JP2002277315A - Scale device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a setting work of gravitational acceleration information. SOLUTION: A correction value table for storing correlatively correction value information for correcting the weight in a district corresponding to the gravitational acceleration relative to each district information in plural districts determined by dividing the face of the earth is provided, and the correction value information corresponding to the district in a map M is acquired on reference to the correction value table based on the touch position on a touch panel 6 operated in the state where display data for showing the map M are displayed on a display part 5, and the load applied to a load cell unit corresponding to an electric signal outputted from the load cell unit is calculated based on the acquired correction value information. Hereby, an operator can acquire the correction value information by looking at the map M and touching the pertinent district.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weighing apparatus having a load cell unit for outputting an electric signal according to an applied load.

[0002]

2. Description of the Related Art Conventionally, a load cell unit for outputting an electric signal according to an applied load is provided, and data calculated based on the electric signal output from the load cell unit is obtained as the weight of a subject. There is a weighing device.

[0003] Due to the principle of calculating the weight using a load cell unit, such a weighing device is used depending on the area where the weighing device is installed, even though it is the same subject and the same weighing device. , The weight of the subject to be calculated changes. The main cause is that the gravitational acceleration changes depending on the area.

For this reason, in general, in a weighing device having a load cell unit, a correction value corresponding to the gravitational acceleration of the area where the weighing device is used is stored in a table or the like in advance, and the electrical output from the load cell unit is output. In the process of calculating the weight of the subject based on the signal, by performing correction in accordance with the stored correction value, the weight that has been corrected for the influence of the change in the gravitational acceleration on the measured value is calculated. .

By the way, the gravitational acceleration in Japan is stipulated by law. As shown in FIG. 8, each area in Japan has information (hereinafter referred to as gravitational acceleration information) 102 indicating the magnitude of the gravitational acceleration. There is a district value list 104 showing a list classified into 16 types of use districts 103 based on.

As described above, in a weighing device that corrects a calculated weight in accordance with the gravitational acceleration information 102 in the use district section 103 corresponding to the use district, in accordance with the correction value stored in the table, for example, As shown in FIG. 3, the use district classification information 22 indicating the use district classification 103.
And the gravitational acceleration information 10 in each use district section 103
And a correction value table 25 for storing correction value information 24 based on 2 in association with each other.
The operator inputs the numerical value of the use district classification 103 corresponding to the district where the weighing device is used as the use district classification information 22, thereby acquiring the target correction value information 24 from the correction value table 25, and It is stored as a correction value.

As a result, the operator himself / herself visually searches for the intended use district division 103 from the district value list 104 printed on the paper as shown in FIG. 8 and uses the numerical value of the found use district division 103 as the use district. As the sorting information 22, the correction value information 24 can be input only by an operation to be input by operating a ten key or the like.

[0008]

However, as described above, the use district division 10 according to the district where the weighing device is used.
Since the operation of inputting 3 as the correction value is performed manually by the operator, the operation of confirming the input numerical value becomes complicated, and the district value list 10
There is a concern that an erroneous input of the numerical value (use district classification information 22) of the use district classification 103 due to an error in the case of No. 4 may occur.

For this reason, an incorrect correction value based on the gravitational acceleration information 102 is set, and naturally the measured weight is also inaccurate data, which lowers the reliability of the apparatus.

[0010] It is an object of the present invention to provide a weighing device which can facilitate the setting operation of gravitational acceleration information.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a weighing apparatus capable of preventing erroneous input of use district classification information.

[0012]

According to a first aspect of the present invention, there is provided a weighing apparatus, comprising: a load cell unit for outputting an electric signal corresponding to an applied load; a display unit; An operation unit having a touch panel, and a correction value table for storing, in association with each piece of district information obtained by dividing the earth into a plurality of districts, correction value information for correcting the weight in the district according to the gravitational acceleration. Display means for displaying a map on the display unit; touch position determination means for determining a touch position on the touch panel; and the map displayed on the display unit based on the touch position determined by the touch position determination means. District recognition means to recognize the middle district,
Referring to the correction value table, based on the correction value information obtaining means for obtaining the correction value information corresponding to the district recognized by the district recognition means, and the correction value information obtained by the correction value information obtaining means Weight calculating means for calculating a load applied to the load cell unit according to the electric signal output from the load cell unit.

Therefore, based on the touch position of the touch panel determined by the touch position determination means, the correction value information corresponding to the area in the map displayed on the display unit by the display means and recognized by the area recognition means is corrected. The correction value table is obtained by referring to the correction value table by the value information obtaining means. Based on the acquired correction value information, a weight applied to the load cell unit according to the electric signal output from the load cell unit is calculated by the weight calculation unit. This allows the operator to touch the corresponding area from the map displayed on the display unit, thereby obtaining correction value information.

According to a second aspect of the present invention, in the weighing apparatus according to the first aspect, the weight calculating means corresponds to the correction value information corresponding to the area where the apparatus is manufactured, and to the area where the apparatus is used. The load applied to the load cell unit is calculated with reference to the correction value information.

Therefore, it is possible to set the correction value information according to the district where the weighing device is used at the manufacturing place of the weighing device.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. This embodiment shows an example of application to a weighing device.

FIG. 1 is a perspective view showing a weighing device according to an embodiment of the present invention. Housing 2 having a housing shape of weighing device 1
A plate 3 on which a subject (article) to be weighed is placed is mounted on the upper side. The plate 3 is supported by a part of a load cell unit 4 (see FIG. 2) built in the housing 2.

An LCD (Liquid Crystal Display) 5 as a display unit is provided on the front surface of the housing 2.
On the display surface side of the LCD 5, a resistive touch panel 6 is laminated. In the present embodiment, the LCD 5 and the touch panel 6 function as an operation unit by synchronizing the positional relationship between the display data displayed on the LCD 5 and the coordinates of the touch panel 6.

A label issuing port 7 for issuing a label or the like on which predetermined items are printed by a printer unit (not shown) built in the housing 2 is formed on the front side of the housing 2 and beside the LCD 5.

FIG. 2 is a block diagram schematically showing the electrical connection of each part provided in the weighing device. The printer section includes a thermal head 8 having a plurality of heating elements, and a platen (not shown) which is in contact with the thermal head 8 and is rotated by a pulse motor 9 to convey label paper.

The weighing device 1 includes a microcomputer (hereinafter, referred to as a microcomputer) 10 that drives and controls each unit in the weighing device 1.
It has. The microcomputer 10 includes a CPU (Central Processing Unit) 11 that centrally controls and drives each unit, and a ROM (Read Only Memory) 1 in which a control program and fixed data such as a correction value table 25 shown in FIG. 3 are stored.
2. CPU1 that stores variable data in a rewritable manner
RAM (Random Access) functioning as one work area
Memory 13 is connected by a bus line 14.

FIG. 3 is an explanatory diagram showing the data structure of the correction value table 25. In the correction value table 25, the correction value information 24 is stored in association with each of the use district division information 22 as the district information indicating each district in which Japan is classified into the same gravity acceleration based on the gravity acceleration. Have been. The correction value information 24 is a reference area
The correction value information 24 (in the present embodiment, 10 wards) is represented as a ratio (coefficient) of the magnitude of the gravitational acceleration of the district where the acquisition of the correction value information 24 is desired.

In this embodiment, the correction value table 25 in which the correction value information 24 is associated with the use district classification information 22 classified into 16 types is used. However, the present invention is not limited to this. Alternatively, another correction value table (not shown) in which each correction value information 24 is associated with the use district classification information 22 classified into 11 types may be used.

The RAM 13 stores area value information storage areas 50 and 51 for storing set area value information T1 and shipping area value information T2, which will be described later, and a flag area F which is referred to when setting correction value information 24, which will be described later. Is secured.

Further, a print data area 15 for storing print data to be printed on a label, a print data area 15
The development buffer 16 and the like for developing the print data stored in. Although not particularly shown, the print data area 15 stores, as print data to be printed on a label, a product name, a price per unit weight, an internal capacity, a selling price, a place of origin of the product, and the like.

In addition, the RAM 13 has a bus line 14
Various files downloaded from a hard disk drive (HDD) (not shown) via an ATA (AT Attachment) 17 connected to the storage device are stored.

As various files, a PLU (Price (Price)) for storing product information such as the product name and the unit price per unit weight for each product code for identifying the product.
Look Up) file 19.

As shown in FIG. 8, the various files are used district division information 103 as district information indicating districts in which Japan is classified by the same gravitational acceleration based on the gravitational acceleration. There is a gravitational acceleration information file 104 having a file structure in which 16 types of gravitational acceleration information 102 for setting the correction value information 24 are stored in association with each other. Gravitational acceleration information file 104
Is the basis of the correction value table 25.

Further, as various files, the LCD 5
There is a display data file G for storing various display data to be displayed on the display. The various display data stored in the display data file G include, for example, display data (see FIG. 6) for displaying the mode setting key 34 on an initial screen 5A described later.
There are display data (see FIG. 7) for displaying the condition setting key 35 on the span setting screen 5B, and display data for displaying the Japanese map M (see FIG. 8) on the district value information setting screen 5C described later.

The HDD is connected to an ATA (AT Attachment) 17 when downloading the above-mentioned various files, and is not connected in a normal use state of the weighing device 1.

The display controller 2 is connected to the bus line 14.
The LCD 5 is connected via the LCD 6. LCD5 is
The display data from the microcomputer 10 is transmitted to the display controller 26.
, The display controller 26 is driven to display predetermined items.

The touch panel 6 is connected to the bus line 14 via a panel controller 27. The panel controller 27 acquires the coordinate information 21 by recognizing the position of the XY coordinates on the touch panel 6 touched by the operator, and outputs a signal corresponding to the acquired coordinate information 21 to the microcomputer 10.

The thermal head 8 and the pulse motor 9 are connected to the bus line 14 via a printer controller 28. When print data is input from the microcomputer 10, the printer controller 28 drives the pulse motor 9 to drive various transport mechanisms such as a platen, and also causes the heating elements of the thermal head 8 to generate heat and to transmit the print data. Perform printing according to.

An A / D converter 30 of the load cell unit 4 is connected to the bus line 14 through an I / O port 29.
Is connected. A bridge circuit 32 is connected to the A / D converter 30 via an amplifier 31. The electric signal output from the bridge circuit 32 is amplified by the amplifier 31, converted to a digital value by the A / D converter 30, and output to the microcomputer 10. The microcomputer 10 calculates the weight of the subject placed on the plate 3 based on the output value from the load cell unit 4.

In addition, a communication I / F is connected to the bus line 14.
33 are connected. The weighing device 1 communicates with the communication I / F 3
Information is exchanged with an external device (not shown) such as a host computer connected via the communication device 3.

Next, the setting of the gravitational acceleration will be described with reference to FIGS. FIG. 4 is a flowchart schematically illustrating a process of setting the gravitational acceleration information executed by the CPU 11 based on the control program stored in the ROM 12. The setting process of the correction value information 24 is performed by operating a power switch (not shown) to start the weighing device 1.
Referring to the display data file G, the initial screen 5A
It is executed when it is displayed in D5. In the initial screen 5A, as shown in FIG. 5, display data indicating the positions of a plurality of mode designating keys 34 for designating a mode for setting various conditions, such as a span setting key 34a, is displayed on the LCD 5. .

When it is determined that the span setting key 34a has been operated while the initial screen 5A is displayed (S
1) Y, referring to the display data file G,
To display the span setting screen 5B (S2).

On the span setting screen 5B displayed on the LCD 5 in step S2, as shown in FIG. 6, the positions of a plurality of condition setting keys 35 for setting various conditions relating to the measurement, such as a district value information key 35a, are shown. Display data and a condition display area 36 for displaying various set conditions are displayed in association with each set condition. Further, on the span setting screen 5B, various setting keys 37 and the like operated at the time of zero point correction or span setting described later are displayed.

When the span setting screen 5B is displayed, the LCD is set based on the touch position on the touch panel 6.
It is determined which of the condition setting keys 35 displayed in 5 is touched.

While the span setting screen 5B is displayed, the LCD 5 is operated based on the touch position on the touch panel 6.
When it is determined that the position of the condition value key 35a has been operated by determining which of the condition setting keys 35 to be displayed is touched (Y in S3), the display data file G is referred to. A district value information setting screen 5C as shown in FIG. 7 is displayed on the LCD 5 (S4). On the district value information setting screen 5C, as shown in FIG. 7, display data indicating the Japan map M is displayed. Here, step S4
Thereby, a function as a display unit is executed.

The operator touches a target district on the Japan map M displayed on the LCD 5.

Here, "district" means, for example, XX prefecture
It means a specific area such as xx city (or town, village) in (or city, road, prefecture) where the gravitational acceleration is equivalent by law in Japan.

With the district value information setting screen 5C displayed on the LCD 5, the touch position on the touch panel 6 touched by the operator is acquired as coordinate information of the touch panel 6 (S5). Here, the function as the touch position determining means is executed in step S5.

Referring to the display data file G, the area corresponding to the acquired coordinate information of the touch panel 6 is displayed on the LCD 5.
(S6). Here, the function as the district recognition means is executed in step S6.

In step S6, use district classification information 22 corresponding to the recognized district is obtained (S7).

Next, referring to the correction value table 25,
The correction value information 24 corresponding to the used district classification information 22 obtained in step S7 is obtained (S8). Here, in step S8, a function as a correction value information acquisition unit is executed.

Then, the presence or absence of a flag is determined with reference to the flag area F (S9). In the present embodiment, when "0" is set in the flag area F, it is determined that there is a flag, and when "1" is set in the flag area F, it is determined that there is no flag.

If it is determined that "0" is set in the flag area F (Y in S9), the acquired correction value information 2
The coefficient based on 4 is set as the set district value information T1 in the district value information storage area 51 (S10), and "1" is set in the flag area F (S11).

In this embodiment, it is assumed that the weighing device 1 is manufactured in ten sections. For this reason, the coefficient set in the district value information storage area 50 as the set district value information T1 in step S10 is “1”.

Since the load cell unit 4 has an output error based on individual differences, it is necessary to correct such an output error in advance. Here, the individual difference is
It means the difference between the individual output value of the load cell unit 4 with respect to the presence or absence of the load and the value of the output data caused by the amplifier. Alternatively, load cell units 4 having different characteristics
It is necessary to adjust the characteristics of the bridge circuit 32, the amplifier 31, and the A / D converter 30 so as to meet the specifications of each of the weighing devices using. For this purpose, the zero point correction performed in step S12 and the step S12 are performed.
13 is the span setting. Although the detailed description is omitted because it is a known technique, the zero point correction is to obtain the output value (zero point) A from the load cell unit 4 in a state where nothing is placed on the plate 3. Similarly, the span setting is based on the magnitude (span) B- of the output value B from the load cell unit 4 based on the zero point A when the maximum load that can be weighed by the load cell unit 4 is applied.
The span coefficient is obtained based on A.

In the zero correction in step S12, for example,
An output value from the load cell unit 4 in a state where nothing is placed on the platen 3 determined by the operation of the predetermined setting key 37 by the operator is obtained as a zero point, and a non-volatile memory (FIG. (Not shown).

In the span setting in step S13, for example, an output from the load cell unit 4 in a state where a weight (not shown) having a rated load is placed on the plate 3 determined by an operation of a predetermined setting key 37 by the operator. Value is RO
In addition to storing in a non-volatile memory (not shown) provided in M or the like, a difference from the output value as the zero point acquired in step S12 is acquired as a span, and this difference is taken as a rated load.
Calculate span coefficient by dividing by (gram display).

The obtained span coefficient is stored in a non-volatile memory (not shown) and used in an actual weighing operation. That is, by multiplying the span when the subject is measured by the obtained span coefficient, a gram display of the load of the subject can be obtained.

On the other hand, if it is determined that “1” is set in the flag area F with reference to the flag area F,
(N in S9), a coefficient based on the acquired correction value information 24 is set as the shipping area value information T2 in the area value information storage area 51 (S14), and “0” is set in the flag area F (S).
15).

The coefficient set in the district value information storage area 51 as the shipping district value information T2 in step S14 is a ratio to the coefficient "1" set in the district value information storage area 50 as the set district value information T1 in step S10. Is represented. Specifically, in the present embodiment, since the correction information 24 for the tenth ward is “1”, the correction information 24 for the first to ninth wards is smaller than “1”, and the correction information 24 for the eleventh to sixteenth wards. 24 is greater than "1".

In the present embodiment, the acquired correction value information 24 is alternately set as set district value information T1 or shipping district value information T2 according to the presence or absence of a flag in the flag area F.

Conventionally, the setting of the set district value information and the shipping district value information is performed by visually searching for a target district name from a list in which characters are listed, and using the used district classification 103 ( The numerical value (use area division information 22) of FIG. 8) was manually input. For this reason,
There has been a concern that an erroneous numerical value may be set as the correction value information 24 due to an error in viewing the list, an input error of the numerical value of the use district classification 103 (use district classification information 22), or the like.

In this embodiment, there is no need for the operator to look up the list in which the characters are listed and search for the numerical value (use district classification information 22) of the use district classification 103 corresponding to the target district. By simply operating the target district on the map M, the used district classification information 22 can be input to set the set district value information and the shipping district value information. The work of searching for a target area as a graphic on the map of Japan M can be easily captured as an image, so that the work of setting the gravitational acceleration can be facilitated.

Further, since it is not necessary to manually input the numerical value of the use district classification information 22, it is possible to prevent the erroneous input of the correction value information 24, and to improve the reliability of the apparatus.

In such a configuration, when calculating the weight of the subject, the plate 3 is calculated based on the electric signal output from the load cell unit 4, the set area value information T1, and the shipping area value information T2. Calculate the weight of the subject placed on the. Here, a function as a weight calculating means is executed. At this time, the calculated value is corrected in accordance with the gravitational acceleration of the area where the weighing device 1 is installed. Therefore, even when the weighing device 1 is used in any area in Japan, the gravity of the subject is accurately determined. Can be calculated.

In the weighing device 1 of the present embodiment, since the correction value is set in advance according to the district where the weighing device 1 is used, the operator who actually uses the weighing device 1 performs the correction operation. Since it is not necessary, it can be used immediately after installation.

In this embodiment, step S10
In step S14, the correction value used in calculating the weight is set as a coefficient. However, the present invention is not limited to this. For example, the gravitational acceleration information 22 is directly used as the correction value in the set area value information T1 and the shipping area value information T2. The coefficient may be stored to calculate the coefficient when calculating the gravity.

In the present embodiment, display data indicating the Japanese map M is displayed on the LCD 5 as the district value information setting screen 5C.
However, the present invention is not limited to this. For example, a gravitational acceleration information corresponding to the touched area is displayed by displaying a map showing the east or a world map and touching the area displayed on these maps. May be set.

[0064]

According to the weighing device of the first aspect of the present invention,
Based on the touch position of the touch panel determined by the touch position determination unit, the display unit displays correction value information corresponding to the area in the map displayed on the display unit and recognized by the area recognition unit,
The correction value information obtaining means obtains the load applied to the load cell unit according to the electric signal output from the load cell unit based on the correction value information obtained by referring to the correction value table and the obtained correction value information. As a result, the operator can touch the corresponding area on the map displayed on the display unit to obtain correction value information. This eliminates the need to manually input information, thereby facilitating the setting operation of the gravitational acceleration information and preventing erroneous input.

According to the second aspect of the invention, in the weighing device according to the first aspect, it is possible to set correction value information in accordance with a district where the weighing device is used, at a place where the weighing device is manufactured. Therefore, it is not necessary to reset the correction value in the area where the weighing device is used, so that it is possible to provide an easier-to-use weighing device.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a weighing device according to an embodiment of the present invention.

FIG. 2 is a block diagram schematically showing an electrical connection of each unit included in the weighing device.

FIG. 3 is an explanatory diagram showing a file structure of a gravitational acceleration information file.

FIG. 4 is a flowchart schematically showing a gravity acceleration setting process executed by a CPU based on a control program stored in a ROM.

FIG. 5 is a plan view showing an initial screen.

FIG. 6 is a plan view showing a span setting screen.

FIG. 7 is a plan view showing a district value setting screen.

FIG. 8 is an explanatory diagram showing a district value list.

[Explanation of symbols]

 1 Weighing device 4 Load cell unit 5 Display unit 6 Touch panel 25 Correction value table M Map

Claims (2)

[Claims] 1. A load cell unit for outputting an electric signal according to an applied load; an operation unit having a display unit and a touch panel laminated on a display surface side of the display unit; A correction value table that stores correction value information for correcting the weight in the district in accordance with the gravitational acceleration for each divided district information, a display unit that displays a map on the display unit, and the touch panel A touch position determining means for determining a touch position of; a district recognizing means for recognizing a district in the map displayed on the display unit based on the touch position determined by the touch position determining means; and the correction value table With reference to the correction value information obtaining means for obtaining the correction value information corresponding to the district recognized by the district recognition means, the correction value information obtaining means obtained by the Based on the positive information, weighing apparatus and a weight calculating means for calculating the load applied to the load cell unit in accordance with electrical signals outputted from the load cell unit. 2. The weight calculating means according to claim 1, wherein said correction value information corresponding to said area where said apparatus is manufactured and said correction value information corresponding to said area where said apparatus is used are added to said load cell unit. 2. The calculated load is calculated.
A weighing device as described.