Test system and method capable of following load EMB actuator

Abstract

The invention discloses a test system and method capable of following a load EMB actuator, and the system simulates the load of parts related to the EMB actuator of a vehicle through a load cylinder module, eliminates the impact on the braking deceleration when a test is carried out on the whole vehicle in the prior art, and improves the test precision. The load cylinder module adjusts the following load pressure of the load cylinder module under the control of the calculation display module to realize load following, so that the calculation display module can be matched with the test module to accurately measure the thrust, displacement and speed of the EMB actuator; according to the invention, the calculation display module can control the test system to carry out corresponding adjustment according to the model of the EMB actuator to be measured, thereby avoiding the manpower and capital cost required for testing on a vehicle, shortening the test period, meeting the test of different EMB actuators, and improving the test efficiency. And the research, development and improvement speed of the EMB actuator is greatly improved.

Description

Technical Field

[0001] The invention belongs to the field of automobile component testing, and in particular relates to a testing system and method for an EMB actuator capable of following a load. Background Art

[0002] With the popularization of new energy vehicles, the technical route of full electronic control has become more and more distinct, but the braking system on the vehicle still relies on hydraulic or pneumatic pressure as the medium travel braking force. This braking form that generates braking energy and then relies on medium conduction to form energy to generate clamping force or thrust is no longer suitable for the needs of electrified vehicle architecture. The electro-mechanical braking system (EMB) uses electric drive components as brake actuators to replace traditional hydraulic or pneumatic brake actuators. It is a new braking concept. There is no brake fluid, small size, fast response, reliable performance, safety and environmental protection. These characteristics make the EMB system have good application prospects and market value.

[0003] During the development and testing of EMB actuators, output force and push-out speed are the two most important core indicators. The greater the output force, the greater the braking force generated by the EMB actuator during braking. The faster the push-out speed, the faster the EMB actuator responds during braking. Since the actuator push rod of the drum brake is connected to the adjustment arm, camshaft, brake drum and brake shoe, the load forces of the above components are not the same, and there is a self-gain braking force during braking, so the load return force is not a linear force, which brings great inconvenience and difficulty to load simulation.

[0004] Most existing test systems test the braking deceleration on vehicles to obtain the relevant parameters of the EMB actuator. However, when testing on vehicles, there are many factors that affect the braking deceleration, which will distort the calculated actuator-related parameters, causing the calculation results to deviate from the actual real data. In addition, testing on vehicles requires a large amount of capital and manpower, and a long test cycle. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a test system and method for an EMB actuator that can follow a load. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0006] In a first aspect, the present invention provides a test system for an EMB actuator capable of following a load, the test system comprising:

[0007] Mobile module, power supply module, calculation and display module, test module, load cylinder module and followable connection module; among which,

[0008] The mobile module is used to provide support for the test system and enable the test system to move;

[0009] The power supply module is used to supply power to the test system;

[0010] The calculation and display module is used to obtain the parameters of the vehicle model to be assembled with the EMB actuator to be tested, and obtain the corresponding curve of displacement and load force according to its own database;

[0011] The test module is used to connect the EMB actuator to be tested, and under the control of the calculation and display module, use its own sensor to test the thrust and displacement of the EMB actuator to be tested, so as to obtain a first signal representing the thrust value and a second signal representing the displacement value;

[0012] The load cylinder module is used to control its own electrically controlled regulating valve to be turned on or off accordingly to adjust its own following load pressure under the control of the calculation and display module according to the displacement and load force corresponding curve and the second signal;

[0013] The followable connection module is used to connect the test module and the load cylinder module, and can adjust the distance between the test module and the load cylinder module;

[0014] The calculation and display module is also used to form a curve of thrust and displacement of the EMB actuator to be tested according to the first signal and the second signal, so as to obtain a test result.

[0015] In one embodiment of the present invention, the computing and display module includes:

[0016] Touch screen, CPU, power module, function switch, ADC and ROM / RAM.

[0017] In one embodiment of the present invention, the vehicle model parameters to which the EMB actuator to be tested needs to be assembled are obtained, and the displacement and load force corresponding curve is obtained according to its own database, including:

[0018] The touch display screen is used to obtain the vehicle model parameters that the EMB actuator to be tested needs to be assembled on; the vehicle model parameters include relevant vehicle parameters and axle brake parameters;

[0019] The CPU is used to obtain the corresponding load thrust according to the vehicle model parameters, and the information in the database in the ROM / RAM is automatically matched according to the load thrust to obtain the corresponding displacement and load force corresponding curve.

[0020] In one embodiment of the present invention, the test module includes:

[0021] Displacement sensor, displacement sensor bracket, pressure sensor, actuator bracket, slide rail and locking mechanism; wherein,

[0022] The displacement sensor is used to collect the push-out displacement of the EMB actuator to be tested;

[0023] The displacement sensor bracket is used to fix and support the displacement sensor;

[0024] The pressure sensor is used to collect the thrust of the EMB actuator to be tested;

[0025] The actuator bracket is used to install and fix the EMB actuator to be tested;

[0026] The slide rail is arranged at the bottom of the actuator bracket so that the actuator bracket can move;

[0027] The locking mechanism is arranged on the slide rail and is used to limit the position of the test module to avoid safety accidents.

[0028] In one embodiment of the present invention, a load cylinder module comprises:

[0029] Cylinder bracket, manual valve, electric control valve and cylinder.

[0030] In one embodiment of the present invention, an electrically controlled regulating valve comprises:

[0031] A first intake solenoid valve, a second intake solenoid valve, a first exhaust solenoid valve, a second exhaust solenoid valve, an air pressure sensor, a first movable block, and a second movable block; wherein,

[0032] The first air intake solenoid valve and the second air intake solenoid valve are normally closed solenoid valves, and the first exhaust solenoid valve and the second exhaust solenoid valve are normally open solenoid valves;

[0033] The first air intake solenoid valve, the first exhaust solenoid valve, the second air intake solenoid valve and the second exhaust solenoid valve are arranged in sequence and at intervals;

[0034] The air pressure sensor is arranged below the first exhaust solenoid valve;

[0035] The first movable block is disposed between the first intake solenoid valve and the first exhaust solenoid valve;

[0036] The second movable block is disposed between the second intake solenoid valve and the second exhaust solenoid valve.

[0037] In one embodiment of the present invention, the load cylinder module, under the control of the calculation and display module, controls its own electronically controlled regulating valve to be turned on or off accordingly according to the displacement and load force corresponding curve and the second signal, so as to adjust its own following load pressure, including:

[0038] The calculation and display module obtains the target load force according to the displacement and load force corresponding curve and the second signal;

[0039] The calculation and display module controls the electronically controlled regulating valve in the load cylinder module to be turned on or off accordingly according to the target load force and the following load pressure of the current load cylinder module, so that the following load pressure of the current load cylinder module is equal to the target load force.

[0040] In a second aspect, the present invention provides a test method for a load-following EMB actuator, which is applied to the test system described in the first aspect, and the test method comprises:

[0041] S1, using a power module to power the test system; installing the EMB actuator to be tested on the test module;

[0042] S2, using the calculation and display module to obtain the parameters of the vehicle model to be assembled with the EMB actuator to be tested, and obtaining the corresponding curve of displacement and load force according to its own database;

[0043] S3, operate the manual valve of the load cylinder module to fully extend the push rod of the cylinder;

[0044] S4, using the followable connection module to adjust the distance between the test module and the load cylinder module so that the distance meets the preset conditions; and using the locking mechanism to limit the test module;

[0045] S5, using the calculation and display module to control the push rod of the EMB actuator to be tested to extend to a preset position;

[0046] S6, using the calculation and display module to control the sensor in the test module to reset, control the EMB actuator to be tested to push out with all its strength to test the thrust and displacement, and obtain a first signal representing the thrust value and a second signal representing the displacement value through the test module; using the calculation and display module to control the electric control valve in the load cylinder module to be turned on or off accordingly according to the displacement and load force corresponding curve and the second signal, so as to adjust the follow-up load pressure of the load cylinder module; using the calculation and display module to form a thrust and displacement curve of the EMB actuator to be tested according to the first signal and the second signal, so as to obtain preliminary test results;

[0047] S7, perform the S test process three times in succession, and determine whether the difference between the three preliminary test results is within a preset range; if so, take the average of the three preliminary test results as the final test result; if not, it is necessary to debug the test system and continue the S test process until the difference between the three preliminary test results is within the preset range, and take the average of the three preliminary test results as the final test result.

[0048] In one embodiment of the present invention, the preset position includes:

[0049] The push rod of the EMB actuator to be tested extends to the corresponding position when the collection end of the thrust sensor in the test module.

[0050] In one embodiment of the present invention, before the step of testing the thrust and displacement, the method further includes:

[0051] After the calculation and display module controls the sensor in the test module to reset, it controls the EMB actuator to be tested to be pushed out slowly, quickly, or not pushed out respectively, and determines whether the push rod of the cylinder of the load cylinder module moves slowly, quickly, or not moves accordingly. If so, the thrust and displacement test steps are performed; if not, the test system is debugged until the push rod of the cylinder of the load cylinder module can follow the EMB actuator to be tested to move accordingly.

[0052] Beneficial effects of the present invention:

[0053] In the solution provided by the present invention, the load cylinder module is used to simulate the load of components related to the EMB actuator of the vehicle, thereby eliminating the influence on the braking deceleration when testing on the whole vehicle in the prior art. The load cylinder module adjusts its own following load pressure under the control of the calculation and display module to achieve load following, so that the calculation and display module can be used in conjunction with the test module to accurately measure the thrust, displacement and speed of the EMB actuator; the calculation and display module of the present invention can control the test system to make corresponding adjustments according to the model of the EMB actuator to be measured, thereby avoiding the manpower and financial costs required for testing on the vehicle, shortening the test cycle to meet the test of different EMB actuators, and greatly improving the research and development and improvement speed of the EMB actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A structural schematic diagram of a test system capable of following a load EMB actuator provided by an embodiment of the present invention;

[0055] Figure 2 A schematic diagram of a test system for a load-following EMB actuator provided by an embodiment of the present invention;

[0056] Figure 3 A schematic diagram of a computing and display module provided by an embodiment of the present invention;

[0057] Figure 4 A displacement and load force corresponding curve diagram provided by an embodiment of the present invention;

[0058] Figure 5A schematic diagram of an electrically controlled regulating valve 53 of a load cylinder module provided in an embodiment of the present invention;

[0059] Figure 6 A flow chart of regulating an electrically controlled regulating valve 53 of a load cylinder module provided by an embodiment of the present invention;

[0060] Figure 7 A schematic diagram of the steps of a method for testing a load-following EMB actuator provided by an embodiment of the present invention.

[0061] Reference numerals

[0062] 1 mobile module, 2 power supply module, 3 calculation display module, 4 test module, 5 load cylinder module, 6 followable connection module, 7 EMB actuator to be tested, 11 first air inlet, 12 second air inlet, 13 spare air inlet, 21 first air outlet, 22 second air outlet, 23 spare air outlet, 31 exhaust port, 41 displacement sensor, 42 displacement sensor bracket, 43 pressure sensor, 44 actuator bracket, 4 5-slider lock block, 46-slide rail end stopper, 51-cylinder bracket, 52-manual valve, 53-electrically controlled regulating valve, 54-cylinder, a-intake solenoid valve coil, b-intake solenoid valve return spring, c-intake solenoid valve iron core, d-intake solenoid valve air pressure valve core, e-air pressure sensor, f-first movable block, g-second movable block, h-exhaust solenoid valve air pressure valve core, i-exhaust solenoid valve coil, j-exhaust solenoid valve return spring, k-exhaust solenoid valve iron core. DETAILED DESCRIPTION

[0063] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0064] The embodiment of the present invention provides a test system and method for an EMB actuator capable of following a load.

[0065] Below, firstly, a test system for a load-following EMB actuator provided by an embodiment of the present invention is introduced.

[0066] In a first aspect, an embodiment of the present invention provides a test system capable of following a load EMB actuator, such as Figure 1 As shown, it may include:

[0067] Mobile module 1, power supply module 2, calculation and display module 3, test module 4, load cylinder module 5 and followable connection module 6; wherein,

[0068] The mobile module 1 is used to provide support for the test system and enable the test system to move;

[0069] The power supply module 2 is used to supply power to the test system;

[0070] The calculation and display module 3 is used to obtain the parameters of the vehicle model to be assembled with the EMB actuator 7 to be tested, and obtain the corresponding curve of displacement and load force according to its own database;

[0071] The test module 4 is used to connect to the EMB actuator 7 to be tested, and under the control of the calculation and display module 3, use its own sensor to test the thrust and displacement of the EMB actuator 7 to be tested, and obtain a first signal representing the thrust value and a second signal representing the displacement value;

[0072] The load cylinder module 5 is used to control its own electrically controlled regulating valve 53 to be turned on or off accordingly to adjust its own following load pressure according to the displacement and load force corresponding curve and the second signal under the control of the calculation and display module 3;

[0073] The followable connecting module 6 is used to connect the test module 4 and the load cylinder module 5, and can adjust the distance between the test module 4 and the load cylinder module 5;

[0074] The calculation and display module 3 is further used to form a curve of thrust and displacement of the EMB actuator 7 to be tested according to the first signal and the second signal, so as to obtain a test result.

[0075] In view of the shortcomings of the prior art, an embodiment of the present invention provides a test system for a load-following EMB actuator, which can simulate the braking-related components of a vehicle, especially the return force of the adjustment arm, camshaft and brake drum connected to the EMB actuator, so as to simulate the braking return conditions of a real vehicle. The test system for a load-following EMB actuator can collect the thrust and displacement of the EMB actuator 7 to be tested, and then obtain the output force and push-out speed of the EMB actuator 7 to be tested, and record them using the test system to form a curve of displacement and braking force, which is convenient for R&D personnel to perform intuitive measurements.

[0076] Due to the wide variety of vehicles, axles, adjustment arms, camshafts and brake drums are also different, so the test system has the ability to follow the load, so that it can simulate the brake component return force and load conditions of more vehicles. For the research and development of EMB actuators, a test system can be adapted to multiple types of vehicles and axle specifications.

[0077] The schematic diagram of a test system for a load-following EMB actuator provided by an embodiment of the present invention can be found in Figure 2 , for ease of understanding, the following is combined Figure 1 and Figure 2 Each module of a test system for a load-following EMB actuator proposed in an embodiment of the present invention is introduced in detail.

[0078] Mobile Module

[0079] The mobile module 1 can be used to provide support for the test system and enable the test system to be movable, so as to facilitate the arrangement and movement at a suitable location, thereby more conveniently obtaining the supply of gas and electricity. Figure 1 It can be seen from the figure that the mobile module 1 is arranged at the bottom of the test system, and the pulley installed below the mobile module 1 can realize the movement of the entire test system.

[0080] Power supply module

[0081] The power supply module 2 can be used to supply power to the test system. Figure 1 As can be seen in the figure, the power supply module 2 is arranged on the mobile module 1, and can control the opening and closing of the test system. The power supply module can convert 220V AC into 5V DC, thereby providing 5V DC power for the test system.

[0082] Computational Display Module

[0083] Calculation display module 3, such as Figure 3 As shown, it may include:

[0084] Touch screen, CPU, power module, function switch, ADC and ROM / RAM.

[0085] It can be understood that the touch display screen can obtain the parameters of the vehicle model to be assembled by the user's touch input, and can also display the final test results. The CPU can be used to process the various received data accordingly. The function switch can control the working state of the calculation display module 3 to achieve various corresponding functions. The ADC can be used to convert the received analog signal into a digital signal. The ROM / RAM can be used to pre-store a database so that the CPU can automatically match the information in the database in the ROM / RAM according to the load thrust to obtain the corresponding displacement and load force corresponding curve.

[0086] The calculation and display module 3 can be used to obtain the parameters of the vehicle model to be assembled with the EMB actuator 7 to be tested, and obtain the displacement and load force corresponding curve according to its own database; specifically, the displacement and load force corresponding curve can be found in Figure 4 ,from Figure 4It can be clearly seen from the curve shown that 0-10mm corresponds to the load of the adjustment arm, and the corresponding load force is between 0-150N; 10-25mm corresponds to the load of the adjustment arm + camshaft, and the corresponding load force is between 150-320N; 25-39mm corresponds to the load of the adjustment arm + camshaft + brake drum, and the corresponding load force is between 320-450N. The calculation and display module 3 can also be used to form a curve of thrust and displacement of the EMB actuator 7 to be tested according to the first signal and the second signal, so as to obtain the test result.

[0087] Specifically, the calculation and display module 3 obtains the parameters of the vehicle model to be assembled with the EMB actuator 7 to be tested, and obtains the corresponding curve of displacement and load force according to its own database, which may include:

[0088] The touch screen is used to obtain the vehicle model parameters that the EMB actuator 7 to be tested needs to be equipped with; the vehicle model parameters include relevant vehicle parameters and axle brake parameters;

[0089] The CPU is used to obtain the corresponding load thrust according to the vehicle model parameters, and the information in the database in ROM / RAM is automatically matched according to the load thrust to obtain the corresponding displacement and load force corresponding curve.

[0090] It can be understood that the mapping relationship table of the load thrust corresponding to different vehicle model parameters and the displacement corresponding to the load thrust can be stored in the ROM / RAM database in advance. When it is used specifically, it is only necessary to query the corresponding load thrust and displacement mapping relationship table pre-stored in the database by looking up the table according to the vehicle model parameters that the EMB actuator 7 to be tested needs to be assembled, and obtain the corresponding displacement and load force corresponding curve, which is used for the subsequent process of obtaining the target load force through the displacement and load force corresponding curve. The specific process of the calculation and display module 3 obtaining the test result will be described in detail in the subsequent introduction of the test module 4.

[0091] When the calculation and display module 3 obtains the first signal representing the thrust value and the second signal representing the displacement value obtained by the sensor in the test module 4, the first signal and the second signal are converted into digital form using its own ADC module to obtain the corresponding pressure sensor signal and displacement sensor signal. The CPU processes the obtained pressure sensor signal and displacement sensor signal, and searches for the displacement sensor signal corresponding to the target load force corresponding to the displacement and load force corresponding curve; according to the difference between the target load force and the follow-up load pressure of the current load cylinder module 5, a corresponding control signal is output to control the electronically controlled regulating valve 53 in the load cylinder module 5 to be turned on or off accordingly, so that the follow-up load pressure of the current load cylinder module is equal to the target load force.

[0092] Test Module

[0093] Test module 4, such as Figure 2 As shown, this may include:

[0094] Displacement sensor 41, displacement sensor bracket 42, pressure sensor 43, actuator bracket 44, slide rail and locking mechanism; wherein,

[0095] The displacement sensor 41 is used to collect the push-out displacement of the EMB actuator 7 to be tested;

[0096] The displacement sensor bracket 42 is used to fix and support the displacement sensor 41;

[0097] The pressure sensor 43 is used to collect the thrust of the EMB actuator 7 to be tested;

[0098] The actuator bracket 44 is used to install and fix the EMB actuator 7 to be tested;

[0099] The slide rail is disposed at the bottom of the actuator bracket 44 to enable the actuator bracket 44 to move;

[0100] The locking mechanism is arranged on the slide rail and is used to limit the test module 4 to avoid safety accidents.

[0101] It can be understood that the test module 4 is connected to the EMB actuator 7 to be tested through the actuator bracket 44 to fix the EMB actuator 7 to be tested. Under the control of the calculation and display module 3, the test module 4 uses its own sensor to test the thrust and displacement of the EMB actuator 7 to be tested, and obtains a first signal representing the thrust value and a second signal representing the displacement value.

[0102] Specifically, the calculation and display module 3 controls the EMB actuator 7 to be tested to push out with all its strength to perform thrust and displacement tests; the test module 4 uses the pressure sensor 43 to test the thrust of the EMB actuator 7 to be tested to obtain a first signal representing the thrust value, and uses the displacement sensor 41 to test the displacement of the EMB actuator 7 to be tested to obtain a second signal representing the displacement value; based on the measured first signal and the second signal, a curve of the thrust and displacement of the EMB actuator 7 to be tested can be formed as a test result.

[0103] Specifically, the locking mechanism may include: a slider lock block 45 and a slide rail end block 46; wherein,

[0104] The slider lock block 45 can be used to provide a clamping force to lock the actuator bracket 44 on the slide rail after the distance between the test module 4 and the load cylinder module 5 is adjusted, and provide additional fastening force to prevent the actuator bracket 44 from moving during the test process to affect the test results;

[0105] The end stopper 46 of the slide rail can be used to prevent the test module from accidentally falling off the slide rail when adjusting the distance between the test module 4 and the load cylinder module 5, thereby preventing a safety accident.

[0106] Load cylinder module

[0107] The load cylinder module 5 may include:

[0108] Cylinder support 51 , manual valve 52 , electric control regulating valve 53 and cylinder 54 .

[0109] Specifically, the cylinder bracket 51 can provide installation space for the manual valve 52 , the electric control regulating valve 53 and the cylinder 54 , and is connected to the mobile module 1 .

[0110] The manual valve 52 can operate the push rod of the cylinder 54 to perform push-out or return operations.

[0111] The electronically controlled regulating valve 53 can be turned on or off accordingly under the control of the calculation and display module 3 to adjust the corresponding follow-up load pressure of the cylinder 54 .

[0112] The electric control valve 53, such as Figure 5 As shown, this may include:

[0113] A first intake solenoid valve, a second intake solenoid valve, a first exhaust solenoid valve, a second exhaust solenoid valve, an air pressure sensor e, a first movable block f and a second movable block g; wherein,

[0114] The first air intake solenoid valve and the second air intake solenoid valve are normally closed solenoid valves, and the first exhaust solenoid valve and the second exhaust solenoid valve are normally open solenoid valves;

[0115] The first air intake solenoid valve, the first air exhaust solenoid valve, the second air intake solenoid valve and the second air exhaust solenoid valve are arranged in sequence and at intervals;

[0116] The air pressure sensor e is arranged below the first exhaust solenoid valve;

[0117] The first movable block f is arranged between the first intake solenoid valve and the first exhaust solenoid valve;

[0118] The second movable block g is arranged between the second intake solenoid valve and the second exhaust solenoid valve.

[0119] from Figure 5It can be seen that for any one of the first intake solenoid valve and the second intake solenoid valve, it can be composed of an intake solenoid valve coil a, an intake solenoid valve return spring b, an intake solenoid valve iron core c and an intake solenoid valve air pressure valve core d; wherein the intake solenoid valve iron core c is arranged along the central axis of the intake solenoid valve, the intake solenoid valve coil a is arranged on the periphery of the intake solenoid valve iron core c, the intake solenoid valve return spring b is arranged above the intake solenoid valve iron core c, and the intake solenoid valve air pressure valve core d is arranged below the intake solenoid valve iron core c. The air pressure sensor e is used to measure the air pressure inside the electronically controlled regulating valve 53. For any one of the first exhaust solenoid valve and the second exhaust solenoid valve, it can be composed of an exhaust solenoid valve air pressure valve core h, an exhaust solenoid valve coil i, an exhaust solenoid valve return spring j and an exhaust solenoid valve iron core k; wherein the exhaust solenoid valve iron core k is arranged along the central axis of the exhaust solenoid valve, the exhaust solenoid valve coil i is arranged on the periphery of the exhaust solenoid valve iron core k, the exhaust solenoid valve return spring j is arranged below the exhaust solenoid valve iron core k, and the exhaust solenoid valve air pressure valve core h is arranged below the exhaust solenoid valve coil i. Figure 5 It can be seen that the first air inlet 11 and the second air inlet 12 are symmetrically arranged on both sides of the electric control regulating valve 53, and are respectively connected to the first air inlet solenoid valve and the second air inlet solenoid valve; the first air inlet 11 and the second air inlet 12 are both connected to the gas source to obtain high-pressure gas. The first air outlet 21 and the second air outlet 22 are arranged on both sides of the electric control regulating valve 53, and are respectively connected to the first exhaust solenoid valve and the second exhaust solenoid valve, and the first air outlet 21 and the second air outlet 22 are both connected to the cylinder 54. The exhaust port 31 is arranged below the first exhaust solenoid valve and the second exhaust solenoid valve, leading to the atmosphere, so as to discharge the internal high-pressure gas into the atmosphere. The spare air inlet 13 is arranged below the first air outlet 21 as a backup of the air inlet, and produces an air intake function when other air inlets fail; the spare air outlet 23 is arranged below the second air outlet 22 as a backup of the air outlet, and produces an air outlet function when other air outlets fail.

[0120] The air cylinder 54 can be used to provide a gentle load force to avoid damage to the entire test system due to operating errors during testing, and the air cylinder 54 is a lower-cost load method compared to the electric cylinder. The air cylinder 54 can adjust the air pressure through the control of the electronically controlled regulating valve 53 to achieve load following.

[0121] The working state table of the electronically controlled regulating valve is shown in Table 1 Working state table of the electronically controlled pressure regulating valve.

[0122] Table 1 Working status of electronically controlled pressure regulating valve

[0123]

[0124] It can be understood that under the control of the calculation and display module 3, the load cylinder module 5 controls its own electrically controlled regulating valve 53 to be turned on or off accordingly according to the displacement and load force corresponding curve and the second signal to adjust its own following load pressure, which may specifically include:

[0125] The calculation and display module 3 obtains the target load force according to the displacement-load force corresponding curve and the second signal;

[0126] The calculation and display module 3 controls the electronically controlled regulating valve 53 in the load cylinder module 5 to be turned on or off accordingly according to the target load force and the following load pressure of the current load cylinder module 5, so that the following load pressure of the current load cylinder module 5 is equal to the target load force.

[0127] It can be seen from Table 1 that in the process in which the calculation and display module 3 obtains the target load force according to the second signal and the displacement-load force corresponding curve and controls the electronically controlled regulating valve 53 in the load cylinder module 5 to be turned on or off accordingly, the specific control process is as follows: Figure 6 As shown, this may include:

[0128] Get the target load force and judge the size of the follower load pressure and the target load force:

[0129] If the current follow-up load pressure of the load cylinder module is less than the target load force, the first intake solenoid valve and the second intake solenoid valve are energized, and the first exhaust solenoid valve and the second exhaust solenoid valve are energized, so that the high-pressure gas output by the gas source enters the cylinder 54 through the air inlet of the load cylinder module 5, so as to increase the current follow-up load pressure to the target load force;

[0130] If the current following load pressure of the load cylinder module is greater than the target load force, the first intake solenoid valve and the second intake solenoid valve are controlled to be powered off, and the first exhaust solenoid valve and the second exhaust solenoid valve are controlled to be powered off, so that the high-pressure gas in the load cylinder module 5 is discharged through the exhaust port of the load cylinder module 5 to reduce the current following load pressure to the target load force;

[0131] If the following load pressure of the current load cylinder module is equal to the target load force, the first intake solenoid valve and the second intake solenoid valve are controlled to be de-energized, and the first exhaust solenoid valve and the second exhaust solenoid valve are controlled to be energized, so that the intake and exhaust ports of the load cylinder module 5 are both closed to keep the following load pressure unchanged.

[0132] Follow-up connection module

[0133] The connection module 6 can be followed as Figure 1 As shown, it is arranged between the test module 4 and the load cylinder module 5, can be used to connect the test module 4 and the load cylinder module 5, and can adjust the distance between the test module 4 and the load cylinder module 5.

[0134] Specifically, since the thrust of the EMB actuator is above 20000N, the followable connection module 6 proposed in the embodiment of the present invention uses 4 screw rods for tensioning to meet the use strength. When adjusting the distance between the test module 4 and the load cylinder module 5, the distance can be made to meet the requirement that the EMB actuator 7 to be tested can push against the push rod of the cylinder 54 when it is pushed out, and at least 20mm of travel margin is left as the collection travel of the displacement sensor 41.

[0135] The embodiment of the present invention simulates the load of components related to the EMB actuator of the vehicle through the load cylinder module, eliminating the influence on the braking deceleration when testing on the whole vehicle in the prior art. The load cylinder module adjusts its own following load pressure under the control of the calculation and display module to achieve load following, so that the calculation and display module can be used in conjunction with the test module to accurately measure the thrust, displacement and speed of the EMB actuator; the calculation and display module of the present invention can control the test system to make corresponding adjustments according to the model of the EMB actuator to be measured, thereby avoiding the manpower and financial costs required for testing on the vehicle, shortening the test cycle to meet the testing of different EMB actuators, and greatly improving the research and development and improvement speed of the EMB actuator.

[0136] In a second aspect, corresponding to the above system embodiment, the embodiment of the present invention further provides a method for testing a load-following EMB actuator, such as Figure 7 As shown, the method may include:

[0137] S1, using the power module 2 to power the test system; installing the EMB actuator 7 to be tested on the test module 4;

[0138] S2, using the calculation and display module 3 to obtain the parameters of the vehicle model to be assembled with the EMB actuator 7 to be tested, and obtaining the corresponding curve of displacement and load force according to its own database;

[0139] S3, operate the manual valve 52 of the load cylinder module 5 to fully extend the push rod of the cylinder 54;

[0140] S4, using the followable connection module 6 to adjust the distance between the test module 4 and the load cylinder module 5 so that the distance meets the preset condition;

[0141] S5, using the calculation and display module 3 to control the push rod of the EMB actuator 7 to be tested to extend to a preset position;

[0142] S6, using the calculation and display module 3 to control the sensor in the test module 4 to reset, control the EMB actuator 7 to be tested to push out with all its strength to test the thrust and displacement, and obtain a first signal representing the thrust value and a second signal representing the displacement value through the test module 4; using the calculation and display module 3 to control the electric control valve 53 in the load cylinder module 5 to be turned on or off accordingly according to the displacement and load force corresponding curve and the second signal, so as to adjust the follow-up load pressure of the load cylinder module 5; using the calculation and display module 3 to form a thrust and displacement curve of the EMB actuator 7 to be tested according to the first signal and the second signal, thereby obtaining a preliminary test result;

[0143] S7, perform the test process of S6 three times in succession, and determine whether the difference between the three preliminary test results is within the preset range; if so, take the average of the three preliminary test results as the final test result; if not, the test system needs to be debugged, and the test process of S6 is continued until the difference between the three preliminary test results is within the preset range, and take the average of the three preliminary test results as the final test result.

[0144] Specifically, the preset location may include:

[0145] The corresponding position when the push rod of the EMB actuator 7 to be tested extends to the collection end of the thrust sensor in the test module 4.

[0146] Before the thrust and displacement test steps are performed, the following steps may also be included:

[0147] After the calculation and display module 3 controls the sensor in the test module 4 to reset, it controls the EMB actuator 7 to be tested to be pushed out slowly, quickly, or not pushed out respectively, and determines whether the cylinder 54 push rod of the load cylinder module 5 moves slowly, quickly, or not moves accordingly. If so, the thrust and displacement test steps are performed; if not, the test system is debugged until the cylinder 54 push rod of the load cylinder module 5 can follow the EMB actuator 7 to be tested to move accordingly.

[0148] The embodiment of the present invention uses a load cylinder module to simulate the load of components related to the EMB actuator of the vehicle, eliminating the influence on the braking deceleration when testing on the whole vehicle in the prior art. The load cylinder module adjusts its own follow-up load pressure under the control of the calculation and display module to achieve load following, so that the thrust, displacement and speed of the EMB actuator can be accurately measured by using the calculation and display module in conjunction with the test module; the calculation and display module of the present invention can control the test system to make corresponding adjustments according to the model of the EMB actuator to be measured, thereby avoiding the manpower and financial costs required for testing on the vehicle, shortening the test cycle to meet the testing of different EMB actuators, and greatly improving the research and development and improvement speed of the EMB actuator. Furthermore, by adding the above steps before the steps of thrust and displacement testing, it is equivalent to adding a verification step to determine whether the test system is normal before the formal test steps, which can eliminate the possibility of failure of the test system and make the test results obtained later more accurate.

[0149] It should be noted that in the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0150] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A test system capable of following a load EMB actuator, characterized in that: include: A moving module (1), a power supply module (2), a calculation and display module (3), a test module (4), a load cylinder module (5) and a followable connection module (6); wherein, The mobile module (1) is used to provide support for the test system and enable the test system to move; The power supply module (2) is used to supply power to the test system; The calculation and display module (3) is used to obtain the parameters of the vehicle model to be assembled with the EMB actuator (7) to be tested, and obtain the corresponding curve of displacement and load force according to its own database; The testing module (4) is used to connect to the EMB actuator (7) to be tested, and under the control of the calculation and display module (3), use its own sensor to test the thrust and displacement of the EMB actuator (7) to obtain a first signal representing the thrust value and a second signal representing the displacement value; The load cylinder module (5) is used to control its own electrically controlled regulating valve (53) to be turned on or off accordingly according to the displacement and load force corresponding curve and the second signal under the control of the calculation and display module (3), so as to adjust its own following load pressure; The followable connection module (6) is used to connect the test module (4) and the load cylinder module (5), and is capable of adjusting the distance between the test module (4) and the load cylinder module (5); The calculation and display module (3) is also used to form a curve of thrust and displacement of the EMB actuator (7) to be tested according to the first signal and the second signal, thereby obtaining a test result.

2. A test system for a load-following EMB actuator according to claim 1, characterized in that: The calculation and display module (3) comprises: Touch screen, CPU, power module, function switch, ADC and ROM / RAM.

3. A test system for a load-following EMB actuator according to claim 2, characterized in that: The method of obtaining the parameters of the vehicle model to which the EMB actuator (7) to be tested needs to be assembled and obtaining the corresponding curve of displacement and load force according to its own database includes: The touch display screen is used to obtain vehicle model parameters on which the EMB actuator (7) to be tested needs to be assembled; the vehicle model parameters include relevant vehicle parameters and axle brake parameters; The CPU is used to obtain the corresponding load thrust according to the vehicle model parameters, and the information in the database in the ROM / RAM is automatically matched according to the load thrust to obtain the corresponding displacement and load force corresponding curve.

4. The test system of the load-following EMB actuator according to claim 1, characterized in that: The test module (4) comprises: A displacement sensor (41), a displacement sensor bracket (42), a pressure sensor (43), an actuator bracket (44), a slide rail and a locking mechanism; wherein: The displacement sensor (41) is used to collect the push-out displacement of the EMB actuator (7) to be tested; The displacement sensor bracket (42) is used to fix and support the displacement sensor (41); The pressure sensor (43) is used to collect the thrust of the EMB actuator (7) to be tested; The actuator bracket (44) is used to install and fix the EMB actuator (7) to be tested; The slide rail is arranged at the bottom of the actuator bracket (44) so ​​that the actuator bracket (44) can move; The locking mechanism is arranged on the slide rail and is used to limit the position of the test module (4) to avoid safety accidents.

5. The test system of the load-following EMB actuator according to claim 1, characterized in that: The load cylinder module (5) comprises: A cylinder support (51), a manual valve (52), an electric control regulating valve (53) and a cylinder (54).

6. A test system for a load-following EMB actuator according to claim 5, characterized in that: The electrically controlled regulating valve (53) comprises: A first air intake solenoid valve, a second air intake solenoid valve, a first exhaust solenoid valve, a second exhaust solenoid valve, an air pressure sensor (e), a first movable block (f) and a second movable block (g); wherein, The first air intake solenoid valve and the second air intake solenoid valve are normally closed solenoid valves, and the first exhaust solenoid valve and the second exhaust solenoid valve are normally open solenoid valves; The first air intake solenoid valve, the first exhaust solenoid valve, the second air intake solenoid valve and the second exhaust solenoid valve are arranged in sequence and at intervals; The air pressure sensor (e) is arranged below the first exhaust solenoid valve; The first movable block (f) is arranged between the first intake solenoid valve and the first exhaust solenoid valve; The second movable block (g) is disposed between the second intake solenoid valve and the second exhaust solenoid valve.

7. A test system for a load-following EMB actuator according to claim 6, characterized in that: The load cylinder module (5), under the control of the calculation and display module (3), controls its own electrically controlled regulating valve (53) to be turned on or off accordingly according to the displacement and load force corresponding curve and the second signal, so as to adjust its own following load pressure, including: The calculation and display module (3) obtains the target load force according to the displacement-load force correspondence curve and the second signal; The calculation display module (3) controls the electronically controlled regulating valve (53) in the load cylinder module (5) to be turned on or off accordingly according to the target load force and the follow-up load pressure of the current load cylinder module (5), so that the follow-up load pressure of the current load cylinder module is equal to the target load force.

8. A method for testing a load-following EMB actuator, characterized in that: Applied to any one of the test systems of claims 1 to 7, the test method comprises: S1, using a power module (2) to supply power to the test system; installing an EMB actuator (7) to be tested on the test module (4); S2, using the calculation and display module (3) to obtain the parameters of the vehicle model to be assembled with the EMB actuator (7) to be tested, and obtaining the corresponding curve of displacement and load force according to its own database; S3, operate the manual valve (52) of the load cylinder module (5) to fully extend the push rod of the cylinder (54); S4, using the followable connection module (6) to adjust the distance between the test module (4) and the load cylinder module (5) so that the distance meets a preset condition; and using a locking mechanism to limit the position of the test module (4); S5, using the calculation display module (3) to control the push rod of the EMB actuator (7) to be tested to extend to a preset position; S6, using the calculation and display module (3) to control the sensor in the test module (4) to reset, controlling the EMB actuator (7) to be tested to push out with full force to test the thrust and displacement, and obtaining a first signal representing the thrust value and a second signal representing the displacement value through the test module (4); using the calculation and display module (3) to control the electric control valve (53) in the load cylinder module (5) to be turned on or off accordingly according to the displacement and load force corresponding curve and the second signal, so as to adjust the follow-up load pressure of the load cylinder module (5); using the calculation and display module (3) to form a thrust and displacement curve of the EMB actuator (7) to be tested according to the first signal and the second signal, thereby obtaining a preliminary test result; S7, perform the test process of S6 three times in succession, and determine whether the difference between the three preliminary test results is within the preset range; if so, take the average of the three preliminary test results as the final test result; if not, it is necessary to debug the test system and continue the test process of S6 until the difference between the three preliminary test results is within the preset range, and take the average of the three preliminary test results as the final test result.

9. A test system for a load-following EMB actuator according to claim 8, characterized in that: The preset position includes: The corresponding position when the push rod of the EMB actuator (7) to be tested extends to the collection end of the thrust sensor in the test module (4).

10. The test system of the load-following EMB actuator according to claim 8, characterized in that: Before the step of performing the thrust and displacement test, the method further includes: After the calculation display module (3) controls the sensor in the test module (4) to reset, it controls the EMB actuator (7) to be tested to be pushed out slowly, pushed out quickly, or not pushed out respectively, and determines whether the push rod of the cylinder (54) of the load cylinder module (5) moves slowly, moves quickly, or does not move accordingly. If so, the thrust and displacement test steps are performed; if not, the test system is debugged until the push rod of the cylinder (54) of the load cylinder module (5) can follow the EMB actuator (7) to be tested to move accordingly.

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