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Tetrahedral ultrasonic wind sensor and measuring method thereof

A tetrahedral, ultrasonic wind technology, applied in the direction of fluid velocity measurement, measurement device, velocity/acceleration/shock measurement, etc., can solve the problems of invalid measurement results, unusable, increase the difficulty of calculation, etc., to simplify the sensor structure, reduce Cost and failure rate, effect of good surface divergence

Inactive Publication Date: 2010-08-25
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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AI Technical Summary

Problems solved by technology

[0003] There are several disadvantages in the ultrasonic wind sensor based on this structure. First, it must use six ultrasonic probes, which increases the cost and the complexity of the structure on the one hand.
On the other hand, the failure rate is higher
As long as any one of the probes fails, the measurement result is invalid and the sensor is damaged and cannot be used
[0004] In addition, since the three measurement paths are neither in the horizontal direction nor in the vertical direction, it is necessary to obtain the X, Y, and Z three-axis components in the standard coordinate system (the three-dimensional Cartesian coordinate system in which the XY-plane is parallel to the horizontal plane), It must go through complex spatial geometry operations and increase the difficulty of calculation

Method used

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  • Tetrahedral ultrasonic wind sensor and measuring method thereof
  • Tetrahedral ultrasonic wind sensor and measuring method thereof
  • Tetrahedral ultrasonic wind sensor and measuring method thereof

Examples

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Effect test

Embodiment 1

[0029] Embodiment 1 takes the regular tetrahedron as an example

[0030] The four ultrasonic probes 1 are arranged at the vertices of the regular tetrahedron, that is, the tetrahedron 8 defined by the center point 7 of the bottom surface of the scattering cover 6 of the four ultrasonic probes 1 is a regular tetrahedron. A regular tetrahedron means that the four sides of the tetrahedron are regular triangles, the six sides are equal, and the angles between all vertices are 60 degrees. As shown in Figure 4, keep a side level, take it as the XY-plane, take a vertex in the plane as the origin O, take a horizontal path starting from the origin O as the X axis, and establish standard coordinates according to the method described in the present invention Tie. The regular tetrahedron has good spatial symmetry, and the included angles of its paths are equal, so when calculating the two-dimensional wind speed, three-dimensional wind speed, and X, Y, Z three-axis wind speed components i...

Embodiment 2

[0031] Embodiment 2 takes the right-angled tetrahedron as an example

[0032] The four ultrasonic probes 1 are arranged at the vertices of the right-angled tetrahedron, that is, the tetrahedron 8 determined by the center point 7 of the bottom surface of the scattering cover 6 of the four ultrasonic probes 1 is a right-angled tetrahedron. A right-angled tetrahedron is a tetrahedron with a right-angled vertex, and three right-angled sides containing the right-angled vertex are perpendicular to each other. Therefore, take a right-angled side as the XY-plane, take the right-angled vertex as the origin O, take a right-angled side starting from the origin O as the X-axis, and the other two right-angled sides as the Y-axis and Z-axis to establish a standard coordinate system. As shown in Figure 4, the three measurement paths a, b, and c starting from the origin coincide exactly with the X, Y, and Z axes of the standard coordinate system. According to the measurement method of the pr...

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Abstract

The invention relates to a tetrahedral ultrasonic wind sensor and a measuring method thereof. The sensor comprises ultrasonic probes arranged on a support and a base, a bracket arranged between the support and the base and a control chamber positioned below the base. The invention is characterized in that one probe is vertically arranged on the support or the base, and three probes are arranged on the base or the support, and the four center points at the top end surfaces of the four ultrasonic probes are four vertexes of the space tetrahedron; or one ultrasonic probe is vertically arranged on the base, and three ultrasonic probes are arranged on the support. The measuring method comprises the following steps: determining wind speed measuring paths between every two of the four probes, using wind speed components on two paths in the horizontal plane to synthesize a two-dimensional wind speed, and then using the two-dimensional wind speed and out-of-plane wind speed components to synthesize a three-dimensional wind speed vector. By reducing the number of the probes from six to four, the invention simplifies the structure and reduces the cost and the failure rate; and besides, the number of the measuring paths is increased from three to six, thereby simplifying the complexity of wind speed calculation.

Description

technical field [0001] The invention relates to a measuring device for a natural wind field, in particular to a tetrahedral structure ultrasonic wind sensor and a measuring method thereof. Background technique [0002] The advantage of using an ultrasonic wind sensor to measure wind speed is that it does not contain moving parts, has good environmental adaptability, has a wide measurement range, and has no minimum measurement wind speed limit. Existing three-dimensional ultrasonic wind sensors with classic structures all use three pairs (six) of ultrasonic probes to construct a three-dimensional measurement wind field. The above-mentioned ultrasonic probe is the basic measurement unit, which contains a piezoelectric chip for transmitting and receiving fixed-frequency ultrasonic waves. When transmitting, the piezoelectric chip converts electrical energy into mechanical vibration to generate ultrasonic waves. When receiving, the piezoelectric chip converts the ultrasonic waves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/24
Inventor 刘世萱齐勇赵力付晓李民陈世哲裴亮
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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