JP7122501B2 - Wireless device for meters - Google Patents

Description

TECHNICAL FIELD The present invention relates to a meter wireless device for adding a communication function to a meter.

2. Description of the Related Art Wireless automatic meter-reading systems that automatically read meter readings of meters that measure the amount of utility usage such as gas, electric power, and water supply using radio or the like have been put to practical use.

Of these, gas and water meters are difficult to supply power to from commercial power sources, and therefore batteries are used as power sources, so power saving is required. In addition, from the perspective of visualization of energy usage, energy management including energy monitoring, and added value, it is possible to read more detailed usage by increasing the frequency of meter reading, read meter readings at short intervals, and develop new technologies. By adding sensors, we are trying to acquire various information and improve the value.

From these points of view, various methods have been studied to suppress the current consumption of the meter wireless device. As a communication method, a method has been proposed in which a LPWA (Low Power Wide Area) communication module is used to perform communication at all times or at short communication intervals. , and wireless devices for meters are required to have similar specifications, and power saving is desired. Also, from the perspective of added value, curtailment of current consumption and responsiveness are also important factors. and responsiveness (see, for example, Patent Document 1).

JP-A-2001-160990

However, although the above-mentioned conventional method can achieve a certain level of power saving, it is related to the transmission time limit on the base unit side and the reception interval of the meter wireless device, and the current consumption exceeds a certain level. It does not lead to suppression.

There is also a method of transmitting information to the base unit at the timing of the meter wireless device and acquiring the information from the base unit after the transmission. According to this method, the wireless device for the meter operates the communication portion in a resting state or in a low consumption mode except for the timing of transmission, thereby enabling power saving.

When this method is used to save power, the cycle in which the meter wireless device transmits information to the base unit is generally very long, and the timing of receiving a response from the base unit is also at that timing. As a result, the state of the meter cannot be determined for a long time, and even if data for changing the setting is received from the main unit, the changed setting cannot be reflected for a long time.

The present invention solves the above-mentioned conventional problems by changing the communication interval of the meter wireless device according to the gas appliance identified by the meter side appliance identification, thereby reducing the communication frequency to the minimum required. While ensuring the necessary responsiveness according to the gas appliance, it is possible to save power and maintain convenience.

In order to solve the above-mentioned conventional problems, the meter wireless device of the present invention includes a flow rate measurement unit that measures the flow rate of gas flowing through a flow path, and a device discrimination device that discriminates a gas appliance based on the flow rate measured by the flow rate measurement unit. a meter communication unit that communicates with a gas meter having a block and a shutoff valve that shuts off the flow path, and acquires at least the determination result of the instrument determination unit; a wireless communication unit that periodically performs wireless communication with the outside; a communication interval setting unit for setting a communication interval in the wireless communication unit, wherein the communication interval setting unit sets the communication interval according to the determination result obtained by the meter communication unit. is.

As a result, the communication interval of the meter wireless device is changed according to the gas appliance identified by the instrument identification on the meter side. It is possible to save power while ensuring the required power.

According to the meter wireless device of the present invention, the communication interval of the meter wireless device is changed according to the gas appliance identified by the meter side appliance identification, thereby ensuring the minimum required communication frequency. , it is possible to save power while ensuring the necessary safety performance.

1 is a block diagram of a wireless slave device and a gas meter connected to the wireless slave device by wire according to Embodiment 1. FIG. A diagram showing an example of communication interval setting according to Embodiment 1 FIG. 10 is a diagram showing communication interval setting according to the discriminated appliance in Embodiment 1; The figure which shows the communication interval setting according to the apparatus discriminate|determined in Embodiment 2.

A first invention has a flow rate measuring section that measures the flow rate of gas flowing through a flow path, an appliance determination section that determines a gas appliance based on the flow rate measured by the flow rate measuring section, and a shutoff valve that shuts off the flow path. A meter communication unit that communicates with a gas meter and acquires at least the result of determination by the instrument identification unit, a wireless communication unit that periodically performs wireless communication with the outside, and a communication interval setting unit that sets a communication interval in the wireless communication unit. and wherein the communication interval setting unit sets the communication interval according to the determination result obtained by the meter communication unit, and the gas appliance determined by the instrument determination on the meter side is characterized by In this way, it is possible to save power while ensuring the necessary security performance while ensuring the minimum required frequency of communication.

In a second invention, particularly in the first invention, the communication interval setting unit sets the communication interval to a preset first predetermined value when the determination result obtained by the meter communication unit indicates that the gas appliance is not used. If the determination result is the stove, the gas is continuously used at the first predetermined flow rate or more for the first predetermined time or longer, or at the flow rate that is less than the first predetermined flow rate and longer than the first predetermined time. The communication interval is set to be shorter than the first predetermined interval when the device is continuously used for a second predetermined time or longer.

In a third invention, particularly in the first invention, the communication interval setting unit sets the communication interval to a preset first predetermined value when the determination result obtained by the meter communication unit indicates that the gas appliance is not used. If the determination result is a fan heater, the communication interval is set to be shorter than the first predetermined interval only for a predetermined period when the flow rate measured by the flow rate measuring unit changes by a predetermined flow rate or more. It is characterized by

In a fourth aspect, particularly in the first aspect, the communication interval setting unit sets the communication interval to a preset first predetermined value when the determination result obtained by the meter communication unit indicates that the gas appliance is not used. The communication interval is set to an interval, and the communication interval is not changed when the gas appliance being used is discriminated as a fuel cell by the appliance discriminating section.

In a fifth aspect, particularly in the first aspect, the communication interval setting unit sets the communication interval to a preset first predetermined value when the determination result obtained by the meter communication unit indicates that the gas appliance is not used. is set to an interval, and when the gas appliance being used is discriminated as a water heater by the appliance discriminating unit, the communication interval is set to an interval shorter than the first predetermined interval after being continuously used for a predetermined time or longer. It is characterized by

In a sixth aspect, particularly in the first aspect, the communication interval setting unit sets the communication interval to a preset first predetermined value when the determination result obtained by the meter communication unit indicates that the gas appliance is not used. and when the gas appliance is in use, the communication interval is set to a second predetermined interval shorter than the first predetermined interval.

In a seventh aspect of the invention, particularly in the sixth aspect, the communication interval setting unit is configured to continuously use the gas at a first predetermined flow rate or more for a first predetermined time or more when the determination result obtained by the meter communication unit is the stove. or, if the flow rate is lower than the first predetermined flow rate and the communication is continued for a second predetermined time period longer than the first predetermined time period, the communication interval is set to an interval shorter than the second predetermined interval. It is characterized by setting

In an eighth invention, particularly in the sixth invention, when the determination result obtained by the meter communication unit is a fan heater, the communication interval setting unit changes the flow rate measured by the flow rate measurement unit by a predetermined flow rate or more. In this case, the communication interval is set shorter than the second predetermined interval only for a predetermined period.

In a ninth aspect, particularly in the sixth aspect, the communication interval setting unit sets the communication interval to be longer than the second predetermined interval when the determination result obtained by the meter communication unit is a fuel cell. It is characterized by setting

In a tenth aspect of the invention, particularly in the sixth aspect, the communication interval setting unit sets the communication interval when the determination result obtained by the meter communication unit is determined to be a water heater, and when the water heater is used continuously for a predetermined time or longer. It is characterized in that the interval is set to be shorter than the second predetermined interval.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a meter wireless device according to the present invention will be described below with reference to the accompanying drawings. In the embodiments described below, as an example of the wireless device for the meter, a wireless slave device connected to the gas meter by wire will be exemplified, and the processing thereof will be described. In the drawings, the same components are denoted by the same reference numerals, and the repetitive description of components that have already been described is omitted. In addition, this invention is not limited by embodiment described below.

(Embodiment 1)
FIG. 1 is a block diagram of a wireless slave device and a gas meter connected to the wireless slave device by wire according to Embodiment 1 of the present invention.

In FIG. 1, the gas meter 100 includes a flow path 101, a flow rate measuring section 102, a cutoff valve 103, a control section 104, an instrument discriminating section 105, and a vibration detecting section . Furthermore, the gas meter 100 is connected to the gas pipe 1, and gas appliances 10 to 12 are connected to the downstream side of the gas meter 100 via the gas pipe 2. As shown in FIG.

Further, the wireless slave device 200 includes a meter communication section 201 , a wireless communication section 202 and a communication interval setting section 203 .

The components and functions in the block are explained below.

The ultrasonic flow meter as the flow measurement unit 102 emits ultrasonic waves at regular time intervals (for example, every 0.5 seconds or 2 seconds) to the gas as the fluid flowing in the flow path 101 to measure the flow rate. and you can use common ones. In addition, it is possible to employ a configuration such as a circuit for calculating the flow rate based on thermal fluctuations, or a measurement membrane if gas is to be measured, and there is no particular limitation.

The vibration detection unit 106 is composed of a vibration sensor, an acceleration sensor, etc., and detects vibrations such as earthquakes. When vibrations exceeding a predetermined magnitude are detected, it determines that an earthquake has occurred, and outputs an earthquake occurrence signal. output, or output a vibration value corresponding to the magnitude of the vibration.

The shutoff valve 103 is composed of an electromagnetic valve, a valve using a stepping motor, or the like, and can be opened and closed according to instructions from the control unit 104, which will be described later. When the shutoff valve 103 is opened, gas is supplied to the gas appliances 10 to 12 connected after the gas meter 100, and when the shutoff valve 103 is closed, the supply is stopped.

The appliance determination unit 105 determines the type of gas appliance (water heater, water heater, fan heater, stove, etc.).

The control unit 104 is mainly composed of a microcomputer, memory, clock, storage device, etc. (none of which are shown). The control unit 104 is connected to the flow rate measurement unit 102, the cutoff valve 103, the appliance determination unit 105, the vibration detection unit 106, and the meter communication unit 201, which will be described later, via a communication interface (not shown). Based on the flow rate data measured by the flow rate measurement unit 102 , the flow rate is calculated and integrated, and the presence or absence of an abnormality is determined, and the flow path 101 is shut off by the shutoff valve 103 . Abnormalities leading to shutoff include abnormalities in which the gas flow rate exceeds a preset maximum flow rate, abnormalities in which the gas usage time exceeds a preset maximum usage time, or an earthquake detected by the vibration detection unit 106. etc.

The control unit 104 also has a function of communicating with the meter communication unit of the wireless slave device 200 based on a predetermined communication protocol.

The meter communication unit 201 communicates with the control unit 104 to receive the determination result of the appliance determination unit 105, the stored integrated value, the output result of the vibration detection unit 106, the control result and state of the shutoff valve 103, and the like. do. Alternatively, it transmits control data or the like received from the center device 400 (to be described later) to the control unit 104 .

The wireless communication unit 202 is composed of a transmission circuit, a reception circuit, a demodulation circuit, a modulation circuit, a VCO circuit, an antenna, etc. (none of which are shown), and communicates with the external base station 300 according to a predetermined protocol. Communicate, i.e. send and receive. Then, the integrated value of the gas usage obtained via the meter communication unit 201 or the detected abnormality is transmitted to the base station 300, and the control data instructed from the base station 300 is sent to the meter communication unit 201. to the gas meter 100 via. As a result, the flow path 101 can be shut off by the shutoff valve 103 of the gas meter 100 according to an instruction from the center device 400 .

The communication interval setting unit 203 controls the communication interval in the wireless communication unit 202 based on the information obtained via the meter communication unit 201, and the details will be described later.

The base station 300 communicates with the wireless communication section 202 via a communication section (not shown). Also, the base station 300 communicates with a center device 400 managed and operated by a gas company or the like through a network line or the like. Note that there is no problem even if the center device 400 also serves as the base station 300 .

With the above configuration, the gas meter 100 can communicate with the center device 400 via the wireless slave device 200 , and can communicate data such as the amount of gas usage obtained by the gas meter 100 to the center device 400 . In addition, the center device 400 can instruct the gas meter 100 to shut off the gas.

FIG. 2 shows a first example of the setting time of the communication interval setting unit 203. When the gas flow rate is less than the predetermined flow rate (21 L/H), the transmission interval is set to 300 seconds, and the predetermined flow rate abnormality is detected. is set to 20 seconds. This predetermined flow rate (21 L/H) is a flow rate at which it can be determined that the gas appliance is being used. If it is less than this flow rate, it can be determined that gas is not being used, and if it is greater than this flow rate, it can be determined that some kind of gas appliance is being used. It is a value that can be judged to be

The appliance discriminating unit 105 first determines whether a gas appliance is being used based on the flow rate obtained by the flow rate measuring unit 102. If the gas appliance is being used, the type of gas appliance is determined by a predetermined determination method. (stove, fan heater, fuel cell, water heater, etc.). If the gas appliance cannot be identified, the identification result is regarded as an unknown appliance.

The relationship between the communication interval set by the communication interval setting unit 203 and the gas appliances identified by the appliance identification unit 105 will be described below.

FIG. 3 shows the setting of the communication interval set according to the determination result in the appliance discrimination unit 105 and the changing conditions such as the flow rate and usage time. .

First, in a state where appliance discrimination is not performed in the appliance discrimination section 105, the first predetermined interval (for example, 300 seconds) is set.

Next, when the appliance determination unit 105 determines that the gas appliance is a stove, if the gas appliance is continuously used at a first predetermined flow rate (e.g., 60 L/h) or more for a first predetermined time (e.g., 30 minutes) or longer, Alternatively, if the flow rate (eg, 40 L/h) lower than the first predetermined flow rate is continuously used for a second predetermined time period (eg, 2 hours) set longer than the first predetermined time period, the communication interval is set to the first The communication interval is set to be shorter than the predetermined interval.

As a result, there is a possibility of forgetting to turn off in situations where it is used for a long time with high heat, which is not normally expected, or when it is used for longer than expected even with low heat, so please reduce the communication interval. By shortening the time, the center device 400 can quickly determine that the usage state is abnormal and contact the user, or if the user cannot be contacted, the center device 400 shuts off the gas meter 100 . can be instructed.

Further, when the appliance determination unit 105 determines that the gas appliance is a fan heater, the communication interval is set to a communication interval shorter than the first predetermined interval at the timing when the flow rate change occurs. As a result, the central device 400 can acquire flow rate information in a short period of time when a change in flow rate occurs, so that it is possible to monitor a stepwise change in flow rate, which is the unique flow rate control of the fan heater, and prevent the occurrence of an abnormality. can be grasped. It is also possible to specify the model of the fan heater.

That is, even fan heaters, which are the same device, have different flow rate control characteristics depending on the model, so the flow rate characteristics associated with the flow rate control for each model are measured and compared with the flow rate characteristics obtained in advance for each model. However, in order to specify the model with the gas meter 100, it is necessary to store the flow characteristics of each model in a memory or the like and incorporate software for specifying the model. is increased and the load on the microcomputer for control is increased. On the other hand, since the center device 400 does not have such restrictions, it can be easily realized.

In addition, it is good also as a structure which limits the time which sets communication interval to an interval shorter than a 1st predetermined interval to a predetermined period from a flow volume change.

Further, when the gas appliance is determined to be a fuel cell by the appliance discriminating unit 105, the communication interval is maintained at the first predetermined interval. This is because the change in the flow rate in the fuel cell is gradual and there is no particular need to shorten the communication interval.

Further, when the gas appliance is determined to be a water heater by the appliance determination unit 105, the communication interval is made shorter than the first predetermined interval when the gas appliance has been used for a long time (for example, 30 minutes). As a result, when it is detected that the water heater has been used for a long time, there is a possibility that the water heater has been turned off. The user can be contacted, or if the user cannot be contacted, the center device 400 can instruct the gas meter 100 to shut off.

Further, when the appliance determination unit 105 determines that the gas appliance is an unknown appliance, the communication interval is set to be shorter than the first predetermined interval. As a result, the center device 400 can acquire flow rate information and the like from the gas meter at short intervals, and can monitor for abnormal behavior.

It goes without saying that the communication interval is returned to the first predetermined interval when it is detected that the use of the gas appliance has been stopped.

As described above, according to the present embodiment, the response from the center device 400 to the gas meter can be optimized according to the gas appliance while the gas appliance is in operation, and the center device 400 can be operated. As a service provided by a gas company that provides gas appliances, even when a user who is out of the house contacts with a user who forgets to turn off a gas appliance and shuts off remotely, the shutoff can be performed quickly and safety can be ensured.

(Embodiment 2)
Next, the relationship between the communication interval set by the communication interval setting unit 203 and the gas appliance discriminated by the appliance discriminating unit 105 in the second embodiment will be described.

FIG. 4 shows the setting of the communication interval set according to the change conditions such as the appliance discrimination result and the flow rate and usage time in this embodiment. be.

First, in a state where appliance discrimination is not performed in the appliance discrimination section 105, the first predetermined interval (for example, 300 seconds) is set. After that, when the start of use of the gas appliance is detected, first, the communication interval is set to a second predetermined interval (for example, 60 seconds) shorter than the first predetermined interval. Depending on the device, the communication interval is set as described below.

Next, if the appliance determination unit 105 determines that the gas appliance is a stove, it is used continuously for a first prescribed time (eg, 30 minutes) or longer at a first prescribed flow rate (eg, 60 L/h), or , If the flow rate (eg, 40 L/h) lower than the first predetermined flow rate is continuously used for a second predetermined time period (eg, 2 hours) set longer than the first predetermined time period, the communication interval is set to the second predetermined time period. A communication interval (for example, 20 seconds) that is shorter than the interval is set.

As a result, there is a possibility of forgetting to turn off in situations where it is used for a long time with high heat, which is not normally expected, or when it is used for longer than expected even with low heat, so please reduce the communication interval. By shortening the time, the center device 400 can quickly determine that the usage state is abnormal and contact the user, or if the user cannot be contacted, the center device 400 shuts off the gas meter 100 . can be instructed.

Further, when the appliance determination unit 105 determines that the gas appliance is a fan heater, the communication interval is set to a communication interval shorter than the second predetermined interval at the timing when the flow rate change occurs. As a result, the central device 400 can acquire flow rate information in a short period of time when a change in flow rate occurs, so that it is possible to monitor a stepwise change in flow rate, which is the unique flow rate control of the fan heater, and prevent the occurrence of an abnormality. can be grasped. Further, it is also possible to specify the model of the fan heater as in the first embodiment.

Further, when the gas appliance is determined to be a fuel cell by the appliance discrimination section 105, the communication interval is set to be longer than the second predetermined interval. The change in the flow rate in the fuel cell is gentle, and there is no problem even if the communication interval is lengthened.

Further, when the gas appliance is determined to be a water heater by the appliance determination unit 105, the communication interval is further shortened from the second predetermined interval when the gas appliance has been used for a long time (for example, 30 minutes). As a result, when it is detected that the water heater has been used for a long time, there is a possibility that the water heater has been turned off. The user can be contacted, or if the user cannot be contacted, the center device 400 can instruct the gas meter 100 to shut off.

Further, when the appliance determination unit 105 determines that the gas appliance is an unknown appliance, the communication interval is set to an interval shorter than the second predetermined interval. As a result, the center device 400 can acquire flow rate information and the like from the gas meter at short intervals, and can monitor for abnormal behavior.

It goes without saying that the communication interval is returned to the first predetermined interval when it is detected that the use of the gas appliance has been stopped.

As described above, according to the present embodiment, the response from the center device 400 to the gas meter can be optimized according to the gas appliance while the gas appliance is in operation, and the center device 400 can be operated. As a service provided by a gas company that provides gas appliances, even when a user who is out of the house contacts with a user who forgets to turn off a gas appliance and shuts off remotely, the shutoff can be performed quickly and safety can be ensured.

As described above, according to the wireless slave device (wireless device for meter) of the present invention, by changing the communication interval according to the gas appliance determined by the appliance discrimination unit 105, the minimum necessary communication frequency is secured. By changing the communication interval according to the determined type of gas appliance, it is possible to save power while ensuring the necessary security performance according to the gas appliance.

The present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the gist of the present invention. For example, in the present embodiment, the determination flow rate for using a gas appliance is set to 21 L/H. However, if the gas appliance installed after the gas meter is known in advance, the minimum flow rate of that gas appliance can be set. You can also Further, although the communication time interval has been described assuming that the first predetermined interval is 300 seconds and the second predetermined interval is 60 seconds, it goes without saying that the communication time intervals can be arbitrarily set according to the battery capacity and required responsiveness.

As described above, the wireless slave unit (wireless device for meter) according to the present invention can set the communication interval according to the gas appliance, thereby saving power and ensuring necessary safety performance. It can also be applied to a water meter or the like that uses a battery as a power source.

REFERENCE SIGNS LIST 100 Gas meter 101 Flow path 102 Flow rate measuring unit 103 Shutoff valve 105 Instrument discrimination unit 200 Wireless slave device (wireless device for meter)
201 meter communication unit 202 wireless communication unit 203 communication interval setting unit 300 base station 400 center device

Claims (9)

Communicating with a gas meter having a flow rate measurement unit that measures the flow rate of gas flowing through a flow path, a device determination unit that determines a gas appliance based on the flow rate measured by the flow rate measurement unit, and a shutoff valve that shuts off the flow path, a meter communication unit that acquires at least the determination result of the appliance determination unit;
a wireless communication unit that periodically performs wireless communication with the outside;
a communication interval setting unit that sets a communication interval in the wireless communication unit;
with
The communication interval setting unit sets the communication interval to a preset first predetermined interval when the determination result obtained by the meter communication unit indicates that the gas appliance is not in use, and sets the communication interval to a first predetermined interval when the determination result is the stove. , when it is continuously used for a first predetermined time or more at a first predetermined flow rate or more, or when it is continuously used for a second predetermined time set longer than the first predetermined time at a flow rate less than the first predetermined flow rate. 1. A wireless device for a meter , wherein said communication interval is set to be shorter than said first predetermined interval. Communicating with a gas meter having a flow rate measurement unit that measures the flow rate of gas flowing through a flow path, an appliance determination unit that determines a gas appliance based on the flow rate measured by the flow rate measurement unit, and a shutoff valve that shuts off the flow path, a meter communication unit that acquires at least the determination result of the appliance determination unit;
a wireless communication unit that periodically performs wireless communication with the outside;
a communication interval setting unit that sets a communication interval in the wireless communication unit;
with
The communication interval setting unit sets the communication interval to a preset first predetermined interval when the determination result obtained by the meter communication unit indicates that the gas appliance is not in use, and sets the communication interval to a first predetermined interval when the determination result is the fan heater. A wireless device for a meter , wherein the communication interval is set to be shorter than the first predetermined interval only for a predetermined period when the flow rate measured by the flow rate measuring unit changes by a predetermined flow rate or more. Communicating with a gas meter having a flow rate measurement unit that measures the flow rate of gas flowing through a flow path, a device determination unit that determines a gas appliance based on the flow rate measured by the flow rate measurement unit, and a shutoff valve that shuts off the flow path, a meter communication unit that acquires at least the determination result of the appliance determination unit;
a wireless communication unit that periodically performs wireless communication with the outside;
a communication interval setting unit that sets a communication interval in the wireless communication unit;
with
The communication interval setting unit sets the communication interval to a preset first predetermined interval when the determination result obtained by the meter communication unit indicates that the gas appliance is not used, and the gas appliance is used by the appliance discrimination unit. A wireless device for a meter , wherein the communication interval is not changed when the gas appliance is determined to be a fuel cell. Communicating with a gas meter having a flow rate measurement unit that measures the flow rate of gas flowing through a flow path, an appliance determination unit that determines a gas appliance based on the flow rate measured by the flow rate measurement unit, and a shutoff valve that shuts off the flow path, a meter communication unit that acquires at least the determination result of the appliance determination unit;
a wireless communication unit that periodically performs wireless communication with the outside;
a communication interval setting unit that sets a communication interval in the wireless communication unit;
with
The communication interval setting unit sets the communication interval to a preset first predetermined interval when the determination result obtained by the meter communication unit indicates that the gas appliance is not used, and the gas appliance is used by the appliance discrimination unit. A wireless device for a meter , wherein when the gas appliance is determined to be a water heater, the communication interval is set to be shorter than the first predetermined interval after the gas appliance has been used continuously for a predetermined time or longer. Communicating with a gas meter having a flow rate measurement unit that measures the flow rate of gas flowing through a flow path, a device determination unit that determines a gas appliance based on the flow rate measured by the flow rate measurement unit, and a shutoff valve that shuts off the flow path, a meter communication unit that acquires at least the determination result of the appliance determination unit;
a wireless communication unit that periodically performs wireless communication with the outside;
a communication interval setting unit that sets a communication interval in the wireless communication unit;
with
The communication interval setting unit sets the communication interval to a preset first predetermined interval when the determination result obtained by the meter communication unit indicates that the gas appliance is not used, and sets the communication interval to a first predetermined interval when the gas appliance is used. A wireless device for a meter , wherein the communication interval is set to a second predetermined interval shorter than the first predetermined interval. When the determination result obtained by the meter communication unit is the stove, the communication interval setting unit determines whether the gas is continuously used for a first predetermined time or more at a first predetermined flow rate or more, or the flow rate is less than the first predetermined flow rate. 6. The communication interval is set to an interval shorter than the second predetermined interval when the device is continuously used for a second predetermined time longer than the first predetermined time. Wireless device for meters. When the determination result obtained by the meter communication unit is a fan heater, the communication interval setting unit sets the communication interval to the second communication interval for a predetermined period when the flow rate measured by the flow rate measurement unit changes by a predetermined flow rate or more. 6. The meter wireless device according to claim 5 , wherein the interval is set to be shorter than the predetermined interval. 6. The communication interval setting unit according to claim 5 , wherein when the determination result obtained by the meter communication unit is a fuel cell, the communication interval setting unit sets the communication interval to an interval longer than the second predetermined interval. Wireless device for meters. The communication interval setting unit sets the communication interval to an interval shorter than the second predetermined interval when the determination result obtained by the meter communication unit is determined to be a water heater and the water heater is continuously used for a predetermined time or more. 6. The meter wireless device according to claim 5 , wherein:

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