阅读说明：本技术 一种用于多角度回声降低测量的机械回转装置及控制方法 (Mechanical rotation device for multi-angle echo reduction measurement and control method ) 是由 李建龙 马骁晨 于 2021-07-26 设计创作，主要内容包括：本发明公开了一种用于多角度回声降低测量的机械回转装置及控制方法,包括总支架；第一、第二、第三回转承重机构以及回转传动机构,均安装在所述总支架上；传动机构,其输入端与所述回转传动机构耦合,回转传动机构输出端与所述第一回转承重机构和所述第二回转承重机构耦合,所述第一回转承重机构输出端的角速度为所述第二回转承重机构输出端的两倍；第一子支架,固定在所述第一回转承重机构的下端；第二子支架,固定在所述第二回转承重机构的下端；第三子支架,固定在所述第二回转承重机构的下端；滑动杆机构,固定在所述第一子支架上；自由回转联动轴机构,其一端套接在所述滑动杆机构上,另一端套接在所述第二子支架上。(The invention discloses a mechanical slewing device for multi-angle echo reduction measurement and a control method, comprising a main bracket; the first, second and third rotary bearing mechanisms and the rotary transmission mechanism are all arranged on the main bracket; the input end of the transmission mechanism is coupled with the rotary transmission mechanism, the output end of the rotary transmission mechanism is coupled with the first rotary bearing mechanism and the second rotary bearing mechanism, and the angular speed of the output end of the first rotary bearing mechanism is twice of that of the output end of the second rotary bearing mechanism; the first sub-bracket is fixed at the lower end of the first rotary bearing mechanism; the second sub-bracket is fixed at the lower end of the second rotary bearing mechanism; the third sub-bracket is fixed at the lower end of the second rotary bearing mechanism; the sliding rod mechanism is fixed on the first sub-bracket; one end of the free rotation universal driving shaft mechanism is sleeved on the sliding rod mechanism, and the other end of the free rotation universal driving shaft mechanism is sleeved on the second sub-support.)

1. A mechanical gyroscope for multi-angle echo reduction measurements, comprising:

a main frame;

a first rotary load bearing mechanism mounted on the main frame;

a second rotary load bearing mechanism mounted on the main frame;

a third rotary load bearing mechanism mounted on the main frame;

the rotary transmission mechanism is arranged on the main bracket;

the input end of the transmission mechanism is coupled with the rotary transmission mechanism, the output end of the rotary transmission mechanism is coupled with the first rotary bearing mechanism and the second rotary bearing mechanism, and the angular speed of the output end of the first rotary bearing mechanism is twice of that of the output end of the second rotary bearing mechanism;

the first sub-bracket is fixed at the lower end of the first rotary bearing mechanism;

the second sub-bracket is fixed at the lower end of the second rotary bearing mechanism;

the third sub-bracket is fixed at the lower end of the second rotary bearing mechanism;

the sliding rod mechanism is fixed on the first sub-bracket; and

and one end of the free rotation universal driving shaft mechanism is sleeved on the sliding rod mechanism, and the other end of the free rotation universal driving shaft mechanism is sleeved on the second sub-support.

2. The mechanical slewing device of claim 1, wherein said main support comprises:

a support base;

the first cross beam plate is fixed on the bracket base;

one end of the first vertical beam plate is fixed at two ends of the upper surface of the first transverse beam plate;

one end of the second vertical beam plate is fixed in the middle of the upper surface of the first transverse beam plate;

the second cross beam plate is supported and fixed at the other ends of the first vertical beam plate and the second vertical beam plate;

one end of the third vertical beam plate is fixed on the second transverse beam plate;

the third cross beam plate is supported and fixed at the other end of the third vertical beam plate;

the first lifting ring nut is fixed with the left end of the second cross beam plate through threads;

and the second lifting ring nut is fixed with the right end of the second cross beam plate through threads.

3. The mechanical slewing device of claim 1, wherein the first slewing bearing mechanism comprises:

the first bearing seat is fixed on the main bracket;

a first thrust ball bearing mounted on the first bearing block;

the first bearing seat is fixed on the main bracket;

a second thrust ball bearing mounted on the second bearing block;

and the first rotary bearing rod is sleeved and supported on the first thrust ball bearing and the second thrust ball bearing.

4. The mechanical slewing device of claim 1, wherein the second slewing bearing mechanism comprises:

a third bearing block fixed to the main frame;

a third thrust ball bearing mounted on the third bearing block;

the fourth bearing seat is fixed on the main bracket;

the fourth thrust ball bearing is arranged on the fourth bearing seat;

and the second rotary bearing rod is sleeved and supported on the third thrust ball bearing and the fourth thrust ball bearing.

5. The mechanical slewing device of claim 1, wherein the third slewing bearing mechanism comprises:

the fifth bearing seat is fixed on the main bracket;

the fifth thrust ball bearing is mounted on the fifth bearing seat;

the sixth bearing seat is fixed on the general bracket;

a sixth thrust ball bearing mounted on the sixth bearing block;

and the third rotary bearing rod is sleeved and supported on the fifth thrust ball bearing and the sixth thrust ball bearing.

6. The mechanical slewing device of claim 1, wherein the slewing gear comprises:

the seventh bearing seat is fixed on the main bracket;

the seventh thrust ball bearing is mounted on the seventh bearing seat;

the eighth bearing block is fixed on the main bracket;

the eighth thrust ball bearing is mounted on the eighth bearing block;

and the rotary transmission rod is sleeved and supported on the seventh thrust ball bearing and the eighth thrust ball bearing.

7. The mechanical slewing device of claim 1, wherein the transmission mechanism comprises:

the first speed reducer is fixed on the main support, and the output end of the first speed reducer is coupled with the input end of the rotary transmission mechanism;

the first shaking hand wheel is matched with the input end of the first speed reducer and controls the output quantity of the first speed reducer; the first straight-tooth cylindrical gear is sleeved at the output end of the first rotary bearing mechanism;

the second straight-tooth cylindrical gear is sleeved at the output end of the rotary transmission mechanism, the first straight-tooth cylindrical gear is meshed with the second straight-tooth cylindrical gear, and the number of teeth of the first straight-tooth cylindrical gear is the same as that of the second straight-tooth cylindrical gear;

the third straight-tooth cylindrical gear is sleeved at the output end of the second rotary bearing mechanism and is meshed with the second straight-tooth cylindrical gear, and the number of teeth of the third straight-tooth cylindrical gear is twice that of the second straight-tooth cylindrical gear;

the second speed reducer is fixed on the main support, and the output end of the second speed reducer is coupled with the input end and the output end of the third rotary bearing mechanism;

and the second shaking hand wheel is matched with the input end of the second speed reducer and controls the output quantity of the second speed reducer.

8. The mechanical swing device according to claim 1, wherein the sliding bar mechanism comprises:

a bevel assembly secured to the first sub-mount;

the straight angle component is fixed on the first sub-bracket;

the cylindrical sliding rod is sleeved and fixed on the oblique angle component and the straight angle component;

the linear bearing is sleeved on the cylindrical sliding rod;

and one end of the fixed rod mechanism is sleeved and fixed on the linear bearing.

9. The mechanical slewing device of claim 1, wherein said freewheeling linkage mechanism comprises:

the bottom of the first connecting flange is fixed at the lower end of the second sub-bracket;

the upper end of the longitudinal free rotating shaft is fixed at the top of the first connecting flange;

the top of the second connecting flange is fixed at the bottom of the longitudinal free rotating shaft;

the first rolling bearing is sleeved and supported at the upper part of the longitudinal free rotating shaft;

the second rolling bearing is sleeved and supported at the upper part of the longitudinal free rotating shaft;

the free rotary outer ring is sleeved and fixed on the outer edges of the first rolling bearing and the second rolling bearing;

one end of the transverse free revolving shaft is fixed on the outer surface of the free revolving outer ring;

and the third rolling bearing is sleeved on the sliding rod mechanism.

10. The method for controlling a multi-angle echo-reducing measuring mechanical slewing device according to claim 1, comprising the steps of:

(1) fixing the incident angle direction of a sound source, mounting a sample to be tested on the second sub-bracket, and mounting a first hydrophone on the sliding rod mechanism to ensure that the sound source, the sample to be tested and the first hydrophone are placed in sequence;

(2) presetting the incident angle of the sample to be tested, inputting the incident angle information into the rotary transmission mechanism through the transmission mechanism, the rotary transmission mechanism outputs the angle information to the first rotary bearing mechanism and the second rotary bearing mechanism, the first rotary bearing mechanism and the second rotary bearing mechanism respectively drive the first sub-bracket and the second sub-bracket to rotate in corresponding angle and angle relation, finally the first sub-bracket outputs the angle information to the sliding rod mechanism and controls the first hydrophone to rotate in a preset angle, the second sub-bracket outputs the angle information to the sample to be tested and controls the sample to be tested to rotate according to the corresponding angle relation, therefore, the collection of the reflected signal of the sample to be measured under the condition of meeting the reflection law can be realized, and the measurement result of multi-angle echo reduction is calculated;

(3) meanwhile, a second hydrophone is installed on the third sub-support to collect transmission signals, the collection angle of the transmission signals is preset, the incident angle information is input into the third rotary bearing mechanism through the transmission mechanism, the third rotary bearing mechanism drives the third sub-support to rotate by a corresponding angle, finally the third sub-support outputs the angle information to the second hydrophone and controls the second hydrophone to rotate by a preset angle, so that the transmission signals of the samples to be measured at different angular positions can be measured and obtained under the condition of fixing the incident angle, and the multi-angle insertion loss measurement result of the samples to be measured can be obtained through synchronous measurement and calculation while the multi-angle echo reduction measurement result is obtained.

Technical Field

The invention relates to the technical field of echo signal measurement, in particular to a mechanical rotating device for multi-angle echo reduction measurement and a control method.

Background

The acoustic stealth performance of an underwater acoustic passive material is closely related to acoustic performance parameters of the material, and in general, the acoustic stealth performance of a material can be evaluated by measuring the echo reduction and insertion loss of the material. Since the underwater sound passive material can show different echo reduction and insertion loss magnitudes under different incident angles, before practical application, the echo reduction and insertion loss of the sample to be measured under different incident angles need to be measured. Echo reduction and insertion loss of a sample to be measured cannot be directly measured and obtained in a large pressure silencing water tank in a laboratory, but the suppression effect of an underwater sound passive material on an acoustic signal can be measured by measuring the echo variation (namely 'echo reduction') and the sound transmission variation (namely 'insertion loss') of the sample before and after the underwater sound passive material is laid on the underwater acoustic component under the same incident sound wave condition.

At present, the research on multi-angle echo reduction measurement of a large underwater sound passive material sample under the condition of a large pressure silencing water tank in a laboratory is less in China.

In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:

under the environment of a large-scale pressure silencing water tank, the problem of accurate control of an incident angle and a reflection angle needs to be solved; under the environment of a large-scale pressure silencing water tank, the conventional echo reduction and insertion loss measurement is carried out under the condition of multi-needle normal incidence, and the research on the mechanical rotating device suitable for the underwater sound passive material multi-angle echo reduction measurement needs to be carried out urgently; a mechanical control device capable of synchronously realizing echo reduction and insertion loss measurement of a sample to be measured is in urgent need of development.

Disclosure of Invention

In view of this, the embodiment of the present invention provides a mechanical slewing device and a control method for multi-angle echo reduction measurement, which can meet the measurement requirements of multi-angle echo reduction and insertion loss of underwater sound passive materials under the condition of a large pressure muffling water tank in a laboratory, and improve the measurement efficiency and the measurement precision.

According to a first aspect of embodiments of the present invention, there is provided a mechanical gyroscope for multi-angle echo-reduction measurement, comprising:

a main frame;

a first rotary load bearing mechanism mounted on the main frame;

a second rotary load bearing mechanism mounted on the main frame;

a third rotary load bearing mechanism mounted on the main frame;

the rotary transmission mechanism is arranged on the main bracket;

the input end of the transmission mechanism is coupled with the rotary transmission mechanism, the output end of the rotary transmission mechanism is coupled with the first rotary bearing mechanism and the second rotary bearing mechanism, and the angular speed of the output end of the first rotary bearing mechanism is twice of that of the output end of the second rotary bearing mechanism;

the first sub-bracket is fixed at the lower end of the first rotary bearing mechanism;

the second sub-bracket is fixed at the lower end of the second rotary bearing mechanism;

the third sub-bracket is fixed at the lower end of the second rotary bearing mechanism;

the sliding rod mechanism is fixed on the first sub-bracket; and

and one end of the free rotation universal driving shaft mechanism is sleeved on the sliding rod mechanism, and the other end of the free rotation universal driving shaft mechanism is sleeved on the second sub-support.

Optionally, the overall frame includes:

a support base;

the first cross beam plate is fixed on the bracket base;

one end of the first vertical beam plate is fixed at two ends of the upper surface of the first transverse beam plate;

one end of the second vertical beam plate is fixed in the middle of the upper surface of the first transverse beam plate;

the second cross beam plate is supported and fixed at the other ends of the first vertical beam plate and the second vertical beam plate;

one end of the third vertical beam plate is fixed on the second transverse beam plate;

the third cross beam plate is supported and fixed at the other end of the third vertical beam plate;

the first lifting ring nut is fixed with the left end of the second cross beam plate through threads;

and the second lifting ring nut is fixed with the right end of the second cross beam plate through threads.

Optionally, the first slewing bearing mechanism comprises:

the first bearing seat is fixed on the main bracket;

a first thrust ball bearing mounted on the first bearing block;

the first bearing seat is fixed on the main bracket;

a second thrust ball bearing mounted on the second bearing block;

and the first rotary bearing rod is sleeved and supported on the first thrust ball bearing and the second thrust ball bearing.

Optionally, the second slewing bearing mechanism comprises:

a third bearing block fixed to the main frame;

a third thrust ball bearing mounted on the third bearing block;

the fourth bearing seat is fixed on the main bracket;

the fourth thrust ball bearing is arranged on the fourth bearing seat;

and the second rotary bearing rod is sleeved and supported on the third thrust ball bearing and the fourth thrust ball bearing.

Optionally, the third slewing bearing mechanism comprises:

the fifth bearing seat is fixed on the main bracket;

the fifth thrust ball bearing is mounted on the fifth bearing seat;

the sixth bearing seat is fixed on the general bracket;

a sixth thrust ball bearing mounted on the sixth bearing block;

and the third rotary bearing rod is sleeved and supported on the fifth thrust ball bearing and the sixth thrust ball bearing.

Optionally, the rotation transmission mechanism includes:

the seventh bearing seat is fixed on the main bracket;

the seventh thrust ball bearing is mounted on the seventh bearing seat;

the eighth bearing block is fixed on the main bracket;

the eighth thrust ball bearing is mounted on the eighth bearing block;

and the rotary transmission rod is sleeved and supported on the seventh thrust ball bearing and the eighth thrust ball bearing.

Optionally, the transmission mechanism includes:

the first speed reducer is fixed on the main support, and the output end of the first speed reducer is coupled with the input end of the rotary transmission mechanism;

the first shaking hand wheel is matched with the input end of the first speed reducer and controls the output quantity of the first speed reducer; the first straight-tooth cylindrical gear is sleeved at the output end of the first rotary bearing mechanism;

the second straight-tooth cylindrical gear is sleeved at the output end of the rotary transmission mechanism, the first straight-tooth cylindrical gear is meshed with the second straight-tooth cylindrical gear, and the number of teeth of the first straight-tooth cylindrical gear is the same as that of the second straight-tooth cylindrical gear;

the third straight-tooth cylindrical gear is sleeved at the output end of the second rotary bearing mechanism and is meshed with the second straight-tooth cylindrical gear, and the number of teeth of the third straight-tooth cylindrical gear is twice that of the second straight-tooth cylindrical gear;

the second speed reducer is fixed on the main support, and the output end of the second speed reducer is coupled with the input end and the output end of the third rotary bearing mechanism;

and the second shaking hand wheel is matched with the input end of the second speed reducer and controls the output quantity of the second speed reducer.

Optionally, the sliding bar mechanism comprises:

a bevel assembly secured to the first sub-mount;

the straight angle component is fixed on the first sub-bracket;

the cylindrical sliding rod is sleeved and fixed on the oblique angle component and the straight angle component;

the linear bearing is sleeved on the cylindrical sliding rod;

and one end of the fixed rod mechanism is sleeved and fixed on the linear bearing.

Optionally, the free-wheeling universal driving shaft mechanism includes:

the bottom of the first connecting flange is fixed at the lower end of the second sub-bracket;

the upper end of the longitudinal free rotating shaft is fixed at the top of the first connecting flange;

the top of the second connecting flange is fixed at the bottom of the longitudinal free rotating shaft;

the first rolling bearing is sleeved and supported at the upper part of the longitudinal free rotating shaft;

the second rolling bearing is sleeved and supported at the upper part of the longitudinal free rotating shaft;

the free rotary outer ring is sleeved and fixed on the outer edges of the first rolling bearing and the second rolling bearing;

one end of the transverse free revolving shaft is fixed on the outer surface of the free revolving outer ring;

and the third rolling bearing is sleeved on the sliding rod mechanism.

According to a second aspect of the embodiments of the present invention, there is provided a control method for a multi-angle echo-reduction measuring mechanical slewing device, including the steps of:

(1) fixing the incident angle direction of a sound source, mounting a sample to be tested on the second sub-bracket, and mounting a first hydrophone on the sliding rod mechanism to ensure that the sound source, the sample to be tested and the first hydrophone are placed in sequence;

(2) presetting the incident angle of the sample to be tested, inputting the incident angle information into the rotary transmission mechanism through the transmission mechanism, the rotary transmission mechanism outputs the angle information to the first rotary bearing mechanism and the second rotary bearing mechanism, the first rotary bearing mechanism and the second rotary bearing mechanism respectively drive the first sub-bracket and the second sub-bracket to rotate in corresponding angle and angle relation, finally the first sub-bracket outputs the angle information to the sliding rod mechanism and controls the first hydrophone to rotate in a preset angle, the second sub-bracket outputs the angle information to the sample to be tested and controls the sample to be tested to rotate according to the corresponding angle relation, therefore, the collection of the reflected signal of the sample to be measured under the condition of meeting the reflection law can be realized, and the measurement result of multi-angle echo reduction is calculated;

(3) meanwhile, a second hydrophone is installed on the third sub-support to collect transmission signals, the collection angle of the transmission signals is preset, the incident angle information is input into the third rotary bearing mechanism through the transmission mechanism, the third rotary bearing mechanism drives the third sub-support to rotate by a corresponding angle, finally the third sub-support outputs the angle information to the second hydrophone and controls the second hydrophone to rotate by a preset angle, so that the transmission signals of the samples to be measured at different angular positions can be measured and obtained under the condition of fixing the incident angle, and the multi-angle insertion loss measurement result of the samples to be measured can be obtained through synchronous measurement and calculation while the multi-angle echo reduction measurement result is obtained.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

by controlling the rotation angle of the transmission mechanism, the problem of overlarge labor consumption in the process of manually adjusting the rotation angle is solved, and the effect of saving labor is further achieved; the rotation relation among all the parts is controlled in a linkage way through the rotary transmission mechanism, the sliding rod mechanism and the free rotary universal driving shaft mechanism, so that the control and realization of the relation between the incident angle and the reflection angle which meets the reflection law are realized, the problem of angle position errors generated in the process of independently adjusting the relative positions of all the parts is solved, and the effect of accurately controlling the incident angle and the reflection angle of a signal is further achieved;

the transmission mechanism is used for controlling the angle input of the mechanical rotation device, so that the angle information is output to the first rotation bearing mechanism and the second rotation bearing mechanism, the first rotation bearing mechanism and the second rotation bearing mechanism respectively drive the first sub-support and the second sub-support to rotate in a corresponding angle and angle relation, finally the first sub-support outputs the angle information to the sliding rod mechanism and controls the first hydrophone to rotate in a preset angle, and the second sub-support outputs the angle information to the sample to be tested and controls the sample to be tested to rotate in a corresponding angle relation, so that the effect of accurately controlling the incident signal acquisition angle and the reflected signal acquisition angle of the sample to be tested is achieved; through install first hydrophone on the dead lever mechanism install the second hydrophone on the third sub-support respectively, overcome in practice the problem that multi-angle echo reduction and multi-angle insertion loss synchronous measurement are difficult to realize, and then reach the effect that improves measurement efficiency and improve the measuring result accuracy.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic diagram of a mechanical gyroscope for multi-angle echo reduction measurements according to an exemplary embodiment.

FIG. 2 is a top view of a mechanical gyroscope configuration for multi-angle echo reduction measurements, shown in accordance with an exemplary embodiment.

FIG. 3 is a cross-sectional view of a mechanical gyroscope apparatus configured for multi-angle echo-reduction measurements, according to an exemplary embodiment.

Fig. 4 is a partially enlarged view at I in fig. 3.

Fig. 5 is a partial enlarged view at II in fig. 3.

The reference numerals in the figures are:

1. a support base; 2. a first beam panel; 3. a first vertical beam panel; 4. a second vertical beam panel; 5. a second beam panel; 6. a third vertical beam plate; 7. a third beam panel; 8. a first eye nut; 9. a second eyenut; 10. a first sub-mount; 11. a second sub-mount; 12. a third sub-mount; 13. a tank opening of the large-sized pressure silencing water tank; 14. a bevel assembly; 15. a cylindrical slide bar; 16. a sample to be tested; 17. a first bearing housing; 18. a first thrust ball bearing; 19. a second bearing housing; 20. a second thrust ball bearing; 21. a first rotating load-bearing bar; 22. a third bearing seat; 23. a third thrust ball bearing; 24. a fourth bearing seat; 25. a fourth thrust ball bearing; 26. a second rotating load bearing bar; 27. a fifth bearing seat; 28. a fifth thrust ball bearing; 29. a sixth bearing housing; 30. a sixth thrust ball bearing; 31. a third rotary load-bearing bar; 32. a seventh bearing seat; 33. a seventh thrust ball bearing; 34. an eighth bearing seat; 35. an eighth thrust ball bearing; 36. a rotary drive rod; 37. a first speed reducer; 38. a first rocking hand wheel; 39. a second spur gear; 40. a first spur gear; 41. a third spur gear; 42. a second speed reducer; 43. a second rocking hand wheel; 44. a flat angle component; 45. a linear bearing; 46. a cylindrical fixing rod; 47. a first connecting flange; 48. a longitudinal free rotating shaft; 49. a second connecting flange; 50. a first rolling bearing; 51. a second rolling bearing; 52. a freely rotating outer ring; 53. a transverse free rotating shaft; 54. a third rolling bearing; 55. a load-bearing connector.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

As shown in fig. 1 to 5, an embodiment of the present invention provides a mechanical slewing device for multi-angle echo reduction measurement, which may include: the device comprises a main support, a first rotary bearing mechanism, a second rotary bearing mechanism, a third rotary bearing mechanism, a rotary transmission mechanism, a first sub-support 10, a second sub-support 11, a third sub-support 12, a sliding rod mechanism and a free rotary universal driving shaft mechanism, wherein the main support is used for fixing the mechanical rotary device; the first rotary load-bearing mechanism is supported on the main bracket; the second rotary load-bearing mechanism is supported on the main bracket; the third rotary load-bearing mechanism is supported on the main bracket; the rotary transmission mechanism is supported on the general bracket; the input end of the transmission mechanism is coupled with the rotary transmission mechanism, the output end of the rotary transmission mechanism is coupled with the first rotary bearing mechanism and the second rotary bearing mechanism, and the angular speed of the output end of the first rotary bearing mechanism is twice of that of the output end of the second rotary bearing mechanism; the first sub-bracket 10 is fixed at the lower end of the first rotary load-bearing mechanism; the second sub-bracket 11 is fixed at the lower end of the second rotary load-bearing mechanism; the third sub-bracket 12 is fixed at the lower end of the second rotary load-bearing mechanism; the sliding rod mechanism is fixed on the first sub-bracket 10; one end of the free rotation universal driving shaft mechanism is sleeved on the sliding rod mechanism, and the other end of the free rotation universal driving shaft mechanism is sleeved on the second sub-support 11.

According to the embodiment, the problem of overlarge labor consumption in the process of manually adjusting the rotating angle is solved by controlling the rotating angle of the transmission mechanism, so that the effect of saving labor is achieved; the rotation relation among all the parts is controlled in a linkage way through the rotary transmission mechanism, the sliding rod mechanism and the free rotary universal driving shaft mechanism, so that the control and realization of the relation between the incident angle and the reflection angle which meets the reflection law are realized, the problem of angle position errors generated in the process of independently adjusting the relative positions of all the parts is solved, and the effect of accurately controlling the incident angle and the reflection angle of a signal is further achieved; the angle input of the mechanical slewing device is controlled through the transmission mechanism, so that the angle information is output to the first slewing bearing mechanism and the second slewing bearing mechanism, the first slewing bearing mechanism and the second slewing bearing mechanism respectively drive the first sub-bracket 10 and the second sub-bracket 11 to rotate according to the corresponding angle and the angle relation, finally the first sub-bracket 10 outputs the angle information to the sliding rod mechanism and controls the first hydrophone to rotate by a preset angle, the second sub-bracket 11 outputs the angle information to the sample 16 to be tested and controls the sample 16 to be tested to rotate according to the corresponding angle relation, and the effect of accurately controlling the incident signal acquisition angle and the reflected signal acquisition angle of the sample 16 to be tested is achieved; the first hydrophone is installed on the fixing rod mechanism, and the second hydrophone is installed on the third sub-support 12 respectively, so that the problem that multi-angle echo reduction and multi-angle insertion loss synchronous measurement are difficult to achieve in practice is solved, and the effects of improving the measurement efficiency and improving the accuracy of measurement results are achieved.

In this embodiment, the overall holder includes: the support base 1 is used for supporting and playing a role of the whole mechanical rotating device; the first cross beam plate 2 is fixed on the bracket base 1; one end of the first vertical beam plate 3 is fixed at two ends of the upper surface of the first transverse beam plate 2; one end of the second vertical beam plate 4 is fixed in the middle of the upper surface of the first transverse beam plate 2; the second cross beam plate 5 is supported and fixed at the other ends of the first vertical beam plate 3 and the second vertical beam plate 4; the first vertical beam plate 3 and the second vertical beam plate 4 are used for supporting and separating the first cross beam plate 2 and the second cross beam plate 5, and the first cross beam plate 2 and the second cross beam plate 5 are used for fixing and supporting a transmission mechanism, a first sub-bracket 10, a second sub-bracket 11 and a third sub-bracket 12; one end of the third vertical beam plate 6 is fixed on the second cross beam plate 5; the third cross beam plate 7 is supported and fixed at the other end of the third vertical beam plate 6; wherein the third vertical beam plate 6 is used for supporting and separating the second cross beam plate 5 and the third cross beam plate 7, and the third cross beam plate 7 is used for supporting the first speed reducer 37 and the second speed reducer 42; the first lifting ring nut 8 is fixed with the left end of the second cross beam plate 5 through threads; the second lifting ring nut 9 is fixed with the right end of the second cross beam plate 5 through threads; wherein, the first lifting ring nut 8 and the second lifting ring nut 9 are used for realizing the hoisting and the placement of the whole mechanical rotation device.

In this embodiment, the first slewing bearing mechanism includes: a first bearing seat 17, said first bearing seat 17 being fixed to said second beam plate 5; a first thrust ball bearing 18, said first thrust ball bearing 18 being mounted on said first bearing seat 17; a second bearing block 19, said first bearing block 17 being fixed to said first beam plate 2; a second thrust ball bearing 20, said second thrust ball bearing 20 being mounted on said second bearing block 19; the first rotary bearing rod 21 is sleeved and supported on the first thrust ball bearing 18 and the second thrust ball bearing 20; the first thrust ball bearing 18 and the second thrust ball bearing 20 facilitate the free rotation of the first rotation bearing rod 21, and simultaneously ensure that the first rotation bearing rod 21 is axially kept fixed to realize the bearing function.

In this embodiment, the second slewing bearing mechanism includes: a third bearing housing 22, said third bearing housing 22 being fixed to said second beam plate 5; a third thrust ball bearing 23, wherein the third thrust ball bearing 23 is mounted on the third bearing seat 22; a fourth bearing seat 24, wherein the fourth bearing seat 24 is fixed on the first cross beam plate 2; a fourth thrust ball bearing 25, wherein the fourth thrust ball bearing 25 is mounted on the fourth bearing seat 24; the second rotary bearing rod 26 is sleeved and supported on the third thrust ball bearing 23 and the fourth thrust ball bearing 25, and the second rotary bearing rod 26 is sleeved and supported on the fourth thrust ball bearing 25; the third thrust ball bearing 23 and the fourth thrust ball bearing 25 are beneficial to achieving free rotation of the second rotary bearing rod 26, meanwhile, the second rotary bearing rod 26 is guaranteed to be axially kept fixed to achieve a bearing function, the diameter of the second rotary bearing rod 26 is twice that of the first rotary bearing rod 21, and therefore the requirement for strength of the second rotary bearing rod 26 when the to-be-tested sample 16 with large hoisting quality is installed is met.

In this embodiment, the third slewing bearing mechanism includes: a fifth bearing seat 27, wherein the fifth bearing seat 27 is fixed on the second beam plate 5; a fifth thrust ball bearing 28, wherein the fifth thrust ball bearing 28 is mounted on the fifth bearing seat 27; a sixth bearing seat 29, wherein the sixth bearing seat 29 is fixed on the first beam plate 2; a sixth thrust ball bearing 30, wherein the sixth thrust ball bearing 30 is mounted on the sixth bearing seat 29; the third rotary bearing rod 31, the third rotary bearing rod 31 is sleeved and supported on the fifth thrust ball bearing 28 and the sixth thrust ball bearing 30; the fifth thrust ball bearing 28 and the sixth thrust ball bearing 30 facilitate the third rotation bearing rod 31 to rotate freely, and simultaneously ensure that the third rotation bearing rod 31 is axially fixed to realize the bearing function.

In this embodiment, the rotation transmission mechanism includes: a seventh bearing seat 32, wherein the seventh bearing seat 32 is fixed on the second cross beam plate 5; a seventh thrust ball bearing 33, the seventh thrust ball bearing 33 being mounted on the seventh bearing seat 32; an eighth bearing seat 34, wherein the eighth bearing seat 34 is fixed on the first cross beam plate 2; an eighth thrust ball bearing 35, the eighth thrust ball bearing 35 being mounted on the eighth bearing seat 34; the rotary transmission rod 36 is sleeved and supported on the seventh thrust ball bearing 33 and the eighth thrust ball bearing 35; the seventh thrust ball bearing 33 and the eighth thrust ball bearing 35 facilitate the free rotation of the slewing transmission rod 36, and simultaneously ensure that the slewing transmission rod 36 is kept fixed in the axial direction to meet the transmission function.

In this embodiment, the transmission mechanism includes: the first speed reducer 37, the first speed reducer 37 is fixed on the main bracket, and the output end of the first speed reducer 37 is coupled with the input end of the rotary transmission mechanism; a first rocking hand wheel 38, wherein the first rocking hand wheel 38 is matched with the input end of the first speed reducer 37 and controls the output quantity of the first speed reducer 37; the first rocking hand wheel 38 is rotated to control the first speed reducer 37 to output a rotation amount corresponding to an angle, the first speed reducer 37 is used for controlling the output rotation amount, an effective mechanical rotation angle can be obtained under the condition of a small input force, meanwhile, the first speed reducer 37 is directly coupled with the slewing transmission rod 36, the output amount of the first speed reducer 37 is used as the input amount of the slewing transmission rod 36, and transmission of a fixed rotation angle is further realized; the first straight-tooth cylindrical gear 40 is sleeved on the first rotary bearing rod 21 and connected with the output end of the first rotary bearing mechanism; the second straight-toothed spur gear 39 is sleeved at the output end of the rotary transmission mechanism, the first straight-toothed spur gear 40 is meshed with the second straight-toothed spur gear 39, and the number of teeth of the first straight-toothed spur gear 40 is the same as that of the second straight-toothed spur gear 39; a third spur gear 41, wherein the third spur gear 41 is sleeved at an output end of the second rotary load-bearing mechanism, the third spur gear 41 is meshed with the second spur gear 39, and the number of teeth of the third spur gear 41 is twice that of the second spur gear 39; the rotation transmission rod 36 is controlled and rotates in a corresponding angle through the first speed reducer 37, the first spur gear 40 and the second spur gear 39 have equal angular speeds and opposite angular speeds, the third spur gear 41 and the second spur gear 39 have opposite angular speeds, and the angular speed of the second spur gear 39 is twice that of the third spur gear 41, so that the transmission mechanism can realize that the first spur gear 40 and the third spur gear 41 have the same angular speed and the angular speed of the first spur gear 40 is twice that of the third spur gear 41, thereby realizing the rotation angle control with a fixed angular relationship; the second speed reducer 42 is fixed on the main support, and the output end of the second speed reducer 42 is coupled with the input end and the output end of the third rotary bearing mechanism; a second rocking hand wheel 43, wherein the second rocking hand wheel 43 is matched with the input end of the second speed reducer 42 and controls the output quantity of the second speed reducer 42; the second rocking hand wheel 43 is rotated to control the second speed reducer 42 to output a rotation amount corresponding to the angle, the second speed reducer 42 is used for controlling the output rotation amount, an effective mechanical rotation angle can be obtained under the condition of a small input force, meanwhile, the second speed reducer 42 is directly coupled with the inlet end and the outlet end of the third rotary bearing mechanism, the output amount of the second speed reducer 42 is used as the input amount of the third rotary bearing mechanism, and transmission of a fixed rotation angle is further achieved.

In this embodiment, the slide lever mechanism includes: a bevel assembly 14, said bevel assembly 14 being fixed to said first sub-mount 10; a flat angle component 44, wherein the flat angle component 44 is fixed on the first sub-bracket 10; a cylindrical sliding rod 15, wherein the cylindrical sliding rod 15 is sleeved and fixed on the bevel angle component 14 and the straight angle component 44; the linear bearing 45 is sleeved on the cylindrical sliding rod 15, and the linear bearing 45 is sleeved on the cylindrical sliding rod 15; one end of the fixed rod mechanism is sleeved and fixed on the linear bearing 45; wherein, the oblique angle component 14 and the flat angle component 44 can realize the rigid relation between the cylindrical sliding rod 15 and the first sub-bracket 10, thereby realizing the synchronous rotation movement of the cylindrical sliding rod 15 and the first sub-bracket 10, and the linear bearing 45 can ensure the axial movement of the fixed rod mechanism and simultaneously ensure no radial movement of the fixed rod mechanism, thereby realizing the stability of the fixed rod mechanism.

In this embodiment, the free-wheeling linkage mechanism includes: a first connecting flange 47, the bottom of the first connecting flange 47 being fixed to the lower end of the second sub-bracket 11; a longitudinal free rotation shaft 48, the upper end of the longitudinal free rotation shaft 48 being fixed to the top of the first connecting flange 47; a second connecting flange 49, the top of the second connecting flange 49 is fixed on the bottom of the longitudinal free rotation shaft 48; a first rolling bearing 50, wherein the first rolling bearing 50 is sleeved and supported at the upper part of the longitudinal free rotating shaft 48; a second rolling bearing 51, wherein the second rolling bearing 51 is sleeved and supported on the upper part of the longitudinal free rotating shaft 48; a freely rotating outer ring 52, wherein the freely rotating outer ring 52 is sleeved and fixed on the outer edges of the first rolling bearing 50 and the second rolling bearing 51; a lateral free rotation shaft 53, one end of the lateral free rotation shaft 53 being fixed to the outer surface of the free rotation outer ring 52; the third rolling bearing 54 is sleeved on the fixing rod mechanism; the freely rotating outer ring 52 plays a role in protecting the first rolling bearing 50 and the second rolling bearing 51, the first rolling bearing 50 and the second rolling bearing 51 can guarantee that no axial movement exists while the freely rotating outer ring 52 and the transverse freely rotating shaft 53 are guaranteed to rotate freely, and the third rolling bearing 54 can guarantee that no axial movement exists while the fixed rod mechanism freely rotates, so that the stability of the freely rotating linkage shaft mechanism is realized.

The embodiment of the invention also provides a control method of the mechanical slewing device for multi-angle echo reduction measurement, when the device is used, the sample 16 to be measured is installed on the second sub-bracket 11, meanwhile, the hydrophone is installed on the third sub-bracket 12, the rotation angle of the third sub-bracket 12 is controlled through the second speed reducer 42, the hydrophone can freely rotate at the position of the back side of the sample, and further the multi-angle insertion loss measurement of the sample 16 to be measured is synchronously realized.

The method may comprise the steps of:

(1) mounting a mechanical slewing device in a manner shown in fig. 1 to 5, fixing the incident angle direction of a sound source, mounting a sample 16 to be tested on the second sub-bracket 11, and simultaneously mounting a first hydrophone on the fixing rod mechanism to ensure that the sound source, the sample 16 to be tested and the first hydrophone are sequentially placed;

(2) determining the incident angle direction of 0 degree and the position relation between the sample 16 to be tested of the hydrophone and the hydrophone I, as shown in figure 1;

(3) presetting an incident angle of a sample 16 to be measured, inputting incident angle information into the first speed reducer 37 through the first rocking hand wheel 38, outputting the angle information to the rotary transmission mechanism through the first speed reducer 37, outputting the angle information to the second spur gear 39 through the rotary transmission mechanism, and outputting the angle information to the first spur gear 40 and the third spur gear 41 through the second spur gear 39 through a meshing relationship;

(4) the first spur gear 40 and the third spur gear 41 respectively output the angle information and the matching relationship to the first rotary bearing mechanism and the second rotary bearing mechanism, the first rotary bearing mechanism and the second rotary bearing mechanism respectively drive the first sub-bracket 10 and the second sub-bracket 11 to rotate in a corresponding angle and angle relationship, finally the first sub-bracket 10 outputs the angle information to the fixed rod mechanism and controls the first hydrophone to rotate in a preset angle, and the second sub-bracket 11 outputs the angle information to the sample 16 to be tested and controls the sample 16 to be tested to rotate in a corresponding angle relationship;

(5) according to the tooth number relation of the first straight-toothed spur gear 40, the second straight-toothed spur gear 39 and the third straight-toothed spur gear 41, the rotation angular velocity of the first hydrophone is twice of the rotation angular velocity of the sample 16 to be measured, so that the collection of reflected wave signals of the sample 16 to be measured under the condition of meeting the reflection law can be realized, and the measurement result of multi-angle echo reduction is calculated;

(6) meanwhile, a second hydrophone is arranged on the third sub-bracket 12 for acquiring the transmission signal, the acquisition angle of the transmission signal is preset, this incident angle information is input to the second speed reducer 42 via the second rocking hand wheel 43, the second speed reducer 42 outputs the angle information to the third rotary bearing mechanism, the third rotary bearing mechanism drives the third sub-bracket 12 to rotate by a corresponding angle, finally the third sub-bracket 12 outputs the angle information to the second hydrophone and controls the second hydrophone to rotate by a preset angle, so that the transmission signals of the sample 16 to be measured at different angle positions can be measured and obtained under the condition of a fixed incident angle, and further, the multi-angle insertion loss measurement result of the sample 16 to be measured can be obtained by synchronous measurement and calculation while the multi-angle echo reduction measurement result is obtained.

(7) And lifting the position of the second straight-toothed spur gear 39, so that the second straight-toothed spur gear 39 is disengaged from the first straight-toothed spur gear 40 and the third straight-toothed spur gear 41, fixing the angular position of the sample 16 to be measured under the condition that the direction of the incident signal is constant, performing transformation on the angular position of the first hydrophone, and further measuring and collecting scattered wave signals of the sample 16 to be measured at different angular positions under the condition that the incident angle is fixed.

According to the embodiment, the rotation angle is controlled by shaking the hand wheel and the speed reducer control device, so that the problem of excessive labor consumption in the process of manually adjusting the rotation angle is solved, and the effect of saving labor is further achieved; the linkage control of the rotation relation among all the parts is carried out through the transmission mechanism, so that the control and realization of the incident angle and the reflection angle which meet the Snell reflection law are realized, the problem of angle position errors generated in the process of independently adjusting the relative positions of all the parts is solved, and the effect of accurately controlling the signal incident angle and the signal reflection angle is further achieved; by adjusting the meshing relation of gears in the transmission mechanism and matching the output of the shaking hand wheel and the speed reducer, the problem that different signal acquisition angle positions are difficult to be controlled independently and accurately under the direction of a fixed sound source incidence angle is solved, and the effect of acquiring signals at different reflection (scattering) angles under the direction of the fixed sound source incidence angle is achieved; the hydrophone is respectively arranged on the fixing rod mechanism and the third sub-bracket 12 of the mechanical rotating device, so that the problem that multi-angle echo reduction and multi-angle insertion loss synchronous measurement are difficult to realize in practice is solved, and the effects of improving the measurement efficiency and improving the accuracy of the measurement result are achieved. Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.