CN102841216B - Portable speed measuring device for ship - Google Patents
Portable speed measuring device for ship Download PDFInfo
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- CN102841216B CN102841216B CN201210364122.XA CN201210364122A CN102841216B CN 102841216 B CN102841216 B CN 102841216B CN 201210364122 A CN201210364122 A CN 201210364122A CN 102841216 B CN102841216 B CN 102841216B
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Abstract
The invention discloses a portable speed measuring device for a ship. The portable speed measuring device comprises a measurement device, an underwater towed body, a towrope, a return pipe and a pressure pipe, wherein the measurement device is hung on a ship board taking speed measurement; the underwater towed body is arranged in water; the measurement device and the underwater towed body are connected through the return pipe and the pressure pipe; and the underwater towed body is connected with the ship taking the speed measurement through the towrope at the same time, so as to lead the underwater towed body to sail synchronously with the ship taking the speed measurement. When the speed measurement is taken, the underwater towed body collects dynamic pressure of fluid moving relative to the ship, and the dynamic pressure passes through an internal loop of the speed measuring device to be converted to static pressure, so that altitude difference between liquid levels at two ends of an inverted U-shaped pipe of the detection device is formed and can be visually displayed on a ruler arranged in the detection device. According to Bernoulli theory, when the altitude difference at the two ends of the inverted U-shaped pipe is h, v=2*(gh)<1/2>, and scale on the rule directly corresponds to the sailing speed for checking the sailing speed. The portable speed measuring device provided by the invention is simple in structure, small in volume, light in weight and convenient for being applied to towing an experimental ship.
Description
Technical field
The present invention relates to a kind of speed measuring device, be specifically related to a kind of portable boat speed measuring device.
Background technology
Underwater towed-body kind equipment is mounted on above water craft conventionally, the parameters such as its drag, towing stability and ship's speed are closely related, these equipment go to toward carrying out on lake or rivers towing trial being delivered for use, utilize test boats and ships under the different speed of a ship or plane, to carry out drag operation, test its performance simultaneously.But some test boats and ships do not have speed of a ship or plane measurement mechanism, need to carry special speed instrument.In the test in past, frequent employing thrown wooden unit, and card stopwatch is measured wooden unit and fallen the time of stern from fore, and then estimates the way of the speed of a ship or plane, and this mode is simple, but precision is too low, should use the larger defect of existence.
At present, the surveying instrument of shipping sail speed mainly contains GPS, electromagnet log, Doppler log etc., these speed measuring equipment precision are very high, for example Doppler log can reach 0.01 joint, but its price is also expensive, and these equipment are used for navigation, a very little part in its function that tests the speed just.In naval vessel, also have and adopt hydraulic type log to test the speed, utilize Pitot tube principle, gather the dynamic pressure of moving naval vessel generation and the difference △ P of static pressure by hydraulic pressure information receiving system, and convert the speed of a ship or plane on naval vessel to and export through a series of mechanisms, by must fall the voyage on naval vessel to the integral operation of the speed of a ship or plane, but current this mode complex structure, volume, weight are large, are not easy to be applied to towing trial ship.
Summary of the invention
In view of this, the invention provides a kind of portable boat speed measuring device, when use, to hang on gun wale moving with shipping for this device, collect the moving fluid of relative shipping by underwater towed-body simultaneously, will gather form that the hydrodynamic that falls converts static pressure to and demonstrate the headway of ship on inverted U pipe through speed measuring device home loop.
Described portable boat speed measuring device, comprises pick-up unit, underwater towed-body, tow rope, recirculatory pipe and pressure guiding pipe.Described pick-up unit comprises: mounting plate, static pressure valve, dynamic pressure valve, water-filling nozzle, water injection valve, inverted U pipe, red ball float, scale, gas injection valve, blue ball float, disappear and move box, drain tap and gas outlet.Described inverted U pipe is vertically fixed on mounting plate, and symmetrical along the vertical center line of mounting plate.The lower end of the left pipeline of inverted U pipe and right pipeline is provided with horizontal interface and vertical interface, and two horizontal interfaces are located along the same line.The horizontal interface of the left pipeline of inverted U pipe is connected with water-filling nozzle by water injection valve.The horizontal interface of the right pipeline of inverted U pipe is connected with gas outlet by drain tap.The top of inverted U pipe arranges gas injection valve.In the left pipeline of inverted U pipe, be placed with red ball float, in right pipeline, be placed with blue ball float.The diameter of described red ball float and blue ball float is identical, is all less than or equal to the caliber of inverted U pipe, ensures that red ball float and blue ball float can fluctuate freely in inverted U pipe.In the left pipeline of described inverted U pipe, in the top of dynamic pressure valve and right pipeline, the caliber of static pressure valve top is slightly less than the diameter of red ball float and blue ball float.On mounting plate, on the vertical center line of inverted U pipe, scale is installed, before testing the speed, is ensured the zero line on red ball float and blue ball float aligning and scale.
Underwater towed-body comprises housing, plug, worry net, through hole, impulse interface, backflow interface, stablizes rudder plate, centre of gravity adjustment piece, tow rope ring, return flow line and impulse passage.Its annexation is: described housing is hollow column construction, is processed with through hole in the center of housing head fluoran stream surface, and through hole and impulse passage connect.The through hole of the vertical direction of processing in the housing that described impulse passage is towed body under water, impulse interface is installed in the upper end of impulse passage, and lower end seals by plug.Return flow line is the through hole of another vertical direction of the interior processing of housing of towed body under water, installs back stream interface in the upper end of return flow line.Described stable rudder plate is arranged in the afterbody of underwater towed-body housing, stablizes rudder plate along housing center line symmetry.Centre of gravity adjustment piece is fixed in housing, and the center of gravity of underwater towed-body is overlapped with centre of buoyancy.
The integrated connection of speed measuring device closes: the mounting plate of pick-up unit is fixed on the ship side of ship to be detected, and the vertical interface of the left pipeline of inverted U pipe is connected with pressure guiding pipe by dynamic pressure valve, and pressure guiding pipe connects by impulse interface and impulse passage.The vertical interface of the right pipeline of inverted U pipe is connected with recirculatory pipe by static pressure valve, and recirculatory pipe connects by backflow interface and return flow line.Described tow rope is y-type structure, and its divergent ends is connected with the tow rope ring on underwater towed-body housing, and the other end is articulated on tested ship.Finally by binding strap, recirculatory pipe and pressure guiding pipe and tow rope are banded together.
In the right pipeline of described inverted U pipe, be provided with to disappear and move box, described in disappear and move box and inverted U pipe is structure as a whole, the diameter that moves box of disappearing is greater than the caliber of inverted U pipe.
The position of described scale on mounting plate is adjustable up and down.
On mounting plate, the position of nonadjustable signal longitudinally processes waist type groove, and scale can slide up and down in this waist type groove, fixes after sliding into desired location by register pin.
The position that installs back stream interface and impulse interface on the housing of described underwater towed-body arranges kuppe.
Install and consider net in the porch of described through hole.
Beneficial effect:
(1) this apparatus structure is simple, and volume, weight are little, are easy to be applied to towing trial ship and carry out the test of ship's speed.
(2) in pick-up unit the scale of scale corresponding be the speed of a ship or plane of left side liquid level under corresponding height, thereby the travel speed of checking tested ship that can be intuitively real-time.
(3) in the right pipeline of inverted U pipe, be provided with to disappear and move box, can eliminate and wave or run to shake etc. and cause the change of inverted U pipe upward pressure to cause the variation of water colunm height to ensure the accuracy of measuring because of hull.
Brief description of the drawings
Fig. 1 is a kind of portable boat of the present invention speed measuring device structure collectivity schematic diagram.
Fig. 2 is underwater towed-body structural representation of the present invention.
Wherein: 1-mounting plate, 2-static pressure valve, 3-dynamic pressure valve, 4-water-filling nozzle, 5-water injection valve, 6-inverted U pipe, the red ball float of 7-, 8-scale, 9-gas injection valve, the blue ball float of 10-, 11-disappears and moves box, 12-drain tap, 13-gas outlet, 14-tow rope, 15-pressure guiding pipe, 16-recirculatory pipe, 17-tow rope ring, 18-underwater towed-body, 19-kuppe, 21-plug, 22-considers net, 23-through hole, 24-impulse interface, 25-backflow interface, 26-stablizes rudder plate, 27-centre of gravity adjustment piece, 28-return flow line, 29-impulse passage.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The present embodiment provides a kind of portable boat speed measuring device, and this apparatus structure is simple, and volume, weight are little, are easy to be applied to towing trial ship and carry out the test of ship's speed.
Fig. 1 has shown the general structure of this portable boat speed measuring device, and this device comprises pick-up unit, underwater towed-body 18, tow rope 14, recirculatory pipe 16 and pressure guiding pipe 15.Wherein pick-up unit is fixed on the ship side of ship to be detected, and pick-up unit is connected with underwater towed-body 18 with pressure guiding pipe 15 by recirculatory pipe 16.Tow rope 14 is y-type structure, and its divergent ends is connected with the corresponding tow rope ring 17 on underwater towed-body 18, and the other end is articulated on tested ship, and guarantee underwater towed-body 18 is synchronizeed and travelled with tested ship.For reducing the impact of fluid resistance on recirculatory pipe 16 and pressure guiding pipe 15 in water, by binding strap, recirculatory pipe 16 and pressure guiding pipe 15 are bundled with tow rope 14, rely on tow rope 14 to bear towing tension, guarantee recirculatory pipe 16 and pressure guiding pipe 15 can normally be worked.
Pick-up unit comprises mounting plate 1, static pressure valve 2, dynamic pressure valve 3, water-filling nozzle 4, water injection valve 5, inverted U pipe 6, red ball float 7, scale 8, gas injection valve 9, blue ball float 10, disappears and move box 11, drain tap 12 and gas outlet 13.For making the one-piece construction versatility of speed measuring device high, on device, the valve of configuration is the stop valve of standard.
The annexation of pick-up unit is:
Mounting plate 1 is fixed on the ship side of ship to be detected, and inverted U pipe 6 is vertically fixed on mounting plate 1, and symmetrical along the vertical center line of mounting plate 1.The lower end of inverted U pipe 6 left and right pipelines is provided with horizontal interface and vertical interface (lower end at inverted U pipe 6 left and right pipelines in the present embodiment is respectively connected a three-way pipe), and the horizontal interface at two ends is located along the same line.The horizontal interface of inverted U pipe 6 left pipelines is connected with water-filling nozzle 4 by water injection valve 5, and the vertical interface of left pipeline is connected with pressure guiding pipe 15 by dynamic pressure valve 3, and pressure guiding pipe 15 accesses underwater towed-body 18.The horizontal interface of inverted U pipe 6 right pipelines is connected with gas outlet 13 by drain tap 12, and the vertical interface of right pipeline is connected with recirculatory pipe 16 by static pressure valve 2, and recirculatory pipe 16 accesses underwater towed-body 18.The top of inverted U pipe 6 arranges gas injection valve 9.
In the left pipeline of inverted U pipe 6, be placed with red ball float 7, in right pipeline, be placed with blue ball float 10, red ball float 7 is identical with the diameter of blue ball float 10, is all less than or equal to the caliber of inverted U pipe 6, ensures that red ball float 7 and blue ball float 10 can fluctuate freely in inverted U pipe 6.Can not fall on static pressure valve 2 or dynamic pressure valve 3 in order to ensure ball float, the caliber at described inverted U pipe A place (top of dynamic pressure valve 3 in left pipeline) and B place (top of static pressure valve 2 in right pipeline) is slightly less than the diameter of red ball float 7 and blue ball float 10, even the in the situation that of being filled with without extraneous medium like this, also can ensure that ball float can not fall on static pressure valve 2 and dynamic pressure valve 3 in pipeline.
In the right pipeline of inverted U pipe 6, be provided with to disappear and move box 11, disappear that to move box 11 are a bit of hollow cylinders, the pipeline of inverted U pipe 6, has larger sectional area relatively.Under the condition of double altitudes, the pipeline with relative inverted U pipe 6 has larger volume like this, can eliminate and waves or run to shake etc. and cause the change of inverted U pipe 6 upward pressures to cause the variation of water colunm height because of hull.
On mounting plate 1, on the vertical center line of inverted U pipe 6, scale 8 is installed, the effect of scale 8 is instruction speed of a ship or plane.For making two ball floats on same datum line can be corresponding with " zero-bit " on scale 8 easily, the Position Design of scale 8 is become to upper and lower adjustable, concrete grammar is: on mounting plate 1, the position of nonadjustable signal 8 longitudinally processes waist type groove, scale 8 can slide up and down in waist type groove, to after scale 8 installations, can make its adjusting of doing upper and lower position on mounting plate 1 like this, fix by register pin after being adjusted to desired location.
The structure of underwater towed-body 18 as shown in Figure 2.
Underwater towed-body 18 mainly comprises: housing, plug 21, consider net 22, through hole 23, impulse interface 24, backflow interface 25, stablize rudder plate 26, centre of gravity adjustment piece 27, tow rope ring 17, return flow line 28 and impulse passage 29.
Housing is hollow column construction, for ensureing that underwater towed-body 18 can effectively reach pressure information in inverted U pipe 6, the center of towed body 18 head fluoran stream surfaces is processed with through hole 23 under water, through hole 23 connects with impulse passage 29, impulse passage 29 is the through hole of the vertical direction of the interior processing of housing of towed body 18 under water, the upper end of impulse passage 29 is connected with pressure guiding pipe 15 by impulse interface 24, thereby the hydraulic signal collecting is reached after impulse passage 29, then enter by pressure guiding pipe 15 in the left pipeline of inverted U pipe 6.For ensureing that underwater towed-body 18 is in operational process, to after the hydraulic signal input impulse passage 29 collecting, can all be passed in the pipeline in inverted U pipe 6 left sides, processing after impulse passage 29 and through hole 23, by the opening encapsulation of impulse passage 29 lower ends, after encapsulation, should ensure watertight with plug 21.
Return flow line 28 is the through hole of another vertical direction of processing in the housing of towed body 18 under water, and the upper end of return flow line 28 is connected with recirculatory pipe 16 by backflow interface 25, lower end directly with extraneous perforation.The effect of return flow line 28 is in the time that left side pipeline water column reduces, and the water column in right inverted U pipe 6 pipeline is drained into the external world.The effect of impulse interface 24 and backflow interface 25 is to dock with pressure guiding pipe 15 and recirculatory pipe 16, makes the pipeline in pipeline and the underwater towed-body 18 in inverted U pipe 6 form path.
For reducing the impact of fluid resistance on recirculatory pipe 16, pressure guiding pipe 15 and underwater towed-body stream interface 18 last time 25, impulse interface 24 joints in the device course of work, be provided with kuppe 19 in the position that installs back stream interface 25 and impulse interface 24.
Because underwater towed-body 18 is with ship navigation, for avoiding foreign material in water to enter in through hole 23, its porch be provided with consider net 22 with waterproof in foreign material enter in impulse passage 29.
Stablize the afterbody that rudder plate 26 is arranged in underwater towed-body 18 housings, stablize rudder plate 26 along housing center line symmetry, centre of gravity adjustment piece 27 is fixed in housing, makes the center of gravity of underwater towed-body 18 be positioned at centre of buoyancy.The function of stablizing rudder plate 26 and centre of gravity adjustment piece 27 ensures the attitude stability of underwater towed-body 18 while navigating by water in water.
The principle of work of this speed measuring device is:
Preliminary work before testing the speed:
(1) water filling:
Before testing the speed, static pressure valve 2, dynamic pressure valve 3 and vent valve 12 are placed in to closed condition, water injection valve 5 and gas injection valve 9 are placed in opening, its objective is water column and the bubble of in inverted U pipe 6, setting up certain altitude.Concrete grammar is: in the pipe in inverted U pipe 6 left sides, inject a certain amount of water by water injection valve 5 from water-filling nozzle 4, hot ball float 7 rises to behind the scale position of the top of scale 8, closes water injection valve 5.Open vent valve 12, adopt above-mentioned same method in the pipe on inverted U pipe 6 right sides, to inject a certain amount of water through vent valve 12 from gas outlet 13, make blue ball float 10 rise to the ducted liquid level parallel position in a left side after, close vent valve 12.
(2) eliminate the bubble in inverted U pipe 6
From gas injection valve 9 to the interior water filling of inverted U pipe 6, after filling water in inverted U pipe 6, close gas injection valve 9 lentamente.Now inverted U pipe 6 is interior may have a little bubble to exist, for eliminating the bubble in inverted U pipe 6, the measure of taking is: first gas injection valve 9 is set to opening, then observing bubble is in the left pipeline or right pipeline of inverted U pipe 6, according to the position at bubble place, if bubble is opened water injection valve 5 in left pipe, if bubble vent valve 12 in right pipe.And inject appropriate water from gas injection valve 9, and by closing water injection valve 5 or vent valve 12 after the removal of bubbles in inverted U pipe 6, closing gas injection valve 9 simultaneously, can ensure to be like this full of liquid in inverted U pipe 6.(repeating this step until there is no bubble in inverted U pipe 6).
(3) eliminate the bubble in recirculatory pipe and pressure guiding pipe
For the loop in assurance device is all full of water, open water injection valve 5, open dynamic pressure valve 3 simultaneously, to water-filling nozzle 4 water-fillings, the air in pressure guiding pipe 15 can be got rid of like this, in pressure guiding pipe 15, be full of after water, close dynamic pressure valve 3.Open vent valve 12, from gas outlet 13 water fillings, open static pressure valve 2 simultaneously, air in recirculatory pipe 16 can be got rid of like this, now, the pipeline in whole device has all been full of water, in pipeline without bubble.
(4) in inverted U pipe 6, set up air column
For demonstrating in the course of the work the headway of ship, need in inverted U pipe 6, set up air column, make tested ship in navigation process, the water column of the left pipeline of inverted U pipe 6 and right pipeline, in different height, is converted out the speed of a ship or plane of ship by both differences in height.
According to liquid incompressibility, and gas has compressible principle.In the inverted U pipe 6 that plays Presentation Function, need to set up air column, institute's air column of building is between red ball float 7 and blue ball float 10, for the accuracy of the tested ship speed of a ship or plane value that demonstrates on assurance device, before testing the speed, red ball float 7 should be adjusted down on same datum line with blue ball float 10 simultaneously.Implementation procedure is: first open water injection valve 5 left inverted U pipe 6 ducted water is emitted to some, close water injection valve 5.Open drain tap 12 simultaneously, right inverted U pipe 6 ducted water is emitted to some, close drain tap 12.So just between red ball float 7 and blue ball float 10, set up one section of air column, being pointed out that need be by gas injection valve 9 in normally open (ensureing the 6 ducted pressure equilibriums in left and right of inverted U pipe) in the time doing above-mentioned work.For ensureing that red ball float 7 and blue ball float 10 are on same datum line, extraneous water source is low from water-filling nozzle 4(left side fluid column, open water injection valve) or the exhausr port located of gas outlet (the right fluid column is low, opens vent valve) inject, make two ball floats on same level line, closing gas injection valve 9.Finally adjust the position of scale 8 on mounting plate 1, make the zero graduation line of scale 8 and two ball floats on same level line, after adjusting, by register pin, scale 8 is fixed on mounting plate 1.
The principle that adopts this device to carry out ship's speed measurement is:
Before testing the speed, red ball float 7 is adjusted on the zero graduation line of scale 8 with blue ball float 10, be located on same benchmark.While testing the speed, underwater towed-body 18 synchronously navigates by water with the ship that tested the speed, the through hole 23 that its head fluoran stream surface center is offered reaches the flowing pressure collecting in the left pipeline of inverted U pipe 6, now the tested ship headway of the lifting height h(under the effect of flowing pressure of the water column in left pipeline is faster, and the water column in left pipeline is higher).When after the rising h of the water column in the left pipeline of inverted U pipe 6, under the effect of the gas column in inverted U pipe 6 between two ball floats, the water column decline h of inverted U pipe 6 right pipelines, thus the liquid level height of formation in inverted U pipe 6 left and right pipelines is poor.According to bernoulli principle, in the time of the liquid level lifting height h of left side, the speed of a ship or plane of detected ship
in the present embodiment, in order to check the speed of a ship or plane intuitively, what the scale of scale 8 was corresponding is the speed of a ship or plane of left side liquid level under corresponding height.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. a portable boat speed measuring device, is characterized in that, comprising: pick-up unit, underwater towed-body (18), tow rope (14), recirculatory pipe (16) and pressure guiding pipe (15);
Described pick-up unit comprises: mounting plate (1), static pressure valve (2), dynamic pressure valve (3), water-filling nozzle (4), water injection valve (5), inverted U pipe (6), red ball float (7), scale (8), gas injection valve (9), blue ball float (10), disappear and move box (11), drain tap (12) and gas outlet (13); It is upper that described inverted U pipe (6) is vertically fixed on mounting plate (1), and symmetrical along the vertical center line of mounting plate (1); The lower end of the left pipeline of inverted U pipe (6) and right pipeline is provided with horizontal interface and vertical interface, and two horizontal interfaces are located along the same line; The horizontal interface of the left pipeline of inverted U pipe (6) is connected with water-filling nozzle (4) by water injection valve (5); The horizontal interface of the right pipeline of inverted U pipe (6) is connected with gas outlet (13) by drain tap (12); The top of inverted U pipe (6) arranges gas injection valve (9); In the left pipeline of inverted U pipe (6), be placed with red ball float (7), in right pipeline, be placed with blue ball float (10); Described red ball float (7) is identical with the diameter of blue ball float (10), is all less than or equal to the caliber of inverted U pipe (6), ensures that red ball float (7) and blue ball float (10) can fluctuate freely in inverted U pipe (6); In the left pipeline of described inverted U pipe (6), in the top of dynamic pressure valve (3) and right pipeline, the caliber of static pressure valve (2) top is slightly less than the diameter of red ball float (7) and blue ball float (10); On the vertical center line of the upper inverted U pipe (6) of mounting plate (1), scale (8) is installed, before testing the speed, is ensured the zero line on red ball float (7) and blue ball float (10) aligning and scale (8);
Described underwater towed-body (18) comprising: housing, plug (21), consider net (22), through hole (23), impulse interface (24), backflow interface (25), stablize rudder plate (26), centre of gravity adjustment piece (27), tow rope ring (17), return flow line (28) and impulse passage (29); Its annexation is: described housing is hollow column construction, is processed with through hole (23) in the center of housing head fluoran stream surface, and through hole (23) connects with impulse passage (29); Described impulse passage (29) is the through hole of the vertical direction of the interior processing of housing of towed body (18) under water, and impulse interface (24) is installed in the upper end of impulse passage (29), and lower end is by plug (21) sealing; Return flow line (28) is the through hole of another vertical direction of the interior processing of housing of towed body (18) under water, and in return flow line, the upper end of (28) installs back stream interface (25); Described stable rudder plate (26) is arranged in the afterbody of underwater towed-body (18) housing, stablizes rudder plate (26) along housing center line symmetry; Centre of gravity adjustment piece (27) is fixed in housing, and the center of gravity of underwater towed-body (18) is overlapped with centre of buoyancy;
The integrated connection of described speed measuring device closes: the mounting plate (1) of pick-up unit is fixed on the ship side of ship to be detected, the vertical interface of the left pipeline of inverted U pipe (6) is connected with pressure guiding pipe (15) by dynamic pressure valve (3), and pressure guiding pipe (15) connects by impulse interface (24) and impulse passage (29); The vertical interface of the right pipeline of inverted U pipe (6) is connected with recirculatory pipe (16) by static pressure valve (2), and recirculatory pipe (16) connects by backflow interface (25) and return flow line (28); Described tow rope (14) is y-type structure, and its divergent ends is connected with the tow rope ring (17) on underwater towed-body (18) housing, and the other end is articulated on tested ship; Finally by binding strap, recirculatory pipe (16) and pressure guiding pipe (15) are banded together with tow rope (14).
2. a kind of portable boat speed measuring device as claimed in claim 1, it is characterized in that, in the right pipeline of described inverted U pipe (6), being provided with disappears moves box (11), described disappearing moved box (11) and inverted U pipe (6) and is structure as a whole, and the diameter that moves box (11) of disappearing is greater than the caliber of inverted U pipe (6).
3. a kind of portable boat speed measuring device as claimed in claim 1, is characterized in that, the position of described scale (8) on mounting plate (1) is adjustable up and down.
4. a kind of portable boat speed measuring device as claimed in claim 3, it is characterized in that, position at the upper nonadjustable signal (8) of mounting plate (1) longitudinally processes waist type groove, and scale (8) can slide up and down in this waist type groove, fixes after sliding into desired location by register pin.
5. a kind of portable boat speed measuring device as claimed in claim 1, is characterized in that, the position that installs back stream interface (25) and impulse interface (24) on the housing of described underwater towed-body (18) arranges kuppe (19).
6. a kind of portable boat speed measuring device as claimed in claim 1, is characterized in that, installs and considers net (22) in the porch of described through hole (23).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210364122.XA CN102841216B (en) | 2012-09-26 | 2012-09-26 | Portable speed measuring device for ship |
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| CN201210364122.XA CN102841216B (en) | 2012-09-26 | 2012-09-26 | Portable speed measuring device for ship |
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| CN102841216B true CN102841216B (en) | 2014-07-02 |
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| CN109541255B (en) * | 2018-11-29 | 2021-01-08 | 中国船舶重工集团公司第七0七研究所九江分部 | Integrated pressure-guiding type water speed sensor for speed measurement of amphibious vehicle on water |
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| FR2545220B1 (en) * | 1983-04-29 | 1985-11-15 | Giraud Patrick | MULTIFUNCTIONAL INDICATOR (SPEED, MILEAGE, DRIFT ANGLE ...), FOR SAILBOARDS AND OTHER BOATS |
| EP0152771A2 (en) * | 1984-02-02 | 1985-08-28 | Josef Dipl.-Ing. Pomikacsek | Device for measuring the speed of a surf board |
| US5597952A (en) * | 1994-09-30 | 1997-01-28 | Waterstrike Incorporated | Speed measuring and compensation apparatus for jet-propelled watercraft |
| CN101893644A (en) * | 2010-06-23 | 2010-11-24 | 江西省智成测控技术研究所有限责任公司 | Extraction method and extraction device of static pressure of differential pressure type navigational speed measuring instrument |
| CN202815002U (en) * | 2012-09-26 | 2013-03-20 | 中国船舶重工集团公司第七一〇研究所 | Portable ship speed measuring device |
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| Publication number | Publication date |
|---|---|
| CN102841216A (en) | 2012-12-26 |
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