CN110749350A - General tool for testing performance of electromagnetic valve - Google Patents
General tool for testing performance of electromagnetic valve Download PDFInfo
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- CN110749350A CN110749350A CN201911036301.9A CN201911036301A CN110749350A CN 110749350 A CN110749350 A CN 110749350A CN 201911036301 A CN201911036301 A CN 201911036301A CN 110749350 A CN110749350 A CN 110749350A
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Abstract
The invention discloses a general tool for testing the performance of an electromagnetic valve, which comprises a power source module, a hydraulic pipeline module, a test object module and a data acquisition and processing module, wherein the power source module is connected with the hydraulic pipeline module; the data acquisition processing module is respectively and electrically connected with the power source module, the hydraulic pipeline module and the test object module; the power source module comprises an electro-hydraulic servo cylinder, a motor module and a liquid storage bottle; the hydraulic pipeline module comprises a hydraulic pipeline, a booster valve, a pressure relief valve, a steel cylinder and a liquid recycling barrel; the data acquisition processing module comprises a control chip circuit module, a data acquisition display unit, a control command sending unit and a power supply module. The universal tool can generate stable and reliable hydraulic source output, and has the advantages of quick pressure response and high control precision; the consistency measurement of the performance of the same type of electromagnetic valve can be realized, the test efficiency is high, and the operation is convenient. The universal tool is small in size, all brake fluids such as pipelines and liquid storage tanks can be guaranteed to be in the same temperature state during performance testing of the high-low temperature electromagnetic valves, and testing accuracy is guaranteed.
Description
Technical Field
The invention relates to the technical field of electromagnetic valve testing, in particular to a general tool for testing the performance of an electromagnetic valve.
Background
With the rapid development of automobile electrification, the integrated electro-hydraulic braking system has very important influence on the braking safety performance of the automobile. The electromagnetic valve is an important part of the integrated electro-hydraulic brake system, and the performance of the electromagnetic valve has great influence on the pressure control effect of the integrated electro-hydraulic brake system and the automobile brake safety. Therefore, it is important to study the performance of the solenoid valve. The factor indexes influencing the performance of the electromagnetic valve product mainly comprise response time when the electromagnetic valve is powered on and powered off, electromagnetic valve pressure regulating characteristics, high-pressure sealing performance, performance consistency, opening current, power-off current and the like. The performance indexes of the electromagnetic valve can be obtained through an electromagnetic valve performance test bench.
The existing electromagnetic valve performance test experiment table generally has the following defects: firstly, a power source adopts a gas-liquid booster pump, air is pumped from an air source through the booster pump, and then the movement of a piston of a hydraulic cylinder is pushed, the air source is unstable on the one hand, and the air needs to be compressed to further generate thrust, so that the response is slow, and the precision is low; the boosting precision of the booster pump is not high, and the boosting is easy to be excessive or insufficient. Secondly, due to the fact that hydraulic pipelines are irregular, the rigidity characteristics of brake wheel cylinders of the same product are different, the testing pipelines are single, the performance consistency test of the electromagnetic valve cannot be completed, and the testing efficiency is low. The consistency of the performance of the same type of electromagnetic valve has great influence on the pressure control of integrated electro-hydraulic brake system products, and the consistency of the electromagnetic valve is extremely important. Thirdly, the test bed has large volume, needs an external gas source, and cannot ensure that all brake fluid in a brake pipeline and a liquid storage tank are at the same temperature when high and low temperature tests are carried out, so that the viscosity of the brake fluid is changed due to the mixing of cold and hot brake fluid during the performance test of the electromagnetic valve, and the performance test result of the electromagnetic valve is seriously influenced.
Therefore, the improvement and development of the electromagnetic valve performance test bench are very important for the verification and optimization of the electromagnetic valve performance.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a general tool for testing the performance of an electromagnetic valve, which can generate stable and reliable hydraulic source output and is small in size.
The purpose of the invention can be realized by the following technical scheme: a general tool for testing the performance of an electromagnetic valve comprises a power source module, a hydraulic pipeline module, a test object module and a data acquisition and processing module; the data acquisition processing module is respectively and electrically connected with the power source module, the hydraulic pipeline module and the test object module; the power source module comprises an electro-hydraulic servo cylinder, a motor module and a liquid storage bottle; the motor module is connected with the electro-hydraulic servo cylinder, and the liquid storage bottle is connected with the electro-hydraulic servo cylinder; the hydraulic pipeline module comprises a hydraulic pipeline, a pressure increasing valve, a pressure reducing valve, a steel cylinder and a liquid recycling barrel, the hydraulic pipeline is divided into the pressure increasing pipeline and the pressure reducing pipeline, the pressure increasing pipeline is sequentially connected with the pressure increasing valve, the test object module and the steel cylinder, and the pressure reducing pipeline is sequentially connected with the test object module, the pressure reducing valve and the liquid recycling barrel; the pressure increasing pipeline is connected with the pressure releasing pipeline; the pressure increasing valve is connected with the electro-hydraulic servo cylinder; the data acquisition processing module comprises a control chip circuit module, a data acquisition display unit, a control command sending unit and a power supply module; the power supply module is respectively and electrically connected with the control chip circuit module, the data acquisition and display unit and the control command sending unit; the control chip circuit module is in bidirectional electric connection with the control command sending unit; and the output end of the control command sending unit is connected with the input end of the data acquisition and display unit.
According to the preferable technical scheme, the pressurizing pipeline is divided into a main pressurizing pipeline and a secondary pressurizing pipeline, the main pressurizing pipeline is divided into two secondary pressurizing pipelines through a tee joint, and each secondary pressurizing pipeline is sequentially connected with a test object module and a steel cylinder. And the pipeline connecting the test object module on the secondary pressurization pipeline and the steel cylinder is provided with a three-way joint, the two test object modules on the pressure relief pipeline are connected with the secondary pressurization pipeline through the three-way joint, and the pressure relief valve on the pressure relief pipeline is connected with the main pressurization pipeline. The pressure increasing pipeline and the pressure relief pipeline can carry out consistency measurement on the performance of the same type of electromagnetic valve.
Preferably, the test object module is a normally closed valve test valve block or a normally open valve test valve block.
Preferably, a cylinder pressure sensor is arranged at the input end of the cylinder. The steel cylinder pressure sensor is used for measuring the pressure value in the steel cylinder.
Preferably, the rigidity of the steel cylinder can be changed by adding a filling material.
According to a preferable technical scheme, the motor module comprises a motor and a rotating linear conversion mechanism, the motor is connected with the rotating linear conversion mechanism, and the linear conversion mechanism is connected with the electro-hydraulic servo cylinder. The rotary linear conversion mechanism can convert the rotary motion of the motor rotor into linear motion for pushing the piston of the electro-hydraulic servo cylinder and output required hydraulic pressure.
As a preferred technical scheme, a one-way valve is arranged between the liquid storage bottle and the electro-hydraulic servo cylinder. The check valve has the effect of limiting current and stabilizing flow, the liquid storage bottle supplements brake fluid for the electro-hydraulic servo cylinder by controlling the check valve, and the brake fluid of the electro-hydraulic servo cylinder is limited to flow back to the liquid storage bottle, so that the instability of hydraulic pressure output is avoided.
As a preferred technical scheme, the control chip circuit module comprises an electromagnetic valve control loop, a power supply voltage stabilizing circuit and a control logic function circuit; the electromagnetic valve control loop is used for controlling the on-off of a valve of the test object module, the power supply voltage stabilizing circuit is used for stabilizing the voltage of the control chip circuit module, and the control logic function circuit module is used for processing, calculating and sending control commands of the control chip circuit module.
As a preferred technical scheme, the output end of the electro-hydraulic servo cylinder is provided with a pressure sensor.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the power source module is controlled by the motor, the motor has the characteristics of high response speed and output torque which can be set by a control instruction, and the motor pushes the piston of the electro-hydraulic servo cylinder to build pressure, so that stable and reliable hydraulic source output can be generated, the pressure response is high, and the control precision is high.
2. The hydraulic pipeline is divided into a pressure increasing pipeline and a pressure releasing pipeline, and the pressure increasing pipeline and the pressure releasing pipeline are both provided with two testing pipelines, so that the consistency measurement of the performance of the same electromagnetic valve can be realized, the testing efficiency is high, and the operation is convenient.
3. The general tool for testing the performance of the electromagnetic valve has small volume, can ensure that all brake fluids of a pipeline, a liquid storage tank and the like are in the same temperature state during the performance test of the high-temperature and low-temperature electromagnetic valve, and ensures the test precision.
Drawings
FIG. 1 is a schematic structural diagram of a general tool for testing the performance of an electromagnetic valve in the embodiment of the invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a right side view of FIG. 1;
FIG. 4 is a rear view of FIG. 1;
FIG. 5 is a schematic illustration of the construction of a power source module in an embodiment of the present invention;
FIG. 6 is a schematic view of the structure of the steel cylinder in the embodiment of the present invention;
FIG. 7 is a hydraulic schematic diagram of one single circuit of the general tool for testing the performance of the electromagnetic valve in the embodiment of the invention;
FIG. 8 is another single-circuit hydraulic schematic diagram of the general tool for testing the performance of the solenoid valve in the embodiment of the invention;
FIG. 9 is a schematic structural diagram of a data acquisition and processing module according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a circuit module of a control chip according to an embodiment of the present invention.
Wherein: 1: a power source module; 101: an electro-hydraulic servo cylinder; 102: a motor module; 103: a one-way valve; 104: a liquid storage bottle; 2: a hydraulic line module; 201: a straight hard tube; 202: an L-shaped hard tube; 203: a three-way joint; 204: a two-way joint; 205: a pressure increasing valve; 206: a pressure relief valve; 207: a cylinder pressure sensor; 208: a liquid recovery tank; 209: a steel cylinder; 301 a: a normally open valve test valve block; 301 b: and (4) testing the valve block by a normally closed valve.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
As shown in fig. 1 to 4, a general tool for testing performance of an electromagnetic valve includes a power source module, a hydraulic pipeline module, a test object module, and a data acquisition and processing module. The data acquisition processing module is respectively and electrically connected with the power source module, the hydraulic pipeline module and the test object module.
The power source module comprises an electro-hydraulic servo cylinder, a motor module and a liquid storage bottle. The motor module is connected with the electro-hydraulic servo cylinder and drives the electro-hydraulic servo cylinder to output hydraulic pressure. The motor module comprises a motor and a rotary linear conversion mechanism, the motor is connected with the rotary linear conversion mechanism, and the rotary linear conversion mechanism is connected with the electro-hydraulic servo cylinder. The rotary linear conversion mechanism can convert the rotary motion of the motor rotor into linear motion for pushing the piston of the electro-hydraulic servo cylinder and output required hydraulic pressure. Brake fluid can be added to the liquid adding hole of the liquid storage bottle by opening the knob on the liquid storage bottle. A one-way valve is arranged between the liquid storage bottle and the electro-hydraulic servo cylinder and has the functions of limiting current and stabilizing current. The brake fluid is supplemented to the electro-hydraulic servo cylinder by controlling the opened one-way valve, and the brake fluid of the electro-hydraulic servo cylinder is limited to flow back to the liquid storage bottle, so that the instability of hydraulic pressure output is avoided. And the output end of the electro-hydraulic servo cylinder is provided with a pressure sensor for measuring the output pressure of the power source module.
The hydraulic pipeline module comprises a hydraulic pipeline, a booster valve, a pressure relief valve, a steel cylinder and a liquid recycling barrel. The hydraulic pipeline is divided into a pressure increasing pipeline and a pressure releasing pipeline. The pressure boost pipeline is connected with the electro-hydraulic servo cylinder through a pressure boost valve, and the main pressure boost pipeline is divided into two secondary pressure boost pipelines through a three-way joint behind the pressure boost valve for measuring the consistency of the performance of the electromagnetic valve. The two secondary pressure increasing pipelines are respectively connected with a normally open valve test valve block and a steel cylinder in sequence. The pressure relief pipeline is connected with a normally closed valve test valve block, a pressure relief valve and a liquid recovery barrel in sequence. And a three-way joint is arranged on a pipeline connecting the normally-open valve test valve block and the steel cylinder, two normally-closed valve test valve blocks on the pressure relief pipeline are connected with the secondary pressure boost pipeline through the three-way joint, and a pressure relief valve on the pressure relief pipeline is connected with the main pressure boost pipeline through the three-way joint. The side end holes of the normally open valve test valve block and the normally closed valve test valve block are input ends of hydraulic pipeline brake fluid, and the top end hole is an output end of the hydraulic pipeline brake fluid. The hydraulic pipeline consists of straight hard pipes, L-shaped hard pipes and other shaped pipelines and is connected with the connecting part of the pipelines through a three-way joint and a two-way joint.
The test object module comprises a normally open valve test valve block and a normally closed valve test valve block.
As shown in fig. 9, the data acquisition and processing module includes a control chip circuit module, a data acquisition and display unit, a control command issuing unit, and a power supply module. The power supply module is respectively and electrically connected with the control chip circuit module, the data acquisition and display unit and the control command sending unit and is used for supplying power to other modules. The control chip circuit module is in bidirectional electric connection with the control command sending unit, and the output end of the control command sending unit is connected with the input end of the data acquisition and display unit. The control command sending unit sends a control signal to the control chip circuit module, and the control chip circuit module calls a program according to the command to control the electromagnetic valve, the booster valve, the pressure relief valve, the motor and the like to execute corresponding actions and returns a feedback signal to the control command sending unit. The control command sending unit sends a control signal to the data acquisition and display unit, and the data acquisition and display unit acquires and processes a voltage signal of the steel cylinder pressure sensor and displays a signal curve.
As shown in fig. 10, the control chip circuit module includes a solenoid valve control loop, a power voltage stabilizing circuit and a control logic function circuit. The electromagnetic valve control loop is an execution circuit for controlling the on-off of the electromagnetic valve and is used for controlling the on-off of the valve of the test object module. The power voltage stabilizing circuit is used for stabilizing and controlling the voltage of the chip circuit module. The control logic function circuit is used for processing calculation and sending control commands of the control chip circuit module. The control logic function circuit is connected with an upper computer, and the upper computer is a graphic user interaction input interface program and is arranged and installed on the computer and used for inputting and setting parameters such as opening current, pressurization time and the like of the electromagnetic valve test valve block.
The data acquisition processing module is connected with the power source module through an electric signal, on one hand, the power source module is supplied with power through the power supply module, and on the other hand, the motor of the power source module is controlled to move through the control command sending unit. The data acquisition and analysis module is connected with the hydraulic pipeline module through an electric signal, on one hand, the power supply module supplies power to the booster valve, the pressure relief valve and the steel cylinder pressure sensor, on the other hand, the control command sending unit controls the action of the booster valve and the pressure relief valve, and the data acquisition and display unit acquires the data of the steel cylinder pressure sensor. The data acquisition and analysis module is connected with the test object module through an electric signal, on one hand, the power supply module supplies power to the normally-open valve test valve block or the normally-closed valve test valve block, on the other hand, the control command sending unit controls the action of the test valve block, and the data acquisition and display unit acquires current and voltage data of the test valve block.
As shown in fig. 6, before the test, the rigidity characteristic of the steel cylinder needs to be adjusted and calibrated, and the rigidity of the steel cylinder is changed by adding fillers such as steel balls into the steel cylinder, so that the rigidity of the steel cylinders of different pipelines is kept consistent. Before testing, still need to carry out the exhaust to the pipeline, adjust the rigidity unanimity of the steel bottle of different pipelines, and after power source module given certain output pressure, open pressure-increasing valve and relief valve, last a period until the pressure release pipeline does not have the bubble to discharge.
When testing the high-pressure sealing performance of the normally open valve test valve block, a general tool for testing the performance of the electromagnetic valve is set up as shown in fig. 1. The starting data acquisition processing module sets up the supply voltage of control chip circuit module, inputs the target output pressure of power source module through the host computer, opens the pressure-increasing valve, closes the relief valve to the circular telegram electric current of input normally open valve test valve block coil makes the normally open valve close, reads the pressure value of steel bottle through steel bottle pressure sensor, thereby calculates the leakage volume of normally open valve test valve block. When testing the high-pressure leakproofness of normally closed valve test valve block, according to the general frock of the solenoid valve capability test of building that schematic diagram fig. 9 is shown, be about to normally open valve test valve block and the replacement of normally closed valve test valve block mounted position, start data acquisition and processing module, set up control chip circuit module's supply voltage, set for the initial output pressure of power source module, read the pressure value of steel bottle through steel bottle pressure sensor, because there is certain functional relation in steel bottle pressure value and leakage quantity, the leakage quantity of normally closed valve test valve block is calculated to the accessible pressure value.
The method comprises the steps of testing response time and opening current of a solenoid valve test valve block during power on and power off, building a general tool for testing the performance of the solenoid valve according to the diagram in fig. 1 during power off current, starting a data acquisition and processing module, setting power supply voltage of a control chip circuit module, opening a pressure increasing valve, closing a pressure reducing valve, inputting target output pressure of a power source module, setting input current pulse duty ratio of a solenoid valve test valve block coil through the data acquisition and processing module, and acquiring current signals of the solenoid valve test valve block through a data acquisition and display unit, thereby reading the response time and the opening current and the power off current of the solenoid valve test valve block during power on and power off.
When the control threshold parameters of the electromagnetic valve test valve block under the control logic are tested, such as the control threshold parameters of the opening current, the duty ratio, the time, the holding current, the time and the like, a general tool for testing the performance of the electromagnetic valve is set up according to the diagram in fig. 1, a data acquisition processing module is started, the power supply voltage of a control chip circuit module is set, a booster valve is opened, a pressure relief valve is closed, the target output pressure of a power source module is input, the control parameters of the opening current, the duty ratio, the time, the holding current, the time and the like of the electromagnetic valve test valve block are set, and the current signal of the electromagnetic valve test valve block is acquired through a data acquisition display unit, so that the control threshold parameters of the opening current, the.
The pressure regulating performance of the normally open valve test valve block is tested, a general tool for testing the performance of the electromagnetic valve is built according to the diagram shown in fig. 1, a data acquisition processing module is started, the power supply voltage of a control chip circuit module is set, a pressure increasing valve is opened, a pressure reducing valve is closed, the target output pressure of a power source module is input, control parameters such as the pressure increasing time, the pressure maintaining time and the step pressure increasing number of the normally open valve test valve block are set, the normally closed valve test valve block is kept in an unpowered state, the pressure value of a steel cylinder is read through a steel cylinder pressure sensor, and therefore the pressure regulating performance of the normally. The pressure regulating performance of the normally-closed valve testing valve block is tested, a general tool for testing the performance of the electromagnetic valve is set up according to the diagram in fig. 9, a data acquisition processing module is started, the power supply voltage of a control chip circuit module is set, a pressure increasing valve is opened, a pressure reducing valve is closed, the target output pressure of a power source module is input, control parameters such as pressure reducing time, pressure maintaining time and step pressure reducing number of the normally-closed valve testing valve block are set, the normally-opened valve testing valve block is kept in a power-on state, the pressure value of a steel cylinder is read through a steel cylinder pressure sensor, and therefore the pressure regulating.
When testing the consistency of the performance of the electromagnetic valve test valve block, a general tool for testing the performance of the electromagnetic valve is set up according to a schematic diagram, the rigidity of the steel cylinders is calibrated, the rigidity of the two steel cylinders is kept consistent, the lengths of the hard pipes at all positions of a hydraulic pipeline are consistent, a data acquisition processing module is started, the power supply voltage of a control chip circuit module is set, a pressure increasing valve is opened, a pressure reducing valve is closed, the target output pressure of a power source module is input, control parameters such as power-on time, power-on current, pressure increasing time and pressure maintaining time are set, the pressure value of a steel cylinder pressure sensor is acquired through a data acquisition display unit, and the performance of the electromagnetic.
When testing the performance of the electromagnetic valve test valve block under high and low temperatures, build a general tool for testing the performance of the electromagnetic valve according to the schematic diagram, completely place the general tool for testing the performance of the electromagnetic valve in a high and low temperature box, set the temperature value of the high and low temperature box, after the temperature is kept for a period of time and the temperature is stabilized, start the data acquisition processing module, set the power supply voltage of the control chip circuit module, open the booster valve, close the relief valve, input the target output pressure of the power source module, set the control parameters of the power-on time, the power-on current, the booster time, the pressure-maintaining time and the like, acquire the pressure value of the steel cylinder pressure sensor through the data acquisition display unit, and.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A general tool for testing the performance of an electromagnetic valve is characterized by comprising a power source module, a hydraulic pipeline module, a test object module and a data acquisition and processing module; the data acquisition processing module is respectively and electrically connected with the power source module, the hydraulic pipeline module and the test object module;
the power source module comprises an electro-hydraulic servo cylinder, a motor module and a liquid storage bottle; the motor module is connected with the electro-hydraulic servo cylinder, and the liquid storage bottle is connected with the electro-hydraulic servo cylinder;
the hydraulic pipeline module comprises a hydraulic pipeline, a pressure increasing valve, a pressure reducing valve, a steel cylinder and a liquid recycling barrel, the hydraulic pipeline is divided into the pressure increasing pipeline and the pressure reducing pipeline, the pressure increasing pipeline is sequentially connected with the pressure increasing valve, the test object module and the steel cylinder, and the pressure reducing pipeline is sequentially connected with the test object module, the pressure reducing valve and the liquid recycling barrel; the pressure increasing pipeline is connected with the pressure releasing pipeline; the pressure increasing valve is connected with the electro-hydraulic servo cylinder;
the data acquisition processing module comprises a control chip circuit module, a data acquisition display unit, a control command sending unit and a power supply module; the power supply module is respectively and electrically connected with the control chip circuit module, the data acquisition and display unit and the control command sending unit; the control chip circuit module is in bidirectional electric connection with the control command sending unit; and the output end of the control command sending unit is connected with the input end of the data acquisition and display unit.
2. The general tool for testing the performance of the electromagnetic valve according to claim 1, wherein the pressurizing pipeline is divided into a main pressurizing pipeline and a secondary pressurizing pipeline, the main pressurizing pipeline is divided into two secondary pressurizing pipelines through a tee joint, and each secondary pressurizing pipeline is sequentially connected with a test object module and a steel cylinder.
3. The universal tool for testing the performance of the electromagnetic valve according to claim 2, wherein a tee joint is arranged on a pipeline connecting the test object module on the secondary pressurization pipeline and the steel cylinder, two test object modules on the pressure relief pipeline are connected with the secondary pressurization pipeline through the tee joint, and a pressure relief valve on the pressure relief pipeline is connected with the main pressurization pipeline.
4. The universal tool for testing the performance of the electromagnetic valve according to claim 1, wherein the test object module is a normally-closed valve test valve block or a normally-open valve test valve block.
5. The general tool for testing the performance of the electromagnetic valve according to any one of claims 1 to 4, wherein a steel cylinder pressure sensor is arranged at an input end of the steel cylinder.
6. The universal tool for testing the performance of the electromagnetic valve according to claim 5, wherein the rigidity of the steel cylinder can be changed by adding a filler.
7. The general tool for testing the performance of the electromagnetic valve according to claim 1, wherein the motor module comprises a motor and a rotary linear conversion mechanism, the motor is connected with the rotary linear conversion mechanism, and the linear conversion mechanism is connected with the electro-hydraulic servo cylinder.
8. The general tool for testing the performance of the electromagnetic valve according to claim 1, wherein a check valve is arranged between the liquid storage bottle and the electro-hydraulic servo cylinder.
9. The universal tool for testing the performance of the electromagnetic valve according to claim 1, wherein the control chip circuit module comprises an electromagnetic valve control loop, a power supply voltage stabilizing circuit and a control logic function circuit; the electromagnetic valve control loop is used for controlling the on-off of a valve of the test object module, the power supply voltage stabilizing circuit is used for stabilizing the voltage of the control chip circuit module, and the control logic function circuit module is used for processing, calculating and sending control commands of the control chip circuit module.
10. The universal tool for testing the performance of the electromagnetic valve according to claim 1, wherein the output end of the electro-hydraulic servo cylinder is provided with a pressure sensor.
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