Stay wire displacement sensor testing device capable of simulating humid environment

Abstract

The utility model discloses a stay wire displacement sensor testing device capable of simulating a humid environment, which belongs to the technical field of underwater equipment testing and comprises a testing assembly, a humidifying assembly and a sealing cover, a sealed testing space is formed in the sealing cover, the testing assembly is arranged in the testing space, and the humidifying assembly is arranged in the testing space. The humidification assembly is connected with the test space and adjusts the humidity in the test space; the test assembly comprises an objective table, a lead screw assembly, a driving motor and a stay wire fixing frame, the objective table moves horizontally and linearly, the driving motor drives the objective table to move horizontally and linearly through the lead screw assembly, and the objective table is provided with a main body fixing frame used for fixing a stay wire sensor main body. The device not only has obvious advantages in the aspects of structure, precision, flexibility and test environment adaptability, but also greatly improves the test efficiency and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of underwater equipment testing technology, and in particular relates to a test device for a wire displacement sensor that can simulate a humid environment. Background Technology

[0002] Underwater observation equipment such as gliders and profiling buoys adjust their buoyancy by changing their own volume, thus achieving ascent and descent in seawater. These devices typically control their overall buoyancy by altering the volume of liquid or gas distributed within them, allowing them to rise or sink as needed. This buoyancy-based ascent and descent method enables the equipment to autonomously adjust its depth in the water, achieving precise underwater observation and data acquisition.

[0003] As a crucial component of the buoyancy drive system of underwater observation equipment, the wire-type displacement sensor reflects changes in the fuel level in the tank in real time by monitoring its voltage signal. With the increasing endurance of underwater observation equipment and the growing number of observable profiles, the role of the wire-type displacement sensor in the system becomes increasingly important. It can accurately track fuel level changes, helping to adjust the buoyancy of the equipment, thereby achieving more stable and precise lifting control. Since underwater observation missions typically require long-term, high-efficiency operation, higher demands are placed on the reliability of the wire-type displacement sensor to ensure its long-term stable operation in complex underwater environments, guaranteeing the normal operation of the equipment and the accuracy of data acquisition. The wire-type displacement sensor is mainly used to detect the fuel level in the buoyancy drive system of underwater observation equipment, and the accuracy of the detection has a significant impact on the accuracy of buoyancy adjustment. Therefore, a device is needed for cyclic reliability testing of the wire-type displacement sensor. Before formal assembly of the wire, a reliability test is performed first; only wire-type displacement sensors that pass the reliability test will be assembled into the corresponding buoyancy drive system.

[0004] Current testing methods for draw-wire displacement sensors have several drawbacks and limitations. Firstly, existing technologies often use calibration tools for simple calibration, but this method cannot simulate the oil return and discharge conditions of underwater observation equipment's buoyancy system during actual operation. This leads to test results that do not match actual usage conditions and cannot accurately reflect the sensor's performance and adaptability in underwater environments. Furthermore, existing testing methods lack reliability cyclic testing, failing to simulate the repeated operating conditions and extreme conditions experienced by draw-wire displacement sensors during long-term operation. This makes it impossible to comprehensively assess the sensor's stability and durability, affecting the judgment of its long-term reliability and accuracy. On the other hand, another commonly used testing method involves using a crank-connecting rod mechanism to drive one end of the draw-wire in reciprocating motion. While this can simulate certain motion states, the structure is complex, hindering operation and adjustment during actual testing, increasing the difficulty and inconvenience of the testing process. Therefore, existing testing methods have limitations in both reliability and operability, and urgently need improvement and optimization. Utility Model Content

[0005] To address the current problems in testing wire-type displacement sensors, such as the inability to simulate actual working conditions, lack of reliability cyclic testing, and complex and inconvenient test structures, this invention provides a wire-type displacement sensor testing device that can simulate a humid environment.

[0006] This invention is implemented as follows: a test device for a pull-wire displacement sensor that simulates a humid environment, characterized by comprising a test assembly, a humidification assembly, and a sealing cover. A sealed test space is formed within the sealing cover. The test assembly is disposed within the test space, and the humidification assembly is connected to the test space and adjusts the humidity within it. The test assembly includes a stage, a lead screw assembly, a drive motor, and a pull-wire fixing frame. The stage moves horizontally linearly, and the drive motor drives the stage to move horizontally linearly via the lead screw assembly. A main body fixing frame for fixing the pull-wire sensor body is provided on the stage.

[0007] In the above technical solution, preferably, the humidification assembly includes a power module, a humidity controller, a water tank, a humidification module, and a humidity sensor. The humidification module is installed in the water tank and communicates with the test space. The humidity sensor is set inside the sealed cover and is used to acquire humidity information in the test space. The humidity controller is connected to the humidity sensor and acquires humidity information. The humidity controller is connected to the humidification module and sends a control signal to the humidification module.

[0008] In the above technical solution, preferably, the humidification assembly includes a liquid level sensor, a water tank, a solenoid valve, a filter, and a check valve. The liquid level sensor is installed in the water tank and acquires the water level information in the water tank. The water tank is connected to the water tank through a water storage pipe. The solenoid valve, the filter, and the check valve are installed in the water storage pipe.

[0009] In the above technical solution, preferably, the test assembly is provided with two limit sensors for limiting the horizontal linear movement of the stage.

[0010] Compared with existing technologies, the wire displacement sensor testing device simulating a humid environment proposed in this application has several significant advantages and effects.

[0011] First, the device is characterized by its versatility. It can not only perform conventional displacement sensor tests, but also simulate working conditions under different environmental conditions, especially in humid environments, ensuring the reliability and accuracy of the wire sensor.

[0012] Secondly, the structure is simple. Compared with traditional devices that use a crank-connecting rod structure for wire pulling tests, this device uses a lead screw to replace the complex crank-connecting rod structure, making the overall device structure simpler and easier to maintain. The lead screw drive system not only improves the stability of the equipment but also reduces the system's complexity and failure rate. At the same time, the installation process is convenient; only the main body end and the lead-out end of the wire need to be installed to complete the assembly of the device, reducing the cumbersome installation steps of traditional devices and saving time and costs.

[0013] Higher testing accuracy is also a significant advantage of this device. By employing a lead screw structure and adjusting the motor speed and position through a PID control algorithm, precise displacement control can be achieved, with a control accuracy ranging from 0.1 mm / s to 2 mm / s, far exceeding the accuracy of traditional wire-drawing testing devices. This high-precision control makes the test results more reliable and can meet the testing requirements for higher precision.

[0014] In terms of application flexibility, the lead screw structure used in this device offers greater flexibility compared to existing testing equipment. Through the lead screw controller, users can adjust the return oil speed, set different circulation speeds and number of cycles according to different types of draw wires and actual application requirements. This adjustability allows the device to adapt to different types of draw wire sensor testing, better meeting the needs of various testing scenarios.

[0015] A wider range of testing conditions is also a prominent feature of this device. The integrated automatic humidity control module ensures constant humidity during testing, simulating various humid environments. This is crucial for the long-term stability testing of wire-type displacement sensors in humid conditions. Combined with a lead screw-controlled wire testing device, this device can perform reliability testing under various environmental conditions, thereby evaluating the sensor's performance under different humidity, temperature, and operating conditions.

[0016] In summary, this testing device not only has significant advantages in terms of structure, accuracy, flexibility, and adaptability to testing environments, but also greatly improves testing efficiency and reliability, meeting the sensor testing requirements under high precision, high stability, and multiple environmental conditions, and has broad application prospects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0020] Current testing methods for draw-wire displacement sensors suffer from problems such as inability to simulate actual working conditions, lack of reliability cyclic testing, and complex and inconvenient test structures. This invention provides a test device for draw-wire displacement sensors that can simulate a humid environment. To further illustrate the structure of this invention, a detailed description is provided below in conjunction with the accompanying drawings:

[0021] Please see Figure 1 and Figure 2 A test device for a draw-wire displacement sensor simulating a humid environment is disclosed, comprising a test assembly, a humidification assembly, and a sealing cover 1. This test device achieves simulated humid environment testing of the draw-wire displacement sensor through the coordinated action of the test assembly, humidification assembly, and sealing cover. The test assembly is used to mount the sensor under test and perform related displacement measurements; the humidification assembly is responsible for regulating the humidity within the test space to ensure humid conditions in the test environment; the sealing cover forms a sealed test space to prevent interference from external factors and ensure stable humidity and airtightness during the test process.

[0022] A sealed test space is formed inside the sealing cover. The transparent sealing cover structure can be designed with a double-layer composite material, with the outer layer made of polycarbonate (PC) to provide high impact resistance and high temperature resistance, ensuring external protection; and the inner layer made of acrylic (PMMA) to ensure clear observation during the test due to its excellent optical transparency and light transmittance.

[0023] The humidification assembly is connected to the test space and adjusts the humidity in the test space. In this embodiment, the humidification assembly specifically includes a power module 2, a humidity controller, a water tank 3, a humidification module 4, and a humidity sensor 5. The humidification module is installed in the water tank and communicates with the test space. The humidity sensor is set inside a sealed cover and is used to acquire humidity information in the test space. The humidity controller is connected to the humidity sensor and acquires humidity information. The humidity controller is also connected to the humidification module and sends control signals to the humidification module.

[0024] In this embodiment, the humidification assembly, connected to the test space, regulates the humidity within the test space to ensure the simulated humid test conditions. Specifically, the humidification assembly includes components such as a power module, a humidity controller, a water tank, a humidification module, and a humidity sensor. The humidification module is installed in the water tank and communicates with the test space, responsible for releasing water vapor into the test space to increase humidity. The humidity sensor is located inside a sealed enclosure, monitoring the humidity in the test space in real time and transmitting the measured humidity information to the humidity controller. The humidity controller is connected to the humidity sensor and can automatically adjust based on the humidity information fed back by the sensor. It also sends control signals to instruct the humidification module to operate, precisely regulating the humidity in the test space to ensure it is in the required humid state. This integrated system ensures humidity stability and meets the testing requirements of a simulated humid environment.

[0025] In this embodiment, the power supply module uses a DC-DC converter, such as the MeanWell HDR series, which provides a stable DC power supply to drive the humidity control system. The humidity controller is a PID controller or fuzzy controller, such as the Honeywell H6100, which can automatically adjust the humidity based on feedback from the humidity sensor. The humidification module uses an ultrasonic humidifier or a cold mist humidifier, such as the KETOTEK cold mist humidifier, which releases water mist through ultrasound or other technologies to increase the humidity of the space. The humidity sensor uses a capacitive humidity sensor or a thin-film resistive humidity sensor, such as the Honeywell HIH series, which has high accuracy and good stability, and can detect and provide feedback on the humidity information in the space in real time. The combination of these components enables precise adjustment and control of the humidity in the test space.

[0026] The humidification assembly also includes a liquid level sensor 6, a water tank 7, a solenoid valve 8, a filter 9, and a check valve. The liquid level sensor is installed in the water tank and obtains the water level information in the water tank. The water tank and the water tank are connected through a water storage pipe. The solenoid valve, the filter, and the check valve are installed in the water storage pipe.

[0027] The combined design of the liquid level sensor, water tank, solenoid valve, filter and check valve in the humidification assembly is mainly to ensure a stable and clean water supply for the humidification system and to prevent the water level from being too low or too high, thereby ensuring the normal operation of the humidification module.

[0028] Specifically, a level sensor is installed in the water storage tank to monitor the water level in real time. When the water level is too low, it can promptly trigger a water replenishment mechanism to ensure that there is enough water in the storage tank for the humidification module, preventing insufficient humidification due to water shortage. A water storage tank is connected to the storage tank via a storage pipe, serving as a backup water source to ensure the system can replenish water promptly when the water supply is insufficient, increasing the system's continuous operating capacity. A solenoid valve controls the opening and closing of the water flow, precisely regulating the water flow to ensure that there is no excessive or insufficient water flow. A filter is used to remove impurities from the water, ensuring the cleanliness of the water source and preventing impurities from entering the humidification module, thereby avoiding damage to the equipment or affecting the humidification effect. A one-way valve ensures unidirectional water flow, preventing water from flowing back into the system and ensuring normal water supply to the water source and humidification module.

[0029] The test assembly is located in the test space. The test assembly includes a stage 10, a lead screw assembly 11, a drive motor, and a wire-stayed bracket 12. The stage moves horizontally linearly, driven by the drive motor via the lead screw assembly. A main body bracket 13 is provided on the stage to secure the main body of the wire-stayed sensor. The test assembly is equipped with two limit sensors to restrict the horizontal linear movement of the stage.

[0030] The test assembly is designed to provide precise mechanical support and motion control for testing the draw-wire sensor. The horizontal linear movement of the stage is achieved through a lead screw assembly, a design that offers high stability and accuracy, ensuring precise linear movement of the stage within the horizontal plane. The lead screw assembly connects to a drive motor, which controls the stage's speed and direction of movement, thereby enabling precise adjustment and testing of the draw-wire sensor. A main support frame on the stage securely holds the draw-wire sensor, ensuring that its position does not shift or vibrate during testing, thus avoiding testing errors. Limit sensors limit the stage's travel distance, preventing it from exceeding predetermined ranges and ensuring safety and controllability during testing.

[0031] In the actual test, the drive motor drives the movement of the lead screw assembly, which in turn drives the movement of the platform that fixes the pull wire sensor, thereby causing the pull wire sensor to move left and right on the local pull wire. During this process, the free end of the pull wire sensor is fixed in the position of the pull wire fixing frame, thus changing the amount of tension of the pull wire.

[0032] Throughout the process, when the stage moves to the position of the switch sensor set inside the sealed cover, the switch sensor outputs a voltage signal to the lead screw controller, which in turn controls the lead screw assembly to reverse, thereby realizing the cyclic movement of the pull wire and simulating the actual working process of the pull wire.

[0033] Throughout the process, the voltage signal changes corresponding to the tension of the pull wire are recorded by computer software and converted into data signals. The reliability of the pull wire during actual operation is determined through data signal analysis. Compared to traditional pull wire reliability cyclic testing using displacement sensors and counting modules, this device employs an integrated controller to precisely control the number of test cycles. During the actual testing of the pull wire displacement sensor reliability cyclic testing device, a transparent sealed cover shields the support platform, providing limited space. Simultaneously, a humidity sensor installed in the center of the sealed cover reflects real-time humidity changes within the cover. The humidity signal voltage from the humidity sensor is fed back to the humidification module 5 in real-time. If the humidity decreases, the controller increases the power of the humidification module, raising the humidity level within the sealed cover and ensuring it remains above 95%. As the humidification module continuously sprays water, it consumes water from the storage tank. A liquid level sensor attached to the outer wall of the tank monitors the liquid level in real-time. The liquid level sensor consists of two parts, controlling the upper and lower limits of the liquid level in the tank. When the water level in the storage tank is continuously depleted to the lower limit, the lower limit level sensor outputs a voltage signal, which controls the solenoid valve to open via a relay. The solenoid valve is normally closed; when it opens, water from the reservoir enters the storage tank under gravity and internal positive pressure, replenishing the tank. When the water level rises to the upper limit, the upper limit level sensor outputs a voltage signal, which controls the solenoid valve to close again via a relay.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A test device for a draw wire displacement sensor that simulates a humid environment, characterized in that: The device includes a test assembly, a humidification assembly, and a sealing cover. A sealed test space is formed inside the sealing cover. The test assembly is disposed in the test space. The humidification assembly is connected to the test space and adjusts the humidity in the test space. The test assembly includes a stage, a lead screw assembly, a drive motor, and a wire fixing bracket. The stage moves horizontally linearly. The drive motor drives the stage to move horizontally linearly through the lead screw assembly. A main body fixing bracket for fixing the main body of the wire sensor is provided on the stage.

2. The wire displacement sensor testing device with simulated humid environment according to claim 1, characterized in that: The humidification assembly includes a power module, a humidity controller, a water tank, a humidification module, and a humidity sensor. The humidification module is installed in the water tank and communicates with the test space. The humidity sensor is located inside the sealed cover and is used to acquire humidity information in the test space. The humidity controller is connected to the humidity sensor and acquires humidity information. The humidity controller is connected to the humidification module and sends control signals to the humidification module.

3. The wire displacement sensor testing device with simulated humid environment according to claim 2, characterized in that: The humidification assembly includes a liquid level sensor, a water tank, a solenoid valve, a filter, and a check valve. The liquid level sensor is installed in the water tank and acquires the water level information in the water tank. The water tank is connected to the water tank through a water storage pipe. The solenoid valve, the filter, and the check valve are installed in the water storage pipe.

4. The wire displacement sensor testing device with simulated humid environment according to claim 1, characterized in that: The test assembly is equipped with two limit sensors for limiting the horizontal linear movement of the stage.

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