Underwater displacement measuring device

Abstract

The utility model belongs to the technical field of underwater equipment movable part displacement measurement, and particularly relates to an underwater displacement measurement device, which comprises a measurement wedge block and a movable wedge block which are made of the same material, a measurement assembly is arranged in the measurement wedge block, and the measurement assembly comprises an ultrasonic probe, a watertight joint and a measurement circuit. The ultrasonic probe is electrically connected with the measuring circuit, the measuring circuit is electrically connected with the watertight joint, the watertight joint extends out of the measuring wedge block, the opposite surface of the inclined surface of the movable wedge block is a reflecting surface, the ultrasonic probe is mounted towards the reflecting surface, and the measuring circuit is connected with a temperature sensor; the displacement measurement method comprises the step of measuring an underwater to-be-measured body by using the underwater displacement measurement device so as to solve the problem that a displacement measurement sensor in the prior art cannot overcome the influence of the thickness of a shell and the influence of liquid properties and electromagnetic characteristics.

Description

Technical Field

[0001] This utility model belongs to the field of underwater equipment movable component displacement measurement technology, specifically relating to a displacement measurement device for underwater applications. Background Technology

[0002] Common displacement measurement sensors include resistive displacement sensors, capacitive displacement sensors, inductive displacement sensors, and laser displacement sensors. Their principle can be understood as the moving part and the stationary part being measured being coupled through some form of physical parameter, and the movement of the moving part being reflected by changes in the degree of this coupling.

[0003] Due to the corrosive nature of the water environment in underwater equipment, the non-corrosion-resistant components of the displacement sensors used are often sealed in the housing to isolate them from the object being measured. Furthermore, the high water pressure results in a large pressure-bearing thickness at the installation location of these non-corrosion-resistant components, leading to a longer distance between the moving and stationary parts during electromagnetic coupling, resulting in poor coupling performance. This effect is even more pronounced in seawater. Additionally, visibility limitations restrict the application of laser-based measurements. Therefore, there is an urgent need for a displacement measurement device and method that can overcome the influence of housing thickness, liquid properties, and electromagnetic characteristics underwater. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a displacement measuring device for underwater applications, so as to solve the problem that the displacement measuring sensors in the prior art cannot overcome the influence of shell thickness, liquid properties and electromagnetic characteristics.

[0005] One embodiment of this utility model provides a displacement measuring device for underwater applications, including a measuring wedge and a movable wedge. The inclined surface of the measuring wedge is movably connected to the inclined surface of the movable wedge, and the measuring wedge and the movable wedge are tightly connected by a clamping device 4.

[0006] The measuring wedge has a measuring component installed inside. The measuring component includes an ultrasonic probe, a watertight connector, and a measuring circuit of the same material. The ultrasonic probe is electrically connected to the measuring circuit, and the measuring circuit is electrically connected to the watertight connector. The watertight connector extends out of the measuring wedge.

[0007] The opposite surface of the inclined surface of the movable wedge is a reflective surface, the ultrasonic probe is mounted facing the reflective surface, and the measuring circuit is electrically connected to a temperature sensor;

[0008] An ultrasonic probe is used to emit ultrasonic waves that are perpendicularly incident on a reflecting surface, and to receive the echoes reflected by the reflecting surface, and to continuously transmit the corresponding acoustic signals to the measurement circuit.

[0009] It also includes an external final computing device, which is pre-loaded with wedge angle data for the moving wedge;

[0010] The temperature sensor is used to measure the temperature of the moving wedge and continuously transmits the temperature signal to the measurement circuit;

[0011] The measurement circuit is used to process the acoustic wave signal continuously transmitted by the ultrasonic probe and the temperature signal continuously transmitted by the temperature sensor, and generate calculation results that are transmitted to the watertight connector.

[0012] The watertight connector is used to receive the calculation results from the measurement circuit and transmit them to the external final computing device;

[0013] It should be noted that in actual use, since the ultrasonic probe is installed facing the reflective surface, the ultrasonic waves emitted by the ultrasonic probe are always perpendicular to the emission surface so that the echo is directly reflected back to the ultrasonic probe through the reflective surface, thereby obtaining an accurate sound wave signal. The measurement circuit can then measure the actual displacement of the ultrasonic probe relative to the emission surface based on the sound wave signal, that is, the vertical displacement of the measuring wedge relative to the moving wedge.

[0014] In actual use, the measuring wedge and the moving wedge can be made of the same material. Since the measuring wedge and the moving wedge are made of the same material and are in the same underwater environment, the temperature sensor continuously obtains the temperature of the measuring wedge, which is also the temperature of the moving wedge. The measuring circuit can measure the actual displacement of the ultrasonic probe relative to the emitting surface based on the temperature signal, that is, the vertical displacement of the measuring wedge relative to the moving wedge.

[0015] In practical use, the measuring circuit internally includes a processor for processing the continuously transmitted acoustic wave signal from the ultrasonic probe and the continuously transmitted temperature signal from the temperature sensor, as well as a sound velocity meter storing the sound velocity of ultrasound in different materials under different temperature conditions. Upon receiving the acoustic wave and temperature signals, the processor converts the acoustic wave signal into the time difference between the ultrasonic wave emitted from the initial position and the actual position and the received echo, respectively. Simultaneously, it converts the temperature signal into the actual sound velocity. Based on the time difference between the ultrasonic wave emitted from the initial position and the received echo, and in conjunction with the actual sound velocity, it calculates the initial and actual distances of the ultrasonic probe relative to the emitting surface, and transmits these initial and actual distances to the watertight connector. The calculation principle formulas for the initial and actual distances are as follows: , where s is the distance between the ultrasonic probe and the reflecting surface, v is the actual sound speed, and T is 1 / 2 of the time it takes for the ultrasonic probe to emit ultrasonic waves and receive the echo.

[0016] In practical use, the external final calculation device can obtain wedge angle data by having staff manually input the wedge angle data of the moving wedge block. This data, combined with the calculation results from the measurement circuit transmitted from the watertight joint to the external calculation device, allows for the calculation of the actual displacement. The formula for calculating the actual displacement is as follows: Where D is the actual displacement result, d is the difference between the actual distance and the initial distance, and a is the wedge angle data; the initial distance is set to Sc, and the actual distance is set to... According to the calculation formula, we can obtain ;

[0017] It should be noted that the specific structure of the clamping device 4 in this solution is not limited, as long as it can ensure a tight connection between the measuring wedge and the moving wedge;

[0018] In this solution, by setting measuring wedges and moving wedges of the same material, and setting measuring components in the measuring wedges, non-corrosion-resistant parts can be protected in the measuring wedges. On the other hand, the measuring components can overcome the influence of the measuring wedges and moving wedges, directly generate calculation results in the measuring circuit of the measuring components, and overcome the influence of liquid properties and electromagnetic characteristics through watertight joints, directly transmitting the calculation results to the external final calculation device to obtain accurate displacement data.

[0019] Compared with the prior art, this utility model has the following advantages:

[0020] 1. By mounting the ultrasonic probe toward the reflecting surface, this utility model can ensure that the ultrasonic waves emitted by the ultrasonic probe are always perpendicularly incident on the reflecting surface and directly reflected back to the ultrasonic probe. This perpendicular incident and reflection method greatly reduces the error caused by the change of ultrasonic wave propagation path and improves the accuracy of displacement measurement based on sound wave signals.

[0021] 2. This utility model uses measuring wedges and moving wedges made of the same material, which can ensure that the ultrasonic waves emitted by the ultrasonic probe in the measuring component have the same speed in the measuring wedges and moving wedges. In conjunction with the temperature sensor connected to the measuring circuit, the temperature of the measuring wedges and moving wedges can be obtained in real time. Based on this temperature signal and combined with the sound velocity meter stored in the measuring circuit, the actual sound velocity of the ultrasonic wave at different temperatures can be accurately calculated. This allows for the accurate calculation of the distance change between the ultrasonic probe and the reflecting surface. In underwater environments with large temperature fluctuations, this utility model can effectively avoid measurement errors caused by differences in sound velocity due to temperature changes, ensuring that the displacement measurement results always maintain high accuracy.

[0022] 3. This invention converts the acoustic wave signal into a time difference through a processor in the measurement circuit, and calculates the distance change between the ultrasonic probe and the reflecting surface by combining the actual sound velocity determined by the temperature signal. The measurement principle is simple, intuitive and efficient. Compared with some complex displacement measurement methods that use multi-sensor fusion or indirect measurement principles, this invention reduces the accumulation of errors in intermediate links and improves the reliability of measurement data. In addition, the measurement principle is easy to understand and implement, which facilitates the debugging, maintenance and operation of equipment in practical engineering applications.

[0023] 4. This utility model, through the watertight connector in the measuring component, can effectively prevent water from entering the interior of the utility model, ensure the safety and reliability of the internal circuit and signal transmission, maintain the good sealing performance of the utility model, ensure the continuous and stable operation of the entire measuring device, reduce the equipment failure rate, and improve the overall reliability of the equipment.

[0024] 5. The external final calculation device of this utility model can acquire wedge angle data in multiple ways and calculate the actual displacement result in collaboration with the measurement circuit calculation result data transmitted by the watertight connector. This data processing and collaboration method has high flexibility and can select the appropriate wedge angle data acquisition method according to the actual application scenario and needs to meet the needs of different users and different application scenarios.

[0025] In one embodiment, the measurement circuit includes a measurement module, which includes a processor and a memory. The processor has a preset correction table for wedges of different materials, and the memory stores the measurement program.

[0026] The memory is used to receive operating signals from the processor and execute measurement programs based on the operating signals.

[0027] In this solution, the processor has a preset correction table for different material wedges. This table, combined with temperature information obtained from a temperature sensor, can accurately compensate for the difference in sound velocity caused by temperature changes in different material wedges. Since different materials have different coefficients of thermal expansion and acoustic properties, the sound velocity will change when the underwater ambient temperature fluctuates, thus affecting the accuracy of displacement measurement. The correction table can accurately adjust the sound velocity calculation parameters according to the current temperature and wedge material, making the measurement results closer to the true displacement value and effectively reducing measurement errors caused by temperature and material factors.

[0028] In one embodiment, the step of obtaining the correction table includes:

[0029] Select a test block made of the same material as the moving wedge and measure its thickness Y in a certain direction;

[0030] Record the initial temperature value Using the same test circuit as the measurement circuit, the time required for an ultrasonic wave emitted by a similar probe to pass through a thickness Y was measured. ;

[0031] Using thickness Y and initial temperature value Calculate the speed of sound ;

[0032] Change the temperature value to , and obtained a series ;

[0033] A series and Record the data one-to-one, calculate the slope and curvature of the sound speed as a function of temperature, and apply this to a series of... and The data is interpolated to generate a correction table.

[0034] In this scheme, a correction table is generated by using a test block made of the same material as the moving wedge. This allows for precise correction of the sound velocity based on the specific material characteristics of the wedge in the device. By obtaining the correction table, the correspondence and specific values ​​of sound velocity and temperature among the materials that can be used for the moving wedge can be obtained. This enables the measurement circuit to accurately adjust the sound velocity calculation based on the current temperature during actual measurement, thereby greatly improving the accuracy of displacement measurement and reducing displacement measurement deviation caused by sound velocity errors.

[0035] In one embodiment, the execution steps of the measurement procedure include:

[0036] Instructions drive the processor to acquire sound wave signals and temperature signals for sound wave signal measurement;

[0037] In the instruction-driven measurement circuit, the processor measures the time Tc between the initial position of the ultrasonic probe emitting the ultrasonic wave and the receiving echo, and the final position of the ultrasonic probe emitting the ultrasonic wave and the receiving echo. ;

[0038] Obtain the temperature t from the temperature signal, and then calculate the velocity of sound at that time according to the correction table. ;

[0039] Through Tc, and The initial displacement Sc and the actual displacement of the measuring wedge were calculated. ;

[0040] Output Sc and To the watertight joint.

[0041] In this scheme, by using a measurement program in conjunction with a measurement circuit, acoustic and temperature signals can be directly converted into the initial position displacement Sc and actual position displacement of the measuring wedge. and output Sc and To the watertight connector, to match the watertight connector to connect Sc and The data is transmitted to an external final calculation device to obtain the actual displacement result; this measurement program is characterized by its simplicity, intuitiveness, and high efficiency.

[0042] In one embodiment, the bottom of the movable wedge is provided with a sliding guide rail, and the movable wedge is movably mounted on the sliding guide rail; the clamping device is provided with a clamping guide rail for the clamping end of the clamping device to move in the vertical direction, the clamping end of the clamping device is movably mounted on the clamping guide rail, and the clamping end is connected to the measuring wedge.

[0043] In this scheme, the sliding guide rail ensures that the moving wedge moves smoothly along a predetermined straight line, and the clamping guide rail ensures that the clamping end of the clamping device moves vertically on the clamping guide rail, thereby ensuring that the measuring wedge moves smoothly in the vertical direction. This arrangement can avoid unstable movements such as offset and swaying of the moving wedge and the measuring wedge, and can make the relative position change between the ultrasonic probe and the reflecting surface accurately reflect the displacement of the underwater object to be measured, which significantly improves the accuracy of displacement measurement.

[0044] In one embodiment, a sealing component is installed between the movable wedge and the sliding guide rail.

[0045] In one embodiment, the sealing component includes an elastic filler disposed at the bottom of the movable wedge, and elastic scrapers are provided at both ends of the elastic filler.

[0046] In this solution, by setting an elastic filler at the bottom of the moving wedge, the moving wedge is slidably connected to the sliding guide rail through the elastic filler. This can significantly reduce the amount of underwater impurities entering from the bottom gap between the moving wedge and the sliding guide rail, thereby reducing the impact of underwater impurities on the interior of the sliding guide rail and ensuring the normal operation and service life of the sliding guide rail.

[0047] In addition, by installing elastic scrapers at both ends of the elastic filler, underwater impurities attached to the guide rail can be scraped off during the movement of the moving wedge. The elastic scrapers work together with the elastic filler to reduce the amount of underwater impurities entering the guide rail, thereby protecting the contact area between the moving wedge and the sliding guide rail. This improves the device's resistance to underwater impurity interference and enables it to work stably in the harsh underwater environment of high pressure and high humidity in the deep sea.

[0048] One aspect of this utility model provides a displacement measurement method, comprising measuring an underwater object using the aforementioned displacement measurement device for underwater applications, specifically including:

[0049] The staff obtains the wedge angle α of the moving wedge and inputs it into the external final calculation device;

[0050] Start the displacement measuring device to standby mode, and the displacement measuring device will obtain the correction table corresponding to wedges of different materials;

[0051] The displacement measuring device is deployed to the underwater target location and connected to the underwater object to be measured.

[0052] The displacement measuring device is switched to working status, and the displacement measuring device starts working and executes the measurement program;

[0053] Watertight connector output Sc and To the external final computing device, the external final computing device according to Sc, The data of the wedge angle α are used to calculate and output the actual displacement result of the underwater object to be measured.

[0054] It should be noted that the specific methods by which staff obtain the specific data of the wedge angle 'a' can be as follows: directly measuring the wedge angle 'a' of the moving wedge, directly reading the wedge angle information from the moving wedge parameter table, or connecting other automatic measuring devices to an external final calculation device to automatically read the wedge angle information and transmit it to the external final calculation device. These are similar methods for obtaining the specific data of the wedge angle 'a'.

[0055] It should be noted that the displacement measuring device also includes a controller that can control its working state and a signal receiver installed on the displacement measuring device. Specifically, the signal receiver can receive control signals from the controller to control the start / stop state and working state of the displacement measuring device.

[0056] Specifically, the controller can be a wireless remote control, and the signal receiver can be a signal transceiver. The operator can send signals to the signal receiver through the wireless remote control to control the start / stop status and working status of the displacement measuring device.

[0057] In this solution, staff only need to input the wedge angle 'a' into the external final calculation device and directly control the start / stop and working states of the displacement measuring device to directly obtain the actual displacement result of the underwater object to be measured. Compared with existing displacement measurement methods, this utility model reduces the complexity of the staff's operation process, reduces the probability of errors in the operation process, significantly lowers the threshold for staff to operate the displacement measuring device, and reduces the cost of manual training.

[0058] In one embodiment, the underwater displacement measuring device further includes a signal receiver and an external controller. The signal receiver is used to receive control signals from the external controller, and the external controller is used to control the start / stop state and working state of the underwater displacement measuring device.

[0059] In this solution, by setting up an external controller and signal receiver, when the displacement measurement device is used in the deep sea or in complex underwater environments such as strong currents, high water pressure, and dangerous underwater organisms, the staff can issue commands through the external controller from a safe position, which reduces the operational risks for the staff and improves the ease of operation.

[0060] In one embodiment, the underwater displacement measuring device is connected to the underwater object to be measured via the movable wedge.

[0061] In this scheme, the moving wedge is directly connected to the underwater object to be measured, enabling the moving wedge to respond quickly and accurately to the displacement changes of the underwater object to be measured. This avoids problems such as gaps, loosening, or elastic deformation that may occur in the connecting parts when a connecting part is set in the middle. This ensures that the relative displacement between the measuring wedge and the moving wedge can truly and accurately reflect the actual displacement of the underwater object to be measured, greatly improving the accuracy of displacement measurement. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0063] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the displacement measuring device for underwater applications according to this utility model;

[0064] Figure 2 This is a schematic diagram of the internal structure of the measuring wedge in one embodiment of the displacement measuring device for underwater applications according to this utility model.

[0065] Figure 3 This is a schematic diagram of the working state of the measuring wedge and the moving wedge in one embodiment of the displacement measurement method of this utility model;

[0066] Figure 4 This is a schematic diagram of the acoustic wave direction of a measuring wedge in one embodiment of the displacement measuring device for underwater applications according to this utility model.

[0067] Figure 5 This is a schematic diagram of the operation process of the operator in the displacement measurement method of this utility model.

[0068] The components include: 1. Measuring wedge; 2. Moving wedge; 3. Sliding guide rail; 4. Clamping device; 5. Ultrasonic probe; 6. Measuring circuit; 7. Watertight connector; 8. Reflecting surface; and 9. Clamping guide rail. Detailed Implementation

[0069] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0070] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0071] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0072] It should be noted in advance that this utility model does not specifically limit the specific structure of the PCB board, contact seat and terminal assembly used in this utility model. The contact seat is limited to having a structure that can install the shaft end drive assembly 2 and having external terminals. The PCB board is limited to having external terminals. The terminal assembly is limited to being respectively arranged on the contact seat, the PCB board and the shaft end housing 1. Therefore, the above specific structures are not shown in the drawings.

[0073] Please refer to Figure 1-5 One embodiment of this utility model provides a displacement measuring device for underwater, including a measuring wedge 1 and a movable wedge 2. The inclined surface of the measuring wedge 1 is movably connected to the inclined surface of the movable wedge 2, and the measuring wedge 1 and the movable wedge 2 are tightly connected by a clamping device 4.

[0074] The measuring wedge 1 is equipped with a measuring component, which includes an ultrasonic probe 5, a watertight connector 7, and a measuring circuit 6 made of the same material. The ultrasonic probe 5 is electrically connected to the measuring circuit 6, and the measuring circuit 6 is electrically connected to the watertight connector 7. The watertight connector 7 extends out of the measuring wedge 1.

[0075] The opposite surface of the inclined surface of the movable wedge 2 is the reflective surface 8, the ultrasonic probe 5 is installed facing the reflective surface 8, and the measuring circuit 6 is electrically connected to a temperature sensor.

[0076] The ultrasonic probe 5 is used to emit ultrasonic waves that are perpendicularly incident on the reflecting surface 8, and to receive the echoes reflected by the reflecting surface 8, and to continuously transmit the corresponding acoustic signals to the measurement circuit 6.

[0077] It also includes an external final computing device, which is pre-loaded with wedge angle data for the moving wedge 2;

[0078] The temperature sensor is used to measure the temperature of the moving wedge 2 and continuously transmits the temperature signal to the measurement circuit 6;

[0079] The measurement circuit 6 is used to process the sound wave signal continuously transmitted by the ultrasonic probe 5 and the temperature signal continuously transmitted by the temperature sensor, and generate calculation results to be transmitted to the watertight connector 7.

[0080] The watertight connector 7 is used to receive the calculation results from the measurement circuit 6 and transmit them to the external final calculation device;

[0081] It should be noted that in actual use, since the ultrasonic probe 5 is installed facing the reflective surface 8, the ultrasonic waves emitted by the ultrasonic probe 5 are always perpendicular to the emission surface, so that the echo is directly reflected back to the ultrasonic probe 5 through the reflective surface 8, thereby obtaining an accurate sound wave signal, which can be used by the measurement circuit 6 to measure the actual displacement of the ultrasonic probe 5 relative to the emission surface based on the sound wave signal, that is, to measure the vertical displacement of the wedge 1 relative to the moving wedge 2.

[0082] In actual use, the measuring wedge 1 and the moving wedge 2 can be made of the same material. Since the measuring wedge 1 and the moving wedge 2 are made of the same material and are in the same underwater environment, the temperature sensor continuously obtains the temperature of the measuring wedge 1, which is also the temperature of the moving wedge 2. The measuring circuit 6 can measure the actual displacement of the ultrasonic probe 5 relative to the emitting surface based on the temperature signal, that is, the vertical displacement of the measuring wedge 1 relative to the moving wedge 2.

[0083] In practical use, the measuring circuit 6 is internally equipped with a processor for processing the continuously transmitted acoustic wave signal from the ultrasonic probe 5 and the continuously transmitted temperature signal from the temperature sensor, as well as a sound velocity meter storing the sound velocity of ultrasound in different materials under different temperature conditions. Upon receiving the acoustic wave signal and temperature signal, the processor converts the acoustic wave signal into the time difference between the ultrasonic wave emitted by the ultrasonic probe 5 at its initial and actual positions and the received echo, respectively. Simultaneously, it converts the temperature signal into the actual sound velocity. Based on the time difference between the ultrasonic wave emitted by the ultrasonic probe 5 at its initial position and the received echo, and in conjunction with the actual sound velocity, it calculates the initial and actual distances of the ultrasonic probe 5 relative to the emitting surface, and transmits these initial and actual distances to the watertight connector 7. The calculation principle formulas for the initial and actual distances are as follows: , where s is the distance between the ultrasonic probe 5 and the reflecting surface 8, v is the actual sound speed, and T is 1 / 2 of the time from the ultrasonic probe 5 emitting the ultrasonic wave to receiving the echo.

[0084] Please refer to Figure 4 s is the actual distance between the ultrasonic probe 5 and the reflecting surface 8, v is the propagation speed of the sound wave in the wedge metal material, i.e., the speed of sound, which can be obtained by converting the sound wave signal into the actual speed of sound through the processor in the measuring circuit 6 in conjunction with the aforementioned speedometer, and T is half the time from the time the ultrasonic probe 5 emits the ultrasonic wave to the time it receives the echo, calculated using the principle formula. Calculate the initial distance of measuring wedge 1 when it is in its initial position, and the actual distance of measuring wedge 1 when it is in its actual position.

[0085] In practical use, the external final calculation device can obtain wedge angle data by having staff manually input the wedge angle data of the moving wedge 2. This data, combined with the calculation results from the measurement circuit 6 transmitted from the watertight connector 7 to the external calculation device, allows for the calculation of the actual displacement result. The formula for calculating the actual displacement result is as follows: Where D is the actual displacement result, d is the difference between the actual distance and the initial distance, and a is the wedge angle data; the initial distance is set to Sc, and the actual distance is set to... According to the calculation formula, we can obtain ;

[0086] It should be noted that the specific structure of the clamping device 4 in this embodiment is not limited, as long as it can ensure that the measuring wedge 1 and the moving wedge 2 are tightly connected;

[0087] In this embodiment, by setting measuring wedge 1 and moving wedge 2 of the same material, and setting measuring components in measuring wedge 1, non-corrosion-resistant parts can be protected in measuring wedge 1. On the other hand, measuring components can overcome the influence of measuring wedge 1 and moving wedge 2, directly generate calculation results in measuring circuit 6 in measuring components, and overcome the influence of liquid properties and electromagnetic characteristics through watertight connector 7, directly transmit the calculation results to external final calculation device to obtain accurate displacement data.

[0088] Compared with the prior art, this utility model has the following advantages:

[0089] 1. By mounting the ultrasonic probe 5 toward the reflecting surface 8, this utility model can ensure that the ultrasonic waves emitted by the ultrasonic probe 5 are constantly and perpendicularly incident on the reflecting surface 8 and directly reflected back to the ultrasonic probe 5. This perpendicular incident and reflection method greatly reduces the error caused by the change of ultrasonic wave propagation path and improves the accuracy of displacement measurement based on sound wave signals.

[0090] 2. This utility model uses measuring wedge 1 and moving wedge 2 made of the same material, which can ensure that the ultrasonic waves emitted by the ultrasonic probe 5 in the measuring component have the same speed in measuring wedge 1 and moving wedge 2. In conjunction with the temperature sensor connected to the measuring circuit 6, the temperature of measuring wedge 1 and moving wedge 2 can be obtained in real time. Based on this temperature signal and combined with the sound velocity meter stored in the measuring circuit 6, the actual sound velocity of the ultrasonic wave at different temperatures can be accurately calculated. In turn, the distance change between the ultrasonic probe 5 and the reflecting surface 8 can be accurately calculated. This utility model can effectively avoid measurement errors caused by sound velocity differences due to temperature changes in underwater environments with large temperature fluctuations, and ensure that the displacement measurement results always maintain high accuracy.

[0091] 3. This invention converts the acoustic wave signal into a time difference through the processor in the measurement circuit 6, and calculates the distance change between the ultrasonic probe 5 and the reflecting surface 8 by combining the actual sound velocity determined by the temperature signal. The measurement principle is simple, intuitive and efficient. Compared with some complex displacement measurement methods that use multi-sensor fusion or indirect measurement principles, this invention reduces the accumulation of errors in intermediate links and improves the reliability of measurement data. In addition, the measurement principle is easy to understand and implement, which facilitates the debugging, maintenance and operation of the equipment in practical engineering applications.

[0092] 4. The watertight connector 7 in the measuring component of this utility model can effectively prevent water from entering the interior of this utility model, ensure the safety and reliability of the internal circuit and signal transmission, maintain the good sealing performance of this utility model, ensure the continuous and stable operation of the entire measuring device, reduce the failure rate of the equipment, and improve the overall reliability of the equipment.

[0093] 5. The external final calculation device of this utility model can acquire wedge angle data in multiple ways and calculate the actual displacement result in collaboration with the calculation result data of the measurement circuit 6 transmitted by the watertight connector 7. This data processing and collaboration method has high flexibility and can select the appropriate wedge angle data acquisition method according to the actual application scenario and needs to meet the needs of different users and different application scenarios.

[0094] In one embodiment, the measurement circuit 6 includes a measurement module, which includes a processor and a memory. The processor has a preset correction table corresponding to wedges of different materials, and the memory stores a measurement program.

[0095] The memory is used to receive operating signals from the processor and execute measurement programs based on the operating signals.

[0096] In this embodiment, the processor has a preset correction table for different material wedges. This table can combine the temperature information obtained by the temperature sensor to accurately compensate for the difference in sound velocity caused by temperature changes in different material wedges. Since different materials have different coefficients of thermal expansion and acoustic properties, the sound velocity will change when the underwater ambient temperature fluctuates, thus affecting the accuracy of displacement measurement. The correction table can accurately adjust the sound velocity calculation parameters according to the current temperature and wedge material, so that the measurement result is closer to the true displacement value, effectively reducing the measurement error caused by temperature and material factors.

[0097] In one embodiment, the step of obtaining the correction table includes:

[0098] Select a test block made of the same material as the movable wedge 2 and measure the thickness Y in a certain direction;

[0099] Record the initial temperature value, and use the same test circuit as measurement circuit 6 to measure the time required for an ultrasonic wave emitted by a similar probe to pass through thickness Y. ;

[0100] Using thickness Y and initial temperature value Calculate the speed of sound ;

[0101] Change the temperature value to , and obtained a series ;

[0102] A series and Record the data one-to-one, calculate the slope and curvature of the sound speed as a function of temperature, and apply this to a series of... and The data is interpolated to generate a correction table.

[0103] In this embodiment, by using a test block made of the same material as the moving wedge 2 to generate a correction table, the sound velocity can be accurately corrected according to the specific material characteristics of the wedge in the device. By obtaining the correction table, the correspondence and specific values ​​of sound velocity and temperature among the materials that can be used for the moving wedge 2 can be obtained. This allows the measurement circuit 6 to accurately adjust the sound velocity calculation according to the current temperature during the actual measurement process, thereby greatly improving the accuracy of displacement measurement and reducing displacement measurement deviation caused by sound velocity error.

[0104] The specific data acquisition principle of the correction table in this embodiment is explained in detail below:

[0105] Let the thickness of the test block be Y, and the initial temperature be Y. Let the initial speed of sound be :according to The initial sound speed was calculated. Change the temperature value multiple times to ,according to A series of calculations were obtained And a series of records are generated by the processor in the test circuit. and Calculate the slope and curvature of the sound speed as a function of temperature, and apply this to a series of... and The data is interpolated, and the resulting correction table is stored in the memory of the test circuit.

[0106] In one embodiment, the execution steps of the measurement procedure include:

[0107] Instructions drive the processor to acquire sound wave signals and temperature signals for sound wave signal measurement;

[0108] In the instruction-driven measurement circuit 6, the processor measures the time Tc from the initial position when the ultrasonic probe 5 emits an ultrasonic wave to the received echo, and the final position when the ultrasonic probe 5 emits an ultrasonic wave to the received echo. ;

[0109] Obtain the temperature t from the temperature signal, and then calculate the velocity of sound at that time according to the correction table. ;

[0110] Through Tc, and The initial displacement Sc and actual displacement of the measuring wedge 1 were calculated. ;

[0111] Output Sc and To the watertight joint 7.

[0112] In this embodiment, the sound wave signal and temperature signal can be directly converted into the initial position displacement Sc and actual position displacement of the measuring wedge 1 by means of the measurement program and the measurement circuit 6. and output Sc and To the watertight connector 7, to match the watertight connector 7 to connect Sc and The data is transmitted to an external final calculation device to obtain the actual displacement result; this measurement program is characterized by its simplicity, intuitiveness, and high efficiency.

[0113] The principle by which the measurement program acquires specific data in this embodiment is explained in detail below:

[0114] Please refer to Figure 3 Let Tc be the time it takes for the ultrasonic probe 5 to emit an ultrasonic wave from its initial position and receive the echo, and let Tc be the time it takes for the ultrasonic probe 5 to emit an ultrasonic wave from its final position and receive the echo. Let the velocity of sound corresponding to the temperature in the temperature signal be... Let the initial position displacement be Sc, and the actual position displacement be... :

[0115] When the displacement measuring device starts working, the processor sends a working signal to the memory, the measurement program begins execution, and acquires Tc when measuring wedge 1 is in its initial position and Tc when measuring wedge 1 is in its final position. And obtained through the temperature correspondence correction table in the temperature signal. ,according to The initial position displacement Sc is obtained, according to Obtain the actual position displacement .

[0116] In one embodiment, the movable wedge 2 is provided with a sliding guide rail 3 at its bottom, and the movable wedge 2 is movably mounted on the sliding guide rail 3; the clamping device 4 is provided with a clamping guide rail 9 for the clamping end of the clamping device 4 to move in the vertical direction, the clamping end of the clamping device is movably mounted on the clamping guide rail 9, and the clamping end is connected to the measuring wedge 1.

[0117] In this embodiment, the sliding guide rail 3 ensures that the moving wedge 2 moves smoothly along a predetermined straight line, and the pressing guide rail 9 ensures that the pressing end of the pressing device 4 moves vertically on the pressing guide rail 9, thereby ensuring that the measuring wedge 1 moves smoothly in the vertical direction. This arrangement can avoid unstable movements such as offset and swaying of the moving wedge 2 and the measuring wedge 1, and the relative position change between the ultrasonic probe 5 and the reflecting surface 8 can accurately reflect the displacement of the underwater object to be measured, significantly improving the accuracy of displacement measurement.

[0118] In one embodiment, a sealing component is installed between the movable wedge 2 and the sliding guide rail 3.

[0119] In one embodiment, the sealing component includes an elastic filler disposed at the bottom of the movable wedge 2, and elastic scrapers are disposed at both ends of the elastic filler.

[0120] In this embodiment, by providing an elastic filler at the bottom of the movable wedge 2, the movable wedge 2 is slidably connected to the sliding guide rail through the elastic filler, which can significantly reduce the amount of underwater impurities entering from the gap between the movable wedge 2 and the sliding guide rail 3, thereby reducing the impact of underwater impurities on the interior of the sliding guide rail 3 and ensuring the normal operation and service life of the sliding guide rail 3.

[0121] In addition, by installing elastic scrapers at both ends of the elastic filler, underwater impurities attached to the guide rail can be scraped off during the movement of the moving wedge 2. The elastic scrapers work together with the elastic filler to protect the contact area between the moving wedge 2 and the sliding guide rail 3, thereby improving the device's ability to resist underwater impurity interference and enabling it to work stably in the harsh underwater environment of high pressure and high humidity in the deep sea.

[0122] Additionally, in this embodiment, the specific structure of the elastic filler and the elastic scraper is not limited. The specific structure of the elastic filler is simply to be able to adapt to the sliding guide rail 3 and drive the moving wedge 2 on the sliding guide rail 3. The elastic scraper is simply to be able to scrape off the area of ​​the sliding guide rail 3 that the elastic filler is about to reach when the elastic filler moves with the moving wedge 2.

[0123] One embodiment of this utility model provides a displacement measurement method, including measuring an underwater object using the aforementioned displacement measurement device for underwater applications, specifically including:

[0124] The staff obtains the wedge angle α of the moving wedge 2 and inputs it into the external final calculation device;

[0125] Start the displacement measuring device to standby mode, and the displacement measuring device will obtain the correction table corresponding to wedges of different materials;

[0126] The displacement measuring device is deployed to the underwater target location and connected to the underwater object to be measured.

[0127] The displacement measuring device is switched to working status, and the displacement measuring device starts working and executes the measurement program;

[0128] The watertight connector 7 outputs Sc and wedge angle a to an external final calculation device. The external final calculation device performs calculations based on the data of Sc and wedge angle a, and outputs the actual displacement result of the underwater object to be measured.

[0129] It should be noted that the specific methods by which staff obtain the specific data of wedge angle 'a' can be as follows: directly measuring the wedge angle 'a' of the moving wedge block 2, directly reading the wedge angle information in the parameter table of the moving wedge block 2, or connecting other automatic measuring devices to the external final calculation device to automatically read the wedge angle information and transmit it to the external final calculation device. These are similar methods that can obtain the specific data of wedge angle 'a'.

[0130] It should be noted that the displacement measuring device also includes a controller that can control its working state and a signal receiver installed on the displacement measuring device. Specifically, the signal receiver can receive control signals from the controller to control the start / stop state and working state of the displacement measuring device.

[0131] Specifically, the controller can be a wireless remote control, and the signal receiver can be a signal transceiver. The operator can send signals to the signal receiver through the wireless remote control to control the start / stop status and working status of the displacement measuring device.

[0132] In this embodiment, the operator only needs to input the wedge angle α into the external final calculation device and directly control the start / stop and working states of the displacement measuring device to directly obtain the actual displacement result of the underwater object to be measured. Compared with the existing displacement measurement methods, this utility model reduces the cumbersome operation process of the operator, reduces the probability of errors in the operation process, significantly lowers the threshold for the operator to operate the displacement measuring device, and reduces the cost of manual training.

[0133] The principle by which the external final calculation device obtains the actual displacement result in this embodiment is explained in detail below:

[0134] Please refer to Figure 3 For measuring wedge 1 and moving wedge 2, there is a formula. Where D is the moving distance of the moving wedge 2 from the initial position to the actual position, d is the moving distance of the ultrasonic probe 5 in the measuring wedge 1 relative to the reflecting surface 8, and a is the wedge angle;

[0135] Based on the principles in the aforementioned measurement procedure, we can obtain ;

[0136] Therefore, Sc and are obtained through the measurement component. The distance D that the moving wedge 2 moves from its initial position to its actual position can be obtained. In the actual use of the displacement measuring device, the moving wedge 2 is directly connected to the underwater object to be measured, so D is the final actual displacement result.

[0137] In one embodiment, the displacement measuring device for underwater further includes a signal receiver and an external controller, the signal receiver being used to receive control signals from the external controller, and the external controller being used to control the start / stop state and working state of the displacement measuring device for underwater.

[0138] In this embodiment, by setting an external controller and a signal receiver, when the displacement measurement device for underwater is used in complex underwater environments such as deep sea or in the presence of strong water currents, high water pressure, or dangerous underwater organisms, the operator can issue commands through the external controller from a safe position, which reduces the operator's operational risk and improves the operator's operational convenience.

[0139] In one embodiment, the displacement measuring device for underwater is connected to the underwater object to be measured via the movable wedge 2.

[0140] In this embodiment, the movable wedge 2 is directly connected to the underwater object to be measured, enabling the movable wedge 2 to respond quickly and accurately to the displacement changes of the underwater object to be measured. This avoids problems such as gaps, loosening, or elastic deformation that may occur when connecting components are set in the middle. This ensures that the relative displacement between the measuring wedge 1 and the movable wedge 2 can truly and accurately reflect the actual displacement of the underwater object to be measured, greatly improving the accuracy of displacement measurement.

[0141] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A displacement measuring device for underwater applications, characterized in that, It includes a measuring wedge and a moving wedge made of the same material. The inclined surface of the measuring wedge is movably connected to the inclined surface of the moving wedge, and the measuring wedge and the moving wedge are tightly connected by a clamping device. The measuring wedge is equipped with a measuring component, which includes an ultrasonic probe, a watertight connector, and a measuring circuit. The ultrasonic probe is electrically connected to the measuring circuit, and the measuring circuit is electrically connected to the watertight connector. The watertight connector extends out of the measuring wedge. The opposite surface of the inclined surface of the movable wedge is a reflective surface, the ultrasonic probe is mounted facing the reflective surface, and the measuring circuit is electrically connected to a temperature sensor. It also includes an external final computing device, which is configured to have pre-set wedge angle data for the moving wedge; wherein, The ultrasonic probe is configured to: emit ultrasonic waves perpendicularly incident on the reflecting surface, receive the echo reflected by the reflecting surface, and continuously transmit the corresponding acoustic signal to the measurement circuit. A temperature sensor is configured to measure the temperature of the moving wedge and continuously transmit the temperature signal to the measurement circuit. The measurement circuit is configured to process the acoustic wave signal continuously transmitted by the ultrasonic probe and the temperature signal continuously transmitted by the temperature sensor, and generate calculation results that are transmitted to the watertight connector. The watertight connector is configured to receive calculation results from the measurement circuit and transmit them to an external final computing device. The bottom of the movable wedge is provided with a sliding guide rail, and the movable wedge is movably mounted on the sliding guide rail; the clamping device is provided with a clamping guide rail for the clamping end of the clamping device to move in the vertical direction, the clamping end of the clamping device is movably mounted on the clamping guide rail, and the clamping end is connected to the measuring wedge.

2. The displacement measuring device for underwater use as described in claim 1, characterized in that, A sealing component is installed between the movable wedge and the sliding guide rail.

3. The displacement measuring device for underwater use as described in claim 2, characterized in that, The sealing component includes an elastic filler disposed at the bottom of the movable wedge, and elastic scrapers are provided at both ends of the elastic filler.

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