Hydraulic oil pressure pulsation measuring device, control method, and hydraulic system

Abstract

The hydraulic oil pressure pulsation measuring device, the control method and the hydraulic system provided by the present disclosure relate to the technical field of hydraulic systems, and the hydraulic oil pressure pulsation measuring device comprises an oil inlet pipe, a volume tank, a throttle valve, an adjusting assembly and a pulsation measuring sensor assembly. The inlet of the oil inlet pipe is used for introducing hydraulic oil to be measured. The oil inlet of the volume tank is in communication with the outlet of the oil inlet pipe. The throttle valve is arranged between the oil inlet pipe and the volume tank. The adjusting assembly is arranged in cooperation with the throttle valve, and the action of the adjusting assembly changes the opening degree of the throttle valve. The pulsation measuring sensor assembly is arranged in the oil inlet pipe. The adjusting assembly is configured to dynamically adjust the action of the adjusting assembly during the hydraulic oil pressure pulsation measurement, so as to make the hydraulic oil pulsation in the oil inlet pipe non-reflective by changing the opening degree of the throttle valve. The device is simple, practical, small in size and capable of realizing the function of non-reflection of the pipeline hydraulic oil pulsation and accurately collecting the pressure pulsation of the hydraulic oil.

Description

Technical Field

[0001] This disclosure belongs to the field of hydraulic system technology, specifically relating to a hydraulic oil pressure pulsation measuring device, control method, and hydraulic system. Background Technology

[0002] In hydraulic systems, the hydraulic oil in the hydraulic lines will experience pressure pulsations. Accurate measurement of these pressure pulsations is necessary for condition monitoring, fault diagnosis, and performance optimization of the hydraulic system.

[0003] Pressure pulsations in hydraulic oil propagate along hydraulic lines in the form of waves. When these waves reach specific locations on hydraulic components, such as the ends of the lines, the impedance changes due to the sudden increase in the outlet area, resulting in reflected waves. The superposition of the incident and reflected waves distorts the pressure pulsation data measured by pressure pulsation sensors placed at these specific locations on hydraulic components, failing to accurately reflect the true pulsation characteristics of the hydraulic components. To obtain accurate measurement results, a reflection-free system is required.

[0004] There is currently no hydraulic oil pressure pulsation measurement device with anti-reflection function designed for special locations of hydraulic components such as the end of hydraulic pipelines.

[0005] A related technology discloses an acoustic wave non-reflection device made of periodically stacked silicone materials with varying air contents, which can absorb ultrasonic waves in air through acoustic impedance matching. However, this device is not suitable for hydraulic pipelines with hydraulic oil flow, and its application faces the following technical challenges: 1) The above device is suitable for the non-reflective characteristics of sound waves in the still air domain, while hydraulic oil does not have the non-reflective characteristics of acoustic disturbances. 2) The above-mentioned device is too large and is not suitable for use in the limited space of a hydraulic system; 3) For flowing media, in order to achieve non-reflection, the impedance needs to change with the flow velocity, and it is extremely inconvenient to adjust the material distribution parameters multiple times; 4) The above-mentioned acoustic non-reflective materials are mainly for the ultrasonic frequency band. For pressure pulsations below 20,000 Hz that are common in hydraulic systems, it is difficult to achieve non-reflection and the effect is not good.

[0006] In summary, the relevant technologies lack a compact hydraulic oil pressure pulsation measuring device that can be effectively applied to hydraulic pipelines and adaptable to different working conditions, thus making it impossible to accurately measure hydraulic oil pressure pulsation. Summary of the Invention

[0007] This disclosure provides a hydraulic oil pressure pulsation measuring device, control method, and hydraulic system, aiming to at least partially solve the technical problem of inaccurate hydraulic oil pressure pulsation measurement at special locations such as the end of hydraulic pipelines in related technologies.

[0008] At least one embodiment of this disclosure provides a hydraulic oil pressure pulsation measuring device, comprising: an oil inlet pipe, the inlet of which is used to introduce hydraulic oil to be measured; a volumetric tank, the inlet of which is connected to the outlet of the oil inlet pipe; a throttle valve disposed between the oil inlet pipe and the volumetric tank; an adjusting component cooperating with the throttle valve, wherein the action of the adjusting component changes the opening degree of the throttle valve; and a pulsation measuring sensor assembly disposed in the oil inlet pipe; wherein the adjusting component is configured to: dynamically adjust the action of the adjusting component during the hydraulic oil pressure pulsation measurement process, so as to make the hydraulic oil pulsation in the oil inlet pipe reflectless by changing the opening degree of the throttle valve.

[0009] The above solution offers the following technical advantages: Addressing the inaccurate measurement of hydraulic oil pressure pulsation at specific locations such as the end of hydraulic pipelines in related technologies, a simple, practical, and compact hydraulic oil pressure pulsation measurement device is proposed, capable of achieving reflection-free measurement of hydraulic oil pulsation in pipelines. This device dynamically controls the opening of the throttle valve to achieve a reflection-free boundary, thereby accurately capturing the pulsation of hydraulic oil. By setting up an adjustment component in conjunction with the throttle valve and dynamically controlling the throttle valve opening during measurement, the device actively constructs a reflection-free boundary based on real-time operating conditions. This effectively overcomes pressure wave reflection caused by impedance mismatch in related technologies, eliminates the interference of standing waves on pressure pulsation measurement, and ensures that only traveling waves propagate within the inlet pipe. Because the influence of reflected waves is eliminated, the pulsation measurement sensor component can capture the true hydraulic oil pressure pulsation, solving the technical problem of inaccurate pressure pulsation measurement of hydraulic components such as hydraulic pumps. This device plays an indispensable role in accurately measuring hydraulic oil pulsation. It can adapt to different flow characteristics to form a non-reflective boundary and can adapt to changes in different flow rates and operating conditions. Through dynamic adjustment, it can always maintain a non-reflective state. Compared with non-reflective devices with fixed structures, it has a wider working range and better robustness, and is easy to control. It has wide application value in engineering measurement.

[0010] The hydraulic oil pressure pulsation measuring device provided in at least one embodiment of this disclosure further includes: a front end plate, which is fixedly connected to the oil inlet pipe and is used to fix and support the oil inlet pipe and to seal the oil inlet of the volumetric tank; an oil passage plate, which is disposed inside the volumetric tank and is provided with an oil passage hole for the hydraulic oil to pass through and a mating hole for the adjusting component to pass through and move; and a rear end plate, which is disposed at the oil outlet of the volumetric tank and is used to seal the oil outlet of the volumetric tank.

[0011] The above solution has the following technical effects: the coordinated arrangement of the front end plate, the oil passage plate and the rear end plate not only achieves a stable connection and seal between the oil inlet pipe and the volume box, preventing high-pressure hydraulic oil leakage, but also guides and supports the adjustment components through the oil passage plate, ensuring the structural stability of the device under high pressure environment.

[0012] The hydraulic oil pressure pulsation measuring device provided in at least one embodiment of this disclosure further includes: a servo motor, the servo motor being connected to the adjustment component, and the servo motor being used to drive the action of the adjustment component.

[0013] The above solution offers the following technical advantages: it utilizes a servo motor-driven adjustment component, replacing the traditional manual adjustment method. The servo motor boasts a fast response speed and high control precision, enabling it to quickly track flow changes and accurately adjust the throttle valve opening; simultaneously, it eliminates the safety risks associated with manual operation near high-pressure pipelines.

[0014] In the hydraulic oil pressure pulsation measuring device provided in at least one embodiment of this disclosure, the adjusting component includes: a threaded tapered rod, the threaded tapered rod moving axially along the oil inlet pipe, and a conical valve core provided at one end of the threaded tapered rod, the conical valve core and the outlet of the oil inlet pipe forming the throttle valve, the threaded tapered rod having a thread in the axial direction for helical transmission to achieve movement.

[0015] The above solution offers the following technical advantages: the conical valve core design effectively reduces fluid disturbance as it flows through the throttling orifice, minimizing the interference of flow-induced noise on pressure pulsation measurements. Axial movement is achieved through threaded transmission, which, combined with the conical valve core, reduces the sensitivity of the throttling valve's flow area to the displacement of the threaded conical rod, facilitating precise opening adjustment.

[0016] In the hydraulic oil pressure pulsation measuring device provided in at least one embodiment of this disclosure, the pulsation measuring sensor assembly includes: a plurality of pulsation pressure sensors, which are sequentially arranged along the axis of the oil inlet pipe to detect hydraulic oil pulsation in the oil inlet pipe, and verify that there is no reflection of hydraulic oil pulsation in the oil inlet pipe when the amplitudes of the plurality of pulsation pressure sensors are consistent by comparing the amplitudes of the plurality of pulsation pressure sensors.

[0017] The above solution offers the following technical advantages: by setting up multiple pulsating pressure sensors, the amplitude of pressure pulsations at different locations can be compared. When the amplitudes are consistent, the achievement of the non-reflective boundary condition is directly verified, ensuring the reliability of the measurement data.

[0018] In the hydraulic oil pressure pulsation measuring device provided in at least one embodiment of this disclosure, the pulsation measuring sensor assembly further includes at least one conventional pressure sensor, which is disposed in the oil inlet pipe and is used to monitor the pressure loss of the hydraulic oil during the process of the regulating assembly adjusting the opening of the throttle valve.

[0019] The above solution has the following technical effects: setting up a conventional pressure sensor to monitor pressure loss can not only help calculate flow rate and pressure difference, but also monitor the operating status of the device and prevent system abnormalities caused by excessive throttling.

[0020] At least one embodiment of this disclosure also provides a control method for a hydraulic oil pressure pulsation measuring device, comprising: dynamically adjusting the action of the adjustment component during the hydraulic oil pressure pulsation measurement process, so as to make the hydraulic oil pulsation in the oil inlet pipe reflectless by changing the opening of the throttle valve; and, when the hydraulic oil pulsation in the oil inlet pipe reflectsless, collecting the pressure pulsation of the hydraulic oil through a pulsation measuring sensor component.

[0021] The above solution has the following technical effects: it avoids measurement interference caused by pulsation reflection at the measurement process level, and effectively improves the accuracy of pressure pulsation measurement results.

[0022] In at least one embodiment of the method provided in this disclosure, the dynamic adjustment of the operation of the adjustment component includes: acquiring the actual flow rate of hydraulic oil currently entering the inlet pipe and the actual pressure difference between the inlet end and the outlet end of the throttle valve; determining, based on the actual flow rate of the hydraulic oil, a desired pressure difference corresponding to the throttle valve used to prevent reflection of hydraulic oil pulsation in the inlet pipe; controlling the operation of the adjustment component based on the comparison result between the actual pressure difference and the desired pressure difference to change the opening degree of the throttle valve; monitoring the deviation between the actual pressure difference and the desired pressure difference during the operation of the adjustment component; and determining that the hydraulic oil pulsation in the inlet pipe is unreflected and stopping the operation of the adjustment component when the deviation between the actual pressure difference and the desired pressure difference is less than a preset tolerance.

[0023] The above solution offers the following technical advantages: It establishes a complete closed-loop control strategy, including acquiring flow rate, calculating the desired pressure difference, comparing the actual pressure difference, and adjusting the opening. By monitoring the deviation between the actual and desired pressure differences in real time and using this to control the action of the regulating components, the non-reflective operating point can be quickly and accurately located.

[0024] In at least one embodiment of the method provided in this disclosure, controlling the operation of the regulating component based on the comparison result of the actual pressure difference and the expected pressure difference includes: controlling the regulating component to decrease the opening of the throttle valve in response to the actual pressure difference being less than the expected pressure difference; and controlling the regulating component to increase the opening of the throttle valve in response to the actual pressure difference being greater than the expected pressure difference; and, the pulsation measurement sensor assembly includes a plurality of pulsation pressure sensors, and the method further includes: acquiring the amplitude of the plurality of pulsation pressure sensors; comparing the amplitude of the plurality of pulsation pressure sensors; and, in response to the amplitude of the plurality of pulsation pressure sensors being consistent, determining that the hydraulic oil pulsation in the inlet pipe is unreflected and that the pressure pulsation of the hydraulic oil collected by the pulsation measurement sensor assembly is valid.

[0025] The above solution has the following technical effects: it clarifies the control logic of reducing the opening when the pressure difference is small and increasing the opening when the pressure difference is large, as well as the steps of using the sensor amplitude consistency for final verification, making the implementation process of the non-reflective function simple, practical, and easy to program in the controller.

[0026] At least one embodiment of this disclosure also provides a hydraulic system including a hydraulic oil pressure pulsation measuring device as provided in any embodiment of this disclosure.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the structure of a hydraulic oil pressure pulsation measuring device provided for at least one embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of an adjustment component provided in at least one embodiment of the present disclosure; Figure 3 A schematic diagram of the key dimensions of a conical valve core provided for at least one embodiment of this disclosure; Figure 4 A schematic diagram showing the layout of a pulsation measurement sensor assembly provided in at least one embodiment of this disclosure; Figure 5 A schematic diagram of another hydraulic oil pressure pulsation measuring device provided for at least one embodiment of this disclosure; Figure 6 A schematic diagram of the composition of another hydraulic oil pressure pulsation measuring device provided for at least one embodiment of the present disclosure; Figure 7 A flowchart of a control method for a hydraulic oil pressure pulsation measuring device provided for at least one embodiment of this disclosure; Figure 8 A flowchart of a control scheme for an adjustment component provided in at least one embodiment of this disclosure; Figure 9 Flowchart of another hydraulic oil pressure pulsation measuring device control method provided for at least one embodiment of this disclosure; Figure 10 Example flowchart of a control method for a hydraulic oil pressure pulsation measuring device provided in at least one embodiment of this disclosure; Figure 11 A schematic diagram of the composition of a hydraulic system provided for at least one embodiment of this disclosure; Figure 12 A schematic diagram illustrating the composition of an example hydraulic system provided for at least one embodiment of this disclosure; Figure 13 for Figure 12 The example of a hydraulic system provides a comparison chart of pressure pulsations obtained from two pulsating pressure sensors.

[0030] Figure label: 1- Oil inlet pipe; 2- Volumetric tank; 3- Throttling valve; 4- Adjustment assembly; 5- Pulsation measurement sensor assembly; 6- Front end plate; 7- Oil passage plate; 8- Rear end plate; 9- Servo motor; 10- Fixing and shaft connection device; 41- Threaded tapered rod; 41a- Conical valve core; 51- Pulsation pressure sensor; 52- Conventional pressure sensor; 100- Hydraulic system; 101- Hydraulic oil pressure pulsation measurement device; 102- Flow sensor; 103- Load proportional valve; 104- Oil tank; 105- Motor; 106- Hydraulic pump; 107- Safety valve; d - The diameter of the conical valve core; h - Valve height of the conical valve core. Detailed Implementation

[0031] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the disclosure. Similarly, the following embodiments are only some, not all, embodiments of the present disclosure, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0032] The terms "first," "second," and "third" used in the embodiments of this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," and "third" may explicitly or implicitly include at least one of that feature.

[0033] In the description of this disclosure, "multiple" means at least two, such as two or three, unless otherwise expressly and specifically limited.

[0034] In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] The terms “comprising” and “having”, and any variations thereof, used in this disclosure are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to such processes, methods, products, or devices.

[0036] The term "hydraulic component" in this disclosure includes, but is not limited to, a hydraulic pump or a hydraulic motor.

[0037] In the embodiments of this disclosure, the term "no reflection" means that only incident waves are transmitted and no reflected waves are generated, that is, only traveling waves are transmitted in the hydraulic pipeline and there are no reflected waves (also known as standing waves).

[0038] The term "reflected wave" in this embodiment primarily refers to reflected waves generated by impedance mismatch. In a finite-length straight pipe, sound wave propagation will result in reflection at the pipe end. This is mainly attributed to the sudden increase in cross-sectional area at the outlet, which causes a change in acoustic impedance, thereby triggering sound wave reflection. If the pipe is infinitely long or if the hydraulic oil pressure pulsation measuring device (without a reflection device) of this disclosure is installed at the rear end of the pipe, it can be ensured that no reflected waves are generated in the front end of the pipe, and only traveling waves propagate.

[0039] The term "height-to-diameter ratio of the conical valve core" in the embodiments of this disclosure refers to the height of the conical valve core. hWith the diameter of the conical valve core d The ratio of .

[0040] To address the technical problem of inaccurate hydraulic oil pressure pulsation measurement at special locations such as the end of hydraulic pipelines in related technologies, this disclosure proposes a simple, practical, compact hydraulic oil pressure pulsation measurement device capable of achieving reflection-free hydraulic oil pulsation measurement. This device dynamically controls the opening of the throttle valve to achieve a reflection-free boundary, thereby accurately acquiring hydraulic oil pulsation. By setting up an adjustment component in conjunction with the throttle valve and dynamically controlling the throttle valve opening during measurement, this device can actively construct a reflection-free boundary based on real-time operating conditions. This effectively overcomes pressure wave reflection caused by impedance mismatch in related technologies, eliminates the interference of standing waves on pressure pulsation measurement, and ensures that only traveling waves propagate within the inlet pipe. Because the influence of reflected waves is eliminated, the pulsation measurement sensor component can acquire the true hydraulic oil pressure pulsation, solving the technical problem of inaccurate pressure pulsation measurement of hydraulic components such as hydraulic pumps. This disclosed device plays an indispensable role in accurately measuring hydraulic oil pulsation. It can adapt to different flow characteristics to form a non-reflective boundary and can adapt to changes in different flow rates and operating conditions. Through dynamic adjustment, it can always maintain a non-reflective state. Compared with non-reflective devices with fixed structures, it has a wider working range and better robustness, and is easy to control. It has wide application value in engineering measurement.

[0041] Based on this, the device disclosed herein can automatically adjust the opening of the throttle valve according to the actual flow rate entering the oil inlet pipe to achieve a reflection-free boundary, which is easy to control and can better adapt to different flow rate changes.

[0042] Based on this, the throttle valve of the device disclosed herein adopts a conical valve core, which reduces fluid disturbance, avoids the influence of flow-induced noise on the measurement results, improves the control accuracy of the non-reflection boundary, and thus improves the measurement accuracy of hydraulic oil pressure pulsation.

[0043] Based on this, the throttle valve of the disclosed device has a large height-to-diameter ratio, which reduces the sensitivity of the flow area of ​​the throttle valve to the distance of the threaded tapered rod, further improves the control accuracy of the non-reflective boundary, and thus improves the measurement accuracy of hydraulic oil pressure pulsation.

[0044] Based on this, the movement of the threaded tapered rod of the device disclosed herein is achieved by the rotation of a servo motor, eliminating the need for manual operation and thus eliminating safety hazards.

[0045] Figure 1 This is a schematic diagram of a hydraulic oil pressure pulsation measuring device (also known as a non-reflective device) provided for at least one embodiment of this disclosure. This device, as a non-reflective device for hydraulic pipelines, can be used in any hydraulic system, especially in areas where pressure pulsation measurement of hydraulic components is inaccurate. Figure 1 As shown, the hydraulic oil pressure pulsation measuring device includes an oil inlet pipe 1, a volumetric tank 2, a throttle valve 3, an adjustment assembly 4, and a pulsation measuring sensor assembly 5.

[0046] The inlet of oil inlet pipe 1 is used to introduce the hydraulic oil (also known as pulsating hydraulic oil) to be measured.

[0047] The oil inlet of the volumetric tank 2 is connected to the outlet of the oil inlet pipe 1.

[0048] Throttling valve 3 is located between oil inlet pipe 1 and volumetric tank 2.

[0049] The regulating component 4 is configured to work in conjunction with the throttle valve, and the action of the regulating component 4 changes the opening degree of the throttle valve 3.

[0050] The pulsation measurement sensor assembly 5 is installed in the oil inlet pipe 1.

[0051] The regulating component 4 is configured to dynamically adjust the action of the regulating component 4 during the hydraulic oil pressure pulsation measurement process, so as to make the hydraulic oil pulsation in the oil inlet pipe 1 reflective by changing the opening of the throttle valve 3.

[0052] It should be noted that the adjustment of the adjustment component 4 can be automatic or manual. There are various conditions for determining that the hydraulic oil pulsation in the oil inlet pipe 1 is unreflected, including but not limited to the schemes described in the following embodiments. It can be that the amplitude of multiple pulsation pressure sensors in the pulsation measurement sensor component 5 is consistent to verify that the hydraulic oil pulsation in the oil inlet pipe 1 is unreflected, or it can be that the deviation between the actual pressure difference between the inlet end and the outlet end of the throttle valve 3 and the expected pressure difference is less than the preset tolerance.

[0053] During implementation, the hydraulic oil to be measured is introduced into the oil inlet pipe 1. By adjusting the component 4, the opening of the throttle valve 3 is changed to achieve the function of no reflection in the oil inlet pipe 1 and even the front end of the oil inlet pipe 1. The hydraulic oil flows through the throttle valve 3 into the volume box 2, and can then enter the subsequent hydraulic pipeline through the volume box 2 again.

[0054] Some embodiments of this disclosure also provide control methods and hydraulic systems corresponding to the systems described above.

[0055] The method provided by at least one embodiment of this disclosure is applicable to hydraulic system applications where pressure pulsation measurement of any existing hydraulic component is inaccurate. For example, in applications with strict requirements for internal space, such as the travel hydraulic circuit of construction machinery and the working oil circuit of vehicle-mounted hydraulic systems, traditional large-volume pulsation measurement devices not only require additional installation space but also significant modifications to existing pipelines. This can easily introduce unnecessary pressure interference due to additional pipeline joints and extended pipelines, further reducing the accuracy of the measurement results. The method and device of this embodiment can rely on an integrated, small structure to directly connect to existing hydraulic pipelines to complete the measurement without large-scale modifications to the original system layout. This satisfies the installation requirements of confined spaces while ensuring the accuracy of pulsation measurement, thus adapting to the measurement needs of hydraulic systems in such limited spaces.

[0056] In some embodiments, the regulating component 4 can be controlled by its built-in control unit or by an additional controller (such as a hydraulic system controller). The control unit or controller is used to control the regulating component 4 to perform the steps of any of the following method embodiments to ensure the accuracy of pressure pulsation measurement.

[0057] Figure 2 This is a schematic diagram of the structure of an adjustment component provided in at least one embodiment of the present disclosure. Figure 1 Based on the proposed solution, in order to achieve higher adjustment accuracy for the adjustment components, such as... Figure 2 As shown, the regulating component 4 includes at least a threaded conical rod 41, which moves axially along the oil inlet pipe 1. One end of the threaded conical rod 41 is provided with a conical valve core 41a. This conical valve core 41a (also referred to as the beginning end of the threaded conical rod 41) and the outlet of the oil inlet pipe 1 (also referred to as the end end of the oil inlet pipe 1) form a throttle valve 3. The threaded conical rod 41 has threads along its axial direction for helical transmission to achieve movement. The conical valve core 41a of the threaded conical rod 41 is designed to effectively reduce disturbances when fluid flows through the throttle orifice, reducing the interference of flow-induced noise on pressure pulsation measurement. Axial movement is achieved through threaded transmission, and the conical valve core 41a reduces the sensitivity of the flow area of ​​the throttle valve 3 to the displacement of the threaded conical rod 41, facilitating precise opening adjustment and making it easier to stabilize at the desired pressure differential.

[0058] Figure 3 A schematic diagram showing the key dimensions of a conical valve core provided for at least one embodiment of this disclosure. Figure 2 Based on the existing scheme, in order to achieve higher adjustment accuracy for the threaded tapered rod, such as... Figure 3 As shown, the height-to-diameter ratio of the conical valve core (the height of the conical valve core) h With the diameter of the conical valve core dThe ratio of the height to the diameter of the conical valve core is greater than the set value, which reduces the sensitivity of the flow area of ​​the throttle valve 3 to the distance adjustment of the threaded conical rod 41. Specifically, by increasing the height-to-diameter ratio, the change in the flow area of ​​the throttle valve 3 per unit stroke of the threaded conical rod 41 is smaller. Therefore, when finely adjusting the opening of the throttle valve 3, the actual pressure difference of the throttle valve 3 can be more accurately controlled within the required measurement range, avoiding problems such as excessive opening changes or pressure differences deviating from the expected pressure difference due to stroke fine adjustments. This effectively improves the stability of the pressure pulsation measurement process and the accuracy of the final measurement result. At the same time, changing the height-to-diameter ratio of the conical valve core does not increase the volume of the conical valve core and the entire adjustment assembly, and does not affect the miniaturized design of the device. It can better adapt to the limited installation space in the hydraulic system and meet the pressure pulsation measurement needs in confined spaces.

[0059] Figure 4 This is a schematic diagram illustrating the layout of a pulsation measurement sensor assembly provided in at least one embodiment of this disclosure. Figures 1-3 Based on any given scheme, to enhance the reliability of the measured hydraulic oil pressure pulsations, such as... Figure 4 As shown, the pulsation measurement sensor assembly 5 includes multiple pulsation pressure sensors 51 (also known as high-frequency pressure sensors). Figure 4 Only two are shown as examples. Multiple pulsating pressure sensors 51 are sequentially arranged along the axis of the inlet pipe 1 to detect hydraulic oil pulsations within the inlet pipe 1. By comparing the amplitudes of the multiple pulsating pressure sensors 51, the absence of reflection in the hydraulic oil pulsations within the inlet pipe 1 is verified when the amplitudes of the multiple pulsating pressure sensors 51 are consistent. This scheme achieves a self-verification function; by setting multiple pulsating pressure sensors 51, the amplitudes of pressure pulsations at different locations can be compared. When the amplitudes are consistent, the achievement of the no-reflection boundary condition is directly verified, ensuring the reliability of the measured hydraulic oil pressure pulsations.

[0060] In the above scheme, the sampling rate of the pulsating pressure sensor 51 is higher than the set frequency, which ensures complete capture of the high-frequency fluctuation details of hydraulic oil pressure pulsation. This prevents the loss of high-frequency pulsation characteristics due to the limitations of the Nyquist sampling law and avoids waveform aliasing distortion. The higher sampling rate can accurately reproduce the instantaneous change process of pressure pulsation, providing a sufficiently accurate data basis for amplitude comparison between multiple sensors, thereby improving the accuracy of the verification results for non-reflective boundary conditions.

[0061] In some embodiments, to prevent malfunctions of the hydraulic oil pressure pulsation measuring device, such as Figure 1 and Figure 4 As shown, the pulsation measurement sensor assembly 5 also includes at least one conventional pressure sensor 52 (also known as a common pressure sensor). Figure 4Only one example is shown. A conventional pressure sensor 52 is also installed in the oil inlet pipe 1 to monitor the pressure loss of the hydraulic oil during the process of adjusting the opening of the throttle valve 3 by the regulating component 4. This design improves the monitoring function of the hydraulic oil pressure pulsation measuring device. The conventional pressure sensor 52, used to monitor pressure loss, not only assists in calculating flow rate and differential pressure but also monitors the device's operating status, preventing malfunctions in the hydraulic oil pressure pulsation measuring device due to excessive throttling.

[0062] In the above solution, the sampling frequency of the conventional pressure sensor 52 is lower than that of the pulsating pressure sensor 51. Therefore, data acquisition can be completed without the need for high-frequency acquisition hardware, thus avoiding excessive hardware costs and data processing burdens on the device. Furthermore, the conventional pressure sensor 52 is lower in cost and more stable than the pulsating pressure sensor 51. Only a small number of conventional pressure sensors 52 are needed to achieve pressure loss monitoring, without increasing the overall size of the device, making it suitable for most hydraulic systems with limited installation space.

[0063] Figure 5 A schematic diagram illustrating the composition of another hydraulic oil pressure pulsation measuring device provided for at least one embodiment of this disclosure. Figures 1-4 Based on any one of the solutions, in order to improve the structural stability of the hydraulic oil pressure pulsation measuring device to make it suitable for harsh environments, such as Figure 5 As shown, the hydraulic oil pressure pulsation measuring device also includes a front end plate 6, an oil passage plate 7, and a rear end plate 8.

[0064] The front end plate 6 is fixedly connected to the oil inlet pipe 1, and the front end plate 6 is used to fix and support the oil inlet pipe 1 and to seal the oil inlet of the volume box 2.

[0065] The oil passage plate 7 is located inside the volume box 2, and the oil passage plate 7 is provided with an oil passage hole for hydraulic oil to pass through and a mating hole for the adjustment component 4 to pass through and move.

[0066] The rear end plate 8 is located at the oil outlet of the volumetric tank 2, and the rear end plate 8 is used to seal the oil outlet of the volumetric tank 2.

[0067] The coordinated arrangement of the front end plate 6, the oil passage plate 7, and the rear end plate 8 not only achieves a stable connection and seal between the oil inlet pipe 1 and the volume box 2, preventing high-pressure hydraulic oil leakage, but also guides and supports the adjustment component 4 through the oil passage plate 7, ensuring the structural stability of the hydraulic oil pressure pulsation measuring device under high pressure.

[0068] Figure 6 This is a schematic diagram illustrating the composition of yet another hydraulic oil pressure pulsation measuring device provided for at least one embodiment of this disclosure. Figures 1-5Based on any one of the solutions, in order to improve the response speed of the hydraulic oil pressure pulsation measuring device, such as Figure 6 As shown, the hydraulic oil pressure pulsation measuring device also includes a servo motor 9. The servo motor 9 is connected to the regulating component 4 and is used to drive the movement of the regulating component 4. The use of a servo motor 9 to drive the regulating component 4 replaces the traditional manual adjustment method. The servo motor offers fast response and high control precision, enabling it to quickly track flow changes and accurately adjust the throttle valve opening; simultaneously, it avoids the safety risks of manual operation near high-pressure pipelines.

[0069] In some embodiments, to ensure reliable connection between the servo motor 9 and the adjustment component 4, such as... Figure 6 As shown, the hydraulic oil pressure pulsation measuring device also includes a fixing and shaft connection device 10. One end of the fixing and shaft connection device 10 is fixedly connected to the adjusting component 4, and the other end of the fixing and shaft connection device 10 is fixedly connected to the servo motor 9. This device, through the cooperation of the servo motor 9 and the fixing and shaft connection device 10, can accurately convert the rotational motion of the servo motor 9 into the linear displacement of the adjusting component 4, ensuring the accuracy of the opening control of the throttle valve 3.

[0070] In some embodiments, in order to reduce hydraulic oil flow disturbances, such as Figure 6 As shown, the volumetric tank 2 is equipped with an oil drain port 21. The volumetric tank 2 serves to connect the oil inlet pipe 1 and the external oil outlet pipe, and to reduce interference in the hydraulic oil flow. The oil drain port 21 is directly integrated into the body of the volumetric tank 2, eliminating the need for an additional independent external pressure relief module and pressure stabilizing chamber structure. This allows for the timely discharge of impurities and air accumulated in the volumetric tank, and, combined with the tank's cavity structure, further reduces eddy current interference generated during hydraulic oil flow, stabilizing the oil pressure within the cavity and ensuring the accuracy of pressure pulsation measurement results. It also effectively simplifies the overall structure of the device, reduces its overall footprint, and allows for better adaptation to the limited installation space in hydraulic systems. This addresses the problem of traditional measuring devices being too large and difficult to arrange flexibly. Furthermore, this design facilitates the rapid emptying of residual hydraulic oil from the volumetric tank during maintenance, improving the convenience of device maintenance operations.

[0071] The following is based on Figure 6 Taking this as an example, the hydraulic oil pressure pulsation measuring device of this disclosure will be further described in detail. Figure 6The diagram illustrates the components of the hydraulic oil pressure pulsation measuring device, including an inlet pipe 1, a volumetric tank 2, a throttle valve 3, an adjusting assembly 4, a pulsation measurement sensor assembly 5, a front end plate 6, an oil passage plate 7, a rear end plate 8, a servo motor 9, and a fixing and shaft connection device 10. The inlet pipe 1 receives pulsating hydraulic oil. By controlling the rotation of the servo motor 9, the adjusting assembly 4 is pushed or pulled out, changing the opening of the throttle valve 3 to achieve a non-reflective function at the front end of the inlet pipe 1. The hydraulic oil flows through the throttle valve 3 and the oil passage plate 7 into the volumetric tank 2, and then through the drain port 21 on the upper side of the volumetric tank 2 into the hydraulic pipeline. Two pulsating pressure sensors and one conventional pressure sensor are located in the middle of the inlet pipe 1. The pulsating pressure sensors measure the pressure pulsation of the hydraulic oil; the conventional pressure sensor monitors pressure loss. The volumetric tank 2 primarily connects the inlet and outlet oil circuits and reduces hydraulic oil flow interference. By adjusting the distance between the end of the inlet pipe 1 and the beginning of the adjusting assembly 4, the throttling intensity can be changed to create a specific required pressure loss. The threaded tapered rod 41 in the adjusting assembly 4 has threads along its axis, and the center of the oil passage plate 7 also has threads. The two work together to push or pull the threaded tapered rod 41. The servo motor 9 is installed at the far right end of the entire device and is connected to the adjusting assembly 4. It controls the opening of the throttle valve 3 by rotating it.

[0072] Figure 7 A flowchart illustrating a control method for a hydraulic oil pressure pulsation measuring device, provided for at least one embodiment of this disclosure. This method is applicable to... Figures 1-6 A hydraulic oil pressure pulsation measuring device for any given scheme. For example... Figure 7 As shown, the method includes the following steps S10 and S20.

[0073] Step S10: During the hydraulic oil pressure pulsation measurement process, the action of the adjustment component 4 is dynamically adjusted so that the hydraulic oil pulsation in the oil inlet pipe 1 is reflected without change by changing the opening of the throttle valve 3.

[0074] Step S20: When there is no reflection of hydraulic oil pulsation in the oil inlet pipe 1, the pressure pulsation of the hydraulic oil is collected by the pulsation measurement sensor assembly 5.

[0075] This scheme, which uses dynamic adjustment of the throttle valve opening to acquire non-reflective hydraulic oil pulsations and then collects the data, combined with the hydraulic oil pressure pulsation measuring device in the above embodiment, solves the problem of excessive bulk in traditional measuring devices from a structural design perspective, allowing the hydraulic oil pressure pulsation measuring device to flexibly adapt to the limited installation space in the hydraulic system. It also avoids measurement interference caused by pulsation reflection from a measurement process perspective, effectively improving the accuracy of pressure pulsation measurement results. At the same time, it simplifies the operation process of venting and draining oil before and after measurement, taking into account both measurement efficiency and the convenience of subsequent device maintenance.

[0076] In the above-described scheme, this disclosure does not limit the control scheme of the adjustment component in step S10. In application scenarios, in addition to the schemes described in the later embodiments, a simple manual control push rod adjustment mode can also be used, which does not require the addition of an additional controller or control unit, further reducing the overall size of the device. Alternatively, an automatic closed-loop adjustment mode based on pressure feedback can be used to adapt to the needs of high-frequency and high-precision continuous measurement. Different adjustment modes do not require excessive additional installation space and still retain the advantages of eliminating pulsation reflection interference and improving measurement accuracy. When the system executes step S10, it can flexibly select the control scheme of the adjustment component according to the spatial conditions, measurement accuracy requirements, and operational needs of the actual measurement scenario to take into account the measurement needs under different application scenarios.

[0077] Figure 8 A flowchart illustrating a control scheme for an adjustment component provided in at least one embodiment of this disclosure. Figure 7 Based on the solution, in order to automatically adapt to different flow conditions, such as Figure 8 As shown, the control scheme for the adjustment component in step S10 may further include the following sub-steps S101-S105.

[0078] Sub-step S101: Obtain the actual flow rate of the hydraulic oil currently entering the inlet pipe 1, and the actual pressure difference between the inlet end and the outlet end of the throttle valve 3 (also known as the current actual pressure difference of the throttle valve).

[0079] Sub-step S102: Determine the expected pressure difference (also known as the expected pressure difference of the throttle valve at the no-reflection boundary) corresponding to the throttle valve 3 used to make the hydraulic oil pulsation in the inlet pipe 1 non-reflective, based on the actual flow rate of the hydraulic oil.

[0080] Sub-step S103: Based on the comparison between the actual pressure difference and the expected pressure difference, control the action of the regulating component 4 to change the opening degree of the throttle valve 3.

[0081] Sub-step S104: During the operation of the regulating component 4, monitor the deviation between the actual pressure difference and the expected pressure difference.

[0082] Sub-step S105: When the deviation between the actual pressure difference and the expected pressure difference is less than the preset tolerance, it is determined that the hydraulic oil pulsation in the oil inlet pipe 1 is not reflected, and the operation of the regulating component 4 is stopped.

[0083] Based on the fundamental principle of the formation of reflection-free conditions, the actual flow rate and sound velocity of the hydraulic oil are key factors affecting the formation of the reflection-free boundary. Therefore, step S101 first measures the flow rate of the hydraulic oil and reads it into the controller. The above scheme establishes a complete closed-loop control strategy: acquiring the flow rate, calculating the desired pressure difference, comparing the actual pressure difference, and adjusting the opening. By monitoring the deviation between the actual pressure difference and the desired pressure difference in real time, and using this to control the action of the regulating component, the reflection-free moment can be quickly and accurately locked.

[0084] In some embodiments, Figure 8 Based on the proposed solution, in order to accurately calculate the expected pressure difference, sub-step S102 can calculate the expected pressure difference using the following formula. :

[0085] In the formula, Indicates the actual flow rate of the hydraulic oil. This indicates the speed of sound of hydraulic oil. This represents the characteristic coefficient of the throttle valve.

[0086] This calculation method only requires collecting the actual flow rate of hydraulic oil to derive the expected pressure difference of the throttle valve, without the need for an additional large-volume dedicated pressure pulsation acquisition module. This effectively reduces the space occupied by the entire measuring device, solving the problem that traditional measuring devices are difficult to install and use in the limited space of a hydraulic system. At the same time, the derivation process of this calculation method relies on the inherent physical parameters of hydraulic oil, and the measurement accuracy will not be reduced due to the miniaturization of the device, making it suitable for the pulsation measurement needs of most small and medium-sized hydraulic systems.

[0087] In some embodiments, Figure 8 Based on the scheme, in order to adaptively control the opening of the throttle valve 3, sub-step S103 may further include the following sub-steps S103a-S103b.

[0088] Sub-step S103a: In response to the actual pressure difference being less than the expected pressure difference, control the regulating component 4 to reduce the opening of the throttle valve 3.

[0089] Sub-step S103b: In response to the actual pressure difference being greater than the expected pressure difference, control the regulating component 4 to increase the opening of the throttle valve 3.

[0090] Specifically, when the control and adjustment component 4 decreases the opening of the throttle valve 3, the flow area of ​​the throttle valve 3 decreases. Conversely, when the control and adjustment component 4 increases the opening of the throttle valve 3, the flow area of ​​the throttle valve 3 increases. This scheme clearly defines the control logic of decreasing the opening when the pressure difference is small and increasing the opening when the pressure difference is large, making the implementation of this non-reflective function simple, practical, and easy to program in the controller.

[0091] In some embodiments, Figure 8 Based on the proposed solution, to further optimize the control of the servo motor, in sub-step S105, the threaded tapered rod is continuously changed, and real-time calculations are performed. and The difference between the two, if the absolute value of the difference is less than the preset tolerance. ,Right now: , The servo motor will then immediately stop rotating. After the above operation, the pressure pulsation at the inlet is measured and recorded using a pulsating pressure sensor.

[0092] Figure 9 A flowchart illustrating another hydraulic oil pressure pulsation measuring device control method provided for at least one embodiment of this disclosure. Figure 7 or Figure 8 Based on the proposed solution, to further eliminate invalid data, the pulsation measurement sensor assembly 5 includes multiple pulsation pressure sensors 51, and, as... Figure 9 As shown, the method further includes the following steps S30-S50.

[0093] Step S30: Obtain the amplitude of multiple pulsating pressure sensors 51 in the pulsating measurement sensor assembly 5.

[0094] Step S40: Compare the amplitudes of multiple pulsating pressure sensors 51.

[0095] Step S50: In response to the consistent amplitude of multiple pulsating pressure sensors 51, it is determined that the hydraulic oil pulsation in the oil inlet pipe 1 is not reflected, and the hydraulic oil pressure pulsation collected by the pulsation measurement sensor assembly 5 is valid.

[0096] It should be noted that the pressure pulsation of the hydraulic oil collected by the final output pulsation measurement sensor assembly 5 is the amplitude of any pulsation pressure sensor 51.

[0097] Steps S30-S50 can be placed after step S20. Steps S30-S50 effectively verify whether pressure pulsation reflection interference has been effectively eliminated in the current measurement scenario, thus preventing measurement result distortion caused by pulsation reflection. Only when it is determined that there is no reflection of hydraulic oil pulsation in the inlet pipe 1 and the collected data is valid will the final measurement result be retained. This setting can effectively ensure the accuracy and reliability of pressure pulsation measurement while reducing the overall size of the device and adapting to the limited installation space of the hydraulic system, meeting the high-precision measurement requirements of miniaturized application scenarios.

[0098] Figure 10 A flowchart illustrating an example of a control method for a hydraulic oil pressure pulsation measuring device provided in at least one embodiment of this disclosure. Figure 10As shown, examples of this method include: 1) Obtain the actual flow rate of the hydraulic oil; 2) Calculate the desired pressure difference of the throttle valve to form a non-reflective boundary based on the actual flow rate of the hydraulic oil. ; 3) The controller reads the current actual pressure difference of the throttle valve. The pressure difference between the throttle valve and the desired pressure difference Make a comparison and judgment, if < This indicates that the current throttle valve opening is too large, and, if > This indicates that the current throttle valve opening is too small.

[0099] 4) Based on the pressure difference comparison results, start the servo motor to change the opening of the throttle valve. If the throttle valve opening is too large, start the servo motor to push the threaded conical rod and reduce the flow area of ​​the throttle valve. If the throttle valve opening is too small, start the servo motor in the opposite direction to pull out the threaded conical rod and increase the flow area of ​​the throttle valve.

[0100] 5) When the difference between the actual pressure difference and the expected pressure difference is less than the set tolerance, stop the rotation of the servo motor.

[0101] Figure 11 This is a schematic diagram of the composition of a hydraulic system provided for at least one embodiment of the present disclosure. Figure 11 As shown, the hydraulic system 100 integrates a hydraulic oil pressure pulsation measuring device 101. This hydraulic oil pressure pulsation measuring device 101 employs a compact integrated design, adaptable to the limited installation space within the hydraulic system.

[0102] Figure 12 A schematic diagram illustrating the composition of an example hydraulic system provided for at least one embodiment of this disclosure. (See attached diagram.) Figure 12 As shown, the hydraulic system 100 integrates a hydraulic oil pressure pulsation measuring device 101, a flow sensor 102, a load proportional valve 103, an oil tank 104, a motor 105, a hydraulic pump 106, and a safety valve 107. The motor 105 drives the hydraulic pump 106 to draw hydraulic oil from the oil tank 104. The pressure oil output from the hydraulic pump 106 undergoes initial pressure regulation and stabilization via the safety valve 107, then flows sequentially through the hydraulic oil pressure pulsation measuring device 101, the flow sensor 102, and the load proportional valve 103, finally returning to the oil tank 104. The flow sensor 102 is used to collect the actual flow parameters of the hydraulic oil in the pipeline in real time, providing accurate raw data for subsequent throttle valve opening adjustment and pressure pulsation calculation. The entire integrated structure is compact, does not occupy excessive internal space of the hydraulic system, and can meet the installation and adaptation requirements of small hydraulic systems of different specifications.

[0103] Figure 13 for Figure 12 The example of a hydraulic system provides a comparison of pressure pulsations obtained from two pulsating pressure sensors. (See attached image.) Figure 13 As shown, the pressure pulsation curve A obtained by one pulsating pressure sensor and the pressure pulsation curve B obtained by another pulsating pressure sensor have the same trend of evolution over time, with only a phase shift. Moreover, their amplitude distribution characteristics are basically the same. It can be inferred that the transmission inside the oil inlet pipe is a traveling wave, which has formed a non-reflective boundary condition. This indicates that the hydraulic oil pressure pulsation measuring device has successfully achieved the non-reflective function.

[0104] Although embodiments of the present disclosure have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present disclosure, and all such modifications and variations fall within the scope defined by the appended claims.

[0105] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A hydraulic oil pressure pulsation measuring device, characterized in that, include: Oil inlet pipe (1), the inlet of which is used to introduce the hydraulic oil to be measured; The volumetric tank (2) has an oil inlet connected to the outlet of the oil inlet pipe (1); Throttling valve (3), the throttle valve (3) is disposed between the oil inlet pipe (1) and the volume box (2); An adjusting component (4) is configured to cooperate with the throttle valve (3), and the action of the adjusting component (4) changes the opening degree of the throttle valve (3); and, Pulse measurement sensor assembly (5), wherein the pulse measurement sensor assembly (5) is disposed in the oil inlet pipe (1); The adjustment component (4) is configured as follows: During the hydraulic oil pressure pulsation measurement process, the action of the adjustment component (4) is dynamically adjusted so that the hydraulic oil pulsation in the oil inlet pipe (1) is not reflected by changing the opening of the throttle valve (3).

2. The hydraulic oil pressure pulsation measuring device according to claim 1, characterized in that, Also includes: Front end plate (6), the front end plate (6) is fixedly connected to the oil inlet pipe (1), and the front end plate (6) is used to fix and support the oil inlet pipe (1) and to seal the oil inlet of the volume box (2); An oil passage plate (7) is disposed inside the volumetric tank (2), and the oil passage plate (7) is provided with an oil passage hole (71) for the hydraulic oil to pass through and a mating hole (72) for the adjusting assembly (4) to pass through and move; and, The rear end plate (8) is disposed at the oil outlet of the volume box (2) and is used to seal the oil outlet of the volume box (2).

3. The hydraulic oil pressure pulsation measuring device according to claim 1 or 2, characterized in that, Also includes: A servo motor (9) is connected to the adjustment component (4), and the servo motor (9) is used to drive the operation of the adjustment component (4).

4. The hydraulic oil pressure pulsation measuring device according to claim 1 or 2, characterized in that, The adjustment component (4) includes: A threaded tapered rod (41) moves axially along the oil inlet pipe (1), and one end of the threaded tapered rod (41) is provided with a conical valve core (41a). The conical valve core (41a) and the outlet of the oil inlet pipe (1) form the throttle valve (3). The threaded tapered rod (41) has a thread in the axial direction for helical transmission to achieve movement.

5. The hydraulic oil pressure pulsation measuring device according to claim 1 or 2, characterized in that, The pulsation measurement sensor assembly (5) includes: Multiple pulsating pressure sensors (51) are sequentially arranged along the axis of the oil inlet pipe (1) to detect hydraulic oil pulsation in the oil inlet pipe (1). By comparing the amplitudes of the multiple pulsating pressure sensors (51), it is verified that the hydraulic oil pulsation in the oil inlet pipe (1) is unreflected when the amplitudes of the multiple pulsating pressure sensors (51) are consistent.

6. The hydraulic oil pressure pulsation measuring device according to claim 5, characterized in that, The pulsation measurement sensor assembly (5) also includes: At least one conventional pressure sensor (52) is provided in the oil inlet pipe (1) for monitoring the pressure loss of the hydraulic oil during the process of the regulating assembly (4) adjusting the opening of the throttle valve (3).

7. A control method for a hydraulic oil pressure pulsation measuring device, applied to a hydraulic oil pressure pulsation measuring device having an inlet pipe (1), a volumetric tank (2), a throttle valve (3), an adjustment assembly (4), and a pulsation measuring sensor assembly (5), characterized in that, include: During the measurement of hydraulic oil pressure pulsation, the action of the regulating component (4) is dynamically adjusted so that the hydraulic oil pulsation in the inlet pipe (1) is reflected without reflection by changing the opening of the throttle valve (3); and, When the hydraulic oil pulsates without reflection in the oil inlet pipe (1), the pressure pulsation of the hydraulic oil is collected by the pulsation measurement sensor assembly (5).

8. The method according to claim 7, characterized in that, The dynamic adjustment of the adjustment component (4) includes: Obtain the actual flow rate of the hydraulic oil currently entering the inlet pipe (1), and the actual pressure difference between the inlet end and the outlet end of the throttle valve (3); The desired pressure difference corresponding to the throttle valve used to ensure that the hydraulic oil pulsation in the inlet pipe (1) is unreflected is determined based on the actual flow rate of the hydraulic oil. Based on the comparison between the actual pressure difference and the expected pressure difference, the regulating component (4) is controlled to change the opening of the throttle valve (3); During the operation of the regulating component (4), the deviation between the actual pressure difference and the desired pressure difference is monitored; and, When the deviation between the actual pressure difference and the expected pressure difference is less than the preset tolerance, it is determined that the hydraulic oil pulsation in the oil inlet pipe (1) is not reflected, and the operation of the regulating component (4) is stopped.

9. The method according to claim 8, characterized in that, The control of the regulating component (4) based on the comparison between the actual pressure difference and the expected pressure difference includes: In response to the actual pressure difference being less than the desired pressure difference, the regulating component (4) is controlled to reduce the opening of the throttle valve (3); and, In response to the actual pressure difference being greater than the expected pressure difference, the regulating component (4) is controlled to increase the opening of the throttle valve (3); Furthermore, the pulsation measurement sensor assembly (5) includes a plurality of pulsation pressure sensors (51), and the method further includes: Acquire the amplitude values ​​of multiple pulsating pressure sensors (51); The amplitudes of the plurality of pulsating pressure sensors (51) are compared; and, In response to the consistent amplitude of the plurality of pulsating pressure sensors (51), it is determined that the hydraulic oil pulsation in the oil inlet pipe (1) is not reflected, and the hydraulic oil pressure pulsation collected by the pulsation measurement sensor assembly (5) is valid.

10. A hydraulic system, characterized in that, Includes the hydraulic oil pressure pulsation measuring device as described in any one of claims 1-6.

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