Water-gas medium probe system for water tunnel environment

Abstract

The invention relates to a water vapor medium probe system for a water tunnel environment. The water vapor medium probe system comprises a probe device which is arranged in a water tunnel environment, comprises double probes with two hard alloy needles, and is used for at least performing flow field measurement on water vapor medium types in the water tunnel environment; the clamping and fixing device is mounted on the side wall of the water tunnel environment providing device and is used for clamping the probe device and adjusting the position of the probe device so as to perform flow field measurement on any sampling point in the whole watershed; a sealed channel isolated from a water tunnel environment is provided for at least accommodating a wire electrically connected with the probe device; and the synchronous measurement equipment group is electrically connected with the probe device through a wire and is used for controlling multiple sensors including the probe device based on the trigger signal so as to realize synchronous measurement. The device has the advantages of high precision, high response frequency, strong mechanical strength, good water tightness, synchronous measurement and low cost.

Description

Technical Field

[0001] The present application relates to the field of marine technology, and in particular to a water-air medium probe system for use in a water tunnel environment. Background Art

[0002] In the research on underwater vehicles, prototype tests of underwater vehicles are too expensive, and many data in prototype tests are difficult to measure accurately, so model tests need to be carried out in the laboratory. Such tests usually require stable and controllable flow field conditions, so they are generally carried out in water tunnels. Among them, underwater vehicles usually include both underwater submarines and underwater weapons, so strengthening the research on the fluid dynamics of underwater vehicles plays a very important role.

[0003] Water tunnel tests (usually used to simulate and study fluid dynamics phenomena) have high requirements for the accuracy and reliability of measurement tools, especially in complex water quality and high flow rate environments. Traditional flow field measurement tools often have slow response, low accuracy, or cannot withstand complex flow field conditions. With the deepening of fluid dynamics research, test requirements are getting higher and higher, especially when it is necessary to measure the types of media such as gas and liquid in water. Existing detection equipment may fail under certain extreme conditions or cannot meet the requirements of fast response and high intensity. Therefore, it is particularly important to design a probe system with high precision, high response frequency, strong mechanical strength and good water tightness.

[0004] In addition, water tunnel tests often need to be conducted under high flow rates and deep water conditions, which requires the measurement equipment to be able to operate stably in these environments and have sufficient durability to be used for a long time without being damaged by environmental changes. Therefore, designing a low-cost, mass-producible probe system can greatly reduce the cost of the test and provide a feasible experimental solution for more research teams. Summary of the invention

[0005] In view of this, an embodiment of the present application provides a water-gas medium probe system for a water tunnel environment to solve at least one problem existing in the background technology.

[0006] The present application provides a water-air medium probe system for a water tunnel environment, the water-air medium probe system comprising:

[0007] A probe device is provided in the water tunnel environment, comprising a dual probe having two carbide needles, for performing flow field measurement of at least water and gas medium types in the water tunnel environment;

[0008] A clamping and fixing device is installed on the side wall of the water tunnel environment providing device, and is used to clamp the probe device and adjust the position of the probe device in the water tunnel environment to measure the flow field at any preset sampling point in the entire flow basin of the water tunnel environment; and provide a sealed channel isolated from the water tunnel environment to at least accommodate a wire electrically connected to the probe device; wherein the connection between the clamping and fixing device and the side wall is a sealed connection; and

[0009] The synchronous measurement equipment group is electrically connected to the probe device through the wire, and is used to control multiple sensors including the probe device based on the trigger signal to achieve synchronous measurement.

[0010] In an optional embodiment, the probe device comprises:

[0011] Two carbide needles;

[0012] A multi-core wire, comprising two very fine wires; the two very fine wires are respectively connected to the two hard alloy needles in a one-to-one correspondence and the connection is sealed; and

[0013] The hollow needle body comprises a hollow part and a side groove; the connection between the ultra-fine wire and the carbide needle is disposed in the hollow part, and the carbide needle and the hollow needle body are sealed and fixed; the side groove is connected to the sealing channel to allow the multi-core wire to pass into the sealing channel.

[0014] In an optional embodiment, the distance between the tips of the two cemented carbide needles is greater than 0 and lower than a spacing threshold to form an extremely narrow spacing.

[0015] In an optional embodiment, the clamping and fixing device includes:

[0016] A hollow crossbar, one end of which is connected to a preset connection area of ​​the hollow needle body of the probe device and fixed by a hard connection; the other end of which is sealed and connected to a side wall plate of the water tunnel environment providing device by a sealing connection device and penetrates the side wall plate; and

[0017] The sealing connection device is sleeved on the hollow cross bar to enable the hollow cross bar to rotate around the axis; and fixes and seals the connection between the hollow cross bar and the side wall plate.

[0018] In an optional embodiment, the sealing connection device includes:

[0019] A step seal is sleeved on the hollow cross bar so that the hollow cross bar can rotate around its own rotation axis and translate forward and backward in the step seal;

[0020] An aluminum retaining ring is sleeved on the hollow cross bar and arranged between the step seal and the secondary sealing plate;

[0021] A secondary sealing plate, fixed to the side wall plate by screws, and pressing the step seal by the aluminum retaining ring to seal;

[0022] A lower half block is fixed to the side wall plate by screws, and the hollow cross bar passes through the lower half block;

[0023] an upper half block, matched with the lower half block to clamp and fix the hollow cross bar; and

[0024] The bearing shell is placed at the position where the lower half block and the upper half block clamp the hollow cross bar.

[0025] In an optional embodiment, a first through hole is opened in the middle of the secondary sealing plate for allowing the hollow cross bar to pass through.

[0026] In an optional embodiment, a third through hole is opened in the middle of the main body of the lower half block for the hollow cross bar to pass through;

[0027] The main body of the lower half block is provided with a protrusion, and the protrusion is provided with a first groove whose shape is consistent with the first semicircular edge contour of the third through hole, so that the lower semicircular edge contour of the third through hole extends outward along the first groove.

[0028] In an optional embodiment, a second groove having a shape consistent with the second semicircular edge contour of the third through hole is formed on the upper half block, so that the second semicircular edge contour of the third through hole extends outwardly along the second groove.

[0029] In an optional embodiment, the synchronous measurement equipment group includes a multi-channel synchronous trigger, a signal acquisition card, and at least one of the following: a pressure sensor; a high-speed camera;

[0030] The multi-channel synchronous trigger is used to generate and output the trigger signal;

[0031] The probe device, the pressure sensor and / or the high-speed camera are used to perform synchronous measurement under the control of the trigger signal;

[0032] The response speed of the signal acquisition card exceeds a response speed threshold, and is used to acquire the flow field information measured by the probe device for recording and / or display.

[0033] In an optional implementation manner, the synchronous measurement equipment group further includes:

[0034] A high-frequency AC power supply, used to output a high-frequency AC signal as an excitation signal to the probe device; and

[0035] The signal processing circuit is used to at least rectify and filter the high-frequency signal containing the flow field information output by the probe device to obtain a measurement signal containing the flow field information that is convenient for the signal acquisition card to collect.

[0036] The beneficial effects brought by the technical solution provided by the embodiment of the present application include: the probe system of the embodiment of the present application is a high-intensity, low-cost, fast-response watertight probe synchronous measurement system that can be used for water tunnel tests, which can accurately measure the type of water and gas media at any sampling point in the water tunnel flow field, has high precision, high response frequency, strong mechanical strength and good water tightness, can be synchronized with pressure sensors and high-speed cameras, and has low cost. The probe system of the embodiment of the present application can provide a reliable and accurate flow field measurement tool for water tunnel tests, and promote experimental research and technological development in related fields.

[0037] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below and in part will become apparent from the description below or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0039] Figure 1 This is a structural schematic diagram of a specific example of a water-air medium probe system for a water tunnel environment in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of a specific example of a probe device in an embodiment of the present application;

[0041] Figure 3 This is a structural schematic diagram of a specific example of a clamping and fixing device in an embodiment of the present application;

[0042] Figure 4 for Figure 3 A front view of the middle clamping fixture;

[0043] Figure 5 for Figure 3 A right side view of the middle clamping fixture;

[0044] Figure 6 for Figure 3 Left side view of the center clamping fixture;

[0045] Figure 7This is a structural schematic diagram of a specific example of a hollow cross bar in an embodiment of the present application;

[0046] Figure 8 This is a structural schematic diagram of a specific example of an aluminum retaining ring in an embodiment of the present application;

[0047] Fig. 9 This is a structural schematic diagram of a specific example of a secondary sealing plate in an embodiment of the present application;

[0048] Fig.10 A schematic structural diagram of a specific example of a lower Hough block in an embodiment of the present application;

[0049] Fig.11 A schematic structural diagram of a specific example of an upper Hough block in an embodiment of the present application;

[0050] Fig.12 A schematic structural diagram of a specific example of a bearing bush in an embodiment of the present application;

[0051] Fig.13 It is a structural schematic diagram of a specific example of the outer side of the side wall plate in the embodiment of the present application;

[0052] Fig.14 This is a structural schematic diagram of a specific example of the inner side of the side wall plate in the embodiment of the present application;

[0053] Fig.15 A waveform diagram of a specific example of measurement data obtained by the probe device when the medium type at the probe tip is gas in the embodiment of the present application;

[0054] Fig.16 A waveform diagram of a specific example of measurement data obtained by the probe device when the medium at the probe tip is water in the embodiment of the present application;

[0055] Fig.17 A waveform diagram of a specific example of measurement data obtained by the probe device when the probe enters water from air and then leaves water in an embodiment of the present application;

[0056] Fig.18 It is a waveform diagram of a specific example of measurement data obtained by the probe device when the probe repeatedly enters and exits water and air in an embodiment of the present application.

[0057] Reference numerals:

[0058] 1. Water tunnel; 2. Test model and pressure sensor; 3. Probe device; 4. Clamping device; 5. High-frequency AC power supply; 6. Multi-channel synchronous trigger; 7. Variable resistor; 8. Signal amplifier; 9. Signal filter; 10. Signal acquisition card; 11. Measurement terminal; 12. Display terminal; 13. High-speed camera; 14. Power supply;

[0059] 301, carbide needle; 302, hollow needle body; 303, ultra-fine wire; 304, multi-core wire; 305, heat-sealed tube; 306, structural sealant; 307, UV glue; 308, insulating paint;

[0060] 401, hollow cross bar; 402, step seal; 403, aluminum retaining ring; 404, secondary sealing plate; 405, lower half block; 406, upper half block; 407, bearing; 408, first O-ring; 409, side wall plate; 410, screw; 4011, gap; 4041, first through hole; 4042, second through hole; 4051, third through hole; 4052, fifth through hole; 4053, fourth through hole; 4054, bump; 4055, first groove; 4056, support member; 4061, second groove; 4062, sixth through hole. DETAILED DESCRIPTION

[0061] In order to make the technical solutions and beneficial effects of the present application more obvious and easy to understand, the following is a detailed description by listing specific embodiments. The drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which the present application belongs.

[0062] The embodiments of the present application are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present application. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, in a certain embodiment, the solution after removing some steps can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementations in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementations of other embodiments.

[0063] In each embodiment of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

[0064] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0065] In the embodiments of the present application, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun after the article may be understood as a singular expression or a plural expression.

[0066] In the embodiments of the present application, "plurality" refers to two or more.

[0067] In some embodiments, the terms "at least one", "one or more", "a plurality of", "multiple", etc. can be used interchangeably.

[0068] The prefixes such as "first" and "second" in the embodiments of the present application are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, value or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute unnecessary restrictions due to the use of prefixes. For example, the numerical value of the description object is not limited by the ordinal number, and can be one or more. Take "first device" as an example, where the numerical value of "device" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different.

[0069] In some embodiments, the term "connection" may indicate that an electrical signal or data is transmitted between a connected end and a connected end, and may be understood as "electrical connection", "communication connection", etc. "Connection" may be a direct connection between two components, an indirect connection established through other components, internal communication between two components, or any other possible connection form.

[0070] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", "above", and "exceed" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0071] In some embodiments, the values ​​defined by high and low, respectively, may be relative values, rather than absolute values, such as high frequency and low frequency, high pressure and low pressure, and so on.

[0072] This specification provides method operation steps such as embodiments or flow charts, but may include more or fewer operation steps based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device, system or server product is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0073] Before introducing the technical solution of this application, the following first describes the relevant knowledge involved in the technical solution of this application:

[0074] Water tunnel: refers to a device for hydrodynamic experiments, which can be used to study phenomena such as boundary layer, wake, turbulence, cavitation, hydroelasticity, and the forces between water flow and test objects. A water tunnel is a water circulation system in which the flow rate and pressure can be controlled separately. The cross-section of the test section of a water tunnel can be circular, square, or rectangular. There are observation windows (walls) on the top, bottom, front, and back of the water tunnel, and the wires of the measuring instruments need to pass through the wall, so this needs to be sealed.

[0075] Water-gas medium: refers to a mixed medium composed of water and gas (such as air). In fluid mechanics and experiments, water-gas medium usually refers to the state of water containing bubbles or gas components. This medium appears in the water tunnel test of bubble flow or bubble medium. The role of the probe is to accurately measure the types of these media in the water tunnel flow field.

[0076] Tungsten steel needle: refers to a hard alloy material mainly composed of tungsten (W) and carbon (C). This hard alloy material is usually called cemented carbide or tungsten alloy. It is a very hard and wear-resistant metal material, widely used in fields that require high hardness and corrosion resistance. Tungsten steel needle can be a needle-shaped object made of this material.

[0077] UV curing glue (UV glue for short): an adhesive that cures by ultraviolet (UV) light. It usually consists of two parts: a resin matrix and a photoinitiator. Under ultraviolet light, the photoinitiator absorbs light energy and initiates a polymerization reaction in the resin matrix, causing the glue to quickly cure into a solid. UV glue is widely used in electronic products, optical equipment, automobiles, medical equipment and other fields, especially in environments that require fast, high precision and pollution-free, such as display and lens bonding.

[0078] Structural Sealant: An adhesive specifically designed to provide high-strength bonding and sealing properties, commonly used in the fields of construction, automobiles, aerospace, etc., especially in applications that need to withstand mechanical loads, pressure and temperature changes. Structural sealants can not only effectively seal joints or holes, but also ensure the stability and durability of the structure while providing bonding strength.

[0079] Signal acquisition card (abbreviated as acquisition card, Data Acquisition Card): is a hardware device that is mainly used to collect analog signals from external sensors or measuring instruments and convert them into digital signals for computer processing. It has high precision and high sampling rate, and can collect, store and analyze data in real time. The acquisition card supports a variety of signal types, such as voltage, temperature and pressure, and is widely used in industrial automation, laboratory testing, medical instruments and environmental monitoring. Its main function is to convert external signals into digital data, and monitor, process and control them in real time through a computer.

[0080] Heat-sealed tube: It is a tubular material made of thermoplastics (such as polyethylene, polypropylene, etc.). After heating, the ends can be fused and sealed. It is widely used in packaging, electronic protection, medical packaging and other fields. The main feature of heat-sealed tube is that it can melt quickly during heating and form a solid seal, which can isolate air, moisture and pollutants. In the probe system, heat-sealed tubes may be used to seal the connection parts of sensitive components to ensure water tightness and mechanical strength, thereby ensuring the stable operation of the system under high flow rate, high back pressure and complex water quality environment.

[0081] O-ring (O-ring for short): a rubber seal with a circular cross section (or O-shaped). It is cheap, easy to manufacture, reliable, and has simple installation requirements. It can withstand pressures of tens of megapascals. O-rings can be used in static applications, as well as in dynamic applications where there is relative motion between components, such as the shaft of a rotary pump and the piston of a hydraulic cylinder.

[0082] Step seal: It is generally composed of a rubber O-ring and a polytetrafluoroethylene ring. The O-ring is a force-applying element that provides sufficient sealing force and compensates for the polytetrafluoroethylene ring. It is suitable for sealing hydraulic cylinder piston rods, etc. Step seals are single-acting seals and can be divided into piston step seals and piston rod step seals. Step seals have the advantages of low friction, no creeping, low starting force, high pressure resistance, and simple groove structure.

[0083] Half structure: refers to a fixed structure that uses two semicircular "half blocks" to clamp the pipe. The two semicircles are actually a little short of a complete semicircle. When they are fully assembled, they produce a large squeezing force on the side of the pipe, which can clamp the pipe but will not deform the pipe.

[0084] Bushing: refers to the part where the sliding bearing and the journal contact. It is a semi-cylindrical surface in the shape of a tile. It is very smooth and is generally made of wear-resistant materials such as bronze and anti-friction alloys. In special cases, it can be made of wood, engineering plastics or rubber. Bushings can be integral or split. Integral bushings are usually called bushings. Integral bushings can have or without oil grooves. The bushing and the journal are clearance-fitted and generally do not rotate with the shaft. In short, bushings refer to two copper sheets that are approximately equal to a semicircle.

[0085] In the process of implementing this application, the inventors found that the probe system or bubble flow measurement system in the related art has at least one of the following problems:

[0086] There is no matching part that is combined with the water tunnel test device, and it cannot be directly installed in the water tunnel for use. The water tunnel test has a unique test environment that is completely different from the chemical production process, gas-liquid chemical reaction process, etc., so it cannot be used for water tunnel testing;

[0087] There is no relevant device for fixing, clamping and adjusting the spatial position of the probe, or the device for fixing, clamping and adjusting the spatial position of the probe can only measure the sampling points on a certain line, so there is no way to measure any sampling point in the entire flow field through simple adjustment;

[0088] The application requirements of synchronous measurement are not taken into consideration, and the synchronous measurement capability is not available;

[0089] There is no mention of the spatial resolution of the medium type, or the spatial resolution of the medium type is between 1-2mm, and the gas / liquid phase particles below 1mm cannot be measured; there is no special design for the design strength of the probe, the design cost of the system, the response speed of signal acquisition, water tightness, etc., so that it can be applied to water tunnel test environments with high flow rate, large water depth, poor water quality, etc.; for example, the diameter of the probe needle body is only about 0.1mm to 0.2mm, and the strength is relatively low; most of them are non-standard customized parts with high production cost and cannot be mass-produced; in the test environment of the water tunnel, the flow rate may reach tens of meters per second, and there are relatively high requirements for the response speed of signal acquisition.

[0090] To this end, an embodiment of the present application provides a water-gas medium probe system for a water tunnel environment. The system can be used in environments including water tunnels with "fast flow rate, complex water quality, multiple working conditions, water tightness, and synchronous measurement", and can accurately measure the types of water-gas media at any sampling point in the entire river basin in the water tunnel environment. Figure 1 A schematic structural diagram of a specific example of a water-air medium probe system for a water tunnel environment in an embodiment of the present application is shown. As shown in the figure, the water-air medium probe system for a water tunnel environment includes:

[0091] The probe device 3 is arranged in the water tunnel environment, and comprises a dual probe with two carbide needles, and is used to perform flow field measurement of at least water and gas medium types in the water tunnel environment;

[0092] A clamping and fixing device 4 is installed on the side wall of the water tunnel environment providing device, and is used to clamp the probe device 3 and adjust the position of the probe device 3 in the water tunnel environment to measure the flow field at any preset sampling point in the entire flow basin in the water tunnel environment; and provide a sealed channel isolated from the water tunnel environment to at least accommodate a wire electrically connected to the probe device 3; wherein the connection between the clamping and fixing device 4 and the side wall is a sealed connection; and

[0093] The synchronous measurement equipment group is electrically connected to the probe device 3 through the wire, and is used to control multiple sensors including the probe device 3 based on the trigger signal to achieve synchronous measurement.

[0094] In the embodiment of the present application, the water tunnel environment may be an underwater environment in which the flow rate and pressure, etc. can be controlled separately, which can be provided by a water tunnel or equipment similar to a water tunnel.

[0095] The water hole environment providing device may be a water hole, but is not limited thereto, and may be other devices capable of providing a water hole environment.

[0096] The carbide needle (or probe) may be a needle-shaped object mainly made of carbide material, for example, a tungsten steel needle or the like.

[0097] The flow field measurement can obtain at least one of the following: water gas medium type; bubble velocity; bubble size; bubble density; or others, which can be set according to actual needs.

[0098] The sealed channel provided by the clamping and fixing device 4 can not only accommodate the wires electrically connected to the probe device 3, but also be used to accommodate other components or gas according to actual needs.

[0099] Thus, firstly, by adopting the dual probe of carbide needle, it can conduct electricity locally well in the environment of "fast flow rate and mixed water quality" and is not easy to wear, thus reducing the loss and cost, and can improve the spatial resolution of water-gas medium types. Moreover, compared with the single probe, the dual probe can avoid the problem that the probe tip is in the water but still disconnected from the other electrode due to the discontinuity of water-gas in the process of intense water-gas mixing. At this time, the single probe will judge the liquid droplets that are not connected with the surrounding liquid as gas, and cannot measure the liquid droplets that are not connected with the surrounding liquid;

[0100] Second, by fixing it on the side wall through the clamping fixture, a matching part combined with the water tunnel test device can be provided, which can be used for water tunnel tests; by arbitrarily adjusting the position of the probe device in the water tunnel environment, accurate measurement of any point in the flow field inside the water tunnel environment, including the types of water and gas media, can be achieved, and the flow field measurement of "multiple working conditions" in the entire basin can be achieved; through the sealed connection between the clamping fixture and the side wall and the sealed channel, it has good "water tightness" to ensure the isolation of the water tunnel from the external environment;

[0101] Third, by synchronizing the measurement equipment group, under the control of the trigger signal, multiple sensors including the probe device (such as pressure sensors, high-speed cameras, etc.) can be synchronized for measurement, which can improve the measurement efficiency and ensure the response speed.

[0102] Therefore, the probe system of the embodiment of the present application is a high-intensity, low-cost, fast-response watertight probe synchronous measurement system that can be used for water tunnel tests. It can accurately measure the type of water and gas media at any sampling point in the water tunnel flow field, has high precision, high response frequency, strong mechanical strength and good water tightness, and can achieve synchronous measurement with pressure sensors and high-speed cameras, etc., and has low cost. The probe system of the embodiment of the present application can provide a reliable and accurate flow field measurement tool for water tunnel tests, and promote experimental research and technological development in related fields.

[0103] Figure 2 A schematic structural diagram of a specific example of a probe device in an embodiment of the present application is shown. As shown in the figure, in an optional implementation manner, the probe device 3 includes:

[0104] Two 301 carbide needles;

[0105] The multi-core wire 304 includes two very fine wires 303; the two very fine wires 303 are respectively connected to the two hard alloy needles 301 in a one-to-one correspondence and the connection is sealed; and

[0106] The hollow needle body 302 includes a hollow portion and a side groove; the connection between the ultra-fine wire 303 and the carbide needle 301 is located in the hollow portion, and the carbide needle 301 and the hollow needle body 302 are sealed and fixed; the side groove is connected to the sealing channel to allow the multi-core wire 304 to pass into the sealing channel.

[0107] In an exemplary embodiment, the hollow needle body 302 can be formed by a hollow stainless steel tube with side grooves. The hollowness is to facilitate fixing the carbide needle 301 (such as HRA55 extra-hard tungsten steel needle) and passing the wire; the side groove is to facilitate passing the wire connected to the carbide needle 301 out of the probe device 3 and connecting it to the external circuit outside the water tunnel (such as a synchronous measurement equipment group) through the clamping fixture 4.

[0108] The hard alloy needle 301 may be a 0.5 mm diameter extra-hard tungsten steel needle to improve the design strength, but is not limited thereto. The surface of the extra-hard tungsten steel needle may be treated with insulation, for example, it may be coated with insulating paint 308 (such as melamine alkyd resin insulating paint).

[0109] The main body of the multi-core wire 304 can be a multi-core ultra-fine wire with a fixed outer diameter, for example, a double-core ultra-fine wire with an outer diameter of Φ2mm, which has the ability to pass through the hollow part of the hollow needle body 302 and the sealing channel of the clamping and fixing device 4, and can also cooperate with the O-ring in the clamping and fixing device 4 to achieve a watertight effect.

[0110] The ultra-thin wire 303 included in the multi-core wire 304 may be a Teflon silver-plated ultra-thin wire, but is not limited thereto.

[0111] The connection between the ultra-fine wire 303 and the carbide needle 301 can be sealed by a heat-sealing tube 305 (such as a PET heat shrink tube). The connection between each ultra-fine wire 303 and each carbide needle 301 is sealed independently, or other sealing methods can be selected according to actual needs.

[0112] The two carbide needles 301 and the hollow needle body 302 can be fixed and insulated with UV glue 307 (such as highly transparent UV epoxy resin), with only a very short needle tip portion exposed, and can be sealed with structural sealant 306 (such as neutral organic silicone structural sealant or other silicone); and the structural sealant 306 can also be used inside the hollow needle body 302 to seal and fix the connection between the very fine wire 303 and the carbide needle 301. Then, the needle, the needle body and the wire are fixed and sealed by a combination of UV glue and silicone, which improves water tightness.

[0113] In this way, through the specific structure of the probe device, such as using a super hard tungsten steel needle and a hollow stainless steel tube, and by designing the relatively fragile wires and connecting parts to be hidden in the hollow needle body (such as a stainless steel tube), the structural strength is improved, and it can adapt to high flow rates of tens of meters per second, deep water depths of tens of meters and relatively poor water quality environments.

[0114] In an optional implementation, the distance between the needle tips of the two cemented carbide needles 301 is greater than 0 and lower than a spacing threshold to form an extremely narrow spacing.

[0115] In the embodiment of the present application, the spacing threshold can be set according to actual needs, for example, it can be lower than 1 mm.

[0116] In this way, by using two conductive probes with a very narrow spacing, since the resistance of water is much smaller than that of air, the different media of water and air will form current paths with different resistance values ​​between the probes. Due to the narrow spacing between the probe tips, high-precision measurements can be achieved.

[0117] Figure 3 A schematic structural diagram of a specific example of a clamping and fixing device in an embodiment of the present application is shown. Figure 4 for Figure 3 Front view of the central clamping fixture, Figure 5 for Figure 3 Right side view of the center clamping fixture, Figure 6 for Figure 3 As shown in the figure, in an optional embodiment, the clamping and fixing device 4 includes:

[0118] A hollow crossbar 401, one end of which is connected to a preset connection area of ​​the hollow needle body 302 of the probe device 3 and fixed by a hard connection; the other end of which is sealed and connected to a side wall plate 409 of the water tunnel environment providing device by a sealing connection device and penetrates the side wall plate 409; and

[0119] The sealing connection device is sleeved on the hollow cross bar 401 to enable the hollow cross bar 401 to rotate around the axis; and fixes and seals the connection between the hollow cross bar 401 and the side wall plate 409.

[0120] In the embodiment of the present application, the hard connection method can be a connection through a screw hole, but is not limited thereto, in order to improve the structural strength. Figure 3 The purpose of the two screws 410 is to tighten the hollow cross bar 401 to clamp the probe.

[0121] Figure 7 A structural schematic diagram of a specific example of a hollow crossbar in an embodiment of the present application is shown. As shown in the figure, the hollow crossbar 401 is a hollow structure, and the wire can be introduced into the hollow crossbar 401 from the side groove of the hollow needle body 302 and led out of the water hole. The preset connection area of ​​the hollow needle body 302 can be an area range, so that the probe device 3 can slide up and down in the gap 4011 at one end of the hollow crossbar 401 connected thereto to translate the probe up and down.

[0122] In this way, the up and down translation of the probe is realized by connecting one end of the hollow cross bar 401 with the probe device 3, and the front and rear position adjustment and rotation of the probe as a whole are realized through the sealing connection device, thereby enabling accurate measurement of the type of water vapor medium at any point in the flow field inside the water tunnel, and the measurable spatial range is very wide.

[0123] In the embodiment of the present application, the sealing connection device can adopt various devices that can realize the forward and backward movement and rotation of the hollow cross bar 401, and fix and seal the connection between the hollow cross bar 401 and the side wall plate 409, which can be selected according to actual needs.

[0124] In an optional embodiment, the sealing connection device includes:

[0125] The step seal 402 is sleeved on the hollow cross bar 401, so that the hollow cross bar 401 can rotate around its own rotation axis and translate forward and backward in the step seal 402;

[0126] An aluminum retaining ring 403 is sleeved on the hollow cross bar 401 and is disposed between the step seal 402 and the secondary sealing plate 404;

[0127] The secondary sealing plate 404 is fixed to the side wall plate 409 by screws, and presses the step seal 402 through the aluminum retaining ring 403 to seal;

[0128] A lower half block 405 is fixed to the side wall plate 409 by screws, and the hollow cross bar 401 passes through the lower half block 405;

[0129] An upper half block 406, matched with the lower half block 405 to clamp and fix the hollow cross bar 401; and

[0130] The bearing bush 407 is cushioned at the position where the lower half block 405 and the upper half block 406 clamp the hollow cross bar 401.

[0131] In this way, through the Step seal, while ensuring water tightness, on the one hand, the hollow cross bar is allowed to rotate around its own rotation axis, which is convenient for adjusting the rotation angle of the probe; on the other hand, the hollow cross bar is allowed to translate back and forth in the Step seal, so that the probe measuring point can have three degrees of freedom in the water tunnel, and the measurement of any measuring point in the whole flow field can be achieved. The purpose of setting the aluminum retaining ring is to cover the Step seal and press the Step seal under the action of the secondary sealing plate to ensure water tightness. The purpose of setting the secondary sealing plate is to press the Step seal by pressing the aluminum retaining ring. Through the lower half block, the hollow cross bar can pass through the lower half block to play a positioning role, and at the same time, it can cooperate with the upper half block to fix the hollow cross bar. The upper half block can be covered on the hollow cross bar, connected to the lower half block by screws, and the cross bar is fixed by tightening the screws. The upper half block and the lower half block can better fix the hollow cross bar through the bearing.

[0132] Figure 8 A structural schematic diagram of a specific example of an aluminum retaining ring in an embodiment of the present application is shown. Fig.12The structure of the bearing bushing in the embodiment of the present application is shown in FIG. Figure 8 and Fig.12 The structure shown in can be set according to actual needs.

[0133] refer to Figure 1 The working section of the water tunnel can be composed of a hollow pipe with a rectangular cross-section, and the four sides of the pipe are inlaid with detachable acrylic plates to facilitate experimental observation. Fig.13 A structural schematic diagram of a specific example of the outer side of the side wall plate in an embodiment of the present application is shown. Fig.14 A schematic diagram of a specific example of the structure of the inner side of the side wall plate in the embodiment of the present application is shown. In the exemplary embodiment, the side wall plate of the water tunnel replaces the observation window on the side of the water tunnel and is fixed on the water tunnel, and the probe and the clamping fixture are all fixed on the side wall plate.

[0134] Fig. 9 A schematic structural diagram of a specific example of a secondary sealing plate in an embodiment of the present application is shown. As shown in the figure, a first through hole 4041 is provided in the middle of the secondary sealing plate 404 for passing the hollow cross bar 401. A second through hole 4042 is provided at the edge of the secondary sealing plate 404 for installing screws to fix it to the side wall plate 409.

[0135] Fig.10 A structural schematic diagram of a specific example of the lower half block in the embodiment of the present application is shown. As shown in the figure, a third through hole 4051 is provided in the middle of the main body of the lower half block 405 for passing the hollow cross bar 401. A fourth through hole 4053 is provided at the edge of the main body of the lower half block 405 for installing screws to fix with the side wall plate 409. A protrusion 4054 is provided on the main body of the lower half block 405, and a first groove 4055 having a shape consistent with the edge contour of the first semicircle (such as the lower semicircle) of the third through hole 4051 is provided on the protrusion 4054, so that the lower semicircle edge contour of the third through hole 4051 extends outward along the first groove 4055. A fifth through hole 4052 is provided on the protrusion 4054 for installing screws to fix with the upper half block 406. The main body of the lower half block 405 and the lower part of the protrusion 4054 are connected by a support member 4056 to improve the structural strength. The specific structure of the support member 4056 can be set according to actual needs, and is not limited to a triangular support frame structure. For example, the protrusion 4054 can be integrated with the lower half block 405, or can be separate.

[0136] Fig.11A schematic structural diagram of a specific example of an upper half block in an embodiment of the present application is shown. As shown in the figure, a second groove 4061 having a shape consistent with the edge contour of the second semicircle (such as the upper semicircle) of the third through hole 4051 is provided on the upper half block 406, so that the second semicircle edge contour of the third through hole 4051 extends outward along the second groove 4061. The first groove 4055 and the second groove 4061 match so that the hollow cross bar 401 can pass through and tighten the hollow cross bar 401. A sixth through hole 4062 is provided on the upper half block 406 for installing screws to fix with the lower half block 405.

[0137] In an exemplary embodiment, the sealing connection device further includes a first O-ring 408, which is arranged inside the hollow crossbar 401, for example, sleeved on the wire passing through the hollow crossbar 401, and plays the role of filling the gap between the wire and the hollow crossbar. In addition, a hollow screw that can pass the wire is screwed into the non-probe end (i.e., the other end) of the hollow crossbar to tighten the first O-ring and ensure water tightness.

[0138] In the embodiment of the present application, in the area of ​​"water tightness", the main purpose is to lead out the wire of the probe. The water tunnel itself has a background pressure of 2 atmospheres, so a series of seals for the wires are designed. The combined design of sealing step seals, O-rings, and glue improves the water tightness and ensures the isolation of the water tunnel from the external environment.

[0139] The needle body structure of the probe and the clamping and fixing device cannot be hidden, and all the connecting parts that must be exposed are designed as hard connections of screws and screw holes. The structure has high strength and can work normally in high flow rates of tens of meters per second, deep water depths of tens of meters and relatively poor water quality environments. It has strong adaptability to water tunnel working conditions.

[0140] Each component of the embodiment of the present application can be manufactured using industrial standard products, including tungsten steel needles, stainless steel tubes, hollow cross bars, heat shrink tubes, wires, fixing glue, etc., with low processing costs, supporting mass production, and having low manufacturing costs.

[0141] refer to Figure 1 In an optional embodiment, the synchronous measurement equipment group includes a multi-channel synchronous trigger 6, a signal acquisition card 10, and at least one of the following: a pressure sensor; a high-speed camera 13;

[0142] The multi-channel synchronous trigger 6 is used to generate and output the trigger signal;

[0143] The probe device 3, and the pressure sensor and / or the high-speed camera 13 are used to perform synchronous measurement under the control of the trigger signal;

[0144] The response speed of the signal acquisition card 10 exceeds a response speed threshold, and is used to acquire the flow field information measured by the probe device for recording and / or display.

[0145] In the embodiment of the present application, the pressure sensor can be arranged on the test model and the pressure sensor 2 to measure the pressure value in the water tunnel environment.

[0146] The response speed threshold can be set according to actual needs, so that the signal acquisition card 10 can be suitable for the flow rate of tens of meters per second that may be reached in the water tunnel environment, thereby improving the response speed and the measurement accuracy.

[0147] In this way, by releasing the trigger signal through the multi-channel synchronous trigger, the trigger signal can be added to the measurement data of the probe and pressure sensor, and the high-speed camera can be started to shoot synchronously, so that the probe, pressure sensor and high-speed camera can be measured synchronously. The electrical signal of the specified frequency can be collected by the signal acquisition card, for example, a collection card with an acquisition speed of 10000Hz can be used.

[0148] In an optional implementation manner, the synchronous measurement equipment group further includes:

[0149] A high-frequency AC power supply 5, used for outputting a high-frequency AC signal as an excitation signal to the probe device 3; and

[0150] The signal processing circuit is used to at least rectify and filter the high-frequency signal containing the flow field information output by the probe device 3 to obtain a measurement signal containing the flow field information that is convenient for the signal acquisition card to collect.

[0151] In the embodiment of the present application, the high-frequency AC power source 5 can generate and provide a high-frequency AC signal of a preset specific frequency. In some examples, the high-frequency AC power source 5 can be a high-frequency AC low-voltage power source.

[0152] Since the probe device 3 is powered by direct current, in relatively poor water quality conditions, when the electrolyte content is high, it is very easy to produce the electrode interface polarization effect in the water after power is turned on, and the two probes form fixed anodes and cathodes, and the electrolysis reaction of water continues to occur at the needle tip, continuously generating hydrogen and oxygen gas, and while generating gas, interference signals are generated in the circuit due to the electrolysis reaction, which greatly affects the measurement accuracy. And for the probe needle tips that are very close to each other, this effect is more significant.

[0153] Therefore, the embodiment of the present application adopts the high-frequency AC signal output by the high-frequency AC power supply 5 to power the probe device 3, so that the positive and negative poles of the two probes are constantly exchanged as the positive and negative poles of the AC power jump, thereby significantly reducing the influence of the polarization effect of the electrode interface in the water and avoiding interference with the measurement signal, thereby ensuring the stable performance of the probe under a very wide range of water quality conditions and significantly improving the overall measurement accuracy.

[0154] In the embodiment of the present application, the signal processing circuit can be set according to actual needs, for example, it can include a rectifier circuit and a filter circuit, or it can also include a signal amplifier 8, etc. For example, one of the two probes can be connected to the output end of the high-frequency AC power supply 5, and the other can be connected to the input end of the signal amplifier 8.

[0155] In some examples, the rectifier circuit and the filter circuit can be integrated in the signal filter 9 to convert the measurement signal containing the flow field information. Alternatively, an envelope detector or other device can be selected. The envelope detector can include a full-wave rectifier and a low-pass filter, which can be used to extract the signal envelope information, thereby converting the measurement signal containing the flow field information.

[0156] In other examples, a signal amplifier 8 can be used and connected to the front end of a signal filter 9, that is, the signal amplifier 8 and the signal filter 9 are electrically connected in sequence between the probe device 3 and the signal acquisition card 10, so as to amplify the signal output by the probe device 3 and output it to the signal filter 9.

[0157] Therefore, the embodiment of the present application can perform flow field measurement in conjunction with the excitation method of a high-frequency alternating current signal through a signal processing circuit, and can amplify the high-frequency signal output by the probe device that contains flow field information, and may be a smaller voltage fluctuation signal, so as to facilitate subsequent signal processing by a signal filter, such as rectification and filtering, etc., to extract flow field information and filter out a large amount of interference signals mixed in the signal, thereby improving signal quality.

[0158] In this way, the "synchronization" and "measurement" parts in the embodiment of the present application can use high-frequency alternating current of a specific frequency as an excitation signal, and can be equipped with a special rectification and filtering scheme for collecting and processing test signals. This design not only avoids interference with the test signal, but also significantly reduces the influence of the polarization effect of the electrode interface in the water, thereby ensuring the stable performance of the probe under a very wide range of water quality conditions and significantly improving the overall measurement accuracy. Therefore, the water-gas medium probe system of the embodiment of the present application not only achieves high-efficiency and high-precision measurement, but also takes into account cost-effectiveness and practicality, and will be better suitable for experimental research on bubble flow dynamics.

[0159] refer to Figure 1The synchronous measurement device group may further include a variable resistor 7. The variable resistor 7 is connected in series to the output end of the probe device 3, and voltage conversion is performed by the variable resistor connected in series to the output end of the probe device, forming a measurement method of series circuit voltage division, thereby obtaining a smaller voltage fluctuation signal. And the resistance value of the variable resistor 7 can be adjusted to a suitable position according to the resistance value of the water medium at the tip of the bubble probe, thereby providing an electrical signal of a suitable size for the measurement circuit.

[0160] The synchronous measurement equipment group may also include a measurement terminal 11, which is electrically connected to the signal acquisition card and can be used to measure and record data, for example, it may include a processor, such as a computer. The processor may be a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above hardware circuit is fixed or reconfigurable, for example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the above functions. In addition, the processor can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0161] The measurement terminal 11 may be connected to the display terminal 12 to reflect the measured data on the display terminal in real time.

[0162] The synchronous measurement equipment group may further include a power supply 14, etc. The power supply 14 may be a 220V AC power supply.

[0163] Fig.15A waveform diagram of a specific example of measurement data obtained by the probe device when the medium type at the probe tip in the embodiment of the present application is gas is shown. Fig.16 A waveform diagram of a specific example of measurement data obtained by the probe device when the medium type at the probe tip in the embodiment of the present application is water is shown. Fig.17 A waveform diagram of a specific example of measurement data obtained by the probe device when the probe enters water from air and then leaves water in an embodiment of the present application is shown. Fig.18 A waveform diagram of a specific example of measurement data obtained by the probe device when the probe repeatedly enters and exits water and air in an embodiment of the present application is shown. As shown in the figure, when the medium type at the probe tip is gas, the measurement circuit is open, the signal value is 0, and the corresponding water phase volume fraction is also 0. When the medium type at the probe tip is water, the measurement circuit is open, the signal value is the partial pressure value of the external circuit resistance, and the corresponding water phase volume fraction is 1. In the process of the probe entering water from air and then leaving water, the measurement circuit changes from open to open, and then resumes open, indicating that the water phase volume fraction changes from 0 to 1, and then resumes 0. The probe repeatedly enters and exits water and air, and the water phase volume fraction also repeatedly jumps between 0 and 1.

[0164] It can be seen that the embodiments of the present application may include the following features:

[0165] 1. For water tunnel experiments:

[0166] The probe can be fixed on the side wall of the water tunnel by a clamping fixture, and can measure the water-gas medium at a certain point in the flow field inside the water tunnel.

[0167] 2. Accurate measurement:

[0168] The probe can be composed of two conductive tungsten steel needles with a very narrow spacing. Since the resistance of water is much smaller than that of air, the different media of water and air will form current paths with different resistance values ​​between the tungsten steel needles, and accurate measurement can be achieved through this principle. Due to the narrow spacing between the needles, high-precision measurement can be achieved.

[0169] 3. Measurement of any sampling point in the whole domain:

[0170] The probe needle can be clamped at one end of a slotted hollow stainless steel crossbar, which can be perpendicular to the probe needle. During the experiment, the relative position between the clamp and the probe can be adjusted as needed. The crossbar can be translated or rotated forward and backward through the holes on the side wall of the water tunnel, so as to achieve sampling at any position of the water tunnel flow field.

[0171] 4. High design strength:

[0172] The probe can use two extra-hard tungsten steel needles with a diameter of 0.5mm. The surface can be insulated. The tungsten steel needle (needle tip structure) can be fixed in the stainless steel tube (needle body) by mechanical friction and structural sealant. The tungsten steel needle tail and the multi-core wire can be connected by an extremely fine wire and can be hidden in the stainless steel tube of the needle body after sealing. The overall structure of the probe is strong. The probe can be clamped on the crossbar by a mechanical clamp and can be fastened with screws. The crossbar can be fixed to the side wall plate of the water tunnel through the Huff mechanical structure with copper bearings. All wires and fragile structures can be protected in the stainless steel tube to ensure the high mechanical strength of the probe system. The probe can work stably in an environment with high flow rate (tens of meters per second), large water depth (tens of meters), and complex water quality (low water purity).

[0173] 5. Low cost:

[0174] All components of the probe system can be manufactured using industrial standard products, including tungsten steel needles, stainless steel tubes, clamping cross bars, etc. The parts that require secondary processing have low processing costs, support mass production, and have low manufacturing costs.

[0175] 6. Quick response:

[0176] The probe system can use a 10000Hz signal acquisition card to achieve real-time measurement and analysis, and has the characteristics of fast response and real-time measurement.

[0177] 7. Water tightness:

[0178] The probe system has good watertightness to ensure the isolation of the water tunnel from the external environment. The watertightness of the system can be achieved through the following designs:

[0179] 7.1 The connection between the cross bar and the side wall of the water tunnel: A sealing groove can be reserved on the outside of the through hole of the side wall plate of the water tunnel. After the cross bar passes through the sealing stop seal, an aluminum retaining ring and an aluminum baffle can be installed respectively. The structure can be tightened by screws to compress the sealing stop seal to ensure water tightness.

[0180] 7.2 Gap between signal wire and crossbar: The gap between the wire and the crossbar can be filled with an O-shaped rubber ring, and then the rubber ring can be compressed by screws to achieve sealing.

[0181] 7.3 Gaps between tungsten steel needles: The tungsten steel needles can be treated with insulating paint, and the needle tip position can be fixed with waterproof glue, and finally waterproof sealant can be applied.

[0182] 7.4 Connection between needle tip and needle body, tungsten steel needle and wire: After heat sealing with heat sealing tube, UV curing glue and structural sealant can be used to seal and waterproof to ensure sealing.

[0183] 8. Synchronization: The synchronization trigger can add a trigger signal to the measurement data of the probe and pressure sensor, and can synchronize the high-speed camera to start taking pictures.

[0184] In some examples, non-invasive methods, such as X-ray methods, can be used to achieve precise measurement of any point in the entire river basin, but the measurement accuracy is relatively low.

[0185] In some cases, the structural strength can be increased by customizing higher-strength parts and connectors, but the corresponding cost will increase significantly. In order to reduce costs, the quality of parts can be reduced, such as not using tungsten steel needles and using lower-strength ordinary steel needles.

[0186] In some examples, water tightness can also be improved by reducing the movable joint parts, such as the protrusion 4054 can be integrated with the lower half block 405.

[0187] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes may be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form other embodiments of the present application that may not be explicitly described. Therefore, the above embodiments only express several implementations of the present application and do not limit the scope of protection of the patent of this application.

Claims

1. A water-air medium probe system for a water tunnel environment, characterized in that: The water-gas medium probe system comprises: A probe device is provided in the water tunnel environment, comprising a dual probe having two carbide needles, for performing flow field measurement of at least water and gas medium types in the water tunnel environment; A clamping and fixing device is installed on the side wall of the water tunnel environment providing device, and is used to clamp the probe device and adjust the position of the probe device in the water tunnel environment to measure the flow field at any preset sampling point in the entire flow basin of the water tunnel environment; and provide a sealed channel isolated from the water tunnel environment to at least accommodate a wire electrically connected to the probe device; wherein the connection between the clamping and fixing device and the side wall is a sealed connection; and The synchronous measurement equipment group is electrically connected to the probe device through the wire, and is used to control multiple sensors including the probe device based on the trigger signal to achieve synchronous measurement.

2. The water-gas medium probe system according to claim 1, characterized in that: The probe device comprises: Two carbide needles; A multi-core wire, comprising two very fine wires; the two very fine wires are respectively connected to the two hard alloy needles in a one-to-one correspondence and the connection is sealed; and The hollow needle body comprises a hollow part and a side groove; the connection between the ultra-fine wire and the carbide needle is disposed in the hollow part, and the carbide needle and the hollow needle body are sealed and fixed; the side groove is connected to the sealing channel to allow the multi-core wire to pass into the sealing channel.

3. The water-gas medium probe system according to claim 1, characterized in that: The distance between the tips of the two cemented carbide needles is greater than 0 and lower than a spacing threshold to form an extremely narrow spacing.

4. The water-gas medium probe system according to claim 1, characterized in that: The clamping and fixing device comprises: A hollow crossbar, one end of which is connected to a preset connection area of ​​the hollow needle body of the probe device and fixed by a hard connection; the other end of which is sealed and connected to a side wall plate of the water tunnel environment providing device by a sealing connection device and penetrates the side wall plate; and The sealing connection device is sleeved on the hollow cross bar to enable the hollow cross bar to rotate around the axis; and fixes and seals the connection between the hollow cross bar and the side wall plate.

5. The water-gas medium probe system according to claim 4, characterized in that: The sealing connection device comprises: A step seal is sleeved on the hollow cross bar so that the hollow cross bar can rotate around its own rotation axis and translate forward and backward in the step seal; An aluminum retaining ring is sleeved on the hollow cross bar and arranged between the step seal and the secondary sealing plate; A secondary sealing plate, fixed to the side wall plate by screws, and pressing the step seal by the aluminum retaining ring to seal; A lower half block is fixed to the side wall plate by screws, and the hollow cross bar passes through the lower half block; an upper half block, matched with the lower half block to clamp and fix the hollow cross bar; and The bearing shell is placed at the position where the lower half block and the upper half block clamp the hollow cross bar.

6. The water-gas medium probe system according to claim 5, characterized in that: A first through hole is provided in the middle of the secondary sealing plate for the hollow cross bar to pass through.

7. The water-gas medium probe system according to claim 5, characterized in that: A third through hole is provided in the middle of the main body of the lower half block for the hollow cross bar to pass through; The main body of the lower half block is provided with a protrusion, and the protrusion is provided with a first groove whose shape is consistent with the first semicircular edge contour of the third through hole, so that the lower semicircular edge contour of the third through hole extends outward along the first groove.

8. The water-gas medium probe system according to claim 5, characterized in that: The upper half block is provided with a second groove having a shape consistent with the second semicircular edge contour of the third through hole, so that the second semicircular edge contour of the third through hole extends outwardly along the second groove.

9. The water-gas medium probe system according to any one of claims 1 to 8, characterized in that: The synchronous measurement equipment group includes a multi-channel synchronous trigger, a signal acquisition card, and at least one of the following: a pressure sensor; a high-speed camera; The multi-channel synchronous trigger is used to generate and output the trigger signal; The probe device, the pressure sensor and / or the high-speed camera are used to perform synchronous measurement under the control of the trigger signal; The response speed of the signal acquisition card exceeds a response speed threshold, and is used to acquire the flow field information measured by the probe device for recording and / or display.

10. The water-gas medium probe system according to claim 9, characterized in that: The synchronous measurement equipment group also includes: A high-frequency AC power supply, used to output a high-frequency AC signal as an excitation signal to the probe device; and The signal processing circuit is used to at least rectify and filter the high-frequency signal containing the flow field information output by the probe device to obtain a measurement signal containing the flow field information that is convenient for the signal acquisition card to collect.

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