JP2000337943A - Gas meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas meter which can accurately display the integrated amount of gas less than a specific unit. SOLUTION: The gas meter is equipped with an under-specific-unit figure display means 34c which displays an under-specific-unit figure showing that an integrated amount is the specific unit in steps by multiple segments and a segment decision means 34b which decides segments corresponding to an integrated amount calculated by an integrating means 34a. The number of the segments is so determined that state changes of segments displayed changing in steps by the under-specific-unit figure display means 34c can be recognized, and the under-specific-unit figure display means 34c displays the under-specific- unit figure corresponding to the decision result obtained by the segment decision means 34b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas meter, and more particularly, to a gas meter for displaying on a display unit up to a digit less than a predetermined unit of an integrated amount calculated based on a passing volume of gas flowing in a flow path. It is about.

[0002]

2. Description of the Related Art A schematic configuration of a general gas supply system is shown in FIG.
This will be described with reference to FIG. The gas supply system 80 includes a gas container 81 for storing a liquefied gas, and a pressure for adjusting (reducing) the pressure of the gas flowing out of the gas container 81 so that an outlet side pressure of a gas meter described later corresponds to a reference pressure. Adjuster 8
2, a gas appliance 85 for burning and converting gas connected to the pressure regulator 82 via the gas pipe 83 to heat energy, and a gas cock 86 for supplying / cutting off gas to the gas appliance 85. It is provided with.

Next, the outline operation will be described. Gas cock 86
Is opened, the liquefied gas in the gas container 81 is depressurized by the pressure regulator 82 and supplied to the gas meter 84 via the gas pipe 83. And this gas meter 84
Accumulates the gas passing volume and displays the accumulation result on its display unit. In parallel with this, gas is supplied to the gas appliance 85 via the gas meter 84 and the gas cock 86.

In the gas supply system described above, a gas meter 84 installed in a flow path for supplying gas accumulates an integrated amount based on a passing volume flowing through the flow path, and this integrated amount is displayed on an LCD or the like. It is displayed on the configured display unit.

[0005] Here, in the figure for explaining the conventional display example of the gas meter of FIG. 9, reference numeral 38 denotes a display section, and the display section 38 has a display number of four cubic meters (10 cubic meters).
(00 liter) display section 38a, a three-digit liter display section 38b, and a lighting display section 38d that lights up for a predetermined time every time 0.1 liter flows. And
Lighting display unit 38d every time the integrated amount increases by 0.1 liter
Is repeatedly turned on and off (blinks at a 0.2 liter cycle), and when the integrated amount reaches 1 liter, the liter digit of the liter display portion 38b is increased. In this way, the light-up display unit 38 displays the integrated amount to less than the liter unit.
By displaying by d, it was possible to confirm whether the gas meter was functioning normally.

[0006]

However, in the above-mentioned conventional gas meter, since the integrated value less than the liter unit is displayed only by blinking of the lighting display part 38d of the display unit 38, the integrated value less than the liter unit is displayed. I could not confirm. Then, when performing instrumental error measurement, which is a measurement of the integrated error of the gas meter, since accurate instrumental error measurement cannot be performed with a measurement up to the liter digit, the number of blinks of the lighting display unit 38d is counted to measure the gas loading amount. That means
The blinking cycle of the lighting display section 38d is, for example, when the gas flow rate is 4
In the case of [m ³ / h], 0.09 [s] lighting, 0.09
[S] It became short, such as turning off the light, and the flicker cycle became shorter as the gas flow rate increased. Therefore, in the conventional gas meter, when the gas flow rate increases, the lighting display section 38d
This makes it difficult to count the number of blinks of, and has a disadvantage that an integrated value of less than a liter cannot be accurately recognized.

There has also been a conventional gas meter which displays an integrated value of less than a liter in numerical values. However, even with such a gas meter, when the gas flow rate is large, the numerical value in a unit of less than a liter changes too quickly. As a result, it becomes difficult to recognize the numerical value,
It has the same problem as a gas meter that displays an integrated value less than a liter by blinking d.

Accordingly, the present invention has been made in view of the above-described problems,
It is an object of the present invention to provide a gas meter capable of accurately displaying an integrated amount of gas less than a predetermined unit.

[0009]

The gas meter according to the first aspect of the present invention, which has been made to solve the above-mentioned problem, has a structure as shown in FIG. 1 which is based on the volume of gas passing through a flow path. Integrating means 34a for integrating the integrated amount by
A display unit 38 for displaying the integrated amount integrated by the integrating means 34a. In the gas meter, a figure smaller than a predetermined unit indicating a predetermined unit of the integrated amount is displayed stepwise by a plurality of segments on the display unit 38. A display unit for displaying a figure smaller than a predetermined unit; and a segment determination unit for determining the segment in accordance with the load amount calculated by the integration unit, wherein the plurality of segments display the figure smaller than the predetermined unit. The number of segments that can be recognized by the means 34c so as to be able to recognize a change in the state of the segment that is displayed stepwise is displayed. The graphic display means 34c smaller than the predetermined unit is determined by the segment determination means 34b. The figure smaller than the predetermined unit according to the determined result is displayed.

According to the gas meter of the present invention, the segment is determined by the segment determining means 34b in accordance with the load amount calculated by the integrating means 34a. Then, a figure smaller than a predetermined unit, which is smaller than a predetermined unit of the integrated amount by a segment according to the determination result of the segment determination unit 34b from the plurality of segments, is displayed on the display unit 38 by the figure display unit 34c. Therefore, the integrated value of the gas less than the predetermined unit is displayed stepwise on the display unit 38 by the segment corresponding to the change of the integrated amount calculated by the integrating means 34a. Can be visually recognized. Further, since the plurality of segments are configured so as to be able to recognize a change in the state of the segment displayed in a stepwise manner by the figure display unit 34c smaller than the predetermined unit, even if the gas flow rate increases. The integrated value of gas less than the predetermined unit can be accurately recognized. Therefore, the integrated value of the gas less than the predetermined unit can be easily counted by the change of the segment displayed stepwise, so that the accuracy in the instrumental error measurement can be improved.

According to a second aspect of the present invention, there is provided the gas meter according to the first aspect, wherein the graphic display means for smaller than a predetermined unit displays a predetermined unit displayed on the display unit. It is characterized in that the figure smaller than the predetermined unit is made to be in the vicinity of the integrated value display figure showing the load amount.

According to the gas meter of the present invention, the figure smaller than the predetermined unit is displayed on the display unit 38 by the figure smaller than the predetermined unit display means 34c. It is displayed near the figure. Therefore, since the integrated value of the gas less than the predetermined unit and the integrated amount of the predetermined unit or more that are displayed stepwise can be visually recognized at a glance, the instrumental difference measurement can be easily performed, and the instrumental difference measurement can be easily performed. Can be further improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas meter according to the present invention will be described below with reference to FIGS. Since the gas supply system is the same as that described in the related art, only the control system of the gas meter will be described.

FIG. 2 is a block diagram showing a schematic configuration of a control system of the gas meter, FIG. 3 is a diagram showing an embodiment of a memory map of the RAM of FIG. 2, and FIG. 4 is a diagram of a gas meter according to the present invention. FIG. 5 is a diagram for explaining a display example, FIG. 5 is an enlarged view of a segment display section of FIG. 4, and FIG.
FIG. 7 is a flowchart illustrating an example of an integrated amount detection process performed by a PU, and FIG. 7 is a diagram illustrating a display example of a segment display unit in FIG. 2.

In FIG. 2, reference numeral 30 denotes a control system of the gas meter 84 shown in FIG.
0 is roughly divided into a passing volume detection unit 31 that detects that a predetermined amount of gas has flowed and outputs a passing volume detection pulse signal Pv, and integrates the passing volume based on the passing volume detection pulse signal Pv. An arithmetic unit 39 and a display unit 38 for displaying the calculation result are provided.

The operation unit 39 is provided with an input unit 33 and a CPU (Cent
ral Processing Unit (34) and ROM (Read Only Memor)
y) 35, a RAM (Random Access Memory) 36, and a drive circuit 37.

The input unit 33 converts the passing volume detection pulse signal Pv from the passing volume detection unit 31 constituted by a heat-sensitive flow sensor or the like into the passing volume detection pulse data DPv and outputs it to the CPU 34.

The CPU 34 calculates the gas passing volume based on the passing volume detection pulse data DPv, and integrates the calculated passing volume to determine the gas usage. The ROM 35 stores programs for the CPU 34 and the like. The RAM 36 stores various calculation results calculated by the CPU 34 and the like.

The drive circuit 37 drives the display unit 38 based on the display control signal Sc output from the CPU 34. The display unit 38 is driven based on a control signal from the drive circuit 37 to display the gas usage.

Next, an embodiment of a memory map of the RAM 36 will be described with reference to FIG. RAM in FIG.
Numeral 36 includes a passing volume storage area 361, an integrated gas amount storage area 362, a less-liter information storage area 363, an integrated value display information storage area 364, a segment information storage area 365, a display information storage area 366, and the like. I have.

The passing volume storage area 361 stores the calculated passing volume v. Gas accumulation amount storage area 36
2 stores the integrated gas amount V. In the less-liter information storage area 363, less-liter information u indicating an integrated value of the integrated gas amount V less than a liter unit (decimal part) is stored. Integrated value display information storage area 364
Stores integrated value display information sh indicating the integrated value of the integrated gas amount V in liter units or more (integer part). The segment information storage area 365 stores segment information sg that specifies the segments 1 to 4 to be lit on the display unit 38. The display information storage area 366 is generated based on the less than liter information and the integrated value display information.
8 stores the display information h output as the display control signal Sc.

Here, segments 1 to 4 are defined for each bit of the segment information sg. Specifically, the 0 bit of the segment information sg is segment 1,
1 bit is segment 2, 2 bits is segment 3, 3
Bit 4 is defined for each segment. By setting ON / OFF of each bit, the segments 1 to 4 to be lit on the display unit 38 are designated.

Next, referring to FIG. 4 and FIG.
An example of the display will be described. In FIG. 4, reference numeral 38 denotes a display unit. The display unit 38 has a display unit 38 a having four digits, a cubic meter (1000 liters) display unit, a three-digit liter display unit 38 b, and a four-segment display unit. And a segment display section 38c shown in FIG.

The cubic meter display section 38a is large, a liter display section 38b is provided at the lower right, and a segment display section 38c is provided at the right side thereof. In addition, the unit “m ³ ” is shown on the surface of the gas meter 84 below the cubic meter display section 38 a, and the unit “L” is shown on the surface of the gas meter 84 below the liter display section 38 b. The cubic meter display section 38a and the liter display section 38b are the same as those described in the related art.

As shown in FIG. 5, the segment display section 38c is composed of four segments, a segment 2 is arranged above the segment 1, and a segment 3 is arranged above the segment 2.
Are arranged, and the segment 4 is arranged further above. These segments 1 to 4 are sequentially turned on from segment 1 every time 0.2 liter of gas flows,
When 0.8 liter of gas flows, all of the segments 1 to 4 are turned on, and all of them are turned off when carrying to the liter digit.
By illuminating the segments 1 to 4 in the ascending order in this manner, a stepwise display of less than a liter unit is realized.

In the present embodiment, the four segments that realize a stepwise display in units of 0.2 liter so that the state change of the segment display that changes stepwise can be visually recognized at the maximum flow rate in the gas meter. Constitutes the segment display section 38c, but the present invention is not limited to this. For example, the segment display section 38c is composed of nine segments in order to realize a stepwise display in units of 0.1 liter. As long as the configuration does not deviate from the idea that the state change of the segment display changing stepwise according to the present invention can be visually recognized, the number of segments may be changed.

Next, an example of the outline of the operation of the integrated gas amount calculation processing performed by the CPU 34 will be described with reference to the flowchart of FIG. 6 and the drawings of FIGS.

In FIG. 6, the integrated gas amount calculation process is performed by starting the supply of electric power after the gas meter is installed.
Is operated, and when the passing volume detection pulse data DPv input from the input unit 33 is detected, it is called from the upper module.

In step S 1, a passing volume P per unit time is obtained based on the passing volume detection pulse data DPv from the passing volume detecting unit 31 via the input unit 33, and the obtained passing volume v is stored in the RAM 36. It is stored in the passing volume storage area 361, and the process proceeds to step S2.

In step S2, the integrated gas amount V stored in the integrated gas amount storage area 362 of the RAM 36 is stored.
Is added to the passing volume v stored in the passing volume storage area 361, and the added gas integrated amount V is stored in the gas integrated amount storage area 362, and the process proceeds to step S3.

In step S3, the integrated gas amount V stored in the gas load amount storage area 362 of the RAM 36 is stored.
Is obtained as less than liter information u, this less than liter information u is stored in the less than liter information storage area 363, and the process proceeds to step S4.

In step S4, the integrated gas amount V stored in the gas load amount storage area 362 of the RAM 36 is stored.
Is obtained as integrated value display information sh, and the integrated value display information sh is stored in the integrated value display information storage area 365, and the process proceeds to step S5.

In step S5, it is determined whether the display information u less than liter is smaller than 0.2 liter. When it is determined that the less than liter display information u is less than 0.2 liter (Y in step S5), the process proceeds to step S6.

In step S6, since the display information u of less than liter is not less than 0.0 liter and less than 0.2 liter, 0 to 3 bits of the segment information sg stored in the segment information storage area 365 of the RAM 36 are turned off. Is set, the segment information sg is cleared, and the process proceeds to step S14. This step S6
By the above processing, it is specified that the segments 1 to 4 are turned off on the display unit 38.

If it is determined in step S5 that the display information u less than liter is not smaller than 0.2 liter, that is, it is determined that the display information u is 0.2 liter or more (N in step S5),
Proceed to step S7. Then, in step S7,
It is determined whether the display information u less than liter is smaller than 0.4 liter. When it is determined that the less than liter display information u is less than 0.4 liter (Y in step S7), the process proceeds to step S8.

In step S8, since the less than liter display information u is not less than 0.2 liter and less than 0.4 liter, the 0 bit of the segment information sg stored in the segment information storage area 365 of the RAM 36 is set to ON. By doing so, the segment 1 of the segment information sg
Is turned on, and the process proceeds to step S14. This step S8
By this processing, it has been specified that only the segment 1 of the segment display section 38c is lit on the display section 38.

If it is determined in step S7 that the display information u less than liter is not smaller than 0.4 liter, that is, it is determined that the display information u is 0.4 liter or more (N in step S7),
Proceed to step S9. Then, in step S9,
It is determined whether the display information u less than liter is smaller than 0.6. When it is determined that the display information u less than liter is smaller than 0.6 liter or less (Y in step S9), the process proceeds to step S10.

In step S10, since the display information u less than liter is 0.4 liter or more and less than 0.6 liter, the segment information storage area 365 of the RAM 36
0 and 1 of the segment information sg stored in
When the bit is set to ON, the segment information sg
Are turned on, and the process proceeds to step S14. By the processing in step S10, the segments 1 and 2 of the segment display section 38c are displayed.
Are designated to be lit on the display unit 38.

If it is determined in step S9 that the display information u less than liter is not smaller than 0.6 liter, that is, it is determined that it is 0.6 liter or more (N in step S9),
Proceed to step S11. Then, in step S11, it is determined whether or not the less than liter display information u is smaller than 0.8. If it is determined that the display information u less than liter is smaller than 0.8 liter or less (step S11)
Y), and the process proceeds to step S12.

In step S12, since the display information u less than liter is not less than 0.6 liter and less than 0.8 liter, the segment information storage area 365 of the RAM 36
Are set to ON, the segments 1 to 3 of the segment information sg are turned ON, and step S1 is performed.
Proceed to 4. By the processing in step S12, it is specified that three of the segments 1 to 3 of the segment display section 38c are to be lit on the display section 38.

In step S11, the display information u less than liter is not smaller than 0.8 liter, that is, 0.8 liter.
If it is determined that the volume is equal to or more than liter (N in step S11), the process proceeds to step S13.

In step S13, since the display information u less than liter is not less than 0.8 liter and less than 1.0 liter, the segment information storage area 365 of the RAM 36
Are set to ON, all of the segments 1 to 4 of the segment information sg are turned on, and the process proceeds to step S14. By the processing in step S13,
Segment 1 to segment 4 of segment display section 38c
Are all specified to be displayed on the display unit 38.

In step S14, the display information h output to the display unit 38 as the display control signal Sc is stored in the RAM
The integrated value display information sh stored in the integrated value display information storage area 364 and the segment information storage area 36
5, and is stored in the display information storage area 366.

In step S15, the display information h stored in the RAM 366 is output to the drive circuit 37 as the display control signal Sc, and when the above-described series of processing ends, the process returns to the calling source. The display unit 38 displays the CP
It is driven by a control signal from a drive circuit 37 based on the display control signal Sc output from U34. Then
The integrated value of the gas based on the integrated value display information sh is displayed on the cubic meter display section 38a and the liter display section 38b of the display section 38, and the stepwise segment display based on the segment information sg is performed on the segment display section 38c. Will be

Next, an example of the operation (action) of the present embodiment in the above configuration will be described with reference to FIGS.

First, when a passing volume is detected by the passing volume detecting section 31, a passing volume detection pulse signal Pv is input to the input section 33.
Is output to Then, the passing volume detection pulse signal P
v is converted into passing volume detection pulse data DPv by the input unit 33 and input to the CPU 34.

The passing volume detection pulse data DPv is supplied to the CPU
34, the integrated gas amount detecting means is called, the passing volume v is calculated based on the passing volume detection pulse data DPv, and the integrated gas amount V is calculated (steps S1 and S2). Then, the integrated value of the gas integrated amount V less than the liter unit (below the decimal point) is acquired as the less than liter information u, and the integrated value of the gas integrated amount V equal to or more than the liter unit (above the decimal point) is acquired as the integrated value display information sh. (Steps S3 to S4).

Then, the segment to be lit on the segment display section 38c of the display section 38 is determined based on the less than liter information u (steps S5, S7, S9, S1).
1). This determination result is reflected in the segment information sg,
Display information h is generated based on the segment information sg and the integrated value display information sh, and is output to the drive circuit 37 (step S14). Then, the display unit is driven based on a control signal from the drive circuit 37. Then, the display unit 3
8 cubic meter display section 38a and liter display section 38b
, The integrated value of the gas based on the integrated value display information sh is displayed, and the segment display section 38c performs stepwise segment display based on the segment information sg.

Hereinafter, a display example of the segments 1 to 4 of the segment display section 38c will be described in detail with reference to FIG. Information u less than liter is 0.0 liter or more and 0.2
If it is less than liter (Y in step S5), all of the segments 1 to 4 are set to O in the segment information sg.
Since it is designated as FF, as shown in FIGS. 7A and 7F, all of the segments 1 to 4 are turned off.

If the information u less than liter is not less than 0.2 liter and less than 0.4 liter (Y in step S7), the segment information sg is specified so that the segment 1 is ON and the others are OFF. 7 (b) and (g), only the segment 1 is turned on, and the segments 2 to 4 are turned off.

When the information u less than liter is not less than 0.4 liter and less than 0.6 liter (Y in step S9), the segment information sg is specified so that the segments 1 and 2 are ON and the others are OFF. So that
As shown in FIG. 7C, the segments 1 and 2 are turned on, and the segments 2 to 4 are turned off.

When the information u less than liter is not less than 0.6 liter and less than 0.8 liter (Y in step S11),
Since segment information sg is specified so that segment 1 to segment 3 are ON and the others are OFF,
As shown in FIG. 7D, segment 1 to segment 3
Is turned on, and only the segment 4 is turned off.

If the information u less than liter is 0.8 or more (N in step S11), the segment information sg is specified so that all of the segments 1 to 4 are turned on. As shown in segment 1
All of segment 4 is turned on.

Therefore, when the integrated value of the gas is 0.0 liter, all of the segments 1 to 4 are turned off (FIG. 7).
(A)). When reaching 0.2 liter, only segment 1 is turned on (FIG. 7 (b)), and when reaching 0.4 liter, segment 1 and segment 2 are turned on (FIG. 7 (c)), and 0.6 liter , Segments 1 to 3 are turned on (FIG. 7D),
When the volume reaches 1 liter, all of the segments 1 to 4 are turned on (FIG. 7E). Then, when it reaches 1.0 liter, that is, when carrying to the liter unit, all of the segments 1 to 4 are turned off again (FIG. 7).
(F)).

Accordingly, by controlling the lighting and extinguishing of the segments 1 to 4 of the segment display section 38c, a step-by-step display corresponding to an increase of the integrated amount of gas less than the liter unit every 0.2 liter is achieved. Has been realized.

As is clear from the above description, the integrated value of the gas smaller than the liter unit (predetermined unit) is displayed stepwise on the display unit 38 by the segment corresponding to the change of the calculated integrated amount. In addition, the integrated value of the gas less than the predetermined unit can be visually recognized.

Further, the segment display section 38c is provided to provide a stepwise display in units of 0.2 liters so that the state change of the stepwise changing segment display can be visually recognized at the maximum flow rate in the gas meter 84. It consists of four segments. Therefore, even if the gas flow rate increases, the integrated value of the gas less than the liter unit (predetermined unit) can be accurately recognized. Therefore, it is possible to easily count the integrated value of the gas smaller than the liter unit (predetermined unit) by the change of the segment 1 to the segment 4 displayed stepwise, thereby improving the accuracy in the instrumental error measurement. Can be.

Further, a segment display section 38c for displaying a stepwise display according to the integrated amount of gas less than a liter unit (predetermined unit), and a numerical display according to the integrated amount of gas equal to or more than a liter unit (predetermined unit). Cubic meter display section 38
a and the liter display section 38b are arranged side by side,
The integrated value of less than a liter unit (predetermined unit) can be visually recognized at a glance. Therefore, counting and the like in instrumental measurement can be easily performed, so that accuracy in instrumental measurement can be further improved.

In the above-described embodiment, the predetermined unit in the claims is a liter unit. However, the present invention is not limited to this, and the predetermined unit depends on the environment in which the gas meter is used, the specifications, and the like. The unit can be set accordingly.

In the above-described embodiment, the description has been made of an embodiment in which the segments 1 to 4 are counted up in a stepwise manner in accordance with an increase in the integrated amount of gas every 0.2 liter. However, the present invention is not limited to this, and various display forms such as a step-down countdown in accordance with an increase in the integrated amount of gas every 0.2 liter can be adopted.

[0061]

As described above, according to the gas meter of the first aspect of the present invention, the integrated value of the gas less than the predetermined unit is stepped by the segment corresponding to the change of the integrated amount calculated by the integrating means. Since it is displayed on the display unit, it is possible to visually recognize the integrated value of the gas less than the predetermined unit. Further, since the plurality of segments are configured so as to be able to recognize a change in the state of the segment displayed in a stepwise manner by the graphic display means smaller than the predetermined unit, even if the gas flow rate increases, the predetermined The integrated value of gas less than the unit can be accurately recognized. Therefore,
Since the integrated value of the gas less than the predetermined unit can be easily counted by the change of the segment displayed step by step, there is an effect that the accuracy in the instrumental error measurement can be improved.

According to the gas meter of the present invention described in claim 2, in addition to the effect of the invention described in claim 1, the integrated value of gas less than a predetermined unit and the integrated value of gas equal to or more than a predetermined unit are displayed stepwise. Since the amount and the amount can be visually recognized at a glance, it is possible to easily perform the instrumental difference measurement, and it is possible to achieve an effect that the accuracy in the instrumental difference measurement can be further improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration of a gas meter according to the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a control system of the gas meter.

FIG. 3 is a diagram showing one embodiment of a memory map of a RAM in FIG. 2;

FIG. 4 is a diagram for explaining a display example of the gas meter according to the present invention.

FIG. 5 is an enlarged view of a segment display section of FIG.

FIG. 6 is a flowchart illustrating an example of an integrated amount detection process performed by the CPU of FIG. 2;

FIG. 7 is a diagram for explaining a display example of a segment display unit in FIG. 2;

FIG. 8 is a diagram showing a schematic configuration of a gas supply system.

FIG. 9 is a diagram for explaining a conventional display example of a gas meter.

[Explanation of symbols]

 34a integrating means (CPU) 34b segment determining means (CPU) 34c graphic display means (CPU) less than a predetermined unit 38 display unit

Claims (2)

[Claims] 1. A gas meter comprising: an integrating means for integrating an integrated amount based on a passing volume of gas flowing in a flow path; and a display unit for displaying the integrated amount integrated by the integrating means. A graphic display unit for displaying a figure smaller than a predetermined unit indicating a figure smaller than a predetermined unit of the integrated amount on the display unit in a stepwise manner; and determining the segment according to the loading amount calculated by the integrating unit. The plurality of segments are constituted by the number of segments capable of recognizing a change in the state of the segments displayed in a stepwise manner by the graphic display unit with less than a predetermined unit. The figure-under-unit graphic display means displays the figure-under-unit graphic according to the determination result determined by the segment determination means. Gas meter characterized by Rukoto. 2. The graphic display device according to claim 1, wherein the graphic display means displays the figure smaller than the predetermined unit so as to be in the vicinity of the integrated value display graphic indicating the load amount of the predetermined unit or more displayed on the display unit. The gas meter according to claim 1, wherein