KR101888188B1 - Ultrasonic water meter with freeze protection function, leak detecting system including the ultrasonic water meter and leaking point edtecting method usinf the system - Google Patents

Abstract

The present invention can accurately and accurately calculate the flow rate by ultrasonic wave transmission and reception of a pair of ultrasonic sensor modules spaced apart from each other on the flow channel, and can also quickly and accurately display the leakage of tap water by the leak sound sensor on the flow channel And to a leakage detection system using the water meter.
The present invention provides an ultrasonic water meter capable of detecting water leakage, comprising: a flow channel coupled to a water pipe to flow tap water into the water channel; an ultrasound wave transmitter unit coupled to the flow channel in a longitudinal direction, An ultrasonic reflector provided in the flow channel and facing each other in an inclined state at a lower side of the ultrasonic sensor module; and an ultrasonic transducer coupled to the ultrasonic wave sensor module, And a leakage current sensor provided on the flow channel and detecting whether the water pipe is leaking or not. The meter body includes a flow rate calculation display unit for calculating and displaying a flow rate based on the signal of the ultrasonic sensor module, . Also, the leakage detection system according to the present invention may include: an ultrasonic water meter capable of detecting the leakage which is arranged on a plurality of water pipes; and a leakage sound detection signal provided from a leakage sound sensor of the ultrasonic water meter capable of detecting the leakage, A reception unit for receiving a signal provided from the transmission unit, a flow rate sensing data receiving unit for receiving the flow rate sensing data from the ultrasonic water meter capable of sensing the leakage, analyzing the flow rate change, and analyzing the leakage sound sensing signal provided through the reception unit And a communication unit for transmitting leakage information according to a result of the determination by the controller to the integrated management server. According to another aspect of the present invention, there is provided a method for detecting a leakage position, comprising the steps of: receiving a leakage signal from a leakage sensor of an ultrasonic water meter capable of detecting the leakage; A second step of determining whether a leaked water detection signal is received together with a leaked water detection signal, a third step of determining that the leaked water detection signal and the leaked water detection signal are received at the same time, And a fourth step of judging the leakage to the outside if it is not detected.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic water meter capable of detecting water leakage, a water leakage detection system having the water leakage meter, and a leakage position detection method using the water leakage meter. 2. Description of the Related Art Ultrasonic water meter,

The present invention relates to an ultrasonic water meter, more particularly, to an ultrasonic water meter capable of sensing water leakage, a water leakage detection system having the same, and a water leakage position detection method using the same.

Generally, in the case of sound waves, the speed of propagation in the direction of flow of the fluid is faster than the speed of propagation in the direction of flow of the fluid.

Accordingly, a pair of ultrasonic sensor modules, which are spaced apart from each other by a predetermined distance in the fluid flow direction, oscillate the ultrasonic waves to propagate the ultrasonic wave propagating in the direction of the measured fluid and the propagation velocity of the ultrasonic wave propagating in the direction opposite to the fluid flow By comparing the car, the velocity of the fluid can be calculated. In particular, the flow rate of the fluid can be calculated by multiplying the cross-sectional area of the channel through which the fluid flows and the fluid velocity.

The ultrasonic water meter measures the flow rate of tap water using the above-mentioned principle. As an example of such an ultrasonic water meter, Korean Patent Laid-Open Publication No. 10-2013-0100564 (published on Sep. 11, 2013) At least one ultrasonic sensor installed in the flow rate measuring tube and capable of transmitting and receiving ultrasonic waves, and at least one ultrasonic sensor electrically connected to the ultrasonic sensor, And a controller for calculating a flow rate of the fluid flowing through the pipe using the transmitted signal.

Also, Korean Patent Laid-Open Publication No. 10-2013-0100563 (published on Sep. 11, 2013) discloses a measuring tube which is formed in a hollow shape and which is installed to be inserted into a channel through which a fluid flows, And a second ultrasonic vibrator which is provided so as to be spaced apart from the first ultrasonic vibrator along the flow direction of the fluid and which transmits and receives ultrasonic waves between the first ultrasonic vibrator and the first ultrasonic vibrator, And a controller electrically connected to the first ultrasonic transducer and the second ultrasonic transducer to calculate a flow rate of the fluid flowing through the conduit using signals transmitted from the first ultrasonic transducer and the second ultrasonic transducer, The flow path inside the measuring tube through which the fluid flows has a polygonal shape, and the first ultrasonic vibrator and the second ultrasonic vibrator The ultrasonic waves emitted from the vibrator are reflected by the inner wall surface of the measuring tube and then received by the second ultrasonic transducer and the first ultrasonic transducer, respectively, and the measuring tube is mounted with the first ultrasonic transducer and the second ultrasonic transducer And a reflecting surface that is disposed in parallel with the mounting surface so as to reflect the ultrasonic waves emitted from the first ultrasonic vibrator and the second ultrasonic vibrator and faces the mounting surface, Wherein an uneven portion is formed in a full-bodied concave shape.

In addition, in Korean Patent Registration No. 10-1576771 (Oct. 10, 2015), tap water flows into the inside of a water pipe to form a shaft-diameter portion at its center, large-diameter portions are formed on both sides of the shaft- A pair of ultrasonic transducers provided in the flow channel, the pair of ultrasonic transducers being tightly fitted in the coupling holes of the flow channels and having a piezoelectric ceramic for transmitting and receiving ultrasonic waves, And elastic means for elastically deflecting the ultrasonic transducer in a downward direction and elastically accommodating changes in volume which are increased during freezing of tap water, respectively, Respectively, and the inner side thereof is fitted into the large-diameter part of the flow channel, There is disclosed an ultrasonic water meter capable of detecting leakage with a flow channel including a pair of primary straightners provided with ultrasonic reflectors facing each other in an inclined state.

However, since the conventional ultrasonic water meter merely fulfills the function of a conventional water meter for calculating and displaying the flow rate of the fluid flowing through the duct, it is only possible to infer the calculated flow rate against the time zone in which tap water is not used However, there is a problem that the leakage can not be accurately displayed.

On the other hand, about civil affairs related to waterworks, about 14.8% of civil complaints are related to leakage. As a result, the user is inconvenienced and the economic loss is very large. Therefore, the solution to the water leakage problem of the water supply pipe is becoming one of maintenance measures for stable water supply operation.

In general households and densely populated areas, small cisterns are connected to large cisterns beneath the road to supply tap water to the final destination. At this time, when a small pipe is referred to as a "branch," most leaks occur in the branch line. In other words, the branch wire has a large pressure due to a small tube, and in a dense housing area, it is connected by a joint or the like so that leakage is easily generated at the joint and the connection part.

It is known that about 20% or more of tap water as a whole is wasted due to leaking water when the leakage amount generated from each branch line is counted as a whole. As a result of such a large amount of tap water leaking, foreign substances, bacteria, heavy metals, etc. are introduced into the water pipe due to a change in pressure at the water leakage position as well as a waste of cost.

Therefore, it is necessary to replace or repair old or damaged water pipes by correctly grasping the leakage position. Conventional leakage detection technology has a limitation in detecting a small amount of water leakage, and it is not easy to accurately detect a branch line connected to each home have.

As a technique for solving such a problem, Korean Patent Registration No. 10-1250955 (2013. 3.29) discloses a sound detection sensor installed in a water pipe and sensing sound of water transmitted through the water pipe, And a control unit for analyzing the information detected by the sound detection sensor to check whether or not the water supply pipe is leaked and outputting the result of the check through the output unit, The detection sensor includes a housing formed at least partly of a metal material and having an empty space in which the control unit is installed, and a connection member connected to the water pipe of the housing and connected to the water pipe, A sound transmission member for transmitting a sound to be transmitted to the inside of the housing; Shake plate clenched by the sound delivered to the housing through and; And a sound collecting unit installed in the housing for collecting the vibrating sound of the vibration plate and transmitting the collected vibration to the control unit.

However, in the case of the conventional tap water leakage detecting device, the sound transmitting member, the vibration plate, the vibration plate supporting protrusion and the sound collecting unit must be included in order to detect the leakage sound. There is a problem that an error may occur in the sensing value due to expansion and contraction.

[Prior Art Literature]

1. Korean Patent Publication No. 10-2013-0100564 (published on September 11, 2013)

2. Korean Patent Publication No. 10-2013-0100563 (published on September 11, 2013)

3. Korean Patent Registration No. 10-1576771 (Announcement of Dec. 10, 2015)

4. Korea Patent Registration No. 10-1250955 (2013. 3.29)

The present invention has been conceived to overcome the above-described problems of the conventional art, and it is an object of the present invention to provide an ultrasonic diagnostic apparatus and a ultrasonic diagnostic apparatus which are capable of accurately calculating and displaying a flow rate by ultrasonic wave transmission and reception of a pair of ultrasonic sensor modules, The present invention is based on the object of providing an ultrasonic water meter capable of detecting leakage of tap water so that the leakage of tap water can be promptly and accurately displayed by the ground sensor.

Another object of the present invention is to provide a leak detection system and a leakage position detection method using the leakage detection system that can quickly and accurately determine the leakage position using an ultrasonic water meter capable of detecting leakage.

The object of the present invention is to provide an ultrasonic transducer which is coupled to a water pipe and through which tap water flows, and an ultrasonic transducer which is coupled to the flow channel in a longitudinal direction and transmits and receives ultrasonic waves, A pair of ultrasonic sensor modules, an ultrasonic reflector provided in the flow channel and facing each other in an inclined state on the lower side of the ultrasonic sensor module, and an ultrasonic wave sensor coupled to the flow channel and connected to the ultrasonic sensor module, A meter main body having a flow rate calculation display section for calculating and displaying a flow rate based on a signal of the sensor module, and a leakage sound sensor provided on the flow channel for detecting leakage of the water pipe, Water meter. ≪ / RTI >

According to a preferred aspect of the present invention, the leak sound sensor is installed inside the meter main body and is disposed in contact with the outer circumferential surface of the flow channel.

According to a preferred aspect of the present invention, the leak sound sensor is installed inside the meter main body and inserted into the flow channel.

According to a preferred aspect of the present invention, the leak sound sensor is installed outside the meter main body and is disposed in contact with the outer circumferential surface of the flow channel.

According to a preferred aspect of the present invention, the ultrasonic sensor module includes a sensor housing coupled to the flow channel, and an ultrasonic transducer provided at an inner bottom of the sensor housing to transmit and receive ultrasonic waves.

According to a preferred aspect of the present invention, the leak sound sensor is formed of an acoustic sensor or a vibration sensor.

According to a preferred aspect of the present invention, the leak sound sensor may be wired to the flow rate calculation display unit of the meter main body to provide a sensor signal for detecting leakage or leakage to the flow rate calculation display unit, Gt; a < / RTI > wireless transmitter.

The present invention also relates to an ultrasonic water meter capable of detecting the leakage, which is arranged on the water line, and a water leakage detection signal provided from the water leakage sensor of the ultrasonic water meter capable of detecting the water leakage, A reception unit for receiving a signal provided from the transmission unit, a flow rate sensing data receiving unit for receiving the flow rate sensing data from the ultrasonic water meter capable of sensing the leakage, analyzing the flow rate change, and analyzing the leakage sound sensing signal provided through the reception unit And a leak detector for detecting a leak and a leakage position of the leakage water, and a communication unit for transmitting leakage information according to the determination result of the controller to the integrated management server.

According to a preferred aspect of the present invention, the controller determines the leakage position using the distance between the ultrasonic water meters capable of sensing the leakage, the propagation speed of the leakage signal, and the leakage signal propagation time difference to the ultrasonic water meter do.

According to another aspect of the present invention, there is provided a method of detecting leakage of water from a leak sound sensor, comprising the steps of: receiving a leak sound detection signal from a leak sound sensor of a ultrasonic water meter capable of detecting a leak; and receiving the leak signal from an ultrasonic water meter A third step of judging whether a leakage water detection signal and a leakage water detection signal are received at the same time, a second step of determining whether a leakage water detection signal is received together with a leakage water detection signal, And a fourth step of determining that the leaked water is leaked when the leaked water is not leaked.

According to the ultrasonic water meter capable of sensing the leakage of water according to the present invention, not only the flow rate is accurately calculated and displayed by the ultrasonic wave sending and receiving of a pair of ultrasonic sensor modules spaced apart from each other on the flow channel, It is also advantageous that the leakage of tap water can be detected quickly and accurately by the ground sensor.

Further, according to the leakage detection system and the leakage position detection method of the present invention,

Using the remote meter reading system and leak detection device,

I can judge it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an ultrasonic water meter according to an embodiment of the present invention. FIG.
FIG. 2 is a cross-sectional structural view of an ultrasonic water meter capable of detecting water leakage according to another embodiment of the present invention. FIG.
3 is a cross-sectional structural view of an ultrasonic water meter capable of detecting leakage according to another embodiment of the present invention.
FIG. 4 is a block diagram of a leakage detection system having an ultrasonic water meter capable of detecting leakage according to the present invention. FIG.
5 is an exemplary view showing the principle of leaking position estimation using the propagation time difference of a leakage signal.
6 is an exemplary process flow diagram of a leakage location sensing method in accordance with the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to illustrate the present invention in a manner that allows a person skilled in the art to easily carry out the invention, And this does not mean that the technical idea and scope of the present invention are limited.

FIG. 1 is a cross-sectional structural view of an ultrasonic water meter capable of detecting water leakage according to an embodiment of the present invention, FIG. 2 is a sectional view of an ultrasonic water meter capable of detecting water leakage according to another embodiment of the present invention, 3 is a cross-sectional structural view of an ultrasonic water meter capable of detecting leakage according to another embodiment of the present invention.

1 to 3, the ultrasonic water meter (1, 1 ', 1 ") according to the present invention is capable of detecting water leakage. The ultrasonic water meter 1 is connected to a water pipe 3, A pair of ultrasonic sensor modules 20 which are spaced from each other along the longitudinal direction of the flow channel 10 and are provided with an ultrasonic transducer 23 for transmitting and receiving ultrasonic waves, An ultrasonic reflector 30 provided in the ultrasonic sensor module 20 and facing the ultrasonic sensor module 20 in an inclined state under the ultrasonic sensor module 20; an ultrasonic sensor 30 coupled to the flow channel 10 and connected to the ultrasonic sensor module 20, A meter main body 40 provided with a flow rate calculation display section 41 for calculating and displaying the flow rate based on the signal of the module 20 and a meter main body 40 provided on the flow channel 10 for detecting whether the water pipe 3 is leaked And a leaking sound sensor 50 for detecting the sound leakage.

Here, the flow channel 10 forms a channel through which tap water flows, and at the same time forms a channel through which ultrasonic waves propagate in the direction opposite to the flow direction of the tap water. In order to allow the tap water to be measured to pass therethrough, . The flow channel 10 is preferably made of an engineering synthetic resin material such as brass castings, stainless steel castings, for example, polyphenylene sulfide (PPS) resin.

Although the flow channel 10 is shown as a general tubular shape, the ultrasonic sensor module (hereinafter, referred to as " ultrasonic sensor module ") will be described later on both sides of the shaft portion that forms the measurement space so that the flow rate of the tap water and the flow rate thereof can be measured by the actual ultrasonic waves 20 and the large-diameter portion on which the ultrasonic wave reflector 30 is provided are respectively formed.

The reason why the flow velocity of the tap water and the flow rate thereof are measured is that the flow rate is relatively small in the constricted portion having a relatively small inner diameter because the problem of lowering the accuracy, which occurs when a small amount of tap water flows into the flow channel 10 at a low speed, This is to measure the flow rate of the tap water and the flow rate of the tap water more accurately by increasing the flow rate of the tap water at the relevant site.

In the above-described flow channel 10, a pair of ultrasonic sensor modules 20 are installed spaced apart in the longitudinal direction of the flow channel 10.

The ultrasonic sensor module 20 transmits ultrasonic waves in the downward direction and receives the ultrasonic waves in the upward direction and transmits the signals. The ultrasonic sensor module 20 is preferably watertightly coupled to the flow channel 10 with interposition of a packing or the like.

The ultrasonic sensor module 20 includes a sensor housing 21 coupled to the flow channel 10 and an ultrasonic transducer 23 provided at an inner lower end of the sensor housing 21 to receive and receive ultrasonic waves.

The sensor housing 21 is preferably made of a polymeric material.

The ultrasonic transducer 23 is formed of a piezoelectric ceramic structure in which an oscillation unit for converting an electric signal into an ultrasonic wave and a receiving unit for receiving the ultrasonic wave and converting the ultrasonic wave into an electric signal are integrally combined. As is well known, a detailed description will be omitted here for the sake of simplicity.

The ultrasonic transducer 23 of the ultrasonic sensor module 20 is connected to the flow rate calculation display section 41 of the meter body 40 to be described later to transmit an ultrasonic reception signal for calculating the flow rate and the flow rate to the flow rate calculation display section 41 to provide.

In the sensor housing 21, a backing member is laminated on the ultrasonic transducer 23, which serves to prevent vibration in the lateral direction, and is mainly made of a metal material.

In the flow channel 10 described above, the ultrasonic wave reflector 30 is installed so as to face the ultrasonic wave sensor module 20 in an inclined state below the ultrasonic wave sensor module 20.

The ultrasonic reflector 30 may be disposed at an angle of 45 degrees to be opposed to each other. In this case, the ultrasonic wave is propagated from any ultrasonic transducer 23 positioned directly above the ultrasonic reflector 301 The ultrasonic waves are bent at an angle of 90 degrees, propagated in the flow direction of the tap water and the opposite direction thereof, then bent again at an angle of 90 degrees so as to be propagated to the other ultrasonic transducer 23.

It is preferable that the ultrasonic reflector 30 is integrally formed with a strainer for alleviating a vortex generated in the flow of tap water and is provided in a form and structure that does not disturb the flow of tap water as much as possible.

The meter channel body 40 is coupled to the flow channel 10 described above. The meter main body 40 receives a signal from the ultrasonic sensor module 20 to calculate a flow rate and display the flow rate, and at the same time forms a heat insulating space around the flow channel 10.

The meter main body 40 is provided therein with a flow rate calculation display unit 41 connected to the ultrasonic sensor module 20 and calculating and displaying the flow rate based on the signals of the ultrasonic sensor module 20. [ The flow rate calculation display section 41 calculates the flow rate of the tap water from the difference in the bidirectional propagation velocity measured by the ultrasonic sensor module 20 and calculates the flow rate by multiplying the flow velocity by the cross sectional area of the flow channel 10 A display means (not shown) for displaying a flow rate value of tap water calculated from the circuit board, a battery (not shown) for supplying power to the circuit board and the display means, or the ultrasonic transducer 23 Not shown).

On the upper side of the meter main body 40, an opening / closing cover 43 for exposing the upper display window of the flow rate calculation display part 41 for meter reading is provided so as to be rotatable on the hinge axis.

In addition, the meter body 40 can be filled with a heat insulating material of various materials. A foaming agent such as styrofoam may be applied to the heat insulating material, but it is particularly preferable that a urethane foam having excellent warmth is applied.

On the flow channel 10, a leak sound sensor 50 for detecting the leak of the water pipe 3 is installed. The leaking sound sensitivity sensor 50 senses sound or vibration generated when the tap water flows along the water pipe 3 in real time and detects the leakage through the detection of the passage of time. An acoustic sensor or a conventional vibration sensor.

As shown in FIG. 1, the leakage sensor 50 may be installed inside the meter main body 40 and simply contact the outer circumferential surface of the flow channel 10, and as shown in FIG. 2, And may be installed inside the meter main body 40 and may be watertightly inserted into the flow channel 10 and may be installed outside the meter main body 40 as shown in FIG. And may be installed outside the meter body 40 but may be installed to be watertightly inserted into the flow channel 10, though not shown.

The leak sound sensor 50 includes a sensor housing coupled to the flow channel 10 and a piezoelectric ceramic provided at an inner lower end of the sensor housing 21 to convert electrical signals or vibrations received.

Generally, a leaking signal (leakage signal) occurs over a wide frequency band when leakage occurs in a water pipe buried underground. Leakage signals are used to detect water leaks in the water pipe due to a strong leak of water out of the low pressure pipe inside the high pressure pipe, resulting in a pressure drop. This leakage signal can be distinguished clearly because it generates a leak signal continuously when leakage occurs, unlike a temporary noise. Depending on the magnitude of the sudden pressure drop at the leak point, the shape and size of the leak hole, the magnitude of the leak signal can vary.

The water flow in the water pipe with the water pressure in the water pipe emits sound in the low frequency range, and the range of frequencies generated by the leak generally emits sounds (100-250 Hz) in the low frequency band.

When a leak occurs in a water pipe, water flowing inside the pipe is pushed out by the water pressure and generates a continuous leak signal due to irregular vibration. The leakage signal propagates in both directions through the wall of the water pipe from the leaked water area, and finally reaches the leaked sound field sensor 50, and the leaked sound corresponding to the vibration of the piezoelectric ceramic is outputted by the leaked sound.

The leak sound sensor 50 may be connected to the flow rate display portion 41 of the meter main body 40 by a wired cable to provide a sensor signal for detecting leakage to the flow rate display portion 41. In this case, it is preferable that the flow rate calculation display section 41 includes a radio transmitter for wirelessly transmitting a detection signal from the leak sound field sensor 50 to an external manager terminal (not shown).

The leak sound sensor 50 is not connected to the flow rate calculation display unit 41 of the meter main body 40 but includes a wireless transmitter (not shown) RTI ID = 0.0 > time). ≪ / RTI >

In the case of an ultrasonic water meter (1, 1 ', 1 ") capable of detecting water leakage according to an embodiment of the present invention as described above, a pair of water- The difference between the propagation speed of the ultrasonic wave propagating in the flow direction of the tap water measured by oscillating the ultrasonic wave from the ultrasonic sensor module 20 of the ultrasonic sensor module 20 and the propagation speed of the ultrasonic wave propagating in the direction opposite to the flow direction of the tap water, ), The flow velocity of the tap water and the flow rate thereof can be quickly and accurately calculated and displayed.

In the case of the ultrasonic water meter (1, 1 ', 1 ") capable of detecting the leakage according to the embodiment of the present invention as described above, the leak sound sensor (50) provided on the flow channel It is possible to quickly and accurately indicate whether tap water is leaked or to be quickly and accurately recognized by the administrator through the administrator terminal.

FIG. 4 is a block diagram of a leakage detection system having an ultrasonic water meter capable of detecting leakage according to the present invention.

As shown in FIG. 4, the leakage detection system according to the present invention includes an ultrasonic water meter (1, 1 ', 1 ") capable of detecting a number of water leakages arranged on a water line and an ultrasonic water meter (110) for remotely transmitting a leak sound detection signal provided from the leak sound sensor (50) of the portable terminal (1, 1 ', 1 "), a receiver (120) for receiving a signal provided from the transmitter (110) The flow rate sensing data is received from an ultrasonic water meter (1, 1 ', 1 ") capable of detecting a leak, analyzed for a change in flow rate, and analyzed for leak sound detection signal provided through the receiver And a communication unit 140 for transmitting the leak information according to the determination result of the controller 130 to the integrated management server 150. [

The control unit 140 collects the flow rate sensing data and the like from the ultrasonic water meter 1, 1 ', 1 "capable of detecting the water leakage sound signal and the water leakage sensing signal provided through the reception unit 120 to derive the water leakage amount and the amount of water leakage in the corresponding interval can do.

The leakage position estimation in the control unit 140 can be estimated by knowing the distance between the leak sound detecting sensors 50, the propagation speed of the leak signal, and the propagation time difference of the leak signal to each leak sound detecting sensor 50

FIG. 5 shows an exemplary diagram showing the principle of leaking position estimation using the propagation time difference of the leakage signal. Where D is the distance m between the leak sensor 1 and the sensor 2 and d1 is the distance between the leak sensor 1 and the leak point (M), d2 is the distance (m) between the water leakage sensor 2 and the water leakage point, C is the propagation velocity (m / s) of the water leakage signal in the pipe, (S) of the leakage signal.

The time taken for the leak signal to propagate to each leak sound field sensor 50 at the leak point can be expressed as d1 / C, d2 / C. Based on this, the propagation time difference? T of the leak signal can be expressed as shown in Equation do.

[Equation 1]

If d1 = d1 + d2, the distance d1 = d1 + d2 between sensor 1 and sensor 2 is expressed as d2 = D - d1. If d2 = d - d1 is substituted for d2 = d1 +? tC, it is expressed by the following equation (2).

&Quot; (2) "

d1 +? tC = D - d1

Further, the distance d1 from the leakage point to the leak sound sensor 1 is expressed by Equation (3).

&Quot; (3) "

d1 = 1/2 (D -? tC)

Further, the distance d2 from the leakage point to the leak sound sensor 2 is expressed by Equation (4).

&Quot; (4) "

d2 =? (D +? tC)

As a result, it is possible to estimate the leak point by estimating the propagation speed of the leak signal in the pipe and the time difference (propagation time difference) of the leak signal reaching the leak sound field sensor 50 provided at both sides of the leak point.

Figure 6 shows an exemplary process flow diagram of a leakage location sensing method in accordance with the present invention.

6, the leakage position sensing method according to the present invention is a method for sensing a leak sound from a leak sound sensor 50 of an ultrasonic water meter 1, 1 ', 1 " A second step S2 of judging whether a water leakage detection signal provided from an ultrasonic water meter 1, 1 ', 1 "capable of detecting water leakage installed in the domestic water supply pipe is received together, A third step (S3) of judging that the leakage signal is detected at the same time, and a fourth step (S4) when it is determined that the leak signal is only sensed and the leakage signal is not detected .

In the leakage position sensing method according to the present invention, when a leak sound detection signal is received from the leak sound sensor 50 of the ultrasonic water meter 1, 1 ', 1 "capable of detecting leakage, If it is determined that the leakage water detection signal provided by the known remote meter reading system is simultaneously received from the possible ultrasonic water meters 1, 1 ', 1 ", the leakage water detection signal and the leakage water detection signal are simultaneously received, And only the leakage sound detection signal is detected, and when the leakage water detection signal is not detected, it is judged as the leakage outside.

It is to be understood by those skilled in the art that the present invention may be embodied in many other forms without departing from the spirit and scope of the invention, It is therefore intended that the above-described embodiments be considered as illustrative rather than restrictive, and that all implementations within the scope of the appended claims and their equivalents are intended to be included within the scope of the present invention.

1, 1 ', 1 ": Ultrasonic water meter capable of leak detection
10: Flow channel
20: Ultrasonic sensor module
21: Sensor housing
23: Ultrasonic transducer
30: Ultrasonic reflector
40: meter body
41: Flow rate calculation display section
43: opening / closing cover
50: Leakage sensor
100: Leak detection system
110:
120: Receiver
130:
140:
150: Integrated management server

Claims (10)

A flow channel (10) coupled to the water pipe (3) through which the tap water flows;
A pair of ultrasonic sensor modules 20 spaced from each other along the longitudinal direction of the flow channel 10 and having an ultrasonic transducer 23 for transmitting and receiving ultrasonic waves;
An ultrasonic reflector (30) installed in the flow channel (10) and facing each other in an inclined state from below the ultrasonic sensor module (20);
And a flow rate calculation display unit 41 which is connected to the flow channel 10 and is connected to the ultrasonic sensor module 20 and calculates and displays a flow rate based on a signal of the ultrasonic sensor module 20, A body 40; And
And a leak sound sensor (50) installed on the flow channel (10) for detecting whether the water pipe (3) is leaked,
The leak sound sensor 50 is installed inside the meter main body 40 and is watertightly inserted into the flow channel 10,
The leaking sound field sensor 50 is connected to the flow rate display part 41 of the meter main body 40 to provide a sensor signal for detecting leakage to the flow rate display part 41, Further comprising a wireless transmitter for wireless transmission to the ultrasonic water meter.
delete delete delete The method according to claim 1,
The ultrasonic sensor module 20 includes a sensor housing 21 coupled to the flow channel 10 and an ultrasonic transducer 23 disposed at an inner lower end of the sensor housing 21 for transmitting and receiving ultrasonic waves Wherein the water meter is a water meter.
The method according to claim 1,
Wherein the leak sound sensor (50) is formed of an acoustic sensor or a vibration sensor.
delete An ultrasonic water meter (1 ') capable of detecting a leak according to any one of claims 1, 5 and 6, which is arranged on a plurality of water lines.
A transmitter 110 for remotely transmitting a leak sound detection signal provided from the leak sound sensor 50 of the ultrasonic water meter 1 'capable of detecting the leak;
A receiving unit 120 receiving a signal provided from the transmitting unit 110;
A controller for analyzing a change in the flow rate by receiving the flow rate sensing data from the ultrasonic water meter 1 'capable of sensing the leakage and analyzing the leakage sound sensing signal provided through the receiver 120, (130); And
And a communication unit (140) for transmitting leakage information according to the determination result of the controller (130) to the integrated management server (150).
The method of claim 8,
The control unit 130 determines the leakage position using the difference between the ultrasonic water meters 1 'capable of detecting the leakage, the propagation speed of the leakage signal, and the leak signal propagation time difference to each leak sound field sensor 50 Features leak detection system.
A first step (S1) of receiving a leak sound detection signal from a leak sound sensor (50) of an ultrasonic water meter (1 ') capable of detecting a leak according to any one of claims 1, 5 and 6;
A second step (S2) of judging whether or not a leakage water detection signal provided from an ultrasonic water meter (1 ') capable of detecting a leak according to any one of claims 1, 5, and 6 installed in a domestic water supply pipe is received together, ;
A third step (S3) of judging that the leak sound detection signal and the leak water amount detection signal are received at the same time in the house leakage;
And a fourth step (S4) of judging the leakage leakage detection signal only when the leak detection signal is detected and the leakage detection signal is not detected.

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