A composite sensor suitable for high speed measurement

Abstract

The application relates to a composite sensor suitable for high-speed velocity measurement, which is characterized by the following features: the whole is an integrated columnar structure; a layer of vulcanized rubber is covered on the lower end of a phased array transducer located at the bottom to form a streamlined surface; an electronic cabin is installed on the upper end of the phased array transducer; an impedance matching plate is installed in the internal cavity of the electronic cabin, the lower end of a phased array cable is electrically connected with the impedance matching plate; an electromagnetic velocity measurement assembly is installed on the upper end of the electronic cabin; the upper end of the electromagnetic velocity measurement assembly is inserted and positioned with the lower end of a rod body, and the two are sealed and fixedly connected; a handle cover is arranged on the rod body, and the handle is fixed by rotating a locking block into external threads on the upper end of the rod body; an external connecting hole is arranged on the handle to realize the installation of the sensor on a ship body; a connector mounting block is fixed on the upper end of the handle; left and right watertight connectors are mounted on the upper end of the connector mounting block; the lower end of an electromagnetic velocity measurement cable is electrically connected with the electromagnetic velocity measurement assembly, and the upper ends of the two cables are respectively connected with the two watertight connectors. The application solves the problem of instability of acoustic velocity measurement at high speed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of propagation speed measuring device, more particularly to a composite sensor suitable for high speed measurement. BACKGROUND

[0002] The rapidity of the ship occupies a very important position in its many performances, and the improvement of the ship speed puts forward higher requirements for the high-speed working adaptability of the acoustic measuring equipment, such as acoustic log and acoustic depth finder. It has been shown in some cases that the Doppler log appears to have serious speed measurement performance decline or even unable to measure speed when the speed is above 20 kn, and the depth finder also has the problem of unable to measure depth at high speed.

[0003] According to the principle of the ship and the relevant research abroad, a flow layer rich in bubbles close to the ship body will be formed on the bottom surface of the ship when the ship is sailing, which will gradually deteriorate with the increase of the speed and affect the stability of the bottom flow field, and even cavitation phenomenon will occur at very high speed. Since the bubbles around the ship body have considerable drag reduction effect, this research direction has been widely concerned in the field of domestic and foreign ship design, and is one of the main factors that must be considered for the realization of high speed of the ship.

[0004] The acoustic transducer is generally installed close to the ship body at about 1 / 3 of the bow of the ship, Figure 1 near the middle B area), which has better flow field stability in the whole ship, but in actual application, when the speed exceeds 20 kn, the flow field at this position presents complex uncertainty and unpredictability. According to the research report, the main factor affecting the performance of acoustic equipment is the flow bubble of the bow of the ship, which is generally recognized by experts in the industry.

[0005] In view of the sensitivity of acoustic measuring equipment to bubbles in the measurement area, when the flow field bubble at the installation area is rich enough to affect the normal emission and reception of the transducer sound wave at high speed, it will lead to the decrease of speed measurement accuracy and stability, and even unable to measure speed. SUMMARY

[0006] The present application proposes a composite sensor suitable for high speed measurement in view of the deficiencies of the prior art.

[0007] The above-mentioned purpose of the present application is realized by the following technical scheme:

[0008] A composite sensor suitable for high speed measurement, the composite sensor is an integrated columnar structure as a whole; comprising a phased array transducer, an electronic cabin, an electromagnetic speed measuring assembly, a rod body, a handle, a watertight connector mounting block, a watertight connector one, a watertight connector two, a phased array cable, an electromagnetic speed measuring cable, an impedance matching plate, a locking block;

[0009] The phase array transducer is located at the bottom of the sensor, and the lower end thereof is covered with a layer of vulcanized rubber by a vulcanization process to form a streamlined surface; the electronic cabin is installed on the upper end of the phase array transducer in a sealed contact manner; the lower end of the electronic cabin is open to form an internal cavity, and the impedance matching board is installed in the internal cavity of the electronic cabin, and the lower end of the phase array cable is electrically connected with the impedance matching board; the electromagnetic speed measuring assembly is installed on the upper end of the electronic cabin in a sealed contact manner; the upper end of the electromagnetic speed measuring assembly is inserted and positioned with the lower end of the rod body and is fixedly connected in a sealed manner; the upper end of the rod body is an externally threaded column, and the handle is arranged on the externally threaded column in a lower limiting manner and is fixed by screwing the locking block into the threaded column to fix the handle; an external hole is arranged on the handle to be fixedly connected with the fixing frame or the liftable support at the lower end of the ship body through the external hole, so that the composite sensor is inserted into the water below the ship body; the connector mounting block is fixed on the upper end of the handle; the water-tight connectors one and two are installed on the upper end of the connector mounting block; the lower end of the electromagnetic speed measuring cable is electrically connected with the electromagnetic speed measuring assembly, and the upper ends of the two cables are connected with the water-tight connectors one and two, respectively; the middle part of the shell of the electromagnetic speed measuring assembly adopts a column structure with a wing-shaped cross section.

[0010] Moreover, the phase array transducer is a planar array composed of 1-3 type piezoelectric composite ceramic material, the interval between adjacent transducer elements is 1.25 mm, the effective diameter of the piezoelectric ceramic phase is 100±2 mm, and the resonant frequency is 600 kHz.

[0011] Moreover, the impedance matching board is composed of a transformer, an inductor and a resistor, contains four impedance conversion channels, and has the functions of tuning and impedance conversion.

[0012] Moreover, the electromagnetic speed measuring assembly includes a line splitter, the shell, a guide rod, a coil assembly and an electrode assembly; the line splitter is fixed on the upper end of the shell; a rectangular through hole is arranged in the middle part of the shell, a waist-shaped hole is arranged at the center axis of the shell at the upper end of the rectangular through hole, and the two ends of the guide rod are both waist-shaped shafts, one end of which is inserted into the waist-shaped hole of the shell and is fastened and sealed by adhesion; the coil assembly and the other end of the guide rod are fastened and sealed by adhesion.

[0013] Moreover, the shell of the electromagnetic speed measuring assembly is internally provided with a wire hole, the phase array cable passes through the wire hole and is physically and electromagnetically isolated from the coil assembly of the electromagnetic speed measuring assembly; the phase array cable and the electromagnetic speed measuring cable pass through two isolated wire channels in the line splitter, respectively, and the phase array cable and the electromagnetic speed measuring cable are respectively provided with metal screen shielding pipes in the rod body.

[0014] Moreover, the electrode plate of the electrode assembly adopts a conformal design structure with the wing-shaped shell to reduce water flow disturbance caused by the shape at high speed;

[0015] Moreover, the electrode of the electrode assembly adopts a conformal design structure with the corresponding electrode plate, so as to reduce water flow disturbance caused by the shape at high speed.

[0016] The present application has the advantages and positive effects that:

[0017] 1. The present application adopts a structure of combining the rod type electromagnetic speed measuring assembly with the phased array transducer array, so as to realize accurate data compensation of acoustic speed measurement by electromagnetic speed measurement at high speed, and solve the problem of instability of acoustic speed measurement at high speed.

[0018] 2. The lower end of the phased array transducer of the present application is covered with a layer of vulcanized rubber by vulcanization process to form a streamline surface, so as to improve the acoustic speed measurement performance at high speed.

[0019] 2. The middle part of the shell of the electromagnetic speed measuring assembly adopts a column structure with a wing-like cross section, so as to greatly reduce the influence of water flow disturbance near the electromagnetic speed measuring assembly on the flow speed signal, improve the speed measurement stability, and improve the cavitation critical speed, so as to facilitate stable speed measurement at high speed.

[0020] 3. The electrode plate of the electrode assembly of the present application adopts a conformal design structure with the wing-like shape of the shell, and the electrode adopts a conformal design structure with the corresponding electrode plate, so as to reduce water flow disturbance caused by the shape at high speed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of ship bottom current and bubble distribution;

[0022] Figure 2 is an appearance diagram of the composite sensor of the present application; 2a is a front view; 2b is a side view;

[0023] Figure 3 is a whole sectional view of the composite sensor of the present application;

[0024] Figure 4 is a structure schematic diagram of the electromagnetic speed measuring assembly of the present application; 4a is a sectional view; 4b is a side appearance diagram;

[0025] Figure 5 is a structure schematic diagram of the coil assembly of the present application;

[0026] Figure 6 is a sectional view of the coil assembly of the present application;

[0027] Figure 7 is a structure schematic diagram of the electrode assembly of the present application;

[0028] Figure 8 is a circuit diagram of the impedance matching plate of the present application;

[0029] Figure 9is the wiring diagram of the water-tight connector and the wire;

[0030] Figure 10 is the schematic diagram of the phased array, 10a, front view; 10, back view;

[0031] Figure 11 is the schematic diagram of the lead of the back radiation surface of the phased array. DETAILED DESCRIPTION

[0032] The structure of the present application will be further described below in conjunction with the accompanying drawings and by embodiments. It should be noted that the embodiments are descriptive rather than limiting.

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Please refer to the accompanying Figures 2-11 A composite sensor suitable for high-speed velocity measurement of the present application comprises:

[0037] The phased array transducer 1, the electronic cabin 2, the electromagnetic speed measurement assembly 3, the rod body 4, the handle 5, the water-tight connector mounting block 6, the water-tight connector one 7, the water-tight connector two 8, the phased array cable 9, the electromagnetic speed measurement cable 10, the impedance matching plate 11, the double-headed stud 12, the locking block 13 and the like.

[0038] The upper end of the phased array transducer 1 is flat, and the electronic cabin 2 is installed on the upper surface of the phased array transducer 1, and the sealing between the two is realized through an O-ring. The lower end of the phased array transducer is covered with a layer of vulcanized rubber by a vulcanization process to form a streamlined surface, which can improve the acoustic measuring speed performance at high speed.

[0039] The lower end of the electronic cabin 2 is open, the impedance matching plate 11 is installed in the internal cavity of the electronic cabin 2, and the phased array cable 9 is electrically connected with the impedance matching plate 11.

[0040] The upper end of the electronic cabin 2 is flat, and the electromagnetic speed measuring assembly 3 is installed on the upper surface of the electronic cabin 2, and the sealing between the two is realized through an O-ring.

[0041] The upper end of the electromagnetic speed measuring assembly 3 is a protruding shaft structure, which is embedded in the lower end hole of the rod body 4, and the end faces of the two are fitted, and then fastened through a double-headed stud 12 and a nut, and the sealing between the two is realized through an O-ring.

[0042] The upper end of the rod body 4 is an externally threaded column, and the handle 5 is sleeved into the column, and then the handle 5 is fixed by rotating the locking block 13 into the thread.

[0043] The watertight connector mounting block 6 is installed on the upper end surface of the handle 5 and is fastened by screws.

[0044] The watertight connector one 7 and the watertight connector two 8 are installed on the upper end surface of the watertight connector mounting block 6 and are fastened by screws.

[0045] The above-mentioned electromagnetic speed measuring assembly 3 includes a line splitter 31, a shell 32, a guide rod 33, a coil assembly 34, an electrode assembly 35, an O-ring 36, an O-ring 37, etc., and the shell is made of copper material.

[0046] Specifically, the shell 32 is composed of three sections from top to bottom, the upper end flange provides the mounting surface with the line splitter 31, the lower end flange provides the mounting surface with the electronic cabin 2, and the middle part is a column with a wing-shaped cross section. The middle part is provided with a 162x37 rectangular through hole, and a waist-shaped hole is provided at the center axis of the shell at the upper end of the rectangular through hole. The two ends of the guide rod 33 are waist-shaped shafts, one end of which is inserted into the waist-shaped hole of the shell. The design and processing ensure the mutual positional accuracy and the accurate mutual positional relationship between the coil assembly 34 and the shell 32. The guide rod 33 and the shell are fastened and sealed by epoxy resin bonding.

[0047] Specifically, the coil assembly 34 is installed on the guide rod 33 and is fastened by epoxy resin bonding, and is electrically connected with the watertight connector two 8.

[0048] Specifically, the line splitter 31 is fastened with the shell 32 by six fixing screws, two wire routing channels are provided in the middle, the phased array cable 9 and the electromagnetic speed measuring cable 10 are routed separately, and are led out from the upper end protruding shaft center hole and another eccentric hole.

[0049] Specifically, the phased array cable 9 and the electromagnetic velocity measurement cable 10 cannot be physically isolated in the rod body, and can be wrapped with electromagnetic shielding heat shrink tubes outside the cables respectively to effectively shield EMI.

[0050] Specifically, the coil assembly 34 is composed of the upper framework 1-8, the lower framework 1-5, the upper coil core 1-7, the lower coil core 1-2, the upper coil 1-6, the lower coil 1-1, the adjusting block 1-3, the adjusting fastening screw 1-4, and the like. Figure 5 As shown in the figure, from left to right, there are the lower coil 1-1, the lower coil core 1-2, the adjusting block 1-3, the adjusting fastening screw 1-4, the lower framework 1-5, the upper coil 1-6, the upper coil core 1-7, and the upper framework 1-8. The upper coil 1-6 is wrapped outside the upper coil core 1-7, and the lower coil 1-1 is wrapped outside the lower coil core 1-2. The right side of the upper coil core 1-7 with a width of 15 is embedded in the groove with a width of 15 of the upper framework 1-8, and the two are fixed by epoxy resin. The right side of the upper coil core 1-7 with a width of 15 is embedded in the groove with a width of 15 of the lower framework 1-5, and the two are fixed by epoxy resin. The circular arc surface of the lower framework 1-5 is consistent with the circular arc surface of the adjusting block 1-3, the circular arc surface of the adjusting block 1-3 can rotate around the circular arc surface of the lower framework 1-5, and after the directions of the upper coil 1-6 and the lower coil 1-1 are determined, the two are fastened by the adjusting fastening screw 1-4. The right side of the lower coil core 1-2 with a width of 15 is embedded in the groove with a width of 15 of the adjusting block 1-3, and the two are fixed by epoxy resin.

[0051] In the above embodiment of the application, the upper coil core and the lower coil core are made of 1J50 ferrous nickel soft magnetic alloy and processed into I-shaped cores, which have the characteristics of high magnetic permeability, high saturation magnetic induction intensity, and low magnetic hysteresis loss, can reduce the size of the coil core, and ensure sufficient space for internal filling.

[0052] The core material is subjected to the following heat treatment process: heating to 1150℃ for 5 hours, cooling to 600℃ at 100℃ / hour, and cooling to 300℃ or below at ≥400℃ / hour to ensure that it obtains the best magnetic properties and mechanical properties.

[0053] In the above embodiment of the application, the upper framework and the lower framework are integrally solidified after being hot-pressed from modified epoxy dicyandiamide (acyl ether), which has high mechanical strength and dielectric properties, good dimensional stability, heat resistance, moisture resistance, and impact resistance.

[0054] In the above embodiment of the application, after the upper coil and the lower coil are wound, they are wrapped with shielding copper foil, then lead wires are drawn out, glass cloth adhesive tape is wound around the outer edge of the shielding copper foil, and vacuum impregnation treatment is performed by using epoxy insulating paint.

[0055] The coil assembly is installed on one side of the electrode assembly in the cavity of the shell and is electrically connected with the water-tight connector; a magnetic field is generated by the coil assembly, the electrode is exposed to seawater, the seawater moves relative to the ship, cuts the magnetic induction lines, and generates a signal in linear proportion to the relative water flow velocity, so that the speed of the ship is detected.

[0056] Specifically, the electrode assembly 35 is divided into an electrode assembly one and an electrode assembly two, as shown in the figure. Figure 7 The electrode one is arranged on the outer side surface of the electrode plate one and adopts a conformal design, and the outer surfaces of the electrode one and the electrode plate one are consistent; the electrode two is arranged on the outer side surface of the electrode plate two and adopts a conformal design, and the outer surfaces of the electrode two and the electrode plate two are consistent. The welding piece one is arranged on the inner side surface of the electrode plate one at a position corresponding to the electrode one, and the welding piece one is pressed by screwing the nut one 2-4 into the threads at the rear of the electrode one and is sealed by epoxy resin; the electrode lead one is electrically connected with the welding piece one by an electric welding process, and the other end is electrically connected with the water-tight connector two 8; the welding piece two is arranged on the inner side surface of the electrode plate two at a position corresponding to the electrode two, and the welding piece two is pressed by screwing the nut two 2-4 into the threads at the rear of the electrode two and is sealed by epoxy resin; the electrode lead two is electrically connected with the welding piece two by an electric welding process, and the other end is electrically connected with the water-tight connector two 8.

[0057] Specifically, because the magnetic field strength decreases with the increase of the distance between the electrode surface and the excitation coil, the distance between the electrode one and the electrode two and the coil assembly 34 is required to be as close as possible in the design.

[0058] Specifically, the fluid simulation technology is used to simulate and optimize the shape of the shell of the electromagnetic speed measurement assembly. The final design result is verified by a water tunnel test, and finally a wing-shaped shape is adopted, which can greatly reduce the influence of water flow disturbance near the electromagnetic speed measurement assembly on the flow velocity signal, improve the speed measurement stability, and at the same time improve the cavitation critical speed, so as to realize stable speed measurement at high speed.

[0059] Specifically, the electromagnetic speed measurement assembly adopts an epoxy resin bonding and pouring process, has high bonding strength, and the electrode assembly, the coil assembly, and the shell are poured with epoxy resin and formed into a rigid body after high-temperature curing, so the mechanical strength is very high.

[0060] The problem of whether the combination of the shell and the epoxy resin glue is tight and reliable is particularly crucial in the pouring part, so the machining quality and surface treatment process of the shell are extremely important. The shell should be considered comprehensively in design to avoid sharp corners and edges as much as possible. Because the linear expansion coefficient of the epoxy resin glue is much larger than that of the metal material, when the metal material is poured, the thermal stress caused by temperature change should be considered. It is this thermal stress and the shrinkage stress generated during the curing of the resin that together form the internal stress of the cured product, and this internal stress often concentrates at the sharp corners of the metal material, especially after the curing reaction is completed, if the temperature is lowered too quickly, this stress will cause the cured product to crack, delaminate and debond. Therefore, the sharp corners and edges of the shell are rounded into R angles, which not only improves the adhesion of the epoxy resin glue to the shell, but also prevents stress concentration caused by sharp corners and edges of the shell.

[0061] 600 kHz phased array transducer array has nearly a thousand independent transducer elements (as shown in Figure 10 The spacing between the transducers is 1.25 mm (according to the sound speed C=1500 meters / second), and the parallel form between the transducer elements is connected in the manner shown in Figure 11 The front radiation surface of the phased array is the common negative electrode, X-type leads are used, and finally 8 transducer subarrays X1, X2, X3, X4, Y1, Y2, Y3, Y4 are formed.

[0062] Transducer array and parameter requirements:

[0063] 1) Transducer array material: 1-3 composite material

[0064] 2) Effective diameter of ceramic: 100±5 mm

[0065] 3) The distance between each adjacent transducer is 1.25 mm

[0066] 4) The front radiation surface of the phased array is the common negative electrode.

[0067] 5) The back radiation surface of the phased array is connected as shown in Figure 11 X-type leads are used, and finally 8 transducer arrays X1, X2, X3, X4, Y1, Y2, Y3, Y4 are formed.

[0068] 6) Natural horizontal / vertical directivity opening angle of the base array: θ≤2.5°;

[0069] 7) Side lobe under the condition of natural directivity of the base array: δ≤-15dB;

[0070] 8) Maximum transmitting voltage response level under the condition of natural directivity of the base array: Sv≥185dB;

[0071] 9) Maximum transmitting sound source level in the condition of natural directivity of the array: ≥ 230 dB.

[0072] The input impedance and output impedance of the back-end processing circuit are both 50Ω, while the impedance of the phased array transducer is non-standard. In order to realize impedance matching, an impedance matching board is needed to realize impedance transformation. The impedance matching board is composed of four RM8 transformers, which realizes impedance transformation between the phased array transducer and the back-end processing circuit.

[0073] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0074] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0075] Although the embodiments and drawings of the present application are disclosed for the purpose of illustration, those skilled in the art can understand that various alternatives, changes and modifications are possible without departing from the spirit and scope of the present application and the appended claims, therefore, the scope of the present application is not limited to the content disclosed in the embodiments and drawings.

Claims

1. A composite sensor suitable for high-speed ship speed measurement, characterized by: The composite sensor is an integrated columnar structure; it includes a phased array transducer, an electronic compartment, an electromagnetic speed measurement component, a rod body, a handle, a watertight connector mounting block, a first watertight connector, a second watertight connector, a phased array cable, an electromagnetic speed measurement cable, an impedance matching plate, and a locking block; The phased array transducer is located at the bottom of the sensor, and its lower end is covered with a layer of vulcanized rubber using a vulcanization process to form a streamlined surface; the electronic cabin is installed on the upper end of the phased array transducer in a sealed contact manner; the lower end of the electronic cabin is open to form an internal cavity, the impedance matching board is installed in the internal cavity of the electronic cabin, and the lower end of the phased array cable is electrically connected to the impedance matching board; the electromagnetic speed measuring component is installed on the upper end of the electronic cabin in a sealed contact manner; the upper end of the electromagnetic speed measuring component is inserted and positioned with the lower end of the rod body, and is sealed and fixedly connected; the upper end of the rod body is an externally threaded cylinder, and the handle is mounted on the outer cylinder in a lower limit manner. A threaded cylinder is provided, and a locking block is screwed into the external threaded cylinder to fix the handle; an external connection hole is provided on the handle, which is fixedly connected to a fixing frame or a liftable bracket at the lower end of the hull through the external connection hole, so that the composite sensor is extended into the water below the hull; the connector mounting block is fixed to the upper end of the handle; watertight connector 1 and watertight connector 2 are installed on the left and right sides of the upper end of the connector mounting block; the lower end of the electromagnetic speed measuring cable is electrically connected to the electromagnetic speed measuring assembly, and the upper ends of the two cables are respectively connected to watertight connector 1 and watertight connector 2; the middle part of the shell of the electromagnetic speed measuring assembly adopts a column structure with a wing-shaped cross-section.

2. The composite sensor suitable for high-speed ship speed measurement according to claim 1, characterized in that: The phased array transducer is a planar array made of 1-3 type piezoelectric composite ceramic material, the spacing between adjacent transducer elements is 1.25mm, the effective diameter of the piezoelectric ceramic phase is 100±2mm, and the resonant frequency is 600kHz.

3. The composite sensor suitable for high-speed ship speed measurement according to claim 1, characterized in that: The impedance matching board is composed of a transformer, an inductor, and a resistor, and includes four impedance conversion channels to achieve the functions of tuning and impedance conversion.

4. The composite sensor suitable for high-speed ship speed measurement according to claim 1, characterized in that: The electromagnetic speed measuring assembly includes a splitter, the shell, a guide rod, a coil assembly, and an electrode assembly; the splitter is fixed to the upper end of the shell; a rectangular through hole is opened in the middle part of the shell, and a waist-shaped hole is opened at the center axis of the shell at the upper end of the rectangular through hole. Both ends of the guide rod are waist-shaped shafts, one end of which is inserted into the waist-shaped hole of the shell and fastened and sealed by bonding; the coil assembly and the other end of the guide rod are fastened and sealed by bonding.

5. The composite sensor suitable for high-speed ship speed measurement according to claim 4, characterized in that: A wiring hole is provided inside the shell of the electromagnetic speed measurement component, and the phased array cable passes through the wiring hole and is physically and electromagnetically isolated from the coil component of the electromagnetic speed measurement component; the phased array cable and the electromagnetic speed measurement cable respectively pass through two isolated wiring channels in the splitter, and the phased array cable and the electromagnetic speed measurement cable are respectively provided with a metal wire mesh shielding tube in the rod body.

6. The composite sensor suitable for high-speed ship speed measurement according to claim 4, characterized in that: The electrode plates of the electrode assembly adopt a conformal design structure with the airfoil-like shape of the shell.

7. The composite sensor suitable for high-speed ship speed measurement according to claim 6, characterized in that: The electrodes of the electrode assembly adopt a conformal design structure with the corresponding electrode plates.

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