JP2017181399A - Gas meter management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas meter management system which can determine occurrence of an abnormality state, where a detected temperature of a temperature detector input to a management control processor is abnormal.SOLUTION: The gas meter management system includes: a measuring unit 4 for measuring the amount of a fuel gas flowing in a gas flow passage R; a temperature detection unit 5 for measuring the temperature of the fuel gas flowing in the gas flow passage R; and a management control processing unit 6. The control processing unit 6 is configured to execute temperature range setting type abnormality determination processing of determining that an input detected temperature obtained by the temperature detection unit 5 is abnormal if the detected temperature is in the abnormality determination temperature range set according to measuring conditions.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a gas meter comprising: a metering unit that measures the amount of fuel gas flowing through a gas flow channel; a temperature detection unit that measures the temperature of the fuel gas flowing through the gas flow channel; and a control processing unit for management. Regarding the management system.

  As a conventional example of such a gas meter management system, when the amount of fuel gas measured by the metering unit is integrated to determine the amount of fuel gas used, the metering unit measures the fuel gas flow rate at regular intervals and measures Based on the temperature of the fuel gas measured by the temperature detector, the volume at a fixed time obtained by multiplying the flow rate of the fuel gas by a fixed time is converted into a volume at a preset reference temperature. In some cases, the amount of fuel gas used is accurately grasped by integrating the converted volumes (for example, see Patent Document 1).

  In Patent Document 1, a center device that can communicate freely with a metering unit, a temperature detection unit, and a gas meter including a microcomputer is provided, and the microcomputer included in the gas meter has a constant flow rate measured by the metering unit every predetermined time. The volume information obtained by multiplying the time and the temperature information measured by the temperature detection unit are communicated to the center device, and the center device obtains the volume and temperature information for each fixed time communicated from the gas meter. Based on this, it is configured to obtain a converted integrated value at a preset reference temperature.

That is, in Patent Document 1, the control processing unit for management is configured with the center device as a main part.
By the way, the gas meter is equipped with an indicator that displays the accumulated amount of fuel gas used, and the microcomputer installed in the gas meter calculates the volume obtained by multiplying the flow rate measured by the metering unit at a fixed time by a fixed time. When the volume received from the microcomputer is received, the display displays a new integrated value obtained by adding the newly received volume to the integrated value displayed at that time. It is configured as follows.

  As another conventional example of the gas meter management system, when the temperature of the fuel gas measured by the temperature detection unit exceeds the upper limit temperature (for example, 70 ° C.) or when the fuel gas measured by the temperature detection unit When the rate of change in temperature per minute exceeds the upper limit rate (for example, 5 to 10 ° C./min), a safety operation is performed to stop the supply of fuel gas by operating a shutoff valve that shuts off the gas flow path. There is one configured to do this (for example, see Patent Document 2).

  That is, in Patent Document 2, the gas meter is provided with a control unit that functions as a metering unit, a temperature detection unit, a cutoff valve, and a control processing unit for management, and the control unit has a cutoff valve for a safety operation. Configured to operate.

  Incidentally, the gas meter of Patent Document 2 is provided with a display panel for displaying the amount of fuel gas used, and the control unit integrates the amount of fuel gas obtained by integrating the flow rate of the fuel gas measured by the measuring unit. Is displayed on the display panel.

Moreover, although description is abbreviate | omitted in patent document 1 and patent document 2, generally the appropriate temperature range of the detection temperature of a temperature detection part was defined, and the control processing part for management was out of the setting appropriate range. When the detected temperature is input, the detected temperature of the input temperature detection unit is determined to be abnormal.
Incidentally, the appropriate temperature range is normally set as a temperature range that can be detected by the temperature detection unit, and is, for example, a range of −20 ° C. to 70 ° C.

JP 2004-219260 A JP 2003-194611 A

  In the gas meter management system, the temperature detection unit detects the temperature of the fuel gas flowing through the gas flow path as appropriate without causing the temperature detection unit to fail, and transmits the detection information of the temperature detection unit to the control processing unit. When there is no abnormality in the circuit and the detection information of the temperature detection unit is properly input to the control processing unit as appropriate, the control processing unit can perform various management processes as appropriate. is there.

  However, conventionally, when the detected temperature of the temperature detection unit input to the control processing unit is in an abnormal state different from the actual temperature, but is in an appropriate temperature range, the detected temperature detection unit is detected. Since it is not determined that the temperature is abnormal, the control processing unit can continue to use the abnormal detection temperature of the input temperature detection unit so that various processes for management can be performed appropriately. There was a possibility that it could not be done.

  In other words, the control processing unit may perform various management processes while erroneously recognizing an incorrect temperature different from the actual temperature of the fuel gas flowing through the gas flow path as the temperature of the fuel gas flowing through the gas flow path. Therefore, improvement was desired.

  The present invention has been made in view of the above circumstances, and its purpose is to appropriately determine an abnormality occurrence state in which the temperature detected by the temperature detection unit input to the control processing unit for management is abnormal. It is in the point which provides the management system of the gas meter which can do.

A gas meter management system according to the present invention includes a measuring unit that measures the amount of fuel gas flowing through a gas flow path, a temperature detection unit that measures the temperature of the fuel gas flowing through the gas flow path, and a control processing unit for management. The feature configuration is
The control processing unit determines that the detected temperature of the input temperature detection unit is abnormal when the detection temperature of the input temperature detection unit is within an abnormality determination temperature range set according to measurement conditions The temperature range setting type abnormality determination process is configured to execute.

  That is, the abnormality determination temperature range is set according to the measurement conditions, and the control processing unit determines that the detected temperature of the input temperature detection unit is the detection temperature of the input temperature detection unit within the abnormality determination temperature range. Since it is determined that there is an abnormality, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the management control processing unit is abnormal.

In other words, the measurement conditions include, for example, a fuel gas flow state in which the fuel gas flows through the gas flow path and a fuel gas non-flow state in which the fuel gas does not flow through the gas flow path.
In other words, the piping that supplies the fuel gas has a piping portion that is close to the gas meter provided with a gas flow path that is to be detected by the measuring unit and the temperature detection unit, but the piping portion that is away from the gas meter is underground. Will be buried.

Therefore, the temperature of the fuel gas in the gas flow path that is to be detected by the measuring section and the temperature detection section varies greatly with the fluctuation of the outside air temperature when the fuel gas does not flow through the gas flow path. .
On the other hand, in the fuel gas flow state in which the fuel gas flows through the gas flow path, the fuel gas from the pipe portion buried in the ground flows through the gas flow path and is buried in the ground. Since the temperature of the fuel gas in the piping section is not easily affected by fluctuations in the outside air temperature, the temperature of the fuel gas in the gas passage is the outside air temperature in the fuel gas flow state where the fuel gas is flowing through the gas passage. Even if it fluctuates due to fluctuations in the temperature, it tends to fluctuate within a smaller range than fluctuations in the outside air temperature.

That is, as shown in FIG. 5, in summer, the temperature (gas temperature) of the fuel gas flowing through the gas flow path becomes higher in the time zone around noon (12:00 to 15:00). The gas flow state tends to be lower than the fuel gas non-flow state. Further, the fuel gas temperature tends to fluctuate more greatly in the fuel gas non-flowing state than in the fuel gas flowing state.
In the winter season, the temperature of the fuel gas (gas temperature T) becomes higher during the daytime (12:00 to 15:00), and in the same time zone, the fuel gas flow state is higher than the fuel gas non-flow state. It tends to be higher. Further, the fuel gas temperature does not fluctuate as much as in the summer, although the fuel gas temperature tends to fluctuate more greatly in the fuel gas non-flowing state than in the fuel gas flowing state.

  Therefore, for example, when the fuel gas is flowing through the gas flow path, the maximum temperature (for example, 30 ° C.) at which the temperature of the fuel gas in the gas flow path becomes the highest or the fuel gas flow in the gas flow path The lowest temperature (for example, 10 ° C.) at which the temperature becomes the lowest or either one of them is determined by experiment or the like, and the upper limit temperature (for example, 10 ° C.) is added to the maximum temperature (for example, 30 ° C.) , 40 ° C.), a range lower than the lower limit temperature (0 ° C.) obtained by subtracting a margin value (eg, 10 ° C.) from the minimum temperature (eg, 10 ° C.), or one of them as an abnormality determination temperature Set as a range.

Incidentally, the maximum temperature (for example, 30 ° C.) at which the temperature of the fuel gas in the gas flow path becomes the highest when the fuel gas is flowing through the gas flow path is about noon in the summer in the year. It will appear in the time zone (12: 00-15: 00).
Further, when the fuel gas is flowing through the gas flow path, the lowest temperature (for example, 10 ° C.) at which the temperature of the fuel gas in the gas flow path is the lowest is the midnight time of winter in the year. Appears in the belt (0 o'clock to 4 o'clock).

As a result, when the detected temperature of the temperature detection unit input to the control processing unit for management falls within the abnormality determination temperature range when the fuel gas is flowing through the gas flow path, that is, the upper limit When it is higher than the temperature or lower than the lower limit temperature, it can be determined that the detected temperature of the temperature detection unit input to the management control processing unit is not appropriate.
By the way, when the detected temperature of the temperature detection unit falls within the abnormality determination temperature range, the detected temperature of the temperature detection unit is not immediately determined not to be appropriate, but to avoid the influence of various noises. When the abnormality determination temperature range continues for a set time (for example, 15 minutes to 1 hour), it is preferable to determine that the detected temperature is not appropriate.

  The abnormality determination temperature range set as described above (for example, a range higher than 40 ° C. or a range lower than 0 ° C.) is an appropriate temperature range (for example, a temperature range that can be detected by the temperature detection unit). −20 ° C. to 70 ° C.), it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the control processing unit for management is abnormal it can.

  In addition, as measurement conditions, for example, when the fuel gas is not flowing through the gas flow path, the lowest temperature (for example, 0 ° C.) or the gas flow at which the temperature of the fuel gas in the gas flow path is the lowest. The maximum temperature (for example, 40 ° C.) at which the temperature of the fuel gas of the road becomes the highest or either one of them is obtained by experiment etc., and a margin value (for example, 10 ° C.) is added to the maximum temperature (for example, 40 ° C.) A range higher than the upper limit temperature (for example, 50 ° C.), a range lower than the lower limit temperature (−10 ° C.) obtained by subtracting a margin value (for example, 10 ° C.) from the minimum temperature (for example, 0 ° C.), or those Either one of the above is set as the abnormality determination temperature range.

Incidentally, the maximum temperature (for example, 40 ° C.) at which the temperature of the fuel gas in the gas flow path is highest when the fuel gas is not flowing through the gas flow path is about noon in the summer in the year. It will appear in the time zone (12: 00-15: 00).
Further, when the fuel gas is not flowing through the gas flow path, the lowest temperature (for example, 0 ° C.) at which the temperature of the fuel gas in the gas flow path is the lowest is the midnight time of winter in the year. Appears in the belt (0 o'clock to 4 o'clock).

As a result, when the detection temperature of the temperature detection unit input to the control processing unit for management is in the abnormality determination temperature range when the fuel gas is not flowing through the gas flow path, When the temperature is higher than the upper limit temperature or lower than the lower limit temperature, it can be determined that the detected temperature of the temperature detection unit input to the management control processing unit is not appropriate.
By the way, when the detected temperature of the temperature detection unit falls within the abnormality determination temperature range, the detected temperature of the temperature detection unit is not immediately determined not to be appropriate, but to avoid the influence of various noises. When the abnormality determination temperature range continues for a set time (for example, 15 minutes to 1 hour), it is preferable to determine that the detected temperature is not appropriate.

  The abnormality determination temperature range to be set (for example, a range higher than 50 ° C. or a range lower than −10 ° C.) is an appropriate temperature range (for example, −20) set as a temperature range detectable by the temperature detection unit. Therefore, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the management control processing unit is abnormal.

In addition to the fuel gas flow state and the fuel gas non-flow state described above, the measurement conditions include the season, for example, summer (for example, May to September) and winter (for example, October to April). Either or both can be mentioned.
That is, without distinguishing between the fuel gas flow state and the fuel gas non-flow state, for example, the maximum temperature or the minimum temperature or one of them in the summer or winter or one of them is determined by experiment, As in the case of the non-flowing state of the fuel gas, when the maximum temperature is obtained, a margin value is added to the maximum temperature to obtain the upper limit temperature in summer and / or winter, and a range higher than the upper limit temperature is obtained. When the temperature is set to the abnormal determination temperature range or the minimum temperature is obtained, the margin value is subtracted from the minimum value to obtain the lower limit temperature in summer or winter or one of them, and the range lower than the lower limit temperature is determined. It can be set to the abnormality determination temperature range.

  Then, the abnormality determination temperature range that is set is the appropriate temperature range (for example, −20) that is set as a temperature range that can be detected by the temperature detector, as in the case of the fuel gas flow state or the fuel gas non-flow state. Therefore, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the management control processing unit is abnormal.

Furthermore, as measurement conditions, a time slot | zone, for example, the time slot | zone (12 o'clock to 15 o'clock) of noon, the midnight time slot | zone (0 o'clock to 4 o'clock), or one of them can be mentioned.
That is, without distinguishing between the fuel gas flowing state and the fuel gas non-flowing state, and not distinguishing between summer and winter, the daytime period (12 o'clock to 15 o'clock) and the night time period (0 o'clock to 4 o'clock) ) Or the maximum temperature or the minimum temperature in one of them, and in the same way as in the fuel gas flow state or the fuel gas non-flow state described above, an extra value is added to the maximum temperature, Find the upper-limit temperature of the midnight time zone or one of them, and set the range higher than the upper-limit temperature as the abnormality determination temperature range, or subtract the margin value from the minimum value, and set the The time zone or the lower limit temperature of one of them can be obtained, and a range lower than the lower limit temperature can be set as the abnormality determination temperature range.

  Then, the abnormality determination temperature range that is set is the appropriate temperature range (for example, −20) that is set as a temperature range that can be detected by the temperature detector, as in the case of the fuel gas flow state or the fuel gas non-flow state. Therefore, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the management control processing unit is abnormal.

  As described above, when the abnormality determination temperature range is set according to the measurement condition and the detected temperature of the temperature detection unit input to the control processing unit is within the abnormality determination temperature range, the detected temperature detection unit is detected. Since it is determined that the temperature is abnormal, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the management control processing unit is abnormal.

  In short, according to the characteristic configuration of the management system of the gas meter of the present invention, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the management control processing unit is abnormal.

  Further, the gas meter management system according to the present invention is further characterized in that the abnormality determination temperature range is the measurement condition, the fuel gas flow state in which the fuel gas flows through the gas flow path, and the gas flow path. Is set in accordance with either or both of the non-flowing state of the fuel gas in which the fuel gas is not flowing.

  That is, as described above, the pipe for supplying the fuel gas is a pipe part that is separated from the gas meter, although the pipe part close to the gas meter having the gas flow path to be detected by the measuring part and the temperature detection part is disposed on the ground. Is buried in the ground, the temperature of the fuel gas in the gas flow path to be detected by the metering unit and the temperature detection unit is the non-flowing state of the fuel gas in which the fuel gas does not flow in the gas flow path, In the fuel gas flow state in which the fuel gas is flowing through the gas flow path, the fuel flow in the gas flow path to be detected by the metering unit and the temperature detection unit varies greatly with the change in the outside air temperature. The temperature tends to fluctuate in a range smaller than the fluctuation of the outside air temperature.

  Therefore, the temperature of the fuel gas in the gas flow path is the highest for either or both of the fuel gas flow state in which the fuel gas flows through the gas flow path and the fuel gas non-flow state in which the fuel gas does not flow through the gas flow path. The maximum temperature that rises and / or the lowest temperature at which the temperature of the fuel gas in the gas flow path becomes the lowest is obtained by experiment etc., and when the maximum temperature is obtained, it is higher than the upper limit temperature obtained by adding a margin to the maximum temperature. When the high range is set as the abnormality determination temperature range and the minimum temperature is obtained, the range lower than the lower limit temperature obtained by subtracting the margin value from the minimum temperature is set as the abnormality determination temperature range.

  As a result, when the detected temperature of the temperature detection unit input to the control processing unit for management is in the abnormality determination temperature range in either or both of the fuel gas flow state and the fuel gas non-flow state, that is, When the temperature is higher than the upper limit temperature or lower than the lower limit temperature, it can be determined that the detected temperature of the temperature detection unit input to the management control processing unit is not appropriate.

  Then, the set abnormality determination temperature range can be set within an appropriate temperature range set as a temperature range that can be detected by the temperature detection unit, and is therefore input to the control processing unit for management. An abnormality occurrence state in which the temperature detected by the temperature detection unit is abnormal can be appropriately determined.

  In short, according to a further characteristic configuration of the gas meter management system of the present invention, the fuel gas flowing state in which the fuel gas flows through the gas flow path and the fuel gas non-flowing state in which the fuel gas does not flow through the gas flow path By setting the abnormality determination temperature range according to either or both, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the control processing unit is abnormal.

  Further, a further characteristic configuration of the gas meter management system of the present invention is that the abnormality determination temperature range is set according to the season as the measurement condition.

That is, as the measurement condition, the abnormality determination temperature range is set according to the season, for example, one or both of summer (for example, May to September) and winter (for example, October to April).
In other words, without distinguishing between the fuel gas flow state and the fuel gas non-flow state, when the maximum temperature or the minimum temperature or one of them is determined by experiment and the maximum temperature is determined in the summer and / or winter, Add a margin value to the temperature to determine the upper limit temperature in summer and / or winter, and set a range higher than the upper limit temperature as the abnormality determination temperature range, or if the minimum temperature is determined, Then, the margin value is subtracted to obtain the lower limit temperature of summer or winter or one of them, and a range lower than the lower limit temperature can be set as the abnormality determination temperature range.

  As a result, in either or both of summer and winter, when the temperature detected by the temperature detection unit that is input to the management control processing unit continues to be in the abnormality determination temperature range, it is input to the management control processing unit. It can be determined that the detected temperature of the temperature detection unit is not appropriate.

  Then, the abnormality determination temperature range set according to the summer or winter season can be set within a set appropriate range (for example, −20 ° C. to 70 ° C.) set as a temperature range that can be detected by the temperature detector. Therefore, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the management control processing unit is abnormal.

  In short, according to the further characteristic configuration of the gas meter management system of the present invention, the abnormality detection temperature range input to the control processing unit is abnormal by setting the abnormality determination temperature range according to the season. The occurrence state can be determined appropriately.

  A further characteristic configuration of the gas meter management system of the present invention is that the abnormality determination temperature range is set according to a time zone as a measurement condition.

In other words, as a measurement condition, an abnormality determination temperature range is set according to one or both of a time zone, for example, a daytime time zone (12:00 to 15:00), a midnight time zone (0 to 4 o'clock), or the like. To do.
In other words, without distinguishing between the fuel gas flowing state and the fuel gas non-flowing state, and distinguishing between the summer and the winter, it is possible to set the daytime period (12:00 to 15:00) and the midnight time period (0 to 4 o'clock). ) Or the maximum temperature, the minimum temperature, or one of them is determined by experiment, and the maximum temperature is determined in the same manner as in the above-described fuel gas flow state or fuel gas non-flow state. In addition, a marginal value was added to determine the upper limit temperature of the daytime period, midnight time period or one of them, and a range higher than the upper limit temperature was set as the abnormality determination temperature range, or the minimum temperature was determined In such a case, the marginal value may be subtracted from the minimum temperature to obtain the lower limit temperature of one of the time zone and midnight time zone, and a range lower than the lower limit temperature may be set as the abnormality determination temperature range. it can.

  Then, the abnormality determination temperature range that is set is the appropriate temperature range (for example, −20) that is set as a temperature range that can be detected by the temperature detector, as in the case of the fuel gas flow state or the fuel gas non-flow state. Therefore, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the management control processing unit is abnormal.

  In short, according to the further characteristic configuration of the gas meter management system of the present invention, the detected temperature of the temperature detection unit input to the control processing unit is abnormal by setting the abnormality determination temperature range according to the time zone. The abnormality occurrence state can be appropriately determined.

  Further, the gas meter management system according to the present invention is further characterized in that the abnormality determination temperature range includes the season as the measurement condition, the fuel gas flow state in which the fuel gas flows through the gas flow path, and the It is in the point set according to the conditions which combined the fuel gas non-flow state where the said fuel gas is not flowing into the gas flow path, or both.

That is, the abnormality determination temperature range is set according to a condition that is a combination of the season and one or both of the fuel gas flow state and the fuel gas non-flow state as the measurement condition.
Incidentally, as a season, for example, either or both of summer (for example, May to September) and winter (for example, October to April) can be targeted.

  The temperature of the fuel gas in the gas flow path tends to be lower in the winter than in the summer, and in the summer, the fuel gas flow state in which the fuel gas flows through the gas flow path However, in the winter, the fuel gas flow state in which the fuel gas flows through the gas flow path tends to be lower than the fuel gas non-flow state in which the fuel gas does not flow through the gas flow path. The fuel gas tends to be higher than the non-flowing state of fuel gas in which the fuel gas does not flow through the path.

  Therefore, for example, the minimum temperature that appears when the fuel gas is not flowing in the summer is obtained by experiments, and a range lower than the lower limit obtained by subtracting the margin value from the minimum temperature is set as the abnormality determination range. The maximum temperature that appears in the fuel gas flow state can be obtained through experiments or the like, and a range higher than the upper limit value obtained by adding a margin value to the maximum temperature can be set as the abnormality determination range.

  In addition, for example, the maximum temperature that appears when the fuel gas is not flowing in winter is obtained by experiments, and a range higher than the upper limit obtained by adding a margin value to the maximum temperature is set as the abnormality determination range. The minimum temperature that appears when the fuel gas is in the non-flowing state can be obtained through experiments or the like, and a range lower than the lower limit value obtained by subtracting the margin value from the minimum temperature can be set as the abnormality determination range.

  Then, the abnormality determination temperature range set according to the summer or winter season can be set within a set appropriate range (for example, −20 ° C. to 70 ° C.) set as a temperature range that can be detected by the temperature detector. Therefore, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the management control processing unit is abnormal.

  In short, according to the further characteristic configuration of the gas meter management system of the present invention, the abnormality determination temperature range is set in accordance with the season and either the fuel gas flow state or the fuel gas non-flow state or a combination of both. By doing so, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the control processing unit is abnormal.

  Further, the gas meter management system according to the present invention is further characterized in that the abnormality determination temperature range includes the season as the measurement condition, and either or both of the fuel gas flow state and the fuel gas non-flow state. In other words, it is set in accordance with the condition combining the time zone.

That is, the abnormality determination temperature range is set according to a condition in which the season, one of or both of the fuel gas flowing state and the fuel gas non-flowing state, and the time zone are combined as measurement conditions.
By the way, as a season, for example, one or both of summer (for example, May to September) and winter (for example, October to April) can be targeted. For example, it is possible to target either or both of a time zone in the daytime (for example, 12:00 to 15:00) and a time zone in the middle of the night (for example, 0:00 to 4 o'clock).

  Therefore, for example, the lowest temperature that appears when the fuel gas is not flowing in the summer time zone (for example, from 12:00 to 15:00) is obtained by experiments and the lower limit value obtained by subtracting the margin value from the minimum temperature. The maximum temperature that appears when the fuel gas is flowing in the summer time zone (for example, from 12:00 to 15:00) is determined by experimentation, etc. A range higher than the upper limit value including the margin value can be set as the abnormality determination range.

  In addition, for example, the maximum temperature that appears when the fuel gas is not flowing in a midnight time zone (for example, 0:00 to 4 o'clock) in winter is obtained by experimentation, and is higher than the upper limit value obtained by adding a margin value to the maximum temperature. Set the high range as the abnormality judgment range, or find the minimum temperature that appears when the fuel gas flows in the winter midnight time zone (for example, 0:00 to 4 o'clock) by experiment, etc. A range lower than the lower limit value obtained by subtracting can be set as the abnormality determination range.

  In other words, the temperature of the fuel gas in the gas flow path tends to be lower in the winter than in the summer, and in the summer, the temperature in the fuel gas flow state in which the fuel gas flows through the gas flow path However, it is lower than when the fuel gas is not flowing through the gas flow path. In winter, the gas flow is lower when the fuel gas is flowing through the gas flow path. The fuel gas tends to be higher than when the fuel gas is not flowing through the path.

  Furthermore, in summer, the time zone around noon (for example, from 12:00 to 15:00) tends to have a higher temperature of the fuel gas in the gas flow path than in other time zones, and in the winter season, In the midnight time zone (for example, 0:00 to 4 o'clock), the temperature of the fuel gas in the gas flow path tends to be lower than in other time zones.

Therefore, for example, in determining the minimum temperature that appears in the non-flowing state of fuel gas in the summer, the minimum temperature during the daytime period (for example, from 12:00 to 15:00) is determined so that the temperature is as high as possible. Can be requested.
Then, a lower limit temperature (for example, 10 ° C.) obtained by subtracting a margin value from the minimum temperature as an abnormality determination temperature range in the summer time period (for example, 12:00 to 15:00) and in a non-flowing state of the fuel gas. By setting a lower range, the abnormality determination temperature range can be set as wide as possible.

  As a result, the temperature of the fuel gas in the gas flow path is higher than the abnormality determination temperature range, that is, the lowest temperature when the fuel gas is in a non-flowing state in the summer time zone (for example, from 12:00 to 15:00). If it falls within the lower range, it can be appropriately determined that the detected temperature of the temperature detection unit input to the control processing unit is abnormal.

Further, in obtaining the maximum temperature that appears in the fuel gas non-flowing state in winter, the temperature as low as possible can be obtained by obtaining the maximum temperature in a midnight time zone (for example, 0:00 to 4 o'clock).
And, as an abnormality determination temperature range in the midnight time zone (for example, 0:00 to 4 o'clock) in the winter season and the fuel gas non-flowing state, from an upper limit temperature (for example, 30 ° C.) obtained by adding a margin value to the maximum temperature By setting a higher range, the abnormality determination temperature range can be set as wide as possible.

  Then, the abnormality determination temperature range set according to the summer or winter season can be set within a set appropriate range (for example, −20 ° C. to 70 ° C.) set as a temperature range that can be detected by the temperature detector. Therefore, it is possible to appropriately determine an abnormality occurrence state in which the detected temperature of the temperature detection unit input to the management control processing unit is abnormal.

  In short, according to the further characteristic configuration of the gas meter management system of the present invention, the abnormality determination temperature range is set according to the season, one or both of the fuel gas flow state and the fuel gas non-flow state, and the time zone. Accordingly, it is possible to more appropriately determine the abnormality occurrence state in which the temperature detected by the temperature detection unit input to the control processing unit is abnormal.

Further, the further characteristic configuration of the gas meter management system of the present invention is:
A pressure detector for detecting the pressure of the fuel gas flowing through the gas flow path;
Based on the detection information of the temperature detection unit and the detection information of the pressure detection unit, the control processing unit converts the detection amount detected by the measurement unit into a conversion amount at a set reference temperature and a set reference pressure. It is configured to execute a conversion integration process for correcting and integrating the conversion amount to obtain a conversion integrated value.

  That is, the control processing unit corrects the amount of fuel gas detected by the metering unit to a conversion amount at the set reference temperature and the set reference pressure, and integrates the conversion amount to obtain a conversion integrated value. Will be executed.

  Since the conversion integration process is executed in this way, even if the pressure or temperature of the fuel gas flowing in the gas flow path fluctuates, the conversion integration value at the set reference temperature and at the set reference pressure is obtained, and this conversion integration is performed. Since the amount of gas fuel used can be grasped based on the value, the amount of gas fuel to be charged can be grasped appropriately.

  In short, according to the further characteristic configuration of the gas meter management system of the present invention, even if the pressure or temperature of the fuel gas flowing in the gas flow path fluctuates, it is possible to appropriately recognize the amount of gas fuel used.

Schematic showing the installation mode of gas supply piping Schematic showing the configuration of the gas meter Flow chart showing abnormality determination processing The flowchart which shows another form of abnormality determination processing Assumption diagram showing changes in fuel gas temperature Graph showing changes in fuel gas temperature due to seasonal changes in fuel gas flow Graph showing changes in fuel gas temperature in summer A graph showing changes in fuel gas temperature during the winter season A graph showing changes in fuel gas temperature during the winter season

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Pipe installation for gas supply)
As shown in FIG. 1, the fuel gas supply pipe 1 is arranged in such a manner that the adjacent pipe portion 1A adjacent to the gas meter G is exposed on the ground and the separated pipe portion 1B away from the gas meter G is buried in the ground. It is installed.

The present embodiment exemplifies a pipe 1 that supplies medium-pressure city gas as a fuel gas. For example, a separated pipe portion 1B composed of a steel pipe or the like is several tens of centimeters from the ground surface F. The fuel gas (city gas) from the gas meter G is buried in the depth and is supplied to a large-scale factory or the like through the supply pipe 2.
Incidentally, there are medium pressure A (for example, 0.3 MPa to 1.0 MPa) and medium pressure B (for example, 0.03 MPa to 0.3 MPa) as the medium gas medium pressure. In the embodiment, the medium pressure A and the medium pressure B are collectively referred to as medium pressure.

(Configuration of gas meter)
As shown in FIG. 2, the gas meter G includes a meter main body Ga and an electronic corrector Gb in the present embodiment.
The meter body Ga is a meter that measures the amount of fuel gas flowing through the internal pipe 3 flanged to the adjacent pipe portion 1A of the pipe 1 that supplies gas fuel, and the gas flow path R formed by the internal pipe 3. The temperature detection part 5 which measures the temperature of the part 4 and the fuel gas which flows through the gas flow path R is provided.

Although there exist various forms, such as a turbine type and an ultrasonic type, as the measurement part 4, in this embodiment, it is comprised by the turbine type. The measuring unit 4 is configured to output, as a detection signal (hereinafter referred to as a detection amount Q), for example, one pulse of an electrical signal every time 1 m ³ of fuel gas flows.

In the present embodiment, the temperature detector 5 is configured using a platinum resistance thermometer. And the temperature detection part 5 is comprised so that the temperature signal (resistance value change) corresponding to a temperature change may be output.
Further, when the temperature detector 5 operates normally, it is configured to output a temperature signal (hereinafter referred to as a gas temperature T) corresponding to between −20 ° C. and 70 ° C.

  The corrector Gb displays a control processing unit 6 for management mainly composed of a microcomputer, an operation input unit 7 for inputting various command information to the control processing unit 6, and display information from the control processing unit 6. And a pressure sensor 9a for detecting the pressure of the fuel gas flowing through the gas flow path R of the meter body Ga.

The control processing unit 6 includes a detection amount Q from the metering unit 4 of the meter body Ga, a gas temperature T from the temperature detection unit 5, and a pressure detection signal (hereinafter referred to as detection pressure P) of the pressure sensor 9a. It is configured to be entered.
Then, the control processing unit 6 is configured to execute an integration process, a conversion integration process, and a temperature abnormality determination process, as will be described later, based on various types of input information.

The pressure sensor 9a is connected to a gas pressure introduction pipe 9b connected to the gas flow path R of the meter main body Ga. The pressure sensor 9a is connected to the internal pressure of the gas pressure introduction pipe 9b, that is, the meter main body Ga. The pressure of the fuel gas flowing through the gas flow path R is detected.
Incidentally, in this embodiment, the pressure sensor 9a and the gas pressure introduction pipe 9b constitute a pressure detector 9 that detects the pressure of the fuel gas flowing through the gas flow path R of the meter body Ga.

(Control operation of the control processing unit)
The control processing unit 6 is configured to execute an integration process for obtaining an integrated value (gas usage amount) S based on detection information (detected amount Q) of the measuring unit 4.
That is, the detection value Q of the measuring unit 4 is sequentially integrated to obtain an integrated value (gas usage amount) S.

  In addition, the control processing unit 6 is based on the detection information (detection amount Q) of the measurement unit 4, the detection information (gas temperature T) of the temperature detection unit 5, and the detection information (detection pressure P) of the pressure sensor 9a. The detected amount Q of 4 is corrected to the converted amount QK at the set reference temperature TK and at the set reference pressure PK, and the converted integrated process for calculating the converted integrated value SK by integrating the converted amount QK is executed. Yes.

Although the set reference temperature TK and the set reference pressure PK can be variously changed and set, for example, the set reference temperature TK is 15 ° C. and the set reference pressure PK is 0.981 kPa.
The conversion amount QK is obtained by the following formula based on Boyle-Charles' law.
QK = α × β × Q
However, α = (273.2 + TK) ÷ (273.2 + T)
β = (101.325 + PK) ÷ (101.325 + P)

And the control process part 6 is comprised so that either one of the integration value S calculated | required by the integration process and the conversion integration value SK calculated | required by the conversion integration process may be displayed on the indicator 8.
Incidentally, the operation input unit 7 is configured to select which of the integrated value S and the converted integrated value SK is to be displayed.

(Abnormality judgment processing)
The control processing unit 6 is configured to execute an abnormal range determination process and a temperature range setting type abnormality determination process as a temperature abnormality determination process for determining that the gas temperature T of the input temperature detection unit 5 is abnormal. ing.
That is, as the temperature abnormality determination process, the control processing unit 6 deviates from the temperature range (−20 ° C. to 70 ° C.) when the temperature detection unit 5 operates normally. An abnormal range determination process for determining that the temperature is abnormal is executed when the temperature is in the abnormal range, and an abnormality notification process for notifying that the temperature is abnormal is determined when the temperature is determined to be abnormal. Has been.

Incidentally, the above-described abnormal ranges are set as a low temperature side range in which the gas temperature T of the temperature detection unit 5 is lower than −20 ° C. and a high temperature side range in which the gas temperature T is higher than 70 ° C.
In addition, as the abnormality notification process, for example, when displaying the integrated value S obtained by the integration process or the converted integrated value SK obtained by the conversion integration process on the display unit 8, a display state and a display for displaying them are displayed. It is configured to perform a so-called blinking display in which the non-display state is not repeated for a short time.

  Further, as the temperature abnormality determination process, when the gas temperature T of the input temperature detection unit 5 is within the abnormality determination temperature range set according to the measurement conditions, the control processing unit 6 inputs the temperature detection unit 5. The temperature range setting type abnormality determination process for determining that the detected temperature is abnormal is executed, and when it is determined that the temperature is abnormal, it is notified that the temperature is abnormal as in the above-described abnormal range determination process. An abnormality notification process is executed.

  In this embodiment, the abnormality determination temperature range is a fuel gas flow state in which the fuel gas flows through the gas flow path R, a fuel gas non-flow state in which the fuel gas does not flow in the gas flow path R, as measurement conditions, It is configured to be set according to the season and time zone.

Specifically, in the summer, in the case of a fuel gas flow state, regardless of the time zone, the temperature range in which the gas temperature T is 40 ° C. or higher, and in the case of a fuel gas non-flow state, the time in the daytime In the band (for example, from 12:00 to 15:00), the temperature range in which the gas temperature T is 10 ° C. or lower is set as the abnormality determination temperature range.
By the way, by setting the abnormality determination temperature range by limiting the time zone, the abnormality determination temperature range can be set to a range in which a temperature abnormality can be easily detected.

  Further, in the winter, regardless of the time zone in the case of the fuel gas flowing state, the temperature range in which the gas temperature T is 0 ° C. or less, and in the case of the fuel gas non-flowing state, the midnight time zone (for example, 0 o'clock to 4 o'clock), the temperature range in which the gas temperature T is 30 ° C or higher is set as the abnormality determination temperature range.

Incidentally, in the case where the detection amount Q is not output from the measuring unit 4 during the elapse of a set time (for example, 2 to 3 hours), the control processing unit 6, that is, 1 m ³ of fuel gas flows through the gas flow path R. If the electric signal of one pulse output every time is not output from the measuring unit 4 during the elapse of the set time, it is determined that the fuel gas is in a non-flowing state. It is configured to determine that there is.

(Explanation of gas temperature T)
FIG. 5 shows the temperature (gas temperature T) of the fuel gas flowing through the gas flow path R due to the change between the fuel gas flow state and the fuel gas non-flow state, the seasonal change, and the time zone change based on the experimental results. It is the figure which assumed the form from which () changes.

In summer, the temperature of the fuel gas (gas temperature T) is lower in the fuel gas flow state than in the fuel gas non-flow state in the same time zone. Further, the fuel gas temperature tends to fluctuate more greatly in the fuel gas non-flowing state than in the fuel gas flowing state.
In winter, the fuel gas temperature (gas temperature T) is higher in the fuel gas flow state than in the fuel gas non-flow state in the same time zone. Further, the fuel gas temperature does not fluctuate as much as in the summer, although the fuel gas temperature tends to fluctuate more greatly in the fuel gas non-flowing state than in the fuel gas flowing state.

  The reason why the gas temperature T shows such a tendency is that the fuel gas in the separated pipe portion 1B embedded in the ground in the pipe 1 tends to be maintained at a constant temperature without being greatly affected by the outside air temperature. This is because the fuel gas in the adjacent piping portion 1A exposed to the ground is greatly affected by the outside air temperature.

  That is, when the fuel gas is in a flow state, the fuel gas in the separated pipe portion 1B flows through the gas flow path R of the gas meter G. When the fuel gas is in a non-flow state, the fuel gas stays in the adjacent pipe portion 1A. However, while the fuel gas in the separated pipe portion 1B tends to be maintained at a constant temperature without being greatly affected by the outside air temperature, the fuel in the adjacent pipe portion 1A exposed to the ground This is because the gas is greatly affected by the outside air temperature.

  Next, actual measurement data of changes in the temperature of the fuel gas (gas temperature T) will be described with reference to FIGS. By the way, these measured data are measured in cities in the Kinki region. 6 to 8 are measured in different cities, and the measured data in FIGS. 8 and 9 are measured at the same place.

FIG. 6 shows the average gas temperature, which is the daily average value of the gas temperature T flowing through the gas flow path R, and the daily average value of the outside air temperature in the gas meter G in which fuel gas is constantly flowing throughout the year. It shows the relationship with the average temperature.
From this measured data, it can be understood that the average gas temperature is greatly influenced by the outside air temperature in the summer, but is maintained at around 10 ° C. without being greatly affected by the outside temperature in the winter. .

FIG. 7 shows actual measurement data in summer (July to September) when the presence or absence of the fuel gas flowing through the gas meter G often varies from day to day, and is an average that is the daily average value of the gas temperature T. The relationship between gas temperature and the gas amount per hour of the gas flow rate which flows through the gas flow path R of the gas meter G every day is shown.
From the actual measurement data, it can be understood that the average gas temperature is around 20 ° C. on the day when the fuel gas flows, but the average gas temperature rises to about the outside temperature on the day when the fuel gas does not flow.

8 and 9 show changes in the temperature of the fuel gas (gas temperature T) with the passage of time in winter (February).
In FIG. 8, the case where the fuel gas which flows through the gas flow path R of the gas meter G exists between 8:00 and 18:00 is shown, and the change of the gas amount of the fuel gas is also shown.
FIG. 9 shows a case where the fuel gas flowing through the gas flow path R of the gas meter G is not generally present throughout the day.

  8 and 9, in the time zone between 8 o'clock and 18 o'clock, in the case of the fuel gas flow state, the fuel gas temperature (gas temperature T) is maintained at a constant temperature, whereas the fuel gas When the fuel gas is in a non-flowing state where the gas does not flow substantially, it can be understood that the temperature of the fuel gas (gas temperature T) varies greatly due to the influence of the outside air temperature.

  Therefore, referring to the actual measurement data in FIGS. 6 to 9, the gas flow path R is changed by the change in the fuel gas flow state and the fuel gas non-flow state, the change in the season, and the change in the time zone in FIG. 5. It can be understood that the form in which the temperature of the fuel gas flowing through (gas temperature T) changes is correct.

(Details of temperature abnormality judgment processing)
Next, the temperature abnormality determination process will be described in detail based on the flowchart of FIG.
First, temperature detection for reading the gas temperature T detected by the temperature detection unit 5 is executed (# 1), and then the read gas temperature T falls within the abnormality determination temperature range (the lower temperature range where the temperature is lower than −20 ° C.). Or a high temperature side range higher than 70 ° C.) (# 2). If the gas temperature T is in the abnormal range, an abnormality notification process is executed (# 6).

  In the process of # 2, if it is determined that the gas temperature T is not in the abnormal range, it is next determined whether or not it is summer (# 3). Then, it is determined whether or not the fuel gas is flowing (# 4).

  If it is determined in step # 4 that the fuel gas is flowing, it is next determined whether the gas temperature T is 40 ° C. or higher (# 5), and the gas temperature T is 40 ° C. or higher. If the gas temperature T is not 40 ° C. or higher, the process proceeds to # 1.

If it is determined in the process of # 4 that the fuel gas is not flowing, that is, the fuel gas is not flowing, it is next determined whether or not it is a time zone around noon (12:00 to 15:00). If it is determined (# 7) and it is not the time zone around noon, the process proceeds to # 1.
If it is determined in the process of # 7 that the time zone is around noon, it is determined whether the gas temperature T is 10 ° C. or lower (# 8), and the gas temperature T is 10 ° C. or lower. In this case, the abnormality notification process is executed (# 6), and if the gas temperature T is not 10 ° C. or lower, the process proceeds to the process of # 1.

If it is determined in the process of # 3 that it is not summer, in other words, it is winter, it is next determined whether or not it is in a fuel gas flow state (# 9).
If it is determined in the process of # 9 that the fuel gas is flowing, it is next determined whether or not the gas temperature T is 0 ° C. or lower (# 10), and the gas temperature T is 0 ° C. or lower. If the gas temperature T is not 0 ° C. or lower, the process proceeds to # 1.

If it is determined in step # 9 that the fuel gas is not flowing, that is, the fuel gas is not flowing, it is next determined whether or not it is a midnight time zone (0 o'clock to 4 o'clock). However, if it is not the midnight time zone, the process proceeds to # 1.
If it is determined in the process of # 11 that it is a midnight time zone, it is determined whether the gas temperature T is 30 ° C. or higher (# 12), and the gas temperature T is 30 ° C. or higher. First, the abnormality notification process is executed (# 6), and if the gas temperature T is not 30 ° C. or higher, the process proceeds to the process of # 1.

  In determining whether the gas temperature T is in the abnormal range or the gas temperature T is in the abnormal determination temperature range, if the gas temperature T is in the abnormal range or the abnormal determination temperature range, the temperature is immediately abnormal. Since there is a risk of erroneous determination due to various noises, a state where the gas temperature T is in the abnormality determination temperature range or the abnormality determination temperature range is set for a set time (for example, 15 minutes to 1 hour). When it continues, it is preferable to comprise so that it may determine with temperature abnormality.

(Summary of the first embodiment)
In the first embodiment, in the temperature abnormality determination process, the input gas temperature T of the temperature detector 5 deviates from the temperature range (−20 ° C. to 70 ° C.) when the temperature detector 5 operates normally. In addition to executing the abnormal range determination process for determining that the temperature is abnormal, the abnormal determination temperature set by the input gas temperature T of the temperature detection unit 5 according to the change in the measurement conditions is determined. When the temperature is within the range, the temperature detection unit 5 determines that the detected temperature of the input temperature detection unit 5 is abnormal, and thus the temperature range setting type abnormality determination process is executed. Therefore, the temperature detection unit input to the control processing unit 6 It is possible to appropriately determine that the gas temperature T of No. 5 is abnormal.

  In addition, the abnormality determination temperature range in the temperature range setting type abnormality determination process includes, as measurement conditions, a fuel gas flow state in which the fuel gas flows through the gas flow path R, and a fuel gas in which the fuel gas does not flow through the gas flow path R. Since it is set according to the non-flowing state, the season, and the time zone, it is easy to determine that the gas temperature T of the temperature detection unit 5 input to the control processing unit 6 is abnormal in the abnormality determination temperature range. Therefore, it can be more appropriately determined that the gas temperature T of the temperature detection unit 5 input to the control processing unit 6 is abnormal.

[Second Embodiment]
Next, a second embodiment will be described. This second embodiment shows details of the temperature abnormality determination process, that is, another embodiment of the flowchart of the temperature abnormality determination process. Since it is the same as that of the first embodiment, only parts different from the first embodiment will be described, and detailed description of the same configuration as that of the first embodiment will be omitted.

Hereinafter, another embodiment of the temperature abnormality determination process will be described based on the flowchart of FIG. 4.
First, temperature detection is performed to read the gas temperature T detected by the temperature detector 5 (# 21), and then the read gas temperature T is within an abnormal range (a low temperature side range lower than −20 ° C., or , A high temperature side range higher than 70 ° C. is determined (# 22), and when the gas temperature T is in the abnormal range, an abnormality notification process is executed (# 25).

If it is determined in step # 22 that the gas temperature T is not in the abnormal range, it is next determined whether or not the fuel gas is in a flowing state (# 23).
If it is determined that the fuel gas is flowing, it is next determined whether the gas temperature T is 40 ° C. or higher or 0 ° C. or lower (# 24). Is 40 ° C. or higher, or when the gas temperature is 0 ° C. or lower, abnormality notification processing is executed (# 26), and when the gas temperature T is not 40 ° C. or higher and not 0 ° C. or lower. The process proceeds to # 21.

If it is determined in the process of # 22 that the fuel gas is not flowing, that is, the fuel gas is not flowing, it is next determined whether or not it is summer (# 26).
If it is determined that it is summer, it is determined whether or not it is a time zone around noon (12:00 to 15:00) (# 27). If it is not a time zone around noon, the processing of # 21 is performed. Will be migrated.

  In the process of # 27, when it is determined that it is a time zone during the daytime, it is determined whether or not the gas temperature T is 10 ° C. or less (# 28), and the gas temperature T is 10 ° C. or less. In some cases, an abnormality notification process is executed (# 25), and if the gas temperature T is not 10 ° C. or lower, the process proceeds to # 1.

If it is determined in the process of # 26 that it is not summer, in other words, winter, it is next determined whether or not it is a midnight time zone (0 to 4 o'clock) (# 29). ) If the time is not midnight, the process proceeds to # 21.
If it is determined in the process of # 29 that it is a midnight time zone, it is determined whether or not the gas temperature T is 30 ° C. or higher (# 12), and the gas temperature T is 30 ° C. or higher. First, the abnormality notification process is executed (# 6), and if the gas temperature T is not 30 ° C. or higher, the process proceeds to the process of # 1.

  In determining whether the gas temperature T is in the abnormal range or the gas temperature T is in the abnormal determination temperature range, if the gas temperature T is in the abnormal range or the abnormal determination temperature range, it is immediately determined that the temperature is abnormal. Then, since there is a risk of misjudgment due to various noises, when the state in which the gas temperature T becomes an abnormal range or an abnormal determination temperature range continues for a set time (for example, 15 minutes to 1 hour), It is preferable to configure so as to determine that the temperature is abnormal.

(Summary of the second embodiment)
As described above, in the second embodiment, in the fuel gas flow state, it is determined whether or not the gas temperature T is in the range of 40 ° C. or higher, and the gas temperature T is in the range of 0 ° C. or lower. The determination of whether or not is possible regardless of the season, and therefore, in the fuel gas flow state, the mode of determination is illustrated without determining the season.

  In the second embodiment, similarly to the first embodiment described above, in the temperature abnormality determination process, in addition to executing the abnormal range determination process, the temperature range setting type abnormality determination process is executed. Therefore, it can be appropriately determined that the gas temperature T of the temperature detection unit 5 input to the control processing unit 6 is abnormal.

  In addition, the abnormality determination temperature range in the temperature range setting type abnormality determination process includes, as measurement conditions, a fuel gas flow state in which the fuel gas flows through the gas flow path R, and a fuel gas in which the fuel gas does not flow through the gas flow path R. Since it is set according to the non-flowing state, the season, and the time zone, it is easy to determine that the gas temperature T of the temperature detection unit 5 input to the control processing unit 6 is abnormal in the abnormality determination temperature range. Therefore, it can be more appropriately determined that the gas temperature T of the temperature detection unit 5 input to the control processing unit 6 is abnormal.

[Another embodiment]
Next, another embodiment is listed.
(1) In the first and second embodiments described above, the abnormal range determination process and the temperature range setting type abnormality determination process are exemplified in the temperature abnormality determination process, but the abnormal range determination process is omitted. May be implemented.

(2) In the first and second embodiments, the abnormality determination temperature range in the temperature range setting type abnormality determination process is a fuel gas flow state in which the fuel gas is flowing through the gas flow path R as a measurement condition. The case where the fuel gas is not flowing through the gas flow path R is exemplified according to the non-flowing state of the fuel gas, the season, and the time zone, but the specific configuration for setting the abnormality determination temperature range according to the measurement conditions Can be changed in various ways.

  For example, a mode in which the abnormality determination temperature range is set according to one or both of the fuel gas flow state and the fuel gas non-flow state as the measurement condition, and the abnormality determination temperature range is only in the season as the measurement condition. The form etc. which are set according to can be adopted.

(3) In the first and second embodiments, the case where the abnormality determination temperature range in summer (for example, a range of 10 ° C. or less) is set by limiting the time zone around noon is exemplified. The lowest temperature that appears when the fuel gas is not flowing in the entire time zone of the day may be obtained by experiments or the like, and in summer, a range lower than the lowest temperature may be set as the abnormality determination temperature range.

(4) In the first and second embodiments, the case where the abnormality determination temperature range in winter (for example, a range of 30 ° C. or more) is set by limiting the midnight time zone is exemplified. The maximum temperature that appears when the fuel gas is not flowing in the entire time zone of the day may be obtained by experiments or the like, and in winter, a range higher than the maximum temperature may be set as the abnormality determination temperature range.

(5) In the first and second embodiments described above, the mode as the measurement state is illustrated as being divided into winter and summer, but it is divided into winter, spring, summer, and autumn, depending on each. An abnormality determination temperature range may be set.

(6) In the first and second embodiments, the gas meter G installed corresponding to the medium-pressure city gas is exemplified as the fuel gas, but the gas meter installed corresponding to the high-pressure city gas It may be carried out for a gas meter installed corresponding to low-pressure city gas.

(7) In the above-described embodiment, the case where the measuring unit 4 outputs an electrical signal of one pulse every time 1 m ³ of fuel gas flows as the detection amount Q is exemplified. In each case, a detection amount Q that outputs the flow rate of the fuel gas can be used.
Incidentally, in this case, the output flow rate (detection amount Q) is determined based on the detection information (gas temperature T) of the temperature detection unit 5 and the detection information (detection pressure P) of the pressure sensor 9a. In addition, the converted integrated flow rate can be obtained by correcting the converted flow rate at the set reference pressure PK (converted amount QK), multiplying the corrected converted flow rate by a certain time, obtaining the volume, and integrating the volume.

(8) In the first and second embodiments, the detection amount Q of the measuring unit 4 is based on the detection information (gas temperature T) of the temperature detection unit 5 and the detection information (detection pressure P) of the pressure sensor 9a. In the above example, the corrected reference value TK is corrected to the converted amount QK at the set reference pressure PK and the converted amount QK is integrated to obtain the converted integrated value SK. Based on the detection information (gas temperature T) of the unit 5, the conversion integrated value QK at the set reference temperature TK may be corrected, and the converted integrated value SK may be integrated to obtain the converted integrated value SK.

(9) In the first and second embodiments, the case where the control processing unit 6 that executes the temperature range setting type abnormality determination processing is installed in the gas meter G is illustrated, but via the Internet or a telephone communication line. You may implement with the form which uses the control part for management with which the management center communicated with the gas meter G is used as a control processing part which performs temperature range setting type | mold abnormality determination processing.

  The configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in the other embodiment, as long as no contradiction occurs. The embodiment disclosed in this specification is an exemplification, and the embodiment of the present invention is not limited to this. The embodiment can be appropriately modified without departing from the object of the present invention.

4 Measuring unit 5 Temperature detecting unit 6 Control processing unit 9 Pressure detecting unit R Gas flow path

Claims (7)

A gas meter management system comprising a measuring unit that measures the amount of fuel gas flowing through a gas flow path, a temperature detection unit that measures the temperature of the fuel gas flowing through the gas flow path, and a control processing unit for management. And
The control processing unit determines that the detected temperature of the input temperature detection unit is abnormal when the detection temperature of the input temperature detection unit is within an abnormality determination temperature range set according to measurement conditions A gas meter management system configured to execute temperature range setting type abnormality determination processing.   The abnormality determination temperature range is either the fuel gas flow state in which the fuel gas flows through the gas flow path or the fuel gas non-flow state in which the fuel gas does not flow through the gas flow path as the measurement condition The management system of the gas meter of Claim 1 set according to these or both.   The gas meter management system according to claim 1, wherein the abnormality determination temperature range is set according to a season as the measurement condition.   The gas meter management system according to claim 1, wherein the abnormality determination temperature range is set according to a time zone as the measurement condition.   The abnormality determination temperature range includes the season as the measurement condition, a fuel gas flow state in which the fuel gas flows through the gas flow path, and a fuel gas non-flow state in which the fuel gas does not flow through the gas flow path The management system of the gas meter of Claim 1 set according to the conditions which combined either or both of these.   The abnormality determination temperature range is set according to a condition combining a season, one of or both of the fuel gas flow state and the fuel gas non-flow state, and a time zone as the measurement condition. 5. The gas meter management system according to 5. A pressure detector for detecting the pressure of the fuel gas flowing through the gas flow path;
Based on the detection information of the temperature detection unit and the detection information of the pressure detection unit, the control processing unit converts the detection amount detected by the measurement unit into a conversion amount at a set reference temperature and a set reference pressure. The gas meter management system according to any one of claims 1 to 6, wherein the gas meter management system is configured to execute a conversion integration process for correcting and integrating the conversion amount to obtain a conversion integration value.

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