance according to claim 1, wherein a value obtained by adding an upper limit correction of the gravitational acceleration range is calculated.   The correction value display means displays a value obtained by correcting the lower limit value of the gravitational acceleration range on one side across the weight value displayed on the display unit, and an upper limit of the gravitational acceleration range on the other side. The electronic balance according to claim 1 or 2, wherein a value after value correction is displayed. On the display section, a display field of the inspection place gravity acceleration received by the gravity acceleration receiving means, a display field of the weight value measured by the scale section, and the gravity acceleration calculated by the correction value calculating means Screen display control means for displaying an instrumental difference inspection screen in which a value obtained by adding a lower limit correction of a range and a display column of a value obtained by adding an upper limit correction of the gravitational acceleration range are arranged on one screen;
The electronic balance according to claim 2, further comprising:   The instrument difference inspection screen has a display column for a value obtained by adding a lower limit correction of the gravitational acceleration range on one side with a display column for a weight value measured by the scale unit on the other side, and 5. The electronic scale according to claim 4, further comprising a display column for a value to which an upper limit correction of the gravitational acceleration range is added. An electronic scale comprising a scale part and a display part for displaying the weight value of an article weighed by the scale part,
From the lower limit value and upper limit value of the gravitational acceleration range in the allowable use area, and the gravitational acceleration of the inspection place, a value obtained by adding a lower limit correction of the gravitational acceleration range to the weight value measured by the scale unit, Correction value calculating means for calculating the value obtained by adding the upper limit correction of the gravitational acceleration range,
A correction value for causing the display unit to display a value obtained by adding a lower limit correction of the gravitational acceleration range of the weight value calculated by the correction value calculating means and a value obtained by adding an upper limit correction of the gravitational acceleration range. Display means;
Instrumental error inspection program to make it function.

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