JPH11287684A - Used appliance discrimination system - Google Patents

Abstract

(57) [Problem] To specify a device to be used in a fluid piping system for supplying a fluid from one supply channel to a plurality of devices. SOLUTION: In a fluid piping system for supplying a fluid to a plurality of appliances from one supply passage 5, a flow measurement unit 6 arranged in the supply passage 5, a detection unit 7 for starting use of the appliance, and a flow measurement unit. The control unit 8 includes a control unit 8 and a determination unit 9 that specifies a tool to be used based on a signal from the flow rate measurement unit 6. Thereby, the flow rate measuring unit can be controlled, and the accuracy of discriminating the appliance can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for specifying a device to be used in a fluid piping system.

[0002]

2. Description of the Related Art Hitherto, as one of such systems, there has been a system described in Japanese Patent Application Laid-Open No. 3-331732. In this example, the equipment to be used is determined from among a plurality of equipment connected to the gas meter, as shown in FIG.

[0003] 1 is a meter, and 2a and 2b are gas appliances. The meter 1 includes a flow rate measuring unit 3 and a flow rate calculating unit 4. In the flow measuring unit 3, the gas appliance 2
The total flow rates a and 2b are measured, and the change in the total flow rate is analyzed by the algorithm of the flow rate calculation unit 4 to determine the gas appliance to be used.

[0004]

However, in the above-mentioned conventional method, the appliance is determined using a normal flow rate measurement signal, and since it is a passive detection method, a transient flow rate is detected at a required time interval. I ca n’t catch the change,
There is a problem that the discrimination ability is low.

[0005]

According to the present invention, in order to solve the above-mentioned problems, a control section is provided in a flow rate measuring section, and a transient flow rate change is detected by an instrument use start signal.

[0006] According to the above invention, when the use of the appliance is started, the rise state of the flow rate specific to the appliance can be detected, and the appliance to be used can be determined with high accuracy.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a fluid piping system for supplying fluid from a single supply channel to a plurality of devices, a flow rate measuring device arranged in the supply channel is provided. And a control unit of the flow rate measuring unit, and a determining unit that specifies a tool to be used based on a signal from the flow rate measuring unit. And since the control of the flow rate measurement unit is performed by the signal of the detection unit, the used equipment can be specified.

[0008] According to a second aspect of the present invention, there is provided an apparatus for discriminating a device to be used, wherein in a fluid piping system for supplying a fluid to a plurality of instruments from one supply channel, an ultrasonic flow rate measuring unit disposed in the supply channel. And a controller for controlling the use of the appliance, a controller for the flow measuring unit, and a determining unit for specifying the appliance to be used based on a signal from the flow measuring unit. And, in order to control the ultrasonic flow rate measurement unit by the signal of the detection unit,
The use equipment can be specified.

According to a third aspect of the present invention, in a fluid piping system for supplying a fluid to a plurality of appliances from a single supply channel, a flow rate measuring unit disposed in the supply channel; It has a physical quantity detection unit for starting use of the appliance, a control unit for the flow measurement unit, and a determination unit for specifying the appliance to be used based on a signal from the flow measurement unit. And, in order to control the flow rate measurement unit by the signal of the physical quantity detection unit,
The use equipment can be specified.

According to a fourth aspect of the present invention, there is provided a used appliance discriminating system, wherein in a fluid piping system for supplying a fluid to a plurality of appliances from a single supply passage, a flow measuring unit disposed in the supply passage; The apparatus includes a flow detection unit for starting use of the appliance, a control unit of the flow measurement unit, and a determination unit for specifying an appliance to be used based on a signal from the flow measurement unit. Since the flow rate measuring unit is controlled by the signal of the flow rate detecting unit, the used equipment can be specified.

According to a fifth aspect of the present invention, in a fluid piping system for supplying a fluid to a plurality of appliances from one supply channel, a flow rate measuring unit disposed in the supply channel is provided. It has a detection unit for detecting the start of use of the appliance, a control unit for increasing the measurement frequency of the flow measurement unit, and a determination unit for specifying the appliance to be used based on a signal from the flow measurement unit.
Then, since the measurement frequency of the flow rate measurement unit is increased by the signal of the detection unit, it is possible to specify the equipment to be used.

According to a sixth aspect of the present invention, there is provided a used appliance discriminating system, comprising: a fluid piping system for supplying a plurality of appliances with a fluid from one supply passage; A detection unit for detecting the start of use of the appliance, a control unit for reducing the number of sing-arounds of the flow measurement unit, and a determination unit for specifying an appliance to be used based on a signal from the flow measurement unit. Then, the number of sing-arounds of the flow rate measurement unit is reduced by the signal of the detection unit to substantially increase the number of times of measurement, so that it is possible to specify the equipment to be used.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing the configuration of a used appliance discriminating system in Embodiment 1 of the present invention, FIG. 2 is a block diagram of a flow rate measuring section of the system, and FIG. 3 is a judging section of the system. It is a flowchart of FIG.

1 to 3, reference numeral 6 denotes a flow rate measuring unit;
Is an appliance use start signal detection unit, 8 is a control unit, 9 is a judgment unit,
10 is an instrument.

11 is a flow path, 12 is a first ultrasonic vibrator,
13 is a second ultrasonic vibrator. 14 is a transmitter, 15
Is a receiving unit, and 16 is a switching unit. Reference numeral 17 denotes a signal processing unit, which includes a clock unit 18 and a flow rate calculation unit 19. Reference numeral 20 denotes a switching control unit.

21 is a start command, 22 is a flow rate measurement command, 2
3 is a flow rate change judgment command, 24 is an interval setting command, 2
5 is a measurement frequency increase instruction, 26 is a rising waveform creation instruction, 2
7 is an instrument pattern comparison / determination command, 28 is an interval setting command, 29 is an instrument specifying command, and 30 is a condition setting command.

Next, the operation and operation will be described. First,
It shows about normal flow measurement. In this case, the switching unit 16 is initially connected with B to C and A to D. That is, the signal emitted from the transmitting unit 14 is transmitted from the first vibrator 12 via the switching unit 16 and reaches the second vibrator 13 via 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 transmitting section 14 also enters the timer section 18 at the same time, and the signal received by the receiving section 15 also enters the timer section 18. The time difference between these signals is measured by the timer section 18, and the elapsed time (T1) is obtained.

Next, the switching unit 16 sets A to C and B to D
Connected to. As a result, an elapsed time (T2) that is transmitted from the second vibrator 13 and crosses the flow path 11 to reach the first vibrator 12 is obtained.

Based on the elapsed times T1 and T2 measured in this way, the flow rate is calculated by the flow rate calculating section 19 by the following equation.

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

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

In order to increase the accuracy of measurement by such a method, a method called sing-around in which transmission and reception are repeated many times may be adopted. In this case, the average value is used for T1 and T2.

Now, when a certain instrument is used, the detecting unit 7
Captures that signal. This signal itself is not a physical quantity that can specify the appliance, but is a signal that the appliance has just started to be used. That is, the flow rate is increased in the flow rate calculation unit 19. 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 measurement 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 judging unit 9.

In FIG. 3, a program is started by a start instruction 21. The normal flow measurement described above is performed by the flow measurement command 22. Here, when any one of the appliances 10 is used, a flow rate change occurs, which is determined to be Yes by the flow rate change determination command 23. If the device 10 is not in the rising state, it becomes No and the interval setting command 24
After the time set in, the same operation is repeated again.

When a change in the flow rate is detected, the switching control section 20 starts high-speed sampling in response to the measurement frequency increase command 25. Based on the detailed data thus obtained, a rising waveform of the flow rate is formed by the rising waveform creation command 26. This is compared with a pre-registered rising pattern by a tool pattern comparison / judgment command 27, and if there is a match, a tool to be used is specified by a tool specifying command 30. Thereafter, the safety condition for the appliance specified by the condition setting instruction 30 is given. If they do not match, it is due to another factor.
, And after the time set by the interval setting instruction 28, the above contents are repeated again.

As described above, by performing high-speed measurement at the start of use of the instrument, the instrument can be specified with high accuracy.

(Embodiment 2) FIG. 4 is a flowchart for discriminating the used appliance discriminating system in Embodiment 2 of the present invention.

The second embodiment is different from the first embodiment in that the object of the detection unit is a physical quantity, and the physical quantity change determination instruction 31
Is the point that has been replaced. In this case, the physical quantity
There are sound waves, ultrasonic waves, pressure, and the like generated when the use of the device is started.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted. Next, an operation and an operation will be described. If there is a physical quantity change associated with the start of use of the appliance after the flow rate measurement command 22, a physical quantity change determination command 31 is performed, and then a measurement frequency increase command 25 is performed. The following operation is the same as in the first embodiment.

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

The third embodiment is different from the first embodiment in that the measurement frequency increasing instruction 25 is replaced with a single-around number reduction instruction 32.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted. Next, an operation and an operation will be described. After the flow rate measurement command 22, if 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 operation is the same as in the first embodiment.

[0035]

As described above, the system for discriminating the used appliance according to the first aspect of the present invention controls the flow rate measurement based on the appliance use start signal, so that it is possible to accurately grasp the start-up state of the appliance. There is an effect that the accuracy of discrimination can be improved.

Further, in the appliance determination system according to the second aspect, since the ultrasonic flowmeter is used for the flow rate measurement, an instantaneous value of the flow rate can be obtained, and there is an effect that the determination accuracy of the appliance can be improved.

Further, since the used appliance discrimination system according to the third aspect uses a physical quantity as the appliance use start signal, it is possible to accurately capture the start signal and improve the discrimination accuracy of the appliance.

Further, the used appliance discriminating system according to the fourth aspect uses the flow rate as the appliance use start signal, so that the signal of the flow rate measuring unit can be shared, and there is an effect that a more efficient system can be constructed.

Further, in the appliance determination system according to the fifth aspect, since the control unit increases the measurement frequency, there is an effect that the identification accuracy of the appliance can be improved.

Further, in the appliance determination system according to the sixth aspect, since the control unit reduces the number of sing-arounds, a large amount of flow data can be obtained in a short time, and the accuracy of appliance identification can be improved. effective.

[Brief description of the drawings]

FIG. 1 is a block diagram of a used appliance determination system according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a flow measurement part of the system.

FIG. 3 is a flowchart of a determination unit of the system.

FIG. 4 is a flowchart of a determination unit of a used appliance determination system according to a second embodiment of the present invention.

FIG. 5 is a flowchart of a determination unit of a used appliance determination system according to a third embodiment of the present invention.

FIG. 6 is a block diagram of a conventional used appliance discrimination system.

[Explanation of symbols]

 5 supply flow path 6 flow rate measurement section 7 detection section 8 control section 9 judgment section

Claims (6)

[Claims] In a fluid piping system for supplying a fluid to a plurality of appliances from one supply passage, a flow measurement unit disposed in the supply passage, the appliance use start detection unit, and a flow measurement unit. A used appliance discriminating system comprising a control unit and a determining unit for identifying an appliance to be used based on a signal from the flow rate measuring unit. 2. The used appliance discriminating system according to claim 1, wherein the flow rate measuring unit comprises an ultrasonic flow meter. 3. The used appliance discrimination system according to claim 1, wherein the used appliance start detecting unit uses a signal of a physical quantity. 4. The used appliance discriminating system according to claim 1, wherein the used appliance start detecting unit uses a flow signal of the flow measuring unit. 5. The used appliance discriminating system according to claim 1, wherein the control unit increases the frequency of measurement. 6. The used appliance discriminating system according to claim 2, wherein the control section reduces the number of sing-arounds.