A simulation and monitoring device

Abstract

The present invention belongs to the technical field of electromagnetic compatibility testing of automotive components, and discloses a simulation and monitoring device comprising a mechanical adjustment mechanism and a monitoring unit. The mechanical adjustment mechanism is used to drive the master cylinder piston of the brake domain control unit to move; the monitoring unit is used to collect the pressure of the brake domain control unit. The simulation and monitoring device provided by the present invention uses a mechanical adjustment mechanism to drive the master cylinder piston of the brake domain control unit to move, thereby simulating the brake pedal stepping process. The use of a mechanical adjustment mechanism to replace active components such as motors in the prior art eliminates electromagnetic interference from active components, improves the reliability and accuracy of electromagnetic compatibility testing, and can truly evaluate the electromagnetic noise characteristics of the intelligent brake domain control unit.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic compatibility testing of automobile components, and in particular to a simulation and monitoring device. Background Art

[0002] Electric autonomous vehicles are equipped with an intelligent braking domain control unit, which includes a mechanical structure for controlling the braking structure, an electrical structure for driving the mechanical structure, and a central processing unit stabilization electrical circuit. It is a main control unit that integrates the braking control unit, chassis domain controller, and chassis redundancy controller. The main control unit has a high degree of integration.

[0003] In order to verify whether the integrated design of the intelligent braking domain control unit meets the design expectations of the electromagnetic field electrical characteristics, an electromagnetic compatibility certification test is usually performed on the intelligent braking domain control unit.

[0004] However, during the electromagnetic compatibility certification test of the intelligent braking domain control unit, the pedaling pressure is simulated by using a structure composed of active devices such as motors. Due to the influence of the electromagnetic interference factors of the active devices, the electromagnetic emission collected and captured by the electromagnetic receiver or spectrum analyzer will be significantly weak, and it cannot truly evaluate the electromagnetic noise characteristics of the intelligent braking domain control unit. Summary of the Invention

[0005] The object of the present invention is to provide a simulation and monitoring device capable of truly evaluating the electromagnetic noise characteristics of an intelligent braking domain control unit.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A simulation and monitoring device for electromagnetic compatibility testing, comprising:

[0008] A mechanical adjustment mechanism for driving the master cylinder piston of the brake domain control unit to move;

[0009] The monitoring unit is used to collect the pressure of the braking domain control unit.

[0010] As an optional technical solution of the above simulation and monitoring device, it also includes:

[0011] A pusher connected to the master cylinder piston of the brake domain control unit;

[0012] The base is connected to the housing of the braking domain control unit, and the pushing member can slide back and forth in a first direction relative to the base; the mechanical adjustment mechanism is installed on the base and is used to adjust the relative position of the pushing member and the base.

[0013] As an optional technical solution of the above-mentioned simulation and monitoring device, the mechanical adjustment mechanism includes:

[0014] a lead screw rotatably disposed on the base;

[0015] A slider is threadedly connected to the lead screw, and the pusher is connected to the slider;

[0016] A guide is installed on the base, and the guide guides the slider to slide back and forth along a first direction.

[0017] As an optional technical solution of the above-mentioned simulation and monitoring device, the mechanical adjustment mechanism also includes:

[0018] A manual drive member is used to drive the lead screw to rotate.

[0019] As an optional technical solution of the above-mentioned simulation and monitoring device, the guide member is a guide rod extending along the first direction, and the slider is slidably connected to the guide rod;

[0020] Alternatively, the guide member is a slide groove provided on the base, and the slider is provided with a slide rail extending along the first direction, and the slide rail is slidably connected to the slide groove.

[0021] As an optional technical solution of the above-mentioned simulation and monitoring device, the pushing member is slidably connected to the sliding block in a second direction, and the second direction intersects with the first direction.

[0022] As an optional technical solution of the above-mentioned simulation and monitoring device, the simulation and monitoring device further includes a limiting mechanism, and the limiting mechanism includes:

[0023] an abutment plate, used for limiting the pushing member from moving away from an extreme movement position of the braking domain control unit;

[0024] and a support member, wherein the support member is mounted on the base or the housing of the braking domain control unit, and the abutment plate is connected to the support member.

[0025] As an optional technical solution of the above-mentioned simulation and monitoring device, the abutment plate and the support member are movably connected, and the limiting mechanism further includes:

[0026] A position adjusting member is movably connected to the supporting member, and the position adjusting member adjusts the position of the abutment plate relative to the braking domain control unit.

[0027] As an optional technical solution of the above-mentioned simulation and monitoring device, the limiting mechanism also includes:

[0028] A locking bolt fixes the abutment plate and the support member.

[0029] As an optional technical solution of the above-mentioned simulation and monitoring device, the monitoring unit is a mechanical pressure gauge.

[0030] As an optional technical solution of the above-mentioned simulation and monitoring device, the simulation and monitoring device also includes a load simulation unit, which includes a hydraulic source. The hydraulic source is connected to the output oil port of the braking domain control unit through a connecting pipe, and the connecting pipe is provided with the monitoring unit.

[0031] As an optional technical solution of the above-mentioned simulation and monitoring device, a control valve is provided on the connecting pipe to control the on-off of the connecting pipe.

[0032] As an optional technical solution of the above-mentioned simulation and monitoring device, the connecting pipe is installed with a mounting joint, and the mounting joint is connected to the monitoring unit through a universal joint bolt.

[0033] Beneficial effects of the present invention:

[0034] The simulation and monitoring device provided by this invention uses a mechanical adjustment mechanism to drive the master cylinder piston of the brake domain control unit, simulating the brake pedal application process. This mechanical adjustment mechanism replaces active components such as motors in existing technologies, eliminating electromagnetic interference from active components and improving the reliability and accuracy of electromagnetic compatibility testing. It can accurately evaluate the electromagnetic noise characteristics of intelligent brake domain control units. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of the simulation and monitoring device and the braking domain control unit after assembly provided by the first embodiment of the present invention;

[0036] Figure 2 A schematic structural diagram of a mechanical adjustment mechanism provided in Example 1 of the present invention;

[0037] Figure 3 A schematic diagram of the partial structure of the mechanical adjustment mechanism provided in the first embodiment of the present invention;

[0038] Figure 4 A schematic diagram of the overall structure of the simulation and monitoring device and the braking domain control unit after assembly provided by other embodiments of the present invention;

[0039] Figure 5 A schematic structural diagram of a braking domain control unit provided in the first embodiment of the present invention;

[0040] Figure 6 It is a structural diagram of a load simulation unit provided in the second embodiment of the present invention.

[0041] In the picture:

[0042] 10. Mechanical adjustment mechanism; 11. Base; 111. Guide member; 12. Pushing member; 121. Pushing plate; 122. Mounting plate; 13. Slider; 14. Lead screw; 15. Abutment plate; 16. Support member; 161. Horizontal plate; 1611. Long hole; 162. Vertical plate; 1621. Avoidance hole; 17. Positioning member; 18. Manual drive member; 181. Turntable; 182. Handle; 19. Connecting shaft;

[0043] 20. Monitoring unit;

[0044] 30. Load simulation unit; 31. Steel cylinder; 32. Connecting pipe; 33. First control valve; 34. Second control valve; 35. Mounting frame;

[0045] 40. Braking domain control unit; 401. U-shaped plate; 402. Fixing hole. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0047] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0048] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0050] Example 1

[0051] The brake domain control unit (BCU) is installed behind the brake pedal in the vehicle. The brake pedal is coupled to the intelligent BCU via a transmission unit. When the brake pedal is depressed, the BCU performs logical calculations to output brake pressure. This pressure controls the operation of the brake motor in the BCU, which in turn drives the servo cylinder to push the brake fluid to generate brake pressure. This pressure is then applied to the brake calipers of the vehicle wheels for braking.

[0052] Braking domain control units require electromagnetic compatibility testing. Currently, active components such as motors are used to drive the master cylinder piston of the braking domain control unit to simulate the application of the brake pedal. These active components generate electromagnetic interference, making it difficult to accurately evaluate the electromagnetic noise characteristics of the intelligent braking domain control unit. To address this issue, this embodiment provides a simulation and monitoring device for electromagnetic compatibility testing to address this technical issue.

[0053] Figure 1 It is a schematic diagram of the overall structure of the simulation and monitoring device and the braking domain control unit provided in this embodiment after assembly. Figure 2 This is a schematic diagram of the overall structure of the mechanical adjustment mechanism provided in this embodiment. Figure 3 This is a partial structural diagram of the mechanical adjustment mechanism provided in this embodiment. Figures 1 to 3 As shown, the simulation and monitoring device provided in this embodiment includes a mechanical adjustment mechanism 10 and a monitoring unit 20, wherein the mechanical adjustment mechanism 10 is used to drive the master cylinder piston of the braking domain control unit 40 to move, and the monitoring unit 20 is used to collect the pressure of the braking domain control unit 40.

[0054] A mechanical adjustment mechanism 10 drives the master cylinder piston of the brake domain control unit 40 to simulate the brake pedal application process. By replacing active components such as motors in existing technologies, the mechanical adjustment mechanism 10 eliminates electromagnetic interference from active components, improves the reliability and accuracy of electromagnetic compatibility testing, and enables realistic evaluation of the electromagnetic noise characteristics of the intelligent brake domain control unit 40.

[0055] In order to connect the mechanical adjustment mechanism 10 to the master cylinder piston, the simulation and monitoring device further includes a pusher 12 and a base 11, wherein the pusher 12 is connected to the master cylinder piston of the braking domain control unit 40; the base 11 is connected to the housing of the braking domain control unit 40, and the pusher 12 can move relative to the base 11 in a first direction ( Figure 2 The mechanical adjustment mechanism 10 is mounted on the base 11, and the mechanical adjustment mechanism 10 is used to adjust the relative position of the pusher 12 and the base 11. Exemplarily, the base 11 is connected to the housing of the braking domain control unit 40 by fasteners such as bolts.

[0056] The following combination Figure 2 and Figure 3 The mechanical adjustment mechanism 10 is described in detail.

[0057] The mechanical adjustment mechanism 10 includes a slider 13, a screw 14, and a guide 111. The screw 14 is rotatably mounted on the base 11, the slider 13 is threadedly connected to the screw 14, and the pusher 12 is mounted on the slider 13. The guide 111 is mounted on the base 11, and the guide 111 is slidably connected to the slider 13 along a first direction. The guide 111 can limit the circumferential rotation of the slider 13 around the screw 14, that is, the guide 111 guides the slider 13 to reciprocate along the first direction. It should be noted that the first direction refers to the axial direction of the screw 14. In other embodiments, the mechanical adjustment mechanism 10 can also adopt a gear rack structure, a worm gear structure, etc., which will not be described in detail here.

[0058] When the circumferential rotation of slider 13 is restricted by guide member 111, the rotation of lead screw 14 can drive slider 13 in the first direction, which in turn drives the connected pusher 12 to move the master cylinder piston. During this process, guide member 111 also guides the movement of slider 13, thereby reducing transmission errors in the transmission path from mechanical adjustment mechanism 10 through pusher 12 to the master cylinder piston.

[0059] For example, the lead screw 14 uses a standard lead screw with a stroke of 41 mm to achieve the automatic stroke of the standard brake controller adapted to all national standards. It should be noted that the lead screw 14 selected here is only an example and is not the only choice. A lead screw 14 with a different stroke can be selected according to actual needs.

[0060] Optionally, the lead screw 14 is rotatably connected to the base 11 via a bearing to improve the smoothness of the rotation of the lead screw 14 .

[0061] Optionally, the mechanical adjustment mechanism 10 also includes a manual drive member 18, which is fixed to the lead screw 14 and is used to drive the lead screw 14 to rotate. The manual drive member 18 is used to drive the lead screw 14 to rotate, so as to avoid electromagnetic interference caused by the use of an active drive member. Exemplarily, the manual drive member 18 includes a turntable 181 and a handle 182 connected to the turntable 181. The turntable 181 is fixedly connected to the lead screw 14 and is coaxially arranged with the lead screw 14. The handle 182 is eccentrically arranged with the turntable 181. By manually rotating the handle 182, the turntable 181 can be driven to rotate, so that the turntable 181 drives the lead screw 14 to rotate. In other embodiments, a wrench can also be used. For example, one end of the lead screw 14 forms a structure with a hexagonal cross-section, and the wrench is set on the lead screw 14, so that the lead screw 14 can be driven to rotate by rotating the wrench. The turntable 181 can also be used Figure 4 In other embodiments, to improve the movement accuracy of the master cylinder piston when the lead screw 14 is rotated by the manual drive member 18, the manual drive member 18 can be connected to the lead screw 14 through a transmission unit, such as a gear structure, a belt and pulley structure, etc., which will not be described in detail here.

[0062] Optionally, the guide 111 is a slide groove provided on the base 11, and a slide rail extending along the first direction is provided on the slider 13, and the slide rail and the slide groove are slidably connected. In this way, the guide 111 can be used to limit the circumferential rotation of the slider 13, thereby guiding the movement of the slider 13 along the first direction. Figure 4 As shown, the guide member 111 may also be a guide rod extending along the first direction, and the slider 13 is slidably connected to the guide rod.

[0063] Optionally, the slider 13 is a plate-shaped structure, which is convenient for installing the pusher 12. The pusher 12 includes a push plate 121 arranged above the slider 13, and a mounting plate 122 is provided on the upper surface of the push plate 121. The mounting plate 122 is provided with a Figure 2 The master cylinder piston is connected to a U-shaped plate 401 at its protruding end. The mounting plate 122 is inserted into the U-shaped cavity of the U-shaped plate 401. The pusher 12 is connected to the master cylinder piston by a connecting shaft 19 that passes through the mounting hole and connects its ends to opposite side walls of the U-shaped plate 401. It should be noted that the connecting shaft 19 may be a pin, a bolt, or the like, and is not specifically limited herein.

[0064] Optionally, in order to facilitate the installation of the pusher 12, the pusher 12 is slidably connected to the slider 13 in the second direction, and the second direction is perpendicular to the first direction. It should be noted that in other embodiments, the first direction and the second direction are not limited to being perpendicular, and the two can be intersecting. A waist-shaped through hole is provided on the push plate 121, and the long axis direction of the waist-shaped through hole extends along the second direction. The slider 13 is provided with a threaded hole corresponding to the waist-shaped through hole. A fastener such as a bolt is passed through the waist-shaped through hole and then threadedly connected to the threaded hole to connect the pusher 12 to the slider 13. With such a setting, the position of the pusher 12 in the second direction can be adjusted, so that the mounting plate 122 can be accurately inserted into the U-shaped cavity of the U-shaped plate 401 to connect the pusher 12 to the master cylinder piston. It should be noted that the mechanical adjustment mechanism 10 provided in this embodiment can also adjust the position of the slider 13 relative to the base 11 in the first direction, so that the mounting through hole can be aligned with the mounting holes on the opposite side walls of the U-shaped plate 401, which is convenient for passing the connecting shaft 19.

[0065] Optionally, the simulation and monitoring device further includes a limit mechanism comprising an abutment plate 15 and a support member 16. The abutment plate 15 is used to limit the movement of the pusher 12 in the first direction away from the braking domain control unit 40, to its extreme position. The support member 16 is mounted to the housing of the braking domain control unit 40, with the abutment plate 15 and the support member 16 connected. This arrangement utilizes the abutment plate 15 to achieve mechanical limit, eliminating the need for a limit switch and preventing electromagnetic interference. In other embodiments, the support member 16 may also be mounted to the base 11.

[0066] To adjust the range of movement of the pusher 12 to meet the requirements of different braking domain control units 40, the abutment plate 15 and the support member 16 are flexibly connected. The limiting mechanism also includes a positioning member 17, which is flexibly connected to the support member 16. The positioning member 17 is used to adjust the position of the abutment plate 15 relative to the braking domain control unit 40. Specifically, the positioning member 17 penetrates the support member 16 in a first direction, then inserts into the abutment plate 15 and is rotatably connected to the abutment plate 15. The positioning member 17 is threadedly connected to the support member 16, and the support member 16 guides the abutment plate 15 to slide back and forth in the first direction. When the positioning member 17 is rotated, the positioning member 17 pushes the abutment plate 15 toward the braking domain control unit 40 relative to the abutment member 16 in the first direction. When the positioning member 17 moves away from the braking domain control unit 40 in the first direction, the positioning member 17 pulls the abutment plate 15 away from the braking domain control unit 40. Exemplarily, the positioning member 17 is a bolt, and screwing the positioning member 17 moves the positioning member 17 in the first direction, thereby adjusting the position of the abutment plate 15 in the first direction. Two positioning members 17 are provided, and the two positioning members 17 are arranged at intervals along the second direction to improve the stability when pushing the abutment plate 15 to move.

[0067] More specifically, the support member 16 is shaped plate, the support member 16 includes a horizontal plate 161 and a vertical plate 162, wherein the horizontal plate 161 extends along the first direction and the vertical plate 162 extends along the vertical direction, and the first direction, the second direction and the vertical direction are perpendicular to each other. One end of the horizontal plate 161 is connected to the housing of the braking domain control unit 40 by a fastener, and the other end is fixed to the upper end of the vertical plate 162. The abutment plate 15 is located on the side of the vertical plate 162 facing the braking domain control unit 40. The abutment plate 15 is slidably connected to the horizontal plate 161 along the first direction. The adjusting member 17 passes through the horizontal plate 161 and is inserted into the abutment plate 15 and is rotatably connected to the abutment plate 15. The adjusting member 17 is threadedly connected to the horizontal plate 161.

[0068] To prevent the abutment plate 15 from interfering with the rotational connection between the U-shaped plate 401 and the mounting plate 122, a clearance hole 1621 is provided in the abutment plate 15 to allow the mounting plate 122 to move freely. The abutment plate 15 can abut against the open end surface of the U-shaped plate 401 to limit the movement of the pusher 12 connected to the U-shaped plate 401 in the first direction. In other embodiments, without affecting the installation and operation of other structures, the abutment plate 15 can be configured to abut against the pusher 12 to directly limit the movement of the pusher 12 in the first direction.

[0069] Optionally, the limiting mechanism further includes a locking bolt that secures the abutment plate 15 and the support member 16. Specifically, the horizontal plate 161 is provided with an elongated hole 1611 for receiving the locking bolt and restricting the head of the locking bolt from passing therethrough. The major axis of the elongated hole 1611 is oriented in the first direction. The tail of the locking bolt passes through the elongated hole 1611 and is threadedly locked with the abutment plate 15. By loosening the locking bolt, the abutment plate 15 is slid along the first direction by rotating the positioning member 17, and then tightening the locking bolt to secure the abutment plate 15 to the horizontal plate 161, the position of the abutment plate 15 in the first direction can be adjusted and locked, thereby improving the stability of the abutment plate 15. For example, two elongated holes 1611 are provided, spaced apart along the second direction. The locking bolts correspond one to one with the elongated holes 1611, and the two locking bolts are respectively threadedly connected to the ends of the abutment plate 15 in the second direction.

[0070] Furthermore, the mechanical adjustment mechanism 10 is designed and manufactured using epoxy resin material, so that the rigidity strength of the mechanical adjustment mechanism 10 is similar to that of a real brake pedal.

[0071] Furthermore, monitoring unit 20 is a mechanical pressure gauge. This not only mechanically measures the pressure within braking domain control unit 40, but also allows for intuitive observation of the pressure within braking domain control unit 40 through the mechanical pressure gauge, eliminating the need for an electronic pressure sensor. This avoids electromagnetic interference generated when electronic monitoring units such as electronic pressure sensors collect pressure, as well as abnormal display issues caused by strong electromagnetic interference. For example, monitoring unit 20 is a mechanical pointer-type pressure gauge.

[0072] Optionally, the connecting pipe 32 is a copper pipe, which improves the rigidity of the connecting pipe 32 to meet the safety strength required by the braking pressure.

[0073] Optionally, a bleed valve is provided on the connecting pipe 32. When the braking domain control unit 40 is braked for the first time, the bleed valve is used to discharge the residual gas in the connecting pipe 32 so that the connecting pipe 32 is filled with liquid, thereby achieving full liquid pressure buildup of the braking domain control unit 40.

[0074] Optionally, the connecting tube 32 is equipped with a mounting joint, which is connected to the mechanical pressure gauge via universal joint bolts, enabling the mechanical pointer pressure gauge to rotate 360° around the axis of the mounting joint. During electromagnetic compatibility testing, the mounting angle of the mechanical pointer pressure gauge can be adjusted as needed to facilitate observation of the reading on the mechanical pointer pressure gauge by the tester through a camera. It should be noted that connecting two components via universal joint bolts to achieve 360° rotation of one component is a conventional technique in the art and will not be described in detail here.

[0075] When the simulation and monitoring device provided in this embodiment is used to perform an electromagnetic compatibility test, the braking load can be simulated so that the braking domain control unit 40 is in a maximum electromagnetic emission working condition, so that the electromagnetic anti-interference performance of the braking domain control unit 40 is fully exposed and reflected, and the function of simulating the actual pressure building working condition of the braking domain control unit 40 in the test is realized. At the same time, the simulated electromagnetic noise is lower than the limit requirement of 60dB; and except for the electromagnetic characteristics of the braking domain control unit 40 itself, there are no additional electromagnetic characteristics, thereby improving the reliability of the electromagnetic compatibility test results.

[0076] Furthermore, Figure 5 This is a schematic diagram of the structure of the braking domain control unit provided in this embodiment. Figure 5 As shown, the housing of the braking domain control unit 40 is provided with fixing holes 402 for mounting the braking domain control unit 40 on the vehicle body-in-white via fasteners, for example, bolts and the like.

[0077] Example 2

[0078] When conducting electromagnetic compatibility testing using the solution of Example 1, the brake fluid used in the electromagnetic compatibility test is relatively weakly compressible. Any small displacement of the master cylinder piston due to uncontrollable factors will cause a sudden change in the pressure signal detected by the monitoring unit 20, thereby affecting the test. Furthermore, during the electromagnetic compatibility certification test of the braking domain control unit 40, based on the requirements of recognized standards and specifications for electromagnetic compatibility interference emissions, it is necessary to ensure that the braking domain control unit 40 being verified is operating under the maximum electromagnetic emission level to ensure the reliability and accuracy of the electromagnetic compatibility certification test. Furthermore, during the electromagnetic compatibility certification test of the intelligent braking domain control unit, the electromagnetic compatibility anechoic chamber must maintain an electromagnetic noise limit of less than 6dB. This restricts the ability to simulate a real vehicle driving environment through HIL (hardware in the loop) or physical auxiliary vehicle components collaborating with the intelligent braking domain control unit, making it difficult to operate the intelligent braking domain control unit under the typical maximum electromagnetic emission level. Therefore, the intelligent braking domain control unit is typically tested under a no-load operating condition for electromagnetic compatibility certification testing. However, when conducting electromagnetic compatibility certification tests under no-load conditions, the electromagnetic anti-interference performance cannot be fully exposed, which increases the risk of weakening the electromagnetic anti-interference performance.

[0079] In order to solve the above technical problems and realize that the braking domain control unit 40 is in the maximum electromagnetic emission working state, Figure 6 is a schematic diagram of the structure of the load simulation unit provided in this embodiment, such as Figure 6 As shown, the simulation and monitoring device provided in this embodiment further includes a load simulation unit 30 . The load simulation unit 30 includes a hydraulic source connected to the output oil port of the braking domain control unit 40 via a connecting pipe 32 .

[0080] When the master cylinder piston of the braking domain control unit 40 undergoes a slight displacement due to uncontrollable factors, the hydraulic source will immediately fill the braking domain control unit 40 with fluid, effectively avoiding a sudden change in the oil pressure of the braking domain control unit 40. The hydraulic source fills the braking domain control unit 40 with fluid through the connecting pipe 32 to provide a load to the braking domain control unit 40, stabilize the voltage of the braking domain control unit 40, and put the braking domain control unit 40 in a maximum electromagnetic emission working condition; and the electromagnetic noise is small, which can meet the electromagnetic noise requirements while ensuring that the verified braking domain control unit 40 is in a maximum electromagnetic emission working condition.

[0081] Optionally, the hydraulic source is a steel cylinder 31. The steel cylinder 31 can simulate the hydraulic unit of the automatic caliper, and the deformation coefficient of the steel cylinder 31 is small, which can well solve the problem of the pressure gauge pointer swinging caused by the poor accuracy of the brake domain control unit 40 when the pedal simulator simulates the braking. Among them, the steel cylinder 31 can be designed according to the current largest brake caliper capacity, and the capacity of the steel cylinder 31 can be reduced by adding steel balls into the steel cylinder 31 to adapt to calipers of different types and braking capabilities on the market, thereby improving versatility and applicability. In particular, steel balls are used because the elastic modulus of steel balls is small, and they can well cope with the extrusion of brake hydraulic oil without deformation, ensuring adaptability, while also ensuring the performance of simulated caliper braking.

[0082] Optionally, the braking domain control unit 40 has multiple oil output ports, and multiple steel cylinders 31 are provided. The multiple steel cylinders 31 are connected to the oil output ports of the braking domain control unit 40 one by one through multiple connecting pipes 32. Each connecting pipe 32 is connected to a monitoring unit 20 for detecting the pressure when the braking domain control unit 40 is subjected to an electromagnetic compatibility test. Exemplarily, there are four steel cylinders 31, and each steel cylinder 31 simulates the brake caliper of a wheel. In order to facilitate the installation of the steel cylinders 31, the load simulation unit 30 also includes a mounting frame 35 for mounting the steel cylinders 31. Specifically, the mounting frame 35 includes a frame body with an open top and a top plate that closes the top opening. The top opening is a U-shaped hole set through. There are multiple top openings, and each top opening is provided with a steel cylinder 31. The top plate is then connected to the frame body by fasteners to fix the steel cylinders 31.

[0083] Optionally, a control valve is provided on the connecting pipe 32 for controlling the on-off of the connecting pipe 32 . The control valve can be opened when the load simulation unit 30 needs to be activated.

[0084] Optionally, the control valve includes a first control valve 33 and a second control valve 34 . The connecting pipe 32 between the monitoring unit 20 and the cylinder 31 is provided with the first control valve 33 , and the connecting pipe 32 between the monitoring unit 20 and the braking domain control unit 40 is provided with the second control valve 34 .

[0085] The load simulation unit 30 and the braking domain control unit 40 can be separated for easy storage and transfer. The first control valve 33 is connected to the braking domain control unit 40, and the second control valve 34 is connected to the load simulation unit 30. Before testing, close the first and second control valves 33, 34, and use vacuum-assisted automatic oil filling to fill the load simulation unit 30 and braking domain control unit 40, respectively. After connecting the first and second control valves 33, 34, they are opened again, connecting the oil output ports of the load simulation unit 30 and braking domain control unit 40.

[0086] Optionally, the first control valve 33 and the second control valve 34 are both mechanical valves, such as mechanical switching valves, etc., to avoid electromagnetic interference.

[0087] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A simulation and monitoring device for electromagnetic compatibility testing, characterized in that: The simulation and monitoring device comprises: A mechanical adjustment mechanism (10) for driving the master cylinder piston of the brake domain control unit (40) to move; A monitoring unit (20) for collecting the pressure of the braking domain control unit (40); Also includes: A pusher (12) connected to the master cylinder piston of the braking domain control unit (40); A base (11) is connected to a housing of the braking domain control unit (40), and the pusher (12) can slide back and forth in a first direction relative to the base (11); the mechanical adjustment mechanism (10) is installed on the base (11) and is used to adjust the relative position of the pusher (12) and the base (11); The mechanical adjustment mechanism (10) comprises: a lead screw (14) rotatably disposed on the base (11); A slider (13) is threadedly connected to the lead screw (14), and the pusher (12) is connected to the slider (13); A guide member (111) is mounted on the base (11), and the guide member (111) guides the slider (13) to reciprocate along a first direction; The mechanical adjustment mechanism (10) further comprises: A manual driving member (18) is used for driving the lead screw (14) to rotate.

2. The simulation and monitoring device according to claim 1, characterized in that The guide member (111) is a guide rod extending along the first direction, and the slider (13) is slidably connected to the guide rod; Alternatively, the guide member (111) is a slide groove provided on the base (11), and the slider (13) is provided with a slide rail extending along the first direction, and the slide rail is slidably connected to the slide groove.

3. The simulation and monitoring device according to claim 1, characterized in that The pushing member (12) is slidably connected to the sliding block (13) in a second direction, and the second direction intersects with the first direction.

4. The simulation and monitoring device according to claim 1, characterized in that The simulation and monitoring device further includes a limiting mechanism, which includes: an abutment plate (15) for limiting the pushing member (12) from moving away from an extreme movement position of the braking domain control unit (40); and a support member (16), wherein the support member (16) is mounted on the base (11) or the housing of the braking domain control unit (40), and the abutment plate (15) is connected to the support member (16).

5. The simulation and monitoring device according to claim 4, characterized in that The abutment plate (15) and the support member (16) are movably connected, and the limiting mechanism further comprises: A position adjusting member (17) is movably connected to the support member (16), and the position adjusting member (17) adjusts the position of the abutment plate (15) relative to the braking domain control unit (40).

6. The simulation and monitoring device according to claim 5, characterized in that The limiting mechanism also includes: A locking bolt fixes the abutment plate (15) and the support member (16).

7. The simulation and monitoring device according to any one of claims 1 to 6, characterized in that: The monitoring unit (20) is a mechanical pressure gauge.

8. The simulation and monitoring device according to any one of claims 1 to 6, characterized in that: The simulation and monitoring device further comprises a load simulation unit (30), the load simulation unit (30) comprising a hydraulic source, the hydraulic source being connected to an output oil port of the braking domain control unit (40) via a connecting pipe (32), the connecting pipe (32) being provided with the monitoring unit (20).

9. The simulation and monitoring device according to claim 8, characterized in that The connecting pipe (32) is provided with a control valve for controlling the opening and closing of the connecting pipe (32).

10. The simulation and monitoring device according to claim 8, characterized in that The connecting pipe (32) is provided with a mounting joint, and the mounting joint is connected to the monitoring unit (20) via a universal joint bolt.

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