CN204536550U - The test unit that a kind of fish acoustic target strength measures - Google Patents
The test unit that a kind of fish acoustic target strength measures Download PDFInfo
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- CN204536550U CN204536550U CN201520168514.8U CN201520168514U CN204536550U CN 204536550 U CN204536550 U CN 204536550U CN 201520168514 U CN201520168514 U CN 201520168514U CN 204536550 U CN204536550 U CN 204536550U
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Abstract
The utility model relates to the test unit that fish acoustic target strength measures, comprise tank, transducer, fixed head, connecting line, pendle, guiding parts, accommodating basket, first longitudinal rod, second longitudinal rod, transverse bar, draught line and several nautical receiving set, fixed head is provided with pillar, crossbeam established by pillar, crossbeam has angle scale and has the rule of rider, crossbeam one end is provided with setting nut, connecting line walks around guiding parts, connecting line one end directly or is indirectly connected with crossbeam, the connecting line other end connects pendle, transducer, accommodating basket and nautical receiving set are all in same level, crossbeam has adjustment member, fixed head and transverse bar are all relatively provided with through-hole groove, winding structure is established at least one end of transverse bar, draught line one end connects winding structure, the draught line other end is connected and fixed plate.This device had both met the needs of the different caliber size of tank, the degree of depth, determine again test fish body be in different angles under acoustic target strength.
Description
Technical field
The utility model relates to fish acoustic target strength fields of measurement, particularly relates to the test unit that a kind of fish acoustic target strength measures.
Background technology
Along with the effect of ocean resources in the national economic development highlights day by day, China also deepens marine resources development dynamics thereupon.As the important component part in ocean resources, assessment and the monitoring of fishery resources are particularly important.The acoustic target strength of fish is the important parameters carrying out fisheries stock assessment and monitoring.
The acoustic target strength of fish refers to, when sound wave carries out radiation to fish, at distance outside one meter of of fish acoustic central spot, and the ratio of reflective sound wave intensity and incident acoustic wave intensity.Under normal circumstances, the acoustic target strength decibel of fish is described, and amplifies ten times after carrying out logarithm operation process by ratio again.Utilize the acoustic target strength of fish can infer information such as the density of the shoal of fish, quantity.
Chinese invention patent application CN200910249057.4 discloses a kind of fish acoustic target strength measurement device, there is tank, arc guide rail is provided with in the inner side of tank, coaster is furnished with mutually with arc guide rail, coaster is equipped with inclinator and transducer, the upper horizontal of tank is provided with index dial, in the central hole of scale scale, lower end is housed and connects the rotating shaft horizontally rotating bar, horizontally rotate the below connecting connector of bar, the surface of emission of transducer points to the circle centre position of arc guide rail.During measurement, test fish is suspended on the below of horizontal rotary bull stick, makes test fish be positioned at the circle centre position of arc guide rail.By the position of transducer on adjustment coaster, change the angle of incident acoustic wave, thus measure the acoustic target strength value of fish body under different incident directions.But device disclosed in Chinese invention patent application CN200910249057.4 can not measure the acoustic target strength value that fish body is under differing tilt angles, can not meet the actual needs of measurement.
In order to the actual needs of satisfied measurement, Chinese utility model patent CN201420017982.0 discloses a kind of experimental provision measuring fish acoustic target strength, include transducer, pillar, fixed head, connecting line, pendle and guiding parts, pillar is located on fixed head, connecting line walks around guiding parts, pillar is provided with the crossbeam that can swing, crossbeam is provided with rule and angle scale, the side of crossbeam is provided with setting nut, rule is provided with rider, transducer is positioned at tank and is located at immediately below crossbeam, one end of connecting line directly or is indirectly connected with crossbeam, the other end of connecting line is connected with pendle.Pass through adjusting nut, fish body is made to pull at connecting line the certain angle that has a down dip, cause the inclination of crossbeam, and then read these inclination number of degrees now according to the pointer instruction on angle scale, complete and the acoustic target strength value of fish body under differing tilt angles is measured.
But, Chinese utility model patent CN201420017982.0 still comes with some shortcomings part: on the one hand, on reading angular dish during the instruction number of degrees of pointer, to remain between crossbeam and angle scale and be in swing state, it is not accurate enough for now carrying out reading according to the number of degrees of pointer instruction, have impact on the acoustic target strength value measuring fish body; On the other hand, when carrying out test determination in the tank of different caliber size, different water depth, in Chinese utility model patent CN201420017982.0 provide the fixed head size of experimental provision to do to adjust neatly, be difficult to the actual needs meeting various caliber size, the different tank of water depth.
Utility model content
Technical problem to be solved in the utility model provides a kind of acoustic target strength value that accurately can either read fish body under differing tilt angles for above-mentioned prior art, can meet again there is different caliber size, test unit that the fish acoustic target strength of tank actual needs of different water depth measures.
The technical scheme in the invention for solving the above technical problem is: the test unit that a kind of fish acoustic target strength measures, comprise tank, test target is launched and receives the transducer of sound wave, fixed head, connecting line, pendle, accommodating basket and provide the guiding parts of guiding for connecting line, fixed head is provided with pillar, pillar is provided with the crossbeam that can swing, crossbeam has angle scale and there is the rule of rider, one end of crossbeam is provided with setting nut, connecting line walks around guiding parts, one end of connecting line directly or is indirectly connected with crossbeam, the other end of connecting line is connected with pendle, it is characterized in that, also comprise the first longitudinal rod, second longitudinal rod, transverse bar, draught line and several nautical receiving set, described transducer, accommodating basket and nautical receiving set are all in same level, crossbeam has the adjustment member of fixed cross beam and angle scale, fixed head and transverse bar are all relatively provided with for the first longitudinal rod, second longitudinal rod regulates the through-hole groove of movement, at least one end of transverse bar is provided with winding structure, one end of draught line connects winding structure, the other end of draught line is connected with fixed head, enter an accommodating step ground basket, point not state and prolong the long envelope curve of structure and draw together two and shake the hand moved side and connect handle and connect with line and Lian Yujie with tying around a terminal.The traction fixed pulley that draught line one end connects, traction is connected with swinging handle with fixed pulley, and described draught line is connected to the two ends place of fixed head symmetrically.
Further, described accommodating basket has the hold assembly of opening and clamping test target initial and tail sections respectively, and accommodating basket is connected with the connecting line of pillar extended line both sides respectively.
Further, described test unit also comprises the video camera detected test target state, and the inwall of described tank is provided with noise elimination structure.
Further, described rider is connected with hanging object, and hanging object is positioned at immediately below rider, and connecting line is provided with bobbin winoler, and bobbin winoler is positioned at the junction of crossbeam and connecting line.
Further, described guiding parts is guiding fixed pulley or arc-shaped guide rail, and described adjustment member is screw.
Further, described guiding fixed pulley lays respectively at the downside of fixed head and the bottom of tank, and the described guiding fixed pulley equally spaced both sides being located at pillar extended line respectively.
Further, described draught line is the line that carbon fibre material is made.
Compared with prior art, the utility model has the advantage of: before the acoustic target strength of fish body measures in different caliber size, different depth tank, the first longitudinal rod and the second longitudinal rod is moved by left and right adjusting in through-hole groove, test unit is made to meet the caliber size needs of tank, then by adjustment winding structure, the fixed head of bearing test device is moved up and down, to meet the different depth needs in tank at the first longitudinal rod and the second longitudinal rod; When measuring the acoustic target strength of fish body, after making crossbeam be in equilibrium state by mobile setting nut, move rider on the scale to control the angle of inclination of test fish fish body, and by adjustment adjustment member, fixed angles scale and crossbeam, make no longer to produce swing between angle scale and crossbeam, finally read the number of degrees of instruction according to the pointer on angle scale, thus complete the acoustic target strength to fish body under differing tilt angles.This experimental provision can not only progressively, the angle of inclination of trickle adjustment test fish body, measuring process is convenient, easy to control, and meet the actual needs of different caliber size, different depth tank, and prevent and read the impact brought to the number of degrees because swinging between angle scale and crossbeam, further increase the accuracy of measurement result.
Accompanying drawing explanation
Fig. 1 is the test unit structural representation that the utility model embodiment Mesichthyes acoustic target strength measures;
Plan structure schematic diagram when Fig. 2 is the first longitudinal rod in test unit shown in Fig. 1, the second longitudinal rod is arranged in transverse bar through-hole groove;
Plan structure schematic diagram when Fig. 3 is the first longitudinal rod in test unit shown in Fig. 1, the second longitudinal rod is arranged in fixed head through-hole groove;
Fig. 4 is the structural representation of the accommodating basket of fixing test fish fish body in test unit shown in Fig. 1;
Fig. 5 be nautical receiving set and be fixed with test fish accommodating basket between the vertical view of position relationship;
Fig. 6 is relation schematic diagram between the utility model embodiment pointer instruction number of degrees and test fish body angle of inclination.
Embodiment
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
As shown in Figure 1 to 4, the test unit that the present embodiment Mesichthyes acoustic target strength measures, comprise tank 23, test target 19 is launched and receives the transducer 1 of sound wave, fixed head 2, connecting line 3, pendle 4, accommodating basket 20 and guiding parts 5, guiding parts 5 provides guide effect for the trend of connecting line 3, fixed head 2 is provided with pillar 6, pillar 6 is provided with the crossbeam 7 that can swing, crossbeam 7 have angle scale 8 and rule 10, rule 10 has rider 9, setting nut 11 is provided with in one end of crossbeam 7, connecting line 3 walks around guiding parts 5, and one end of connecting line 3 directly or is indirectly connected with crossbeam 7, and the other end of connecting line 3 is connected with pendle 4, as improvements, this test unit also comprises the first longitudinal rod 12, second longitudinal rod 13, transverse bar 14, draught line 15 and several nautical receiving set 26, transducer 1, accommodating basket 20 and nautical receiving set 26 are all in same level, crossbeam 7 has adjustment member 16, the effect of adjustment member 16 is used to be fixed crossbeam 7 and angle scale 8, in addition, fixed head 2 and transverse bar 14 are all relatively provided with through-hole groove 17, through-hole groove 17 is used for carrying out left and right for the first longitudinal rod 12, second longitudinal rod 13, up-down adjustment moves, at least one end of transverse bar 14 is provided with winding structure 18, one end of draught line 15 connects winding structure 18, the other end of draught line 15 is connected with fixed head 2, and accommodating basket 20 is connected with the connecting line 3 of pillar 6 extended line both sides respectively.As preferably, the adjustment member 16 in the present embodiment adopts screw, thus can screw, fixes crossbeam 7 and angle scale 8, after tilting, causes producing between crossbeam 7 and angle scale 8 swinging, affects pointer 81 on angle scale 8 and accurately indicate the number of degrees to prevent crossbeam 7.Wherein, the number of nautical receiving set 26 is arranged as required, and the number of nautical receiving set 26 is more, and the angle residing for test fish fish body of mensuration is more, then, under the different angles finally measure, obtained, the acoustic target strength Value Data storehouse of test fish fish body is larger.By arranging multiple nautical receiving set 26, utilize a transducer 1 to carry out acoustic emission when achieving acoustic target strength, multiple nautical receiving set 26 carries out the object received.
Transducer 1 is for test target 19, and the test fish fish body namely in the present embodiment launches acoustic signals;
Guiding parts 5, being responsible for the stable of crossbeam 7 provides equilibrant on the one hand, on the other hand for accommodating basket 20 lateral extent of fixing test fish fish body provides lateral pull.Selectively, guiding parts 5 is guiding fixed pulley or arc-shaped guide rail;
Pillar 6 is used for the parts such as supporting traverse 7 and angle scale 8, simultaneously for the swing of crossbeam 7 provides a fulcrum;
Fixed head 2, with thinking that test unit provides a support platform;
Connecting line 3, for direct or indirect connecting cross beam 7 and pendle 4, the object arranging connecting line 3 and pendle 4 is then swing for the ease of adjusting crossbeam 7 and balance;
Rule 10, provides one with reference to yardstick when being mainly trickle adjustment rider 9, thus realizes the accurate adjustment of test fish fish body under differing tilt angles;
The function of angle scale 8 is, when making crossbeam 7 occur to swing by adjustment rider 9 and to cause the angle of inclination of test fish fish body to change, the angle that pointer 81 on angle scale 8 indicates crossbeam 7 to swing, and the angle that now pointer 81 indicates is the angle of inclination of test fish fish body.As shown in Figure 6, below in crossbeam 7 swing process, the relation between the tilt angle theta of the angle [alpha] that pointer 81 indicates and test fish fish body is explained:
Crossbeam 7 shape γ in an angle between meeting and horizontal line in swing process, shape α in an angle between zero degree groove on pointer 81 and angle scale 8, and test fish fish body tilt after and the angle that formed between horizontal line be θ.Because alpha+beta=90 °, γ+β=90 °, known, α=γ.From the character of parallel lines, γ=θ.So, α=θ.Namely the angle [alpha] that pointer 81 indicates equals the tilt angle theta of testing fish fish body.
Setting nut 11, for returning to zero to the original state of crossbeam 7.Mobile setting nut 11, make the central scale mark of pointer 81 alignment angle scale 8 or about the central scale mark of angle scale 8, make constant amplitude to swing, state representation crossbeam 7 now is in balance: if pointer 81 is to the left, then by setting nut 11 dextrorotation; If pointer 81 is to the right, then by left-handed for setting nut 11.
In addition, through-hole groove 17 on transverse bar 14 and fixed head 2, need to carry out corresponding just to setting, during to guarantee that the first longitudinal rod 12, second longitudinal rod 13 is positioned in through-hole groove 17, first longitudinal rod 12, second longitudinal rod 13 all both can move left and right in through-hole groove 17, to adapt to the tank needs of different caliber size, can move up and down by vertical direction in through-hole groove 17 again, to adapt to the actual needs of different depth tank.
In order to can according to the actual needs of the tank degree of depth, the position of Adjustment Tests device on tank accurately, the traction fixed pulley that winding structure 18 comprises swinging handle and is connected with draught line 15 one end, traction be connected with swinging handle with fixed pulley.Like this, when needing the level height raising or reduce residing for test unit, only need to rotate swinging handle according to a certain direction, and then utilize traction fixed pulley to be connected to draught line 15 pull-up of fixed head 2 or to transfer, thus have adjusted the level height residing for test unit.
For in process of the test in the past, test fish fish body is easily connected line 3 stretching and causes disconnected problem, test unit in the present embodiment includes the accommodating basket 20 of fixing test fish, accommodating basket 20 adopts plastic material to make, accommodating basket 20 has the hold assembly 202 of perforate 201 and clamping test fish initial and tail sections respectively, accommodating basket 20 is connected with the connecting line 3 of pillar 6 extended line both sides respectively.Test fish is fixed in accommodating basket 20, can not have an impact during the accommodating basket 20 of connecting line 3 uniaxial direct tensile to test fish fish body; The effect of perforate 201 is, is exposed by the test fish fish body be fixed on accommodating basket 20, thus realizes transducer 1 directly to test fish fish body transmitting acoustic signals.
Be in acoustic target strength under different angles to measure test fish fish body, as improvements, the test unit in the present embodiment also comprises the video camera 24 detected test target 19 state, the inwall of tank 23 is provided with noise elimination structure 25.
When utilizing test unit to test test fish, the weight of test fish is often not identical.In order to realize measuring the test fish of Different Weight, as preferably, rider 9 is connected with hanging object 21, and hanging object 21 is positioned at immediately below rider 9.
Further, in order to measure the acoustic target strength of test fish in different water depth situation, connecting line 3 is provided with bobbin winoler 22, and bobbin winoler 22 is positioned at the junction of crossbeam 7 and connecting line 3.So just, bobbin winoler 22 can be utilized to adjust the vertically sagging length of connecting line 3, thus test under test fish fish body is placed in the different degree of depth.Wherein, connecting line 3 can be chosen as the soft material such as lifting rope, fine rule line body.
In order to realize the balance of testing accommodating basket 20 residing for fish, fixed pulley 14 is located at the downside of fixed head 2 and the bottom of tank respectively.Under the effect of the pendle 4 of pillar 6 extended line both sides, connecting line 3 can provide the balanced pulling force of a transverse direction for accommodating basket 20, thus make the initial state of accommodating basket 20 be in tilt angle of zero, and then stable adjustment is carried out at the angle of inclination be conducive to accommodating basket 20 being tested fish fish body.
Further, in order to improve the accuracy at read test fish fish body angle of inclination, guiding parts 5 is the equally spaced both sides being located at pillar 6 extended line respectively.Such as, guiding parts 5 one aspect is equally spaced to be arranged on fixed head 2 and to be positioned at the both sides of pillar 6 extended line, on the one hand equally spaced be arranged on tank 23 bottom and be positioned at the both sides of pillar 6 extended line equally.Such setting not only can provide stable lateral pull for the accommodating basket 20 that stretches, simultaneously under the effect of the pendle 4 of pillar 6 extended line both sides, connecting line 3 can provide equilibrant for crossbeam 7, thus facilitates the mobile rider 9 regulated on rule 10 of precision.
In order to ensure that draught line 15 is in pull-up fixed head 2 process further, can not because producing fracture by downward pulling force, as preferably, draught line 15 is herein made up of carbon fibre material.
Below in conjunction with Fig. 1 ~ Fig. 6, the mensuration process utilizing test unit in the utility model embodiment to measure fish acoustic target strength is described:
(1) according to caliber size, the degree of depth needs of tank 23, left and right adjusts the first position of longitudinal rod 12, second longitudinal rod 13 in transverse bar 14, fixed head 2, to meet tank caliber size needs; Rotate winding structure 18, the level height of platform residing for Adjustment Tests device, to adapt to the needs of the different tank degree of depth;
(2) the head and the tail two ends of test fish are clamped respectively, are fixed in accommodating basket 20, and expose the fish body of test fish at perforate 201 place;
(3) according to the test needs of test, adjustment bobbin winoler 22, makes the accommodating basket 20 of fixing test fish be in the appropriate depth of water in tank 23;
(4) mobile setting nut 11, make the central scale mark of pointer 81 alignment angle scale 8 or about the central scale mark of angle scale 8, make constant amplitude to swing, and the test fish fish body maintenance level that perforate 201 place is exposed and be positioned at the dead ahead of the horizontal direction of transducer 1;
(5) transducer 1, video camera 24 and nautical receiving set 26 is opened, transducer 1 is made to launch sound wave to test fish fish body, the state that each nautical receiving set 26 receives sound wave that test fish fish body reflects, video camera 24 detects test fish fish body, and the reflective sound wave intensity recording that now transmitting sound wave intensity, each nautical receiving set 26 receive;
(6) mobile rider 9 on rule 10, makes the fish body accommodating basket 20 being tested fish to tilt different angles, and records the angular values on index dial 8 indicated by pointer 81 respectively;
(7) the fish body angle of inclination of fish is tested accordingly with step (6), the intensity of acoustic wave that the test fish of recording nautical receiving set 26 reception is respectively reflected back;
(8) intensity of acoustic wave that the intensity of acoustic wave launched under test fish fish body is in differing tilt angles for transducer 1 and nautical receiving set 26 receive processes respectively, obtains the acoustic target strength of test fish fish body under differing tilt angles;
(9) the test fish fish body state value detected according to video camera 24, the transmitting intensity of acoustic wave value of transducer 1 and be in the reflective sound wave intensity level that diverse location nautical receiving set 26 receives, calculate the acoustic target strength that test fish fish body is corresponding, the acoustic target strength now obtained is acoustic target strength value during test fish fish body different rotation angle.
Claims (8)
1. the test unit of a fish acoustic target strength mensuration, comprise tank (23), test target (19) is launched to the transducer (1) of sound wave, fixed head (2), connecting line (3), pendle (4), accommodating basket (20) and provide the guiding parts (5) of guiding for connecting line (3), fixed head (2) is provided with pillar (6), pillar (6) is provided with the crossbeam (7) that can swing, crossbeam (7) has angle scale (8) and there is the rule (10) of rider (9), one end of crossbeam (7) is provided with setting nut (11), connecting line (3) walks around guiding parts (5), one end of connecting line (3) directly or is indirectly connected with crossbeam (7), the other end of connecting line (3) is connected with pendle (4), it is characterized in that, also comprise the first longitudinal rod (12), second longitudinal rod (13), transverse bar (14), draught line (15) and several nautical receiving set (26), described transducer (1), accommodating basket (20) and nautical receiving set (26) are all in same level, crossbeam (7) has the adjustment member (16) of fixed cross beam (7) and angle scale (8), fixed head (2) and transverse bar (14) are all relatively provided with for the first longitudinal rod (12), second longitudinal rod (13) regulates the through-hole groove (17) of movement, at least one end of transverse bar (14) is provided with winding structure (18), one end of draught line (15) connects winding structure (18), the other end of draught line (15) is connected with fixed head (2), accommodating basket (20) is connected with the connecting line (3) of pillar (6) extended line both sides respectively.
2. the test unit of fish acoustic target strength mensuration according to claim 1, it is characterized in that, the traction fixed pulley that described winding structure (18) comprises swinging handle and is connected with draught line (15) one end, traction is connected with swinging handle with fixed pulley.
3. the test unit of fish acoustic target strength mensuration according to claim 1 and 2, it is characterized in that, described accommodating basket (20) has the hold assembly (202) of opening (201) and difference clamping test target (19) initial and tail sections.
4. the test unit of fish acoustic target strength mensuration according to claim 3, it is characterized in that, also comprise the video camera (24) test target (19) being carried out to state-detection, the inwall of described tank (23) is provided with noise elimination structure (25).
5. the test unit of fish acoustic target strength mensuration according to claim 1, it is characterized in that, described rider (9) is connected with hanging object (21), hanging object (21) is positioned at immediately below rider (9), connecting line (3) is provided with bobbin winoler (22), and bobbin winoler (22) is positioned at the junction of crossbeam (7) and connecting line (3).
6. the test unit that the fish acoustic target strength according to claim 1 or 2 or 5 measures, it is characterized in that, described guiding parts (5) is guiding fixed pulley or arc-shaped guide rail, and described adjustment member (16) is screw.
7. the test unit of fish acoustic target strength mensuration according to claim 6, it is characterized in that, described guiding fixed pulley lays respectively at the downside of fixed head (2) and the bottom of tank (23), and the described guiding fixed pulley equally spaced both sides being located at pillar (6) extended line respectively.
8. the test unit that the fish acoustic target strength according to claim 1 or 2 or 5 measures, is characterized in that, the line that described draught line (15) is made for carbon fibre material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520168514.8U CN204536550U (en) | 2015-03-25 | 2015-03-25 | The test unit that a kind of fish acoustic target strength measures |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520168514.8U CN204536550U (en) | 2015-03-25 | 2015-03-25 | The test unit that a kind of fish acoustic target strength measures |
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| CN204536550U true CN204536550U (en) | 2015-08-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607868A (en) * | 2017-09-08 | 2018-01-19 | Tcl瑞智（惠州）制冷设备有限公司 | A kind of compressor stator wire length experimental apparatus for testing and method |
-
2015
- 2015-03-25 CN CN201520168514.8U patent/CN204536550U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607868A (en) * | 2017-09-08 | 2018-01-19 | Tcl瑞智（惠州）制冷设备有限公司 | A kind of compressor stator wire length experimental apparatus for testing and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20160325 |
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| CF01 | Termination of patent right due to non-payment of annual fee |