JP2008197049A - Flow rate measuring device and its program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To correctly register determination information (registration data) to be used for determining a gas appliance installed at a downstream of a flow rate measuring device even when its flame has gone out at the time of registering the determination information. <P>SOLUTION: The flow rate measuring device includes: a flow rate measuring means 3 measuring a gas flow rate at a specific time interval; an appliance information storage means 6; a first arithmetic means calculating a differential value between a flow rate value output from the flow rate measuring means 3 and that before a prescribed time for each measurement time; a registration means 10 registering, as registration data, the flow rate value or the differential value when the gas appliance connected to the downstream of the flow rate measuring means 3 is operated alone to an appliance information storage means 3 and stopping the registration of the registration data when failure in ignition of the gas appliance is detected during detection of the registration data; a notification part 11 issuing the notification when the registration means 10 has finished the registration to the appliance information storage means 3 or when the ignition of the gas appliance has failed; and an appliance determination part 8 determining an operation of the gas appliance on the basis of the information of the appliance information storage means 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is installed at the entrance of a gas supply pipe in each home, and is used to provide a new fee and service according to the usage equipment such as a separate fee for gas equipment, etc. in a gas meter for measuring the gas flow rate. The present invention relates to a technology for discriminating and detecting a gas appliance inside.

  Conventionally, as shown in FIG. 8, this type of flow rate measuring device 1 includes a flow rate measuring means 3 for measuring the flow rate of gas flowing in the flow path of the flow rate measuring device, and a series generated with combustion of each gas appliance. Stored in the registered instrument flow rate pattern table 4, the pattern extraction means 5 for extracting the flow rate pattern of the currently operating gas instrument from the flow rate measured by the flow rate measuring means 3, and the registered instrument flow rate pattern table 4. A flow rate pattern of the gas appliance being operated and a flow rate pattern of the gas appliance currently in operation extracted by the pattern extraction means 5 to identify the gas appliance currently in operation, and a registered appliance flow rate pattern When the gas appliance not registered in the table 4 operates and the appliance discriminating means 9 cannot discriminate the operating gas appliance, the data extracted by the pattern extracting means 5 (preferably Details, is composed of a pattern registration means 10 for registering an average value of the flow rate pattern) in a plurality of times in the registration instrument flow pattern table 4.

  When the registration means 10 detects an unregistered flow rate pattern, if the gas appliance is a gas appliance that operates frequently, the registration means 10 uses a communication line to indicate a flow pattern that is considered to be a new gas appliance and the name of the gas appliance. The system receives data from a remote center and registers it in the registered instrument flow rate pattern table 4.

  As a result, since the flow measuring device 1 is normally used for about 10 years, there is a high possibility that a new gas appliance will be sold even after the flow measuring device 1 is installed. It can also handle discrimination.

In other words, when a new gas appliance is released after the flow measurement device is installed, the gas appliance is operated several times separately, and the flow pattern of the gas appliance is obtained from a remote center and used for subsequent discrimination. It is what I tried.
JP 2003-148728 A

  However, the conventional configuration has the following problems. When operating the gas appliance to extract the flow pattern, for example, if the gas appliance was a gas table, the battery was exhausted to generate a spark for ignition, or the gas appliance and the gas piping were connected. Immediately after that, there are many cases where air is contained in the gas flow path.

  In this case, the flow rate pattern is an insufficient flow rate pattern as compared with a normally ignited one. Therefore, if you register this pattern, or if you register the average value calculated based on this pattern, you can not determine the gas appliance that has now worked with the flow pattern that worked normally, so you make an incorrect decision, The flow pattern of new gas appliances is registered twice.

  When registering twice, it is necessary to secure a storage area for storing useless data and for the registrant to delete the flow rate pattern related to misfire from the appliance information storage means, which is complicated for the registrant. It will increase.

  The present invention solves the above-described conventional problems, and when a flow rate measuring device registers discrimination data necessary for discrimination of a new gas appliance, if the gas appliance misfires for some reason, a flow rate pattern related to misfire It is an object of the present invention to make it possible for the appliance discriminating means to discriminate using a flow rate pattern (hereinafter referred to as registered data) only when operating normally except for.

  In order to solve the above-mentioned conventional problems, a flow rate measuring device according to the present invention includes a flow rate measuring means for measuring a flow rate of a gas flowing through a measurement channel at a predetermined time interval, and a gas connected downstream of the measurement channel. Appliance information storage means for storing appliance registration data; and first calculation means for calculating a difference value between a flow rate value output from the flow rate measurement means and a flow rate value before a predetermined time for each measurement time interval; The flow rate value when the gas appliance is operated by only one unit or the difference value is registered in the appliance information storage means as registration data, and the ignition failure of the gas appliance is detected during detection of the registration data. A registration unit for canceling registration of the registration data when detected, a notification unit for reporting when the registration unit completes registration in the instrument information storage unit or when ignition of the gas appliance fails, It is obtained by a and a appliance determination unit that determines the operation of the gas appliance based on the information of the serial device information storage unit.

  Thus, the gas appliance is, for example, a gas table in a house (mainly kitchen). The gas table has an ignition method such as a rotary type or a push type, but may be misfired (extinguishes) immediately even if it is ignited once depending on the user's operation. In this case, the safety device disappears and the gas supply to the gas table combustion section is shut off. Then, the gas flow rate measured by the flow rate measurement unit is significantly different from that in the case where misfire does not occur originally, and registration data cannot be registered accurately.

  Therefore, when a gas appliance misfires during registration of registration data, the registration operation itself is stopped, thereby preventing erroneous determination of an appliance operating with incorrect registration data. That is, the appliance discriminating unit can perform discrimination with high accuracy.

  The flow rate measuring device and the program thereof according to the present invention include a gas appliance connected to the downstream side of the flow rate measuring device when the gas appliance is likely to misfire immediately after ignition, such as a gas table, and the gas appliance. Even if a misfire occurs immediately after ignition when registering the registered data, the registered data (flow rate measured by the flow measurement means, the flow pattern, and the time characteristics of the flow pattern) are used only. It is to be able to distinguish the gas appliance that is. In other words, the appliance discriminating unit can perform discrimination with high accuracy.

  According to a first aspect of the present invention, there is provided a flow rate measuring means for measuring a flow rate of a gas flowing through a measurement flow path at a predetermined time interval, and an instrument information storage means for storing registration data of a gas instrument connected downstream of the measurement flow path. The first calculation means for calculating the difference value between the flow rate value output from the flow rate measurement means and the flow rate value for a predetermined time for each measurement time interval, and the gas appliance is operated by only one unit. The flow rate value or the difference value at the time is registered in the appliance information storage means as registration data, and if the ignition failure of the gas appliance is detected during detection of the registration data, registration of the registration data is canceled Based on the information in the appliance information storage means, a notification section that notifies when the registration is completed in the appliance information storage means or when the ignition of the gas appliance has failed. By providing a appliance determination unit that determines the operation of the instrument, to obtain the following effects.

The gas appliance is, for example, a gas table in a house (kitchen or the like). The gas table has an ignition method such as a rotary type or a push type, but may be misfired (extinguishes) immediately even if it is ignited once depending on the user's operation. In this case, the safety device disappears and the gas supply to the gas table combustion section is shut off. Then, the gas flow rate measured by the flow rate measurement unit is significantly different from that in the case where misfire does not occur originally, and registration data cannot be registered accurately.

  Therefore, when a gas appliance misfires during registration of registration data, the registration operation itself is stopped, thereby preventing erroneous determination of an appliance operating with incorrect registration data. That is, the appliance discriminating unit can perform discrimination with high accuracy.

  In particular, according to the second aspect of the invention, the flow rate measuring device according to the first aspect of the invention is characterized in that the flow rate Qa a predetermined time before the time a when the difference value is larger than a predetermined positive threshold and the time difference a Second calculating means for calculating a flow rate difference (Qb−Qa) from the flow rate Qb at the time b when the absolute value is smaller than the positive threshold, and the registered data includes the flow rate Qb at the time b, or The following effects are obtained by the flow rate difference (Qb−Qa).

  That is, when the gas appliance starts operation, the difference value changes. Further, the flow rate measured by the flow rate measuring device is slightly in the range of 1 [L / h] to 2 [L / h] due to the inertial law depending on the flow rate that was flowing before the gas appliance is not operating. ) Or a slight (1 [L / h] to 2 [L / h]) flow of gas pressure due to temperature difference between the outdoor where the gas cylinder is installed and the indoor where the gas appliance is installed Therefore, it does not become 0.

  Therefore, it is not necessary to consider the influence of the flow rate that is slightly flowing even though the gas appliance is stopped, by judging whether the flow rate change due to the appliance operation exceeds a predetermined positive threshold or not. Also gets better.

  In the third aspect of the invention, in particular, when the flow rate Qb at the time b or the flow rate difference (Qb-Qa) is smaller than a predetermined flow rate, the registration means of the second aspect of the invention determines that ignition has failed and By canceling registration of registration data, the following effects are obtained.

  This is because the gas does not flow when the ignition fails, so that it is erroneous registration data by determining that the flow rate measured by the flow rate measuring unit is not more than the predetermined flow rate (for example, 5 [L / h]) as the ignition failure. Prevent misjudgment of working instruments. That is, the appliance discriminating unit can perform discrimination with high accuracy.

  According to a fourth aspect of the invention, in particular, the registration means of the second aspect of the invention is such that the flow rate measured by the flow rate measurement means when the elapsed time from the time a is greater than a predetermined time is smaller than the predetermined flow Determines the ignition failure and cancels the registration of the registration data, thereby obtaining the following effects.

  For some gas appliances, the absolute value of the difference value, for example, does not fall below the positive threshold value until about 1 minute has elapsed. In addition, it does not fall below the predetermined flow rate (for example, 5 [L / h]) after ignition in the gas appliance. For this reason, the registration unit determines that the ignition flow has failed because the flow rate measured by the flow rate measurement unit when the predetermined time has elapsed after ignition is equal to or less than the predetermined flow rate (for example, 5 [L / h]). Prevent misjudgment of appliances operating on registered data. That is, the appliance discriminating unit can perform discrimination with high accuracy.

According to a fifth aspect of the invention, in particular, when the second calculation means of the third or fourth aspect of the invention is such that the difference value becomes larger than a predetermined positive threshold again by a predetermined time after confirming misfire. Calculates the flow rate difference between the flow rate Qc before the time c from the time c and the flow rate Qd at the time d when the absolute value of the difference value becomes smaller than the positive threshold after the time c. The following effects are obtained by registering the flow rate difference (Qd−Qc) as registration data in the appliance information storage means.

  When registering registration data, there are many cases where a misfire occurs once and the registrant operates again to ignite the gas appliance. Rather than notifying each time a misfire occurs, storing the flow rate change excluding the flow rate change related to that part by detecting that the registration unit has misfired as gas appliance registration data in the appliance information storage unit Prevents erroneous determination of gas appliances operating with incorrect registration data. That is, the appliance discriminating unit can perform discrimination with high accuracy.

  Furthermore, even if a normal misfire occurs, if the registrant operates the gas appliance again and succeeds in ignition, the registrant can store the registration data of only the successful part in the appliance information storage means. Since it is no longer necessary to confirm the presence or absence of failure in the flow measurement device outside the home away from the gas appliance, the complexity of the registrant can be reduced. If the registration data registration is canceled due to misfire, the registrant will go from the side of the gas appliance to the installation location of the flow measurement device outside the house, confirm that it has been stopped, perform another operation, and register again. Work to enable registration of data is required. As described above, since it is not necessary to confirm that the cancellation has occurred and prepare for re-registration, the complexity of the registrant can be reduced.

  According to a sixth aspect of the present invention, the flow rate measuring means of the flow rate measuring apparatus according to any one of claims 1 to 5 is an instrument at the moment when the flow rate changes due to the configuration using the ultrasonic flowmeter as the instantaneous flow rate measuring means. The discrimination operation and the learning operation can be activated, and the appliance discrimination accuracy can be improved by capturing the flow rate change finely.

  According to a sixth aspect of the present invention, a program for causing a computer to execute at least a part of the flow rate measuring device according to any one of claims 1 to 6 can be easily realized by a personal computer or the like. The use of a recording medium on which the software is recorded makes it easy to install software at the home of each user.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
In FIG. 1, reference numeral 1 denotes a flow rate measuring device, which is provided in the middle of a gas supply pipe, and one or more gas appliances installed in each customer's house are connected to the downstream pipe. The inside of the flow rate measuring device is a gas shutoff valve 1a which is a shutoff means provided in a gas flow path connected to a gas pipe, a flow rate measuring means 3, a display unit 1b for displaying a used gas flow rate, an earthquake, etc. A seismic device 1c for detecting vibration, an appliance information storage means 6 for performing appliance discrimination relating to the present invention, a first calculation means 7, a second calculation means 8, an appliance discrimination means 9, and registration A means 10, an informing means 11, a control circuit 12 for controlling the operation of the seismic device 1c, an instrument discrimination function, and a safety function, and a battery (not shown) serving as a power source thereof are incorporated.

Here, the operation of the flow rate measuring means 3 will be described with reference to FIG. In FIG. 2, the measurement channel 13 has a rectangular cross section, and a pair of ultrasonic transmitters and receivers 14, 15 are sandwiched between the measurement channel 13 and a wall surface perpendicular to the gas flow direction of the measurement channel 13. The upstream side and the downstream side of the flow path are mounted to face each other at an angle φ. Ultrasonic waves are alternately transmitted and received between the ultrasonic transmitters / receivers 14 and 15, and the difference between the propagation times of the ultrasonic waves in the forward direction and the reverse direction with respect to the flow of the fluid is measured at regular intervals, and output as a propagation time difference signal. Have a job. In response to this propagation time difference signal, the calculation means (not shown) calculates the flow velocity and flow rate of the fluid to be measured.

  The calculation formula is shown below.

In FIG. 2, L is a measurement distance, where t1 is the transmission time from the upstream, t2 is the transmission time from the downstream, and C is the speed of sound, the flow velocity V at time T of the measurement point is expressed by the equation (1) V = (L / 2cosφ) ((1 / t1)-(1 / t2))
It is. Furthermore, since the gas flowing in the measurement flow path 13 suddenly changes depending on the point at which the flow velocity is measured, the flow velocity may be larger or smaller than the flow velocity seen from the entire flow path. An average of the measured flow velocity V ′ is used as a measured flow rate (hereinafter referred to as a flow rate) measured by the flow rate measuring means 3. In addition, regarding the flow rate measuring means 3 of the present invention, an ultrasonic type measuring means is used, but as a measuring method, other flow rate measuring methods can be continuously measured in a constant cycle in a short time such as a full dick method. Can be used.

  Although the measurement time interval in this embodiment can be set within a range in which ultrasonic waves can be transmitted and received, in the present invention, measurement is performed at intervals of 2 seconds. Furthermore, it is possible to reduce the time interval in terms of the measurement principle. Depending on the gas instrument, there are instruments that start up in less than 2 seconds, so reducing the measurement time interval is advantageous in terms of instantaneous instrument discrimination. However, if the measurement interval is shortened, there is a problem that the battery consumption increases, and the measurement interval equivalent to the membrane type used in the conventional gas meter is a second digit order interval. Therefore, it becomes difficult to make a judgment by looking at the difference in flow rate change of the algorithm of the present invention, and in the present invention, it is performed by measuring at intervals of 2 seconds as a well-balanced time from the viewpoint of cost and instrument discrimination performance.

  The appliance information storage means 6 is a semiconductor memory that stores the maximum flow rate when the gas appliance is operated and the minimum flow rate when the gas appliance is operated as discriminating values for each gas appliance as shown in FIG. is there. This discrimination value is registered by the registration means 10. The method for registering the discriminant value by the registration means 10 is registered by actually operating the gas appliance and collecting numerical values.

  Here, the maximum flow rate is equal to the amount of gas consumed by the fan heater when the switch is turned on to operate the fan heater. If it is a gas stove, it is equal to the amount of gas used when operating in the fully open setting. In the case of a gas table (a gas table for push-type ignition), it is equal to the amount of gas used when ignition is performed and the heating power adjustment lever is not moved. A magnetic storage medium or the like may be used as long as recording can be added or rewritten.

  The appliance discriminating means 9 monitors the difference value calculated by the first computing means 7, and when necessary, the flow rate difference calculated by the second computing means 8 and the judgment value stored in the appliance information storage means 6. Is a processing unit that discriminates appliances that have started operation. In addition, for the determined gas appliance, the amount of gas used for each gas appliance operating every 2 seconds is calculated. Furthermore, even when the instrument in operation stops, the difference value calculated by the first calculation means 7 is monitored, and the flow rate difference calculated by the second calculation means 8 and the gas usage for each gas instrument when necessary. The gas appliance which stopped compared with the quantity is specified. Moreover, it is a processing unit that manages the flow rate used by the operating gas appliance.

FIG. 3 is a time change of the gas flow rate used by the gas table (flowing to the measurement flow path 13) when misfire occurs immediately after ignition, which is an operation failure at the start of use of the instrument. As shown in the figure, the gas is ignited by the user's operation at time T01 and gas flows into the measurement flow path until time T04. As a result, the flow rate measured by the flow rate measuring means 3 becomes zero. The reason why the flow rate measuring device 3 measures the gas flow rate at T05 is that it takes an average of 2 seconds ago.

  Based on the above, the operation of the flow rate measuring device in the present embodiment will be described using the flowchart of FIG. First, the registrant changes the mode of operation so that the flow measurement device can register the discrimination information (shift to the registration mode) (S401). In this embodiment, the operation when the flow measurement device is not in the registration mode will not be described in detail. However, when the flow measurement device is not in the registration mode, the flow rate of the gas flowing downstream from the flow measurement device is simply measured. If necessary, the used gas appliance is discriminated (S402). In the present embodiment, this process is called normal measurement.

  Switching from the normal mode to the registration mode is performed when the registrant switches the switch using a switch or the like that is an input unit (not shown). Also, it is possible to switch by requesting the registrant to perform a special switch operation or requesting the use of a special tool so that anyone other than the registrant cannot easily shift from the normal mode to the registration mode. It is desirable to be a thing.

  Thereafter, if the registrant returns to the house and operates the gas table from time T01, the flow rate measured by the flow rate measuring means 3 at time T01 is 40 [L / h] (S403), and the first calculating means 7 Since the difference value to be calculated is 40 [L / h] and is larger than 3 [L / h] (S404), since the registration has not been confirmed so far (S405), the difference value is 3 [L / h] for the first time thereafter. It is determined that the gas appliance that has caused the flow rate change at the following time is determined. Further, since the difference value is positive (S406), it is determined to register the discrimination information of the gas appliance that has started the operation (S407).

  In the present embodiment, the difference value calculated by the first calculation means is a difference value 4 seconds before the current time. The reason why the time interval of the difference calculated by the first calculation means 7 is 4 seconds is because the following is taken into consideration. In FIG. 4, it is assumed that the change in the gas flow rate changes in accordance with the measurement timing of the flow rate measuring means 3, but that is not the case. That is, the gas appliance starts and stops regardless of the measurement timing. FIG. 5 is a diagram illustrating the flow rate measured by the flow rate measurement unit 3 when the timing measured by the flow rate measurement unit 3 and the timing at which the flow rate changes due to the operation of the instrument are different. The gas table in this figure is assumed to continue burning gas with a stable flow rate by time T05 'without misfire immediately after the gas table.

  Then, the flow rate calculated by the second calculation means 8 when the time interval of the difference value is 2 seconds is regarded as a flow rate change changed from time T00 ′ to time T07 ′. / H] and the change in the flow rate of the instrument cannot be accurately captured. Furthermore, since the flow rate measured by the flow rate measuring means 3 is the average of the current time and the flow velocity two seconds ago, the current flow rate is affected by the flow rate two seconds ago. Therefore, the flow rate 4 seconds before that is not affected at all is taken as a reference for the difference value.

  Further, when the difference value calculated by the first calculating means 7 is negative, it cannot be considered that the instrument has been operated. Therefore, the notifying means 11 displays to notify the registrant that registration is impossible (S408). The measurement apparatus goes out of the registration mode (S409) and performs normal measurement.

Next, from time T02 to T04, the flow rate measuring means 3 measures to start the operation of the gas table (S403). The flow rate gradually increases and the difference value is 3 [L / h] or more (S404). Since the determination information is also registered (S405), the next measurement (after 2 seconds) is awaited. Also from time T05 to T07, the flow rate measuring means 3 measures (S403) the flow rates are 80 [L / h] and 0 [L / h], and the difference value calculated by the first calculating means 7 becomes negative. However, if the absolute value is 3 [L / h] or more (S404) and it is already confirmed that the discrimination information is registered (S405), the next measurement (after 2 seconds) is awaited.

  At time T08, the flow rate measuring means 3 measures (S403) the flow rate is the same as the flow rate at time T07 (0 [L / h]), and the absolute value of the difference value calculated by the first computing means 7 Is 0 [L / h] and lower than 3 [L / h] (S404). Here, since it is determined that the discrimination information is registered at time T01 (S410), it is determined that the second calculation means 8 discriminates the flow rate (130 [L / h]) at the current time T07. The flow rate difference (0 [L / h]) with the flow rate (0 [L / h]) at time T0 4 seconds before the calculated time T01 is calculated (S411), and the magnitude of this flow rate difference is a predetermined value. If there is no more (for example, 20 [L / h]) (S412), the notification means notifies that the gas appliance to be registered has misfired (the extinguishing safety device has been activated) (S415) and registration. Exit from the mode (S409) and perform normal measurement.

  By this, when trying to register the registration data of the gas appliance, for example, even if the gas appliance is a gas table, even if it disappears, it is possible to prevent the wrong registration value from being written in the information storage means 6 Can do. If incorrect information is written in the information storage means 6, it is necessary to incorporate a mechanism for erasing the information into the flow rate measuring device 1, so that input means and programs necessary for erasing must be separately developed. Disappear. Furthermore, since it is necessary to separately perform the work of deleting the registration data written by the registrant by mistake, this increases the complexity for the registrant, but the registrant does not need to perform the work. Can be reduced.

  Even if the difference value calculated by the first calculation means 7 becomes a negative value, if the registration is confirmed, it is handled in the same way as when it is positive depending on the gas appliance. This is because there are instruments that consume more gas than sometimes. The time change of the gas flow rate consumed by the gas appliance at this time shows a time characteristic with an overshoot as shown in FIG. If the flow rate difference can be calculated accurately without the gas table disappearing, the flow rate difference is written in the instrument information storage means 6 (S413).

  And the alerting | reporting means 11 controls a gas cutoff valve, and interrupts | blocks the gas supply to the gas appliance connected downstream of itself (S414). Then, if the gas appliance is a gas table, since the flame has disappeared from the state where the flame has been emitted and burned up to now, the registrant can visually recognize that the discrimination information has been registered. Also, if the gas appliance is a water heater, it is difficult for the registrant to directly check the flame, but the registrant can notify the misfire that the water heater itself has in advance. It can be seen that the discrimination information is registered with the audio data reproduced from the water heater. When the registration is completed, the flow measuring device goes out of the registration mode (S409) and performs normal measurement.

  In addition, in the present embodiment, the flow rate difference calculated by the second calculation means 8 when one gas appliance is operated is registered, but the difference value exceeds 3 [L / h] which is a threshold value. The maximum value of the difference value from the time until the value becomes 3 [L / h] or less again may be registered.

  Further, if the difference value does not become 3 [L / h] or less even after 30 seconds have elapsed after the difference value exceeds 3 [L / h] which is the threshold value, the gas flow rate that is always consumed is It may be determined that a misfire has occurred even when the flow rate measured by the flow rate measurement means 3 after 30 seconds is not greater than or equal to a predetermined value (20 [L / h]), recognizing that the device changes.

In consideration of the case where the flow rate measuring device is erroneously operated and the flow rate measuring device shifts to the registration mode, the difference value calculated by the first calculating means 7 for example for one minute after entering this mode is the threshold value. If it does not exceed the threshold, normal measurement is performed even if the discrimination information is not stored in the appliance information storage means 6.

  In the present embodiment, the registration completion is notified by shutting off the gas in this embodiment, but the flow measurement device stores voice data and the like, and the registration completion is notified by reproducing the data. It may be.

(Embodiment 2)
The present embodiment has the same configuration as that of the first embodiment, and notifies the registrant when the flow rate difference calculated by the second calculation means is less than a predetermined value (for example, 20 [L / h]). Instead, the registration mode is continued. FIG. 7 is a flowchart showing the operation of the flow rate measuring device 1 in the present embodiment. Since most of FIG. 7 is the same as the flowchart of Embodiment 1, only different parts will be described.

  When the flow rate difference calculated by the second calculating means is less than a predetermined value (for example, 20 [L / h]) (S411), the flow rate measuring device 1 according to the present embodiment “notifies registration failure”. Instead of “leaving the registration mode”, the registration that has been confirmed in S407 is set to the unconfirmed initial state again (S415 ′) and waits for two seconds (next measurement). As a result, misfire can be confirmed if the registrant visually confirms, so that if the registrant misfires, if the registrant operates the appliance again and reignites, the necessary registration data can be registered in the appliance information storage means 6. . Therefore, even if the gas appliance is misfired, registration data can be registered if it is reignited in the house, so that if the registration fails, the flow rate measuring device 1 is again switched to the registration mode (flow rate measurement). It is possible to eliminate the necessity of going back and forth between the outside of the house (with the apparatus 1) and the inside of the house (with the gas appliance), and the complexity of the registrant can be reduced.

  After detecting misfire, even if the registration confirmed in S407 is again unestablished in the initial state (S415 ′) and waits for two seconds (next measurement), the first calculation means, for example, for 1 minute. When the difference value calculated by 7 does not exceed the threshold value, normal measurement is performed even if the discrimination information is not stored in the appliance information storage unit 6.

  The means described above are implemented in the form of a program for cooperating hardware resources such as a CPU (or microcomputer), RAM, ROM, storage / recording device, electrical / information device equipped with I / O, computer, server, etc. May be. In the form of a program, new functions can be distributed / updated and installed easily by recording them on a recording medium such as magnetic media or optical media or distributing them using a communication line such as the Internet.

  As described above, the flow rate measuring device and the program according to the present invention can accurately calculate the amount of gas used (flow rate) at each time by the gas appliance connected downstream of the gas meter. It can also be applied to security and other uses for monitoring proper use.

Configuration diagram of a flow rate measuring device according to Embodiment 1 of the present invention Flow rate measurement unit configuration diagram in Embodiment 1 of the present invention Usage flow characteristic diagram when operating the instrument in Embodiment 1 of the present invention The flowchart explaining operation | movement of the flow volume measuring apparatus in Embodiment 1 of this invention. The characteristic view which shows the flow volume change which a flow measurement means measures when the timing which the flow measurement means in Embodiment 1 of this invention measures differs from the timing which an instrument operate | moves and a flow volume change generate | occur | produces The characteristic view which shows the flow volume change of the instrument with an overshoot phenomenon at the time of starting in Embodiment 1 of this invention The flowchart which shows operation | movement of the flow measuring device in Embodiment 2 of this invention. Configuration diagram of a conventional flow measurement device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flow measuring device 3 Flow measuring means 6 Instrument information storage means 7 1st calculating means 8 2nd calculating means 9 Appliance discriminating means 10 Registration means 11 Notification means

Claims (7)

From the flow rate measurement means for measuring the flow rate of the gas flowing through the measurement flow path at predetermined time intervals, the instrument information storage means for storing the registration data of the gas apparatus connected downstream of the measurement flow path, and the flow rate measurement means A first calculation means for calculating a difference value between the output flow rate value and a flow rate value before a predetermined time for each measurement time interval; and the flow rate value when operating only one gas appliance, or Registering the difference value as registration data in the appliance information storage means, and registration means for canceling registration of the registration data when an ignition failure of the gas appliance is detected during detection of the registration data; A registration unit performs an operation of the gas appliance based on information of the appliance information storage unit and a notification unit that notifies when the registration to the appliance information storage unit is completed or when ignition of the gas appliance fails. Flowmeter side device and a separate to appliance determination unit. The flow rate measuring device has a flow rate Qa that is a predetermined time before the time a when the difference value is larger than a predetermined positive threshold, and a time b when the absolute value of the difference value is smaller than the positive threshold after the time a. 2. A second calculation means for calculating a flow rate difference (Qb−Qa) with respect to the flow rate Qb of the second time, and the registered data is the flow rate Qb at the time b or the flow rate difference (Qb−Qa). The flow rate measuring device described in 1. The flow rate measuring apparatus according to claim 2, wherein the registration unit determines that the ignition has failed and stops registration of the registration data when the flow rate Qb at time b or the flow rate difference (Qb-Qa) is smaller than the predetermined flow rate. The registration unit determines that the ignition has failed and cancels registration of registration data when the flow rate measured by the flow rate measurement unit when the elapsed time from time a is greater than the predetermined time is smaller than the predetermined flow rate. 2. The flow rate measuring device according to 2. When the difference value becomes larger than a predetermined positive threshold again by a predetermined time after confirming the misfire, the second calculation means, after the time c, the flow rate Qc a predetermined time before the time c, The flow rate difference with the flow rate Qd at the time d when the absolute value of the difference value is smaller than the positive threshold is calculated, and the registration unit registers the flow rate difference (Qd−Qc) in the appliance information storage unit as registration data. Item 5. A flow rate measuring device according to item 3 or 4. The flow rate measuring device according to claim 1, wherein the flow rate measuring unit uses an ultrasonic flowmeter as the flow rate measuring unit. The program which makes a computer perform at least one part of the flow measuring device of any one of Claim 1 to 6.

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