An underwater dual-axis free-rotation three-sensor linkage force measuring device

Abstract

The present invention provides an underwater dual-axis free-rotating three-sensor linkage force measuring device, including an inclination sensor, a tension sensor, a depth sensor, a linkage support mechanism, a load-bearing frame, a transverse axis connection mechanism, a longitudinal axis connection mechanism, a housing and a test piece, wherein the linkage support mechanism sequentially connects the inclination sensor, the tension sensor and the depth sensor from bottom to top, and the transverse axis connection mechanism laterally penetrates the longitudinal axis connection mechanism and the linkage support mechanism. The beneficial effects of the present invention are as follows: the test piece and the tension sensor are collinear, the inclination sensor and the tension sensor are fixedly arranged on the linkage support mechanism, and the tension value and inclination value of the test piece under different working conditions can be synchronously measured; the tension value is corrected by the inclination value, so as to obtain more accurate actual lift and drag parameters, providing reliable and accurate data for calculation; the present invention facilitates the measurement of tension and inclination values ​​under different working conditions through the structural design of the force measuring device, and solves the problem of the introduction of heave and sink force errors in the tension value.

Description

Technical Field

[0001] The invention relates to a sensor device, mainly an underwater dual-axis free-rotating three-sensor linkage force measuring device. Background Art

[0002] The tangential and normal drag coefficients of underwater flexible bodies such as tow cables, linear arrays, and tail ropes are directly related to their fluid resistance and underwater spatial configuration. To simulate and calculate underwater towed bodies, it is necessary to first know their drag coefficients. At present, the drag coefficient is usually measured by the pool towing measurement method at home and abroad. The flow resistance of the towed specimen is measured by a tension sensor mounted on a large driving device. Due to factors such as the length and depth of the pool and the speed of the driving device, the pool test cannot measure the gravity cable with a large inclination angle during towing, and the tension sensor is difficult to measure large specimens due to the limited strength of the tension head due to driving restrictions. The sensor mounted on the driving device is only a tension sensor, which cannot synchronously measure the inclination of the specimen. In actual towing, the test body rarely has zero buoyancy. There will inevitably be floating and sinking phenomena, and there will be pitch angles. The measured tension includes the heave force of the specimen in the water, which has a large error. To accurately measure the actual tension value, it is necessary to simultaneously measure the inclination angle of the specimen when it is subjected to force, and use the pitch inclination angle to convert the corrected tension measurement value, so as to obtain a more accurate actual lift and drag, and further calculate the hydrodynamic coefficient. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide an underwater dual-axis free-rotating three-sensor linkage force measuring device. Through the structural design of the force measuring device, the measurement of tension and inclination values ​​under different working conditions is facilitated, and the problem of the introduction of errors of heave force in the tension value is solved.

[0004] The purpose of the present invention is achieved through the following technical solutions. This underwater dual-axis free-rotation three-sensor linkage force measuring device mainly includes an inclination sensor, a tension sensor, a depth sensor, a linkage support mechanism, a load-bearing frame, a transverse axis connection mechanism, a longitudinal axis connection mechanism, a shell and a test piece, wherein the linkage support mechanism sequentially connects the inclination sensor, the tension sensor and the depth sensor from bottom to top, the transverse axis connection mechanism laterally penetrates the longitudinal axis connection mechanism and the linkage support mechanism, wherein the linkage support mechanism can freely rotate around the transverse axis in a vertical plane, the transverse axis connection mechanism, the longitudinal axis connection mechanism and the load-bearing frame are connected and fixed by screws, a shell is arranged outside the entire structure, and the test piece is fixed to the tension sensor by eye screws and is collinear.

[0005] Furthermore, the linkage support mechanism includes a clamp and a cross connecting plate. The clamp is in the shape of a finger ring and is fixedly connected to the cross connecting plate. The linkage support mechanism is symmetrically arranged on the upper and lower sides of the tension sensor. The cross connecting plates on the upper and lower sides clamp the tension sensor, and the inclination sensor and the depth sensor are respectively fixedly connected to the clamps arranged above and below.

[0006] Furthermore, the load-bearing frame is in the shape of a "door", with a longitudinal axis mounting hole arranged on the top, and transverse axis mounting holes and a plurality of screw holes symmetrically arranged on both sides.

[0007] Furthermore, the transverse axis connection mechanism includes a transverse axis and a transverse bearing. Transverse bearings are arranged at both ends of the transverse axis and penetrate through the transverse axis mounting holes of the load-bearing frame.

[0008] Furthermore, the longitudinal axis connection mechanism includes a longitudinal axis sleeve and a longitudinal bearing. The longitudinal bearing is arranged at the bottom of the longitudinal axis sleeve and is fixedly arranged in the longitudinal axis mounting hole of the load-bearing frame.

[0009] Furthermore, the shell includes a deflector and a bearing sleeve, the bearing sleeve is arranged on the top of the deflector and covers the protruding longitudinal axis connecting mechanism, and the deflector is irregular in shape and covers the entire structure.

[0010] Furthermore, the deflector is provided with a wire of the sensor, and the wire extends upward to the cabin data acquisition instrument through the hollow longitudinal shaft sleeve and the through hole of the load-bearing sleeve.

[0011] The beneficial effects of the present invention are:

[0012] 1. The test piece and the tension sensor are in the same line, and the inclination sensor and the tension sensor are fixedly arranged on the linkage support mechanism, which can synchronously measure the tension value and inclination value of the test piece under different working conditions, providing convenience for the calculation of the hydrodynamic coefficient of the test piece;

[0013] 2. Use the inclination angle to correct the pulling force value, so as to obtain more accurate actual lift and drag parameters, providing reliable and accurate data for calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the decomposition of the present invention;

[0015] Figure 2 It is a schematic diagram of the test state of the present invention.

[0016] Explanation of the reference numerals: inclination sensor 1, tension sensor 2, depth sensor 3, clamp 4, cross connecting plate 5, load-bearing frame 6, transverse axis 7, transverse bearing 8, longitudinal axis sleeve 9, longitudinal bearing 10, air deflector 11, load-bearing sleeve 12, wire 13, test piece 14. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings:

[0018] Embodiment 1: This underwater dual-axis free-rotation three-sensor linkage force measuring device mainly includes an inclination sensor 1, a tension sensor 2, a depth sensor 3, a linkage support mechanism, a load-bearing frame 6, a transverse axis connection mechanism, a longitudinal axis connection mechanism, a shell and a test piece 14. The linkage support mechanism sequentially connects the inclination sensor 1, the tension sensor 2 and the depth sensor 3 from bottom to top. The transverse axis connection mechanism laterally penetrates the longitudinal axis connection mechanism and the linkage support mechanism, wherein the linkage support mechanism can freely rotate in a vertical plane around the transverse axis. The transverse axis connection mechanism, the longitudinal axis connection mechanism and the load-bearing frame 6 are connected and fixed by screws. A shell is arranged outside the entire structure. The test piece 14 is fixed to the tension sensor 2 by eye screws and is collinear. The test piece and the tension sensor are collinear, and the inclination sensor and the tension sensor are fixedly arranged in the linkage support mechanism. The tension value and the inclination value of the test piece under different working conditions can be synchronously measured, and the tension value can be corrected by the inclination value, so that more accurate actual lift and drag parameters can be obtained, providing convenient and reliable data for the calculation of the hydrodynamic coefficient of the test piece.

[0019] Embodiment 2: Based on embodiment 1, Figure 1 As shown, the linkage support mechanism includes a hoop 4 and a cross connecting plate 5. The hoop 4 is in the shape of a finger ring and is fixedly connected to the cross connecting plate 5. The linkage support mechanism is symmetrically arranged on the upper and lower sides of the tension sensor 2. The cross connecting plates 5 on the upper and lower sides clamp the tension sensor 2. The inclination sensor 1 and the depth sensor 3 are respectively fixedly connected to the hoop 4 arranged on the upper and lower sides. The inclination sensor, the tension sensor, and the depth sensor are reliably connected together to form a linkage structure with consistent structural weight and symmetry from top to bottom, so that the linkage part rotates around the horizontal axis in a static state to balance itself, eliminating the influence of the sensor's own weight and appearance on the inclination and tension errors.

[0020] Embodiment 3: Based on Embodiment 1, the load-bearing frame 6 is in the shape of a "door", with a longitudinal axis connection mechanism installation hole set on the top, and transverse axis connection mechanism installation holes and a plurality of screw holes symmetrically set on both sides. The load-bearing frame effectively and reliably connects the linkage support structure, the transverse axis connection mechanism, and the longitudinal axis connection mechanism to form a completely symmetrical structural arrangement.

[0021] Embodiment 4: Based on Embodiment 1, the transverse axis connection mechanism includes a transverse axis 7 and a transverse bearing 8. Transverse bearings 8 are provided at both ends of the transverse axis 7 and penetrate the transverse axis connection mechanism installation hole of the load-bearing frame 6. The transverse axis is passed through the middle of the tension sensor and fixed to the load-bearing frame with a transverse bearing, so that the three-sensor linkage device can be kept on the central axis of the frame and rotate freely along the vertical plane.

[0022] Embodiment 5: Based on Embodiment 1, the longitudinal axis connection mechanism includes a longitudinal axis sleeve 9 and a longitudinal bearing 10. The longitudinal bearing 10 is arranged at the bottom of the longitudinal axis sleeve 9 and is fixedly arranged in the longitudinal axis mounting hole of the bearing frame 6. The longitudinal axis mounting hole arranged on the bearing frame is adopted, and the longitudinal axis sleeve passes through the longitudinal bearing, so as to realize the function of free rotation of the bearing frame along the horizontal plane.

[0023] Example 6: Based on Example 1, the housing includes a fairing 11 and a bearing sleeve 12. The bearing sleeve 12 is arranged on the top of the fairing 11 and covers the protruding longitudinal axis connection mechanism. The fairing 11 is irregular in shape and covers the entire structure. The fairing after optimized design can rotate freely around the bearing sleeve, which can minimize the resistance while keeping the internal eddy current and close to the static water state during towing, reducing the influence of turbulence. The fair tail opening of the fairing allows the mounted test piece to drive the sensor to rotate freely around the horizontal axis without interfering with the fairing.

[0024] Embodiment 7: Based on embodiment 6, Figure 2 As shown, the wires 13 of the three sensors are arranged in the deflector 11, and the wires 13 extend upward to the cabin data acquisition instrument through the hollow longitudinal shaft sleeve 9 and the through hole of the bearing sleeve 12. The wires arranged in this structure do not affect the free rotation of the three sensors' linkage force measuring device.

[0025] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the protection scope of the claims attached to the present invention.

Claims

1. An underwater dual-axis free-rotation three-sensor linkage force measuring device, characterized in that: The invention comprises an inclination sensor (1), a tension sensor (2), a depth sensor (3), a linkage support mechanism, a load-bearing frame (6), a transverse axis connection mechanism, a longitudinal axis connection mechanism, a housing and a test piece (14), wherein the linkage support mechanism sequentially connects the inclination sensor (1), the tension sensor (2) and the depth sensor (3) from bottom to top, the transverse axis connection mechanism laterally penetrates the longitudinal axis connection mechanism and the linkage support mechanism, wherein the linkage support mechanism can freely rotate around the transverse axis in a vertical plane, the transverse axis connection mechanism, the longitudinal axis connection mechanism and the load-bearing frame (6) are connected and fixed by screws, a housing is arranged outside the entire structure, and the test piece (14) is fixed to the tension sensor (2) by eye screws and is collinear; The linkage support mechanism comprises a hoop (4) and a cross connecting plate (5); the hoop (4) is in a finger ring shape and is fixedly connected to the cross connecting plate (5); the linkage support mechanism is symmetrically arranged on the upper and lower sides of the tension sensor (2); the cross connecting plates (5) on the upper and lower sides clamp the tension sensor (2); the inclination sensor (1) and the depth sensor (3) are respectively fixedly connected to the hoop (4) arranged above and below; The transverse axis connection mechanism comprises a transverse axis (7) and a transverse bearing (8); transverse bearings (8) are provided at both ends of the transverse axis (7) and penetrate through a transverse axis connection mechanism mounting hole of the load-bearing frame (6); The longitudinal axis connection mechanism comprises a longitudinal axis sleeve (9) and a longitudinal bearing (10); the longitudinal bearing (10) is arranged at the bottom of the longitudinal axis sleeve (9) and is fixedly arranged in the longitudinal axis mounting hole of the load-bearing frame (6).

2. The underwater dual-axis free-rotation three-sensor linkage force measuring device according to claim 1, characterized in that: The load-bearing frame (6) is in the shape of a "door", with a longitudinal axis connecting mechanism mounting hole arranged at the top, and transverse axis connecting mechanism mounting holes and a plurality of screw holes arranged symmetrically on both sides.

3. The underwater dual-axis free-rotation three-sensor linkage force measuring device according to claim 1, characterized in that: The shell comprises a flow deflector (11) and a bearing sleeve (12); the bearing sleeve (12) is arranged on the top of the flow deflector (11) and covers the protruding longitudinal axis connection mechanism; the flow deflector (11) is irregularly shaped and covers the entire structure.

4. The underwater dual-axis free-rotation three-sensor linkage force measuring device according to claim 3, characterized in that: A sensor wire (13) is arranged in the deflector (11), and the wire (13) extends upward through the hollow longitudinal shaft sleeve (9) and the through hole of the load-bearing sleeve (12) to the cabin data acquisition instrument.

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