JP2006200800A - Flow rate or flow-measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the accuracy in discriminating an appliance by implementing calculation at a place having no influence on a capacity of electric power while reducing communication frequency by temporarily storing the data on flow rate or flow in a storing means to some extent, and to reduce the load on ordinary flow measurement. <P>SOLUTION: This flow rate or flow-measuring device measures flow rate or flow of fluid flowing in a flow channel by the fluid-measuring means 41, and the information is temporarily stored in the storing means 12, and then transmitted to the outside by a first communication means 13 as a whole. An instrument-discriminating means 15 implements the calculation and reference of database in an external environment of good electric power condition, and the operating instrument is determined on the basis of the transmitted information. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a flow velocity or flow rate measuring device that measures a flow rate of gas, liquid, etc. using an ultrasonic wave using a vibrator, etc., and discriminates a used instrument connected to the flow path. Regarding the method.

  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 the 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 problem, and once the flow rate data is accumulated in the storage means to some extent, the information is collected and communicated from the fluid measuring device to the outside, so that the communication frequency is reduced and the power capacity is not a problem. The purpose is to increase the accuracy of appliance discrimination by performing calculations at the place and to reduce the load on normal flow measurement.

  In order to solve the above-described conventional problems, the flow velocity or flow rate measuring device of the present invention measures the flow velocity or flow rate of the fluid flowing through the flow path by the fluid measurement means, and temporarily stores the information in the storage means, and determines the predetermined flow rate or flow rate. After the amount of information is reached, the information is sent from the fluid measuring device to the outside via communication means while reducing the communication frequency. Reference is made to computations and databases in an environment with good external power conditions, and a device that is operating is determined based on the information sent.

  It is also possible to perform the operation of returning the determined instrument data to the flow velocity or flow rate measuring device again using the communication means.

  The flow velocity or flow rate measuring device of the present invention temporarily stores information on the flow velocity or flow rate in the storage means, communicates to the outside collectively after reaching a predetermined amount of information, and refers to calculations and databases there, The device that is operating is determined based on the information that has been sent.

  This eliminates the need for high-performance computing means necessary for instrument discrimination inside the measuring device and the need to install a large-scale power source to operate it. It is possible to realize highly accurate appliance discrimination, and reduce the frequency of communication with the outside, thereby reducing the load on the power source, saving power, and performing a long-term operation.

  According to a first aspect of the present invention, there is provided a fluid measuring means for measuring a flow velocity or a flow rate arranged in a flow path through which a fluid to be measured flows, a storage means for storing a signal of the fluid measuring means, and a first communication means for communicating with the outside. A control means for controlling the fluid measuring means and the first communication means; a second communication means provided externally for exchanging signals with the first communication means; and a second communication means connected to the second communication means. It is a flow velocity or flow rate measuring device provided with the instrument discriminating means which has the information which discriminates the instrument which is using the fluid arrange | positioned at the path | route.

  The flow rate or flow rate information is temporarily stored in the storage means, and after reaching a predetermined amount of information, the information is collectively communicated to the outside, where calculations and databases are referenced, and operations are performed based on the sent information. By determining which instrument is in use, there is no need to install a high-performance computing means necessary for instrument discrimination inside the measuring device or a large-scale power supply to operate it. Realization and high-accuracy external instrument discrimination, and by reducing the frequency of communication with the outside, it is possible to lighten the power load and save power and perform long-term operation become.

  According to the second aspect of the invention, in particular, the signal of the storage means is transmitted when the predetermined time elapses even if the information amount of the storage means for accumulating the signal of the fluid measurement means of the first invention does not reach the predetermined amount. By providing a timer means that communicates with the second communication means provided outside from the communication means, communication is performed after a certain period of time even if the frequency of fluid use is low. It can be confirmed, and it becomes possible to improve the reliability.

  The third invention is provided with a time measuring means for outputting time information, particularly in the first invention, and the storage means stores the information of the fluid measuring means and the time measuring means, thereby using an instrument for information communicated to the outside. Thus, it is possible to add items such as time, and to improve the accuracy of determination when assembling the device determination method.

  According to a fourth aspect of the invention, there is provided an integrating means for calculating the integrated flow rate in the first invention, and the storage means stores the information of the fluid measuring means and the integrating means, thereby using the instrument for information communicated to the outside. Accumulation information can be added, and it becomes possible to improve the determination accuracy by using it as determination information specific to the appliance.

  According to a fifth aspect of the invention, there is provided a changing point detecting means for detecting a changing point of the flow velocity in the first invention, and the storage means stores information on the fluid measuring means and the changing point detecting means to communicate with the outside. It is possible to add appliance usage flow rate change information to the information to be performed, and to improve the accuracy of appliance determination.

  The sixth aspect of the invention has a configuration having a program for causing a computer to function as the control means in any one of the first to fifth aspects of the invention. Therefore, the change can be easily made and the change over time can be flexibly dealt with, so that the measurement accuracy can be improved more flexibly and the judgment rate of the instrument discrimination can be improved.

(Embodiment 1)
The flow velocity or flow rate measuring device of the present invention relating to Embodiment 1 will be described. The explanation of the flow velocity or flow rate measuring apparatus uses a measuring method using ultrasonic waves, but 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, a fluid measuring means 11 for measuring the velocity or flow rate of the fluid, a storage means 12 for temporarily storing information of the fluid measuring means 11, and a first communication means for communicating the information of the storage means to the outside. 13 and control means 14 for controlling the fluid measurement means 11 and the first communication means 13. The gas meter 2 includes a second communication unit 15 and an instrument determination unit 16 connected to the second communication unit and connected to the gas pipe to determine the instrument 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 through the transmitting means 34, and repeats the means 37 for stopping the operation at a predetermined number of times. A delay means 38 that receives a signal and outputs it as a trigger signal of the transmission means 34 with a delay of a predetermined delay time, and at least ultrasonic waves from the start of driving of the first vibrator 32 by the transmission means 34 to the stop of the operation of the repetition means 37. The time measuring means 39 for measuring the propagation time of the first time and the calculating means 40 for calculating the flow velocity between the pair of vibrators from the value of the time measuring means 39 and determining 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. An ultrasonic wave is transmitted from the pulse-driven first vibrator 32. 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 (Formula 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. In addition, frequent communication increases power consumption and makes long-term continuous use difficult.

  Therefore, a method of not burdening the power supply while communicating data for appliance discrimination will be described. When the flow rate flows, a signal is input from the flow rate calculation unit 41 to the control unit 14, and the control unit 14 stores the flow rate information in the storage unit 12. When the information stored every sampling or every certain time reaches a certain amount, the control means 14 communicates the flow rate data to the outside via the first communication means 13. The second communication means 15 installed outside receiving the signal from the first communication means 13 passes the sent flow rate data to the appliance discrimination means 16. 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.

  Furthermore, information on the flow velocity or flow rate of the fluid flowing inside the flow path is temporarily stored in the storage means 12, and communicated to the outside through the first communication means 13 at once, where calculations and databases are referred to, By determining the instrument 4 used on the downstream side of the meter 1 based on the sent information, high-performance computing means required for instrument discrimination inside the measuring device and a large scale for operating it It is not necessary to install a new power supply, and it is possible to realize a small-sized apparatus that prioritizes measurement and to perform highly accurate external instrument discrimination.

  The appliance determination means 16 having the second communication means 15 may be a large communication center of 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 13, 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 14 recognizes that there is a flow rate at time t0 from the result of the flow rate calculation unit 41, the information is stored in the storage unit 12 as shown in (c). For example, the first stores time and flow rate as a set, such as M (0) = (0, Q0). The nth information is M (n) = (n, Qn). When the number of pieces of information stored in the storage unit 12 is accumulated, for example, n, the control unit 14 collects the information from M (0) to M (n) as shown in FIG. The data is transmitted from the first communication means 13 to the first communication means 15 provided outside.

  Compared to the case of constant communication when the flow rate is generated, the communication means is operated after accumulating the flow rate information, so that the power required for communication can be reduced, and the communication load is also the reception load of the second communication means. Since it is reduced, it can be greatly reduced, and instability of the system due to congestion such as mass communication can be avoided, and stable communication quality can be realized.

  In addition, when communication is waited until the capacity of the storage means 12 reaches a predetermined amount, if the system is hardly used or if it is stopped for a long period of time, for example, it is easy to accumulate information when going out for a long time. As a result, the communication condition may not be satisfied. For example, if communication is not established once a month, it is possible that information for each instrument cannot be received in the case of gas flow rate measurement, and a specific service cannot be received. Also, it is inconvenient that it is difficult to determine whether information has been accumulated or whether a problem has occurred in the communication system.

  In such a case, for example, by providing the timer means 17, the timer means 17 is operated from the start of the measurement operation or when the first communication is established. When the value of the timer means 17 reaches a predetermined time, the storage means 12 is operated. Even if the information is not accumulated, the control means 14 receives the signal from the timer means 17 and communicates the information in the storage means 12 to the second communication means 15 by the first communication means 13.

  FIG. 5 shows an example of operation timing. When a flow rate is generated as shown in FIG. 5A, the normal flow rate measurement is performed with a sampling interval as shown in FIG. 5B. When the control unit 14 recognizes that there is a flow rate at time t0 from the result of the flow rate calculation unit 41, the information is stored in the storage unit 12 as shown in (c). For example, the first stores time and flow rate as a set, such as M (0) = (0, Q0). The nth information is M (n) = (n, Qn). In this case, the timer means 17 starts operating at t0, and even when the flow rate is lost at t1 and the instrument does not operate thereafter, the timer means 17 outputs a signal at t2 when a predetermined time T elapses. By inputting this signal, the control unit 14 collects the information in the storage unit 12 from the first communication unit 13 as shown in FIG. 5D even if the information in the storage unit 12 is not sufficiently accumulated. It transmits to the 1st communication means 15 provided in.

  Even when an instrument that is not used frequently is connected to the pipe 3, it is possible to reliably determine that there is no flow rate because communication is established at regular intervals, and also to check the status of the communication system. It is possible to improve the reliability.

  In the description, the timer means is connected to the control means 14, but the timer means 14 may be provided outside the second communication means to periodically start communication from the outside.

(Embodiment 2)
The flow velocity or flow rate measuring apparatus of the present invention relating to the second embodiment will be described. What is different from the first embodiment is an information storage method in the storage unit 12.

  This is for increasing the accuracy of appliance discrimination by accumulating a small amount of information useful for appliance discrimination and communicating with the place where the appliance is used and the user using the appliance.

  This will be described with reference to FIGS. 1, 2, 4 and 6. FIG. In FIG. 6, reference numeral 18 denotes time measuring means for measuring time.

  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, it is rare that an instrument installed on the downstream side of such a measuring device is always in operation, and the operation and the stop are repeated. Some home appliances are often stopped. It is necessary to collect as much information as possible in order to accurately discriminate these instruments having a short operation time. On the other hand, considering the communication time, it is not only a problem of electric power but also a waste of communication resources that occupies a communication line for a long time and transmits it.

  Therefore, a method for transmitting optimum information with as short an information amount as possible will be described. For example, when an instrument is used and a flow rate is generated, the normal flow rate measurement is operated with a sampling interval as shown in FIG. When the control unit 14 recognizes that there is a flow rate at time t0 from the result of the flow rate calculation unit 41, the information is stored in the storage unit 12 as shown in (c).

  In that case, time information is obtained from the time measuring means 18, for example, the first stores the time and flow rate as a set such that M (0) = (t0, Q0). The nth information is M (n) = (tn, Qn). When the number of pieces of information stored in the storage unit 12 is accumulated, for example, n, the control unit 14 collects the information from M (0) to M (n) as shown in FIG. The data is transmitted from the first communication means 13 to the first communication means 15 provided outside.

  Rather than memorize the usage time, the appliance discriminating means 16 narrows down the estimation of the appliance being used based on the information communicated by storing the time of use as information, and further the flow rate. By looking at, it becomes possible to improve the accuracy of appliance discrimination.

  When the flow rate is generated, the control unit 14 not only stores the result of the flow rate calculation unit 41 in the storage unit 12, but also integrates the flow rate flowing in the integration calculation unit 19. The integrated value is stored in the storage means 12.

  If the integrated flow rate is high and the flow rate is low, and if the integrated flow rate is high and the flow rate is high as well, there is another possibility that the instrument used is different. In hot water heaters and the like, the flow rate used is large, but the usage time is short when used in the bathroom. The integrated flow rate and the usage time are stored together, sent to the first communication means 13, and transmitted to the appliance discrimination means 16 via the external second communication means 15. If there is an integrated value when determining the appliance, it is possible to estimate not only the usage time but also the progress in use, so that the appliance can be determined with higher accuracy.

  When the flow rate is generated as shown in FIG. 7A, the control unit 14 stores the result of the flow rate calculation unit 41 in the storage unit 12, but the normal flow rate measurement has a sampling interval as shown in FIG. 7B. It is working. When the control unit 14 recognizes that there is a flow rate at the time t0 from the result of the flow rate calculation unit 41, when information is stored in the storage unit 12 as shown in FIG. When it is flowing for a long time at a constant flow rate, it becomes a very redundant memory, which wastes power. Therefore, as shown in FIG. 7 (d), when an abnormality occurs in a certain range, the time or time and the flow rate are sent to the storage means 12.

  For example, the first information at t0 in FIG. 7 is M (0) = (t0, Q0), at t1, M (1) = (t1, Q1), and at t2, M (2) = (t2, Q2). The time or time and flow rate are memorized as a set. The nth information is M (n) = (tn, Qn). When the number of information stored in the storage unit 12 is a predetermined number, for example, n, the control unit 14 collects information from M (0) to M (n) and provides the information from the first communication unit 13 to the outside. Transmit to the first communication means 15.

  Since information is stored only when the flow rate changes, the amount of information to be transmitted can be reduced, and more accurate information can be narrowed down.

(Embodiment 3)
A flow velocity or flow rate measuring apparatus 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 FIG. 2 according to the first and second embodiments, the time until the communication state is established in advance through experiments, the transmission output change, the secular change, the temperature change, etc. Correlation such as operation timing is obtained with respect to the stability of the system, and the software is stored in the storage medium 50 as a program.

  Further, the timing of storing in the storage means can be stored in the storage medium 50 as software that can flexibly cope with it. Usually, it is convenient to use an electrically writable memory such as a microcomputer memory or a flash memory. When the operation of the control means 13 can be carried out 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 changes, etc., so that the communication content quality for instrument discrimination is more flexible The accuracy 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 according to the present invention temporarily stores the flow rate information in the storage unit, and then intermittently stores the information between the first communication unit installed in the measurement unit and the second communication unit installed outside. Flow rate information is transmitted, and appliance discrimination is performed using external power or a calculation device.

  As a result, information on the flow velocity or flow rate of the fluid flowing in the flow path is temporarily stored in the storage means 12, and communicated to the outside via the first communication means 13 at once, where calculations and databases are referenced. By determining the instrument 4 used on the downstream side of the meter 1 based on the sent information, a high-performance computing means necessary for instrument discrimination inside the measuring device and a large amount of operation for operating it There is no need to install a large-scale power supply, and it is possible to realize a small-sized apparatus that prioritizes measurement and to perform highly accurate external instrument discrimination.

  Since the communication means is operated after accumulating the flow rate information, the power required for communication can be reduced, and since the communication frequency is reduced as the reception load of the second communication means, it can be greatly reduced, and mass communication System instability due to congestion and other conditions can be avoided, and stable communication quality 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 the operation of the storage means (d) Operation of the first communication means Timing diagram showing (A) Timing diagram showing flow rate change of the measuring device (b) Timing diagram showing the measurement sampling (c) Timing diagram showing operation of the timer means (d) Timing diagram showing operation of the first communication means Block diagram showing connections around the control means (A) Timing diagram showing flow rate change in Embodiment 2 of the present invention (b) Timing diagram showing the measurement sampling (c) Timing diagram showing the operation of the storage means (d) Timing showing the operation of the storage means Figure Overall block diagram of a conventional instrument discrimination device Block diagram of a conventional instrument discrimination device

Explanation of symbols

Reference Signs List 2 Gas meter 3 Flow path 4 Instrument 11 Fluid control means 12 Storage means 13 First communication means 14 Control means 15 Second communication means 16 Instrument discrimination means 17 Timer means 18 Timing means 19 Accumulation calculation means 32 First vibrator 33 Second vibrator 34 Transmitting means 35 Receiving means 41 Flow rate calculating means 43 Power supply 44 Boosting means 45 Power supply control means 48 Opening / closing means 50 Storage medium

Claims (6)

Fluid measuring means for measuring the flow velocity or flow rate arranged in the flow path of the fluid to be measured, storage means for storing signals of the fluid measuring means, first communication means for communicating with the outside, and the fluid measuring means And a control means for controlling the first communication means, a second communication means provided externally for exchanging signals with the first communication means, and connected to the second communication means and disposed in the flow path. A flow velocity or flow rate measuring device provided with appliance discriminating means having information for discriminating an appliance using a fluid. 2. The flow velocity or flow rate measuring device according to claim 1, further comprising timer means for communicating a signal of the storage means from the first communication means to a second communication means provided outside when a predetermined time has elapsed. 2. The flow velocity or flow rate measuring device according to claim 1, further comprising a time measuring unit for outputting time information, wherein the storage unit stores information on the fluid measuring unit and the time measuring unit. The flow velocity or flow rate measuring device according to claim 1, further comprising an integrating unit for calculating the integrated flow rate, wherein the storage unit stores information on the fluid measuring unit and the integrating unit. 2. The flow velocity or flow rate measuring device according to claim 1, further comprising a change point detection means for detecting a change point of the flow velocity, wherein the storage means stores information on the fluid measurement means and the change point detection means. The program for functioning a computer as a control means of any one of Claims 1-5.

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