JP2007212469A - Using tool determination system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To specify a using tool, in a fluid piping system for supplying a fluid to a plurality of tools by one supply flow passage. <P>SOLUTION: The fluid piping system for supplying the fluid to the plurality of tools by the one supply flow passage 5 includes a flow measuring part 6 arranged in the supply flow passage 5, a detecting part 7 for the start of tool use, a control part 8 for the flow measuring part 6, and a judging part 9 for specifying the using tool, based on a signal from the flow measuring part 6. The flow measuring part is controlled thereby to enhance determination precision for the tool. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a system for specifying a tool to be used in a fluid piping system.

  Conventionally, there has been one such a system as described in Patent Document 1. In this example, an appliance to be used is discriminated among a plurality of appliances connected to the gas meter, as shown in FIG.

1 is a meter, 2a and 2b are gas appliances. Inside the meter 1, a flow rate measuring unit 3 and a flow rate calculating unit 4 are provided. The flow rate measuring unit 3 measures the total flow rate of the gas appliances 2a and 2b, analyzes the change in the total flow rate by the algorithm of the flow rate calculation unit 4, and determines the gas appliance to be used.
JP-A-3-331732

  However, the above conventional method uses a normal flow measurement signal to determine the instrument, and is a passive detection method. There was a problem that ability was low.

  In order to solve the above-described conventional problem, the use instrument discrimination system of the present application is a fluid piping system that supplies fluid from one supply channel to a plurality of instruments, and a flow rate measurement unit disposed in the supply channel; An instrument use start detection unit that detects a signal when the instrument is used, a control unit that inputs a signal from the instrument use start detection unit and controls the flow measurement unit, and a signal from the flow measurement unit And a determination unit that identifies the appliance to be used.

  As a result, a transitional flow rate change can be captured by the appliance use start signal, and when the appliance is used, the flow rate rising state peculiar to the appliance can be detected, and the appliance used can be determined with high accuracy.

  Since the present invention controls the flow rate measurement based on the instrument use start signal, it is possible to accurately grasp the state of the instrument start-up, improve the instrument discrimination accuracy, and increase the measurement frequency by the control unit. Therefore, there is an effect that it is possible to improve the discrimination accuracy of the instrument.

  1st invention is the fluid piping system which supplies a fluid from one supply flow path to several instrument, The flow measurement part arrange | positioned at the said supply flow path, The said instrument use start detection part, The said flow measurement part A control unit, and a determination unit that identifies the appliance to be used based on a signal from the flow rate measurement unit. And since the flow measurement part is controlled by the signal of a detection part, the instrument used can be specified.

According to a second aspect of the present invention, in the fluid piping system for supplying fluid to a plurality of instruments from one supply channel, an ultrasonic flow rate measurement unit disposed in the supply channel, the instrument use start detection unit, It has a control part of a flow measurement part, and a judgment part which specifies a use instrument by a signal from the flow measurement part. Then, since the ultrasonic flow rate measuring unit is controlled by the signal from the detecting unit, it is possible to specify the instrument to be used.

  According to a third aspect of the present invention, there is provided a fluid piping system for supplying fluid to a plurality of instruments from one supply channel, a flow rate measuring unit disposed in the supply channel, a physical quantity detection unit for starting use of the instrument, and the flow rate It has a control part of a measurement part, and a judgment part which specifies a use instrument by a signal from the flow measurement part. And since a flow measurement part is controlled by the signal of a physical quantity detection part, the instrument to be used can be specified.

  4th invention is the fluid piping system which supplies a fluid from one supply flow path to several instruments, The flow volume measurement part arrange | positioned at the said supply flow path, The flow volume detection part of the said instrument use start, The said flow volume It has a control part of a measurement part, and a judgment part which specifies a use instrument by a signal from the flow measurement part. And since a flow measurement part is controlled by the signal of a flow volume detection part, the instrument used can be specified.

  According to a fifth aspect of the present invention, there is provided a fluid piping system for supplying fluid from a single supply flow path to a plurality of instruments, a flow rate measurement unit disposed in the supply flow path, a detection unit for starting use of the instrument, and the flow rate measurement. A control unit that increases the measurement frequency of the unit, and a determination unit that identifies the appliance to be used based on a signal from the flow rate measurement unit. And since the instrument use start signal from the said instrument use start detection part is input and the measurement frequency of a flow measurement part is increased with the signal of a detection part, the instrument used can be specified.

  6th invention is the fluid piping system which supplies a fluid from one supply flow path to several instruments, The ultrasonic flow measurement part arrange | positioned at the said supply flow path, The detection part of the said instrument use start, It has a control part which reduces the number of times of the sing around of a flow measurement part, and a judgment part which specifies a use instrument by a signal from the flow measurement part. And, in order to substantially increase the number of times of measurement by reducing the number of times of flow around the flow measurement unit by inputting the device use start signal from the device use start detection unit, the identification of the device used Can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a device used discrimination system according to Embodiment 1 of the present invention, FIG. 2 is a configuration diagram of a flow rate measurement unit of the system, and FIG. 3 is a flowchart of a determination unit of the system.

  1 to 3, 6 is a flow rate measurement unit, 7 is a detection unit (appliance use start signal detection unit), 8 is a control unit, 9 is a determination unit, and 10 is an instrument.

  11 is a flow path, 12 is a first ultrasonic transducer, and 13 is a second ultrasonic transducer.

  Reference numeral 14 denotes a transmission unit, 15 denotes a reception unit, and 16 denotes a switching unit. Reference numeral 17 denotes a signal processing unit, which includes a time measuring unit 18 and a flow rate calculating unit 19. Reference numeral 20 denotes a switching control unit.

  21 is a start command, 22 is a flow rate measurement command, 23 is a flow rate change determination command, 24 is an interval setting command, 25 is a measurement frequency increase command, 26 is a rising waveform creation command, 27 is an instrument pattern comparison determination command, 28 is an interval setting A command, 29 is an appliance specifying command, and 30 is a condition setting command.

Next, the operation and action will be described. First, normal flow measurement will be described. In this case, the switching unit 16 is first connected to C and A to D. That is, the signal emitted from the transmission unit 14 is transmitted from the first vibrator 12 through the switching unit 16 and reaches the second vibrator 13 through the flow path 11. This signal is received by the receiving unit 15 via the switching unit 16.

  In the above process, the signal sent from the transmitter 14 enters the timer 18 at the same time, and the signal received by the receiver 15 also enters the timer 18. The time difference between these signals is measured by the timer 18 to obtain the elapsed time (T1).

  Next, the switching unit 16 connects A to C and B to D. As a result, this time is transmitted from the second vibrator 13, and the elapsed time (T 2) until it reaches the first vibrator 12 through the flow path 11 is obtained.

  Based on the elapsed times T1 and T2 measured in this way, the flow rate calculation unit 19 calculates the flow rate by the following calculation formula.

  Now, assuming that the angle between the flow to be measured and the ultrasonic propagation path P is θ, and the distance between the first vibrator 12 and the second vibrator 13 is L, the flow velocity v is expressed by the following equation. Is calculated by

v = (L / 2 cos θ) ((1 / T1) − (1 / T2)) (1)
The flow rate is calculated by multiplying this by the correction coefficient for obtaining the average flow velocity and the cross-sectional area.

  In order to increase the accuracy of measurement by such a method, a method called sing-around, which is performed repeatedly during transmission and reception, may be employed. In this case, T1 and T2 adopt the average value.

  Now, when a certain instrument is used, the signal is captured by the detection unit 7. This signal itself is not a physical quantity with which the device can be specified, but is simply a signal that the device has been used. This is a kind of increase in the flow rate in the flow rate calculation unit 19 described above. In this case, the flow rate calculation unit 19 itself becomes the detection unit 7.

  Upon receiving this signal, the control unit 8 sends an instruction to the flow rate measuring unit 6. The control unit 8 corresponds to the switching control unit 20 in FIG. These series of movements are processed by the flow of the determination unit 9.

  In FIG. 3, the program is started by the start instruction 21. The normal flow rate measurement described above is performed by the flow rate measurement command 22. Here, when any of the appliances 10 is used, a flow rate change occurs, which is set to Yes by the flow rate change determination command 23. If the appliance 10 is not started up, the answer is No, and the same operation is repeated after the time set by the interval setting command 24.

  When the flow rate change is detected, the switching control unit 20 starts high-speed sampling by the measurement frequency increase command 25. Based on the detailed data obtained in this way, a rising waveform of the flow rate is formed by the rising waveform creation command 26. This is compared with the rising pattern registered in advance by the appliance pattern comparison judgment command 27, and when there is a match, the appliance to be used is specified by the appliance specifying command 30. Thereafter, a safety condition for the appliance specified by the condition setting command 30 is given.

  If it does not match, it is due to another factor, so the No side is taken, and after the time determined by the interval setting command 28, the above contents are repeated again.

  As described above, the instrument is identified with high accuracy by performing high-speed measurement in accordance with the start of use of the instrument.

(Embodiment 2)
FIG. 4 is a determination flowchart of the used appliance determination system according to the second embodiment of the present invention.

  The second embodiment is different from the first embodiment in that the physical quantity change determination command 31 is replaced with the target of the detection unit as a physical quantity. In this case, the physical quantity includes a sound wave, an ultrasonic wave, a pressure, and the like generated with the start of use of the instrument.

  In addition, the thing of the same code | symbol as Embodiment 1 has the same structure, and abbreviate | omits description.

  Next, the operation and action will be described. After the flow rate measurement command 22, when there is a physical quantity change accompanying the start of use of the instrument, a physical quantity change determination command 31 is executed, and then a measurement frequency increase command 25 is executed. The following operations are the same as those in the first embodiment.

(Embodiment 3)
FIG. 5 is a determination flowchart of the used appliance determination system according to Embodiment 3 of the present invention.

  The third embodiment is different from the first embodiment in that the measurement frequency increase command 25 is replaced with a single-around number decrease command 32.

  In addition, the thing of the same code | symbol as Embodiment 1 has the same structure, and abbreviate | omits description.

  Next, the operation and action will be described. After the flow rate measurement command 22, when there is a flow rate change accompanying the start of use of the appliance, a flow rate change determination 31 is performed, and then a sing-around reduction command 32 is performed. The following operations are the same as those in the first embodiment.

  As described above, the appliance discrimination system according to the embodiment of the present invention controls the flow rate measurement based on the appliance usage start signal, so that it is possible to accurately grasp the state of the appliance rise and improve the appliance discrimination accuracy. There is an effect.

  Moreover, since an ultrasonic flowmeter is used for flow rate measurement, an instantaneous value of the flow rate can be obtained, and there is an effect that the discrimination accuracy of the instrument can be improved.

  Further, since the physical quantity is used as the instrument use start signal, the start signal can be accurately captured, and the instrument discrimination accuracy can be improved.

  In addition, since the flow rate is used as the instrument use start signal, the signal of the flow rate measurement unit can be shared, and there is an effect that a more efficient system can be constructed.

  In addition, since the control unit increases the measurement frequency, there is an effect that the accuracy of determining the appliance can be improved.

  In addition, since the control unit reduces the number of times of sing-around, a large amount of flow rate data can be obtained in a short time, and the instrument discrimination accuracy can be improved.

The block diagram of the used appliance discrimination | determination system in Embodiment 1 of this invention Configuration diagram of the flow measurement part of the system Flow chart of the determination unit of the system The flowchart of the judgment part of the used appliance discrimination system in Embodiment 2 of this invention The flowchart of the judgment part of the used appliance discrimination | determination system in Embodiment 3 of this invention Block diagram of a conventional appliance discrimination system

Explanation of symbols

5 Supply channel 6 Flow rate measurement unit 7 Detection unit
8 Control part 9 Judgment part

Claims (6)

In a fluid piping system for supplying fluid to a plurality of instruments from one supply channel, a flow rate measuring unit arranged in the supply channel, and an instrument use start detecting unit for detecting a signal when the instrument is used, A use appliance discriminating system comprising: a control unit that inputs a signal from the appliance use start detection unit and controls the flow rate measurement unit; and a determination unit that identifies a use appliance based on the signal from the flow rate measurement unit. The used appliance discrimination system according to claim 1, wherein the flow rate measuring unit is constituted by an ultrasonic flow meter. The appliance usage determination system according to claim 1 or 2, wherein the appliance usage start detection unit uses a physical quantity signal. 3. The device used discrimination system according to claim 1, wherein the device use start detection unit uses a flow rate signal of the flow rate measurement unit. The use appliance discrimination system according to claim 1, 2, 3, or 4, wherein the control unit inputs an appliance use start signal from the appliance use start detection unit to increase the measurement frequency. The use appliance discriminating system according to claim 2 or 4, wherein the control unit inputs an appliance use start signal from the appliance use start detection unit to reduce the number of times of single-around.

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