A pressure-to-displacement measuring device

Abstract

This utility model belongs to the field of displacement sensor technology, specifically relating to a pressure-to-displacement measuring device. It addresses the technical problems of existing hysteresis sensors having nonlinear errors and being difficult to install in space-constrained situations, as well as electronic ruler sensors being large and requiring ample space for installation. The technical solution of this utility model includes: a piston cylinder, a spring assembly, a load cell, a signal acquisition module, and a data processing unit. The piston cylinder includes a piston body and a cylinder body. One end of the piston body, located inside the cylinder body, is connected to one end of the spring assembly. The other end of the spring assembly is connected to the load cell. The output end of the load cell is connected to the signal acquisition module, and the signal acquisition module is connected to the data processing unit.

Description

Technical Field

[0001] This utility model belongs to the field of displacement sensor technology, specifically relating to a pressure-to-displacement measuring device. Background Technology

[0002] A displacement sensor is a device used to measure changes in the position of an object. It can accurately detect the amount of change in an object's position as it moves from one location to another. These sensors are widely used in various fields, including industrial automation, robotics, aerospace, and medical devices.

[0003] In the prior art, common displacement measurement sensors include hysteresis sensors, draw rope sensors, and electronic ruler sensors.

[0004] Hysteresis sensors: commonly used for long-distance, non-contact displacement measurement. They sense the position of an object by detecting changes in the magnetic field.

[0005] Wire rope sensor: Measures displacement by winding a wire rope, suitable for measuring a wide range of displacements.

[0006] Electronic ruler sensor: Utilizes optical, laser, or capacitance principles for measurement, offering high accuracy. Suitable for longer measurement ranges.

[0007] Existing technologies suffer from the following technical problems: hysteresis sensors exhibit nonlinear errors and are difficult to install in space-constrained environments; drawstring sensors suffer from accuracy issues due to rope tension and friction, and are prone to wear or breakage after prolonged use; electronic ruler sensors are bulky and have limited installation space. Therefore, there is an urgent need for a compact displacement measurement device that offers high accuracy and is wear-resistant, to meet the displacement measurement needs in confined spaces. Utility Model Content

[0008] To address the technical problems of existing hysteresis sensors having nonlinear errors and being difficult to install in space-constrained situations, and electronic ruler sensors being large in size and requiring a relatively spacious area for installation, this utility model provides a pressure-to-displacement measuring device.

[0009] The technical solution adopted in this utility model is as follows:

[0010] A pressure-to-displacement measuring device includes: a piston cylinder, a spring assembly, a load cell, a signal acquisition module, and a data processing unit. The piston cylinder includes a piston body and a piston cylinder body. One end of the piston body located inside the piston cylinder body is connected to one end of the spring assembly, and the other end of the spring assembly is connected to the load cell. The output end of the load cell is connected to the signal acquisition module, and the signal acquisition module is connected to the data processing unit.

[0011] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model provides a pressure-to-displacement measuring device with simple structure and high measurement accuracy. Pressure is converted into compressive force by a piston cylinder and a spring assembly. This force signal is then collected by a weighing sensor, transmitted to a data processing unit via a signal acquisition module, and combined with a preset force-to-displacement conversion model to ultimately achieve accurate displacement measurement.

[0012] Furthermore, the above also includes a preload mechanism for adjusting the initial pressure of the spring.

[0013] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model sets up a preload adjustment mechanism so that the spring assembly has a certain initial pressure when it is not subjected to external pressure, which can effectively avoid measurement errors caused by spring relaxation or system zero drift, improve the stability and accuracy of measurement, and also enhance the adaptability of the system.

[0014] Furthermore, the aforementioned preload mechanism includes an adjusting nut, the piston body includes a piston rod and a piston head, the adjusting nut passes through the piston rod, the outer surface of the adjusting nut is provided with threads, and it is rotatably mounted on the inner wall of the piston cylinder body through the threads, and the adjusting nut rotatably adjusts to push the piston head toward the spring assembly.

[0015] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model adopts a preload mechanism with an adjusting nut, and adjusts the initial compression of the spring by rotating the adjusting nut to push the piston head, thereby achieving precise control of the preload.

[0016] Furthermore, the above also includes a temperature compensation circuit, which is connected to the data processing unit.

[0017] The beneficial effects of this utility model by adopting the above technical solution are as follows: After introducing the temperature compensation circuit, this utility model can compensate for the performance fluctuations of the sensor and spring materials caused by changes in ambient temperature, thereby improving the reliability and consistency of the measurement results, and is especially suitable for working environments with large temperature differences.

[0018] Furthermore, the aforementioned temperature supplement circuit includes a temperature sensor and a heating element, both of which are connected to the data processing unit. The temperature sensor is located inside the piston cylinder body.

[0019] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model integrates a temperature sensor and a heating element to build a closed-loop constant temperature control system, which can monitor and maintain the internal temperature of the device within the set range in real time, further improving the measurement accuracy and long-term operational stability, and is particularly suitable for high-precision measurement applications.

[0020] Furthermore, the above also includes a wireless communication module, which is connected to the data processing unit.

[0021] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model adds a wireless communication module, which enables the measuring device to have remote data transmission capability, making it convenient to connect to a host computer or monitoring system, realize centralized data management and remote diagnosis, and improve the intelligence level and application flexibility of the system.

[0022] Furthermore, the communication interface in the aforementioned wireless communication module includes one or more of RS485, CAN, Wi-Fi, and Bluetooth.

[0023] By adopting the above technical solution, the beneficial effects of this utility model are as follows: This utility model configures multiple communication interfaces for the wireless communication module, enhancing its compatibility and applicability, and meeting the communication needs under different application scenarios.

[0024] Furthermore, the above also includes overload protection components.

[0025] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model is equipped with an overload protection component, which can respond in time when the piston is subjected to pressure exceeding the design range, prevent mechanical parts from being damaged due to overload, extend the service life of the device, and ensure the safe and reliable operation of the system.

[0026] Furthermore, the overload protection component described above includes a limit switch and an alarm module. The limit switch is disposed on the inner wall of the piston cylinder body and is disposed in the direction in which the piston body moves toward the spring assembly. The limit switch is connected to the alarm module.

[0027] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model, through the cooperation of limit switch and alarm module, triggers an alarm when the piston moves beyond the set limit position, reminding the operator to take measures to avoid equipment damage or safety accidents, thereby improving the safety and automation of the device.

[0028] Furthermore, the overload protection component described above also includes an elastic buffer pad, which is disposed on the inner wall of the piston cylinder body and in the direction in which the piston body moves toward the spring assembly. The limit switch is located between the piston body and the elastic buffer pad.

[0029] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model adds an elastic buffer pad in front of the limit switch, which can absorb part of the impact energy before the piston reaches the limit position, play a buffering role, reduce the direct impact on the limit switch and cylinder, thereby extending the life of key components and improving the overall impact resistance and stability of the system.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0031] 1. This utility model provides a pressure-to-displacement measuring device with a simple structure and high measurement accuracy. Pressure is converted into compressive force by a piston cylinder and a spring assembly. This force signal is then collected by a weighing sensor, transmitted to a data processing unit via a signal acquisition module, and combined with a preset force-to-displacement conversion model to ultimately achieve accurate displacement measurement.

[0032] 2. This utility model is equipped with a preload adjustment mechanism, which enables the spring assembly to have a certain initial pressure when it is not subjected to external pressure. This can effectively avoid measurement errors caused by spring relaxation or system zero-point drift, improve the stability and accuracy of measurement, and also enhance the adaptability of the system.

[0033] 3. This utility model integrates a temperature sensor and a heating element to construct a closed-loop constant temperature control system, which can monitor and maintain the internal temperature of the device within the set range in real time, further improving measurement accuracy and long-term operational stability, and is particularly suitable for high-precision measurement applications.

[0034] 4. This utility model adds a wireless communication module, enabling the measuring device to have remote data transmission capabilities, facilitating connection to a host computer or monitoring system, realizing centralized data management and remote diagnosis, and improving the system's intelligence level and application flexibility.

[0035] 5. This utility model adds an elastic buffer pad in front of the limit switch, which can absorb part of the impact energy before the piston reaches the limit position, play a buffering role, reduce the direct impact on the limit switch and cylinder, thereby extending the life of key components and improving the overall impact resistance and stability of the system. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort, wherein:

[0037] Figure 1This is a structural schematic diagram of a pressure-to-displacement measuring device according to Embodiment 1 of this utility model;

[0038] Figure 2 This is a schematic diagram of a pressure-to-displacement measuring device according to Embodiment 1 of this utility model.

[0039] Figure 3 This is a structural schematic diagram of the alarm module provided according to Embodiment 1 of this utility model.

[0040] Reference numerals in the attached drawings: 1. Piston cylinder body; 2. Piston head; 3. Piston rod; 4. Spring assembly; 5. Adjusting nut; 6. Weighing sensor; 7. Limit switch; 8. Elastic buffer pad. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0044] like Figures 1-3 As shown, this embodiment provides a pressure-to-displacement measuring device, including: a piston cylinder, a spring assembly 4, a weighing sensor 6, a signal acquisition module, and a data processing unit. The piston cylinder includes a piston body and a piston cylinder body 1. One end of the piston body located inside the piston cylinder body 1 is connected to one end of the spring assembly 4, and the other end of the spring assembly 4 is connected to the weighing sensor 6. The output end of the weighing sensor 6 is connected to the signal acquisition module, and the signal acquisition module is connected to the data processing unit.

[0045] In this embodiment, the data processing unit calculates the corresponding displacement value according to a preset force-displacement conversion model. This part is prior art and will not be described in detail in this utility model.

[0046] In summary, this utility model provides a pressure-to-displacement measuring device with a simple structure and high measurement accuracy. The pressure is converted into the compressive force of the spring assembly 4 by a piston cylinder, and then the force signal is collected by the weighing sensor 6. This force signal is transmitted to the data processing unit via the signal acquisition module, and combined with a preset force-to-displacement conversion model, ultimately achieving accurate displacement measurement.

[0047] Optionally, a preload mechanism for adjusting the initial pressure of the spring may also be included.

[0048] In summary, the present invention provides a preload adjustment mechanism, which ensures that the spring assembly 4 has a certain initial pressure when not subjected to external pressure. This effectively avoids measurement errors caused by spring slack or system zero-point drift, improves the stability and accuracy of the measurement, and enhances the adaptability of the system.

[0049] Optionally, the preload mechanism includes an adjusting nut 5. The piston body includes a piston rod 3 and a piston head 2. The adjusting nut 5 passes through the piston rod 3. The outer surface of the adjusting nut 5 is provided with threads. It is rotatably mounted on the inner wall of the piston cylinder body 1 through the threads. The adjusting nut 5 can rotatably adjust and push the piston head 2 to move toward the spring assembly 4.

[0050] In summary, this utility model adopts a preload mechanism with an adjusting nut 5. By rotating the adjusting nut 5 to push the piston head 2, the initial compression of the spring is adjusted, thereby achieving precise control of the preload.

[0051] Optionally, a temperature compensation circuit may also be included, which is connected to the data processing unit.

[0052] In summary, by introducing a temperature compensation circuit, this invention can compensate for fluctuations in the performance of sensor and spring materials caused by changes in ambient temperature, thereby improving the reliability and consistency of measurement results. It is especially suitable for working environments with large temperature differences.

[0053] Optionally, the temperature supplement circuit includes a temperature sensor and a heating element, both of which are connected to the data processing unit. The temperature sensor is located inside the piston cylinder body 1.

[0054] In this embodiment, the temperature sensor monitors the internal temperature of the device in real time. When the temperature is detected to be lower than the set threshold, the heating element is activated to maintain constant temperature control, thereby maintaining the measurement accuracy of the system.

[0055] In summary, this invention integrates a temperature sensor and a heating element to construct a closed-loop constant temperature control system, which can monitor and maintain the internal temperature of the device within a set range in real time, further improving measurement accuracy and long-term operational stability, and is particularly suitable for high-precision measurement applications.

[0056] Optionally, it may also include a wireless communication module, which is connected to the data processing unit.

[0057] In summary, this utility model adds a wireless communication module, enabling the measuring device to have remote data transmission capabilities, facilitating connection to a host computer or monitoring system, realizing centralized data management and remote diagnosis, and improving the system's intelligence level and application flexibility.

[0058] Optionally, the communication interface in the wireless communication module includes one or more of RS485, CAN, Wi-Fi, and Bluetooth.

[0059] In summary, this utility model provides a wireless communication module with multiple communication interfaces, enhancing its compatibility and applicability to meet the communication needs of different application scenarios.

[0060] Optionally, overload protection components may also be included.

[0061] In summary, this utility model is equipped with an overload protection component, which can respond promptly when the piston is subjected to pressure exceeding the design range, preventing mechanical parts from being damaged due to overload, extending the service life of the device, and ensuring the safe and reliable operation of the system.

[0062] Optionally, the overload protection component includes a limit switch 7 and an alarm module. The limit switch 7 is disposed on the inner wall of the piston cylinder body 1 and is disposed in the direction in which the piston body moves toward the spring assembly 4. The limit switch 7 is connected to the alarm module.

[0063] In summary, this utility model, through the cooperation of limit switch 7 and alarm module, triggers an alarm when the piston moves beyond the set limit position, reminding the operator to take measures to avoid equipment damage or safety accidents, thereby improving the safety and automation of the device.

[0064] Optionally, the overload protection component further includes an elastic buffer pad 8, which is disposed on the inner wall of the piston cylinder body 1 and in the direction in which the piston body moves toward the spring assembly 4. The limit switch 7 is located between the piston body and the elastic buffer pad 8.

[0065] In summary, the present invention adds an elastic buffer pad 8 in front of the limit switch 7, which can absorb part of the impact energy before the piston reaches the limit position, thus playing a buffering role, reducing the direct impact on the limit switch 7 and the cylinder, thereby extending the life of key components and improving the overall impact resistance and stability of the system.

[0066] Working principle

[0067] Pressure input and conversion:

[0068] External pressure acts on the piston body (including piston head 2 and piston rod 3), pushing piston head 2 into the piston cylinder, thereby compressing spring assembly 4. Spring assembly 4 converts the pressure into a measurable elastic deformation force.

[0069] Force signal acquisition:

[0070] The compressive force of the spring assembly 4 acts on the load cell 6, and the load cell 6 converts the force signal into an electrical signal output.

[0071] Signal processing and data conversion:

[0072] The signal acquisition module receives the electrical signal from the weighing sensor 6, and after amplification, filtering and other processing, transmits it to the data processing unit.

[0073] The data processing unit converts the measured force values ​​into corresponding displacement values ​​according to a pre-set force-displacement conversion model.

[0074] Temperature compensation mechanism:

[0075] The temperature sensor monitors the internal temperature of the device in real time. When the temperature is detected to be lower than the set threshold, the data processing unit controls the heating element to start and maintain a constant temperature, thereby avoiding the impact of material property fluctuations caused by temperature changes on the measurement results.

[0076] Remote communication function:

[0077] The data processing unit sends the measurement results to the host computer or monitoring platform through the wireless communication module (which supports multiple interfaces such as RS485, CAN, Wi-Fi, and Bluetooth) to achieve remote monitoring and data management.

[0078] Overload protection mechanism:

[0079] When the piston is subjected to pressure exceeding its design range, it continues to move towards the spring and approaches its limit position. Upon reaching the limit switch 7, the limit switch 7 triggers the alarm module to sound an alarm, alerting the operator to intervene promptly. Simultaneously, the elastic buffer pad 8 absorbs some of the impact energy, providing cushioning protection and preventing equipment damage.

[0080] Preload adjustment function:

[0081] By rotating the adjusting nut 5 to push the piston head 2, the initial compression of the spring assembly 4 can be adjusted, ensuring that the system has a certain initial tension when there is no external pressure, thereby improving measurement stability and zero-point accuracy.

[0082] Workflow

[0083] Pressure input stage: External pressure is applied to piston head 2; piston head 2 pushes spring assembly 4 to compress.

[0084] Force signal acquisition stage: The spring compression force acts on the weighing sensor 6; the weighing sensor 6 outputs the corresponding electrical signal.

[0085] Signal processing stage: The signal acquisition module processes the electrical signal; the data is transmitted to the data processing unit.

[0086] Data calculation stage: The data processing unit calls the preset force-displacement model and calculates the current displacement value.

[0087] Optional, also includes:

[0088] Temperature compensation stage: The temperature sensor detects the internal temperature; if the temperature is lower than the set value, the heating element is activated to maintain a constant temperature.

[0089] Optional, also includes:

[0090] Remote communication phase: The data processing unit uploads the measurement results via the wireless communication module; it supports multiple communication protocols, facilitating integration into the system network.

[0091] Optional, also includes:

[0092] Overload protection stage: The piston moves to the limit switch 7 position; the alarm module is triggered to issue an alarm; when it continues to move forward, the elastic buffer pad 8 absorbs the impact and protects the structure.

[0093] Optional, also includes:

[0094] Preload adjustment stage: Adjust the initial compression of the spring by rotating the adjusting nut 5; improve the stability and accuracy of the measurement system.

[0095] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions and improvements made by those skilled in the art within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A pressure-to-displacement measuring device, characterized in that include: The system comprises a piston cylinder, a spring assembly, a load cell, a signal acquisition module, and a data processing unit. The piston cylinder includes a piston body and a piston cylinder body. One end of the piston body located inside the piston cylinder body is connected to one end of the spring assembly. The other end of the spring assembly is connected to the load cell. The output end of the load cell is connected to the signal acquisition module, and the signal acquisition module is connected to the data processing unit.

2. A pressure-to-displacement measuring device according to claim 1, wherein It also includes a preload mechanism for adjusting the initial pressure of the spring.

3. A pressure-to-displacement measuring device according to claim 2, wherein The preload mechanism includes an adjusting nut. The piston body includes a piston rod and a piston head. The adjusting nut passes through the piston rod. The outer surface of the adjusting nut is threaded. It is rotatably mounted on the inner wall of the piston cylinder body through the thread. The adjusting nut can rotatably adjust and push the piston head toward the spring assembly.

4. A pressure-to-displacement measuring device according to claim 1, wherein It also includes a temperature compensation circuit, which is connected to the data processing unit.

5. The pressure-to-displacement measuring device according to claim 4, characterized in that, The temperature supplement circuit includes a temperature sensor and a heating element, both of which are connected to the data processing unit. The temperature sensor is located inside the piston cylinder body.

6. A pressure-to-displacement measuring device according to claim 1, wherein It also includes a wireless communication module, which is connected to the data processing unit.

7. A pressure-to-displacement measuring device according to claim 6, wherein The communication interface in the wireless communication module includes one or more of RS485, CAN, Wi-Fi, and Bluetooth.

8. A pressure-to-displacement measuring device according to claim 1, wherein, It also includes overload protection components.

9. A pressure-to-displacement measuring device according to claim 8, wherein, The overload protection component includes a limit switch and an alarm module. The limit switch is disposed on the inner wall of the piston cylinder body and is disposed in the direction in which the piston body moves toward the spring assembly. The limit switch is connected to the alarm module.

10. A pressure-to-displacement measuring device according to claim 9, characterized in that, The overload protection component also includes an elastic buffer pad, which is disposed on the inner wall of the piston cylinder body and in the direction in which the piston body moves toward the spring assembly. The limit switch is located between the piston body and the elastic buffer pad.

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