KR200321445Y1 - apparatus for measuring the amount of flowing water using ultrasonic sensor - Google Patents

Abstract

The present invention relates to a device for measuring the discharge flow rate of the factory and the flow rate of the farm, and more particularly to an apparatus for measuring the flow rate by installing the ultrasonic sensor to detect the difference in the delivery time of the ultrasonic wave.

Therefore, in the present invention, the sensor connecting rods (3) equipped with ultrasonic sensors (1) and (2) at both ends, and the fittings (4) installed at one end of the sensor connecting rods (3), the opposite side of the floats (4) The ultrasonic sensor 1 installed is fixed to the bottom surface center width of the channel 5, but the sensor connecting rod 3 is installed so as to lie parallel to the longitudinal direction of the channel 5, the two sensors (1) (2) Provided is an apparatus for measuring the flow rate by detecting a difference in the delivery time of the ultrasonic wave emitted from.

The present invention as described above has the advantage that the accuracy is improved by passing through the center of the fluid in detecting the speed of the fluid, the configuration of the device is very simple and low cost.

It is also easy to install and easy to maintain.

Description

Apparatus for measuring the amount of flowing water using ultrasonic sensor

The present invention relates to a device for measuring the discharge flow rate of the factory and the flow rate of the farm, and more particularly to an apparatus for measuring the flow rate by installing the ultrasonic sensor to detect the difference in the delivery time of the ultrasonic wave.

Usually, a flow rate measuring device is used to measure the flow rate of industrial water discharged from a factory or agricultural water flowing through a farm road, and conventionally, a plurality of sensors are installed on both side walls of the channel at regular intervals and the flow rate is measured through the sensor.

However, such a conventional flow measurement device has a disadvantage in that it is difficult to accurately measure the flow rate, the accuracy is low, and the installation cost is high because a large number of sensors are required.

In order to solve the above problems, the present invention is to provide a flow rate measuring device for measuring the flow rate by detecting the difference in the delivery time of the ultrasonic wave having two ultrasonic sensors for firing the ultrasonic waves to pass through the center of the fluid.

1 is a perspective view showing an embodiment of the present invention.

Figure 2a is a side view showing the flow measuring device in FIG.

FIG. 2B is a plan view of the flow measuring apparatus in FIG. 1; FIG.

Figure 3 is a side view showing that the flow rate measuring device of the present invention is moved according to the water level.

Figure 4 is a cross-sectional view showing the interior of the water channel in which an embodiment of the present invention is installed.

Figure 5 is a perspective view showing another embodiment of the present invention.

Figure 6a is a side view showing the flow rate measuring device in FIG.

FIG. 6B is a plan view showing the flow measuring apparatus in FIG. 5; FIG.

Figure 7 is a cross-sectional view showing the inside of the water channel in which another embodiment of the present invention is installed.

* Description of the symbols for the main parts of the drawings *

1: 1st sensor 2: 2nd sensor

3: sensor connecting rod 4: float

5: waterway

Hereinafter, described in detail with reference to the accompanying drawings, the flow rate measuring apparatus of the present invention.

1 is a perspective view showing an embodiment of the present invention, the flow measuring device of the present invention is provided with a sensor connecting rod (3) equipped with an ultrasonic sensor (1) (2) at both ends, the sensor connecting rod (3) At one end of the buckle 4 is installed.

The flow rate measuring device of the present invention having such a configuration, as shown in the drawing, the first sensor 1 installed on the opposite side of the two mouth of the two ultrasonic sensors (1) (2) of the channel 5 Fix it on the bottom surface.

At this time, the first sensor 1 is installed in the center of the width of the channel 5 and the sensor connecting rod 3 is installed so as to lie parallel to the longitudinal direction of the channel (5).

When water flows into the water channel 5 in which the present invention is installed as described above, as shown in FIG. A constant inclination angle is achieved, and since the opposing relationship between the sensor 1 and the sensor 2 is maintained as it is, the angles of the sensors 1 and 2 need not be corrected. At this time, as shown in Figure 3 depending on the amount of water flowing in the channel 5, the floating height of the float 4 is different and the angle formed by the sensor connecting rod (3).

Therefore, even if the amount of water flowing into the channel 5 is different, the second sensor 2 is always located close to the water surface by the buoy 4 so that the flow rate of the total flow rate can be measured.

The first sensor 1 and the second sensor 2 are sensors capable of emitting ultrasonic waves and detecting the emitted ultrasonic waves.

This will be described the operation of the present invention.

First, ultrasonic waves are emitted from the first sensor 1 to the second sensor 2 and conversely, ultrasonic waves are emitted from the second sensor 2 to the first sensor 1 to detect time differences between the ultrasonic waves.

In general, ultrasonic waves have a specific transmission velocity in a specific fluid. For example, water has a permeation rate of 1482 kPa at a water temperature of 20 ° C.

Therefore, when the distance between the first sensor 1 and the second sensor 2 is fixed, when the fluid is stopped, the ultrasonic arrival time between the two sensors 1 and 2 coincides. However, when the fluid is flowing, the ultrasonic arrival time does not match. That is, the ultrasonic waves emitted in the flow direction of the fluid arrive faster than the ultrasonic waves fired backward in the fluid flow, and likewise the reverse ultrasonic waves arrive later than the forward ultrasonic waves.

If the time difference of the ultrasonic wave transfer generated here is ΔT, this ΔT will match the flow velocity of the fluid. Therefore, by detecting this ΔT, the flow velocity can be known, and multiplying this flow velocity by the cross-sectional area of the channel,

Q = A × V (Q is the flow rate, A is the area, V is the flow rate)

The flow rate can be converted according to the equation.

At this time, the cross-sectional area of the channel may be measured by detecting the inclination angle of the sensor connecting rod (3) value, or may be measured by attaching a separate level gauge.

In general, the fluid has a high velocity at the center and a low velocity at the wall surface. In the present invention, since the first sensor 1 is installed at the center portion in the width direction of the channel 5, as shown in FIG. 4, ultrasonic waves always move to the center of the channel. Since it penetrates and measures the total velocity of the fluid flowing through the channel 5, the accuracy is very high.

In addition, the ultrasonic flowmeter according to the present invention is provided with a spherical buoy to the sensor installed on one end of the connecting rod and the two sensors facing each other based on the connecting rod. The ultrasonic flow rate measuring device according to the present invention changes the angle between the sensor on the spherical side and the depth side when the water level is changed. In this process, the spherical sphere has no resistance in the process of changing the angle. It can be handled very flexibly without any adjustment in measurement. This is possible due to the structure of the spherical buoy and the connecting rod which is a feature of the present invention.

The ultrasonic flow rate measuring device according to the present invention can cope flexibly even in an environment where the water level is changed. That is, two sensors are connected to each other by connecting rods, and one sensor is provided with a spherical float, and the ultrasonic flowmeter of this structure can flexibly cope with the change of water level by the following process.

First, when the water level changes, the spherical floats rise or fall in line with the surface of the water. At this time, the spherical spheres are evenly resisted, and only the angle between the sensor on the side sphere and the sensor on the bottom side is changed, and these two sensors maintain the opposite relationship. Therefore, the ultrasonic sensor according to the present invention can be expected to be a differentiated effect that automatically maintains the opposite relationship without the need to adjust the angle between the sensor according to the water level change as in the ultrasonic flowmeter according to the cited design.

In addition, the ultrasonic flowmeter according to the present invention does not need to separately provide an ultrasonic transducer for water temperature compensation if only the angle formed by the two sensors is checked because the distance between the two sensors is always fixed even when the water depth is changed. However, the length of the connecting rod provided in the ultrasonic flowmeter according to the present invention is most preferably configured to be longer than the depth.

In addition, the ultrasonic flowmeter according to the present invention changes the angle formed by the sensor on the spherical side and the depth side when the water level is changed. There is no need to make any adjustments in the measurement. It is very flexible and can measure flow rate even if the water level is low.

First, assuming that the flow rate is very low speed, the flow rate measurement result may be inaccurate because the transmission difference time of the ultrasonic signal is very small. However, according to the present invention, if the length of the connecting rods facing the two sensors is set to be very long, the transmission difference time of the ultrasonic signals between the two sensors can be increased, and the transmission difference time can be easily increased. Therefore, the ultrasonic flowmeter of the present invention is easy to measure the ultra-low flow rate.

On the other hand, Figure 5 is a perspective view showing another embodiment of the present invention, the sensor (11) 12 is mounted on both ends of the N-shaped sensor connecting rod 13, the one side 14 is installed. The sensor connecting rod 13 constitutes a horizontal axis in accordance with the width of the waterway 15, and the longitudinal axis in which the buckle 14 is installed at the end constitutes a long length.

Such a measuring device is installed on the bottom surface of the water channel 15 on the horizontal axis of the sensor connecting rod 13, the first sensor 11 is installed in a position close to the wall surface on one side of the water channel 15 and the water channel 15 It is installed in parallel with the width direction so that the longitudinal axis of the sensor connecting rod 13 is parallel to the longitudinal direction of the waterway (15).

In this case, as shown in FIG. 6B, the sensors 11 and 12 emit ultrasonic waves in a diagonal direction, and the first sensor 11 is located on one side wall of the channel 15 and the second sensor 12 is a channel. Since it is located close to the other side wall surface of (15), as shown in Figure 7, the ultrasonic wave passes through the central portion of the channel (15).

The sensor connecting rod 13 is a horizontal axis which is in contact with the bottom surface of the waterway 15 is hinged so that the longitudinal axis is rotated according to the flow rate.

Another embodiment of the present invention is also to measure the flow rate by firing and detecting the ultrasonic wave between the first sensor 11 and the second sensor 12, the longitudinal axis of the sensor connecting rod 13 when the water level changes The angle of inclination with the bottom surface of the channel 15 is achieved, but since the opposing relationship between the sensor 11 and the sensor 12 is maintained as it is, the angles of the sensors 11 and 12 need not be corrected. Since the flow rate measuring action and the flow rate detecting method are the same as in the above-described embodiment, the description thereof will be omitted.

As can be seen from the above, the present invention has an advantage in that the precision is improved by passing through the center of the fluid in detecting the speed of the fluid, and the configuration of the device is very simple and the cost is low.

It is also easy to install and easy to maintain.

Claims (2)

An ultrasonic sensor (1) (2) for emitting ultrasonic waves from the first sensor (1) to the second sensor (2) and conversely emitting ultrasonic waves from the second sensor (2) to the first sensor (1); Sensor connecting rods (3) equipped with the ultrasonic sensor (1) (2) at both ends; And And a spherical buoy 4 installed at one end of the sensor connecting rod 3; The ultrasonic sensor 1 installed on the opposite side of the float 4 is fixed to the bottom surface of the center of the width of the channel 5, but the sensor connecting rod 3 is installed so as to lie parallel to the longitudinal direction of the channel 5. The sensor (1) and (2) maintain the opposite relationship even when the water level changes When the floating height of the float 4 installed at one end of the sensor connecting rod (3) is changed according to the water level, the inclination angle of the sensor connecting rod (3) and the bottom surface is changed to detect the inclination angle to obtain the cross-sectional area of the channel. And measuring the flow rate by detecting a difference in the delivery time of the ultrasonic waves emitted by the two sensors (1) and (2). An ultrasonic sensor (11) (12) for emitting ultrasonic waves from the first sensor (11) to the second sensor (12) and conversely emitting ultrasonic waves from the second sensor (12) to the first sensor (11); N-shaped sensor connecting rods 13 having ultrasonic sensors 11 and 12 mounted at both ends thereof; And And a spherical buckle 14 provided at the end of the longitudinal axis of the sensor connecting rod 13; The horizontal axis of the sensor connecting rod 13 is installed on the bottom surface of the water channel 15, while the ultrasonic sensor 11 is positioned at a position close to one wall surface of the water channel 15, and the horizontal axis of the sensor connecting rod 13 is the water channel 15 Parallel to the width direction of the sensor and the longitudinal axis of the sensor connecting rod 13 is installed so as to be parallel to the longitudinal direction of the water channel (15) to move according to the water level, the sensor (1) (2) has an opposite relationship even when the water level fluctuates Keep it up, When the floating height of the buckle 14 installed at one end of the sensor connecting rod 13 is changed according to the water level, the horizontal axis which comes into contact with the bottom surface of the waterway 15 becomes a hinge, and the inclination angle formed by the longitudinal axis and the bottom surface is changed. It is used to find the cross-sectional area of the channel by detecting the inclination angle, and detects the difference in the transmission time of the ultrasonic waves emitted by the two sensors (11, 12) to measure the average flow rate and flow rate in the channel .