CN115950519B - Sound velocity accurate measurement device, detection method and storage medium - Google Patents
Sound velocity accurate measurement device, detection method and storage medium Download PDFInfo
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- CN115950519B CN115950519B CN202310245005.XA CN202310245005A CN115950519B CN 115950519 B CN115950519 B CN 115950519B CN 202310245005 A CN202310245005 A CN 202310245005A CN 115950519 B CN115950519 B CN 115950519B
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Abstract
The invention is applicable to the field of sound velocity measurement, and provides a sound velocity accurate measurement device, a detection method and a storage medium, wherein the sound velocity accurate measurement device comprises: a laser measuring device, a sound field generating device and a detecting device; the laser measuring device comprises a pulse laser, a plurality of spectroscopes, a plurality of reflecting mirrors and a photoelectric detector; the sound field generating device comprises a sound source and a medium container; the detection device comprises two position sensors, the position sensors are used for respectively receiving a first detection light beam and a second detection light beam, and whether the sound field generating device deviates from a set position is determined by determining deflection conditions of the first detection light beam and the second detection light beam on the position sensors. By introducing the detection device, whether the relative position between the laser measuring device and the sound field generating device is accurate or not is confirmed by utilizing the detection device, so that the relative position is adjusted, and the accuracy of sound velocity measurement is improved.
Description
Technical Field
The invention belongs to the field of sound velocity measurement, and particularly relates to a sound velocity accurate measurement device, a detection method and a storage medium.
Background
The ocean sound velocity is in the key position of ocean metering, which not only directly determines the positioning accuracy, but also influences the efficiency of the work of radar, sonar and the like. Thus, achieving high-accuracy, rapid measurements of ocean sound velocity is critical to the exploration of the propulsion ocean. At present, sea water sound velocity measurement is mainly applied to sonar, and underwater sound waves are utilized by the sonar to detect underwater targets, so that the sea water sound velocity measurement is widely applied to important ocean engineering applications such as torpedo guidance, ship navigation, hydrologic measurement, submarine imaging and the like.
Currently, conventional sonic meters fall into two categories: a thermal salt depth detector (CTD) and a Sound Velocity Profiler (SVP). A thermal salt depth detector (CTD) calculates the sound velocity value of the sea water by using the empirical formula of the sea water through measuring the values of temperature, salinity and depth. The Sound Velocity Profiler (SVP) utilizes a pulse ringing method to measure the flight time of sound waves through the combination of pulse sound waves and piezoelectric effects, so that the sound velocity calculation is completed. The two traditional sound velocity meters, the temperature and salt depth detector is based on an empirical formula method, are limited by application scenes and application areas, have large precision floating, and are difficult to guarantee traceability. The piezoelectric effect utilized by the ringing method employed by the acoustic velocity profiler introduces errors that are difficult to eliminate, while there are stringent requirements on the transducer, and in order to obtain an accurate acoustic velocity value, it is generally necessary that the acoustic wave makes a round trip a plurality of times within a fixed distance, so that time errors are accumulated over a plurality of round trips, and echoes may interfere with the transmitted signal, thereby affecting the accuracy of the acoustic velocity measurement. In marine metering, the accuracy of a traceable direct method often needs to be calibrated by an indirect method without traceability. Therefore, the traditional sound velocity measurement method cannot ensure traceability and precision at the same time, and the establishment of the reference is not completed in the field of sea water metering. In the prior art, a Mach-Zehnder interferometer is utilized to measure the sound velocity of a water body, one laser source emits laser and is divided into two beams through a spectroscope, one beam is a measuring beam, the other beam is a reference beam, the measuring beam is parallel to the reference beam and passes through a sound field and generates an acousto-optic effect with sound waves, the two beams of laser are recombined, and the sound velocity is measured according to the optical path difference and the time difference of a measuring optical path and the reference optical path.
In the prior art, when measuring the sound velocity, the requirement on the relative position between the components is high, and the measurement of the sound velocity may be deviated.
Disclosure of Invention
The embodiment of the invention aims to provide an accurate sound velocity measuring device, which aims to solve the problem of reducing deviation generated in the prior art when measuring sound velocity.
The embodiment of the invention is realized in such a way that the sound velocity accurate measurement device comprises: a laser measuring device, a sound field generating device and a detecting device;
the laser measuring device comprises a pulse laser, a plurality of spectroscopes, a plurality of reflecting mirrors and a photoelectric detector, wherein laser emitted by the pulse laser is split into a measuring beam and a reference beam through the spectroscopes, passes through a sound field generated by the sound field generating device, is combined through the spectroscopes and is received by the photoelectric detector, and the reflecting mirrors are used for changing the path of the reference beam;
the sound field generating device comprises a sound source and a medium container, wherein the sound source is arranged in the medium container and is used for generating sound waves, and the sound waves form a sound field in the medium container;
the detection device is used for emitting laser, receiving at least two laser beams after the laser beams pass through the sound field in parallel, determining deflection conditions of the two laser beams after the two laser beams are acted by sound waves, and setting the detection device to be equal in optical path length from the two laser beams passing through the sound field to the received laser beams.
Another object of the embodiment of the present invention is a detection method of an accurate sound velocity measurement device, including:
acquiring offset data of formed light spots of two laser beams on a position sensor in the laser measuring device provided by the invention;
confirming whether the offset distance and the offset angle of the two laser beams are the same according to the offset data;
judging whether the relative position relation between the measuring beam and the sound field generating device in the laser measuring device is accurate or not;
and if the sound field generation device is inaccurate, controlling the adjusting device to adjust the position of the sound field generation device.
Another object of an embodiment of the present invention is a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, causes the processor to execute the steps of a sound speed accurate measurement device detection method described above.
According to the sound velocity accurate measurement device provided by the embodiment of the invention, the detection device is introduced, so that whether the relative position between the laser measurement device and the sound field generation device is accurate or not is confirmed by utilizing the detection device, the relative position is adjusted, and the accuracy of sound velocity measurement is improved.
Drawings
Fig. 1 is a schematic diagram of an accurate sound velocity measurement device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of sound velocity measurement of a sound velocity accurate measurement device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another device for precisely measuring the speed of sound according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another sound velocity accurate measurement device according to an embodiment of the present invention.
In the accompanying drawings: 10. a pulsed laser; 11. a first spectroscope; 12. a second beam splitter; 13. a third spectroscope; 14. a first mirror; 15. a second mirror; 16. a fourth spectroscope; 17. a fifth spectroscope; 18. a photodetector; 19. an oscilloscope; 21. a media container; 22. a sound source; 31. a first position sensor; 32. a second position sensor; 33. a position determining device; 41. a displacement table; 42. a third mirror; 43. a fourth mirror; 44. a sixth spectroscope; 45. a seventh spectroscope; 46. an eighth spectroscope; 47. a fifth reflecting mirror; 48. a sixth mirror; 49. a continuous interference device.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
Referring to fig. 1, a schematic diagram of an accurate sound velocity measurement device according to an embodiment of the present invention includes:
a laser measuring device, a sound field generating device and a detecting device;
the laser measuring device comprises a pulse laser 10, a plurality of spectroscopes, a plurality of reflecting mirrors and a photoelectric detector 18, wherein laser emitted by the pulse laser 10 is split into a measuring beam and a reference beam through the spectroscopes, passes through a sound field generated by the sound field generating device, is combined through the spectroscopes and is received by the photoelectric detector 18, and the reflecting mirrors are used for changing the path of the reference beam;
the sound field generating device comprises a sound source 22 and a medium container 21, wherein the sound source 22 is arranged in the medium container 21 and is used for generating sound waves, and the sound waves form a sound field in the medium container 21;
the detection device comprises two position sensors, the position sensors are used for respectively receiving a first detection light beam and a second detection light beam, the first detection light beam is led out by one spectroscope after passing through the sound field by a measurement light beam, the second detection light beam is led out by the other spectroscope after passing through the sound field by a reference light beam, and whether the sound field generating device deviates from a set position is determined by determining deflection conditions of the first detection light beam and the second detection light beam on the position sensors.
In this embodiment, in the present embodiment, the laser measuring device and the acoustic field generating device are matched, the measuring beam and the reference beam of the laser measuring device pass through the acoustic field generated by the acoustic field generating device, the acoustic wave in the acoustic field acts on the measuring beam and the reference beam respectively, the disturbance of the acoustic wave on the measuring beam and the reference beam is detected by the photodetector 18, so that the propagation time of the acoustic wave between the measuring beam and the reference beam can be accurately measured, and then the distance between the reference beam and the measuring beam passing through the acoustic field is measured, so that the propagation speed of the acoustic wave in the medium can be calculated. The positional relationship between the laser measuring device and the sound field generating device cannot deviate from the set position during measurement, namely, the measuring beam, the reference beam and the sound wave propagation direction are perpendicular, otherwise, errors are generated in the measuring result. The detection device is used for detecting deflection conditions of the measuring beam and the reference beam on the position sensor after the measuring beam and the reference beam are subjected to sound field effect; when the relative position of the sound field generating device and the laser measuring device is changed, and the sound wave transmission direction is not perpendicular to the measuring beam, for example, the sound field generating device is inclined, and at this time, the optical path from the measuring beam to the received reference beam from the medium container 21 is changed compared with the optical path at the initial setting, so that the deflection condition of the light spot after the two laser beams are received is changed. Therefore, whether the relative position between the laser measuring device and the sound field generating device is accurate or not is confirmed through the detecting device, so that the set position is adjusted, and the accuracy of sound velocity measurement is improved.
In this embodiment, the laser measuring device is used to cooperate with the sound field generating device to measure the sound velocity, mainly the sound velocity of sound in different media, and the sound velocity measurement principle is based on a mach-zehnder interferometer and implemented by the pulse laser 10. The pulse laser 10 may be a femtosecond laser, the frequency of which emits pulse laser light is constant; the measuring beam and the reference beam pass through the beam part of the sound field generating device and are two parallel beams, and the distance between the two parallel beams can be preset or manually measured, and the specific limitation is not provided herein. The measuring beam and the reference beam can react with sound waves in the sound field to generate acousto-optic diffraction effect. The beam portions of the measuring beam and the reference beam passing through the sound field generating device are perpendicular to the transmission direction of the acoustic wave, and the positional relationship of the laser measuring device and the sound field generating device may be set according to the relationship. The measuring beam and the reference beam are split by a beam splitter after being sent out by a pulse laser generator, the measuring beam and the reference beam are combined by another beam splitter after passing through the sound field, and then are received by a photoelectric detector 18, and the measuring beam and the reference beam come from the same laser and are parallel in the sound field, so that the reference beam can realize the change of the path through the cooperation of the reflecting mirrors.
In this embodiment, the medium container 21 in the sound field generating device is used for holding a medium to be measured, and the medium to be measured may be liquid or gas, for example, may be a water body; the sound source 22 can emit plane waves, so that the effect of the plane waves on the medium to be measured is better, the effect of the plane waves on the measuring beam and the reference beam is better, and errors can be reduced; the sound source 22 may be disposed at a side wall at one end inside the medium container 21, and sound waves emitted from the sound source 22 may be propagated from one end to the other end of the medium container 21, and the medium container 21 may be rectangular parallelepiped-shaped, which is not particularly limited herein. In this embodiment, the frequency of the acoustic wave having the acousto-optic diffraction effect may be a chirp signal of 1MHz, which is not particularly limited herein. When the acoustic wave passes through the reference beam and the measuring beam, diffraction occurs, the photodetector 18 receives the laser light and generates a corresponding signal, and the signal can be subjected to denoising, autocorrelation and cubic spline interpolation, so that the flight time of the acoustic wave can be obtained.
In this embodiment, when the detection device is required to detect whether the sound field generating device deviates from the preset position, the sound field generating device may emit a low-frequency sound wave, where the low-frequency sound wave acts on the measuring beam and the reference beam, and at this time, the laser is mainly caused to generate a refraction phenomenon, and the detection device detects the deflection conditions of the measuring beam and the reference beam caused by refraction. The detection means may comprise two position sensors for detecting the measuring beam, the reference beam. Specifically, the measuring beam and the reference beam can be led out through the spectroscope, and the led out measuring beam and the reference beam are used as a first detecting beam and a second detecting beam which are used for reflecting refraction conditions of the sound field on the measuring beam and the reference beam. Preferably, the measuring beam and the reference beam can be led out from the same position after being emitted out of the sound field generating device, and the two position sensors can also receive the measuring beam and the reference beam from the same position; when the positions of the laser measuring device, the detecting device and the sound field generating device are in accordance with the set positions, whether the sound source 22 is started or not, the deflection angles and the deflection distances of the light spots formed by the first detecting light beam and the second detecting light beam on the position sensor should be the same, and as long as the positions of the sound field generating device deviate from the set positions, the deflection positions and the deflection distances of the light spots formed by the first detecting light beam and the second detecting light beam on the position sensor are different according to the geometric principle. It will be understood that the distances between the two position sensors and the sound field generating device may not be equal, for example, the distances between the two position sensors and the sound field generating device are in a multiple relationship, so that the deflection conditions of the first detection beam and the second detection beam forming the light spot on the position sensor also change correspondingly according to the multiple relationship, and when the position of the sound field generating device deviates from the set position, the deflection positions and the deflection distances of the first detection beam and the second detection beam forming the light spot on the position sensor will not conform to the deflection conditions under normal conditions.
It will be appreciated that the positions of the components cannot be corrected in general when measuring the speed of sound, and that the correction can be performed by emitting laser light without opening the sound source 22 when setting the positions of the elements in the laser measuring device and the detecting device.
For the detection device principle, by way of example, when the sound wave propagates, if the propagation direction of the sound wave is perpendicular to the laser beam, due to the acousto-optic refraction effect, the light only moves on the X axis of the received plane, and no reading exists in the Y axis direction; if the Y direction has a reading at this time, the propagation direction of the sound wave is not perpendicular to the light beam, which indicates that the sound field generating device deflects in a certain direction; however, since the laser beam is deflected on the X-axis after being insonated, if the laser beam is deflected further on the X-axis due to the deflection of the sound field generating device in other directions, the laser beam cannot be detected by one laser beam, and at this time, by detecting the two laser beams of the measuring beam and the reference beam, if the laser beam is deflected further on the X-axis due to the deflection of the sound field generating device in other directions, the distances of the two laser beams reaching the received plane after being insonated due to the deflection of the sound field generating device in other directions are no longer equal, so that the deflection distances of the two laser beams on the received plane are no longer equal, and the deflection of the sound source 22 generating device in the other direction can be detected. So that the position of the sound field generating means is subsequently corrected based on the detection result of the detecting means.
For the laser measuring device, as shown in fig. 2, in an exemplary embodiment, the laser light emitted by the pulse laser 10 in the laser measuring device is split into a measuring beam and a reference beam by the first beam splitter 11, after the measuring beam passes through a sound field and the reference beam is reflected by the first reflecting mirror 14 and the second reflecting mirror 15 in sequence, the measuring beam and the reference beam are combined into a first combined laser light by the second beam splitter 12, that is, a measuring beam is formed between the first beam splitter 11 and the second beam splitter 12, and a reference beam is formed between the first beam splitter 11 and the first reflecting mirror 14 and between the second reflecting mirror 15 and the second beam splitter 12; at this time, half of the optical path difference between the measuring beam and the reference beam is the flight distance of the acoustic wave propagation. In this embodiment, the combined laser light may be received directly by a photodetector 18, and the photodetector 18 may be filtered by a filter and then displayed by an oscilloscope 19. The pulse laser 10 emits pulse laser light at a fixed frequency, so that the emission period of the pulse laser light is determined, and when an acoustic wave acts on the measuring beam and the reference beam, respectively, the oscilloscope 19 displays two different waveforms, and the time difference between the two waveforms is the propagation time of the acoustic wave between the measuring beam and the reference beam, and the time difference between the two waveforms can be determined by the pulse number.
As shown in fig. 1, as a preferred embodiment of the present invention, the laser light emitted by the pulse laser 10 is split into a measuring beam and a reference beam by the first beam splitter 11, and after the measuring beam passes through the sound field and the reference beam is reflected by the first reflecting mirror 14 and the third beam splitter 13 in sequence, the measuring beam and the reference beam are combined into a first combined laser light by the second beam splitter 12; the first detection beam is transmitted by the measuring beam through the second beam splitter 12 and received by the first position sensor 31, the second detection beam is transmitted by the reference beam through the third beam splitter 13 and received by the second position sensor 32, the first beam splitter 11, the second beam splitter 12 and the first position sensor 31 are positioned on the same straight line, and the first reflecting mirror 14, the third beam splitter 13 and the second position sensor 32 are positioned on the same straight line.
In the present embodiment, the second beam splitter 12 is configured to transmit the measuring beam as the first detecting beam in addition to combining the measuring beam with the reference beam; the third beam splitter 13 refracts the reference beam by 90 ° for subsequent beam combination with the measuring beam, and also transmits the reference beam to be a second detecting beam; the transmitted first detection beam and second detection beam are naturally parallel to each other, and at this time, the first position sensor 31 and the second position sensor 32 respectively receive the first detection beam and the second detection beam, which is equivalent to directly detecting the two detection beams without changing the propagation directions of the detection beam and the reference beam, so that whether the sound field generating device deviates from the set position can be better determined.
In a further embodiment, the distance between the second beam splitter 12 and the first position sensor 31 is equal to the distance between the third beam splitter 13 and the second position sensor 32. At this time, when the sound source 22 is not turned on or when the sound source 22 sounds at a lower frequency, the deflection distance and the deflection angle of the light spots on the first position sensor 31 and the second position sensor 32 are the same.
As shown in fig. 3, as a preferred embodiment of the present invention, the laser light emitted by the pulse laser 10 is split into a measuring beam and a reference beam by the first beam splitter 11, and after the measuring beam passes through the sound field and the reference beam is reflected by the first reflecting mirror 14 and the second reflecting mirror 15 in sequence, the measuring beam and the reference beam are combined into a first combined laser light by the second beam splitter 12; the first detection beam is reflected by the measuring beam by 90 ° through the fourth spectroscope 16 and received by the first position sensor 31, and the second detection beam is reflected by the reference beam by 90 ° through the fifth spectroscope 17 and received by the second position sensor 32; the distance between the first spectroscope 11 and the fourth spectroscope 16 is equal to the distance between the first reflecting mirror 14 and the fifth spectroscope 17; the distance between the fourth spectroscope 16 and the first position sensor 31 is equal to the distance between the fifth spectroscope 17 and the second position sensor 32.
In the present embodiment, a fourth spectroscope 16 is provided between the first spectroscope 11 and the second spectroscope 12, a fifth spectroscope 17 is provided between the first reflecting mirror 14 and the second reflecting mirror 15, the measuring beam is reflected by the fourth spectroscope 16 to be outputted as a first detecting beam, and the reference beam is reflected by the fifth spectroscope 17 to be outputted as a second detecting beam. At this time, the first position sensor 31 and the second position sensor 32 receive the first detection beam and the second detection beam, respectively, which corresponds to detecting the refracted detection beam and the reference beam, and further, it is possible to determine whether the sound field generating device deviates from the set position.
As a preferred embodiment of the present invention, the medium container 21 contains a medium to be measured, the sound source 22 is an ultrasonic transducer, and the medium container 21 and the ultrasonic transducer have the same width, so that the sound wave emitted by the ultrasonic transducer is an approximate plane wave: the medium container 21 extends in the same direction as the sound wave propagation direction. The ultrasonic transducer can generate sound waves with the same width, and when the width of the medium container 21 is the same as that of the ultrasonic transducer, the sound waves emitted by the ultrasonic transducer hardly rebound on the inner wall of the medium container 21 to break the waveform, so that the interference of the medium container 21 is reduced.
As a preferred embodiment of the invention the detection means further comprise position determination means 33, said position determination means 33 being arranged to determine the deflection of the first detection beam at the first position sensor 31 and the deflection of the second detection beam at the second position sensor 32. The light spots of the first detection beam and the second detection beam detected by the position sensor are processed, and the light spots formed on the position sensor are obtained by the position determining device 33, so that the sound source 22 or the medium container 21 of the sound field generating device is adjusted to enable the position relation between the sound field and the two laser beams to be more accurate, and the position relation between the sound field and the measuring beam and the reference beam to be more accurate.
The position determining means 33 may be a microcomputer, may comprise a processor, a memory or the like, and may execute a program to perform processing on signals formed by light spots on the first position sensor and the second position sensor, and may issue control instructions, such as controlling the adjusting means to adjust the position of the sound field generating means.
As shown in fig. 4, as a preferred embodiment of the present invention, the sound speed accurate measurement device further includes an adjustment device connected to the sound field generation device for adjusting the relative positional relationship between the laser measurement device and the sound field generation device according to the measurement result of the detection device. In this embodiment, one end of the medium container 21 may be fixed to a moving stage, which is capable of adjusting the medium container 21 in six degrees of freedom, that is, adjusting the spatial position of the medium container 21; the control of the mobile stage can be realized according to the detection result of the detection device, for example, control data can be actively output according to the detection result of the position determination device 33, and the adjustment device is controlled to adjust the medium container 21; the adjustment device can be controlled to slightly adjust the adjustment device, and according to the feedback of the position determining device 33, whether the adjustment is to be performed to a proper position or not can be determined, and the adjustment device can continue to perform adjustment until the medium container 21 is adjusted to the proper position.
As shown in fig. 1, as a preferred embodiment of the present invention, the laser light emitted by the pulse laser 10 is split into a measuring beam and a reference beam by the first beam splitter 11, and after the measuring beam passes through the sound field and the reference beam is reflected by the first reflecting mirror 14 and the second reflecting mirror 15 in sequence, the measuring beam and the reference beam are combined into a first combined laser light by the second beam splitter 12. The laser measuring device further comprises a distance measuring device, the distance measuring device comprises a displacement table 41, a plurality of spectroscopes and a continuous interference device 49, one end of the displacement table 41 is provided with a third reflecting mirror 42, the other end of the displacement table is provided with a fourth reflecting mirror 43, a sixth spectroscope 44 is arranged between the pulse laser 10 and the first spectroscope 11, a seventh spectroscope 45 is arranged between the sixth spectroscope 44 and the displacement table 41, one beam of laser emitted by the sixth spectroscope 44 is transmitted out of the seventh spectroscope 45, and after being reflected by the third reflecting mirror 42, the laser is refracted by the seventh spectroscope 45 and then combined, and the laser combined by the seventh spectroscope 45 is interfered with the first combined laser again; when the optical path of the laser from the third reflecting mirror 42 to the eighth spectroscope 46 through the seventh spectroscope 45 is equal to the optical path of the laser from the sixth spectroscope 44 to the eighth spectroscope 46 through the first spectroscope 11 through the second spectroscope 12, the first interference occurs; when the optical path of the laser beam from the third mirror 42 through the seventh beam splitter 45 to the eighth beam splitter 46 is equal to the optical path of the laser beam from the sixth beam splitter 44 through the first beam splitter 11 through the first mirror 14 through the second mirror 15 through the second beam splitter 12 to the eighth beam splitter 46, the second interference occurs, and the continuous interference device 49 is used as a reference for the two interference. A fifth reflecting mirror 47 may be further disposed between the third reflecting mirror 42 and the seventh beam splitter 45, and a sixth reflecting mirror 48 may be further disposed between the eighth beam splitter 46 and the photodetector 18, where the fifth reflecting mirror 47 and the sixth reflecting mirror 48 are used for changing the direction of the light path so as to reasonably arrange the positions of the components.
In the preferred embodiment, the optical path difference between the reference beam and the measuring beam is measured by the distance measuring device, and the flight distance of the sound wave propagating between the measuring beam and the reference beam in the sound field is calculated equivalently. The continuous interference device 49 may include a separate continuous laser transmitter (CW 3) and a mirror, beam splitter, photodetector 18 (PD 2), etc., where the continuous light emitted by the continuous interference device 49 can continue to interfere. The first interference and the second interference are essentially interference with the measuring beam and the reference beam, two interference signals can be obtained, and the number of interference fringes of continuous light between the two peaks is calculated by locking the peaks of the two interference signals, so that the flight distance of the sound wave is obtained. The flight time of the sound wave is determined by the signal generated by the sound wave after acting on the reference beam and the measuring beam, so as to calculate the propagation speed of the sound wave in the medium.
In this embodiment, the detection method may be applied to a computer device, where the computing device may be a position determining device, the position determining device may be used to control an adjusting device, where the accurate sound velocity measuring device includes the position determining device and the adjusting device, and the adjusting mode may be to actively output control data according to a detection result of the position determining device, and control the adjusting device to adjust the medium container; the device can also be controlled to finely adjust the adjusting device in a small amplitude, and according to the feedback of the position determining device, whether the medium container is adjusted to a proper position is determined, and the adjusting device continues to adjust until the medium container is adjusted to the proper position. The processing efficiency is improved by automatically adjusting the relative position relation between the measuring beam and the sound field in the detection laser measuring device.
The embodiment of the invention also provides a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the processor is caused to execute the following steps:
acquiring offset data of forming light spots on a position sensor of two laser beams in the laser measuring device provided in any embodiment;
confirming whether the offset distance and the offset angle of the two laser beams are the same according to the offset data;
judging whether the relative position relation between the measuring beam and the sound field generating device in the laser measuring device is accurate or not;
and if the sound field generation device is inaccurate, controlling the adjusting device to adjust the position of the sound field generation device.
The embodiment of the invention also provides computer equipment which comprises a processor, a memory, a network interface, an input device and a display screen which are connected through a system bus. The memory includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system, and may also store a computer program that, when executed by a processor, causes the processor to implement a method of detecting a sound speed accurate measurement device. The internal memory may also store a computer program that, when executed by the processor, causes the processor to perform the method of detecting the sound speed accurate measurement device.
The embodiment of the invention also provides a sound velocity accurate measurement device, and provides a detection method and a storage medium of the sound velocity accurate measurement device based on the sound velocity accurate measurement device, the sound velocity is measured through the cooperation between the laser measurement device and the sound field generation device, and whether the relative position between the laser measurement device and the sound field generation device is accurate or not is confirmed through the detection device, so that the relative position is adjusted, and the accuracy of sound velocity measurement is improved; the relative position between the laser measuring device and the sound field generating device is automatically adjusted through the adjusting device, so that the processing efficiency is improved; the optical path difference between the reference beam and the measuring beam is measured through the distance measuring device, so that the flying distance of the sound wave is measured more accurately; the method ensures that the propagation speed of the final sound wave in the medium to be measured is more accurate.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Those skilled in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and where the program, when executed, may include processes in the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. An accurate sound speed measuring device, characterized in that the accurate sound speed measuring device comprises: a laser measuring device, a sound field generating device and a detecting device;
the laser measuring device comprises a pulse laser, a plurality of spectroscopes, a plurality of reflecting mirrors and a photoelectric detector, wherein laser emitted by the pulse laser is split into a measuring beam and a reference beam through the spectroscopes, passes through a sound field generated by the sound field generating device, is combined through the spectroscopes and is received by the photoelectric detector, and the reflecting mirrors are used for changing the path of the reference beam;
the sound field generating device comprises a sound source and a medium container, wherein the sound source is arranged in the medium container and is used for generating sound waves, and the sound waves form a sound field in the medium container;
the detection device comprises two position sensors, the position sensors are used for respectively receiving a first detection light beam and a second detection light beam, the first detection light beam is led out by one spectroscope after passing through the sound field by a measurement light beam, the second detection light beam is led out by the other spectroscope after passing through the sound field by a reference light beam, and whether the sound field generating device deviates from a set position is determined by comparing deflection conditions of the first detection light beam and the second detection light beam on the position sensors.
2. The precise sound velocity measuring device according to claim 1, wherein the laser emitted by the pulse laser is divided into a measuring beam and a reference beam by a first spectroscope, and after the measuring beam passes through a sound field and the reference beam is reflected by the first reflecting mirror and a third spectroscope in sequence, the measuring beam and the reference beam are combined into a first combined laser by a second spectroscope; the first detection light beam is transmitted by the measuring light beam through the second spectroscope and received by the first position sensor, the second detection light beam is transmitted by the reference light beam through the third spectroscope and received by the second position sensor, the first spectroscope, the second spectroscope and the first position sensor are positioned on the same straight line, and the first reflecting mirror, the third spectroscope and the second position sensor are positioned on the same straight line.
3. The precise sound velocity measuring device according to claim 1, wherein the laser emitted by the pulse laser is divided into a measuring beam and a reference beam by a first spectroscope, and after the measuring beam passes through a sound field and the reference beam is reflected by a first reflecting mirror and a second reflecting mirror in sequence, the measuring beam and the reference beam are combined into a first combined laser by the second spectroscope; the first detection light beam is reflected by the measuring light beam by 90 degrees through the fourth spectroscope and is received by the first position sensor, and the second detection light beam is reflected by the reference light beam by 90 degrees through the fifth spectroscope and is received by the second position sensor; the distance between the first spectroscope and the fourth spectroscope is equal to the distance between the first reflecting mirror and the fifth spectroscope; the distance between the fourth spectroscope and the first position sensor is equal to the distance between the fifth spectroscope and the second position sensor.
4. The precise sound velocity measuring device according to claim 1, wherein the medium container is filled with a medium to be measured, the sound source is an ultrasonic transducer, the medium container and the ultrasonic transducer are the same in width, and the extending direction of the medium container is the same as the sound wave propagation direction.
5. The precise measuring device of claim 2, wherein the distance between the second beam splitter and the first position sensor is equal to the distance between the third beam splitter and the second position sensor.
6. A sound speed accurate measurement device according to claim 2 or claim 3 wherein the detection means further comprises position determination means for determining the deflection of the first detection beam at a first position sensor and the deflection of the second detection beam at the second position sensor.
7. A sound speed accurate measurement apparatus according to claim 2 or 3, further comprising adjustment means connected to the sound field generation means for adjusting the relative positional relationship between the laser measurement means and the sound field generation means in accordance with the measurement result of the detection means.
8. The precise sound velocity measuring device according to claim 2 or 3, wherein the laser measuring device further comprises a distance measuring device, the distance measuring device comprises a displacement table, a plurality of spectroscopes and a continuous interference device, a third reflecting mirror is arranged at one end of the displacement table, a fourth reflecting mirror is arranged at the other end of the displacement table, a sixth spectroscope is arranged between the pulse laser and the first spectroscope, a seventh spectroscope is arranged between the sixth spectroscope and the displacement table, a beam of laser emitted by the sixth spectroscope is transmitted by the seventh spectroscope, reflected back to the seventh spectroscope by the third reflecting mirror and reflected, and then interfered with the first combined beam of laser again by the eighth spectroscope; when the optical path from the third reflecting mirror to the eighth spectroscope through the seventh spectroscope is equal to the optical path from the sixth spectroscope to the eighth spectroscope through the first spectroscope through the second spectroscope, the first interference occurs; when the optical path from the third spectroscope to the eighth spectroscope through the seventh spectroscope is equal to the optical path from the sixth spectroscope to the eighth spectroscope through the first spectroscope through the second spectroscope, the second interference occurs, and the continuous interference device is used as a reference standard for the two interference.
9. A method for detecting a sound velocity accurate measurement device, the method comprising:
acquiring offset data of the formed spots of the first detection beam and the second detection beam on the position sensor according to any one of claims 1 to 8;
confirming whether the offset distance and the offset angle of the first detection light beam and the second detection light beam are the same according to the offset data;
judging whether the relative position relation among the measuring beam, the reference beam and the sound field generating device in the laser measuring device is accurate or not;
and if the sound field generation device is inaccurate, controlling the adjusting device to adjust the position of the sound field generation device.
10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, which when executed by a processor causes the processor to perform the steps of a sound speed accurate measurement device detection method according to claim 9.
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