CN117784279A - Transverse wave sensor polarization direction detection device, detection method and detection system - Google Patents
Transverse wave sensor polarization direction detection device, detection method and detection system Download PDFInfo
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Abstract
The invention provides a transverse wave sensor polarization direction detection device, a detection method and a detection system, wherein the detection device comprises the following components: the fixed table is used for installing a transverse wave sensor to be detected, and the transverse wave sensor can rotate around the propagation direction of transverse waves generated by the transverse wave sensor to adjust the installation angle; a vibration excitation unit for exciting vibration of the transverse wave sensor; and a vibration detection unit for transmitting a detection wave by the transverse wave sensor and receiving a reflected wave in a vibration state of the transverse wave sensor to determine a polarization direction of the transverse wave sensor according to frequencies of the reflected wave corresponding to different installation angles. Based on the technical scheme of the invention, the vibration of the transverse wave sensor is detected by utilizing the wave, and a non-contact detection scheme is designed, so that the polarization direction of the transverse wave sensor can be accurately determined, and further, the polarization direction of the acoustic probe applying the transverse wave sensor in the petrophysical acoustic test can be determined, thereby the test precision of the petrophysical acoustic test can be realized.
Description
Technical Field
The invention relates to the technical field of transverse wave polarization detection, in particular to a transverse wave sensor polarization direction detection device, a transverse wave sensor polarization direction detection method and a transverse wave sensor polarization direction detection system.
Background
The transverse wave sensor in the acoustic probe can be used for exciting and receiving transverse waves and is an important unit in the petrophysical acoustic testing device. The rock acoustic test system mainly comprises two acoustic probes which are arranged on two end faces of a rock sample, a transverse wave sensor in the probes performs sound-electricity conversion by means of a high-voltage electric signal generated by a pulse generator, a transient vibration is generated, the vibration propagates in the rock at a certain speed and is received by the acoustic probes at the other end, and the time and the signal amplitude of the vibration passing through the rock sample are recorded by means of preamplification, digitization and the like.
In the acoustic test process, the propagation direction of the transverse wave is perpendicular to the vibration direction of the particles, and the acoustic probes at the excitation end and the receiving end respectively have polarization directions, so that the consistency of the polarization directions of the transverse wave of the acoustic probes at the excitation end and the receiving end influences the signal quality; and the clamping angle between the direction of transverse wave polarization in the acoustic probe and the sample will also affect the time for the vibrations to pass through the rock sample. The accuracy of the acoustic test is affected by the problems, so that the quality of a transverse wave test signal in the acoustic test can be improved to a large extent by detecting and calibrating the transverse wave polarization direction of the corresponding acoustic probe, and meanwhile, data support can be provided for the anisotropic characteristic test of a sample with a specific angle with the polarization direction. For this purpose, the transverse wave polarization direction of the acoustic probe needs to be detected and calibrated.
In the research process, the technical scheme for detecting the polarization direction of the transverse wave sensor in the prior art has a plurality of defects, wherein the technical scheme at least comprises the following problems: in the current vibration measurement method, a vibration sensor is attached to the surface of an object to be measured, and the output signal of the vibration sensor is used for realizing the related measurement of acceleration, speed and displacement. However, the mass of the acceleration sensor can influence the vibration of the object, so that the original vibration state is destroyed, and the measurement accuracy is influenced.
Therefore, how to improve the vibration measurement accuracy to accurately measure the polarization direction of the transverse wave sensor is a problem to be solved.
Disclosure of Invention
In order to solve the problem of low measurement accuracy in the technical means for detecting the polarization direction of the transverse wave sensor in the prior art, the invention provides a device, a method and a system for detecting the polarization direction of the transverse wave sensor.
In a first aspect, the present invention provides a polarization direction detection device for a transverse wave sensor, including:
the fixed table is used for installing the transverse wave sensor to be detected, and the transverse wave sensor installed on the fixed table can rotate around the propagation direction of transverse waves generated by the transverse wave sensor to adjust the installation angle;
a vibration excitation unit for exciting vibration of the transversal wave sensor mounted to the stationary stage;
and the vibration detection unit is used for transmitting detection waves to the transverse wave sensor arranged on the fixed table and receiving reflected waves in the vibration state of the transverse wave sensor so as to determine the polarization direction of the transverse wave sensor according to the frequencies of the reflected waves corresponding to the transverse wave sensor under different installation angles.
In one embodiment, the method further comprises:
the angle calibration unit can be sleeved on the transverse wave sensor, scales distributed along the rotation direction of the transverse wave sensor are arranged on the angle calibration unit, and the scales are used for calibrating the installation angle.
In one embodiment, the accuracy of the scale of the angle calibration unit is no greater than 10 °.
In one embodiment, the method further comprises:
and the reflection reinforcing film can be sleeved on the transverse wave sensor at a position corresponding to the detection wave of the vibration excitation unit and is used for reinforcing the reflection intensity of the reflection wave.
In one embodiment, the propagation direction of the detection wave emitted by the vibration detection unit is perpendicular to the propagation direction of the transverse wave.
In one embodiment, the detection wave emitted by the vibration detection unit is an acoustic wave or an electromagnetic wave.
In a second aspect, the present invention provides a polarization direction detection system of a transverse wave sensor, which includes the polarization direction detection device of a transverse wave sensor; and
the main control device is electrically connected with the vibration excitation unit and the vibration detection unit in the detection device respectively.
In a third aspect, the present invention provides a method for detecting a polarization direction of a transverse wave sensor, including:
transmitting detection waves to the transverse wave sensor in a vibration state, receiving reflected waves, and recording frequency data of the reflected waves and the current installation angle of the transverse wave sensor;
sequentially acquiring frequency data of the reflected wave corresponding to each installation angle in an angle range of a complete peripheral angle;
and determining a target reflected wave with the largest frequency variation amplitude according to the frequency data and the frequency of the detection wave, and taking the direction corresponding to the installation angle corresponding to the target reflected wave as the polarization direction of the transverse wave sensor.
In one embodiment, sequentially obtaining frequency data of the reflected wave corresponding to each installation angle in an angle range of a complete circumferential angle includes:
according to the preset adjustment precision, the transverse wave sensor is rotated by a corresponding angle to adjust the installation angle;
and transmitting detection waves to the transverse wave sensor again, receiving reflected waves, and recording frequency data of the reflected waves and the current installation angle.
In one embodiment, the method further comprises:
transmitting a vibration excitation signal to the transverse wave sensor so that the transverse wave sensor enters a vibration state, and synchronously recording the excitation time of the current vibration excitation signal;
and after the preset time length, transmitting vibration excitation signals to the transverse wave sensor again, and synchronously recording the current excitation time of the vibration excitation signals.
The above-described features may be combined in various suitable ways or replaced by equivalent features as long as the object of the present invention can be achieved.
Compared with the prior art, the transverse wave sensor polarization direction detection device, the transverse wave sensor polarization direction detection method and the transverse wave sensor polarization direction detection system have the following beneficial effects:
according to the device, the method and the system for detecting the polarization direction of the transverse wave sensor, the vibration of the transverse wave sensor is detected by utilizing the waves, a non-contact detection scheme is designed, the polarization direction of the transverse wave sensor can be accurately determined, and then the polarization direction of an acoustic probe applying the transverse wave sensor in the petrophysical acoustic test can be determined, so that the test precision of the petrophysical acoustic test can be achieved.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a schematic diagram showing the principle of Doppler effect on which the detection device of the present invention is based;
FIG. 2 shows a schematic structural diagram of the detection device of the present invention;
FIG. 3 shows a schematic view of polarization of a shear wave sensor of the present invention over a range of circumferential angles;
fig. 4 shows a schematic diagram of the vibration signal energy intensity of the transverse wave sensor of the present invention over a range of circumferential angles.
In the drawings, like parts are designated with like reference numerals. The figures are not to scale.
Reference numerals:
1. a fixed table; 2. a vibration excitation unit; 3. a vibration detecting unit; 4. a transverse wave sensor; 5. a reflection enhancing film; 6. and a master control device.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Example 1
The embodiment of the invention provides a transverse wave sensor polarization direction detection device, which comprises:
the transverse wave sensor comprises a fixed table 1, a transverse wave sensor 4 and a transverse wave sensor, wherein the fixed table 1 is used for installing the transverse wave sensor 4 to be detected, and the transverse wave sensor 4 installed on the fixed table 1 can rotate around the propagation direction of transverse waves generated by the transverse wave sensor to adjust the installation angle;
a vibration excitation unit 2, the vibration excitation unit 2 being for exciting vibration of the transverse wave sensor 4 mounted on the stationary table 1;
and a vibration detecting unit 3, wherein the vibration detecting unit 3 is used for transmitting detection waves to the transverse wave sensor 4 mounted on the fixed table 1 and receiving reflected waves in the vibration state of the transverse wave sensor 4 so as to determine the polarization direction of the transverse wave sensor 4 according to the frequencies of the reflected waves corresponding to the transverse wave sensor 4 under different mounting angles.
In particular, referring to fig. 1 of the drawings, the detection device of the present invention is based on the doppler effect. When a wave (acoustic wave, electromagnetic wave, etc.) having a certain frequency component is directed to a moving object, the frequency of the wave reflected from the object changes in proportion to the velocity (including the velocity direction) of the object, which is a doppler phenomenon or a doppler effect.
Referring to FIG. 1 of the drawings, the frequency is f 0 Is irradiated onto the moving object to be measured, and the Doppler effect is generated by the light reflected or scattered from the surface of the moving object, i.e. the Doppler effect is removedLaser frequency f of itself 0 In addition to a frequency f D (equal in value to the difference between the frequency of the transmitted wave and the frequency of the reflected wave), called doppler frequency, which satisfies:
wherein:
lambda is the wavelength of the laser;
v is the motion speed (vector) of the measured object;
θ is the angle between the incident light and the moving direction of the measured object;
vcos θ is the component of the measured object velocity in the direction of laser incidence.
Because the wavelength lambda of the general laser is very stable, and the included angle between the incident light of the laser and the moving direction of the measured object is 0 DEG, the Doppler frequency f D The relationship with v can be reduced to:
according to the principle, the detection of the vibration direction based on the Doppler principle is adopted to determine the polarization direction of the transverse wave.
Referring to fig. 2 of the drawings, in the present embodiment, the transversal wave sensor 4 is disposed in the acoustic probe, so in this embodiment, the detection of the transversal wave sensor 4 is based on the acoustic probe, the acoustic probe has a columnar probe end extending outwards, and the vibration generated by the transversal wave sensor 4 drives the probe end to vibrate and then generates a transversal wave propagating along the axial direction of the probe.
In this embodiment, first, an acoustic probe (i.e., a transverse wave sensor 4) is movably mounted on a fixed table 1, and the acoustic probe can be rotated about the propagation direction of the transverse wave (i.e., the axial direction of a columnar probe end) generated by the acoustic probe, referring to fig. 2 of the drawings. An initial installation angle is determined and then the vibration excitation unit 2 (in this embodiment a pulse generator) sends a vibration excitation signal to the acoustic probe to excite the vibration of the acoustic probe, which, due to the structural design of the acoustic probe itself, occurs in a plane perpendicular to the axis of the probe end, but it is unclear which direction is in this plane, which is also the polarization direction that is ultimately desired to be measured.
Then, the detection wave is emitted to the probe end of the acoustic probe by the vibration detection unit 3, and the vibration detection unit 3 employs a laser generator in this embodiment, that is, the detection wave employs an optical wave (one of electromagnetic waves), or may employ a mechanical wave such as an acoustic wave, or other electromagnetic waves, as the case may be. The detection wave reaches the probe end, then generates a transmission wave and is received by the vibration detection unit 3, and based on the doppler effect, the frequency of the reflection wave changes on the original frequency of the detection wave, and the change value of the frequency is related to the vibration speed (the value and the direction) of the probe end, so that the vibration condition of the probe end in the corresponding direction can be determined according to the frequency of the reflection wave.
Then, based on the initial installation angle, the acoustic probe is rotated by a preset angle, the installation angle is adjusted, and the detection direction is also adjusted. And transmitting the detection wave to the probe end of the acoustic probe again, and acquiring the reflected wave and the frequency data of the reflected wave again.
Finally, based on the initial installation angle, n preset angles of the acoustic probe are sequentially made, and the angles of each rotation are preferably the same until the acoustic probe rotates by an angle of a complete circumferential angle. N reflected waves and their frequency data are acquired sequentially.
According to the principle of polarization, the polarization direction of one transverse wave is unique, but the vibration direction of a macroscopic object in a three-dimensional space is compounded by a plurality of directions, so that the polarization of the transverse wave generates components in other directions, and the magnitude of the components is expressed as the variation amplitude of the vibration frequency in the corresponding direction. Referring to fig. 3 of the drawings, the amplitude of the variation of the vibration frequency in the vibration direction closer to the polarization direction (the direction of the connecting straight line between 20 ° and 200 ° in fig. 3) is larger, and thus the polarization direction can be determined from the frequency of the reflected wave. Referring to fig. 4 of the drawings, it can be seen that the vibration signal energy is more concentrated in the 20 ° and 200 ° directions, and the corresponding phase situation also exactly accords with the rule of opposite directions (the opposite back and forth movement of the particles corresponding to the back and forth vibration), so that the direction is determined as the transverse wave polarization direction of the acoustic probe.
In the present embodiment, referring to fig. 2 of the drawings, the propagation direction of the detection wave emitted from the vibration detection unit 33 is perpendicular to the propagation direction of the transverse wave (perpendicular to the vibration surface of the transverse wave sensor 4). The detection wave and the propagation direction of the reflected wave are collinear and reverse, so that the structure of the detection device can be simplified, the transmitting end and the receiving end can be arranged at one position, and the data processing can be simplified.
Further, the detection device further includes:
the angle calibration unit can be sleeved on the transverse wave sensor 44, and scales distributed along the rotation direction of the transverse wave sensor 44 are arranged on the angle calibration unit and used for calibrating the installation angle.
Specifically, the angle calibration unit is not shown in the drawings, and the main structure of the angle calibration unit can be an annular structure which can be sleeved on the transverse wave sensor 4 (the acoustic probe in the embodiment), and the angle calibration unit can be a collar of a fixed structure or an annular structure formed by winding a belt-shaped structure on the transverse wave sensor 4. In this embodiment, an adhesive tape to be calibrated may be used, where the calibration divides a complete circumferential angle of the transverse wave sensor 4 into n equal parts, and an angle corresponding to each equal part is a preset angle for rotating the acoustic probe once.
In this embodiment, an angle starting point may be selected on the acoustic probe where the transverse wave sensor 4 is located, and may be used as a 0 ° scale line, and a line on the acoustic probe for installing a cable may be used as a 0 ° scale line.
Preferably, the accuracy of the calibration of the angle calibration unit is not more than 10 °, i.e. the angle of one rotation of the acoustic probe is not more than 10 °, such that 36 rotations, or 36 reflections and corresponding frequency data, are possible over a complete circumference. The smaller the accuracy of the scale of the angle calibration unit is, the more the number of reflected waves is, the more accurate the detection result is, and the detection result can be adjusted according to specific conditions.
It should be noted that, referring to fig. 3 of the drawings, for convenience of comparison, it is preferable that the straight line corresponding to the polarization direction corresponds to two detection angles, that is, corresponds to the data of two reflected waves. The number of tests within a complete circumference is therefore preferably an even number, and the quotient of a complete circumference and the predetermined angle of one revolution of the acoustic probe is therefore preferably an even number.
Further, the detection device further includes:
the reflection enhancing film 55 is provided so that the reflection enhancing film 55 can be fitted over the transverse wave sensor 44 at a position corresponding to the detection wave of the vibration excitation unit 22, and serves to enhance the reflection intensity of the reflected wave.
Specifically, referring to fig. 2 of the drawings, the reflection enhancing film 55 can enhance the energy of the signal during the reflected wave reception process and improve the signal-to-noise ratio.
Example 2
The embodiment is an improvement on the basis of embodiment 1, and the same contents are partially referred to embodiment 1, and the description is omitted.
The embodiment of the invention provides a transverse wave sensor polarization direction detection device, which further comprises:
the angle adjusting unit comprises a rotating seat arranged on the fixed table and a driving unit connected with the rotating seat, and the rotating seat is used for installing the transverse wave sensor.
Specifically, in this embodiment, an angle adjustment unit (not shown in the drawings) may be used to automatically control the installation angle, and specifically, a setting may be performed for the driving unit, for example, a servo motor is used to perform angular rotation by a fixed amount at fixed time, and each rotation is performed by a corresponding preset angle. Therefore, the degree of automation of the detection device can be improved, and errors existing in manual rotation can be avoided.
Example 3
The embodiment of the invention provides a method for detecting the polarization direction of a transverse wave sensor, which comprises the following steps:
step S100: transmitting a vibration excitation signal to the transverse wave sensor so that the transverse wave sensor enters a vibration state, and synchronously recording the excitation time of the current vibration excitation signal;
step S200: transmitting detection waves to the transverse wave sensor in a vibration state, receiving reflected waves, and recording frequency data of the reflected waves and the current installation angle of the transverse wave sensor;
step S300: sequentially acquiring frequency data of reflected waves corresponding to all installation angles in an angle range of a complete peripheral angle;
step S310: according to the preset adjustment precision, the transverse wave sensor rotates by a corresponding angle to adjust the installation angle;
step S320: after a preset time length, transmitting vibration excitation signals to the transverse wave sensor again, and synchronously recording the excitation time of the current vibration excitation signals;
step S330: transmitting detection waves to the transverse wave sensor again, receiving reflected waves, and recording frequency data of the reflected waves and the current installation angle;
specifically, steps S100 to 300 are detection steps, in this embodiment, an acoustic probe (i.e. a transverse wave sensor) is movably mounted on a fixed table, and the acoustic probe can rotate around the propagation direction of the transverse wave (i.e. the axial direction of the columnar probe end) generated by the acoustic probe, referring to fig. 2 of the drawings. Taking a wire slot on the acoustic probe for installing a cable as a starting position of zero degree, measuring the perimeter of the acoustic probe by using an adhesive tape, intercepting the adhesive tape with the corresponding perimeter, calibrating the acoustic probe with 36 equal division scales according to the length of the intercepted adhesive tape, wherein each scale (10 degrees) represents each angle of probe rotation, and finally fixing the adhesive tape on the acoustic probe.
After the acoustic probe is fixed, a vibration excitation signal and a synchronous record signal are emitted, and the synchronous record signal is used for determining the excitation time of the signal. The frequency change of the laser beam generated by the laser Doppler device before and after being emitted to the acoustic probe is recorded, a series of signal amplification and digitization means are adopted, signals are output to a computer, and the whole transverse wave vibration signal acquisition is completed.
In order to detect the transverse wave polarization direction of the acoustic probe, the transverse placing angle of the probe is sequentially rotated by using the adhesive tape arranged on the acoustic probe and scales on the adhesive tape, and vibration signal acquisition is carried out every 10 degrees, so that a plurality of vibration frequency data are obtained.
Step S400: and determining a target reflected wave with the largest frequency variation amplitude according to the frequency data of the reflected wave and the frequency of the detected wave, and taking the direction corresponding to the installation angle corresponding to the target reflected wave as the polarization direction of the transverse wave sensor.
Specifically, referring to fig. 4 of the drawings, in order to vividly show the vibration condition of the acoustic probe, corresponding angle coordinates are specially drawn on the data collected each time, so as to form a vibration condition distribution diagram within a complete circumferential angle range, and the polarization condition of the transverse wave of the acoustic probe can be clearly seen through dense image display on the drawings. In this linear azimuth between 110 DEG and 290 DEG, the vibration is weak, the amplitude of the change of the vibration frequency is small, and the component of the polarization of the transverse wave above this azimuth is small, so that it can be judged that the polarization direction of the transverse wave is not in this direction.
Also, since the amplitude of the change in the vibration frequency is minimized in this linear direction between 110 ° and 290 °, it is possible to directly determine that the polarization direction of the transverse wave is in the linear direction between 20 ° and 200 °. Of course, the vibration condition in the straight line direction between 20 degrees and 200 degrees can be directly seen on the figure, the variation amplitude of the vibration frequency is also the largest, and the vibration frequency can be directly determined as the polarization direction of the transverse wave.
Further, in order to more clearly compare and analyze the energy and phase diagram of the probe test, a signal intensity diagram is drawn for the original test data according to the angle distribution, and refer to fig. 4 of the accompanying drawings. Where a color depth value represents the magnitude of the vibration amplitude and a negative value represents the opposite vibration phase. It can be seen that the vibration signal energy is more concentrated (darker) in the straight line orientation between 20 ° and 200 °, and the corresponding phase situation also exactly conforms to the rule of opposite phases, for which the orientation is determined to be the transverse wave polarization direction of the acoustic probe.
Example 4
The embodiment of the invention provides a transverse wave sensor 4 polarization direction detection system, which comprises the transverse wave sensor 4 polarization direction detection device; and
the main control device 6, the main control device 6 is respectively and electrically connected with the vibration excitation unit 2 and the vibration detection unit 3 in the detection device.
Specifically, the main control device 6 is used for controlling the operation of the detecting device, and is also used for receiving the data measured by the detecting device and performing subsequent data processing.
In the description of the present invention, it should be understood that the terms "upper," "lower," "bottom," "top," "front," "rear," "inner," "outer," "left," "right," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (10)
1. A transverse wave sensor polarization direction detection device, comprising:
the fixed table is used for installing the transverse wave sensor to be detected, and the transverse wave sensor installed on the fixed table can rotate around the propagation direction of transverse waves generated by the transverse wave sensor to adjust the installation angle;
a vibration excitation unit for exciting vibration of the transversal wave sensor mounted to the stationary stage;
and the vibration detection unit is used for transmitting detection waves to the transverse wave sensor arranged on the fixed table and receiving reflected waves in the vibration state of the transverse wave sensor so as to determine the polarization direction of the transverse wave sensor according to the frequencies of the reflected waves corresponding to the transverse wave sensor under different installation angles.
2. The shear wave sensor polarization direction detection device of claim 1, further comprising:
the angle calibration unit can be sleeved on the transverse wave sensor, scales distributed along the rotation direction of the transverse wave sensor are arranged on the angle calibration unit, and the scales are used for calibrating the installation angle.
3. The shear wave sensor polarization direction detection device of claim 2, wherein the accuracy of the scale of the angle calibration unit is no more than 10 °.
4. The shear wave sensor polarization direction detection device of claim 1, further comprising:
and the reflection reinforcing film can be sleeved on the transverse wave sensor at a position corresponding to the detection wave of the vibration excitation unit and is used for reinforcing the reflection intensity of the reflection wave.
5. The transverse wave sensor polarization direction detection device according to any one of claims 1 to 4, wherein a propagation direction of the detection wave emitted by the vibration detection unit is perpendicular to a propagation direction of the transverse wave.
6. The transverse wave sensor polarization direction detection device according to any one of claims 1 to 4, wherein the detection wave emitted by the vibration detection unit is an acoustic wave or an electromagnetic wave.
7. A transverse wave sensor polarization direction detection system, characterized in that it comprises a transverse wave sensor polarization direction detection device according to any one of claims 1 to 6; and
the main control device is electrically connected with the vibration excitation unit and the vibration detection unit in the detection device respectively.
8. A method for detecting the polarization direction of a transverse wave sensor, comprising:
transmitting detection waves to the transverse wave sensor in a vibration state, receiving reflected waves, and recording frequency data of the reflected waves and the current installation angle of the transverse wave sensor;
sequentially acquiring frequency data of the reflected wave corresponding to each installation angle in an angle range of a complete peripheral angle;
and determining a target reflected wave with the largest frequency variation amplitude according to the frequency data and the frequency of the detection wave, and taking the direction corresponding to the installation angle corresponding to the target reflected wave as the polarization direction of the transverse wave sensor.
9. The method for detecting a polarization direction of a shear wave sensor according to claim 8, wherein sequentially acquiring frequency data of the reflected wave corresponding to each of the installation angles within an angle range of one complete circumferential angle comprises:
according to the preset adjustment precision, the transverse wave sensor is rotated by a corresponding angle to adjust the installation angle;
and transmitting detection waves to the transverse wave sensor again, receiving reflected waves, and recording frequency data of the reflected waves and the current installation angle.
10. The shear wave sensor polarization direction detection method according to claim 8 or 9, further comprising:
transmitting a vibration excitation signal to the transverse wave sensor so that the transverse wave sensor enters a vibration state, and synchronously recording the excitation time of the current vibration excitation signal;
and after the preset time length, transmitting vibration excitation signals to the transverse wave sensor again, and synchronously recording the current excitation time of the vibration excitation signals.
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| CN202211185181.0A CN117784279A (en) | 2022-09-27 | 2022-09-27 | Transverse wave sensor polarization direction detection device, detection method and detection system |
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