Intelligent marine sensor time constant measurement apparatus and method

Abstract

The present application relates to the technical field of sensor experiment measurement, in particular to a smart ocean sensor time response constant measurement device and method thereof, which comprises a measuring cylinder, a liquid pumping cylinder arranged in parallel on the right side of the measuring cylinder, and a driving mechanism arranged on the front side of the measuring cylinder. The measuring cylinder comprises an inner measuring bottle at the center of the inside, an annular piston arranged outside the inner measuring bottle, a pair of connecting rods arranged on the top surface of the annular piston, and a lifting rod arranged at the top end of the pair of connecting rods and driven by the driving mechanism. The present application uses a time-delay triggering mechanism of the liquid pumping cylinder after the initial liquid stable measurement is completed, which maximally reduces the mixing interval of the two kinds of fluids. When the contrast liquid acts as a step stimulation signal directly on the sensor probe, the momentum and flow direction can effectively expel the small amount of residual initial liquid from the bottom liquid outlet, thereby providing the sensor with a step change signal with steep front and high purity.

Description

Technical Field

[0001] This invention relates to the field of sensor experimental measurement technology, and more specifically, to a device and method for measuring the time response constant of an intelligent marine sensor. Background Technology

[0002] The time response constant of a smart ocean sensor is a key indicator of how quickly it responds to changes in environmental parameters, determining the accuracy of its data capture of transient processes. This measurement is crucial because an excessively slow response leads to signal distortion, failing to accurately reflect the dynamic changes in the ocean's fine structure and directly impacting the reliability of ocean model predictions, ecological research, and environmental monitoring. The main testing methods include the step response method and the periodic excitation method.

[0003] Patent application CN202411487125.1 discloses a miniaturized marine sensor time response constant measurement device, including a container, a partition assembly, and a lifting assembly. The partition assembly includes a partition, a door panel, a first drive device, and a first controller. The partition is fixed inside the container, dividing the container into an upper cavity and a lower cavity. The upper cavity is used to contain air, and the lower cavity is used to contain liquid. This reduces the overall volume, improves measurement efficiency, and lowers manufacturing costs.

[0004] However, existing measurement equipment cannot construct a stable and closed initial steady-state environment for the sensor before testing, and the switching process between the initial liquid and the control liquid involves severe fluid mixing, resulting in a slow leading edge and insufficient purity of the step signal. Secondly, the entire process is highly dependent on the timing and accuracy of manual operation, which is not only inefficient but also makes it difficult to guarantee the repeatability and accuracy of the measurement results. In addition, since the sensor actually works in water, the sudden change in medium when it enters water from the air will introduce additional interference, causing the measured response time to fail to truly reflect its underwater dynamic performance.

[0005] In view of this, we propose a device and method for measuring the time response constant of intelligent marine sensors. Summary of the Invention

[0006] The purpose of this invention is to provide a device and method for measuring the time response constant of an intelligent marine sensor. By using an annular piston to open the liquid-blocking plate at the end of its stroke, the initial liquid can quickly flow in and fill the space at the bottom of the bottle, thereby providing the sensor with a static, uniform and stable initial testing environment to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A smart marine sensor time response constant measuring device includes a measuring cylinder, a liquid extraction cylinder arranged parallel to the right side of the measuring cylinder, and a drive mechanism arranged in front of the measuring cylinder;

[0009] The measuring cylinder includes an inner measuring bottle at its center, an annular piston sleeved on the outside of the inner measuring bottle, a pair of connecting rods disposed on the top surface of the annular piston, and a lifting rod disposed on the top of the pair of connecting rods and which can be driven by a driving mechanism.

[0010] This setting allows the lifting rod to move upwards, which in turn drives the annular piston to move synchronously within the measuring cylinder via a connecting rod, thereby drawing the initial liquid into the measuring cylinder.

[0011] The inner test bottle includes a bottle body for placing the sensor, a liquid-blocking plate that slides inside the bottle body, a liquid outlet located at the bottom of the bottle body, a sealing rubber ring that is adhered to the inner wall of the bottle body for fixing the sensor, and a spray head that is snapped into the bottle body and located below the sealing rubber ring.

[0012] When the annular piston reaches its maximum stroke, it causes the liquid-blocking plate to move upward, allowing the initial liquid to enter the bottle and contact the bottom probe of the sensor.

[0013] The liquid extraction cylinder includes a circular piston, a liquid extraction tube and a liquid outlet tube disposed on the bottom surface of the circular piston, a circular rod disposed on the top surface of the circular piston, and two retaining rings disposed near the top of the circular rod. The end of the liquid outlet tube is connected to the spray head.

[0014] When this setting is in operation, after the lifting rod contacts the upper retaining ring, it drives the circular piston upward to draw the contrast liquid into the suction cylinder. After the lifting rod contacts the lower retaining ring, it sprays the contrast liquid through the spray head onto the sensor probe.

[0015] In the technical solution of the present invention, the measuring cylinder further includes a cylinder body, an electromagnetic valve inserted and fixed to the outside of the tube body at the bottom end of the cylinder body, a drain pipe and a take-up pipe fixed to the valve ports at the left and right ends of the electromagnetic valve by bolts, and a bracket for placing the suction cylinder by snapping and fixing to the outer wall of the cylinder body.

[0016] In the technical solution of the present invention, the inner wall of the cylinder is integrally formed with a limiting ring to restrict the position of the annular piston. The annular piston slides in the annular gap between the cylinder and the inner bottle. The bottom end of the connecting rod is thermally fused to the annular piston, and the top end of the connecting rod is snapped and fixed to the lifting rod. An insert block is integrally formed on the outer wall of the lifting rod.

[0017] The above setup, through the precise displacement of the annular piston within a specific cavity and the switching control of the solenoid valve, enables the automatic extraction and discharge of the initial liquid, laying an automated foundation for subsequent testing.

[0018] In the technical solution of the present invention, the bottle body has an inner layer for sliding of the liquid blocking plate, the outer wall of the bottle body has a through-flow groove near the bottom, the outer wall of the bottle body has a sliding groove near the top that is connected to the through-flow groove, and the top of the bottle body is fixedly attached to the bottle cap, which can be snapped onto the top surface of the cylinder.

[0019] In the technical solution of the present invention, the liquid blocking plate slides within the interlayer and the outer wall of the annular top is also fixed with an external protrusion that slides within the groove. A spring is provided above the annular top of the liquid blocking plate that abuts against the bottom surface of the bottle cap.

[0020] The aforementioned configuration allows the annular piston 130 to open the liquid blocking plate 123 at the end of its stroke, allowing the initial liquid to flow into the bottle through the liquid passage 1211. When the annular piston 130 moves downward, the liquid blocking plate 123 automatically resets and closes the flow channel under the action of the spring 124, ensuring that the initial liquid is sealed inside the chamber. This achieves controlled injection and sealing of the initial test liquid, creating a stable and repeatable initial test environment for the sensor.

[0021] In the technical solution of the present invention, the liquid extraction cylinder further includes a cylinder body that is snapped into the inside of the bracket, the circular piston slides on the inner wall of the cylinder body, the liquid extraction pipe and the liquid outlet pipe are both threaded to the bottom surface of the cylinder body, and a one-way liquid valve is provided at the top end of the liquid extraction pipe and the bottom end of the liquid outlet pipe.

[0022] In the technical solution of the present invention, the bottom end of the round rod is thermally fused to the round piston, the top end of the round rod is provided with a threaded groove, the lower retaining ring is integrally formed with the round rod, the upper retaining ring is threaded to the top end of the round rod, and the distance between the upper retaining ring and the lifting rod is the same as the distance between the upper and lower end walls of the liquid passage tank.

[0023] The above settings, through the spacing of the upper and lower baffle rings, ensure that the extraction and spraying of the comparison liquid are precisely timed after the operation of the initial liquid, thereby ensuring that the sensor receives the step impact of the comparison liquid after the liquid blocking plate 123 closes the flow channel, thus guaranteeing signal purity.

[0024] In the technical solution of the present invention, the driving mechanism includes a support frame, a motor fixedly connected to the top surface of the support frame by bolts, a lead screw coaxially connected to the output shaft of the motor, a sliding plate threaded to the outside of the lead screw, a pair of sliding rods parallel to the lead screw, a fixing clamp welded to the outer wall of the support frame, and a disassembly clamp fixed to the fixing clamp by a pair of hand screws.

[0025] In the technical solution of the present invention, the bottom end of the lead screw is rotatably connected to the middle partition of the support frame, the outer wall of the slide plate is provided with a slot adapted to the insert block, the slide rod is snapped and fixed to the middle partition of the support frame, the slide plate is slidably connected to a pair of slide rods, and the circular space at the center of the fixed clamping plate and the disassembly clamping plate after fixing is adapted to the size of the measuring cylinder.

[0026] The above setup, through the combination of motor, lead screw, and slide plate, converts rotary motion into precise linear motion and integrates a quick clamping function, ensuring the controllability and repeatability of equipment operation.

[0027] On the other hand, the present invention also provides a method for measuring the time response constant of an intelligent ocean sensor, using the aforementioned intelligent ocean sensor time response constant measuring device, comprising the following steps:

[0028] S1. First, the operator places the tubular sensor into the inner test bottle of the measuring cylinder, ensuring that its bottom probe is reliably fixed below the sealing rubber ring. Then, the annular piston is moved above the limit ring, and the insert of the lifting rod is inserted into the slide slot of the drive mechanism. Next, the measuring cylinder is placed in the slot of the fixing plate and the hand screw is tightened so that the disassembly plate and the fixing plate together complete the clamping fixation of the measuring cylinder. Then, the top of the liquid extraction cylinder is passed through the round hole of the bracket and initially positioned using an interference fit. Finally, the upper retaining ring is tightened to the top of the round rod, thus completing the assembly of the entire device.

[0029] S2. Next, place the fluid tank containing the initial liquid and the control liquid with specific parameters below the liquid collection tube and the liquid extraction tube respectively, and ensure that the openings of both tubes are completely submerged in the liquid.

[0030] S3. Then, start the motor of the drive mechanism to drive the lead screw to rotate, which will cause the slide plate and the lifting rod to move upward. The lifting rod will drive the annular piston to move upward through the connecting rod, and the initial liquid will be drawn into the annular cavity of the cylinder through the liquid extraction tube. When the top surface of the lifting rod contacts the retaining ring above the liquid extraction cylinder, it will continue to move upward and drive the circular piston to move upward, and the comparison liquid will be drawn into the cylinder through the liquid extraction tube.

[0031] S4. After that, the annular piston continues to move upward, and its top surface abuts against the outer protrusion of the liquid blocking plate, compressing the spring and pushing the liquid blocking plate to slide upward in the interlayer. The initial liquid then flows in through the liquid passage and fills the sealed space at the bottom of the bottle. After fully contacting the sensor probe, the sensor is turned on and connected to the data acquisition system to record its stable reading under the initial liquid environment.

[0032] S5. After the sensor reading stabilizes, control the solenoid valve to switch the cylinder to connect with the drain pipe. Then control the motor to reverse, drive the lead screw to move the slide plate and lifting rod downward. The liquid blocking plate slides down first under the action of the spring reset force, blocking the liquid passage. The lifting rod continues to move down until its bottom surface abuts against the retaining ring below the liquid extraction cylinder.

[0033] S6. As the lifting rod continues to move downward, the driving ring piston discharges the initial liquid in the cylinder through the drain pipe. At the same time, the driving circular piston forces the comparison liquid in the cylinder into the spray head through the outlet pipe. The comparison liquid is sprayed rapidly onto the sensor probe in the form of a jet, instantly replacing and displacing the residual initial liquid. The data acquisition system synchronously and at high speed records the complete dynamic response curve of the sensor from the moment it contacts the comparison liquid to the moment it reaches a new stable value. Based on the step response principle of a first-order system, the curve is nonlinearly fitted to calculate the time response constant of the sensor.

[0034] S7. After the measurement experiment is completed, disassemble the equipment in the reverse order of S1, take out the sensor, clean the measuring cylinder, the liquid extraction cylinder and related flow paths with deionized water, and dry them for later use.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] 1. The intelligent marine sensor time response constant measurement device and method, wherein the annular piston opens the liquid blocking plate at the end of its stroke, allowing the initial liquid to flow in quickly and fill the space at the bottom of the bottle, thereby providing the sensor with a static, uniform and stable initial test environment. Subsequently, the annular piston moves downward, and the liquid blocking plate automatically resets under the action of the spring, closing the liquid passage and sealing this small portion of initial liquid around the sensor probe, ensuring that the sensor is in a definite initial steady state at the start of the response. Through the liquid blocking plate and the spring, a phased stable test environment is created for the sensor, ensuring the reliability of the measurement reference.

[0037] 2. The intelligent marine sensor time response constant measurement device and method, through the delayed triggering mechanism after the initial liquid stabilization measurement is completed by the pumping cylinder, minimizes the mixing range of the two fluids. When the control liquid acts directly on the sensor probe as a step stimulus signal, the momentum and flow direction can effectively displace the small amount of initial liquid remaining outside the sensor from the bottom outlet, thereby providing the sensor with a step change signal with a steep leading edge and high purity, fundamentally ensuring the measurement accuracy of the time response constant. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0040] Figure 3 This is a cross-sectional schematic diagram of the measuring cylinder in this invention;

[0041] Figure 4 This is a cross-sectional view of the cylindrical body in this invention;

[0042] Figure 5 This is a cross-sectional view of the inner test bottle in this invention;

[0043] Figure 6 This is a partial cross-sectional schematic diagram of the internal test bottle in this invention;

[0044] Figure 7 This is a schematic diagram of the liquid-blocking plate in this invention;

[0045] Figure 8 This is a cross-sectional schematic diagram of the liquid extraction cylinder in this invention;

[0046] Figure 9 This is a schematic diagram of the drive mechanism in this invention;

[0047] Explanation of reference numerals in the attached figures:

[0048] 100. Measuring cylinder; 110. Cylinder body; 111. Limiting ring; 120. Inner measuring bottle; 121. Bottle body; 1210. Interlayer; 1211. Liquid passage groove; 1212. Slide groove; 122. Bottle cap; 123. Liquid blocking plate; 1230. Outer protrusion; 124. Spring; 125. Liquid outlet; 126. Sealing rubber ring; 127. Spray head; 130. Annular piston; 140. Connecting rod; 150. Lifting rod; 151. Insert block; 160. Solenoid valve; 161. Liquid taking pipe; 162. Liquid drain pipe; 170. Hanger;

[0049] 200. Liquid suction cylinder; 210. Cylinder body; 220. Circular piston; 230. Liquid suction tube; 240. Liquid outlet tube; 250. Round rod; 260. Retaining ring;

[0050] 300. Drive mechanism; 310. Support frame; 320. Motor; 330. Lead screw; 340. Slide plate; 341. Slot; 350. Slide rod; 360. Fixing clamp; 370. Removing clamp. Detailed Implementation

[0051] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0052] Please see Figures 1-4 As shown, this embodiment provides the following technical solution:

[0053] The intelligent marine sensor time response constant measurement device includes a measuring cylinder 100, a liquid extraction cylinder 200 arranged parallel to the right side of the measuring cylinder 100, and a drive mechanism 300 arranged in front of the measuring cylinder 100.

[0054] Specifically, the measuring cylinder 100 includes an inner measuring bottle 120 at its center, an annular piston 130 sleeved on the outside of the inner measuring bottle 120, a pair of connecting rods 140 disposed on the top surface of the annular piston 130, and a lifting rod 150 disposed on the top of the pair of connecting rods 140 and driven by the driving mechanism 300.

[0055] Furthermore, the measuring cylinder 100 also includes a cylinder body 110, a solenoid valve 160 inserted and fixed to the bottom tube body of the cylinder body 110, a drain pipe 162 and a take-up pipe 161 fixed to the valve ports at the left and right ends of the solenoid valve 160 by bolts, and a bracket 170 snapped and fixed to the outer wall of the cylinder body 110 for placing the liquid extraction cylinder 200.

[0056] Furthermore, the inner wall of the cylinder 110 is integrally formed with a limiting ring 111 that restricts the position of the annular piston 130. The annular piston 130 slides in the annular gap between the cylinder 110 and the inner bottle 120. The bottom end of the connecting rod 140 is thermally fused to the annular piston 130, and the top end of the connecting rod 140 is snapped and fixed to the lifting rod 150. An insert block 151 is integrally formed on the outer wall of the lifting rod 150.

[0057] Furthermore, the cylinder 110 is used to ensure the overall structural strength of the measuring cylinder 100. After the lifting rod 150 moves upward, it can drive the annular piston 130 to move synchronously within the measuring cylinder 100 through the connecting rod 140, thereby drawing the initial liquid into the measuring cylinder 100. The solenoid valve 160 controls the rotation of the valve inside it through electrical control, allowing the cylinder 110 to be connected to the liquid collection pipe 161 and the liquid discharge pipe 162 respectively. This setting, through the precise displacement of the annular piston 130 in a specific cavity, combined with the reversing control of the solenoid valve 160, realizes the automatic extraction and discharge of the initial liquid, laying an automated foundation for subsequent testing.

[0058] Please see Figures 5-7 As shown, in this embodiment, the internal test bottle 120 includes a bottle body 121 for placing the sensor, a liquid blocking plate 123 that slides inside the bottle body 121, a liquid outlet 125 disposed at the bottom of the bottle body 121, a sealing rubber ring 126 that is adhered to the inner wall of the bottle body 121 for fixing the sensor, and a spray head 127 that is snapped into the bottle body 121 and placed below the sealing rubber ring 126. When the annular piston 130 moves to its highest stroke, it drives the liquid blocking plate 123 to move upward, allowing the initial liquid to enter the bottle body 121 and contact the probe at the bottom of the sensor.

[0059] Specifically, the bottle body 121 has an inner layer 1210 for sliding the liquid blocking plate 123, the outer wall of the bottle body 121 has a through-flow groove 1211 near the bottom, the outer wall of the bottle body 121 has a sliding groove 1212 near the top, which is connected to the through-flow groove 1211, and the top of the bottle body 121 is fixedly attached to the bottle cap 122, which can be snapped onto the top surface of the cylinder 110.

[0060] Furthermore, the liquid blocking plate 123 slides within the interlayer 1210, and the outer wall of the ring at the top is also fixed with an outer protrusion 1230 that slides within the groove 1212. A spring 124 is provided above the ring of the liquid blocking plate 123 that abuts against the bottom surface of the bottle cap 122.

[0061] Furthermore, as the annular piston 130 continues to move upward, its top surface abuts against the outer protrusion 1230 of the liquid-blocking plate 123, compressing the spring 124 and pushing the liquid-blocking plate 123 to slide upward within the interlayer 1210. This allows the initial liquid to flow into and fill the sealed space at the bottom of the bottle 121 through the liquid passage 1211, making full contact with the sensor probe. When the annular piston 130 descends, the liquid-blocking plate 123 slides down first under the restoring force of the spring 124, blocking the liquid passage 1211. This leaves a small portion of the initial liquid remaining at the bottom of the bottle 121. The outlet 125 is used to allow the liquid in the bottle 121 to flow out after the liquid passage 1211 is blocked. The liquid is discharged through the outlet 125. The sealing rubber ring 126 is used to fully contact the outer wall of the tubular sensor to ensure the sealing of the probe area below it. The spray head 127 is used to quickly spray the liquid onto the sensor probe. In this setting, the annular piston 130 pushes open the liquid blocking plate 123 at the end of its stroke, so that the initial liquid can flow into the bottle 121 through the liquid passage 1211. When the annular piston 130 moves downward, the liquid blocking plate 123 automatically resets and closes the flow channel under the action of the spring 124, ensuring that the initial liquid is sealed in the chamber. This achieves controlled injection and sealing of the initial test liquid, creating a stable and repeatable initial test environment for the sensor.

[0062] Please see Figure 8 As shown, in this embodiment, the liquid extraction cylinder 200 includes a circular piston 220, a liquid extraction pipe 230 and a liquid outlet pipe 240 disposed on the bottom surface of the circular piston 220, a circular rod 250 disposed on the top surface of the circular piston 220, and two retaining rings 260 disposed near the top of the circular rod 250. The end of the liquid outlet pipe 240 is connected to the spray head 127. During operation, after the lifting rod 150 abuts against the upper retaining ring 260, it drives the circular piston 220 upward to draw the contrast liquid into the liquid extraction cylinder 200. After the lifting rod 150 abuts against the lower retaining ring 260, it sprays the contrast liquid through the spray head 127 onto the sensor probe.

[0063] Specifically, the liquid extraction cylinder 200 also includes a cylinder body 210 that is snapped into the inside of the bracket 170, a circular piston 220 that slides on the inner wall of the cylinder body 210, a liquid extraction pipe 230 and a liquid outlet pipe 240 that are both threaded to the bottom surface of the cylinder body 210, and a one-way liquid valve is provided at the top end of the liquid extraction pipe 230 and the bottom end of the liquid outlet pipe 240.

[0064] Furthermore, the bottom end of the round rod 250 is heat-fused to the round piston 220, and the top end of the round rod 250 is provided with a threaded groove. The lower retaining ring 260 is integrally formed with the round rod 250, and the upper retaining ring 260 is threaded to the top end of the round rod 250. The distance between the upper retaining ring 260 and the lifting rod 150 is the same as the distance between the upper and lower end walls of the liquid passage trough 1211.

[0065] Furthermore, when the top surface of the lifting rod 150 contacts the retaining ring 260 above the liquid extraction cylinder 200, it continues to move upward, driving the circular piston 220 to move upward. The contrast liquid is then drawn into the cylinder 210 through the liquid extraction pipe 230. The lifting rod 150 continues to move downward until its bottom surface contacts the retaining ring 260 below the liquid extraction cylinder 200. At the same time, the circular piston 220 is driven to push the contrast liquid in the cylinder 210 into the spray head 127 through the liquid outlet pipe 240. This allows the contrast liquid to be sprayed rapidly onto the sensor probe in the form of a jet, instantly replacing and displacing the residual initial liquid. This setting, through the spacing of the upper and lower retaining rings 260, ensures that the extraction and spraying of the contrast liquid are precisely timed after the operation of the initial liquid. This ensures that the sensor receives the step impact of the contrast liquid after the liquid blocking plate 123 closes the flow channel, thus guaranteeing signal purity.

[0066] Please see Figure 9 As shown, in this embodiment, the drive mechanism 300 includes a support frame 310, a motor 320 fixedly connected to the top surface of the support frame 310 by bolts, a lead screw 330 coaxially connected to the output shaft of the motor 320, a slide plate 340 threadedly connected to the outside of the lead screw 330, a pair of slide rods 350 arranged parallel to the lead screw 330, a fixing clamp 360 welded to the outer wall of the support frame 310, and a disassembly clamp 370 fixed to the fixing clamp 360 by a pair of hand screws.

[0067] Specifically, the bottom end of the lead screw 330 is rotatably connected to the middle partition of the support frame 310, and the outer wall of the slide plate 340 is provided with a slot 341 that matches the insert block 151. The slide rod 350 is snapped and fixed to the middle partition of the support frame 310. The slide plate 340 is slidably connected to a pair of slide rods 350. After the fixed clamping plate 360 ​​and the disassembly clamping plate 370 are fixed, the circular space in the center matches the size of the measuring cylinder 100.

[0068] Furthermore, the support frame 310 provides a placement area for the motor 320. After the motor 320 is started, it drives the lead screw 330 to rotate, thereby causing the slide plate 340 to move up and down outside the pair of slide rods 350. The slot 341 provides an insertion area for the insert block 151, thereby driving the lifting rod 150 to move synchronously. The fixed clamping plate 360 ​​cooperates with the disassembly clamping plate 370 to complete the quick assembly and disassembly of the measuring cylinder 100. This setting, through the combination of the motor 320, the lead screw 330 and the slide plate 340, converts the rotational motion into precise linear motion and integrates a quick clamping function, ensuring the controllability and repeatability of the equipment operation.

[0069] The intelligent marine sensor time response constant measurement method of the present invention, using the above-mentioned intelligent marine sensor time response constant measurement device, includes the following steps:

[0070] S1. First, the operator places the tubular sensor into the inner measuring bottle 120 of the measuring cylinder 100, ensuring that its bottom probe is reliably fixed below the sealing rubber ring 126. Then, the annular piston 130 is moved above the limiting ring 111, and the insert block 151 of the lifting rod 150 is inserted into the slot 341 of the slide plate 340 of the drive mechanism 300. Next, the measuring cylinder 100 is placed in the slot of the fixing clamp 360 and the hand screw is tightened so that the disassembly clamp 370 and the fixing clamp 360 together complete the clamping fixation of the measuring cylinder. Then, the top of the liquid extraction cylinder 200 is passed through the round hole of the bracket 170 and initially positioned using an interference fit. Finally, the upper retaining ring 260 is tightened to the top of the round rod 250, thus completing the assembly of the entire device.

[0071] S2. Next, place the fluid tank containing the initial liquid and the control liquid with specific parameters below the liquid collection tube 161 and the liquid extraction tube 230 respectively, and ensure that both tube openings are completely submerged in the liquid.

[0072] S3. Subsequently, the motor 320 of the drive mechanism 300 is started, driving the lead screw 330 to rotate, which drives the slide plate 340 and the lifting rod 150 to move upward. The lifting rod 150 drives the annular piston 130 to move upward through the connecting rod 140, and draws the initial liquid into the annular cavity of the cylinder 110 through the liquid extraction tube 161. When the top surface of the lifting rod 150 contacts the retaining ring 260 above the liquid extraction cylinder 200, it continues to move upward, which will drive the circular piston 220 to move upward, and draw the comparison liquid into the cylinder 210 through the liquid extraction tube 230.

[0073] S4. After that, the annular piston 130 continues to move upward, and its top surface abuts against the outer protrusion 1230 of the liquid blocking plate 123, compressing the spring 124 and pushing the liquid blocking plate 123 to slide upward in the interlayer 1210. The initial liquid then flows into the bottom sealed space of the bottle 121 through the liquid channel 1211 and fills it. After making full contact with the sensor probe, the sensor is turned on and connected to the data acquisition system to record its stable reading under the initial liquid environment.

[0074] S5. After the sensor reading stabilizes, control the solenoid valve 160 to switch to connect the cylinder 110 with the drain pipe 162. Then control the motor 320 to reverse and drive the lead screw 330 to move the slide plate 340 and the lifting rod 150 down. The liquid blocking plate 123 slides down first under the action of the spring 124's reset force, blocking the liquid passage trough 1211. The lifting rod 150 continues to move down until its bottom surface abuts against the retaining ring 260 below the liquid extraction cylinder 200.

[0075] S6. As the lifting rod 150 continues to move downward, the driving annular piston 130 discharges the initial liquid in the cylinder 110 through the drain pipe 162. At the same time, the driving circular piston 220 presses the comparison liquid in the cylinder 210 into the spray head 127 through the outlet pipe 240. The comparison liquid is sprayed rapidly onto the sensor probe in the form of a jet, instantly replacing and displacing the residual initial liquid. The data acquisition system synchronously and at high speed records the complete dynamic response curve of the sensor from the moment it contacts the comparison liquid to the moment it reaches a new stable value. Based on the step response principle of a first-order system, the curve is nonlinearly fitted to calculate the time response constant of the sensor.

[0076] S7. After the measurement experiment is completed, disassemble the equipment in the reverse order of S1, take out the sensor, clean the measuring cylinder 100, the liquid extraction cylinder 200 and related flow paths with deionized water, and dry them for later use.

[0077] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. A smart marine sensor time response constant measurement device, characterized in that: It includes a measuring cylinder, a liquid extraction cylinder arranged parallel to the right side of the measuring cylinder, and a drive mechanism arranged in front of the measuring cylinder; The measuring cylinder includes an inner measuring bottle at its center, an annular piston sleeved on the outside of the inner measuring bottle, a pair of connecting rods on the top surface of the annular piston, and a lifting rod on the top of the pair of connecting rods that can be driven by a drive mechanism. After the lifting rod moves upward, it can drive the annular piston to move synchronously inside the measuring cylinder through the connecting rods, thereby drawing the initial liquid into the measuring cylinder. The inner test bottle includes a bottle body for placing the sensor, a liquid blocking plate that slides inside the bottle body, a liquid outlet located at the bottom of the bottle body, a sealing rubber ring that is adhered to the inner wall of the bottle body for fixing the sensor, and a spray head that is snapped into the bottle body and located below the sealing rubber ring. When the annular piston moves to its highest stroke, it drives the liquid blocking plate to move upward, allowing the initial liquid to enter the bottle body and contact the probe at the bottom of the sensor. The liquid extraction cylinder includes a circular piston, a liquid extraction tube and a liquid outlet tube disposed on the bottom surface of the circular piston, a circular rod disposed on the top surface of the circular piston, and two retaining rings disposed near the top of the circular rod. The end of the liquid outlet tube is connected to the spray head. During operation, after the lifting rod abuts against the upper retaining ring, it drives the circular piston upward to draw the contrast liquid into the liquid extraction cylinder. After the lifting rod abuts against the lower retaining ring, it sprays the contrast liquid through the spray head to the sensor probe. The measuring cylinder also includes a cylinder body, an electromagnetic valve inserted and fixed to the outside of the tube at the bottom of the cylinder body, a drain pipe and a liquid collection pipe fixed to the valve ports at the left and right ends of the electromagnetic valve by bolts, and a bracket snapped and fixed to the outer wall of the cylinder body for placing the liquid collection cylinder. The inner wall of the cylinder is integrally formed with a limiting ring that restricts the position of the annular piston. The annular piston slides in the annular gap between the cylinder and the inner bottle. The bottom end of the connecting rod is thermally fused to the annular piston, and the top end of the connecting rod is snapped and fixed to the lifting rod. An insert block is integrally formed on the outer wall of the lifting rod. The bottle body has an internal interlayer for sliding the liquid blocking plate. The outer wall of the bottle body has a through-flow groove near the bottom. The outer wall of the bottle body has a sliding groove near the top that is connected to the through-flow groove. The top of the bottle body is fixedly attached to the bottle cap, which can be snapped onto the top surface of the cylinder. The liquid blocking plate slides within the interlayer, and the outer wall of the ring at the top is also fixed with an external protrusion that slides within the groove. A spring is provided above the ring of the liquid blocking plate that abuts against the bottom surface of the bottle cap. The bottom end of the round rod is thermally fused to the circular piston, and the top end of the round rod is provided with a threaded groove. The lower retaining ring is integrally formed with the round rod, and the upper retaining ring is threaded to the top end of the round rod. The distance between the upper retaining ring and the lifting rod is the same as the distance between the upper and lower walls of the liquid passage tank.

2. The intelligent marine sensor time response constant measurement device according to claim 1, characterized in that: The liquid extraction cylinder also includes a cylinder body that is snapped into the inside of the bracket. The circular piston slides on the inner wall of the cylinder body. The liquid extraction pipe and the liquid outlet pipe are both threaded to the bottom surface of the cylinder body. The top end of the liquid extraction pipe and the bottom end of the liquid outlet pipe are both provided with one-way liquid valves.

3. The intelligent marine sensor time response constant measurement device according to claim 2, characterized in that: The drive mechanism includes a support frame, a motor fixedly connected to the top surface of the support frame by bolts, a lead screw coaxially connected to the output shaft of the motor, a sliding plate threaded to the outside of the lead screw, a pair of sliding rods parallel to the lead screw, a fixing clamp welded to the outer wall of the support frame, and a disassembly clamp fixed to the fixing clamp by a pair of hand screws.

4. The intelligent marine sensor time response constant measurement device according to claim 3, characterized in that: The bottom end of the lead screw is rotatably connected to the middle partition of the support frame. The outer wall of the slide plate is provided with a slot that matches the insert block. The slide rod is snapped and fixed to the middle partition of the support frame. The slide plate is slidably connected to a pair of slide rods. After the fixing plate and the disassembly plate are fixed, the circular space in the center matches the size of the measuring cylinder.

5. A method for measuring the time response constant of an intelligent marine sensor, using the intelligent marine sensor time response constant measuring device as described in claim 4, characterized in that, Includes the following steps: S1. First, the operator places the tubular sensor into the inner test bottle of the measuring cylinder, ensuring that its bottom probe is reliably fixed below the sealing rubber ring. Then, the annular piston is moved above the limit ring, and the insert of the lifting rod is inserted into the slide slot of the drive mechanism. Next, the measuring cylinder is placed in the slot of the fixing plate and the hand screw is tightened so that the disassembly plate and the fixing plate together complete the clamping fixation of the measuring cylinder. Then, the top of the liquid extraction cylinder is passed through the round hole of the bracket and initially positioned using an interference fit. Finally, the upper retaining ring is tightened to the top of the round rod, thus completing the assembly of the entire device. S2. Next, place the fluid tank containing the initial liquid and the control liquid with specific parameters below the liquid collection tube and the liquid extraction tube respectively, and ensure that the openings of both tubes are completely submerged in the liquid. S3. Then, start the motor of the drive mechanism to drive the lead screw to rotate, which will cause the slide plate and the lifting rod to move upward. The lifting rod will drive the annular piston to move upward through the connecting rod, and the initial liquid will be drawn into the annular cavity of the cylinder through the liquid extraction tube. When the top surface of the lifting rod contacts the retaining ring above the liquid extraction cylinder, it will continue to move upward and drive the circular piston to move upward, and the comparison liquid will be drawn into the cylinder through the liquid extraction tube. S4. After that, the annular piston continues to move upward, and its top surface abuts against the outer protrusion of the liquid blocking plate, compressing the spring and pushing the liquid blocking plate to slide upward in the interlayer. The initial liquid then flows in through the liquid passage and fills the sealed space at the bottom of the bottle. After fully contacting the sensor probe, the sensor is turned on and connected to the data acquisition system to record its stable reading under the initial liquid environment. S5. After the sensor reading stabilizes, control the solenoid valve to switch the cylinder to connect with the drain pipe. Then control the motor to reverse, drive the lead screw to move the slide plate and lifting rod downward. The liquid blocking plate slides down first under the action of the spring reset force, blocking the liquid passage. The lifting rod continues to move down until its bottom surface abuts against the retaining ring below the liquid extraction cylinder. S6. As the lifting rod continues to move downward, the driving ring piston discharges the initial liquid in the cylinder through the drain pipe. At the same time, the driving circular piston forces the comparison liquid in the cylinder into the spray head through the outlet pipe. The comparison liquid is sprayed rapidly onto the sensor probe in the form of a jet, instantly replacing and displacing the residual initial liquid. The data acquisition system synchronously and at high speed records the complete dynamic response curve of the sensor from the moment it contacts the comparison liquid to the moment it reaches a new stable value. Based on the step response principle of a first-order system, the curve is nonlinearly fitted to calculate the time response constant of the sensor. S7. After the measurement experiment is completed, disassemble the equipment in the reverse order of S1, take out the sensor, clean the measuring cylinder, the liquid extraction cylinder and related flow paths with deionized water, and dry them for later use.

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