CN102322980A - Ultrasonic heat meter body and method for determining position parameters of three-dimensional reflection surfaces of ultrasonic heat meter body - Google Patents

Ultrasonic heat meter body and method for determining position parameters of three-dimensional reflection surfaces of ultrasonic heat meter body Download PDF

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CN102322980A
CN102322980A CN 201110257689 CN201110257689A CN102322980A CN 102322980 A CN102322980 A CN 102322980A CN 201110257689 CN201110257689 CN 201110257689 CN 201110257689 A CN201110257689 A CN 201110257689A CN 102322980 A CN102322980 A CN 102322980A
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reflection
ultrasonic
surface
wall
heat
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CN 201110257689
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CN102322980B (en )
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张宪伟
李书锋
李宁宁
王兴海
王杰礼
陶涛
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山东贝特智联表计有限公司
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Abstract

The invention relates to the technical field of ultrasonic heat meter structures, in particular to a time difference method ultrasonic heat meter body of a three-dimensional multi-reflection sound track and a method for determining position parameters of three-dimensional reflection surfaces of the time difference method ultrasonic heat meter body. The time difference method ultrasonic heat meterbody is characterized in that a measurement pipe is a square pipe, two three-dimensional reflection surface with positions respectively corresponding to two transducers are arranged on the inner wallof the bottom surface of the measurement pipe, reflection wall surfaces are respectively arranged on the inner walls of two lateral surfaces and the inner wall of the top surface of the measurement pipe, so that ultrasonic transmitted by the transducer used for transmitting ultrasonic sequentially is reflected by the three-dimensional reflection surface, the reflection wall surface on the lateralwall, the reflection wall surface on the top wall, the reflection wall surface on the other lateral wall and the other three-dimensional reflection surface and then enters into the transducer used for receiving the ultrasonic. Compared with the prior art, the invention can realize that the ultrasonic scans all fluid circulating space in the square pipe in an omnibearing manner and flow and heat with higher precision can be measured without modifying flowing velocity distribution and temperature change.

Description

超声波热量表表体及其三维反射面位置参数的确定方法 The method of determining the three-dimensional ultrasonic heat meter and the meter body surface of the reflector position parameter

技术领域 FIELD

[0001] 本发明涉及超声波热量表结构技术领域,具体地说是一种三维多反射声道的时差法超声波热量表表体及其三维反射面位置参数的确定方法。 [0001] The present invention relates to a technical field structure ultrasonic heat meter, in particular a method for determining the three-dimensional multi-channel reflected ultrasonic heat meter and meter body surface position of the three-dimensional parameter reflecting the time difference method.

背景技术 Background technique

[0002] 时差法超声波热量表是目前应用最广泛的超声波热量表之一,其工作原理是: 安装在流体管道同侧或两侧的超声波换能器交替发射和接收流体中声波信号,按一定的声波路径传播,测量顺逆流声波传播的时间差,经二次仪表数学运算后得出流量值及热量值。 [0002] Time Ultrasonic heat meter is currently the most widely used ultrasonic heat meter, its working principle is: the ultrasonic fluid conduit mounted on the same side or both sides of the transducers alternately transmit and receive acoustic signals in a fluid, according to a certain the acoustic propagation time difference measure of acoustic wave propagation along countercurrent, mathematical operation after secondary instrument and the calorific value derived flow value. 基于时差法测量出的是超声波声道上流体的线平均速度,它不能作为管道截面积上的面平均流速来计算流体的流量,必须在计算流量时,利用流速分布修正系数K对声道上的线平均流速进行修正。 Based on the measured time difference method is a fluid channel of the ultrasonic line-average velocity, it can not be calculated as a flow of fluid on the surface of the pipe average flow cross-sectional area, the flow rate must be calculated when using the correction coefficient K on the flow velocity distribution channel the average flow rate correction line. K系数为超声波声道上流体线平均流速与管道横截面上的流体面平均流速的比值,而K系数与超声波传播声道的设置方式及流体雷诺数和温度的变化有关。 K-factor is the ratio of the average flow rate the average flow velocity of the fluid line and the fluid conduit on the surface of the cross section of the ultrasound channel, changes arrangement of the ultrasonic propagation channel factor K and the Reynolds number and the temperature concerned.

[0003] 现有市场的热量表多采用单声道传播方式,换能器的安装位置和声波传播路径一般采用平行式、Z型、V型及W型,这四种换能器安装位置所形成均是经过管道轴线的声程, 均需要根据流体雷诺数和温度的变化进行K系数的修正补偿,否则难于实现在流量和温度较大变化范围内流量值及热量值的合格测量精度,尤其小流量下的测量精度更低,不能达到产品标准的要求,严重时甚至无法正常使用。 Calorimeter [0003] using the conventional multi-market mono mode of transmission, the position transducer mounting and use of acoustic wave propagation paths parallel to the general formula, Z-type, V-type and W-type, four transducers are mounted positions sound path are formed through the conduit axis, need be corrected according to a change in the compensation coefficient K and the temperature of the Reynolds number, otherwise difficult to realize in qualifying the measurement accuracy over a wide temperature range, and flow rate and the calorific value of the flow rate value, in particular lower measurement accuracy at low flow, can not meet the requirements of product standards, serious and even not work properly.

发明内容 SUMMARY

[0004] 本发明的目的是为克服上述现有技术的不足,提出一种三维多反射声道超声波热量表体及其三维反射面位置参数的确定方法,用于实现无需进行流速分布系数K值和温度变化的修正补偿,即可在较大流量和温度变化范围内通过二次仪表对时差法进行数学运算,获得流量值及热量值较高的测量精度的目的。 [0004] The object of the present invention is to overcome the above deficiencies of the prior art, a method for determining the three-dimensional multi-channel ultrasonic heat meter reflective member reflecting surface and three-dimensional positional parameters proposed for achieving without velocity distribution coefficient value K to compensate for temperature variations and modifications, can be carried out over a wide temperature range and flow rate through the secondary instrument of mathematical difference method to obtain the flow rate value and the calorific value of the object of high accuracy.

[0005] 本发明的技术措施是: [0005] The technical measure of the invention is:

一种超声波热量表表体,包括一用于进行流量测量的水平放置的测量管,以及分别用于向测量管内流动液体发射或接收超声波的两个换能器,其中两个换能器固定在测量管管体顶部的管壁上,其特征在于所述测量管为方形管道,测量管底面内壁上设有两个位置分别与两个换能器相对应的三维反射面,测量管的两个侧面内壁以及顶面内壁上分别设有一个反射壁面,使用于发射超声波的换能器发射的超声波依次经过三维反射面、侧壁反射壁面、顶壁反射壁面、另一侧壁反射壁面、另一三维发射面的反射后进入用于接收超声波的换能器。 An ultrasonic meter body heat meter comprising a flow measurement for measurement of horizontally disposed tubes, respectively, and two transducers for transmitting to the measuring tube or receiving ultrasonic waves in a liquid flow, wherein the two transducer mounting on the top wall of the measuring tube body, characterized in that the measuring tube is a square pipe, is provided with three reflection surfaces two positions respectively corresponding to the two transducers on the bottom surface of the inner wall of the measuring tube, two measuring tubes a reflector are provided on the inner side wall and a top wall surface of the inner wall, using an ultrasonic transducer for emitting ultrasonic waves emitted sequentially through a three-dimensional reflective surface, the reflective side wall wall, a top wall surface of the reflector wall, the other side wall reflection wall surface, another after entering the reflective three-dimensional surface emitting transducer for receiving ultrasonic waves.

[0006] 本发明通过上述结构,即在方形管道流量测量管的下部,采用由三维坐标设置的相对于发射或接收换能器的两个三维反射面,其与流动方向的左侧、右侧及上部的三个充分光滑反射壁面,构成三维空间多次反射声道,此声道可使超声波换能器发射或接收的超声波信号,由传统单声道经过管道轴线的传播声程发展到多维面传播声程,实现超声波全方位扫描方形管道内流体全部流通空间,从而减少流速分布的畸变影响,无需进行流量分则用点法式获得表示三维反射面4的空间平面方程,即将A,B,C代入下式(1)中: [0006] By the above construction of the present invention, i.e. in a lower flow rate measurement tube square pipe, by using three-dimensional coordinates relative to the set transmit or receive two-dimensional reflecting surfaces of the transducer, the flow direction of the left side, right side three reflection sufficiently smooth wall surface and an upper portion, constituting the three-dimensional space the multiple reflections channel, this channel causes the ultrasonic transducer ultrasonic signals transmitted or received by a conventional mono sound propagating through the pipe axis to drive the development of multi-dimensional surface acoustic propagation path, all fluid flow space to achieve the full-scan ultrasound square pipe, thereby reducing the distortion influence of the flow velocity distribution, the flow points are obtained without the plane equation indicates the three-dimensional space with the point of the reflecting surface 4 French, i.e. a, B, C into the following equation (1):

Figure CN102322980AD00051

求得三维反射面空间平面方程的数学模型为: Obtain a three-dimensional mathematical model of the space plane reflecting surface equation is:

步骤2 :根据所得数学模型,计算该三维反射面法线的各方向角度数,即可确定该三维反射面的位置参数: Step 2: The resulting mathematical model to calculate the number of the reflection angle of each direction of the three-dimensional surface normal, to determine the position of the three-dimensional parameter reflecting surface:

三维反射面4法线ON的方向余弦为: 4 a three-dimensional reflective surface direction cosines of the normal to ON:

Figure CN102322980AD00052

布系数K值和温度变化的修正,即可在较大流量和温度变化范围内,经过二次仪表对时间差数学运算,获得流量值及热量值较高的测量精度。 Cloth correction coefficient K values ​​and temperature changes, and the flow rate can be in a wide temperature range, after the second time difference meter mathematical operation to obtain a high accuracy values ​​and heat flow values.

[0007] —种三维多反射声道超声波热量表表体的三维反射面位置参数的确定方法,其特征在于包括以下步骤; [0007] - Determination of the three-dimensional surface of a three-dimensional multi-reflector position parameter channel reflected ultrasonic heat meter the meter body types, characterized by comprising the steps of;

步骤1 :建立三维反射面空间平面方程的数学模型,以方形管道中用于发射或接收超声波的换能器的超声波中心声道和位置与该换能器相对应的三维反射面的交点为原点0 (Xtl, Y0, Z0),以该换能器的发射或接收声道线与其反射声道线的夹角的角平分线ON为该三维反射面的法线,设N点的坐标为N(A、B、C),则N(A、B、C)点为法线ON与流体流向方向的左侧反射壁面的交点。 Step 1: the ultrasonic center, and the intersection position of the three-dimensional mathematical model of the reflecting surface plane equation of the space, a square pipe for transmitting or receiving an ultrasonic wave transducer with the transducer corresponding to the three-dimensional reflection surface as the origin 0 (Xtl, Y0, Z0), the angle to the transducer cable channel transmitting or receiving channel and its reflection angle bisector line for the normal ON dimensional reflection surface, provided the coordinates of the point N N (a, B, C), then N (a, B, C) point of intersection of the left side wall surface reflecting the normal fluid flow direction is ON.

[0008] 设L为发射或接收换能器的中心距,M和N分别为矩形管道横截面边长,即M=N ,且三维反射面4通过三维直角坐标系原点0 (Xtl, Ytl, 4),其法线ON的方向数为: [0008] Let L be the center of transmission or reception transducer pitch, M and N are rectangular duct cross-sectional length, i.e., M = N, and the three dimensional reflecting surface 4 through the three-dimensional Cartesian coordinate system origin 0 (Xtl, Ytl, 4), the number of directions of normals ON:

Figure CN102322980AD00053
Figure CN102322980AD00061

式(3)、(4)、(5)中的夹角a、b、c ,分别为所求三维反射面的法线ON与三维坐标X、 Y、Z轴的夹角,称之为ON的方向角, Of formula (3), (4), the angle (5) of a, b, c, respectively, a three-dimensional reflective surface is required and the normal ON dimensional coordinates X, Y, Z axis angle, called ON angular direction,

由上述公式(2)、(3)、(4)、(5)即可确定三维多反射声道的两个三维反射面的位置参数。 From the above equation (2), (3), (4), (5) to determine the position of two-dimensional parameter reflecting surface of the reflective three-dimensional multi-channel.

[0009] 本发明中由多反射面形成的多反射声道传播路径,是通过方形管道测量管的截面边长和发射或接收超声波换能器的中心距参数确定的,在使用过程中,需要先通过不同流量下的实验数据确定方形管道的截面边长和两个换能器的中心距,然后将测得的参数按上述算法进行运算,获得最终值。 [0009] Multi-channel reflection in the propagation paths formed by the present invention, a multi-reflecting surface by a rectangular cross section measuring tube conduit sides and transmitting or receiving the ultrasonic transducer parameters determined center distance, during use, it is necessary first determine the square pipe experimental data under different flow cross-section two sides and the center distance transducers, and then calculates the measured parameter according to the algorithm described above, to obtain the final value.

[0010] 本发明采用一种三维多反射声道的超声波热量表表体及其三维反射面位置参数的确定方法,与传统单声道超声波经过管道轴线的传播路径相比,可实现超声波全方位扫描方形管道内流体全部流通空间,能够在较大流量和温度变化范围内,即在量程比25 :1情况下以及20°C至85°C温度变化范围内,经CFD仿真和测试表明,流量值及热量值的测量精度可达到1%。 Determination [0010] The present invention employs a three-channel multi-reflection of ultrasonic heat meter and meter body surface of a three-dimensional reflection location parameters, as compared with the conventional mono ultrasonic wave propagation path through the pipe axis, the ultrasound can be achieved full all the scanning line fluid flow rectangular space, and the flow rate can be in a wide temperature range, i.e. in the range of ratio 25: 1 as well as 20 ° C to 85 ° C within the temperature range by CFD simulations and tests show that the flow rate measurement precision values ​​and the calorific value of up to 1%.

[0011] 附图说明: [0011] BRIEF DESCRIPTION OF DRAWINGS:

附图1是本发明的正视图。 1 is a front view of the invention.

[0012] 附图2是本发明的左视图。 [0012] Figure 2 is a left side view of the invention.

[0013] 附图3是本发明的俯视图。 [0013] Figure 3 is a top plan view of the invention.

[0014] 附图标记:测量管1、换能器2、换能器3、三维反射面4、三维反射面5、反射壁面6、 反射壁面7、反射壁面8。 [0014] reference numerals: the measuring tube 1, transducer 2, a transducer 3, a three-dimensional reflective surface 4, a three-dimensional reflective surface 5, the reflecting wall 6, a reflective wall 7, 8 reflective wall.

[0015] 具体实施方式: [0015] DETAILED DESCRIPTION:

下面结合附图对本发明作进一步的说明: 本发明提出了一种三维多反射声道的超声波热量表表体,包括方型管道流量测量管1, 用于发射超声波的换能器2、用于接收超声波的换能器3,其中方形测量管1底面内壁测量管底面内壁上设有两个位置分别与两个换能器相对应的表面光滑的三维反射面4以及三维反射面5,测量管1的两个侧面内壁以及顶面内壁上分别设有光滑的反射壁面6、反射壁面7、反射壁面8,使用于发射超声波的换能器2发射的超声波依次经过三维反射面4、侧壁的反射壁面6、顶壁的反射壁面8、另一侧壁的反射壁面7、另一三维反射面5的反射后进入用于接收超声波的换能器3。 DRAWINGS The present invention is further described: The present invention provides a three-dimensional multi-channel reflected ultrasonic heat meter to the meter body transducer 2 comprises a square pipe flow measurement tube 1, for transmitting ultrasonic waves, for receiving ultrasonic transducers 3, wherein the two positions are provided with two transducers corresponding to the smooth surface of the three dimensional reflecting surface 4 and a reflecting surface 5 on the bottom surface of the inner walls of the measurement tube 1 square bottom surface of the measuring tube, the measuring tube the two sides are respectively provided with a smooth reflecting on the inner wall and the top wall surface of inner wall 6, a reflective wall 7, the reflective wall 8, using ultrasonic waves emitted from 2 to emit ultrasonic transducers sequentially through a three-dimensional reflective surface 4, the side walls reflecting wall 6, the reflective wall 8 of the top wall, the other side wall of the reflective wall 7, the other three-dimensional back reflector reflecting surface 5 for receiving the ultrasonic wave enters the transducer 3.

[0016] 本发明中所述三维反射面4以及三维反射面5是固定在方形管道内底面上的轮廓线为椭圆形的空间平面。 [0016] In the present invention, the three dimensional reflecting surface 4 and a reflecting surface 5 is fixed to the inner contour of the bottom surface of the square pipe elliptical spatial plane.

[0017] 本发明在方形流量测量管1的下部,采用由三维坐标设置的相对于发射或接收换能器的两个三维反射面,其与流动方向的左侧、右侧及上部的三个光滑的反射壁面,构成三维空间多次反射声道,此声道可使超声波换能器发射或接收的超声波信号,由传统单声道经过管道轴线的传播发展到多维面传播声程,实现超声波全方位扫描方形管道内流体全部流通空间,从而减少流速分布的畸变影响,无需进行流量分布系数K值和温度变化的修正,即可在较大流量和温度变化范围内,经二次仪表对时间差数学运算,获得流量值及热量值较高的测量精度。 [0017] In the present invention, a lower portion of the square tube of the flow rate measurement, using three-dimensional coordinates set by a phase for transmitting or receiving two-dimensional transducer reflecting surfaces, three of which left the flow direction, and the upper right side of smooth reflecting wall surface, constituting the three-dimensional multiple reflection channel, this channel causes the ultrasonic transducer ultrasonic signals transmitted or received by a conventional mono propagation through the conduit axis for propagation of the development of multi-dimensional sound path to achieve ultrasonic a full-scanning the entire square pipe fluid flowing space, thereby reducing the distortion influence of the flow velocity distribution, the flow rate distribution without correction coefficient K values ​​and temperature changes, and the flow rate can be in a wide temperature range, by the second time difference meter mathematical operation, and the flow value to obtain a higher calorific value measurement accuracy.

[0018] 本发明还提出了一种三维反射面位置参数的确定方法,其特征在于包括以下步骤·' [0018] The present invention also provides a method of determining the position of a three-dimensional parameter reflecting surface, comprising the steps of · '

步骤1 :建立三维反射面空间平面方程的数学模型,以方形管道中用于发射或接收超声波的换能器的超声波中心声道和位置与该换能器相对应的三维反射面的交点为原点0 Utl,Y0, Z0),以该换能器的发射或接收声道线与其反射声道线的夹角的角平分线ON为该三维反射面的法线,设N点的坐标为N(A、B、C),则N(A、B、C)点为法线ON与流体流向方向的左侧反射壁面的交点。 Step 1: the ultrasonic center, and the intersection position of the three-dimensional mathematical model of the reflecting surface plane equation of the space, a square pipe for transmitting or receiving an ultrasonic wave transducer with the transducer corresponding to the three-dimensional reflection surface as the origin 0 Utl, Y0, Z0), the angle to the transducer cable channel transmitting or receiving channel and its reflection angle bisector line for the normal ON dimensional reflection surface, provided the coordinates of the point N is N ( a, B, C), then N (a, B, C) point of intersection of the left side wall surface reflecting the normal fluid flow direction is ON.

[0019] 设L为发射或接收换能器的中心距,M和N分别为矩形管道横截面边长,即M=N ,且三维反射面4通过三维直角坐标系原点0 (Xtl, Ytl, 4),其法线ON的方向数为: [0019] Let L be the center of transmission or reception transducer pitch, M and N are rectangular duct cross-sectional length, i.e., M = N, and the three dimensional reflecting surface 4 through the three-dimensional Cartesian coordinate system origin 0 (Xtl, Ytl, 4), the number of directions of normals ON:

Figure CN102322980AD00071

则用点法式获得表示三维反射面4的空间平面方程,即将A,B,C代入下式(1)中: French dot represents the obtained three-dimensional space of the reflecting surface plane equation 4, i.e. A, B, C into the following equation (1):

Figure CN102322980AD00072

(A,B,C 不同时等于零)-------(1) (A, B, C are not simultaneously equal to zero) ------- (1)

求得三维反射面空间平面方程的数学模型为: Obtain a three-dimensional mathematical model of the space plane reflecting surface equation is:

Figure CN102322980AD00073

步骤2 :根据所得数学模型,计算该三维反射面法线的各方向角度数,即可确定该三维反射面的位置参数: Step 2: The resulting mathematical model to calculate the number of the reflection angle of each direction of the three-dimensional surface normal, to determine the position of the three-dimensional parameter reflecting surface:

三维反射面4法线ON的方向余弦为: 4 a three-dimensional reflective surface direction cosines of the normal to ON:

Figure CN102322980AD00081

式(3)、(4)、(5)中的夹角a、b、c ,分别为所求三维反射面的法线ON与三维坐标X、 Y、Z轴的夹角,称之为ON的方向角, Of formula (3), (4), the angle (5) of a, b, c, respectively, a three-dimensional reflective surface is required and the normal ON dimensional coordinates X, Y, Z axis angle, called ON angular direction,

由上述公式(2)、(3)、(4)、(5)即可确定三维多反射声道的两个三维反射面的位置参数。 From the above equation (2), (3), (4), (5) to determine the position of two-dimensional parameter reflecting surface of the reflective three-dimensional multi-channel.

[0020] 本发明中由多反射面形成的多反射声道传播路径,是通过方形管道测量管的截面边长和发射或接收超声波换能器的中心距参数确定的,在使用过程中,需要先通过不同流量下的实验数据确定方形管道的截面边长和两个换能器的中心距,然后将测得的参数按上述算法进行运算,获得最终值。 [0020] Multi-channel reflection in the propagation paths formed by the present invention, a multi-reflecting surface by a rectangular cross section measuring tube conduit sides and transmitting or receiving the ultrasonic transducer parameters determined center distance, during use, it is necessary first determine the square pipe experimental data under different flow cross-section two sides and the center distance transducers, and then calculates the measured parameter according to the algorithm described above, to obtain the final value.

[0021] 本发明采用一种三维多反射声道的超声波热量表表体及其三维反射面位置参数的确定方法,与传统单声道超声波传播路径相比,可实现超声波全方位扫描方形管道内流体全部流通空间,能够在较大流量和温度变化范围内,即在量程比25 情况下以及20°C至85°C温度变化范围内,经CFD仿真和测试表明,流量值及热量值的测量精度可达到1%。 Determination [0021] The present invention employs a three-channel multi-reflection of ultrasonic heat meter and meter body surface of a three-dimensional reflection location parameters, as compared with the conventional mono ultrasonic propagation path, may be implemented within the ultrasound scanning full square pipe all fluid circulation space, and the flow rate can be in a wide temperature range, i.e. the range in the ratio 25 to 20 ° C as well as the 85 ° C temperature range by CFD simulations and tests show that measured flow rate value and the calorific value accurate to 1%.

Claims (2)

  1. 1. 一种超声波热量表表体,包括一用于进行流量测量的水平放置的测量管,以及分别用于向测量管内流动液体发射或接收超声波的两个换能器,其中两个换能器固定在测量管管体顶部的管壁上,其特征在于所述测量管为方形管道,测量管底面内壁上设有两个位置分别与两个换能器相对应的三维反射面,测量管的两个侧面内壁以及顶面内壁上分别设有一个反射壁面,使用于发射超声波的换能器发射的超声波依次经过三维反射面、侧壁反射壁面、顶壁反射壁面、另一侧壁反射壁面、另一三维发射面的反射后进入用于接收超声波的换能器。 An ultrasonic meter body heat meters, comprising a horizontally disposed for measuring the flow measurement tube, respectively, and two transducers for transmitting or receiving ultrasonic waves into the measuring fluid flow tube, wherein two transducers fixed on the measuring tube wall at the top of the body, wherein the measuring tube is a square duct, the measuring tube is provided with three reflection surfaces two positions respectively corresponding to the two transducers on the bottom surface of the inner wall of the measuring tube two sides are respectively provided with a reflector on the inner wall and the top wall surface of the inner wall, using an ultrasonic transducer for emitting ultrasonic waves emitted sequentially through a three-dimensional reflective surface, the reflective side wall wall, a top wall surface of the reflector wall, the other side wall reflection wall surface, after another three-dimensional emission surface reflected enters the transducer for receiving ultrasonic waves.
  2. 2. 一种根据权利要求1所述的超声波热量表表体的三维反射面位置参数的确定方法, 其特征在于包括以下步骤;步骤1 :建立三维反射面空间平面方程的数学模型,以方形管道中用于发射或接收超声波的换能器的超声波中心声道和位置与该换能器相对应的三维反射面的交点为原点0 Utl,Y0, Z0),以该换能器的发射或接收声道线与其反射声道线的夹角的角平分线ON为该三维反射面的法线,设N点的坐标为N(A、B、C),则N(A、B、C)点为法线ON与流体流向方向的左侧反射壁面的交点,设L为发射或接收换能器的中心距,M和N分别为矩形管道横截面边长,即 A method of determining the three-dimensional position of the reflecting surface of the ultrasonic heat meter parameter table body according to claim 1, characterized in that it comprises the following steps; Step 1: establishing a three-dimensional mathematical model of the plane equation reflective surface space, a square pipe a transducer for transmitting or receiving ultrasonic waves and an ultrasonic position of intersection of the center channel of the transducer corresponding to the three-dimensional reflective surface is the origin 0 Utl, Y0, Z0), the transducer to transmit or receive its reflection angle channel line channel ON bisector line for the three-dimensional reflection surface normal line, coordinates of the point set N N (a, B, C), then N (a, B, C) point the intersection of the left wall reflection normal fluid flow direction is ON, let L as the center transmission or reception from the transducer, M, and N are rectangular duct cross-sectional length, i.e.,
    Figure CN102322980AC00021
    M=N ,且三维反射面4通过三维直角坐标系原点0 (Xtl, Ytl, 4),其法线ON的方向数为:则用点法式获得表示三维反射面4的空间平面方程,即将A,B,C代入下式(1)中:A (X-X0) +B (Y-Y0) +C (Z-Z0) =0 (A,B,C 不同时等于零)-------(1)求得三维反射面空间平面方程的数学模型为: M = N, and the three dimensional reflecting surface 4 through the three-dimensional Cartesian coordinate system origin 0 (Xtl, Ytl, 4), the number of directions of normals ON: plane equation is obtained showing the three-dimensional space with the point of the reflecting surface 4 French, i.e. A , B, C are substituted into the formula (1): A (X-X0) + B (Y-Y0) + C (Z-Z0) = 0 (A, B, C are not simultaneously equal to zero) ------ - a mathematical model (1) to obtain a three-dimensional space of the reflecting surface is a plane equation:
    Figure CN102322980AC00022
    步骤2 :根据所得数学模型,计算该三维反射面法线的各方向角度数,即可确定该三维反射面的位置参数:三维反射面4法线ON的方向余弦为: Step 2: The resulting mathematical model to calculate the number of degrees in each direction of the three-dimensional reflection surface normal, to determine the position of the three-dimensional reflection surface parameters: direction cosine normal three-dimensional reflective surface 4 is ON:
    Figure CN102322980AC00031
    式(3)、(4)、(5)中的夹角a、b、c ,分别为所求三维反射面的法线ON与三维坐标X、 Y、Z轴的夹角,称之为ON的方向角,由上述公式(2)、(3)、(4)、(5)即可确定三维多反射声道的两个三维反射面的位置参数。 Of formula (3), (4), the angle (5) of a, b, c, respectively, a three-dimensional reflective surface is required and the normal ON dimensional coordinates X, Y, Z axis angle, called ON directional angle, from the above equation (2), (3), (4), (5) to determine the position of two-dimensional parameter reflecting surface of the reflective three-dimensional multi-channel.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1136844A (en) * 1993-10-25 1996-11-27 西门子公司 Flow measurement device
US6186949B1 (en) * 1998-03-31 2001-02-13 General Electric Company Method and apparatus for three-dimensional flow imaging using coded excitation
CN201210067Y (en) * 2008-05-08 2009-03-18 思 申 Ultrasonic measurement construction for gas flow in tube with small diameter
JP2009139140A (en) * 2007-12-04 2009-06-25 National Maritime Research Institute Flow rate measuring apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1136844A (en) * 1993-10-25 1996-11-27 西门子公司 Flow measurement device
US6186949B1 (en) * 1998-03-31 2001-02-13 General Electric Company Method and apparatus for three-dimensional flow imaging using coded excitation
JP2009139140A (en) * 2007-12-04 2009-06-25 National Maritime Research Institute Flow rate measuring apparatus
CN201210067Y (en) * 2008-05-08 2009-03-18 思 申 Ultrasonic measurement construction for gas flow in tube with small diameter

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