CN109883514B - Liquid level data detection device and method - Google Patents
Liquid level data detection device and method Download PDFInfo
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- CN109883514B CN109883514B CN201910201136.1A CN201910201136A CN109883514B CN 109883514 B CN109883514 B CN 109883514B CN 201910201136 A CN201910201136 A CN 201910201136A CN 109883514 B CN109883514 B CN 109883514B
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Abstract
The invention discloses a liquid level data detection device and a method, wherein the device comprises: the ultrasonic wave focusing device comprises an ultrasonic wave sensor, a controller and an ultrasonic wave focusing cover; the ultrasonic wave-gathering cover comprises a curved surface; the controller is connected with the ultrasonic sensor; the concave surface of curved surface is relative with ultrasonic sensor, and the concave surface of curved surface can be with the ultrasonic wave that ultrasonic sensor sent along first reflection beam direction parallel shooting to can assemble the ultrasonic sensor along the ultrasonic wave of the parallel entering concave surface of first reflection beam direction. The technical problem that the liquid level data detected in the prior art is inaccurate due to the fact that the second ultrasonic wave reflection wave energy value is small in the prior art is solved, and the technical effect of improving the accuracy of obtaining the accurate liquid level data of the water area to be detected is achieved.
Description
Technical Field
The invention relates to the field of drainage pipe networks, in particular to a liquid level data detection device and method.
Background
Along with the development of science and technology, people have more and more great demand on liquid level monitoring in municipal and water conservancy fields such as rainwater, sewage, reclaimed water, river channels, lakes, roads and the like. In recent years, multiple cities in China have waterlogging in rainy seasons, and the urban waterlogging system has the characteristics of wide occurrence range, large ponding depth and long ponding time. The occurrence of the waterlogging event not only brings inconvenience to people going out in rainy days, but also causes great loss of personal and public property, even threatens the life safety of people, and arouses wide attention in all aspects of society.
Accurately monitoring the liquid level data is the basis for addressing urban waterlogging events. In the prior art, the liquid level data of a water area to be detected is mainly obtained by directly transmitting and receiving ultrasonic waves by an ultrasonic sensor. However, this method has a technical problem that the energy value of the ultrasonic echo (reflected wave) is small, and thus the detected liquid level data is inaccurate.
Disclosure of Invention
The invention aims to provide a liquid level data detection device and a liquid level data detection method, aiming at improving the accuracy of obtaining accurate liquid level data of a water area to be detected.
In a first aspect, an embodiment of the present invention provides a liquid level data detection apparatus, including: the ultrasonic wave focusing device comprises an ultrasonic wave sensor, a controller and an ultrasonic wave focusing cover;
the ultrasonic wave-gathering cover comprises a curved surface;
the controller is connected with the ultrasonic sensor; the concave surface of the curved surface is opposite to the ultrasonic sensor, and the concave surface of the curved surface can emit the ultrasonic wave emitted by the ultrasonic sensor in parallel along a first reflected beam direction and can converge the ultrasonic wave entering the concave surface in parallel along the first reflected beam direction onto the ultrasonic sensor;
the controller controls the ultrasonic sensor to emit ultrasonic waves, the ultrasonic waves reach the concave surface of the curved surface, the curved surface enables the ultrasonic waves to be emitted in parallel along the direction of a first reflected wave beam, and second reflected waves reflected after the ultrasonic waves reach a water area to be detected are converged on the ultrasonic sensor; the ultrasonic sensor converts the second reflected wave into an electric signal and sends the electric signal to the controller; and the controller acquires the liquid level data of the water area to be detected according to the electric signal.
Optionally, the curved surface is a curved surface cut from a paraboloid, and the ultrasonic sensor is disposed at a focus of the curved surface.
Optionally, the ultrasonic wave focusing cover further includes a first flat plate, a second flat plate and a third flat plate, the first flat plate and the second flat plate are arranged in parallel, the third flat plate is arranged perpendicular to the first flat plate and the second flat plate, and the curved surface is arranged between the first flat plate, the second flat plate and the third flat plate.
Optionally, the curved surface includes four edges, two of the four edges may coincide with a generatrix of the paraboloid, and a plane on which the other two edges are located is perpendicular to an axis of the paraboloid;
two edges of the curved surface, which can be coincident with a generatrix of the paraboloid, are respectively connected with the first flat plate and the second flat plate, and one of the other two edges of the curved surface is connected with the third flat plate.
Optionally, the first and second panels include a first edge, a second edge, a third edge, and a fourth edge, the first edge being parallel to the three edges, the fourth edge being perpendicular to the first edge and the third edge;
the first plate is parallel to the second plate, and a first edge, a second edge, a third edge and a fourth edge of the first plate are respectively opposite to a first edge, a second edge, a third edge and a fourth edge of the second plate;
the second edges of the first flat plate and the second flat plate are parabolic, and the parabolic is superposed with the generatrix of the paraboloid, so that the curved surface can be tightly attached to the first flat plate and the second flat plate;
the third plate is in close contact with the first edges of the first plate and the second plate.
Optionally, the first flat plate, the second flat plate, the third flat plate and the curved surface are integrally formed.
Optionally, the device further comprises a protection box, and the controller is arranged in the protection box;
the ultrasonic wave gathering cover is connected with the outer wall of the protection box body through the fourth edge;
the ultrasonic sensor is arranged on the outer wall of the protection box body and is surrounded by the ultrasonic wave gathering cover.
Optionally, the device further comprises a pressure sensor, and the pressure sensor is connected with the controller;
the pressure sensor is used for detecting the pressure in the blind area range of the ultrasonic sensor and sending a pressure signal obtained by detection to the controller; and the controller acquires the liquid level data of the water area to be detected according to the pressure signal.
Optionally, the device further comprises a temperature sensor, and the temperature sensor is connected with the controller;
the temperature sensor is used for detecting the ambient temperature on the ultrasonic wave-generating path, sending the detected temperature signal to the controller, and the controller compensates the liquid level data according to the temperature signal.
In a second aspect, an embodiment of the present invention provides a liquid level data detection method, in which any one of the above liquid level data detection apparatuses is applied, including:
the controller controls the ultrasonic sensor to emit ultrasonic waves, the ultrasonic waves reach the concave surface of the curved surface, the curved surface enables the ultrasonic waves to be emitted in parallel along the direction of a first reflected wave beam, and second reflected waves reflected after the ultrasonic waves reach a water area to be detected are converged on the ultrasonic sensor;
the ultrasonic sensor converts the second reflected wave into an electric signal and sends the electric signal to the controller;
and the controller acquires the liquid level data of the water area to be detected according to the electric signal.
Compared with the prior art, the invention has the following beneficial effects:
the embodiment of the invention provides a liquid level data detection device and a method, wherein the device comprises: the ultrasonic wave focusing device comprises an ultrasonic wave sensor, a controller and an ultrasonic wave focusing cover; the ultrasonic wave-gathering cover comprises a curved surface; the controller is connected with the ultrasonic sensor; the concave surface of curved surface is relative with ultrasonic sensor, and the concave surface of curved surface can be with the ultrasonic wave that ultrasonic sensor sent along first reflection beam direction parallel shooting to can assemble the ultrasonic sensor along the ultrasonic wave of the parallel entering concave surface of first reflection beam direction. The controller controls the ultrasonic sensor to send out ultrasonic waves, the ultrasonic waves reach the concave surface of the curved surface, the curved surface enables the ultrasonic waves to be emitted in parallel along the direction of the first reflected wave beam, and second reflected waves reflected after the ultrasonic waves reach the water area to be detected are converged on the ultrasonic sensor; the ultrasonic sensor converts the second reflected wave into an electric signal and sends the electric signal to the controller; the controller obtains the liquid level data of the water area to be measured according to the electric signal. The concave surface of curved surface can assemble the ultrasonic wave that gets into the concave surface along the first reflection beam direction is parallel to ultrasonic sensor on, has strengthened the ultrasonic wave's that ultrasonic sensor obtained echo energy value to strengthened the signal of telecommunication that sends the controller, the controller obtains the liquid level data in the waters that awaits measuring according to the signal of telecommunication, thereby improved the degree of accuracy that obtains the accurate liquid level data in the waters that awaits measuring. Thus. The technical problem that the detected liquid level data is inaccurate due to the fact that the second ultrasonic wave reflection wave energy value is small in the prior art is solved, and the technical effect of improving the accuracy of obtaining the accurate liquid level data of the water area to be detected is achieved.
Additional features and advantages of embodiments of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 shows a schematic structural diagram of a liquid level data detection apparatus 100 according to an embodiment of the present invention.
Fig. 2 shows a diagram of a parabola provided by an embodiment of the present invention.
Fig. 3 shows a cross-sectional view of a paraboloid provided by an embodiment of the present invention.
Fig. 4 shows a shape diagram of an ultrasonic wave focusing cover according to an embodiment of the present invention.
Fig. 5 shows a flow chart of a liquid level data detection method according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The occurrence of the waterlogging event not only brings inconvenience to people going out in rainy days, but also causes great loss of personal and public property, even threatens the life safety of people, and arouses wide attention in all aspects of society.
In order to solve and deal with urban inland inundation events, on one hand, engineering measures are relied on, standards are improved through planning and design, an urban drainage and waterlogging prevention system is perfected, the impervious surface of the urban surface is controlled, the runoff yield of the source is reduced, and the storage and drainage capacity of downstream receiving water bodies is improved; on the other hand, a drainage monitoring and early warning system is established by means of management measures, dynamic monitoring data of drainage system operation are provided for government departments, and refined and timely early warning and forecasting information is provided for public trips, so that urban inland inundation events of different degrees can be scientifically and effectively dealt with.
The ultrasonic liquid level detection method in the prior art adopts a mode that an ultrasonic sensor directly receives transmitted waves, has the technical problems of small ultrasonic echo energy value, short detection distance and overlarge or blind detection area in the liquid level detection process, and has higher installation requirement on ultrasonic equipment, so the liquid level data measurement method in the prior art can not meet the requirements of people. Therefore, a device for detecting liquid level data, which is convenient, fast, stable, convenient to implement and install, is urgently needed by people.
Therefore, the embodiment of the invention provides a liquid level data detection device and a liquid level data detection method, which are used for solving the technical problems that in the prior art, the ultrasonic echo energy value is small, the detection distance is short, and a blind area is too large or the detection blind area exists in the liquid level detection process, so that the liquid level data detected in the prior art is inaccurate.
Examples
A liquid level detecting device 100 according to an embodiment of the present invention includes an ultrasonic sensor 110, a controller 120, and an ultrasonic wave focusing cover 130 as shown in fig. 1.
The ultrasonic wave focusing cover 130 includes a curved surface 131, the controller 120 is connected to the ultrasonic sensor 110, a concave surface of the curved surface 131 is opposite to the ultrasonic sensor 110, and the concave surface of the curved surface 131 can emit the ultrasonic wave emitted from the ultrasonic sensor 110 in parallel along the first reflected beam direction and can focus the ultrasonic wave entering the concave surface in parallel along the first reflected beam direction onto the ultrasonic sensor 110.
The controller 120 controls the ultrasonic sensor 110 to emit ultrasonic waves, the ultrasonic waves reach the concave surface of the curved surface 131, the curved surface 131 parallelly emits the ultrasonic waves along the direction of the first reflected wave beam, and second reflected waves reflected after the ultrasonic waves reach a water area to be measured are converged on the ultrasonic sensor 110; the ultrasonic sensor 110 converts the second reflected wave into an electric signal and transmits the electric signal to the controller 120; the controller 120 obtains the liquid level data of the water area to be measured according to the electric signal.
By adopting the above scheme, the device includes: an ultrasonic sensor 110, a controller 120, and an ultrasonic wave focusing cover 130; the ultrasonic wave focusing cover 130 includes a curved surface 131; the controller 120 is connected with the ultrasonic sensor 110; the concave surface of the curved surface 131 faces the ultrasonic sensor 110, and the concave surface of the curved surface 131 can emit the ultrasonic waves emitted by the ultrasonic sensor 110 in parallel along the first reflected beam direction and can converge the ultrasonic waves entering the concave surface in parallel along the first reflected beam direction onto the ultrasonic sensor 110. The controller 120 controls the ultrasonic sensor 110 to emit ultrasonic waves, the ultrasonic waves reach the concave surface of the curved surface 131, the curved surface 131 parallelly emits the ultrasonic waves along the direction of the first reflected wave beam, and second reflected waves reflected after the ultrasonic waves reach a water area to be measured are converged on the ultrasonic sensor 110; the ultrasonic sensor 110 converts the second reflected wave into an electric signal and transmits the electric signal to the controller 120; the controller 120 obtains the liquid level data of the water area to be measured according to the electric signal. The concave surface of the curved surface 131 can converge the ultrasonic waves entering the concave surface in parallel along the first reflected beam direction onto the ultrasonic sensor 110, so that the echo energy value of the ultrasonic waves obtained by the ultrasonic sensor 110 is enhanced, an electric signal sent to the controller 120 is enhanced, the controller 120 obtains the liquid level data of the water area to be detected according to the electric signal, and the accuracy of obtaining the accurate liquid level data of the water area to be detected is improved. Thus. The technical problem that the detected liquid level data is inaccurate due to the fact that the second ultrasonic wave reflection wave energy value is small in the prior art is solved, and the technical effect of improving the accuracy of obtaining the accurate liquid level data of the water area to be detected is achieved.
In order to achieve the wave-focusing effect of the curved surface 131, as an alternative embodiment, the curved surface 131 is a curved surface 131 cut from a paraboloid, and the ultrasonic sensor 110 is disposed at the focus of the curved surface 131, opposite to the concave surface of the curved surface 131.
The wave-gathering principle of the curved surface 131 is as follows: for a paraboloid, ultrasonic waves emitted from a focus of the paraboloid reach a concave surface of the paraboloid, and the concave surface of the paraboloid reflects the ultrasonic waves along a first reflection direction. If the material of the paraboloid can be made to have good reflectivity with respect to the ultrasonic waves incident on the concave surface of the paraboloid in the direction opposite to the first reflection direction, the paraboloid can reflect all the ultrasonic waves incident on the concave surface of the paraboloid in the direction opposite to the first reflection direction to the focal point of the paraboloid. Specifically, as shown in fig. 2. Since the paraboloid is obtained by rotating the parabola along the axis as the generatrix, we describe the reflection principle of the parabola on the ultrasonic wave by the parabola.
In FIG. 2, the straight line NT is a parabola x2Tangent line at point P (x0, y0) of-2 × P × y, parabolic line is thrownx2The derivative of-2 × p × y, i.e., the tangent slope equation, is:
tangent equation: parabola x2Tangent equation at one point (x0, y0) on-2 × p × y
The focus of the parabola is
The equation of the directrix is
According to the definition of parabola:
by the parabolic equation, let x be x0, line x02-2 × p × y0, i.e.
From the parabolic tangent equation: let x be 0 and x be equal to 0,
i.e. when x is 0,
the T point coordinates are (0, -y 0). Straight line
So PF is equal to FT, get < FTP ═ FPT, because the parabolic tangent line is equal to the included angle of the reflected wave of sending out the ultrasonic wave from the focus, namely < FPT ═ MPN, so < FTP ═ MPN, so get: MP is parallel to the y-axis.
The parabola has the property that: if the reflection performance of the parabolic curved surface 131 is sufficiently good and the ultrasonic sensor 110 is located at the focus of the parabola, the ultrasonic wave traveling parallel to the symmetry axis (y-axis) of the parabola and striking the concave surface of the parabola thereof is reflected to the focus thereof (i.e., the ultrasonic sensor 110) regardless of where the parabola is reflected. Instead, the ultrasonic waves generated from the point source at the focal point (ultrasonic sensor 110) are reflected as ultrasonic beams parallel to the y-axis.
Since the paraboloid is obtained by rotating along the axis with the parabola as the generatrix, the paraboloid has the same property as the parabola. For this reason, the ultrasonic waves emitted from the intersection point of the paraboloids reach the concave surface of the curved surface 131, and the reflection of the ultrasonic waves by the concave surface of the curved surface 131 is along the first reflection direction. For the ultrasonic waves incident on the concave surface of the curved surface 131 in the direction opposite to the first reflection direction, if the reflectivity of the material of the curved surface 131 is good, the curved surface 131 can reflect all the ultrasonic waves incident on the concave surface of the curved surface 131 in the direction opposite to the first reflection direction to the focal point of the curved surface 131, that is, to emit the ultrasonic waves to the ultrasonic sensor 110, so that the number of return waves received by the ultrasonic sensor 110 is increased, and the energy value of the return waves received by the ultrasonic sensor 110 is increased. After the parabola is rotated, a three-dimensional paraboloid is obtained, and the focus of the paraboloid is (0, 0, -60). When the ultrasonic sensor 110 is placed at the focal point (0, 0, -60) and waves are transmitted toward the parabolic cover (enhanced ultrasonic wave focusing cover 130), the enhanced ultrasonic wave focusing cover 130 has an effect of enhancing the focusing of the transmitted and received waves according to the nature of the paraboloid. The adopted coordinate system takes the vertex of the paraboloid as an origin to establish the coordinate system.
However, the paraboloid is a curved surface 131 with a cavity, and for the convenience of installation, the paraboloid adopted by the invention meets the conditions: parabolic generatrix x2-2 x p y, x is greater than or equal to 0, p is equal to 120. As shown in fig. 3. The focus of the parabolic generatrix in fig. 3 is (0, 60), the equation for the directrix is y 60, and x ranges from 0 to 165. Therefore, if the ultrasonic sensor 110 is placed at the focal point (0, 60) and waves are emitted toward the paraboloid (the curved surface 131), the ultrasonic wave focusing cover 130 has an effect of enhancing focusing of the emitted ultrasonic waves and the received ultrasonic waves according to the parabolic property.
According to experiments, when y>When the ratio is-17.6. Parabolic for transmitting and receiving ultrasonic waves (transmitting ultrasonic waves and receiving ultrasonic waves)The reinforcing and wave-focusing effects are poor, the material for manufacturing the ultrasonic wave-focusing cover 130 is required to have good reflection performance, the preset effect can be achieved only by the reinforcing and wave-focusing effects on the receiving and transmitting waves of the ultrasonic waves, and the manufacturing process requirement on the ultrasonic wave-focusing cover 130 is high and difficult to achieve. For this purpose, it is necessary to use>The paraboloid at-17.6 is truncated. The generatrix of the truncated paraboloid is the generatrix x2-2 x y, x is greater than or equal to 0, p is equal to 120, y>-17.6. As shown in fig. 3.
Because the ultrasonic sensor 110 can only face in one direction, only a portion of the paraboloid having 360 has a wave-focusing effect on the ultrasonic sensor 110. The curved surface 131 for reflection is expensive to manufacture, and thus a paraboloid having a poor wave-collecting effect is removed and directly formed into a flat surface.
In order to reduce the energy loss of the ultrasonic waves in the ultrasonic wave focusing cover 130, as an alternative embodiment, the ultrasonic wave focusing cover 130 further includes a first flat plate, a second flat plate, and a third flat plate, the first flat plate is disposed parallel to the second flat plate, the third flat plate is disposed perpendicular to the first flat plate and the second flat plate, and the curved surface 131 is disposed between the first flat plate, the second flat plate, and the third flat plate. To achieve the above object, the curved surface 131 is a partial paraboloid cut along a generatrix direction of the paraboloid. Specifically, the curved surface 131 includes four edges, two of the four edges may coincide with a generatrix of the paraboloid, and a plane where the other two edges are located is perpendicular to an axis of the paraboloid; two edges of the curved surface 131, which may coincide with a generatrix of the paraboloid, are connected to the first plate and the second plate, respectively, and one of the other two edges of the curved surface 131 is connected to the third plate. The first flat plate and the second flat plate comprise a first edge, a second edge, a third edge and a fourth edge, the first edge is parallel to the three edges, and the fourth edge is perpendicular to the first edge and the third edge; the first plate is parallel to the second plate. The first edge, the second edge, the third edge and the fourth edge of the first flat plate are respectively opposite to the first edge, the second edge, the third edge and the fourth edge of the second flat plate, the second edges of the first flat plate and the second flat plate are parabolic, and the parabolic is superposed with a generatrix of the parabolic surface, so that the curved surface 131 can be tightly attached to the first flat plate and the second flat plate; the third plate is closely attached to the first edges of the first plate and the second plate. Further, the first plate, the second plate, the third plate and the curved surface 131 are integrally formed according to the above-mentioned edge connection manner, so as to prevent the ultrasonic waves in the ultrasonic wave focusing cover 130 from leaking, increase the number of effective ultrasonic waves, and thus increase the energy of the effective ultrasonic waves, wherein the effective ultrasonic waves refer to the ultrasonic waves emitted to the water area to be measured or the ultrasonic waves reflected to the ultrasonic sensor 110.
In the smart cut manufacturing technique, the manufacturing operation is performed by controlling a machine for manufacturing the ultrasonic wave focusing cover 130 in the following manner to obtain the above-described ultrasonic wave focusing cover 130 which is integrally formed. A three-dimensional coordinate system is determined by taking the vertex of the paraboloid as an origin and the axis of the paraboloid as a Z axis. By removing the satisfying x2+y2A part of the paraboloid of-2 × p × z, in which z is greater than or equal to-17.6, namely, when z is greater than or equal to-17.6 and y is equal to-17.6, a third flat plate is obtained; removing the part of the paraboloid y which is more than or equal to 45, namely when z is more than or equal to 45, y is equal to 45, and obtaining a second plate; and removing the part of the paraboloid y which is less than or equal to-45, namely when z is less than or equal to-45 and y is equal to-45, obtaining the first flat plate. Wherein, the focus of the paraboloid is (0, 0, -60), and the value of x ranges from 0 to 165; y ranges from 0 to 165. The shape as in fig. 4 is obtained. The shape of the integrally formed ultrasonic wave focusing cage 130 in the embodiment of the present invention is the shape as shown in fig. 4. A, B, C and D in the figure indicate the third flat plate, the second flat plate, the first flat plate and the curved surface 131, respectively.
As an alternative embodiment, the apparatus further includes a protective box 160, and the controller 120 is disposed in the protective box 160; the ultrasonic wave focusing cover 130 is connected with the outer wall of the protective box 160 through a fourth edge; the ultrasonic sensor 110 is disposed on an outer wall of the protective case 160 and surrounded by the ultrasonic focus cap 130. The third edges of the first and second plates and the curved surface 131 and the outer wall of the protective case 160 enclose an ultrasonic outlet.
Because the liquid level data detection mode based on the ultrasonic sensor 110 can only obtain the position of the liquid level of the water area to be detected, the distance between the liquid level and the ultrasonic sensor 110, and other liquid level data calculated according to the distance. And because ultrasonic sensor exists the measurement blind area, consequently, need be in ultrasonic sensor blind area within range, need another kind of mode of measuring the liquid level, pressure sensor measures the liquid level information promptly.
As an alternative embodiment, the liquid level data detection apparatus 100 further includes a pressure sensor 140; the pressure sensor 140 is connected to the controller 120; the pressure sensor 140 is configured to detect a pressure within a blind area range of the ultrasonic sensor 110, and send a detected pressure signal to the controller 120; the controller 120 obtains the liquid level data of the water area to be measured according to the pressure signal. Wherein the blind area range of the ultrasonic sensor 110 is in the range of 0 to 0.25 m.
By adopting the measuring method combining the ultrasonic sensor and the pressure sensor, the influence of the dead zone of the ultrasonic sensor on the measured liquid level can be effectively avoided, and the overall stability of the equipment is improved.
Because the liquid level data detection method based on the ultrasonic sensor 110 can only obtain the position of the liquid level of the water area to be detected, and because of the inevitable energy loss of the ultrasonic waves, the liquid level data obtained based on the liquid level data detection method of the ultrasonic sensor 110 has errors. Therefore, the liquid level data detection apparatus 100 also needs to compensate the temperature of the liquid level data detected by the ultrasonic sensor 110.
As an alternative embodiment, the liquid level data detection device 100 further includes a temperature sensor 150, and the temperature sensor 150 is connected to the controller 120; the temperature sensor 150 is configured to detect an ambient temperature on the ultrasonic wave transmission path, and transmit a detected temperature signal to the controller 120, and the controller 120 compensates the liquid level data according to the temperature signal. Specifically, the compensation is based on the fluid level data obtained by the ultrasonic sensor 110, and the compensation is based on the fluid level data obtained by the pressure sensor 140.
By adopting the above scheme, the controller 120 compensates the liquid level data according to the temperature signal, and the accuracy of the liquid level data detection device 100 for detecting the liquid level data is improved.
As an alternative embodiment, the liquid level data detection device 100 sends the liquid level information to a remote server, and the server is in remote communication with the controller for displaying the liquid level data.
When a user uses the liquid level data detection device 100, in a first aspect, the ultrasonic sensor 110 emits ultrasonic waves, after the ultrasonic waves reach the concave surface of the curved surface 131, the ultrasonic waves are emitted in parallel from the third edges of the first flat plate and the second flat plate and the ultrasonic outlet defined by the curved surface 131 and the outer wall of the protection box 160 along the first reflection direction to form a first reflected wave, after the first reflected wave vertically reaches the page of the water area to be detected, the first reflected wave is reflected according to the direction of the emitted wave, that is, along the second reflection direction, the first reflected wave is reflected back to the concave surface of the curved surface 131, that is, a second reflected wave is formed, and the second reflected wave is emitted by the concave surface of the curved surface 131 and converged. The ultrasonic sensor 110 converts the second reflected wave into an electrical signal and sends the electrical signal to the controller 120, and the controller 120 obtains the liquid level data of the water area to be measured according to the electrical signal. Specifically, the distance from the page of the water area to be measured to the ultrasonic sensor 110 is obtained. In a second aspect, the pressure sensor 140 is disposed in a dead zone of the ultrasonic sensor 110 in the water area to be detected, that is, in a range from the liquid level of the water area to the bottom of the water area to be detected, so as to detect the pressure in the dead zone, and send a detected pressure signal to the controller 120, and the controller 120 obtains the liquid level data of the water area to be detected according to the pressure signal. In a third aspect, the temperature sensor 150 is disposed in the dead zone of the ultrasonic sensor 110 in the water area to be detected, i.e., in the range from the liquid level of the water area to the bottom of the water area to be detected, so as to detect the temperature of the water in the dead zone, and the detected temperature signal is transmitted to the controller 120, so that the controller 120 compensates the liquid level data according to the temperature signal. The real ware sends liquid level data to the server, and the user can read out liquid level data through the server.
Through adopting above scheme, above-mentioned liquid level data detection device 100 simple structure, simple to operate strengthens ultrasonic wave echo energy value and can obtain the liquid level data of blind area, has improved the accuracy of the liquid level data who obtains.
The embodiment of the present application also provides a liquid level data detecting method, including S100 to S300 shown in fig. 5, where S100 to S300 are described below with reference to fig. 5.
S100: the controller 120 controls the ultrasonic sensor 110 to emit ultrasonic waves, the ultrasonic waves reach the concave surface of the curved surface 131, the curved surface 131 emits the ultrasonic waves in parallel along the direction of the first reflected beam, and second reflected waves reflected after the ultrasonic waves reach the water area to be measured are converged on the ultrasonic sensor 110.
S200: the ultrasonic sensor 110 converts the second reflected wave into an electric signal and transmits the electric signal to the controller 120.
S300: the controller 120 obtains the liquid level data of the water area to be measured according to the electric signal.
As an optional implementation, the method further comprises: the pressure sensor 140 detects the pressure within the blind zone range of the ultrasonic sensor 110, and sends a detected pressure signal to the controller 120; the controller 120 obtains the liquid level data of the water area to be measured according to the pressure signal; the range of the blind zone of the ultrasonic sensor 110 refers to a fixed value, and the range of the designed blind zone is 0 to 0.25 m.
As an optional implementation, the method further comprises: the temperature sensor 150 detects the temperature of the water area to be measured, and transmits a detected temperature signal to the controller 120, and the controller 120 compensates the liquid level data according to the temperature signal.
In summary, the embodiments of the present invention provide an apparatus and a method for detecting liquid level data, where the apparatus includes: the ultrasonic wave focusing device comprises an ultrasonic wave sensor, a controller and an ultrasonic wave focusing cover; the ultrasonic wave-gathering cover comprises a curved surface; the controller is connected with the ultrasonic sensor; the concave surface of curved surface is relative with ultrasonic sensor, and the concave surface of curved surface can be with the ultrasonic wave that ultrasonic sensor sent along first reflection beam direction parallel shooting to can assemble the ultrasonic sensor along the ultrasonic wave of the parallel entering concave surface of first reflection beam direction. The controller controls the ultrasonic sensor to send out ultrasonic waves, the ultrasonic waves reach the concave surface of the curved surface, the curved surface enables the ultrasonic waves to be emitted in parallel along the direction of the first reflected wave beam, and second reflected waves reflected after the ultrasonic waves reach the water area to be detected are converged on the ultrasonic sensor; the ultrasonic sensor converts the second reflected wave into an electric signal and sends the electric signal to the controller; the controller obtains the liquid level data of the water area to be measured according to the electric signal. The concave surface of curved surface can assemble the ultrasonic wave that gets into the concave surface along the first reflection beam direction is parallel to ultrasonic sensor on, has strengthened the ultrasonic wave's that ultrasonic sensor obtained echo energy value to strengthened the signal of telecommunication that sends the controller, the controller obtains the liquid level data in the waters that awaits measuring according to the signal of telecommunication, thereby improved the degree of accuracy that obtains the accurate liquid level data in the waters that awaits measuring. Thus. The technical problem that the detected liquid level data is inaccurate due to the fact that the second ultrasonic wave reflection wave energy value is small in the prior art is solved, and the technical effect of improving the accuracy of obtaining the accurate liquid level data of the water area to be detected is achieved.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. A liquid level detecting apparatus, comprising: the ultrasonic wave focusing device comprises an ultrasonic wave sensor, a controller and an ultrasonic wave focusing cover;
the ultrasonic wave focusing cover comprises a curved surface, wherein the curved surface is obtained by cutting from a paraboloid, and a generatrix x of the paraboloid2-2 x y, x is greater than or equal to 0, p is equal to 120;
the controller is connected with the ultrasonic sensor; the concave surface of the curved surface is opposite to the ultrasonic sensor, and the concave surface of the curved surface can emit the ultrasonic wave emitted by the ultrasonic sensor in parallel along a first reflected beam direction and can converge the ultrasonic wave entering the concave surface in parallel along the first reflected beam direction onto the ultrasonic sensor;
the controller controls the ultrasonic sensor to emit ultrasonic waves, the ultrasonic waves reach the concave surface of the curved surface, the curved surface enables the ultrasonic waves to be emitted in parallel along the direction of a first reflected wave beam, and second reflected waves reflected after the ultrasonic waves reach a water area to be detected are converged on the ultrasonic sensor; the ultrasonic sensor converts the second reflected wave into an electric signal and sends the electric signal to the controller; and the controller acquires the liquid level data of the water area to be detected according to the electric signal.
2. The apparatus of claim 1, wherein the curved surface is a surface taken from a paraboloid, and the ultrasonic sensor is disposed at a focal point of the curved surface.
3. The apparatus of claim 2, wherein the ultrasonic wave focus cage further comprises a first plate, a second plate, and a third plate, the first plate being disposed parallel to the second plate, the third plate being disposed perpendicular to the first plate and the second plate, the curved surface being disposed between the first plate, the second plate, and the third plate.
4. The device of claim 3, wherein the curved surface comprises four edges, two of which can be coincident with a generatrix of the paraboloid and the other two of which lie in a plane perpendicular to the axis of the paraboloid;
two edges of the curved surface, which can be coincident with a generatrix of the paraboloid, are respectively connected with the first flat plate and the second flat plate, and one of the other two edges of the curved surface is connected with the third flat plate.
5. The device of claim 4, wherein the first and second plates comprise first, second, third, and fourth edges, the first edge being parallel to the three edges, the fourth edge being perpendicular to the first and third edges;
the first plate is parallel to the second plate, and a first edge, a second edge, a third edge and a fourth edge of the first plate are respectively opposite to a first edge, a second edge, a third edge and a fourth edge of the second plate;
the second edges of the first flat plate and the second flat plate are parabolic, and the parabolic is superposed with the generatrix of the paraboloid, so that the curved surface can be tightly attached to the first flat plate and the second flat plate;
the third plate is in close contact with the first edges of the first plate and the second plate.
6. The device of claim 5, wherein the first plate, the second plate, the third plate, and the curved surface are integrally formed.
7. The apparatus of claim 6, further comprising a protective case, the controller being disposed within the protective case;
the ultrasonic wave gathering cover is connected with the outer wall of the protection box body through the fourth edge;
the ultrasonic sensor is arranged on the outer wall of the protection box body and is surrounded by the ultrasonic wave gathering cover.
8. The device of any one of claims 1-7, further comprising a pressure sensor, the pressure sensor being connected to the controller;
the pressure sensor is used for detecting the pressure in the blind area range of the ultrasonic sensor and sending a pressure signal obtained by detection to the controller; and the controller acquires the liquid level data of the water area to be detected according to the pressure signal.
9. The device of claim 8, further comprising a temperature sensor, the temperature sensor being connected to the controller;
the temperature sensor is used for detecting the ambient temperature on the ultrasonic wave-generating path, sending the detected temperature signal to the controller, and the controller compensates the liquid level data according to the temperature signal.
10. A liquid level data detecting method applied to the liquid level data detecting apparatus according to any one of claims 1 to 9, comprising:
the controller controls the ultrasonic sensor to emit ultrasonic waves, the ultrasonic waves reach the concave surface of the curved surface, the curved surface enables the ultrasonic waves to be emitted in parallel along the direction of a first reflected wave beam, and a second reflected wave reflected after the ultrasonic waves reach a water area to be detected is converged on the ultrasonic sensor, wherein the curved surface is obtained by cutting from a paraboloid, and a generatrix x of the paraboloid is obtained by cutting2-2 x y, x is greater than or equal to 0, p is equal to 120;
the ultrasonic sensor converts the second reflected wave into an electric signal and sends the electric signal to the controller;
and the controller acquires the liquid level data of the water area to be detected according to the electric signal.
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| US11852520B1 (en) | 2020-12-28 | 2023-12-26 | Xi'an Dinghua Electronics Co., Ltd. | Method for determining reflective surface of steering gear and focusing steering gear of external level gauge |
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| CN114966706B (en) * | 2022-04-14 | 2022-12-20 | 西安定华电子股份有限公司 | Determining method, determining system, reflector, vertical tank external liquid level meter and mounting method thereof |
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