CN114689338B - A test system for the alignment and guidance function of an electric vehicle wireless charging system - Google Patents
A test system for the alignment and guidance function of an electric vehicle wireless charging system Download PDFInfo
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- CN114689338B CN114689338B CN202210176681.1A CN202210176681A CN114689338B CN 114689338 B CN114689338 B CN 114689338B CN 202210176681 A CN202210176681 A CN 202210176681A CN 114689338 B CN114689338 B CN 114689338B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
本发明公开了一种无线电传输技术领域的电动汽车无线充电系统对位引导功能测试系统，旨在解决不同厂家电动汽车充电系统副边设备的测试安装问题和位置感知精度测试问题。测试系统包括控制处理器、装载壳体、样品装夹模块和定位导航模块，其中，所述样品装夹模块包括夹持组件、对中夹紧驱动机构和升降驱动机构，所述定位导航模块包括定位装置和测距装置，可以识别得到检测范围内指定参考点与原边设备、副边设备之间的位置关系，进而可由控制处理器计算出副边设备与原边设备之间的位置关系。本发明可精确对电动汽车无线充电系统的对位引导功能的位置感知精度及纠偏引导进行测试，操作简单高效。
The present invention discloses a test system for the alignment guidance function of an electric vehicle wireless charging system in the field of radio transmission technology, which is intended to solve the test and installation problems of the secondary side equipment of the electric vehicle charging system of different manufacturers and the position perception accuracy test problems. The test system includes a control processor, a loading shell, a sample clamping module and a positioning and navigation module, wherein the sample clamping module includes a clamping assembly, a centering clamping drive mechanism and a lifting drive mechanism, and the positioning and navigation module includes a positioning device and a distance measuring device, which can identify the position relationship between a specified reference point and the primary side equipment and the secondary side equipment within the detection range, and then the control processor can calculate the position relationship between the secondary side equipment and the primary side equipment. The present invention can accurately test the position perception accuracy and deviation correction guidance of the alignment guidance function of the electric vehicle wireless charging system, and the operation is simple and efficient.
Description
Technical Field
The invention relates to an electric automobile wireless charging system alignment guide function test system, and belongs to the technical field of wireless electric energy transmission.
Background
According to the current international and domestic standard regulations, the maximum allowable offset of the center point of primary side equipment (a device for converting electric energy into an alternating electromagnetic field and directionally transmitting) and secondary side equipment (a device for receiving the alternating electromagnetic field and converting the alternating electromagnetic field into electric energy) of an electric automobile line charging system is (X direction +/-75 mm and Y direction +/-100 mm). Once the vehicle and the electric energy transmitting end are misaligned, not only the transmission power and the efficiency are difficult to ensure, but also the magnetic field leakage level of the surrounding area of the vehicle is increased sharply, and serious adverse effects are caused to the health of drivers and pedestrians. Therefore, the primary side equipment and the secondary side equipment can be aligned, and the hard requirement of the wireless charging industrialization of the electric automobile can be met.
The alignment guide function is one of key auxiliary functions of the wireless charging system of the electric automobile, and is used for transmitting coordinate information of primary side equipment relative to secondary side equipment to a vehicle-mounted central processing unit through a certain position sensing technology when the wireless charging vehicle-mounted secondary side equipment of the electric automobile is at a certain distance from the ground side primary side equipment, and planning an optimal parking path through a certain correction guide technology and feeding back the optimal parking path to a driver. The alignment guide function generally needs to be activated when the primary and secondary devices are 5 meters apart.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a test system for the alignment guide function of an electric automobile wireless charging system, which is used for realizing the test of the position sensing precision and the deviation correction guide of the alignment guide function of the wireless charging system, and can be suitable for wireless charging equipment (namely secondary equipment) with different sizes and different ground clearance, so that the test and installation problems and the precision sensing problems of samples of different manufacturers are solved.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
the utility model provides an electric automobile wireless charging system counterpoint guide function test system, includes loading casing, sample clamping module, location navigation module and control processor;
The sample clamping module comprises a clamping assembly, a centering clamping driving mechanism and a lifting driving mechanism, wherein the clamping assembly is movably arranged in a loading shell and used for clamping secondary side equipment, the centering clamping driving mechanism is used for driving the clamping assembly to move in the x-axis direction and the y-axis direction so as to clamp the secondary side equipment and enable the secondary side equipment to be in a preset position in the x-axis direction and the y-axis direction, and the lifting driving mechanism is used for driving the clamping assembly to move in the z-axis direction so that a ground clearance of the clamped secondary side equipment is a designated height of a sample;
the positioning navigation module comprises a positioning device and a distance measuring device, wherein the positioning device is arranged on a loading shell and used for identifying position information of a designated reference point in a detection range and transmitting the position information to a control processor, the distance measuring device is arranged on a sample clamping module and used for identifying the position information of the mounting position point of the distance measuring device and transmitting the position information to the control processor, and the control processor calculates the position relation between secondary side equipment and primary side equipment according to the position relation between the designated reference point and primary side equipment, the position relation between the distance measuring device and secondary side equipment and the received information.
Preferably, a mounting frame is fixedly arranged in the loading shell, a bearing frame is movably arranged on the mounting frame, a centering clamping driving mechanism is arranged on the bearing frame, and a lifting driving mechanism is arranged on the mounting frame and is in driving connection with the bearing frame;
The clamping assembly comprises a left clamping part, a right clamping part and a front clamping part which are perpendicular to each other, wherein the left clamping part, the right clamping part, the front clamping part and the rear clamping part respectively comprise two clamping arms which are arranged oppositely, and the clamping arms of the left clamping part, the right clamping part and/or the front clamping part and the rear clamping part are provided with a bottom plate for supporting secondary side equipment, so that the device can be suitable for the secondary side equipment with various sizes;
The centering clamping mechanism comprises an x-direction driving mechanism and a y-direction driving mechanism, and the two driving mechanisms respectively drive clamping arms connected with the left clamping part, the right clamping part, the front clamping part and the rear clamping part, so that a sample can be clamped conveniently.
Preferably, the mounting frame is longitudinally provided with a plurality of guide sliding rails, and the bearing frame is slidably arranged on the guide sliding rails, so that the bearing frame can be lifted up and down in the mounting frame;
The upper end and the lower end of the guide sliding rail are respectively provided with a position sensor, and the signal output end of the position sensor is connected with the controller.
Preferably, the lifting driving mechanism comprises a lifting driving motor, a driving sprocket, a steering sprocket and a driving chain, wherein the middle parts of two sides of the bearing frame are respectively provided with a driving connecting part, the steering sprocket is arranged on a mounting bracket above the driving connecting part, an output shaft of the lifting driving motor is in driving connection with the driving sprocket, one end of the driving chain is movably connected with the mounting frame, and the other end of the driving chain is fixedly connected with the driving connecting part of the bearing frame after bypassing the driving sprocket and the steering sprocket. The lifting driving mechanism is adopted to conveniently simulate the effect that secondary side equipment with different sizes is installed on automobile chassis with different heights.
Preferably, the mounting frame is provided with a tensioning gas spring, one end of the transmission chain connected with the mounting frame is connected with the movable end of the tensioning gas spring, and the extending direction of the movable end of the tensioning gas spring is away from the mounting position of the transmission chain wheel. The tensioning gas spring can be used for providing a balancing force when the bearing frame is lifted up and down.
Preferably, the transmission chain wheels are arranged at the end parts of the installation frame at the same height as the steering chain wheels, the lifting driving motor is installed between the steering chain wheels at two sides, the two sides of the lifting driving motor are respectively provided with an output shaft, and the output shafts are respectively connected with the transmission chain wheels at the corresponding sides in a transmission way.
Preferably, the x-direction driving mechanism comprises an x-direction driving motor, a driving wheel, a driven wheel, a driving wheel and screw rods B, wherein the number of the screw rods B is two, the screw rods B are oppositely arranged in parallel and are respectively rotatably arranged at the front end and the rear end of the bearing frame, the end parts of clamping arms of the left clamping part and the right clamping part are respectively in threaded connection with the screw rods B, and the driving wheel is respectively arranged at the two ends of each screw rod B;
The X-direction driving motor, the driving wheel and the driven wheel are arranged on the transmission connecting part, an output shaft of the X-direction driving motor is in transmission connection with the driving wheel, two sides of the upper part of the driving wheel are respectively meshed with the driven wheel, and the driven wheel is in transmission connection with the driving wheel through a synchronous belt. The x-direction driving mechanism can realize the left-right movement of the clamped sample.
Preferably, the lower part of the loading shell is provided with a travelling mechanism, the travelling mechanism comprises 4 Mecanum wheels which are respectively and independently controlled by a driving motor, the Mecanum wheels are arranged at four end corners of the bottom of the loading shell through independent suspension mechanisms, and the controller controls the driving motor to operate so as to drive the Mecanum wheels to act, so that the loading shell moves according to a straight line or an arc line with a specified curvature radius. The travelling mechanism can realize the moving requirements of the loading shell such as forward movement, transverse movement, oblique movement, rotation, combination thereof and the like, thereby simulating the parking track of any specification of vehicle and meeting the testing requirement of deviation rectifying and guiding in the alignment guiding function of the wireless charging system.
Preferably, the left clamping part, the right clamping part, the front clamping part and the rear clamping part are made of nonmetal materials, the positioning device adopts a laser SLAM positioning navigation module, and the distance measuring device adopts a radar distance measuring device.
The safety protection module comprises an anti-collision strip and an emergency stop switch, the anti-collision strip and the emergency stop switch are respectively arranged at the front, the rear, the left and the right of the loading shell, the signal output end of the emergency stop switch is connected with a control processor, the emergency stop switch is controlled by the control processor, and when the positioning device detects that an obstacle exists in front, all motors of the loading shell can be immediately stopped, so that the loading shell is timely protected.
The control processor is also used for executing a preset obstacle avoidance algorithm according to the obstacle information acquired by the positioning device, and controlling the movement or stop of the loading shell according to the result of the obstacle avoidance algorithm. The safety protection module can effectively prevent the loading shell from being damaged due to collision with the obstacle in the moving process.
Preferably, the control processor is further configured to:
Receiving externally input length and width data of secondary side equipment to be detected, and controlling the operation of an x-direction driving mechanism and a y-direction driving mechanism in the centering and clamping mechanism according to the received data so as to drive the left clamping part, the right clamping part, the front clamping part and the rear clamping part to act;
And receiving external sample designated height data, and controlling the operation of the lifting driving mechanism according to the sample designated height data so as to drive the bearing frame to move up and down.
On the other hand, the invention also provides a test method of the alignment guide function test system of the wireless charging system of the electric automobile, which comprises the following steps:
S1, fixing the position of primary side equipment in a test environment, determining the horizontal position coordinates and the height h of a central point A of the upper surface of the primary side equipment, and inputting the horizontal position coordinates and the height h into a control processor;
S2, determining a reference point B which is consistent with the height of the positioning device in a test environment, measuring the relative position coordinate (x 1,y1) of the point B relative to the point A, and inputting the relative position coordinate into a control processor;
S3, controlling the centering clamping mechanism to clamp the secondary side equipment sample through the control processor so that the center point of the lower surface of the sample is positioned on a designated coordinate point P of a plane where the secondary side equipment sample is positioned;
S4, setting a plurality of test points, measuring the coordinates (x 2,y2) of the point B relative to the positioning device by using the positioning device on each test point, and obtaining the coordinates (x, y) of the center point of the lower surface of the secondary side equipment sample relative to the center point of the upper surface of the primary side equipment in the horizontal direction by the control processor through coordinate conversion according to the coordinates (x 1,y1）、（x2,y2) of the point P relative to the positioning device in the horizontal direction and the coordinates (x 3,y3) of the predetermined point P relative to the positioning device;
S5, on each test point, the control processor calculates a coordinate z of the center point of the lower surface of the secondary side equipment sample relative to the center point of the upper surface of the primary side equipment in the z-axis direction according to the height h 1 of the secondary side equipment sample and the height h of the center point of the upper surface of the primary side equipment;
s6, for each test point, the control processor acquires the relative coordinates (x 0,y0,z0) of the secondary side equipment sample identified by the radio charging system of the tested electric automobile, compares the relative coordinates with the acquired relative coordinates (x, y, z), and acquires a coordinate difference value between the two relative coordinates;
And S7, the control processor calculates the position sensing precision of the wireless charging system of the tested electric automobile based on the coordinate difference values obtained from all the test points.
Preferably, step S3 includes:
the control processor receives externally input length and width data of a secondary side equipment sample to be detected;
The control processor controls the centering clamping mechanism to drive the left clamping part, the right clamping part, the front clamping part and the rear clamping part to act until the distance between the clamping arms is slightly larger than the width and the length of the sample according to the received data;
After a secondary side equipment sample to be tested is placed in the clamping assembly, the control processor receives a clamping control instruction, controls the centering clamping mechanism to clamp the sample, and enables the center point of the lower surface of the sample to coincide with the center point of the horizontal direction in the loading shell on the plane;
The control processor controls the lifting driving mechanism to drive the bearing frame to drive the secondary side equipment sample to lift to the position that the center point of the lower surface of the sample is located at the designated height h1 of the sample.
Preferably, in step S3, the control processor controls the lifting driving mechanism to drive the carrier, and drives the secondary side device sample to lift to a position where the center point of the lower surface of the sample is located at a specified height h 1 of the sample, including:
the control processor acquires the height data of the radar ranging device transmitted by the radar ranging device, calculates the control quantity of the lifting driving mechanism according to the predetermined height relation between the radar ranging device and the position of the lower surface of the corresponding sample in the bearing frame and the designated height of the sample, and controls the operation of the lifting driving mechanism according to the calculated control quantity.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention designs a sample clamping module, the height of a sample is adjusted through the lifting driving mechanism, and the centering clamping driving mechanism drives the sample to move in the x-axis direction and the y-axis direction and finally reach a preset position, so that the effect that secondary side equipment with different sizes is installed on automobile chassis with different heights is simulated, and the problem of sample installation in the process of testing samples of different manufacturers is solved;
2. The invention designs a positioning navigation module, and the position relation between a designated reference point and primary side equipment and the position relation between the reference point and secondary side equipment can be measured through a positioning device and a distance measuring device, so that the position relation of the secondary side equipment relative to the primary side equipment is converted through a control processor, and the problem of testing the position sensing precision of a sample is solved;
3. The invention also designs a motion control module and a safety protection module, which are convenient for the whole bearing shell to move according to the circular arc with any curvature radius and move linearly, and simultaneously ensure that the test system is not damaged when an obstacle appears in front in the running process.
The invention can accurately test the position sensing precision and correction guidance of the alignment guidance function of the wireless charging system of the electric automobile, and has simple and efficient operation and convenient use.
Drawings
Fig. 1 is a schematic diagram of an overall structure of a wireless charging system alignment guide function test system according to an embodiment of the present invention;
FIG. 2 is a right side view of the structure of FIG. 1;
fig. 3 is a schematic structural diagram of a sample clamping module of a wireless charging system alignment guide function test system according to an embodiment of the present invention;
FIG. 4 is a schematic top view of FIG. 3;
FIG. 5 is a schematic diagram of a left-hand configuration of the configuration shown in FIG. 3;
FIG. 6 is an enlarged partial schematic view of the drive connection of FIG. 3;
FIG. 7 is a schematic diagram of a front view of the structure shown in FIG. 3;
In the figure, a loading shell, an 11-microphone wheel, a 12-independent suspension structure, a 21 positioning device, a 22 distance measuring device, a 3-sample clamping module, a 31 mounting frame, a 32-guide sliding rail, a 33-lifting driving mechanism, a 3301-lifting driving motor, a 3302-driving chain wheel, a 3303-steering chain wheel, a 3304-driving chain, a 3305-driving connecting part, a 3306-tensioning gas spring, a 34 y-direction driving mechanism, clamping arms of front and rear clamping parts of 3401, a 3402-front and rear clamping driving motor, a 3403 first synchronous belt, 3404 second synchronous belt, 3405 lead screw A, a 35 x-direction driving mechanism, a 3501 driving wheel, a 3502 driven wheel, a 3503 third synchronous belt, a 3504 driving wheel, clamping arms of left and right clamping parts of 3505, a 3506 lead screw B, a 3507 guide rod, a 51 scram switch and a 52 anti-collision bar are shown.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It is also to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Example 1:
The embodiment introduces a system for testing the alignment guide function of a wireless charging system of an electric automobile, which is shown in fig. 1, and comprises a loading shell 1, a sample clamping module 3 and a positioning navigation module. The loading shell 1 is internally fixedly provided with a mounting frame 31, the mounting frame 31 is longitudinally provided with a plurality of guide slide rails 32, and the guide slide rails 32 are movably provided with a bearing frame. The upper end and the lower end of the guide slide rail 32 are respectively provided with a position sensor, the signal output end of the position sensor is connected with the controller, and the position sensor can monitor the height position of the bearing frame on the guide slide rail 32 in real time.
Referring to fig. 3, the sample clamping module 3 includes a clamping assembly, a centering clamping driving mechanism and a lifting driving mechanism 33, where the clamping assembly is movably installed in the loading housing 1 and is used to clamp the secondary side device, the clamping assembly includes a left clamping part, a right clamping part, a front clamping part and a rear clamping part that are perpendicular to each other, the left clamping part, the right clamping part, the front clamping part and the rear clamping part respectively include two clamping arms that are arranged oppositely, at least one of the clamping arms of the left clamping part, the right clamping part, the front clamping part and the rear clamping part has a bottom plate for supporting the secondary side device, and an L-shaped bearing module can be selected for use.
The centering and clamping driving mechanism is mounted on the carrier and comprises an x-direction driving mechanism 35 and a y-direction driving mechanism 34 which are respectively used for driving the clamping arms of the left clamping part, the right clamping part, the front clamping part and the rear clamping part, so as to control the clamping assembly to move in the x-axis direction and the y-axis direction to clamp the secondary side equipment and enable the secondary side equipment to be in a preset position in the x-axis direction and the y-axis direction.
The lifting driving mechanism 33 is installed on the installation frame 31 and is used for driving the clamping assembly to move in the z-axis direction, so that the ground clearance of the clamped secondary side equipment is the designated height of the sample, the functions of simulating the heights of different automobile chassis and being compatible with wireless charging system samples with different working clearances are realized.
As shown in fig. 1 and fig. 7, the positioning navigation module includes a positioning device 21 and a ranging device 22, where the positioning device 21 may be a laser SLAM positioning navigation module, and the ranging device 22 may be a radar ranging device. The positioning device 21 is arranged on the loading shell 1, is used for identifying position information of a designated reference point in a detection range and transmitting the position information to the control processor, the distance measuring device 22 is arranged on the bearing frame, and is used for identifying the height information of the mounting position point of the distance measuring device 22 and transmitting the height information to the control processor;
The control processor calculates the positional relationship between the secondary side device and the primary side device based on the positional relationship between the specified reference point and the primary side device, the positional relationship between the ranging device 22 and the secondary side device, and the received information. The control processor is further configured to receive externally input length and width data of the secondary side device to be tested, control the operation of the x-direction driving mechanism 35 and the y-direction driving mechanism 34 in the centering and clamping mechanism according to the received data so as to drive the left clamping part, the right clamping part, the front clamping part, the rear clamping part and the front clamping part to act, receive external sample designated height data, and control the operation of the lifting driving mechanism 33 according to the sample designated height data so as to drive the bearing frame to act up and down.
Example 2:
On the basis of example 1, this example also had the following design.
Referring to fig. 5 to 6, the elevation driving mechanism 33 includes an elevation driving motor 3301, a driving sprocket 3302, a steering sprocket 3303 and a driving chain 3304, the steering sprocket 3303 is mounted on a mounting bracket above the driving connection portion 3305, the driving sprocket 3302 is disposed at an end of the mounting frame 31 having the same height as the steering sprocket 3303, and the elevation driving motor 3301 is mounted between the steering sprockets 3303 at both sides. The lifting driving motor 3301 is a double-headed motor, two sides of which are respectively provided with output shafts, and the output shafts are respectively connected with the corresponding side transmission chain wheels 3302 in a transmission way. The middle parts of two sides of the bearing frame are respectively provided with a transmission connecting part 3305, an output shaft of the lifting driving motor 3301 is connected with a transmission chain wheel 3302 in a transmission way, one end of a transmission chain 3304 is movably connected with the mounting frame 31, and the other end of the transmission chain 3304 bypasses the transmission chain wheel 3302 and the steering chain wheel 3303 and then is fixedly connected with the transmission connecting part 3305 of the bearing frame.
When the bearing frame is required to be driven to lift, the lifting driving motor 3301 can be started by the control processor, and the lifting driving motor 3301 drives the transmission chain wheel 3302 to rotate through output shafts on two sides, so that the transmission chain 3304 is driven to sequentially transmit on the transmission chain wheel 3302 and the steering chain wheel 3304, and the bearing frame fixed on the transmission connecting part 3305 is driven to lift. The installation frame 31 is provided with a tensioning gas spring 3306, one end of the transmission chain 3304 connected with the installation frame 31 is connected with the movable end of the tensioning gas spring 3306, and the extending direction of the movable end of the tensioning gas spring 3306 deviates from the installation position of the transmission chain wheel 3302. The tensioning gas spring 3306 may provide a counter-balance force during the up and down lifting of the carrier.
As shown in fig. 3-4, the x-direction driving mechanism comprises an x-direction driving motor, a driving wheel 3501, a driven wheel 3502, a driving wheel 3504 and a screw rod B3506, wherein the number of the screw rods B3506 is two, the screw rods B3506 are oppositely arranged in parallel and are respectively rotatably arranged at the front end and the rear end of the bearing frame, the end parts of clamping arms 3505 of the left clamping part and the right clamping part are respectively in threaded connection with the screw rods B3506, and the driving wheels 3504 are respectively arranged at the two ends of each screw rod B3506. The x-direction driving motor, the driving wheel 3501 and the driven wheel 3502 are arranged on the transmission connecting part 3305, the output shaft of the x-direction driving motor is connected with the driving wheel 3501 in a transmission way, two sides of the upper part of the driving wheel 3501 are respectively meshed with the driven wheel 3502, and the driven wheel 3502 is connected with the driving wheel 3504 in a transmission way through a third synchronous belt 3503. The guide bars 3507 are arranged on the inner side of the screw rod B3506, the guide bars 3507 are arranged in the clamping arms 3505 of the left clamping part and the right clamping part in a penetrating mode, the clamping arms 3505 are guaranteed to move in the horizontal direction, and the movement angle of the clamping arms 3505 is prevented from rotating.
When the centering and clamping operation in the x direction is required, the x-direction driving motor is started by the control processor, the output shaft of the x-direction driving motor drives the driving wheel 3501 to rotate, then the driven wheel 3502 meshed with the two sides of the upper part is driven to rotate, the driven wheel 3502 drives the driving wheels 3504 positioned on the two sides through the third synchronous belt 3503, so that the screw rod B is driven to rotate, and the clamping arms 3505 of the left clamping part and the right clamping part are controlled to simultaneously move inwards or outwards in the x direction.
Referring to fig. 4, the y-direction driving mechanism includes a clamping arm 3401 of a front clamping part and a rear clamping driving motor 3402, a first synchronous belt 3403, a second synchronous belt 3404 and a screw rod a3405, an output shaft of the front and rear clamping driving motor 3402 is connected with a first belt pulley in a transmission manner, the first belt pulley is connected with the first synchronous belt 3403 in a transmission manner before a transmission rod, two sides of the transmission rod are respectively provided with a second belt pulley, the second belt pulley is connected with the screw rod a3405 on two sides in a transmission manner through the second synchronous belt 3404, and the screw rod a3405 is respectively screwed with the clamping arm 3401 of the front and rear clamping part.
When the y-direction centering clamping operation is required, the front and rear clamping driving motor 3402 is started by the control processor, the front and rear clamping driving motor 3402 drives the belt wheel I to rotate, the belt wheel I drives the transmission rod to rotate through the first synchronous belt 3403, the belt wheel II on two sides of the transmission rod is driven to rotate, the belt wheel II drives the screw rod A3405 to rotate through the second synchronous belt 3404, and finally the clamping arms 3401 of the front and rear clamping parts are driven to move.
The clamping arms of the left clamping part, the right clamping part, the front clamping part and the rear clamping part are made of nonmetal materials, so that vortex heating is prevented from being caused when the wireless charging system is positioned, and the electric energy transmission and the positioning accuracy of the wireless charging system are not affected.
Example 3:
The present embodiment is also designed as follows on the basis of embodiment 1 or on the basis of a combination of embodiment 1 and embodiment 2.
Referring to fig. 2, a traveling mechanism is further installed at the lower part of the loading housing 1, the traveling mechanism comprises 4 mecanum wheels 11 which are independently controlled by driving motors, and the mecanum wheels 11 are installed at four end corners of the bottom of the loading housing 1 through independent suspension mechanisms 12.
The controller controls the driving motor to operate to drive the Mecanum wheel 11 to act so that the loading housing 1 moves in a straight line or a circular arc line of a specified radius of curvature. The four Mecanum wheels 11 can be combined into moment in any direction by means of the cooperation of the rotation direction and the speed among the wheels, so that the loading shell 1 can freely move along the direction of resultant force vectors without changing the direction of the loading shell, the all-round driving technology is provided, the moving requirements of the loading shell 1 such as forward movement, transverse movement, oblique movement, rotation and combination of the loading shell 1 can be realized, the parking track of any specification vehicle can be simulated, and the testing requirement of deviation rectifying and guiding in the alignment guiding function of a wireless charging system is met.
Referring to fig. 1, the alignment guide function test system of the wireless charging system for the electric automobile of the embodiment further comprises a safety protection module, the safety protection module comprises an anti-collision strip 51 and an emergency stop switch 52, the anti-collision strip 51 and the emergency stop switch 52 are respectively arranged at four positions of the front, the rear, the left and the right of the loading shell 1, soft rubber is coated outside the anti-collision strip 51, the side edge of the whole loading shell 1 is protruded, and when the loading shell 1 encounters an obstacle during running, the protruded anti-collision strip 51 can ensure that the test system is not damaged.
In addition, the signal output terminal of the scram switch 52 is connected to the control processor. The control processor is used for executing a preset obstacle avoidance algorithm according to the obstacle information acquired by the positioning device, and controlling the loading shell to move or stop according to the result of the obstacle avoidance algorithm. Pressing any one of the 4 emergency stop switches 52 can stop all motors in the loading shell 1, so that a tester can quickly stop all motors in the loading shell 1 no matter in which direction the loading shell 1 is positioned, and safety is ensured. When the positioning device 21 detects that an obstacle exists in front, all motors of the loading housing 1 are stopped immediately, and the loading housing 1 is protected in time.
Example 4:
the embodiment introduces a test method of an electric vehicle wireless charging system alignment guide function test system, and the electric vehicle wireless charging system alignment guide function test system of the embodiment is adopted. The method comprises the following steps:
S1, fixing the position of primary side equipment in a test environment, determining the horizontal position coordinates and the height h of a central point A of the upper surface of the primary side equipment, and inputting the horizontal position coordinates and the height h into a control processor;
S2, determining a reference point B which is consistent with the height of the positioning device in a test environment, measuring the relative position coordinate (x 1,y1) of the point B relative to the point A, and inputting the relative position coordinate into a control processor;
s3, the control processor receives externally input length and width data of a secondary side equipment sample to be detected;
The control processor controls the centering clamping mechanism to drive the left clamping part, the right clamping part, the front clamping part and the rear clamping part to act until the distance between the clamping arms is slightly larger than the width and the length of the sample according to the received data;
after the secondary side equipment sample to be tested is placed in the clamping assembly, the control processor receives a clamping control instruction, controls the centering clamping mechanism to clamp the sample, and enables the center point of the lower surface of the sample to coincide with the center point of the horizontal direction in the loading shell 1 on the plane;
the centering clamping mechanism is controlled by the control processor to clamp the secondary side equipment sample, so that the center point of the lower surface of the sample is positioned on a designated coordinate point P of the plane;
The control processor acquires the height data of the radar ranging device transmitted by the radar ranging device, calculates the control quantity of the lifting driving mechanism 33 according to the predetermined height relation between the radar ranging device and the position of the lower surface of the corresponding sample in the bearing frame and the designated height of the sample, and controls the operation of the lifting driving mechanism according to the calculated control quantity. Controlling the lifting driving mechanism 33 to drive the bearing frame to drive the secondary side equipment sample to lift to the position that the center point of the lower surface of the sample is positioned at the designated height h 1 of the sample;
S4, setting a plurality of test points, measuring the coordinates (x 2,y2) of the point B relative to the positioning device by using the positioning device on each test point, and obtaining the coordinates (x, y) of the center point of the lower surface of the secondary side equipment sample relative to the center point of the upper surface of the primary side equipment in the horizontal direction by the control processor through coordinate conversion according to the coordinates (x 1,y1）、（x2,y2) of the point P relative to the positioning device in the horizontal direction and the coordinates (x 3,y3) of the predetermined point P relative to the positioning device;
S5, on each test point, the control processor calculates a coordinate z of the center point of the lower surface of the secondary side equipment sample relative to the center point of the upper surface of the primary side equipment in the z-axis direction according to the height h 1 of the secondary side equipment sample and the height h of the center point of the upper surface of the primary side equipment;
s6, for each test point, the control processor acquires the relative coordinates (x 0,y0,z0) of the secondary side equipment sample identified by the radio charging system of the tested electric automobile, compares the relative coordinates with the acquired relative coordinates (x, y, z), and acquires a coordinate difference value between the two relative coordinates;
And S7, the control processor calculates the position sensing precision of the wireless charging system of the tested electric automobile based on the coordinate difference values obtained from all the test points.
The invention can accurately test the position sensing precision and correction guidance of the alignment guidance function of the wireless charging system of the electric automobile, and has simple and efficient operation and convenient use.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are all within the protection of the present invention.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107942144A (en) * | 2017-11-10 | 2018-04-20 | 中国电力科学研究院有限公司 | Electric automobile wireless charging electromagnetic field measuring system and method |
| CN110320424A (en) * | 2019-07-06 | 2019-10-11 | 桂林电子科技大学 | A kind of electric car dynamic radio charge test device |
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| CN111186320A (en) * | 2020-03-04 | 2020-05-22 | 中兴新能源汽车有限责任公司 | Wireless charging guiding and positioning system and method and vehicle-mounted equipment |
| KR102268919B1 (en) * | 2021-01-29 | 2021-06-25 | 임상우 | Wireless charging system for electric vehicle and wireless charging method thereof |
| CN113030614B (en) * | 2021-03-01 | 2024-11-05 | 国网宁夏电力有限公司营销服务中心(国网宁夏电力有限公司计量中心) | Mobile AC/DC charging pile detection device and method |
| CN113589784B (en) * | 2021-07-19 | 2022-11-15 | 国网江苏省电力有限公司苏州供电分公司 | Position sensing and alignment guiding test system of wireless charging system of electric automobile |
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| CN107942144A (en) * | 2017-11-10 | 2018-04-20 | 中国电力科学研究院有限公司 | Electric automobile wireless charging electromagnetic field measuring system and method |
| CN110320424A (en) * | 2019-07-06 | 2019-10-11 | 桂林电子科技大学 | A kind of electric car dynamic radio charge test device |
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