Method and system for aligning transducer of trapezoidal water conveyance channel on water and calculating sound channel angle

Abstract

The present invention relates to a method and system for aligning a transducer on water and calculating an acoustic channel angle of a trapezoidal water conveyance channel, and belongs to a radio ultrasonic directional ranging method for a river channel. The method comprises the following steps: Step 1: measuring and obtaining parameter information of a trapezoidal channel section; the parameter information includes the channel bottom width; B , slope ratio of the slope, operating water depth H , installation height of transducer Z ; The slope ratio of the slope includes the slope ratio of the left side slope and the slope ratio of the right side slope; Step 2: First, install the transducer adjustment assembly on the keel of the bracket and slide it up and down; then, according to the pre-designed sound channel height, slide the transducer adjustment assembly to the set height position and lock it; secondly, place the bracket on the slope above the water, the transducer adjustment assembly automatically stands upright due to gravity, and the transducer can rotate at a horizontal angle; Step 3: Calculate the alignment angle of the emitting surfaces of the left and right transducers.

Description

Technical Field

[0001] The present invention belongs to the field of river channel radio ultrasonic directional ranging, specifically the technical field of water flow measurement in water diversion and regulation projects, and especially relates to a method and system for water alignment of a trapezoidal water conveyance channel transducer and calculation of a sound channel angle. Background Art

[0002] The emitting surfaces of a pair of transducers in the same underwater sound channel of the ultrasonic flowmeter need to be aligned with each other to ensure that the ultrasonic wave emitted by one transducer is received by the other transducer after propagating through the water medium, completing a correct signal output and reception process, otherwise the ultrasonic flowmeter will not work properly; in addition, it is necessary to measure the angle between the line path of ultrasonic propagation and the central axis of the channel, namely the sound channel angle. The flowmeter uses the sound channel angle as a basic parameter to participate in the calculation of flow velocity, and the measurement deviation of this angle will lead to errors in the flow velocity calculation.

[0003] At present, it is necessary to set up an artificial cofferdam at the location where the flow meter transducer is installed in the channel, and drain the water inside the cofferdam. After installing the transducer on the channel wall, adjust the angle of the transducer's emitting surface with the help of tools such as a laser pen, and lock the emitting surfaces of a pair of transducers after alignment; basic parameters such as the sound channel angle need to be calculated by setting up a theodolite or total station. The above operations cannot be performed for water diversion channels where water delivery cannot be stopped. Even if temporary water outages are allowed, the process of constructing cofferdams in the channel and draining the water inside requires a large investment of manpower and material costs. Summary of the invention

[0004] The technical problem to be solved by the present invention is generally to provide a method and system for the water alignment of a trapezoidal water transfer channel transducer and the calculation of the sound channel angle, thereby providing a method for completing the alignment of a pair of transducer emitting surfaces placed at a specific underwater position on the water, and a method for calculating the angle between the sound channel line and the central axis of the channel.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] In order to realize the completion of the water technology, as a supporting equipment description, a trapezoidal water channel transducer water alignment and sound channel angle calculation system is provided, the system includes ultrasonic flow components respectively arranged on the slope surfaces on the left and right sides; the ultrasonic flow component includes a bracket installed on the slope surface; a transducer adjustment component is arranged on the bracket;

[0007] The transducer adjustment component comprises a support frame body which is laterally arranged on the bracket; a transducer with an adjustable angle is hinged on the support frame body.

[0008] As a further step, in order to realize the free vertical and horizontal angle adjustment of the transducer, T-slots are arranged on the longitudinal ladders on both sides of the bracket; sliders are arranged in the T-slots; fastening bolts are respectively connected between the sliders and both ends of the support frame;

[0009] A rotating shaft is arranged on the support frame; a swing frame is connected between the two rotating shafts; and the transducer can swing horizontally on the swing frame;

[0010] When the swing frame is in a free state, based on the tumbler principle, the transducer is in a vertical state. Of course, it can be automatically adjusted, preferably locked in the vertical position, and then lowered into the water or calculated after considering buoyancy, so that the vertical state can be guaranteed in the water.

[0011] In order to carry out the alignment and calculation on water, a method for aligning the transducer of a trapezoidal water conveyance channel on water and calculating the sound channel angle is provided, with the aid of the above-mentioned system;

[0012] The method comprises the following steps:

[0013] Step 1: Measure and obtain parameter information of the trapezoidal channel section; parameter information includes channel bottom width B , slope ratio of the slope, operating water depth H , installation height of transducer Z ;

[0014] The slope ratio of the slope surface includes the slope ratio of the left side slope and the slope ratio of the right side slope

[0015] D 1 , the slope angle of the left side slope; D 2 , the slope angle of the right side slope;

[0016] Step 2: First, install the transducer adjustment component on the keel of the bracket and slide it up and down; then, according to the pre-designed sound channel height, slide the transducer adjustment component to the set height position and lock it; secondly, place the bracket on the slope, and the transducer adjustment component located on the water will automatically stand upright due to gravity, and the transducer can rotate at a horizontal angle;

[0017] Step 3: Calculate the alignment angle of the transmitting surfaces of the paired transducers on the left and right sides, and adjust the transducer adjustment components above the water surface according to the calculated angle.

[0018] To facilitate angle measurement, in Step 2, during the adjustment process, a universal angle ruler is used as a tool for rotating the transducer to measure the angle, and the transducer is locked after the horizontal angle adjustment is completed.

[0019] Further, in order to realize the angle and length calculation, in step Step 3, the sound channel angle, the horizontal angle of the transducer and the sound channel length are calculated;

[0020] First, based on the channel bottom width in step 1 B , the slope ratio of the left slope , the slope ratio of the right slope , Transducer installation height Z , the vertical distance between the center of the transducer and the trapezoidal channel wall on the same side h , and perform calculations;

[0021] Then, calculate the horizontal distance of the transducer on the left slope relative to the slope of the trapezoidal channel wall on the same side;

[0022] Formula (1);

[0023] Calculate the horizontal distance of the transducer on the right slope relative to the slope of the trapezoidal channel wall on the same side;

[0024] Formula (2);

[0025] Secondly, calculate the width between the emitting surfaces of the left and right transducers b :

[0026] Formula (3);

[0027] Again, according to the axial span distance of the two transducers (6) , calculate the vocal tract angle :

[0028] Formula (4);

[0029] in,

[0030] exist middle, Z 1 Indicates the installation height of the transducer (6) installed on the left slope;

[0031] exist middle, Z 2 Indicates the installation height of the transducer (6) installed on the right slope;

[0032] exist middle, h 1 represents the vertical distance of the transducer (6) installed on the left slope relative to the trapezoidal channel wall on the left slope;

[0033] exist middle,h 2 represents the vertical distance of the transducer (6) installed on the right slope relative to the trapezoidal channel wall on the right slope; then, calculate the horizontal angle of the transducer :

[0034] Formula (5);

[0035] Then, calculate the theoretical sound channel length of the two transducers L :

[0036] Formula (6).

[0037] It is the distance from the horizontal swing axis of the transducer to the end face of the transducer.

[0038] The present invention solves the problem of installing and applying a portable ultrasonic flowmeter in a channel without the need for drainage, and can be applied to trapezoidal channels with different slope ratios. The present invention realizes the installation of a portable ultrasonic flowmeter in a channel in water, which, as a high-precision standard measuring instrument, provides a reliable standard basis for on-site flow calibration of water delivery channels, and can effectively replace the traditional rotor flowmeter method, greatly improving the credibility of on-site flow calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0040] Figure 2 It is a schematic diagram of the structure of the ultrasonic flow assembly of the present invention.

[0041] Figure 3 It is a schematic diagram of the mounting bracket structure of the present invention.

[0042] Figure 4 It is a schematic diagram of the channel cross-section structure of the present invention.

[0043] Figure 5 It is a schematic diagram of the transducer's on-water adjustment and alignment structure of the present invention.

[0044] Figure 6 The present invention Figure 5 Schematic diagram of the structure at A in the middle.

[0045] Figure 7 It is a schematic diagram of calculation of the support frame of the present invention.

[0046] Figure 8 It is a schematic diagram of the angle structure of the transducer sound channel of the present invention.

[0047] Among them: 1. Slope; 2. Ultrasonic flow component; 3. Bracket; 4. Transducer adjustment component; 5. Support frame; 6. Transducer; 7. Rotating shaft; 8. Swinging frame. DETAILED DESCRIPTION

[0048] like Figure 1-Figure 8 In a trapezoidal channel where water is flowing, since it is impossible to directly install the transducer on the slopes on both sides and align it with the emitting surface, the present invention installs the transducer by means of a bracket. According to the relevant information of the channel and the designed transducer installation height, the transducer adjustment component is installed on the bracket, and the angle of the emitting surface is adjusted according to the calculated angle. After the adjustment is completed, the transducer adjustment component is locked, and finally the brackets on both sides are placed underwater as a whole according to the selected position.

[0049] Step 1:

[0050] Measure the parameter information of the trapezoidal channel section; the parameter information includes the channel bottom width B , the slope ratio of the left and right side slopes , , operating water depth H , installation height of transducer Z ;

[0051] D 1 is the slope angle of the left side slope; D 2 is the slope angle of the right side slope;

[0052] Step 2:

[0053] Install the transducer adjustment assembly on the keel of the bracket and allow it to slide freely. According to the designed sound channel height, slide the transducer adjustment assembly to a specific height position and lock it.

[0054] The transducer mounting bracket is placed on the trapezoidal slope. At this time, the transducer adjustment assembly located above the water is automatically vertical due to the effect of gravity, and the transducer 6 can rotate horizontally.

[0055] Step 3:

[0056] Calculate the alignment angle of the emitting surface of the transducer 6, and adjust the transducer adjustment assembly on the slope above the water surface according to the calculated angle. During the adjustment process, use a universal angle ruler as a tool to measure the angle. After the adjustment is completed, lock the transducer;

[0057] In step 3, the channel angle, the horizontal angle of the transducer and the channel length are specifically calculated:

[0058] According to the width of the channel bottom B , the slope ratio of the left slope , the slope ratio of the right slope , Transducer installation height Z, the vertical distance of the transducer 6 relative to the trapezoidal channel wall on the same side h ;

[0059] Calculate the horizontal distance of the left slope transducer 6 relative to the trapezoidal channel wall on the same side

[0060] Formula (1);

[0061] Calculate the horizontal distance of the right slope transducer 6 relative to the trapezoidal channel wall on the same side

[0062] Formula (2);

[0063] Finally, the width between the emitting surfaces at the transducer mounting height is calculated b :

[0064] Formula (3);

[0065] Place the support axial span distance according to the left and right slopes , calculate the vocal tract angle :

[0066] Formula (4);

[0067] From this, the horizontal angle of the transducer is further calculated :

[0068] Formula (5);

[0069] Further calculation of the theoretical vocal tract length L :

[0070] Formula (6).

[0071] is the distance from the horizontal swing axis of the transducer to the end face of the transducer;

[0072] Preferably, the installation height of the two paired transducers 6 on both sides is Z It is theoretically of the same height; for further explanation:

[0073] exist middle, Z 1 Indicates the installation height of the transducer (6) installed on the left slope;

[0074] exist middle, Z 2 Indicates the installation height of the transducer (6) installed on the right slope;

[0075] exist middle, h 1 represents the vertical distance of the transducer (6) installed on the left slope relative to the trapezoidal channel wall on the left slope;

[0076] exist middle, h 2 represents the vertical distance of the transducer (6) installed on the right slope relative to the trapezoidal channel wall on the right slope;

[0077] like Figure 1-Figure 8 As shown, in order to implement the above method, the trapezoidal water channel transducer water alignment and sound channel angle calculation system of this embodiment includes an ultrasonic flow component 2 arranged on a slope 1; the ultrasonic flow component 2 includes a bracket 3 installed on the slope 1, which is a trapezoidal structure for support; a transducer adjustment component 4 is arranged on the bracket 3;

[0078] The transducer adjustment assembly 4 includes a support frame 5 which is laterally arranged on the bracket 3 and may be a U-shaped structure; a transducer 6 with an adjustable angle is hinged on the support frame 5 .

[0079] In order to achieve up and down adjustment, T-slots are respectively arranged on the longitudinal ladders on both sides of the bracket 3; sliders are arranged in the T-slots; fastening bolts are respectively connected between the sliders and the corresponding ends of the support frame 5; of course, other track and slider structures can be used, and the fastening can be fasteners such as eccentric wheels and wedges.

[0080] A rotating shaft 7 is provided on the support frame 5, which can be a rotating shaft or a bearing support; a swing frame 8 is connected between the two rotating shafts 7; the transducer 6 can swing horizontally on the swing frame 8 and can be locked in position, and the locking method can be a common structure such as a top screw or a pressure block;

[0081] The swing frame 8 is in a free state and the transducer 6 is in a vertical state.

[0082] The present invention is fully described for a clearer disclosure, and the prior art is not listed one by one.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents; it is obvious for those skilled in the art to combine multiple technical solutions of the present invention. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims

1. A method for aligning a trapezoidal water channel transducer on water and calculating the sound channel angle, characterized in that: The method relies on the system; The system comprises ultrasonic flow components (2) respectively arranged on the slope surfaces (1) on the left and right sides; the ultrasonic flow component (2) comprises a bracket (3) mounted on the slope surface (1); a transducer adjustment component (4) is arranged on the bracket (3); The transducer adjustment assembly (4) comprises a support frame (5) arranged transversely on the bracket (3); a transducer (6) with an adjustable angle is hingedly connected to the support frame (5); T-shaped slots are respectively arranged on the longitudinal ladders on both sides of the bracket (3); a sliding block is arranged in the T-shaped slot; and fastening bolts are respectively connected between the sliding block and the corresponding ends of the support frame body (5); A rotating shaft portion (7) is provided on the support frame (5); a swing frame (8) is connected between the two rotating shaft portions (7); the transducer (6) can swing horizontally on the swing frame (8) and can be locked in position; The swing frame (8) is in a free state, and the transducer (6) is in a vertical state; The method comprises the following steps: Step 1: Measure and obtain parameter information of the trapezoidal channel section; parameter information includes channel bottom width B , slope ratio of slope (1), operating water depth H , installation height of transducer Z ; The slope ratio of the slope surface (1) includes the slope ratio of the left side slope and the slope ratio of the right side slope ; Where D1 is the slope angle of the left side slope; D2 is the slope angle of the right side slope; Step 2: First, the transducer adjustment assembly (4) is mounted on the keel of the bracket (3) and slid up and down; then, according to the pre-designed sound channel height, the transducer adjustment assembly (4) is slid to a set height position and locked; secondly, the bracket (3) is placed on the slope (1), and the transducer adjustment assembly (4) located on the water is automatically upright due to gravity, and the transducer (6) can be rotated at a horizontal angle; Step 3: Calculate the angle of alignment of the emitting surfaces of the paired transducers (6) on the left and right sides, and adjust the transducer adjustment component (4) above the water surface according to the calculated angle.

2. The method for aligning the transducer of a trapezoidal water channel and calculating the sound channel angle on water according to claim 1, characterized in that: In step 2, during the adjustment process, a universal angle ruler is used as a tool for rotating the transducer (6) to measure the angle, and the transducer (6) is locked after the horizontal angle adjustment is completed.

3. The method for aligning the transducer of a trapezoidal water channel and calculating the sound channel angle on water according to claim 1, characterized in that: In step Step 3, the sound channel angle, the horizontal angle of the transducer (6) and the sound channel length are calculated; First, based on the channel bottom width in step 1 B , the slope ratio of the left slope , the slope ratio of the right slope , Installation height of transducer (6) Z , the vertical distance between the center of the transducer (6) and the trapezoidal channel wall on the same side h , and perform calculations; Then, the horizontal distance of the transducer (6) on the left slope relative to the slope surface (1) of the trapezoidal channel wall on the same side is calculated; Formula (1): Calculate the horizontal distance of the transducer (6) on the right slope relative to the slope surface (1) of the trapezoidal channel wall on the same side; Formula (2): Secondly, calculate the width between the emitting surfaces of the left and right transducers (6) b : Formula (3): Again, according to the axial span distance of the two transducers (6) , calculate the vocal tract angle : Formula (4): in, exist middle, Z 1 Indicates the installation height of the transducer (6) installed on the left slope; exist middle, Z 2 Indicates the installation height of the transducer (6) installed on the right slope; exist middle, h 1 represents the vertical distance of the transducer (6) installed on the left slope relative to the trapezoidal channel wall on the left slope; exist middle, h 2 represents the vertical distance of the transducer (6) installed on the right slope relative to the trapezoidal channel wall on the right slope; After that, the horizontal angle of the transducer (6) is calculated : Formula (5): Then, calculate the theoretical sound path length of the two transducers (6) L : Formula (6): It is the distance from the horizontal swing axis of the transducer to the end face of the transducer.

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