JP3301016B2 - Gas remaining amount monitoring device in automatic meter reading notification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic meter reading system for detecting the consumption of LP gas supplied from a LP gas cylinder to a gas consuming device through a gas supply path and automatically reporting the meter reading value to an information center via a communication line. In the notification device, LP
The present invention relates to a gas remaining amount monitoring device that monitors the remaining amount of gas in a gas cylinder based on the amount of consumed gas and notifies an information center when the remaining amount reaches a warning level.

[0002]

2. Description of the Related Art Conventionally, for example, an information center and a terminal are respectively installed in an LPG distributor and an LPG consumer, and these are connected by a communication line such as a telephone line, and information is transmitted from the terminal through the communication line. An automatic reporting system has been considered in which a gas meter reading data and a warning information such as a gas leak are reported to a center at a report date and time predetermined to a terminal as needed.

FIG. 12 is a block diagram showing a general configuration of this type of meter reading system, in which 11 is an information center, 12 is an information center network controller (C-NCU),
13 and 14 are local exchanges (LS), 15 is a no-ringing trunk (NRT), 16 is a subscriber telephone, 1
Reference numeral 7 denotes a terminal as an automatic notification device including a controller 17a, a microcomputer gas meter (hereinafter abbreviated as gas meter) 17b as a measuring means, a network controller for terminal (NCU) 17c, and the like.

[0004] The information center 11 is installed at an appropriate place of, for example, an LPG dealer, and a terminal 17 (only one is shown in FIG. Terminals exist) for example, once a month
It collects gas meter reading data sent to the customer and performs billing operations for each gas consumer,
The company performs tasks such as monitoring warning information such as gas leaks reported from time to time and promptly taking appropriate measures according to the contents of the warning information.

[0005] The C-NCU 12 is connected to the information center 11 via n signal lines and is attached to the information center 11, and is provided on the information center side.
Communication control between one and many terminals 17 is performed by time sharing.

[0006] The LS 13 and LS 14 are installed in the telephone center nearest to the information center 11 and the terminal 17,
In addition, a telephone exchange operation is performed between the terminals 17 based on a telephone number generated when a call is made from one to the other. In particular, since the line for the subscriber telephone is also used on the terminal 17 side,
An NRT 15 is connected to the LS 14 so that a call can be received from the information center 11 without ringing the bell of the telephone. Since the information center 11 does not use the line with the telephone, the LS 13 is not connected to the NRT.

The NCU 17c in the terminal 17 is
This is to connect the terminal 17 and the line when there is an incoming call based on the call from the information center 11 or when a call is made from the controller 17a in the terminal 17 without disturbing the call by the user.

[0008] The gas meter 17b of the terminal 17 counts flow rate pulses generated each time a constant flow rate of gas flows through the gas flow path, and generates gas meter reading data as an index of gas consumption based on the counted value. And a microcomputer having a function of transmitting meter reading data to the controller 17a in response to a request from the controller 17a. On the other hand, the controller 17a requests the gas meter 17b to transmit meter reading data at a predetermined date and time, for example, once a month, and transmits the meter reading data transmitted from the gas meter 17b to the information center 11 in response to the request. , Warning information to the information center 11 based on security information such as the maximum flow rate that can be detected in the gas meter 17b, use time over, battery drop, etc., and a signal from a gas leak alarm device connected to other than the gas meter 17b. Also do the work.

In the above configuration, the information center 11 which performs centralized monitoring of a large number of terminals 17 is provided to the controller 17a of the terminal 17 installed at each gas consuming destination from the meter reading data of the gas meter 17b and the gas leak alarm. The security information from the device can be reported to the information center 11 via the controller 17a by an upstream message.

In the case of LP gas, the gas is supplied from a gas cylinder. Gas cylinders have a limited gas capacity that can be accommodated, and once the cylinder is empty, gas can no longer be used. LP gas suppliers make a lot of efforts to prevent such running out of gas because such a situation that occurs during use of the gas causes a great deal of trouble to the user.

Conventionally, in order to reduce the labor, the gas meter 17b is provided with a function of monitoring the remaining amount of the gas cylinder and notifying the information center 11 when the remaining amount is less than a predetermined amount. ing.

This conventional gas remaining amount monitoring function is based on the premise that a gas cylinder has a fixed capacity and a predetermined amount of gas is stored in the cylinder when the cylinder is replaced. It is counted separately from the meter reading data, and when the gas usage after replacement becomes a predetermined value or more, the information center 11 is notified of the fact.

[0013]

By the way, in a gas supply system that supplies gas to a plurality of houses, such as an apartment house or a two-family house, as shown in FIG. the gas supply pipe 18a and the pipe, so as to supply gas via the gas meter 17b ₁ ~17bn per each household branched from the gas supply pipe 18a. Thus in the case of performing the automatic meter reading in a gas supply system, as shown in FIG. 14, one of the plurality of the controllers 17a gas meter 17b ₁ ～17Bn
Connect once more the gas meter 17b ₁ ～17Bn for example a month from the controller 17a, and requests the transmission of meter reading data in a predetermined day time was collected in order from a plurality of the gas meter in response to the request door to door The meter reading data is notified to the information center 11 every time.

However, as described above, the remaining amount monitoring function of each gas meter cannot monitor the remaining amount of gas in the gas cylinder shared by a plurality of houses.

[0015] Therefore, in view of the above situation, the present invention measures the gas consumption of each house, such as an apartment house or a two-family house, from a common gas cylinder, and measures the meter reading value via a communication line. An automatic meter reading and notifying device that automatically reports to an information center, a gas remaining amount monitoring device that can monitor the remaining amount of gas in a common gas cylinder and notify the information center when the remaining amount reaches a warning level. The task is to provide.

[0016]

Means for Solving the Problems In order to solve the above problems, the gas remaining amount monitoring device in the automatic meter reading and notifying device according to the first aspect of the present invention, as shown in the basic configuration diagram of FIG. a plurality of terminals TA ₁ ~TAn can connect a plurality of the gas meter 31 ₁ ~31n having a metering function and a communication function to output a meter reading values and metered amount of gas supplied from the gas cylinder to each household, the plurality of terminals Meter reading reading means 301a for reading the meter reading of the connected gas meter.
1, a reporting means 302 for reporting information to a designated reporting destination 1 via a communication line 4, and reading a meter reading value of a gas meter connected to the meter reading value reading means at a predetermined date and time of each month, An automatic meter reading and notifying device 30 having a meter reading means 301a-2 for making the notifying means notify the designated notifying destination via the communication line of the read meter reading value as information, wherein the gas cylinder has a predetermined amount of gas. A cylinder replacement operation means 307d which is manually operated when a new gas cylinder is replaced, a remaining amount management counter 301d-1 which is cleared to zero in response to the operation of the cylinder replacement operation means, and a plurality of remaining amount management warning levels are stored. The meter reading value of the gas meter connected to the warning level storage means 301d-2 and the gas meter connected to the meter reading value reading means is read at least once a day at a predetermined time. And the remaining amount management means 301a-3 that,
The remaining amount management means calculates a difference between a meter reading value sequentially read by the meter reading value reading means and a previous meter reading value corresponding to the meter reading value, and adds the calculated difference for all gas meters. Calculating means 301a-4 for adding a value to the remaining amount management counter; comparing the counter value of the remaining amount management counter with the plurality of remaining amount management warning levels stored in the warning level storage means; Determining means for determining whether or not the counter value is equal to or higher than the remaining amount management warning level, and causing the notifying means to notify the designated notification destination each time it is determined that the counter value has exceeded the warning level;
5 is provided.

With the above configuration, in the automatic meter reading and notifying device 30, a plurality of gas meters 31 _{1 to} 31 n have a measuring function and a communication function of measuring the amount of gas supplied from a gas cylinder to each house and outputting a meter reading value. Meter reading means 301a-2
At a predetermined date and time of each month.
1 reads the meter readings of a plurality of gas meters 31 _{1 to} 31 n connected to the plurality of terminals TA ₁ to TA n, and uses the read meter readings as information as information to the communication means 302.
Since the information is reported to the designated report destination 1 via the, the automatic meter reading can be performed.

Further, the remaining amount management means 301a-3 at least once a day at a predetermined time at a predetermined time.
a-1 to thereby read out the meter reading value of the gas meter 31 ₁ ~31n, calculating means the difference between 301a-4 is the meter reading value read from the previous meter reading value corresponding to the meter reading value is calculated, all the calculated differences adding the gas meter 31 ₁ ~31n, it adds the added value on the remaining amount management counter 301d-1. When the gas cylinder is replaced with a new gas cylinder having a predetermined amount of gas, the remaining quantity management counter 301d-1 is cleared to zero when the cylinder replacement operation means 307d is manually operated. Of the gas supplied through the gas meters 31 _{1 to} 31 n after the gas cylinder replacement.

Further, the judging means 301a-5 compares the counter value of the remaining amount management counter 301d-1 with a plurality of remaining amount management warning levels stored in the warning level storage means 301d-2. It is determined whether or not the warning level is equal to or higher than the remaining level warning level. Each time it is determined that the warning level is exceeded, the notification means 302 is notified to the specified notification destination. It is possible to know the remaining amount, monitor and manage the remaining amount of gas, and issue an instruction for gas cylinder replacement when necessary.

According to a second aspect of the present invention, there is provided a gas remaining amount monitoring apparatus according to the present invention for solving the above-mentioned problems, as shown in the basic configuration diagram of FIG. Each time the counter value of the remaining amount management counter becomes equal to or more than each of the plurality of remaining amount management warning levels, the determination unit sets information indicating that, and operates the cylinder replacement manual unit after the end of the notification. A plurality of first information areas 301c-1 that are reset in response to the information, and information indicating that all of the plurality of first information areas have been set and the notification has been completed are set. A second information area 301c-2 that is reset in response to an operation of the means, and resets the plurality of first information areas when information is set in the second information area. Kizanryou management counter is cleared to zero, and wherein the set state of said first and second information area be the information when the notification to the specified report destination by the notification means.

According to the above configuration, the determining means 301a-5 has a plurality of first information areas 301c-1 and a plurality of second information areas 301c-2. The plurality of first information areas 301c-1 include a remaining amount management counter 301d-
Each time the counter value of 1 becomes equal to or more than each of a plurality of remaining amount management warning levels, information indicating that is set, and is reset in response to the operation of the cylinder replacement manual unit 307d after the notification is completed. I have. In the second information area 301c-2, information indicating that all of the plurality of first information areas have been set and the notification has been completed is set. In response to the operation of the cylinder replacement manual means 307d, It is to be reset. Moreover, the judgment means 30
1a-5 resets the plurality of first information areas when the information is set in the second information area 301c-2, clears the remaining amount management counter 301d-1 to zero, and sets the first and second information areas. 301c-1 and 301
The set state of c-2 is used as information at the time of reporting to the designated reporting destination by the reporting means 302.

Accordingly, even after all of the plurality of first information areas have been set and the notification has been completed, the cylinder replacement manual means 3 can be used.
07d is not operated, when the counter value of the remaining amount management counter 301d-1 becomes equal to or higher than the remaining amount management warning level and a notification to that effect is given,
Of the information area 301c-2 is notified, and even if the gas cylinder replacement work is performed, if such information is reported, the destination of the report is the cylinder replacement operation means 307d at the time of gas cylinder replacement. It is possible to know that the manual operation has not been performed, and it is possible to monitor and manage the remaining gas amount in consideration of this fact.

According to a third aspect of the present invention, there is provided a gas remaining amount monitoring apparatus according to the present invention for solving the above-mentioned problems, as shown in the basic configuration diagram of FIG. In response to an operation at an arbitrary time, the meter reading value reading means is caused to sequentially read the meter reading values of the gas meters connected to the plurality of terminals, and the read meter reading value and the previous meter reading value corresponding to the calculating means are used. And a reset operation unit 307c for adding the calculated difference to all the gas meters and adding the added value to the remaining amount management counter.

With the above configuration, the reset operation means 307
c is a meter reading value reading means 301 according to an operation at an arbitrary time.
a-1 sequentially reads the meter readings of the gas meters 31 _{1 to} 31 n connected to the plurality of terminals TA ₁ to TA n, and calculates the difference from the previous meter reading corresponding to the calculating means 301a-4 based on the meter readings. At the same time, the difference is added to all the gas meters 31 _{1 to} 31 n, and the added value is added to the remaining amount management counter 301 d-1.
By operating the reset operation means 307c at any time, it is possible to freely exchange the connected gas meter at any time.

According to a fourth aspect of the present invention, there is provided a gas remaining amount monitoring apparatus according to the present invention for solving the above-mentioned problems, as shown in the basic configuration diagram of FIG. Terminal information setting means 30 for setting information on a terminal to which a gas meter is connected among a plurality of terminals
8, the reset operation means causes the meter reading value reading means to sequentially read the meter reading value of the gas meter from the terminal to which the connection is set by the terminal information setting means in accordance with an operation at an arbitrary time, A difference from the previous meter reading value corresponding to the calculation means is calculated based on the read meter reading value, the calculated difference is added for all gas meters, and the added value is added to the remaining amount management counter. And

With the above configuration, the terminal information setting means 308
Is to set information on the terminal to which the gas meter is connected among a plurality of terminals. Therefore, after changing the setting by the terminal information setting means 308, it is necessary to add the gas meter and operate the reset operation means 307c. With this, it is possible to add a gas meter at any time,
After operating the reset operation means 307c at an arbitrary time, the setting by the terminal information setting means 308 is changed, the gas meter is removed, and then the reset operation means 3 is again operated.
By operating 07c, the gas meter can be removed at any time.

According to a fifth aspect of the present invention, there is provided a gas remaining amount monitoring apparatus according to the present invention for solving the above-mentioned problems, as shown in the basic configuration diagram of FIG. The arithmetic means is characterized in that when the calculated difference is negative, it is not added.

With the above configuration, the calculating means 301a-4
Is not added when the calculated difference is negative, so even if the meter reading of the new gas meter is small when replacing the gas meter,
We can respond to this.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas remaining amount monitoring device in an automatic meter reading and notifying device according to the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing a schematic configuration of an automatic gas meter reading system to which the present invention is applied. As shown in the figure, for example installed LPG seller respectively and LPG consumption destination and the information center 1 and the terminal device 3 ₁ 3n, tie between them a communication line such as a telephone line 2, 4, The terminal periodically reports gas meter readings to the information center,
The terminal notifies the information center that the remaining amount of the G cylinder is low.

In FIG. 1, an information center 1 comprises a host computer 1a, a transmitting / receiving device 1b, and a subscriber's telephone 1c, and is connected via a telephone line 2 to a nearest telephone exchange (not shown). Incorporating gas level monitoring device in an automatic meter reading reporting device according to the present invention the terminal device 3 ₁
3n have the same configuration, and each is connected via a telephone line 4 to a nearest telephone exchange (not shown). The information center 1 and the like LPG seller of example LPG delivery stations, each terminal unit 3 ₁ 3n are respectively arranged LPG consumption destination.

[0031] Figure 3 illustrates one 3 ₁ of 3 ₁ 3n terminal unit that is installed in collective housing, the terminal unit 3 ₁ and one automatic meter reading reporting device 30 as shown in FIG. 3 It has n gas meters 31 ₁ to 31 n. The telephone lines 4 (FIG. 2) are connected to the terminals L ₁ and L ₂ of the automatic meter reading and notifying device 30.
However, a subscriber telephone (not shown) is connected to terminals T ₁ and T _2.
A plurality of gas meters with microcomputers (hereinafter simply referred to as gas meters) 31 _{1 to} 31 n, each of which is installed in each home, are connected to the gas meter connection terminals TA _{1 to} TAn, respectively.

In the information center 1, the automatic operation of each terminal
Meter reading notification device 30 and gas meter 31 ₁~ 31n
The setting data for setting in the host computer 1
Created by key operation on the operation console (not shown)
This setting data is stored in the automatic meter reading
Meter 31₁When installing ~ 31n, from the information center 1 side
It is sent via the communication lines 2 and 4 in a predetermined message format.
Automatic meter reading notification device 30 and gas meter 31₁Within 31n
Is set.

As shown in FIG. 3, the automatic meter reading and notifying device 30 operates as a central processing unit (CP) which operates according to a flowchart described later based on a predetermined control program.
U) 301a, a read-only memory (ROM) 301b storing a control program, and a random access memory (RAM) 30 storing various data.
1c, an electrically rewritable programmable read only memory (PROM) 301 in which various setting data are stored and whose storage contents can be held without a backup power supply
CPU that generates d, date and time (real time) data
A microcomputer (MPU) 301 having a built-in clock / calendar 301e to be supplied to 301a is provided. Note that the content of the counter of the clock / calendar 301e is CP
Rewritten by data supplied from U301a,
The year, month, day, hour and minute data generated by the clock / calendar 301e can be corrected.

A modem (modulation / demodulation circuit) 302 is connected to an input / output parallel port of the MPU 301 via a data bus, and is transmitted via the telephone line 4 with 4-bit parallel data representing 0 to F which can be processed by the MPU 301. Performs conversion to and from signals. As the signal, for example, an FSK signal representing 0 to F in a combination of signals of two frequencies may be used. Gas meters 31 _{1 to} 31 n are connected to the n input / output serial ports of the MPU 301.

The output of the battery voltage drop detection circuit 303 is directly supplied to the input port of the MPU 301 by the 16 Hz detection circuit 3.
04 and the output of the TEL detection circuit 305 are
They are connected via C ₁ and PC ₂ respectively. The battery voltage drop detection circuit 303 is, for example, a 3V lithium battery 3.
The MPU 301 detects that the voltage 06 has dropped below a certain value and outputs a detection signal. The MPU 301 reads this detection signal through the input port. The output voltage of the DC-DC converter 306a that boosts the voltage of the lithium battery 306 is M
The power is supplied to each unit as the operation power supply of the PU 301 itself and other units.
Are supplied by a control signal 01 of the output port via the switching transistor Q ₁ is turned on and off. Note that the DC-DC converter 306
The operation of a is also controlled on / off by a control signal from the output port of the MPU 301.

Both inputs of the 16 Hz detection circuit 304
Means that the MPU 301 is always
Interlocking changeover switches that can be switched under your control
SW ₁And SW_TwoTerminal to which telephone line 4 is connected via
L_TwoAnd L₁And the phone is connected
Terminal T₁And T_TwoOn the other hand T_TwoIt is connected to the. Soshi
The 16 Hz detection circuit 304 is externally connected through the telephone line 4.
16H indicating that incoming call is being input from
Detects the call signal of z and converts the incoming call detection signal to a photocoupler
PC₁And this detection signal is sent to the MPU 301
Therefore, it is read.

Further, one input of TEL detection circuit 305, together with one of the telephone line 4 through the switch SW ₁ is connected to one terminal L ₁ connected and the other input is connected to the phone that it is connected to the other terminal T _1. Then, TEL detection circuit 305 is output through the photocoupler PC ₂ a detection signal being used to detect that the subscriber telephone set is in use, the detection signal is MPU30
1 is read.

The other input ports of the MPU 301 are used to start a test for checking the communication function of the automatic meter reading / reporting device 30 with respect to the information center 1 and one of the gas meters 31 _{1 to} 31 n. A test switch 307a that is turned on when ending a wrong connection test for checking whether the gas meters 31 _{1 to} 31n are incorrectly connected to the gas meter 30 and an on operation when resetting the operation of the MPU 301 to start from an initial state The reset switch 307b receives data sent from the information center 1 as setting data, stores it in a predetermined area of the RAM 301c as its own setting data, and sets the gas meter 3 as setting data for the gas meter.
The data setting switch 307c and the gas meter 31 ₁ which are turned on when storing the data in the corresponding _{one of} 11 1 to 31 n.
The gas cylinder (not shown) containing the gas to be supplied to each house through ~ 31n is exhausted,
Alternatively, a cylinder replacement switch 307d as a cylinder replacement operation means that is turned on when the battery is replaced with a new one is connected.

Further, another input port of the MPU 301 is connected to M gas meters 31 ₁ to 31 n in order to connect M gas meters 31 ₁ to 31 n.
N for setting which input / output port is actually connected to the gas meter among the n input / output ports (gas meter connection terminals) TA _{1 to} TAn provided in PU 301.
A dip switch 308 as terminal information setting means having a plurality of contacts is connected via a multiplier 308a. Another input port of the MPU 301 has M
In addition to the contact a for the normal mode, the operation of the PU 301, the contact b for the abnormality inspection mode for inspecting the abnormality of the connection with the gas meters 31 _{1 to} 31 n and the abnormality of the gas meter itself, and the incorrect connection of the gas meter to the automatic meter reading notification device. A mode changeover switch 312 having a contact c for an incorrect connection inspection mode for checking whether or not there is a contact and a contact d for other modes, and selecting and switching these modes.

The n contacts of the DIP switch 308 have gas meters 31 _{1 to} 31 n depending on the off state.
Is provided to the MPU 301 with respect to the gas meter connection terminal that is not connected. This information is used when the MPU 301 performs an abnormality inspection process for communicating with the gas meter at the beginning of its operation to check for an abnormality in connection with the gas meters 31 ₁ to 31 n and an abnormality of the gas meter itself, When performing an incorrect connection inspection process to check whether the connection of the gas meter to the meter reading notification device is incorrect,
In order to prevent communication about the gas meter connection terminal to which the gas meter is not connected and to shorten the inspection time, determine whether the gas meter is correctly connected to the gas meter connection terminal to which the gas meter is to be connected. Used for and for.

The output port of the MPU 301
And the base of the switching transistor Q ₂ is connected via the photo-coupler PC _3, the photocoupler P switching transistor Q ₂ is under the control of MPU301
By being turned on via the C _3, telephone line 4
The connection to the full wave rectifier 309, a primary winding of the coupling transformer T through transistor Q ₂ L1. The secondary winding L2 of the coupling transformer T functions as a pseudo load for the telephone line 4, and the input / output of the modem 302 is connected to the secondary winding L2.

The output ports of the MPU 301 are connected to the control inputs of the switches SW ₁ and SW _{2 which} are linked to each other, and these switches SW ₁ and S
When W ₂ is the automatic meter reading reporting device 30 must inform the information center by the occurrence of a call event in the gas meter 31 ₁ ~31n, or, when receiving information from the information center, the output from the output port of the MPU301 The state is switched to the side opposite to the state shown in FIG.

Further, a two-digit numerical display 310 is connected to another output port of the MPU 301. The numeric display 310 indicates that an abnormality has occurred as a result of an inspection of a connection abnormality with the gas meter and an abnormality of the gas meter itself performed at the initial stage of the operation of the MPU 301 in response to the ON operation of the reset switch 307b and the power supply. When there is a gas meter that has been used, it is used for displaying, in order, the numbers of the gas meter connection terminals to which the gas meter is connected. The information displayed on the display 310 can be used to check the abnormal gas meter at the place where the automatic meter reading and notifying device 30 is installed, and it is not necessary to check it from the information center side. It is possible to eliminate the trouble of notifying the abnormal gas meter to the person at the site one by one.

Reference numeral 311 denotes a manual changeover switch.
In the state shown in the figure, the 16 Hz detection circuit 304 and the TEL detection circuit 3 are connected to the telephone line 4 together with the subscriber telephone.
05 or a full-wave rectifier 309, and only the subscriber's telephone is connected to the telephone line 4 in a state opposite to the illustration. Therefore, when the manual selector switch 311 is in the state shown, the changeover switch SW ₁ and SW ₂
Is switched from the illustrated state to the opposite side, the 16 Hz detection circuit 304 and the TEL detection circuit 305 are disconnected from the telephone line 4 together with the subscriber telephone, and only the full-wave rectifier 309 is connected instead. Data can be exchanged with the information center via the modem 302.

The functions performed by the MPU 301 according to a predetermined program include a gas meter reading function, a battery voltage drop detection function, a clock and calendar function, a transmission control function, a gas remaining amount management function, a setting data setting function, and the like. It has an abnormality inspection function and an incorrect connection inspection function.

The setting data setting function described above stores the setting data necessary for the operation of the automatic meter reading and notifying device 30 and the gas meters 31 _{1 to} 31 n in the MP meter in the automatic meter reading and notifying device 30.
PROM 301d in U301 and gas meters 31 _{1 to} 3
1n. As shown in FIG. 4, the setting data includes a customer code (ID), a report destination (information center) telephone number, a telephone system (different type, push button type), a current date, a current time, a report time, Automatic meter reading and notification device 3 for items No.1 to No.22 and No.26 such as remaining amount management warning level and remaining amount management counter value
And the gas meter 31 _{1 to} 3 of the No. 23 to No. 25 items such as the meter control code value etc.
It consists of meter setting data set to 1n. The information center manages the automatic meter reading and notifying device and the gas meter based on the customer code (ID). The above-described notification setting data is stored in a predetermined area of the PROM 301d, and the meter setting data is stored in a memory in an MPU (not shown) in the gas meter.

The format of the message sent from the information center to the automatic meter reading and notifying device and from the automatic meter reading and notifying device to the information center is the format shown in FIG. 5, and the instrument number of the gas meter is written in the message format. There is a meter type storage unit (hereinafter referred to as a device number unit). This device number is a code number stored in advance in a memory in the microcomputer of the gas meter according to the type such as the size of the gas meter,
This is used when the information center wants to know the type of gas meter.

The gas remaining amount management function is designated when the gas usage amount is integrated based on the meter reading values read out from the gas meters 31 _{1 to} 31 n connected to the automatic meter reading and notifying device, and when the gas usage amount exceeds a predetermined warning level. This is a function for notifying a report destination such as an information center. For this, M
The PU 301 sets the reporting time of No. 7 and the reporting time of No. 19 in the setting data for reporting stored in the predetermined area of the PROM 301 d.
Using the remaining amount management warning level of No. 21 and the remaining amount management counter value of No. 22, once a day at the reporting time, the gas meters 31 _{1 to} 3 are turned on by the DIP switch 308.
1n the sends out a "metering data request" message in order for the connected know of it has a gas meter connection terminal TA ₁ ~TAn read meter reading data as meter reading value, meter reading data and the day before the read-out The difference between the calculated meter reading data and the calculated meter reading data is calculated, and the calculated difference is added by an addition counter formed in a predetermined area of the RAM 301c in the MPU 301, and the differences for all the connected gas meters are calculated. When the addition is completed, the addition value of the addition counter is added to the remaining amount management counter value in the PROM 301d.

When the cylinder replacement switch 307d is turned on when a gas cylinder (not shown) as a fuel container is replaced, 0 liter is set in the "remaining management counter setting" message from the information center. When it is performed, or when all the remaining amount management warning flags (described later) are set, the contents thereof are cleared to zero. It should be noted that the remaining amount management warning flag corresponds to each of the remaining amount management warning levels 1 to 3, and the RAM 30 in the MPU 301
A plurality of first information areas are provided in a predetermined area 1c.

When a data type "remaining amount management counter value request" message as shown in FIG. 6 is input from the information center, the value is read from the remaining amount managing counter, and an automatic meter reading notification device is sent as a response to this request. Sends a "residual amount management counter value response" message as shown in FIG. 7 to the information center. When a value is set to the remaining amount management counter in the PROM 301d, a message "setting of remaining amount management counter value" as shown in FIG. 8 is input from the information center to the automatic meter reading notification device. Then, a “set response” or an “undefined response” message is transmitted depending on whether the setting data of the remaining amount management counter value is correctly set.

Of the notification setting data stored in the predetermined area of the PROM 301d, the three remaining management warning levels No. 19 to No. 21 can also be read from the information center and set. When setting and reading the remaining warning level,
From the information center, a “remaining amount management warning level value request” message of the same data type as shown in FIG. 6 is input. Then, as a response to this request, the automatic meter reading / reporting device sends a "residual level warning level response" similar to that shown in FIG. 7 to the information center.
Send a message. When a value is set in the remaining amount management counter in the PROM 301d, a message of "setting remaining amount warning level value" of the same data type as that shown in FIG. 8 is input from the information center to the automatic meter reading notification device. Then, a “set response” or an “undefined response” message is transmitted depending on whether the setting data of the remaining amount management warning level value is correctly set.

When a remaining amount management warning message is issued by the gas remaining amount management function, a warning judgment is made by comparing the remaining amount management counter value with each of the remaining amount management warning levels 1 to 3. When the remaining amount management counter value exceeds each remaining amount warning level, a notification is made to the notification destination specified by the notification destination (information center) telephone number of No. 2 item in the notification setting data, If the quantity management warning level is all zero, no comparison is made for the warning determination. For the report data, bits corresponding to each level of the security data are set in a set state according to the state of the remaining amount management warning flag described above.

As described above, when all the remaining amount management warning flags corresponding to the remaining amount management warning level are set, the remaining amount management counter is cleared to zero. The relationship with levels 1 to 3 will be described below with reference to FIG.

At time t1, the operation of the cylinder replacement switch causes the remaining amount management counter value to be zero, and thereafter the gas usage is integrated as seen at time t2, and the remaining amount management counter value is indicated by the diagonal line. When the value increases and finally reaches the remaining amount management warning level 1 or more at time t3, the remaining amount warning flag 1 is set and this is reported.
Subsequently, when the remaining amount management counter value becomes equal to or higher than the remaining amount management warning levels 2 and 3 at the time points t4 and t5, the remaining amount warning flags 2 and 3 are set and reported respectively, and the remaining amount warning flags are set as described above. Clears the management counter to zero.

Then, at the time when the notification made by setting the remaining amount warning flag 3 is completed or when the retry is completed, t
In step 6, all remaining amount warning flags are reset and a reset request flag (described later) is set.
The remaining amount management counter cleared to zero accumulates the subsequent gas usage, and waits for gas cylinder replacement and subsequent operation of the cylinder replacement switch. If the cylinder replacement switch is operated at time t7, the remaining amount management counter value is cleared to zero, all remaining amount warning level flags are reset, and the above-described operation from time t1 is repeated. In addition, even if the gas cylinder is replaced by the notification made in accordance with the setting of the above-mentioned remaining amount warning flag 3, if the operation of the cylinder replacement switch is forgotten, the remaining amount management counter is not cleared to zero, and at time t8. It becomes the remaining amount management warning level 1 or higher. In this case, the remaining amount warning flag 1 is set and reported, but at this time, the reset request flag that has been set is also reported due to forgetting to operate the cylinder replacement switch.

Therefore, the information center that has received the report data can determine that the reset has been forgotten, that is, the operation of the cylinder replacement switch has been forgotten. Note that the reset request flag is provided as a second information area in a predetermined area of the RAM 301c in the MPU 301.

As described above, four flags of the remaining amount warnings 1-3 and the reset request are prepared in association with the residual management warning. The remaining amount warning 1 flag is set when the remaining amount management counter reaches the set remaining amount warning level 1, and when the cylinder replacement switch is turned on after the notification, the remaining amount management counter is set to “0”. Or when the residual warning level 1 is set to "0", and also when the cylinder replacement switch is turned on during the retry operation without ending the notification. Is done.

The remaining amount warning flag 2 is set when the remaining amount management counter reaches the set remaining amount warning level 2, and when the cylinder exchange switch is turned on after the notification is completed, the remaining amount management flag is set to the remaining amount management counter. Reset when "0" is set or when "0" is set to the residual warning level 2, and when the cylinder change switch is turned on during retry operation without ending the notification Is also reset.

The remaining amount warning flag 3 is set when the remaining amount management counter reaches the set remaining amount warning level 3, and is set to the remaining amount management counter when the cylinder exchange switch is turned on after the notification is completed. Reset when "0" is set or when "0" is set to the residual warning level 3, and when the cylinder change switch is turned on during the retry operation without ending the notification Is also reset.

The reset request flag is set when a report is completed or all retries are completed with all of the set residual warning flags set, and the reset request flag is set when the cylinder replacement switch is turned on or the remaining amount management counter is set. Reset when "0" is set.

The details of the gas remaining amount management function of the automatic meter reading and notifying device described above are shown in FIGS. 10 and 11 showing processing performed by the CPU 301a in accordance with a predetermined control program.
This will be described below with reference to the flowchart of FIG.

The CPU 301a starts operation when the power is turned on, and determines whether or not there is a signal input by operating the reset switch 307b in the first step S1. If the determination in step S1 is NO, the process proceeds to step S2 to determine whether the time of the clock / calendar 301e is the notification time set as the notification setting data. If the determination in step S2 is also NO, the process proceeds to step S3 and the cylinder replacement switch 307
It is determined whether there is a signal input by the operation d. If the determination in step S3 is also NO, the process proceeds to step S4 to determine whether there is another input signal.

If there is no other signal input and the determination in step S4 is also NO, the process returns to step S1 and repeats the processing in steps S1 to S4. There are other signal inputs,
When the determination in step S4 is YES, the process proceeds to step S5 to perform a process according to the signal input, and then returns to step S1 to repeat the processes in steps S1 to S4.

In the course of the processing of steps S1 to S4, the CPU 301a receives a signal input by operating the reset switch 307b, and the determination in step S1 is YES.
When S is reached, or when the time of the clock / calendar 301e is the notification time and the determination in step S2 is YES, the process proceeds to step S6, where a message requesting meter reading data is sent to the gas meters 31 _{1 to} 31n. The meter reading data step-by-step output from each gas meter in response to this request is collected, and stored and stored in a predetermined meter reading data storage area of the RAM 301c. In this step S6, the gas meter that sends out the telegram requesting the meter reading data is designated by the on state of the dip switch 308.

By the processing described above, the CPU 301a
Is the remaining amount management means 301a
-3 and as the meter reading value reading means 301a-1 by the processing in step S6. The meter reading data storage area includes a current data storage area and a previous data storage area. The latest meter reading data collected in step S6 is stored in the present data storage area, and the previously collected meter reading data is stored in the previous data storage area. Have been.

Thereafter, the flow advances to step S7 to determine whether or not the date of the clock / calendar 301e is the report date set as the report setting data. When the determination is N0, the process proceeds to step S8, and when the determination is YES, the process proceeds to step S9 to set the notification confirmation flag and then proceeds to step S8. Therefore, the CPU 301a executes the steps S7 and S9 to execute the meter reading means 3
Work as 01a-2.

In step S8, the RAM 30
The contents of the addition counter formed in the predetermined area 1c are cleared to zero. Thereafter, the process proceeds to step S10, where the gas meters 31 _{1 to} 31 n are obtained from the current data storage area and the previous data storage area of the RAM 301c in which the meter reading data is collected and stored in step S6.
Are read in order, and in the following step S11, the difference Δi between the current meter reading value and the previous meter reading value is calculated. In the next step S12, it is determined whether or not the difference Δi calculated in step S11 is positive.
If the determination in step S12 is YES, step S
Proceeding to step S13, the difference Δi calculated in step S11 is added to the counter value of the addition counter formed in the predetermined area of the RAM 301c, and then step S14 is performed.
When the determination in step S12 is NO, step S13 is skipped and the process proceeds to step S14.

In step S14, it is determined whether or not the processing has been completed for all the gas meters 31 _{1 to} 31n.
The processes in steps S10 to S13 are repeated until S is reached, and as a result, the total value of the difference Δi between the current meter reading value and the previous meter reading value for all the gas meters 31 _{1 to} 31n is obtained in the addition counter. If the determination in step S14 is YES, the process proceeds to step S15, where P
The total value of the addition counter is added to the counter value of the remaining amount management counter in the ROM 301d. Steps S10 to S
By the processing of No. 14, the CPU 301a
Works as 1a-4.

Subsequently, the flow advances to step S16 to determine whether or not the processing in steps S8 to S15 is performed when the determination in step S1 is YES, ie, the processing performed by operating the reset switch 307b. Is determined. When the determination in step S16 is YES, the process returns to step S1. When the determination is NO, the process proceeds to step S17 to perform a warning determination process routine (described later), and then proceeds to step S18 to determine whether or not a reporting factor has occurred. Is determined. This step S1
If the determination of No. 8 is N0, the process returns to step S1. If the determination is YES, the process proceeds to step S19 to perform a notification process. In the next step S20, the notification determination flag that has caused the notification in step S19 is cleared. After resetting, the process returns to step S1 to repeat the above processing.

If the report in step S19 is a regular meter reading report, a meter reading value message is created in the report process, and if the report is a warning report, a message containing information for giving a warning in the report process is created. Calls the information center by automatically dialing the report destination telephone number stored as the setting data for the telephone, connects the telephone line to the information center, and connects the modem 302 as a report means to the designated report destination via the communication line. The above information will be reported in the created message.

If the determination in step S3 is YES, that is, if there is a signal input by operating the cylinder replacement switch 307d, the process proceeds to step S21, where the counter value of the remaining amount management counter is cleared to zero, and a predetermined area of the RAM 301c is determined. After resetting the various flags formed in step S1, the process returns to step S1 to repeat the above processing.

Next, the warning determination processing routine of step S17 will be described with reference to the flowchart of FIG. By executing this routine, the CPU 301a functions as the determination unit 301a-5, and first, the first step S
In 17a, it is determined whether or not the remaining amount management warning level 1 set as the notification setting data in the PROM 301d is 0. The determination in step S17a is YE
In the case of S, that is, if the set remaining amount management warning level 2 is 0, the process proceeds to step S17e, and it is determined whether the remaining amount management warning level 2 is 0 this time. If the determination in step S17e is YES, step S1
Proceeding to 7i, it is determined whether or not the remaining amount management warning level 3 is 0. If the determination in step S17i is YES
In other words, when the remaining amount management warning level 3 is 0, the process proceeds to step S17n, and it is determined whether all of the remaining amount management warning levels 1 to 3 are 0. When this determination is YES, It returns to the main routine of FIG.

When the determination in step S17n is NO, the process proceeds to step S17p to determine whether the reset request flag is set. This step S17
When the determination of p is N0 and the reset request flag is not set, the process proceeds to step S17q to determine whether all the flags of the remaining amount warning levels 1 to 3 are set. When the determination in step S17q is NO, the process returns to the main routine in FIG. On the other hand, step S17q
Is YES, that is, the remaining amount warning levels 1 to
When all the flags of No. 3 have been set, the process proceeds to step S17r, where the remaining amount management counter is cleared to zero, the reset request flag is set, and the process returns to the main routine of FIG.

When the determination in step S17a is N0, that is, when the remaining amount management warning level 1 is set, the process proceeds to step S17b to determine whether or not the remaining amount warning level 1 flag is set. If the determination in step S17b is YES, the above-described step S17b is executed.
Proceeds to 17e, and if the determination is NO, step S17c
To determine whether or not the counter value of the remaining amount management counter is greater than the value of the remaining amount management warning level 1. When the determination in step S17c is N0, step S1 is performed.
7e, while the determination in step S17c is YES.
If so, the process proceeds to step S17d, and the remaining amount warning level 1 is set.
After setting the flag and setting the report confirmation flag, the process proceeds to step S17e.

When the determination in step S17e is N0, that is, when the remaining amount management warning level 2 is set, the process proceeds to step S17f to determine whether the remaining amount warning level 2 flag is set. If the determination in step S17f is YES, the above-described step S17f
17i, and if the determination is NO, step S17g
Then, it is determined whether or not the counter value of the remaining amount management counter is larger than the value of the remaining amount management warning level 2. When the determination in step S17g is N0, step S1 is performed.
7i, while the determination in step S17g is YES
If so, the process proceeds to step S17h, and the remaining amount warning level 2 is set.
After setting the flag and setting the report confirmation flag, the process proceeds to step S17i.

When the determination in step S17i is N0, that is, when the remaining amount management warning level 3 is set, the process proceeds to step S17j to determine whether the remaining amount warning level 3 flag is set. If the determination in step S17j is YES, the above-described step S17j
17n, and when the determination is NO, step S17k
To determine whether or not the counter value of the remaining amount management counter is greater than the value of the remaining amount management warning level 3. If the determination in step S17k is NO, the above-described step S1
7n, while the determination in step S17k is YES
In the case of, the process proceeds to step S17m, and the remaining amount warning level 3
Is set and the notification confirmation flag is set, and then the process proceeds to step S17n, and the process proceeds to step S17n.
17n to S17r are performed.

Steps S17d, S17h and S1
By setting the report confirmation flag at 7m, the determination in step S18 in the flowchart of FIG. 10 is YES, that is, a passing factor has occurred, and the remaining amount warning levels 1 to 3 for which the report confirmation flag is set are set. Is performed in the next step S19. When the notification ends normally, in the next step S20,
The notification confirmation flag set in steps S17d, S17h and S17m is reset.

As is clear from the above description of the flow chart, by appropriately operating the reset switch 307b and the DIP switch 308, the gas meter can be freely replaced, added, or removed during operation. The method will be described below.

First, when replacing the gas meter, the reset switch 307b is turned on. According to this, the meter reading value of the connected gas meter is read and added to the remaining amount management counter. After that, the gas meter to be replaced is removed, the gas meter to be replaced is installed there, and the reset switch 307b is turned on again. In response to the ON operation of the reset switch 307b, the meter reading value of the gas meter is read and added to the remaining amount management counter. If (the meter reading value of the removed gas meter ≧ the meter reading value of the attached gas meter), the meter reading value of the attached gas meter−the meter reading value of the removed gas meter becomes negative, and therefore, is not added to the remaining amount management counter. . On the other hand, if (the meter reading of the removed gas meter <the meter reading of the installed gas meter), then the meter reading of the installed gas meter minus the meter reading of the removed gas meter is positive, so that it is added to the remaining amount management counter. Is done. Therefore, at the time of replacement, care must be taken in operation so that the meter reading of the removed gas meter ≥ the meter reading of the attached gas meter.

Next, when adding a gas meter, the DIP switches 308 corresponding to the input / output ports of the gas meter connection terminals TA _{1 to} TAn to be added are turned on. Subsequently, a gas meter is installed, and the gas meter is connected to the gas meter connection terminal. Thereafter, when the reset switch 307b is turned on, the meter reading value of the connected gas meter is read and added to the remaining amount management counter. Here, since the meter reading value is not read from the input / output port in which the dip switch 308 is in the off state, the value becomes zero. At the time of calculating the difference from the previous meter reading value, if the previous meter reading value is zero, it is not added to the remaining amount management counter value.

Finally, when removing the gas meter,
First, the reset switch 307b is turned on, and the meter reading value of the connected gas meter is read out in accordance with this operation and added to the remaining amount management counter. Subsequently, the dip switch 308 of the input / output port corresponding to the gas meter to be removed is turned off, and then the gas meter is removed. Thereafter, when the reset switch 307b is turned on again, the meter reading value of the connected gas meter is read and added to the remaining amount management counter. Thereafter, the reading from the input / output port where the dip switch 307b is off is not performed.

As described above, since the gas meter can be replaced, added, or removed during operation, it is possible to easily cope with replacement when the gas meter is updated. In addition, when residents move frequently, such as in rental apartments, it is possible to apply the temporary shut-off and opening of the gas meter in response to removal and expansion, respectively. It is sufficient that only the DIP switch 308 is turned on and off without performing additional operation.

[0083]

As described above, according to the first aspect of the present invention, meter reading values of a plurality of gas meters connected to a plurality of terminals are read at a predetermined date and time of each month, and the read values are read. Since the information is reported to the designated report destination via the communication line using the meter reading value as information, automatic meter reading can be performed. Also, at least once a day at a predetermined time, a plurality of gas meter readings are read, a difference between the read meter reading and the previous meter reading corresponding to the meter reading is calculated, and the calculated difference is calculated. The addition is performed for all gas meters, and the added value is added to the counter value, and this counter value is cleared by manual operation when the gas cylinder is replaced with a new gas cylinder having a predetermined amount of gas. The counter value indicates the amount of gas consumed after gas cylinder replacement supplied through all gas meters, and compares the counter value with a plurality of remaining level management warning levels. Each time it is determined that the warning level has been exceeded, the designated notification destination is notified. Even if they are shared in the same way, the report destination can know how much gas is remaining in the common gas cylinder, monitor the gas remaining and manage it, and if necessary, Instructions for gas cylinder replacement can be given.

According to the second aspect of the present invention, even when all of the plurality of remaining amount management warning levels are set and the notification is completed, if there is no operation after replacing the cylinder, the counter value is again set to the remaining amount management warning level. When the notification is made when the level is equal to or higher than the level, the set state of the information indicating that all of the plurality of remaining amount management warning levels have been set will also be notified. Even if the replacement work is performed, when such information is reported, it is possible to know at the report destination that manual operation was not performed at the time of gas cylinder replacement, and monitoring of the remaining gas amount taking this into account. Can manage.

According to the third aspect of the present invention, the meter reading values of the gas meters connected to the plurality of terminals are sequentially read in accordance with the operation at an arbitrary point in time, and the corresponding meter reading values of the preceding meter are read based on the meter reading values. Is calculated, and this difference is added for all gas meters, and this added value is added to the counter value. By operating at any time, the connected gas meter can be freely replaced at any time. It is possible.

According to the fourth aspect of the present invention, information relating to the terminal to which the gas meter is connected among the plurality of terminals is set, so that after changing the setting, the gas meter is added and operated. By doing so, it is possible to add a gas meter at any time, and after operating at any time, change the setting and remove the gas meter,
Thereafter, by operating again, the gas meter can be removed at any time.

According to the fifth aspect of the present invention, since the difference is not added when the calculated difference is negative, even if the meter reading of a new gas meter is small when the gas meter is replaced, it can be handled.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of a gas remaining amount monitoring device in an automatic meter reading and notifying device according to the present invention.

FIG. 2 is a block diagram showing a simplified configuration of the entire configuration of the automatic gas metering system to which the present invention is applied.

FIG. 3 is a diagram showing a circuit configuration of an embodiment of an automatic meter reading notification device to which the gas remaining amount monitoring device of the present invention is applied.

FIG. 4 is a diagram showing an example of setting data set in a PROM in the device of FIG. 3;

FIG. 5 is a diagram showing a message format in communication between the information center and the automatic notification device.

FIG. 6 is a diagram showing a message format of a remaining amount management counter value request from an information center.

FIG. 7 is a diagram showing a message format of a remaining amount management counter value response to the information center.

FIG. 8 is a diagram illustrating a message format of a remaining amount management counter value setting from the information center.

FIG. 9 is a diagram illustrating a relationship between a remaining amount management counter value and a remaining amount management warning level.

FIG. 10 is a flowchart showing a process performed by a CPU of the automatic meter reading notification device of FIG. 3;

FIG. 11 is a flowchart showing details of a part of FIG. 10;

FIG. 12 is a block diagram showing a general configuration of a meter reading system.

FIG. 13 is a diagram showing a gas supply system for supplying gas to a plurality of houses from a common gas cylinder.

FIG. 14 is a diagram showing a modification of a part of FIG. 12 when a plurality of gas meters are connected.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 Notification destination (information center) 4 Communication line (telephone line) 30 Automatic meter reading and notification device 31 _{1 to} 31n Plural gas meters 301a-1 Meter reading value reading means (CPU) 301a-2 Meter reading means (CPU) 301a-3 Remaining amount management Means (CPU) 301a-4 arithmetic means (CPU) 301a-5 determining means (CPU) 301c-1 a plurality of first information areas (RA
M) 301c-2 Second information area (RAM) 301d-1 Remaining amount management counter (PROM) 301d-2 Warning level storage means (PRO)
M) 302 Problem means (modem) 307c reset operating means (reset switch) 307d cylinder exchange operation unit (cylinder exchange switch) 308 terminal information setting means (DIP switch) TA ₁ ~TAn Multiple terminals

Continuation of the front page (56) References JP-A-7-23121 (JP, A) JP-A 8-317481 (JP, A) JP-A-62-276698 (JP, A) JP-A-1-98927 (JP) JP-A-61-239399 (JP, A) JP-A-5-290288 (JP, A) JP-A-7-66887 (JP, A) JP-A-7-87217 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G08C 15/00 H04Q 9/00 311 F17C 13/00 F17D 5/00 H04M 11/00 G01F 9/00

Claims (5)

(57) [Claims] 1. A plurality of terminals each of which can be connected to a plurality of gas meters each having a measuring function and a communication function for measuring a gas amount supplied to each door from a gas cylinder and outputting a meter reading value, and connecting to the plurality of terminals. Reading value reading means for reading the reading of the measured gas meter, reporting means for reporting information to a designated reporting destination via a communication line, and a gas meter connected to the reading value reading means at a predetermined date and time every month. A meter reading means for causing the notifying means to notify the specified notifying destination via the communication line of the read meter value as information, wherein the gas cylinder has a predetermined amount. A cylinder replacement operation means which is manually operated when replaced with a new gas cylinder having a gas of the above, a remaining amount management counter which is cleared to zero in response to the operation of the cylinder replacement operation means, A warning level storage unit storing a plurality of remaining amount management warning levels; and a remaining amount for reading the meter reading value of the gas meter connected to the gas meter connected to the meter reading value unit at least once a day at a predetermined time. Management means, calculating a difference between a meter reading value sequentially read by the meter reading value reading means by the meter reading means and a previous meter reading value corresponding to the meter reading value, and adding the calculated difference for all gas meters; Calculating means for adding the added value to the remaining amount management counter; comparing the counter value of the remaining amount management counter with the plurality of remaining amount management warning levels stored in the warning level storage means; Determining whether or not the counter value is equal to or higher than the remaining amount management warning level, and determining that the notification value is notified to a designated notification destination each time the determination is made that the counter value is equal to or higher than warning level. Gas level monitoring apparatus characterized by obtaining. 2. The information which is set each time the counter value of the remaining amount management counter becomes equal to or more than each of the plurality of remaining amount management warning levels, and A plurality of first information areas that are reset in response to operation of the cylinder replacement manual means, and information indicating that all of the plurality of first information areas have been set and the notification has been completed is set; A second information area that is reset in response to an operation of a cylinder replacement manual unit, wherein when the information is set in the second information area, the plurality of first information areas are reset and the remaining amount is reset. The management counter is cleared to zero, and the set state of the first and second information areas is used as information at the time of reporting to a designated reporting destination by the reporting means. Scan the remaining amount monitoring device. 3. A meter reading value reading means for sequentially reading a meter reading value of a gas meter connected to the plurality of terminals according to an operation at an arbitrary time, and the read meter reading value corresponds to the calculating means. The system according to claim 1, further comprising a reset operation unit for calculating a difference from a previous meter reading value, adding the calculated difference for all gas meters, and adding the added value to the remaining amount management counter. 2. The gas remaining amount monitoring device according to 2. 4. A terminal information setting means for setting information on a terminal to which a gas meter is connected among the plurality of terminals, wherein the reset operation means is configured to read the meter reading value means in response to an operation at an arbitrary time. To read the meter reading value of the gas meter sequentially from the terminal to which the connection is set by the terminal information setting means, and calculate the difference from the previous meter reading value corresponding to the calculating means based on the read meter reading value, 4. The gas remaining amount monitoring device according to claim 3, wherein the calculated difference is added to all the gas meters, and the added value is added to the remaining amount management counter. 5. The gas remaining amount monitoring apparatus according to claim 4, wherein said calculating means does not add when said calculated difference is negative.