JP4306618B2 - Instrument discrimination device - Google Patents

Description

The present invention uses a vibrator or the like, and connects to a flow velocity or flow rate measuring device that measures the flow rate of gas or liquid using ultrasonic waves, and discriminates a used instrument connected to the flow path. The present invention relates to an appliance discriminating apparatus that

  As a conventional discriminating device, there is one built in a gas meter, and an instrument is estimated by performing various calculations (for example, see Patent Document 1).

  FIG. 8 is a block diagram showing a configuration of a general gas pipe. In FIG. 8, 1 is a gas appliance discriminating device, 2 is a gas meter, 3 is a gas pipe, and 4 is a gas appliance. A block diagram of the gas appliance discriminating apparatus is shown in FIG.

  In FIG. 9, 5 is a flow rate measuring device that generates a signal according to the amount of gas passing through the gas meter, and 6 is a flow rate signal sent from the flow rate measuring device to calculate the change flow rate of the gas meter passing gas amount. Individual gas appliance flow rate calculation means 8 for separating into gas amounts, 8 is a sensor means for obtaining an input signal other than the change flow rate. For example, it comprises five types of detection means 81, 82, 83, 84 and 85. Reference numeral 81 denotes an air temperature detecting means which is attached to the main body of the gas meter and constantly detects the current outside air temperature. 82 is a calendar detection means equipped with a time measuring mechanism that can always obtain current season information. 83, 84, 85 are also connected to the individual gas appliance flow rate calculation means 6.

  Reference numeral 83 denotes a use start time detecting means having a mechanism for measuring and storing time information when each gas appliance starts to be used. Reference numeral 84 denotes maximum flow rate duration detection means for measuring the duration of the maximum gas flow rate of each gas appliance, and measures and stores the time during which the maximum gas amount is used (peak hold). 85 is a flow rate change recognizing means for sampling the time change of the flow rate pattern at the time of ignition or combustion for each individual gas appliance, and captures the transient phenomenon of the flow rate consumption pattern unique to each appliance. Reference numeral 9 denotes composite calculation means for discriminating the gas appliance used by combining the information obtained from the individual gas appliance flow rate calculation means 6 and the sensor means 8. This gas appliance discriminating device is built in the gas meter 2 and connected to each gas appliance 4 only through the gas pipe 3.

With this configuration, the composite calculation means 9 is information obtained from the individual gas appliance flow rate calculation means 6, the temperature detection means 81, the calendar detection means 82, the use start time detection means 83, the maximum flow rate duration detection means 84, and the flow rate change recognition means 85. Fuzzy reasoning is adopted to discriminate the types of gas appliances by combining them. Then, a membership function used in the antecedent part is created based on information obtained from each detecting means, and a membership function used in the consequent part is also created. A tool is discriminated by assembling a plurality of rules inferred based on these functions. For example, if the result of the calculation does not make it look like a heater or if it looks like a cooker, it can be said that the corresponding gas appliance can be regarded as a heater or a cooker. Detailed explanation of how to assemble membership functions and rules is omitted.
JP-A-3-236513 (Page 2, Fig. 1)

  However, the conventional gas appliance discriminating apparatus requires a plurality of sensors, and more complicated inference calculation needs to be performed inside the meter. In addition, even complex calculations can be used for inference. In addition, since the power supply capacity is limited inside the meter, large-scale and long-time calculations are difficult.

  The present invention solves the above-mentioned problems, and communicates flow rate data from the fluid measuring device to the outside, and performs calculation in a place where there is no problem with the power capacity, thereby improving the accuracy of instrument discrimination and moving to normal flow rate measurement. The purpose is to reduce the load.

In order to solve the above-described conventional problems, the instrument discriminating apparatus of the present invention includes a fluid measurement unit that measures a flow velocity or a flow rate arranged in a flow path through which a fluid to be measured flows, and a flow velocity value or a flow rate value by the fluid measurement unit changes. Flow rate data or flow rate data transmitted from the first communication unit of a flow rate or flow rate measuring device comprising: a first communication unit that transmits the flow rate data or flow rate data measured by the fluid measuring unit only to the outside. The second communication means for receiving the device, and the instrument determining means for determining the instrument used based on the flow velocity data or the flow rate data received by the second communication means, the first communication means The flow velocity data or flow rate data to be transmitted includes a change in flow velocity or flow rate at the time of rising, and the appliance discriminating means starts the operation of the first communication means. It is characterized in that discriminates motion to the instrument.

The instrument discriminating apparatus of the present invention is a fluid measuring means for measuring a flow velocity or a flow rate arranged in a flow path through which the fluid to be measured flows, and is measured by the fluid measuring means only when the flow velocity value or the flow rate value by the fluid measuring means changes. Second communication means for receiving flow velocity data or flow rate data transmitted from the first communication means of a flow velocity or flow rate measuring device comprising first communication means for transmitting the flow velocity data or flow rate data to the outside. And an instrument discriminating unit that discriminates an instrument used based on the flow rate data or flow rate data received by the second communication unit, and the flow rate data or the flow rate data transmitted by the first communication unit is: characterized in that it comprises a change in the flow velocity or flow rate during the rising, the appliance discriminating unit, which performs determination of the instrument in conjunction with the start of operation of the first communication means That.

  This eliminates the need for high-performance computing means required for instrument discrimination inside the flow velocity or flow rate measurement device and the installation of a large-scale power source to operate it, and the realization of a compact device that prioritizes measurement, Highly accurate external instrument discrimination can be realized.

1st invention is the instrument discriminating apparatus , The fluid measurement means which measures the flow velocity or flow volume arrange | positioned in the flow path through which the to- be-measured fluid flows, The said fluid measurement means only when the flow velocity value or flow volume value by a fluid measurement means changes The second communication for receiving the flow velocity data or the flow rate data transmitted from the first communication means of the flow velocity or the flow rate measuring device, the first communication means for transmitting the flow velocity data or the flow rate data measured in step 1 to the outside. Flow rate data or flow rate data transmitted by the first communication unit, and a device discriminating unit for discriminating a device used based on the flow rate data or flow rate data received by the second communication unit. Includes a change in flow velocity or flow rate at the time of rising, and the appliance determination means determines the appliance in conjunction with the start of operation of the first communication means. Ukoto characterized in, the arithmetic means and the flow velocity or flow rate measurement device inside the required appliance discriminating high-performance, it is not necessary to provide a large power in order to work it, priority measurement small This makes it possible to realize an apparatus that is highly accurate and externally distinguishable instruments.

Since the second invention uses the information terminal as the communication means of the first invention in particular, the portable terminal such as a personal computer, mobile phone or PDA as a network terminal has the communication means. By introducing software, etc., it becomes possible to easily and conveniently perform instrument discrimination.

The third invention uses electrical means as the communication means of the first invention in particular to perform wired information transmission and wireless information transmission at low cost and high reliability, and exchange information with low power. The power supply portion on the measurement device side can be configured with small power saving.

In the fourth invention, in particular, by using optical means as the communication means of the first invention, it is possible to eliminate malfunctions of the measuring device due to external noise as compared with electrical communication means, and to reduce power consumption. Information can be transmitted even in environments that are difficult to use.

The fifth invention uses ultrasonic waves as the communication means of the first invention in particular. For example, when fluid measurement is performed using an ultrasonic element, the ultrasonic waves as the measurement means can be used as information transmission means. As a result, information can be directly transmitted to the inside of the pipe or the pipe member without providing a separate communication means, and communication with the external device discrimination means can be performed.

(Embodiment 1)
The flow velocity or flow rate measuring apparatus and instrument discriminating apparatus of the present invention relating to Embodiment 1 will be described. As a description of the flow velocity or flow rate measurement device, a measurement method using ultrasonic waves is used, but it is not limited to this method.

  FIG. 1 is a block diagram of a flow velocity or flow rate measuring apparatus showing the configuration of the first embodiment.

  In FIG. 1, 2 is a gas meter, 3 is a gas pipe, and 4 is a gas appliance. Inside the gas meter 2 is a fluid measuring means 11 for measuring the velocity or flow rate of the fluid, a first communication means 12 for communicating information of the fluid measuring means 11 to the outside, the fluid measuring means 11 and the first fluid measuring means 11. Control means for controlling the communication means 12 is provided. Further, outside the gas meter 2 is provided with a second communication means 14 and an appliance discriminating means 15 that is connected to the second communication means and is connected to the gas pipe to determine the appliance being used. FIG. 2 is a block diagram showing the operation of the fluid measuring means 11.

  A flow path 3 through which a fluid to be measured, here a gas flows, and a first vibrator 32 and a second vibrator 33 that transmit and receive ultrasonic waves arranged in the flow path 3 are installed, and the first vibrator Transmission means 34 for driving 32, reception means 35 for receiving a reception signal of the second vibrator 33 and determining reception timing, the transmission means 34, the first vibrator 32, and the second vibrator 33. Switching means 36 is provided between the first vibrator 32 and the second vibrator 33 so as to alternately transmit and receive ultrasonic waves.

  The flow rate calculating means 41 receives the output of the receiving means 35, measures the number of operations of repeating the transmission / reception of the ultrasonic wave again via the transmitting means 34, and repeats the repeating means 37 that stops the operation at a predetermined number of times. A delay unit 38 that receives the signal 37 and outputs it as a trigger signal of the transmission unit 34 with a predetermined delay time, and at least from the start of driving of the first vibrator 32 by the transmission unit 34 to the stop of the operation of the repetition unit 37. It has time measuring means 39 for measuring the propagation time of the ultrasonic wave, and calculating means 40 for calculating the flow velocity between the pair of vibrators from the value of the time measuring means 39 and obtaining the flow rate therefrom.

  Further, a measurement control means 42 is provided, and a measurement start signal for operating the transmission means 34 is output. Furthermore, a power supply 43 for supplying power, a booster 44 for driving a load having a higher voltage than the power supply, and a power supply controller 45 for controlling the power supply 43 and the booster 44 are provided.

  Also, a storage means 46 that stores the set values of the transmission means 34, the reception means 35, the switching means 36, and the flow rate calculation means 41, and a control means 47 that sends the set values of the storage means 46 to each means after the power source 43 is turned on. It has.

A normal flow rate or flow rate measurement operation will be described. Upon receiving the start signal from the measurement control means 42, the transmission means 34 pulse-drives the first vibrator 32 for a certain period of time, and at the same time, the time measurement means 39 starts measuring time by the signal from the measurement control means 41. Pulse-driven first vibrator 3
From 2, ultrasonic waves are transmitted. The ultrasonic wave transmitted from the first vibrator 32 propagates through the fluid to be measured and is received by the second vibrator 33. The reception output of the second vibrator 33 amplifies the signal by the receiving means 35 and then determines the reception of the ultrasonic wave at the signal level at a predetermined reception timing. When the repeated operation is not performed, the operation of the time measuring means 39 is stopped when the reception of the ultrasonic wave is determined, and the flow velocity is obtained from the time information t by (Equation 1).

(The measurement time obtained from the time measuring means 39 is t, the effective distance in the flow direction between the ultrasonic transducers is L, the sound velocity is c, and the flow velocity of the fluid to be measured is v.)
v = (L / t) -c (Formula 1)
The receiving means 35 is usually configured to compare the reference voltage and the received signal by a comparator.

  In the current operation using the repeating unit 37, the determination result of the receiving unit 35 is delayed by a delay unit 38 for a certain period of time, then returned to the transmitting unit 34 and transmitted again. The repetitive operation is performed a predetermined number of times, the time is measured by the time measuring means 39, and the flow velocity is obtained by the calculation of (Equation 2) based on the measurement time of the time measuring means 39.

(The delay time of the delay means is Td, the number of repetitions is n, the measurement time is ts, the effective distance in the flow direction between the ultrasonic transducers is L, the speed of sound is c, and the flow velocity of the fluid to be measured is v.)
v = L / (ts / n−Td) −c (Expression 2)
According to this method, it is possible to measure with higher accuracy than the method of (Equation 1).

  Further, the first ultrasonic transducer 32 and the second ultrasonic transducer 33 are switched, and the respective propagation times of the fluid under measurement from upstream to downstream and from downstream to upstream are measured. Find v.

(Measurement time from upstream to downstream is t1, and measurement time from downstream to upstream is t2.)
v = L / 2 ((1 / t1)-(1 / t2)) (Formula 3)
According to this method, the flow rate can be measured without being affected by the change in the sound speed, and thus it is widely used for measuring the flow velocity, the flow rate, the distance, and the like. When the flow velocity v is obtained, the flow rate can be derived by multiplying it by the cross-sectional area of the flow path 1.

  Normal operation is as shown in the timing diagram of FIG. That is, measurement is started from the start signal at time t0 by the measurement control means 42, and the first ultrasonic transducer 32 is driven via the transmission means 34 at t1. The ultrasonic signal generated there propagates in the flow path, reaches the second ultrasonic transducer 33 at time t2, and when the reception means detects the reception point, the repeat means 37 does not reach the set number of times. A signal is sent to the means 38. Then, the delay means 38 starts operating from time t3, operates for a predetermined time, and then sends a signal to the transmitting means 34 at time t4 to drive the first ultrasonic transducer 32 again. This is repeated below.

  When the number of times determined by the repeating means 37 is operated, the transmission / reception operation stops at time t5 in FIG. 2, and the time is T shown in the figure. Thereafter, the switching means 36 switches between transmission and reception. That is, the first ultrasonic transducer 32 is the reception side, and the second ultrasonic transducer 33 is the transmission side. Then, the same repeated operation is performed.

  Although the flow velocity and the flow rate can be obtained in this way, it is not possible to know what the instrument is used on the downstream side from the output signal of the fluid measuring means 11 alone.

Then, the method to determine the instrument currently used when the flow volume flows is demonstrated. When the flow rate flows, a signal is input from the flow rate calculation unit 41 to the control unit 13, and the control unit 13 communicates the flow rate data to the outside via the first communication unit 12. The second communication means installed outside receiving the signal from the first communication means passes the sent flow rate data to the instrument discrimination means 15. This data can be set in various ways, such as the rise of flow velocity, integrated flow rate, and maximum flow rate.

  In addition, the flow velocity or flow rate measurement device using ultrasonic waves described in this embodiment does not measure the volume as in the conventional membrane measurement, but detects the instantaneous flow velocity, so the flow velocity Can be measured in the time specified by the sampling time. In general, the sampling time is set in units of seconds depending on the usage time of the power capacity installed in the meter. However, in some cases, sampling in seconds or less is also possible in principle. This method makes it easy to identify changes in flow velocity and rise in flow rate.

  Further, information on the flow velocity or flow rate of the fluid flowing in the flow path is communicated to the outside via the first communication means 12, where calculation and database are referred to, and the meter 1 is based on the sent information. By determining the instrument 4 used on the downstream side, it is not necessary to install a high-performance computing means necessary for instrument discrimination inside the measuring device or a large-scale power source to operate it. It is possible to realize an apparatus that prioritizes measurement and to perform highly accurate external instrument discrimination.

  The appliance discriminating means 15 having the second communication means 14 may be a large communication center as a gas supply source. In that case, you may have a large database of various data of the area you are supplying, such as temperature, wind speed, weather, gas usage pattern throughout the year of each household, installation equipment, flow consumption change data for each equipment, etc. Using the data and the flow rate information sent from each first communication means 12, it is possible to determine the instrument using a large arithmetic device.

  In that case, the problem of power at the time of calculation is eliminated, and high-speed simulation and its coefficient can be easily changed. In addition, it is not necessary to output the calculation result instantaneously, and there may be a case where it can be known until the next meter reading as well as a delay of several minutes. In such a case, it becomes possible to perform highly accurate appliance discrimination by effectively utilizing the idle time of an expensive high-speed arithmetic device.

  FIG. 4 shows an example of timing at which the first communication means 12 operates after the flow rate has flowed. When a flow rate is generated as shown in FIG. 4A, the normal flow rate measurement is performed with a sampling interval as shown in FIG. 4B. When the control unit 13 recognizes that there is a flow rate at time t0 from the result of the flow rate calculation unit 41, the first communication unit is controlled so as to continue to operate until t2 when the flow rate disappears as shown in (c), Information may be sent to a second communication means provided outside. Also, as shown in FIG. 4D, the control means 13 may operate the first communication means 12 only when the flow rates change at times t0, t1, and t2 to transmit the information to the outside.

  When the first communication means starts transmission, the second communication means 14 that has received the signal starts reception as shown in FIG. 5 (a), and from the start of reception, the instrument determination means 15 becomes like (b). Instrument discrimination is started from information such as flow rate and flow rate change sent to the. If the time and the like are managed on the appliance discrimination means 15 side, the amount of information to be communicated can be reduced.

  Further, even when the second communication means 14 only receives the flow rate change point as shown in FIG. 5C, the flow rate that the appliance discrimination means 15 has transmitted as shown in FIG. Instrument discrimination is started from information such as changes in flow rate and flow rate.

In some cases, the appliance discrimination can be recognized only by the rise information of the flow rate change, but if there is information such as the usage time or the change in the usage flow rate, the discrimination accuracy increases, and the calculation time may be longer.

  Even in such a case, the appliance discriminating means does not always operate, but when the first communication means starts communication, the appliance discriminating means starts the appliance discrimination, so that the external judging means also performs useless operation. It is possible to save power and reduce the operation load of the determination means by performing an operation of determining an appliance that uses the fluid only when there is a flow of the fluid.

  Further, the appliance discriminating means 15 provided outside is not a centralized monitoring system such as a large computing means, but is an internet terminal personal computer that is a home communication terminal device or a communication terminal connected as a home LAN. Alternatively, a mobile phone or PDA may be used as the second communication means. By using these, it is possible to display information on appliances that have been recently used in home or on-the-go PDAs.

  And since the appliance discrimination means 15 can be installed near the user, the load of communication to the outside can be reduced, and since the data to be calculated is only information related to the home, it is possible to obtain a result quickly. become. Furthermore, it becomes possible to perform appliance discrimination without providing information such as flow rate or usage time that is not so much known to others.

  For example, when the appliance is discriminated from the function f (Q, t) of the flow rate Q and the usage time t as the calculation means 151 in the appliance discriminating means 15, the storage means 152 that stores past use patterns, basic data of the appliance, and the like. It is also possible to have an input means 153 that allows the user to update the information in the storage means or to input appliance discrimination as a teaching signal to the arithmetic means.

  The computation of f (Q, t) is large-scale or complicated. If it is complicated, use a facility such as a centralized monitoring center with a high computing capacity. The information can be sent to the terminal device. The information terminal can further perform calculation based on the sent information, and can continue to determine the appliance connected to the pipe 3 and used. In this way, when the computing capability is insufficient due to the complexity of the information sent by the communication means, it is possible to determine the appliance with higher accuracy by further transferring the information to a place where the processing is possible.

  In this way, when the second communication means 15 uses the information terminal, the software is introduced because the portable terminal such as a personal computer, a mobile phone, or a PDA as a network terminal has the communication means. Thus, it is possible to easily and conveniently perform instrument discrimination.

  As the flow velocity or flow rate measurement device of this embodiment, an ultrasonic method for measuring gas is described, but the fluid is not limited to gas, and the same thing can be applied to water supply and other fluids. I can think of what I can do.

  It is also possible to realize the same thing for plants and collective facilities.

(Embodiment 2)
The flow velocity or flow rate measuring device and instrument discriminating device of the present invention relating to Embodiment 2 will be described. A difference from the first embodiment is a method of connecting communication means.

  This is because it is necessary to improve the accuracy of information transmission by using various communication methods depending on the place of use.

  This will be described with reference to FIGS. 1, 2, 4 and 7. As shown in the first embodiment, the flow velocity or flow rate measuring device is connected upstream of a gas pipe, a water pipe, and other various fluid pipes, and performs communication so as to discriminate a downstream instrument. Usually, such a measuring device is rarely installed in a good environment, such as in a place where it is struck with bad sunlight or inside a meter box surrounded by an iron container. Therefore, it is necessary to set a reliable transmission path so that information transmission between the first communication unit 12 and the second communication unit 14 is performed with high quality. In addition, when used for general households, it is considered that the use and spread cannot be achieved even if a very expensive method is used, and the cost is also an important factor.

  Therefore, the first communication means 12 and the second communication means 14 are normally electrically connected as shown in FIG. The cheapest and most reliable method is to connect by wire. According to this method, the control means 13 is not a transmission method that requires special power because it only needs to send an electrical signal when operating the first communication means 12, and can operate with a small amount of power over a long period of time. It is. Electrical means include not only wired but also wireless. In the case of communication with a low transmission frequency as shown in FIG. 4D, the problem of power does not become so great even if radio is used.

  By making a simple connection, information can be reliably transmitted to the outside of the measuring apparatus, thereby increasing the accuracy of instrument discrimination.

  In this way, by using electrical means as a communication method, it is possible to perform wired information transmission and wireless information transmission at low cost and high reliability, and to exchange information with low power. The power supply portion can be configured with small power saving.

  In addition, there is a possibility of electric leakage when measuring leakage due to high water leakage and humidity as the measurement device installation environment. In order to transmit to the 2nd communication means 14, a device is required.

  For example, as shown in FIG. 7B, an electro-optical conversion unit 121 is provided at the output of the first communication unit 12 to convert an electric signal into light, thereby establishing an optical propagation path. An optical fiber or the like is useful as the optical transmission means 17. It is also possible to transmit optically directly in the atmosphere. On the receiving side, an optical-electric conversion means 141 is provided upstream of the second communication means 14 to convert an optical signal into an electrical signal, and then the information is transmitted to the instrument determination means 15.

  High-quality signal transmission is possible even if valves, motors, or the like that may generate electromagnetic noise exist in the path.

  In this way, the communication method uses optical means, so that it is possible to eliminate malfunctions of the measuring device due to external noise compared to electrical communication means, and to transmit information even in an environment where power is difficult to use. It becomes possible.

  Further, when ultrasonic waves are used as the flow velocity or flow rate measuring device, the vibrators 32 and 33 can be used as signal generation sources.

For example, as shown in FIG. 7C, a plurality of flow rate measuring devices exist in the gas pipe 3, and a plurality of instruments are connected to the downstream thereof, although not shown in the drawing. The flow rate of each flow velocity or flow rate measuring device is measured by a vibrator, and the control means 13 uses the vibrator to transmit flow rate information as an ultrasonic signal and transmits the inside of the pipe during the time not used for measurement. Alternatively, the surface or the inside of the piping member itself is ultrasonically transmitted as a solid propagation. It is possible to receive the flow rate information sent from the vibrator 32 or 33 by installing the ultrasonic vibrator 142 in the previous stage of the second communication means 14 connected to a part of the pipe 3. The signal is sent to the instrument discrimination means 15.

  As described above, when the communication method uses ultrasonic waves, for example, when fluid measurement is performed using an ultrasonic element, the ultrasonic wave, which is the measurement means, is also used as an information transmission means, and no separate communication means is provided. It is possible to communicate information directly with the inside of the pipe or the pipe member to communicate with an external appliance discriminating means.

(Embodiment 3)
The flow velocity or flow rate measuring device and instrument discriminating device of the present invention relating to Embodiment 3 will be described. The difference from the first embodiment is that a storage medium 50 having a program for causing a computer to function to ensure the operation of the first communication means and the control means 13 for collecting measurements is used.

  In order to perform the operation of the control means 13 shown in Embodiment 1 and Embodiment 2 in FIG. 2, the time until the communication state is established in advance through experiments or the like, transmission output change, secular change, temperature change, Correlation such as operation timing is obtained with respect to the stability of the system, and software is stored in the storage medium 50 as a program. Usually, it is convenient to use an electrically writable memory such as a microcomputer memory or a flash memory.

  As described above, when the operation of the control means 13 can be performed by a program, it is possible to easily set and change transmission / reception conditions in communication, and it is possible to flexibly cope with secular change and the like, so that it is possible to more flexibly determine the device The accuracy of communication content quality can be improved. In the present embodiment, operations other than the control means 13 may be performed by a program using a microcomputer or the like.

  In this way, it is configured to have a program for causing the computer to function as a control means, which makes it easy to set and change the operation of the measurement method and communication means, and to flexibly cope with aging etc. It is possible to improve the accuracy of measurement and improve the determination rate of instrument discrimination flexibly.

  The flow velocity or flow rate measuring device and the instrument discriminating method of the present invention transmit flow rate information between the first communication means installed in the measurement device and the second communication means installed externally, It is used to identify the appliance.

  In this way, information on the flow velocity or flow rate of the fluid flowing inside the flow channel is communicated to the outside, where calculations and databases are referred to, and by determining the instrument that is operating based on the sent information, It eliminates the need for high-performance computing means necessary for instrument discrimination inside the measuring device and the installation of a large-scale power source to operate it, realizing a compact device that prioritizes measurement, and high accuracy outside. Instrument discrimination can be realized.

Overall block diagram of the flow velocity or flow rate measuring device of the present invention Block diagram of the same flow rate or flow rate measuring device (A) Timing diagram showing the operation of the measurement control means in the measuring device (b) Timing diagram showing the operation of the transmitted wave in the measuring device (c) Timing diagram showing the operation of the received wave in the measuring device (d) Timing chart showing operation of delay means in measuring device (A) Timing diagram showing flow rate change in Embodiment 1 of the present invention (b) Timing diagram showing the measurement sampling (c) Timing diagram showing operation of the first communication means (d) First communication Timing diagram showing the operation of the means (A) Timing diagram showing operation of second communication means (b) Timing diagram showing operation of appliance discrimination means (c) Timing diagram showing operation of second communication means (d) Appliance discrimination means Timing diagram showing the operation of Block diagram showing connections around the appliance discriminating means (A) Block diagram showing the connection of the first and second communication means (b) Block diagram showing the connection of the first and second communication means (c) Connection of the first and second communication means Block diagram showing Overall block diagram of a conventional instrument discrimination device Block diagram of a conventional instrument discrimination device

2 Gas meter 3 Flow path 4 Instrument 11 Fluid control means 12 First communication means 13 Control means 14 Second communication means 15 Instrument discrimination means 17 Optical transmission means 32 First vibrator 33 Second vibrator 34 Transmitter 35 Receiving means 41 Flow rate calculating means 43 Power supply 44 Boosting means 45 Power supply control means 48 Opening and closing means 50 Storage medium

Claims (5)

Fluid measuring means for measuring the flow velocity or flow rate arranged in the flow path of the fluid to be measured, and the flow velocity data or flow rate data measured by the fluid measuring means only when the flow velocity value or flow value by the fluid measuring means changes Second communication means for receiving flow velocity data or flow rate data transmitted from the first communication means of a flow velocity or flow rate measuring device comprising: a first communication means for transmitting to
Instrument discriminating means for discriminating an instrument used based on flow velocity data or flow rate data received by the second communication means,
The flow rate data or flow rate data transmitted by the first communication means includes a change in flow rate or flow rate at the time of rising ,
The appliance discriminating apparatus, wherein the appliance discriminating unit discriminates an appliance in conjunction with the start of operation of the first communication unit. The appliance discriminating apparatus according to claim 1, wherein the second communication means uses an information terminal. The appliance discriminating apparatus according to claim 1 , wherein the communication method uses electrical means. The instrument discrimination apparatus according to claim 1 , wherein the communication method uses optical means. The instrument discrimination apparatus according to claim 1, wherein the communication method uses ultrasonic waves.

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