New energy automobile electric compressor EOL performance test equipment

Abstract

The invention relates to the technical field of automobile compressor testing, in particular to new energy automobile electric compressor EOL performance testing equipment which comprises a testing machine table used for testing performance parameters such as voltage and load in a compressor, and an equipment set used for fixing the compressor, a full-automatic wiring robot module and a controller are arranged in the bottom of the testing machine table. The full-automatic wiring robot module comprises a mechanical arm carrying a machine vision camera and a probe group arranged at the tail end of the mechanical arm; the controller drives the mechanical arm to control the probe set to complete wiring of the compressor wiring end according to the positioning result of the machine vision camera. Through linkage control of machine vision and the magnetic type probe, the mechanical arm carrying the high-resolution industrial camera and the infrared light supplementing lamp is used for recognizing the position of a compressor interface, automatic adsorption butt joint is combined with the magnetic type quick-change probe set, manual wiring errors are eliminated, through double verification of laser scanning and infrared positioning, the detection accuracy is improved, and the detection precision is improved. And the reliable test in a complex environment is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile compressor testing, and in particular to an EOL performance testing device for an electric compressor of a new energy automobile. Background Art

[0002] EOL testing (End of Line Test) refers to a systematic test conducted at the end of a product's life cycle or the final stage of a production line, which aims to comprehensively evaluate the performance, reliability and safety of the product at the final stage. In the automotive industry, EOL testing is mainly used in the final stage of the automobile manufacturing process to ensure the quality and performance of the vehicle. The EOL test system integrates a variety of test functions, including battery charge and discharge testing, battery safety testing, battery parameter testing, and compressor performance testing. The compressor performance test includes the voltage inside the compressor, load pressure, load current, boost time and noise. The compressor is a key component of automotive air conditioning and one of the decisive factors affecting air conditioning performance. The electric compressor of new energy vehicle air conditioning is powered by the battery, and the controller controls the motor speed, thereby controlling the cooling capacity and adjusting the temperature.

[0003] Traditional testing equipment mostly relies on manual operation to fix the compressor and manually connect the wires, which has the following defects: low fixing efficiency: manual clamping device is time-consuming and manual plugging and unplugging of high-voltage interface is prone to problems such as reverse polarity and poor contact, which may cause test interruption at the least and damage the equipment at the worst; although the existing technology attempts to optimize the test process through software, it is still difficult to achieve efficient and safe full-process testing due to the separation of mechanical structure and automated control. Summary of the invention

[0004] In order to overcome the defects in the prior art, the purpose of the present invention is to provide an EOL performance testing device for an electric compressor of a new energy vehicle to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides an EOL performance test device for an electric compressor of a new energy vehicle, comprising a test bench for testing the voltage, load pressure, load current, boost time and noise in the electric compressor of a new energy vehicle, wherein an equipment group for fixing the compressor, a fully automatic wiring robot module and a controller are arranged at the bottom of the test bench; the equipment group comprises an equipment bench that slides horizontally into the interior of the test bench, an adaptive clamping belt that is slidably connected to the equipment bench, and an adjustment rod that is used to drive the adaptive clamping belt to slide from the outer end of the equipment bench to the middle; a pre-tightening groove is symmetrically provided on the top surface of the equipment bench in the front and rear, the middle part of the pre-tightening groove is bent outward, and the two ends of the adaptive clamping belt are slidably connected to the pre-tightening groove, so that the adaptive clamping belt slides down to the middle of the pre-tightening groove under the drive of the adjustment rod to tighten the adaptive clamping belt and compress the compressor; The fully automatic wiring robot module includes a mechanical arm equipped with a machine vision camera and a probe group arranged at the end of the mechanical arm, wherein the probe group includes a magnetic quick-change connector; The controller is equipped with a laser scanning module for acquiring the appearance data of the compressor, and drives the mechanical arm to manipulate the probe group to complete the wiring of the compressor terminal according to the positioning result of the machine vision camera.

[0006] As a further improvement of the technical solution, the adaptive clamping belt is made of plastic steel or stainless steel to form a belt-shaped structure, and linkage columns are embedded on the top surfaces of both ends of the belt, and the linkage columns are inserted and slidably connected with the pre-tightening grooves.

[0007] As a further improvement of the technical solution, an active cavity for sliding the adaptive clamp is provided inside the equipment table and between a pair of pre-tightening grooves, and a linkage rod is threadedly connected to the adjustment rod, and the linkage rod is slidably arranged inside the active cavity.

[0008] As a further improvement of the present technical solution, telescopic rods are sleeved on both ends of the linkage rod, the outer ends of the telescopic rods are upturned and rollers are rotatably arranged on both sides, linkage grooves are opened on the top surfaces of both ends of the adaptive clamping belt, the longitudinal section of the linkage groove is T-shaped and is rollingly connected to the rollers.

[0009] As a further improvement of the technical solution, a V-shaped support clip is fixedly provided in the middle of the top surface of the equipment table, and the support clip is made of spring steel and is used to support the bottom of the compressor.

[0010] As a further improvement of the present technical solution, the machine vision camera includes a high-precision infrared positioning unit for compensating for the position deviation between the robot arm and the compressor interface, and the positioning accuracy is ±0.1mm.

[0011] As a further improvement of the present technical solution, the machine vision camera is fixed at the end of the robotic arm to ensure close-range multi-angle imaging of the compressor interface; it supports 3D point cloud reconstruction and obtains the three-dimensional coordinates of the interface through a depth camera.

[0012] As a further improvement of the present technical solution, the magnetic quick-change connector of the probe group has a built-in polarity identification chip, which allows power to be supplied only when the polarity of the probe matches that of the compressor interface; the probe group is fixed to the end of the robotic arm by permanent magnet adsorption, and has built-in elastic conductive contacts.

[0013] As a further improvement of the present technical solution, the robotic arm carries a visual camera to scan the compressor surface, locates the interface position and type through an image recognition algorithm, extracts the interface center point coordinates X, Y, Z and normal direction angles θx, θy, θz, and generates three-dimensional spatial posture data.

[0014] As a further improvement of the technical solution, the robotic arm moves to 10 mm above the compressor interface and the speed drops to 10% of the rated value; the machine vision camera starts a local high-definition scan and corrects the end position in combination with the PID control algorithm until the positioning error is less than 0.1 mm; the robotic arm slowly advances along the normal direction of the compressor interface, and after the probe group contacts, the pressure sensor arranged on the equipment table triggers a positioning signal, and the controller sends a low-voltage pulse to the probe to detect whether the loop impedance is within a preset range.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The EOL performance test equipment for electric compressors of new energy vehicles can quickly fix the compressor through the coordinated tightening structure of the pre-tightening groove and the adaptive clamping belt. That is, the pre-tightening groove of the equipment table adopts a middle outward expansion design, and cooperates with the adjustment rod to drive the adaptive clamping belt to slide, and uses the change of the groove body spacing to realize the tightening of the clamping belt, so as to quickly complete the stable clamping of the compressor and avoid manual adjustment errors.

[0016] 2. The EOL performance test equipment for electric compressors of new energy vehicles can complete fully automatic and precise wiring through the linkage control of machine vision and magnetic probes. That is, the robotic arm equipped with a high-resolution industrial camera and an infrared fill light can identify the position of the compressor interface, and automatically adsorb and dock with a magnetic quick-change probe group to eliminate manual wiring errors. Through the dual verification of laser scanning and infrared positioning, reliable testing can be completed in complex environments.

[0017] 3. The EOL performance test equipment for electric compressors of new energy vehicles has expanded compatibility with multiple models through a modular probe group; the magnetic probe supports quick replacement and is suitable for different interface types; the pre-tightening groove structure can expand compatibility with mainstream compressor models, reduce the time for model change and debugging, and significantly reduce equipment investment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art, under the guidance of the present invention, select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0019] Figure 1 It is the overall assembly front view of the present invention; Figure 2 It is a schematic diagram of the overall internal assembly structure of the present invention; Figure 3 It is a schematic diagram of the equipment assembly structure of the present invention; Figure 4 A side view of the equipment assembly of the present invention; Figure 5 It is a disassembled diagram of the equipment table and the test table of the present invention; Figure 6 It is one of the schematic diagrams of the equipment platform and the adaptive entrainment assembly structure of the present invention; Figure 7 This is the second schematic diagram of the equipment platform and the adaptive entrainment assembly structure of the present invention; Figure 8 It is a schematic diagram of the assembly structure of the adaptive entrainment belt and the adjustment rod of the present invention; Fig. 9 The self-adaptive entrainment belt and adjustment rod assembly split diagram of the present invention; The meaning of each number in the figure is: 100, testing machine; 110, conveying table; 120, testing table; 121, limiting table; 200, equipment group; 210, equipment table; 211, preload groove; 212, slide groove; 213, support clamp; 214, perforation; 215, movable cavity; 220, adaptive clamping belt; 221, linkage groove; 222, linkage column; 230, adjustment rod; 240, linkage rod; 241, telescopic rod; 242, roller; 250, roller. DETAILED DESCRIPTION

[0020] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, the technical personnel's conception is based on any possible variation of the present invention, which should be regarded as belonging to the scope of the present invention. The terms "installation" and "connection" should be understood in a broad sense, which means direct connection and indirect connection through an intermediate medium.

[0021] The terms "central axis", "vertical", "horizontal", "front", "back", "up", "down", "left", "right", "top", "bottom", "inside", "outside" and the like used herein to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0022] See also Figure 1-Figure 9As shown, the present invention provides an EOL performance test device for an electric compressor of a new energy vehicle, including a test platform 100 for testing the voltage, load pressure, load current, boost time and noise in the electric compressor of a new energy vehicle, wherein a device group 200 for fixing the compressor, a fully automatic wiring robot module and a controller are arranged at the bottom of the test platform 100; the device group 200 includes a device platform 210 that slides horizontally into the interior of the test platform 100, an adaptive clamping belt 220 that is slidably connected to the device platform 210, and a device for driving the adaptive clamping belt 220 to move from the device platform 210 to the device platform 210. 0, and the outer end of the self-adaptive entrainment belt 220 slides to the middle of the adjusting rod 230; the top surface of the equipment table 210 is symmetrically provided with pre-tightening grooves 211, the middle part of the pre-tightening grooves 211 is bent outward, and the two ends of the self-adaptive entrainment belt 220 are slidably connected with the pre-tightening grooves 211, that is, the distance between the two ends of a pair of pre-tightening grooves 211 is smaller than the distance between the middle parts, thereby increasing the expansion of the two ends of the self-adaptive entrainment belt 220 and reducing the height, so that the self-adaptive entrainment belt 220 slides to the middle part of the pre-tightening groove 211 under the drive of the adjusting rod 230, tightening the self-adaptive entrainment belt 220 and pressing the compressor; so that the compressor is quickly fixed for subsequent performance testing.

[0023] Furthermore, a conveyor platform 110 is provided in front of the test machine 100 for conveying the compressor to be tested to the door of the test machine 100, and a test table 120 is provided inside the door of the test machine 100, and then an equipment table 210 is used to quickly fix the compressor and transfer it to the test table 120, and a limit table 121 is symmetrically provided on the top surface of the test table 120, and a roller 250 is symmetrically connected to the bottom surface of the equipment table 210 through a rotating shaft, so that the equipment table 210 can roll and transfer on the test table 120 and be blocked and limited by the limit table 121.

[0024] Furthermore, the adaptive clamping belt 220 is made of plastic steel or stainless steel and has a belt structure, and linkage columns 222 are embedded in the top surfaces of both ends, and the linkage columns 222 are inserted and slid with the pre-tightening groove 211; a sliding groove 212 is provided on the top surface of the equipment platform 210 and on one side of the pre-tightening groove 211 to prevent the adaptive clamping belt 220 from sliding.

[0025] Furthermore, an active cavity 215 is provided inside the equipment platform 210 and between a pair of pre-tightening grooves 211 for the adaptive clamping belt 220 to slide. A linkage rod 240 is threadedly connected to the adjusting rod 230, and the linkage rod 240 is slidably arranged inside the active cavity 215. A through hole 214 is provided in the middle of the left and right ends of the equipment platform 210, and the adjusting rod 230 is a screw rod and is plugged and rotated with the through hole 214.

[0026] Furthermore, telescopic rods 241 are sleeved at both ends of the linkage rod 240, the outer ends of the telescopic rods 241 are tilted upward and rollers 242 are rotatably arranged on both sides, and linkage grooves 221 are opened on the top surfaces of both ends of the adaptive clamping belt 220, and the longitudinal section of the linkage groove 221 is T-shaped and is rollingly connected with the rollers 242. Since the adaptive clamping belt 220 will be unfolded when moving to the middle of the equipment platform 210, the rollers 242 are used to slide in the linkage groove 221 to reduce friction, so that the adaptive clamping belt 220 is deformed smoothly; The linkage rod 240 is driven to move along its axial direction by rotating the adjusting rod 230, and the adaptive entrainment belt 220 is moved on the equipment platform 210 through the telescopic rod 241 until the adaptive entrainment belt 220 moves to the middle of the equipment platform 210 to form a state of compacting the compressor; if the outer diameter of the compressor becomes larger, it is not necessary to move the adaptive entrainment belt 220 to the middle of the equipment platform 210 to compact it.

[0027] Furthermore, a V-shaped support clamp 213 is fixedly provided in the middle of the top surface of the equipment table 210. The support clamp 213 is made of spring steel and is used to support the bottom of the compressor, thereby cooperating with the adaptive clamping belt 220 to clamp the compressor up and down to limit the position.

[0028] Specifically, the fully automatic wiring robot module includes a robotic arm equipped with a machine vision camera and a probe group arranged at the end of the robotic arm, and the probe group includes a magnetic quick-change connector; the controller is equipped with a laser scanning module to obtain the compressor appearance data, and drives the robotic arm to manipulate the probe group to complete the wiring of the compressor terminal according to the positioning results of the machine vision camera; the machine vision camera includes a high-precision infrared positioning unit to compensate for the position deviation between the robotic arm and the compressor interface, with a positioning accuracy of ±0.1mm; the machine vision camera integrates high-resolution industrial cameras, such as 20-megapixel CMOS sensors and infrared fill lights, to adapt to complex lighting environments.

[0029] Among them, the robotic arm provides high-degree-of-freedom movement capabilities, X / Y / Z-axis translation and rotation around three axes, covering the full range of positioning requirements of the compressor interface; it uses a lightweight carbon fiber arm body, the end load capacity is ≥5kg, and the repeated positioning accuracy is ≤0.05mm, which can meet the stable docking of high-voltage and high-current interfaces; the drive method adopts a combination of servo motors and harmonic reducers to ensure high-speed movement and precise stopping.

[0030] Furthermore, a machine vision camera is fixed at the end of the robotic arm to ensure close-range and multi-angle imaging of the compressor interface; it supports 3D point cloud reconstruction and obtains the three-dimensional coordinates of the interface through a depth camera.

[0031] Specifically, the probe group adopts a modular design to target different types of compressor interfaces, such as power terminals and signal plugs, and pre-sets a variety of probe groups, such as high-current gold-plated probes and miniature spring thimbles; the magnetic quick-change connector of the probe group has a built-in polarity identification chip, which allows power to be turned on only when the polarity of the probe matches that of the compressor interface; the probe group is fixed to the end of the robotic arm by permanent magnets, and has built-in elastic conductive contacts.

[0032] Furthermore, the robotic arm carries a visual camera to scan the surface of the compressor, and locates the position and type of the interface through an image recognition algorithm; extracts the coordinates X, Y, Z of the center point of the interface and the normal direction angles θx, θy, θz to generate three-dimensional spatial posture data.

[0033] During the preliminary preparation for the test, the EOL performance test equipment for the electric compressor of a new energy vehicle of the present invention converts the position of the compressor interface from the camera coordinate system to the robot arm base coordinate system during coordinate conversion, and calibrates the matrix through hand-eye calibration; during trajectory optimization, a collision-free path is generated based on the RRT rapid exploration random tree algorithm to avoid the test pipeline; when the robot arm moves to 10 mm above the compressor interface, the speed is reduced to 10% of the rated value; the machine vision camera starts a local high-definition scan, and the terminal position is corrected in combination with the PID control algorithm until the positioning error is less than 0.1 mm; the robot arm slowly advances along the normal direction of the compressor interface, and after the probe group contacts, the pressure sensor arranged on the equipment table 210 triggers an in-position signal, and the controller sends a low-voltage pulse to the probe to detect whether the loop impedance is within a preset range. Only when the conduction test is passed, the controller releases the high-voltage power supply lock and allows the test machine 100 to start the test.

[0034] It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A new energy vehicle electric compressor EOL performance test device, comprising a test bench (100) for testing the voltage, load pressure, load current, boost time and noise in the new energy vehicle electric compressor, characterized in that: An equipment group (200) for fixing the compressor, a fully automatic wiring robot module and a controller are arranged in the bottom of the test machine (100); the equipment group (200) comprises an equipment table (210) that slides horizontally into the interior of the test machine (100), an adaptive clamping belt (220) that is slidably connected to the equipment table (210), and an adjustment rod (230) that is used to drive the adaptive clamping belt (220) to slide from the outer end of the equipment table (210) to the middle part; a pre-tightening groove (211) is symmetrically provided on the top surface of the equipment table (210) in the front and rear directions, the middle part of the pre-tightening groove (211) is bent outward, and both ends of the adaptive clamping belt (220) are slidably connected to the pre-tightening groove (211), so that the adaptive clamping belt (220) slides down to the middle part of the pre-tightening groove (211) under the drive of the adjustment rod (230) to tighten the adaptive clamping belt (220) and compress the compressor; The fully automatic wiring robot module includes a mechanical arm equipped with a machine vision camera and a probe group arranged at the end of the mechanical arm, wherein the probe group includes a magnetic quick-change connector; The controller is equipped with a laser scanning module for acquiring the appearance data of the compressor, and drives the mechanical arm to manipulate the probe group to complete the wiring of the compressor terminal according to the positioning result of the machine vision camera.

2. The EOL performance test equipment for electric compressors for new energy vehicles according to claim 1 is characterized in that: The adaptive clamping belt (220) is made of plastic steel or stainless steel to form a belt-shaped structure, and linkage columns (222) are embedded on the top surfaces of both ends of the belt. The linkage columns (222) are plugged and slidably connected with the pre-tightening grooves (211).

3. The EOL performance test equipment for electric compressors for new energy vehicles according to claim 2 is characterized in that: An active cavity (215) for sliding the adaptive clamping belt (220) is provided inside the equipment platform (210) and between a pair of pre-tightening grooves (211). A linkage rod (240) is threadedly connected to the adjustment rod (230). The linkage rod (240) is slidably disposed inside the active cavity (215).

4. The EOL performance test equipment for the electric compressor of new energy vehicles according to claim 3 is characterized in that: Telescopic rods (241) are sleeved at both ends of the linkage rod (240); the outer ends of the telescopic rod (241) are tilted upward and rollers (242) are rotatably arranged on both sides; linkage grooves (221) are provided on the top surfaces of both ends of the adaptive clamping belt (220); the longitudinal section of the linkage groove (221) is T-shaped and is rollingly connected to the rollers (242).

5. The EOL performance test equipment for electric compressors for new energy vehicles according to claim 4 is characterized in that: A V-shaped support clip (213) is fixedly arranged in the middle of the top surface of the equipment platform (210); the support clip (213) is made of spring steel and is used to support the bottom of the compressor.

6. The EOL performance test equipment for electric compressors of new energy vehicles according to claim 5 is characterized in that: The machine vision camera includes a high-precision infrared positioning unit for compensating for the position deviation between the robot arm and the compressor interface, with a positioning accuracy of ±0.1mm.

7. The EOL performance test equipment for electric compressors of new energy vehicles according to claim 6 is characterized in that: The machine vision camera is fixed at the end of the robotic arm to ensure close-range multi-angle imaging of the compressor interface; it supports 3D point cloud reconstruction and obtains the three-dimensional coordinates of the interface through a depth camera.

8. The EOL performance test equipment for electric compressors for new energy vehicles according to claim 7 is characterized in that: The magnetic quick-change connector of the probe group has a built-in polarity identification chip, which allows power to be turned on only when the polarity of the probe matches that of the compressor interface; the probe group is fixed to the end of the robotic arm by permanent magnet adsorption, and has built-in elastic conductive contacts.

9. The EOL performance test equipment for electric compressors of new energy vehicles according to claim 8 is characterized in that: The robotic arm carries a visual camera to scan the compressor surface, locates the interface position and type through an image recognition algorithm, extracts the interface center point coordinates X, Y, Z and normal direction angles θx, θy, θz, and generates three-dimensional spatial posture data.

10. The EOL performance test equipment for electric compressors of new energy vehicles according to claim 9 is characterized in that: The robotic arm moves to a position 10 mm above the compressor interface, and the speed is reduced to 10% of the rated value; the machine vision camera starts a local high-definition scan, and the end position is corrected in combination with the PID control algorithm until the positioning error is less than 0.1 mm; the robotic arm slowly advances along the normal direction of the compressor interface, and after the probe group contacts, a pressure sensor arranged on the equipment table (210) triggers a signal in place, and the controller sends a low-voltage pulse to the probe to detect whether the loop impedance is within a preset range.

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