CN213114786U - Intelligent control hydraulic system - Google Patents

Abstract

The utility model discloses a hydraulic system is controlled to intelligence, hydraulic system is controlled to intelligence includes: the system mainly converts detection signals of input and output power of the hydraulic execution unit into regulation and control signals of the high-speed switch valve bank, the variable pump or the power source through the control unit, accurately pumps the flow or pressure of oil, and eliminates the problems of pressure regulation energy loss and temperature rise of an overflow valve in a conventional hydraulic system.

Description

Intelligent control hydraulic system

Technical Field

The utility model relates to a hydraulic pressure technical field, concretely relates to hydraulic system is controlled to intelligence.

Background

With the development of AI technology, mankind needs powerful construction equipment, such as hydraulic excavators, etc., to cope with increasingly complex and variable natural environments or disasters. However, the disaster area is often accompanied by many dangerous situations, and the development of a remote control excavator or an automatic driving excavator becomes a trend in consideration of personnel safety.

Generally, a remote control or automatic driving technology generally adopts electrical elements such as a stepping motor and the like which are easy to control digitally, but the power density of the electrical elements such as the stepping motor and the like is smaller than that of a hydraulic technology, so that the construction rescue with high power density in a narrow space is difficult to meet, and the hydraulic pressure has a power density of 'small strength and large strength', so that the development of a digital hydraulic pressure or a hydraulic digital twinning technology is inevitably a trend in order to be connected with an AI technology.

At present, two aspects exist in the digital hydraulic industry, one is to disperse the flow in a hydraulic system into controllable digital quantity through a high-speed switch valve so as to facilitate digital control; the other is that the main parameters of the hydraulic elements (such as the displacement of a pump, the displacement of a motor, the opening degree of a valve, the displacement and the speed of a hydraulic cylinder) are controlled by digital electricity, and the digital electricity is called digital hydraulic pressure.

One of the two hydraulic digital technologies is limited by a high-speed switch valve technology, so that the requirement of a large-flow engineering hydraulic technology is difficult to realize; and another method is that due to the change of the temperature or density of the working medium, the accuracy of the control of the overall target requirement (such as the hydraulic oil cylinder not only needs to be accurate in displacement, but also needs to be adjustable and output power is adaptive to load) is difficult to adjust in real time.

The hydraulic digital twin technology mainly comprises the steps of mirroring or reflecting the current situation of a hydraulic element or a hydraulic system through simulation calculation of the hydraulic element or the hydraulic system, or predicting and evaluating the potential of the permanent work of the future hydraulic element or the hydraulic system.

Generally, the hydraulic digital twin simulation technology is not as accurate as the data detected by the sensing technology in terms of large simulation difficulty and large deviation of a hydraulic system running in a complex disaster site, and can realize correct or accurate regulation and control of a remote hydraulic system. Therefore, the Weifang Jiateng hydraulic technology Limited company invents sensors such as a pipe joint for hydraulic multi-parameter (hydraulic pressure, temperature, pressure pulsation and flowmeter flow pulsation) composite detection, and can carry out data acquisition on oil liquid p, flow q and the like of an oil inlet and an oil outlet of a hydraulic functional element (a hydraulic pump, a hydraulic cylinder and a hydraulic motor), so that the power density pq of the inlet and the outlet of the hydraulic element can be timely mastered, eyes are provided for a hydraulic system for AI intelligent control, and powerful support is provided for effectively correcting the service life prediction or operation and maintenance of a digital twin hydraulic excavator in real time.

However, an intelligently controlled hydraulic system is only eye-neutral, and it is essential that the main actuating unit also needs to be precisely controllable. The main execution units of the hydraulic excavator mainly include two types: the hydraulic control system comprises a hydraulic oil cylinder and a hydraulic motor, an intelligent control system of the hydraulic oil cylinder is inevitably divided into a hydraulic control loop which mainly comprises execution units, but load changes connected with the execution units are difficult to quantify (have a regular power spectrum), the changes of actual loads are irregular, and impact loads are often accompanied, the impact loads cause impact on the system through an oil circuit of the hydraulic motor, and the impact is difficult to simulate and control, so that the hydraulic work is not stable.

At present, a conventional hydraulic system is usually a static pressure transmission consisting of a pump, a control valve and a hydraulic actuator (a hydraulic cylinder and a hydraulic motor), and generally comprises an overflow valve for controlling the pressure of the system, a throttle hole (or a valve) for controlling the speed and the like, and the working principle of the overflow valve is also controlled by the size of a throttle orifice which flows back to an oil tank, so that the throttling loss of the hydraulic system is large, and the temperature rise of oil liquid is large; further, since the number of hydraulic control valves used is large, the opening degree of the control valve position is generally in a wireless relationship with the actual flow rate or pressure, and therefore, it is difficult to actually perform accurate control operation of the actuator unit (hydraulic cylinder or hydraulic motor).

Therefore, a novel hydraulic system is urgently needed, and accurate regulation and control of execution units (a hydraulic oil cylinder and a hydraulic motor) can be realized. Meanwhile, a novel intelligent control hydraulic system needs to be developed by combining the development of digital variable pump and flow high-speed switch valve technologies and by means of development of software development, digital simulation, cloud computing and the like, and is used for engineering machinery such as a command control hydraulic excavator for remote disaster rescue.

Therefore, it is imperative to develop a digital intelligent control hydraulic system for disaster site rescue.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hydraulic system is controlled to intelligence to solve at least one technical problem among the above-mentioned technical problem.

The utility model provides a hydraulic system is controlled to intelligence is realized through following technical scheme:

an intelligent control hydraulic system, comprising: the variable pump has the advantages that the displacement of the variable pump can be regulated and controlled; a power source that powers the variable displacement pump; the hydraulic actuating unit comprises a hydraulic actuating element and a high-speed switch valve group arranged at an oil inlet and/or an oil outlet of the hydraulic actuating element, the high-speed switch valve group comprises a plurality of switch valves capable of being opened and closed independently, and the flow of hydraulic oil or the height of the oil pressure at the oil inlet and/or the oil outlet of the hydraulic actuating element can be adjusted by adjusting the opening number of the switch valves; the multi-parameter detection integrated composite sensor is arranged at a pump inlet and a pump outlet of the variable pump and at an oil inlet and an oil outlet of the hydraulic actuating element, and at least can detect flow and pressure signals; and the control unit can receive the signals detected by the multi-parameter detection integrated composite sensor and sequentially adjust at least one of the opening number of the switch valves of the high-speed switch valve group at the oil inlet or the oil outlet of the hydraulic execution element, the displacement of the variable pump and the output power of the power source according to an internal program or manual operation so as to adapt to the load change of the load end of the hydraulic execution element.

The utility model provides an intelligence accuse hydraulic system still has following additional technical characterstic:

the power source is a diesel engine, a gasoline engine, a gas engine or an electric motor, and the output power of the power source is regulated and controlled by regulating and controlling the diesel engine or the gasoline engine to supply oil, the gas engine to supply gas or regulating and controlling the electric motor to increase current or voltage through electrification or digitization.

The variable pump is a radial plunger pump or an axial plunger pump, and the control of the displacement of the variable pump can be electrified or digitally controlled.

The multi-parameter detection integrated composite sensor also comprises a detector which can convert the detection signal of the multi-parameter detection integrated composite sensor into a digital signal and transmit the digital signal to the control unit.

The high-speed switch valve group is controlled by a digital signal.

The hydraulic actuating element is a hydraulic oil cylinder.

The hydraulic actuating element is a hydraulic motor, a first spiral pipe is arranged between an oil inlet of the hydraulic motor and the high-speed switch valve bank, and/or a second spiral pipe is arranged between an oil outlet of the hydraulic motor and the high-speed switch valve bank.

Since the technical scheme is used, the utility model discloses the beneficial effect who gains does:

1. the utility model provides a hydraulic system is controlled to intelligence adopts the variable displacement pump can in time regulate and control the discharge capacity to and the setting of high-speed ooff valve group can effectively adjust the size of the flow of business turn over hydraulic actuator's hydraulic oil and the height of oil pressure with the load requirement of reply difference.

The multi-parameter detection integrated composite sensor can monitor oil p, flow q and the like of an oil inlet and an oil outlet of an execution unit in real time and can carry out data acquisition, so that the power pq of the inlet and the outlet of a hydraulic element can be grasped in time and fed back in time to eliminate simulation or calculation errors, and powerful support is provided for effectively correcting the service life prediction or operation and maintenance of the digital twin hydraulic excavator in real time.

Furthermore, the utility model discloses can also reduce the valve core to valve variety quantity, normal switching-over valve meso position function and cover the requirement of volume, reduce hydraulic system's overall cost, and concentrate on the holistic target demand of hydraulic system with the focus, make hydraulic transmission control greatly simplify, let the user needn't care what is PID, what is the frequency response, what is complicated device characteristics such as valve port gain, reduce and rely on hydraulic component emulation, easily engineering technical staff masters, and digital flow distribution, realize AI power unit control.

2. As a preferred embodiment of the present invention, the variable displacement pump is a radial plunger pump or an axial plunger pump, and the regulation and control of the displacement of the variable displacement pump can be controlled electrically or digitally. The plunger pump has higher cooperation precision, and sealing performance is good, still has higher volumetric efficiency at high-pressure work, only needs to change the working stroke of plunger just can change the flow, easily realizes the variable, through consequently can be better provide high power density, control through electric or digitization moreover and can effectively improve work efficiency.

3. As a preferred embodiment of the utility model, the integrated compound sensor of multi-parameter detection still includes the detector, the detector can with the integrated compound sensor detection signal conversion of multi-parameter detection becomes digital signal and transmits extremely the control unit. The detector can convert signals such as flow and pressure detected by the sensor into digital signals to be transmitted to the control unit, so that a user and the control unit can read and collect data in time and perform related corresponding operations conveniently.

4. As a preferred embodiment of the present invention, the hydraulic actuator is a hydraulic cylinder or the hydraulic actuator is a hydraulic motor, and the oil inlet of the hydraulic motor and the high-speed switch valve set are provided with a first spiral pipe therebetween, and/or the oil outlet of the hydraulic motor and the high-speed switch valve set are provided with a second spiral pipe therebetween. The application of the spiral pipe enables a hydraulic system simulated by circuit fitting to have a hydraulic element with obvious inductive liquid resistance, can be effectively used for inhibiting the influence of pressure or flow pulsation of an actuating element in the hydraulic system on the dynamic characteristics of the system, and provides element support for modeling of the hydraulic system, so that the hydraulic system can be controlled.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the present drawings:

fig. 1 is a hydraulic schematic diagram of an intelligent hydraulic system according to an embodiment of the present invention;

fig. 2 is a partial schematic diagram of a hydraulic motor according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a portion of a hydraulic cylinder according to an embodiment of the present invention;

reference numerals:

10-a control unit; 20-a power source; 30-variable pump; 40-a hydraulic oil cylinder; 50-a hydraulic motor; 60-high speed switch valve group; 61-on-off valve; 70-multi-parameter detection integrated composite sensor; 71-a detector; 80-a two-position two-way electromagnetic directional valve; 90-high speed switching valve group bus; 100-control input power bus; 110-a digital bus; 120-control pump displacement digital bus; 130-an optical cable; 140-an electrically controlled safety valve; 150-a filter; 160-a heat sink; 170-a first spiral pipe; 180-second spiral tube.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

As shown in fig. 1-3, the utility model provides a hydraulic system is controlled to intelligence, include:

the variable displacement pump 30 has a controllable displacement, the controllable displacement of the variable displacement pump 30 is digital signals or analog signals sent by the control unit 10, and the controllable displacement can be controlled by adjusting the opening of an internal valve or adjusting the diameter of an internal impeller after the variable displacement pump 30 receives the signals sent by the control unit 10.

And the power source 20 is combined with the variable pump 30 to provide power for the variable pump 30, and the power source 20 is used for pressurizing hydraulic oil in an oil tank so as to enable the hydraulic oil to enter the hydraulic actuator.

The hydraulic actuator unit comprises a hydraulic actuator and a high-speed switch valve group 60 arranged at an oil inlet and/or an oil outlet of the hydraulic actuator, the high-speed switch valve group 60 comprises a plurality of switch valves 61 capable of being opened and closed independently, the flow of hydraulic oil at the oil inlet and/or the oil outlet of the hydraulic actuator or the oil pressure can be adjusted by adjusting the opening number of the switch valves 61, for example, when a system cannot meet a load requirement, the opening number of the switch valves 61 arranged at the oil inlet of the hydraulic actuator is increased, so that the flow of the hydraulic oil flowing into the oil inlet is increased, the oil pressure of an oil inlet cavity in the hydraulic actuator is increased, and the power density pq is increased; or the opening number of the switch valves 61 arranged at the oil outlet of the hydraulic execution element is increased, so that the flow of the hydraulic oil flowing out of the oil outlet is increased, the oil pressure of the oil outlet cavity of the hydraulic execution element is increased, and the power density pq is increased; or the opening number of the switch valves 61 at the oil inlet and the oil outlet is increased at the same time to enhance the power density increasing effect. Preferably, the driving of the high-speed switch valve group 60 is controlled by a voice coil motor, and has the effects of high speed and high power. The valve core of the switch valve 61 should be constructed to ensure the balance of pressure oil, thereby facilitating quick opening.

The integrated composite sensor 70 of multi-parameter detection, the pump entry and the pump export of variable pump 30 the oil inlet and the delivery port department of hydraulic actuator all are provided with the integrated composite sensor 70 of multi-parameter detection, the integrated composite sensor 70 of multi-parameter detection can detect flow and pressure signal at least, can also add temperature signal detection etc. certainly, the integrated composite sensor 70 of multi-parameter detection can implement data acquisition to fluid p and flow q etc. of hydraulic function component (hydraulic pump, pneumatic cylinder, hydraulic motor) business turn over hydraulic fluid mouth, and the power pq of hydraulic component's import and export just can in time be mastered like this, provides eyes for the hydraulic system of AI intelligence accuse, also provides strong support for the life-span prediction or the fortune dimension of the hydraulic shovel of effective real-time correction digit twinborn. Compared with a flow sensor or a pressure sensor with only a single detection function, the multi-parameter detection integrated composite sensor 70 integrates two or more sensor 70 units for detecting different physical quantities, the unit signals of the sensors can respectively output signals independently, and the high-level signals are measured by a processor embedded in the assembly and then output in a specified format in a centralized mode.

A control unit 10, said control unit 10 being capable of receiving the signal detected by said multi-parameter detection integrated composite sensor 70, and adjusting at least one of the opening number of the switch valves 61 of the high-speed switch valve group at the oil inlet or the oil outlet of said hydraulic actuator, the displacement of said variable pump 30, and the output power of said power source 20 according to an internal program or by manual operation, so as to adapt to the load change at the load end of said hydraulic actuator. The control unit 10 may be a PLC or a computer acquisition and control system.

As a preferred embodiment of the present invention, the control unit 10 receives the signal detected by the multi-parameter detection integrated composite sensor, and sequentially adjusts at least one of the opening number of the switch valves 61 of the high-speed switch valve group at the oil inlet or the oil outlet of the hydraulic actuator, the displacement of the variable displacement pump 30, and the output power of the power source 20 according to an internal program to adapt to the load change at the load end of the hydraulic actuator. That is, the adjustment is performed in the simulation order, the number of open switching valves 61 of the high-speed switching valve group is first adjusted, and if the adjustment can accommodate a load change, no other operation is necessary, and if the adjustment still cannot accommodate a load change, the displacement of the variable displacement pump is adjusted. Similarly, if the variable displacement pump is adjusted to accommodate a load change, no other operation is required, and if the variable displacement pump is adjusted and the load change cannot be accommodated, the output power of the power source is adjusted.

The intelligent control hydraulic system provided by the utility model also comprises a filter 150 arranged between the pump inlet of the variable pump 30 and the oil tank, which can filter the impurities in the oil tank; an electrically controlled safety valve 140 disposed in the oil inlet path to meet extreme environmental and load requirements; and a radiator 160 disposed in the oil return path to dissipate heat of the hydraulic oil in the oil return path and then discharge the hydraulic oil into the oil tank.

The utility model provides a hydraulic system is controlled to intelligence, can also reduce valve variety quantity, the case of normal switching-over valve mesofunction covers the requirement of volume, reduce hydraulic system's overall cost, and concentrate on the holistic target demand of hydraulic system with the focus, make hydraulic transmission control greatly simplify, let the user needn't care what be PID again, what be the frequency response, what be complicated device characteristics such as valve port gain, the reduction relies on hydraulic component emulation, easily engineering technical staff masters, and digital flow distribution, realize AI power unit control.

As shown in fig. 1, the intelligent hydraulic control system provided by the present invention is provided with a two-position two-way electromagnetic directional valve 80 for exchanging the flow direction of the hydraulic oil to perfect the function of the system for reciprocating, when the two-position two-way electromagnetic directional valve 80 is powered on, the main valve thereof is opened, the outlet of the pump is communicated with the oil inlet pipeline, and the oil return pipeline is communicated with the oil tank; when the two-position two-way electromagnetic directional valve 80 is powered off, the main valve is closed, the outlet of the pump is communicated with an oil return pipeline, and the oil inlet pipeline is communicated with an oil tank; or when the two-position two-way electromagnetic directional valve 80 is electrified, the main valve is opened, the outlet of the pump is communicated with an oil return pipeline, and the oil inlet pipeline is communicated with an oil tank; when the two-position two-way electromagnetic directional valve 80 is powered off, the main valve is closed, the pump outlet is communicated with the oil inlet pipeline, and the oil return pipeline is communicated with the oil tank.

As a preferred embodiment of the present invention, the power source 20 is a diesel engine, a gasoline engine, a gas engine or an electric motor, and is controlled by electrification or digitization, the diesel engine or the gasoline engine supplies oil, the gas engine supplies gas or is controlled by the electric motor to increase current or voltage, so as to control the output power of the power source 20. Different power output machines have advantages and disadvantages, and can select proper machines as power sources according to actual working conditions. The electrification control practicability is strong, the electrification control method has manual and electric control methods, corresponding methods and strategies can be adopted for processing aiming at different conditions in the operation process of the system, and the electrification control method has the characteristics of accuracy, high efficiency, real-time monitoring, high safety performance and the like. The digital control technology has the advantages of faster control performance, higher flexibility and higher programmability.

As a preferred embodiment of the present invention, the variable displacement pump 30 is a radial plunger pump or an axial plunger pump, and the control of the displacement of the variable displacement pump 30 can be controlled electrically or digitally. The plunger pump is a hydraulic pump which absorbs and presses oil by changing the sealed volume caused by the reciprocating motion of a plunger in a cylinder body, and compared with a gear pump and a vane pump, the pump has the advantages that: firstly, the parts forming the sealed volume are cylindrical plunger and cylinder holes, so that the processing is convenient, higher matching precision can be obtained, the sealing performance is good, and higher volume efficiency is still achieved in high-pressure work; secondly, the flow can be changed only by changing the working stroke of the plunger, and the variable is easy to realize; thirdly, the main parts in the plunger pump are all under the action of compressive stress, and the strength performance of the material can be fully utilized. Because the plunger pump has high pressure, compact structure, high efficiency and convenient flow regulation, the plunger pump can be divided into two categories of radial plunger pump and axial plunger pump according to different arrangement and movement directions of the plungers in the occasions where the high pressure, large flow and high power systems are needed and the flow needs to be regulated, and the eccentric quantity or the angle of the swash plate for regulating the flow can be controlled by digital through electric signal conversion.

As a preferred embodiment of the present invention, the multi-parameter detection integrated composite sensor 70 further includes a detector 71, the detector 71 can convert the detection signal of the multi-parameter detection integrated composite sensor 70 into a digital signal and transmit the digital signal to the control unit 10. The detector 71 is a multi-parameter detector 71, is arranged between the multi-parameter detection integrated composite sensor 70 and the control unit 10, is connected with the multi-parameter detection integrated composite sensor 70 through an optical cable 130, and is connected with the detector 71 and the control unit 10 through a digital bus, so that signals which are detected by the multi-parameter detection integrated composite sensor 70 and are difficult to read directly are converted into digital signals and transmitted to the control unit 10, and a user can read and acquire the digital signals directly.

As a preferred embodiment of the present invention, the high-speed switch valve set 60 is a high-speed switch valve set controlled by a digital signal. The digitization of the high-speed switch valve group has many advantages, can be directly interfaced with a control unit, does not need an A/D converter, and has the advantages of simple structure, good manufacturability, strong anti-pollution capability, good repeatability, stable and reliable work and high cost performance.

Further, according to actual requirements, the hydraulic actuator can be selected to be a hydraulic oil cylinder 40 or a hydraulic motor 50, and a first spiral pipe 170 is arranged between an oil inlet of the hydraulic motor 50 and the high-speed switch valve group 60, and/or a second spiral pipe 180 is arranged between an oil outlet of the hydraulic motor 50 and the high-speed switch valve group 60. The spiral pipe structure can convert the impact kinetic energy of the pressure pulsation generated in the hydraulic pipeline into the potential energy of the spiral pipe, and the redundant energy in the pressure pulsation is stored in the elastic deformation of the spiral pipe, the spiral pipe can stretch out and draw back along with the pressure pulsation to balance the pressure pulsation, the pulsation propagation along the pipeline is reduced, meanwhile, the spiral pipe is used for enabling the spiral pipe to have a hydraulic element with obvious inductive and resistive liquid resistance in an intelligent control hydraulic system, the influence of the pressure or flow pulsation of an executing element in the hydraulic system on the dynamic characteristic of the system can be effectively inhibited, and element support is provided for modeling of the hydraulic system.

The utility model can be realized by adopting or using the prior art for reference in places which are not mentioned in the utility model.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (7)

1. An intelligent control hydraulic system is characterized by comprising:

the variable pump has the advantages that the displacement of the variable pump can be regulated and controlled;

a power source that powers the variable displacement pump;

the hydraulic actuating unit comprises a hydraulic actuating element and a high-speed switch valve group arranged at an oil inlet and/or an oil outlet of the hydraulic actuating element, the high-speed switch valve group comprises a plurality of switch valves capable of being opened and closed independently, and the flow of hydraulic oil or the height of the oil pressure at the oil inlet and/or the oil outlet of the hydraulic actuating element can be adjusted by adjusting the opening number of the switch valves;

the multi-parameter detection integrated composite sensor is arranged at a pump inlet and a pump outlet of the variable pump and at an oil inlet and an oil outlet of the hydraulic actuating element, and at least can detect flow and pressure signals; and

the control unit can receive the signals detected by the multi-parameter detection integrated composite sensor and sequentially adjust at least one of the opening number of the switch valves of the high-speed switch valve group at the oil inlet or the oil outlet of the hydraulic execution element, the displacement of the variable pump and the output power of the power source according to an internal program or manual operation so as to adapt to the load change of the load end of the hydraulic execution element.

2. The intelligent-control hydraulic system as claimed in claim 1,

the power source is a diesel engine, a gasoline engine, a gas engine or an electric motor, and the output power of the power source is regulated and controlled by regulating and controlling the diesel engine or the gasoline engine to supply oil, the gas engine to supply gas or regulating and controlling the electric motor to increase current or voltage through electrification or digitization.

3. The intelligent-control hydraulic system as claimed in claim 1,

the variable pump is a radial plunger pump or an axial plunger pump, and the control of the displacement of the variable pump can be electrified or digitally controlled.

4. The intelligent-control hydraulic system as claimed in claim 1,

the multi-parameter detection integrated composite sensor also comprises a detector which can convert the detection signal of the multi-parameter detection integrated composite sensor into a digital signal and transmit the digital signal to the control unit.

5. The intelligent-control hydraulic system as claimed in claim 1,

the high-speed switch valve group is controlled by a digital signal.

6. The intelligent control hydraulic system according to claim 5,

the hydraulic actuating element is a hydraulic oil cylinder.

7. The intelligent control hydraulic system according to claim 5,

the hydraulic actuating element is a hydraulic motor, a first spiral pipe is arranged between an oil inlet of the hydraulic motor and the high-speed switch valve bank, and/or a second spiral pipe is arranged between an oil outlet of the hydraulic motor and the high-speed switch valve bank.

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