A binary positioning system for wireless charging of automobiles

Abstract

A binary positioning system for wireless charging of automobiles, comprising: positioning probes, multiple groups of binary switch circuits, a stepping unit, a central control unit, and frame line identifiers; the central control unit is used to send an opening command to the positioning probes, receive high-level and / or low-level electrical signals emitted by the binary switch circuits, compare with the corresponding coordinates of pre-stored binary codes, and then control the stepping unit to move into position to align with the receiving coil and turn on wireless charging; the central control unit is default set to receive a high-level electrical signal as binary code 1 and a low-level electrical signal as binary code 0; this invention uses an MCU to receive binary codes, and a unique coordinate value corresponds to a unique binary code, which simplifies the deficiency that multiple processors are required to separately monitor different detection units for wireless positioning. One set of MCU units can make reasonable wireless positioning through different numerical values of binary codes.

Description

[0001] This application is a divisional application of the patent application with the application date of April 18, 2019, application number 201910315069.6, and invention title "A Binary Positioning System for Wireless Charging of Automobiles and Its Positioning Method". Technical Field

[0002] The present invention relates to the technical field of wireless charging for electric vehicles, in particular to a binary positioning system for wireless charging of automobiles and its positioning method, which memorizes different coordinate positions through different binary codes to achieve precise positioning of wireless charging. Background Art

[0003] From wired to wireless is an inevitable trend in the development of the consumer electronics industry, a natural demand in the mobile Internet era, and an inevitable trend in the development of the electric vehicle industry; although wireless charging technology has made great progress in various countries, the current wireless charging efficiency is relatively low and far from reaching the working efficiency of wired charging; for the electric vehicle industry, it is a major invention that changes the development prospect of the entire industry; electric vehicle wireless charging has no exposed connectors, completely avoiding safety hazards such as electric leakage and power leakage; by using wireless charging, the power supply and transformer can be hidden underground, allowing the vehicle to charge at the parking place or special charging points on the street; the wireless charging technology for electric vehicles adopts the principle of electromagnetic coupling. For power engineers, electromagnetic induction transmits electricity between the transmitting coil and the receiving coil, which is one of the most practical charging methods; when an alternating current passes through the transmitting coil, an alternating magnetic flux is generated between the transmitting coil and the receiving coil, and thus an induced electromotive force that changes with the magnetic flux is generated at the receiving coil end, and then an alternating current is output externally through the receiving coil terminals.

[0004] However, for wireless charging using electromagnetic induction technology, a relatively high requirement is imposed on the correct alignment of the positions of the transmitting and receiving coils during wireless charging. If there is a relatively large deviation, the wireless charging efficiency will be greatly reduced, and a large amount of electric energy will be wasted; moreover, when the large alignment deviation is greater than the unified understanding of the industry standard, it will also be rejected and unable to achieve the purpose of mass production.

[0005] In order to overcome the deviation problem of the positioning of the transmitting coil and the receiving coil in the prior art, technical personnel have designed various solutions:

[0006] 1. By moving the vehicle back and forth, the vehicle chassis is made to be close to being directly opposite to the transmitting coil; (This solution requires a high level of the driver and is very time-consuming and laborious, and is not suitable for non-professionals to operate)

[0007] 2. The technology of achieving alignment guidance by using high-precision GPS: For example, an electric vehicle wireless charging system with an auxiliary positioning function, with the publication number of CN206277969U, achieves the positioning requirements through an auxiliary GPS positioning system and a complex feedback unit design. However, it does not consider the cost of installing GPS under the vehicle, the complexity of communication equipment, and the deficiency that the signal shielding under the vehicle may be inaccurate. This solution has great technical difficulties in real-time.

[0008] 3. There is also the communication position signal positioning of the auxiliary coil, which requires installing more frequency modulation systems to emit multiple frequency band signals to achieve alignment. The equipment is too complex.

[0009] 4. Optical image analysis positioning has high requirements for the quality of the sampling camera, and image analysis requires a large algorithm design, so the implementation is not simple.

[0010] 5. Install a position sensor to determine the position of the receiving coil through ranging sensing, and then adjust the transmitting coil to align and correct. This method is not practical because the receiving coil itself is relatively large and there are original errors in horizontal and longitudinal ranging.

[0011] The above-mentioned alignment solutions of the existing designs are either time-consuming and laborious with low accuracy, or require large investments, have complex operation and control, are not easy to maintain, and are not easy to promote. In view of this, the inventor has realized a brand-new vehicle wireless positioning system and method with high accuracy, low investment, safe and reliable operation through the uniqueness of computer binary coding, combined with a simple structure design and hardware circuit design. Summary of the Invention

[0012] In order to solve the above technical problems, the present invention provides a binary positioning system for vehicle wireless charging and its positioning method. Through the circuit design of the hardware structure, by using the correspondence between binary coding and coordinates, each group of binary coding only corresponds to a fixed coordinate memory, and combined with the trigger structure of binary coding, the complex design and investment of the existing electric vehicle charging positioning system are ingeniously solved. This system has low investment, is easy to promote, is convenient to maintain, and is suitable for rapid mass production.

[0013] A binary positioning system for vehicle wireless charging and its positioning method, wherein:

[0014] A binary positioning system for vehicle wireless charging includes: positioning probes, multiple groups of binary switch circuits, a stepping unit, a central control unit, and frame line markings.

[0015] Further, referring to Figure 1As shown, the positioning probe is installed above the center point of the receiving coil on the chassis of the electric vehicle. The transmitting coil is installed on the stepping unit and is used for wireless charging of the receiving coil. The stepping unit is used to control the alignment of the transmitting coil with the receiving coil to ensure high-efficiency wireless charging. The multiple groups of binary switch circuits are installed side by side on the ground inside the frame line identifier. The central control unit is used to send an enabling command to the positioning probe, receive the high-level and / or low-level electrical signals sent by the binary switch circuits, and control the movement of the stepping unit to align with the receiving coil and start wireless charging by comparing with the corresponding coordinates of the pre-stored binary codes. The central control unit is default set such that a high-level electrical signal received is binary code 1 and a low-level electrical signal received is binary code 0.

[0016] As an example, when the receiving coil is located at the front of the vehicle, the multiple groups of binary switch circuits are installed side by side on the ground at the upper part of the center inside the frame line identifier.

[0017] Further, referring to Figure 2 As shown, the binary switch circuit includes: a driving structure, a changeover switch, a pull-up resistor R1, and a pull-down resistor R1'. The fixed potential terminal of the changeover switch is electrically connected to the I / O terminal of the central control unit. One position of the changeover switch is electrically connected to one end of the pull-up resistor R1. The other end of the pull-up resistor R1 is connected to a high level. The second position of the changeover switch is electrically connected to one end of the pull-down resistor R1'. The other end of the pull-down resistor R1' is grounded. The driving structure is used to drive the changeover switch to shift gears.

[0018] Further, the ends of each group of binary switch circuits connected to the high level are all in parallel, the ends of each group of binary switch circuits connected to the low level are all in parallel, and the fixed potential terminals of each group of binary switch circuits electrically connected to the I / O terminal of the central control unit are all in parallel.

[0019] Further, referring to Figure 3 As shown, the driving structure includes: a support frame with a square shape on all sides, a metal movable cover plate with a cross-sectional shape and size consistent with that of the support frame. The metal movable cover plate is fixed to the upper part of one side of the support frame through a spring structure. A limiting structure is provided above the other side of the support frame adjacent to this side to horizontally limit the metal movable cover plate above the support frame. When the metal movable cover plate is in a horizontal state, the metal movable cover plate drives the position switch of the changeover switch to conduct in one position, so that the fixed potential terminal is conducted with the high level.

[0020] Further, when the metal movable cover plate deflects downward under the pressure of the positioning probe, it immediately drives the position switch of the changeover switch to conduct in the second position, so that the fixed potential terminal is conducted to ground.

[0021] As an example, in order to ensure that the positioning probe can effectively slide into the support frame firing drive structure, a herringbone top edge reverse sliding structure is provided above the four sides of the support frame.

[0022] As an example, the high level is 12V or 24V DC; the low level is grounded.

[0023] Furthermore, the positioning probe triggers the conduction of the corresponding binary switch circuit by lowering the probe, thereby determining the center position of the receiving coil.

[0024] As an example, referring to Figure 4 as shown, the positioning probe includes: a signal switch, a motor forward and reverse control circuit, a motor, a probe, a traction rope, a reel, and a contact sensor. One end of the signal switch is electrically connected to one end of the motor forward and reverse control circuit. The other end of the motor forward and reverse control circuit is electrically connected to one end of the motor. The motor is integrally and balancedly connected to one end of the contact sensor. The other end of the contact sensor is electrically connected to another end of the motor forward and reverse control circuit. A reel is connected to the motor shaft of the motor. One end of the traction rope is wound around the reel, and the other end of the traction rope is connected to the probe.

[0025] As an example, the probe is an inverted cone; the self-gravity of the inverted cone is greater than the self-limiting elastic force of the spring structure.

[0026] As an example, the diameter of the inverted cone is slightly larger than the width of the support frame to ensure that the probe will not be stuck after the whole probe slides into the support frame.

[0027] Furthermore, the width of the support frame should be less than the radius of the receiving coil. In the 11KW wireless vehicle charging standard, when the width of the support frame is equal to 1 / 5 of the radius value of the receiving coil under this standard, the offset error between the transmitting coil and the receiving coil during wireless charging can be ensured, and the deviation range in the X (horizontal) direction does not exceed: ±55mm, and the deviation range in the Y (longitudinal) direction does not exceed ±60mm.

[0028] As an example, the industry standard for wireless charging of electric vehicles usually adopts 11KW. When the width of the support frame is equal to 1 / 4 of the radius value of the receiving coil under this standard, the offset error between the transmitting coil and the receiving coil during wireless charging can be ensured, and the deviation range in the X direction does not exceed: ±75mm, and the deviation range in the Y direction does not exceed ±85mm.

[0029] As an example, when more binary switch circuits are provided, the width of the support frame is set smaller, and during wireless charging, the alignment error between the transmitting coil and the receiving coil is smaller; conversely, the alignment error is larger.

[0030] As an example, the contact sensor uses a mechanical balance switch.

[0031] Further, the binary switch circuit is used to receive the positioning signal of the positioning probe, and after being turned on, it sends a high level and / or a low level signal to the central control unit;

[0032] Further, the stepping unit includes: a lateral motor, a longitudinal motor, and their respective equipped guide rails.

[0033] Further, the central control unit uses an MCU processor.

[0034] As an example, the frame line mark is an ordinary parking space marking in a parking lot.

[0035] A positioning method for an automotive wireless charging positioning system, including:

[0036] Step 1: The user to be charged parks the vehicle inside according to the frame line identification, relying on vision for preliminary positioning.

[0037] Further, according to the preliminary position of the receiving coil, multiple groups of binary switch circuits are installed correspondingly.

[0038] As an example, the binary switch circuit is one of 4 groups, 6 groups, 8 groups, and 10 groups.

[0039] Step 2: The user starts wireless charging, and the central control unit issues a control signal to control the positioning probe to move and perform a downward positioning of the probe once.

[0040] Further, after the central control unit issues a control signal, the signal switch is turned on. The motor forward and reverse control circuit is used to control the motor to rotate forward to lower the towing rope, so that the probe is lowered until it gets stuck around the support frame. After the probe touches the bottom, the contact sensor simultaneously senses the new balance state of the motor after the probe touches the bottom. The contact sensor synchronously sends a signal to the motor forward and reverse control circuit to control the motor to immediately stop lowering and reverse, driving the reel to reverse and retract the towing rope and the probe.

[0041] Step 3: After the probe positioning operation, the binary switch circuit is turned on under the downward pressure of the probe's gravity. The I / O port of the central control unit receives the high level and / or low level signal of the binary switch circuit, and finds the charging coordinate for this time according to the fixed coordinate corresponding to the preset binary value.

[0042] As an example, refer to Figure 5 As shown, when there are 16 groups of binary switch circuits, after the sixth group of binary switch circuits are pressed and conducted by the probe, the binary bits change from all high levels 1111 1111 1111 1111 to 11111011 1111 1111; after receiving the positioning binary code, the central control unit can immediately compare the original preset coordinate value corresponding to the binary code.

[0043] Step 4: The central control unit sends a coordinate position signal to the stepping unit, and through image displacement adjustment, controls the stepping unit to move below the receiving coil.

[0044] As an example, refer to Figure 6 As shown, the working process of the stepping unit is exemplified as follows: after receiving the binary signal, the central control unit determines that the preset coordinate value is (+△X, +△Y), and the coordinate position signal sent to the stepping unit 103 is (+△X, +△Y), indicating that the horizontal motor of the stepping unit needs to move forward by △X along the X direction, and the vertical motor needs to move forward by △Y along the Y direction.

[0045] Step 5: After the stepping unit moves below the receiving coil and stops, the central control unit controls the transmitting coil to charge the receiving coil.

[0046] As an example, a rain guide groove is arranged below the binary switch circuit to facilitate the drainage of accumulated water. Beneficial effects

[0047] This invention uses an MCU to receive binary codes. Through the unique binary code corresponding to a unique coordinate value, it simplifies the deficiency that multiple processors are required to separately monitor different detection units in wireless positioning. With a group of processor units, reasonable wireless positioning can be achieved through different numerical values of binary codes. This invention has a simple structure, low hardware circuit design cost, extremely high positioning cost performance, and is suitable for promotion. This invention works safely and reliably, and the later maintenance and the previous installation are convenient and simple. Description of the drawings

[0048] Figure 1 is a schematic diagram of the charging state of a binary positioning system for wireless charging of an automobile according to the present invention

[0049] Figure 2 is a schematic diagram of the structure of a binary switch circuit of a binary positioning system for wireless charging of an automobile according to the present invention

[0050] Figure 3 is a schematic diagram of the drive structure of a binary positioning system for wireless charging of an automobile according to the present invention

[0051] Figure 4 It is a schematic diagram of the positioning probe structure of a binary positioning system for wireless charging of an automobile according to the present invention.

[0052] Figure 5 It is an effect diagram of binary triggering of a binary positioning system for wireless charging of an automobile according to the present invention.

[0053] Figure 6 It is a schematic diagram of the calibration positioning coordinates of the stepping unit of a binary positioning system for wireless charging of an automobile according to the present invention. Embodiment

[0054] Next, refer to the attached Figures 1 to 6 As shown, a binary positioning system for wireless charging of an automobile and its positioning method, wherein: a binary positioning system for wireless charging of an automobile includes: a positioning probe 101, multiple groups of binary switch circuits 102, a stepping unit 103, a central control unit 104, and a frame line identifier.

[0055] Further, referring to Figure 1 As shown, the positioning probe 101 is installed above the center point of the receiving coil 106 on the chassis of the electric vehicle, and the transmitting coil 107 is installed on the stepping unit 103 for wirelessly charging the receiving coil 106. The stepping unit 103 is used to control the transmitting coil 107 to align with the receiving coil 106 to ensure high-efficiency wireless charging. The multiple groups of binary switch circuits 102 are installed side by side on the ground inside the frame line identifier; the central control unit 104 is used to send an opening command to the positioning probe 101, receive the high-level and / or low-level electrical signals sent by the binary switch circuit 102, and control the stepping unit 103 to move into position to align with the receiving coil 106 and turn on the wireless charging by comparing with the corresponding coordinates of the pre-stored binary code; the central control unit 104 is default set to receive a high-level electrical signal as binary code 1 and a low-level electrical signal as binary code 0.

[0056] As an example, when the receiving coil 106 is located at the front of the vehicle, the multiple groups of binary switch circuits 102 are installed side by side on the ground at a position slightly above the center inside the frame line identifier.

[0057] Further, referring to Figure 2As shown, the binary switch circuit 102 includes: a driving structure 201, a change-over switch 202, a pull-up resistor R1, and a pull-down resistor R1'. The fixed-potential terminal of the change-over switch 202 is electrically connected to the I / O terminal of the central control unit 104. One position of the change-over switch 202 is electrically connected to one end of the pull-up resistor R1, the other end of the pull-up resistor R1 is connected to a high level, the second position of the change-over switch 202 is electrically connected to one end of the pull-down resistor R1', and the other end of the pull-down resistor R1' is grounded. The driving structure 201 is used to drive the change-over switch 202 to shift gears.

[0058] Further, the ends of each group of binary switch circuits 102 connected to the high level are all in parallel, the ends of each group of binary switch circuits 102 connected to the low level are all in parallel, and the fixed-potential terminals of each group of binary switch circuits 102 electrically connected to the I / O terminal of the central control unit 104 are all in parallel.

[0059] Further, referring to Figure 3 As shown, the driving structure 201 includes: a support frame 301 with a square shape on all sides, and a metal movable cover plate 302 with a cross-sectional shape and size consistent with that of the support frame 301. The metal movable cover plate 302 is fixed to the upper part of one side of the support frame 301 through a spring structure 303. A limiting structure 304 is arranged above the other side of the support frame 301 adjacent to this side to horizontally limit the metal movable cover plate 302 above the support frame 301. When the metal movable cover plate 302 is in a horizontal state, the metal movable cover plate 302 drives the position switch of the change-over switch 202 to conduct in the first gear, so that the fixed-potential terminal is conducted to the high level.

[0060] Further, when the metal movable cover plate deflects downward under the pressure of the positioning probe, it immediately drives the position switch of the change-over switch 202 to conduct in the second gear, so that the fixed-potential terminal is conducted to the ground.

[0061] As an example, in order to ensure that the positioning probe 101 can effectively slide into the support frame to trigger the driving structure 201, a herringbone top-edge anti-slip structure is arranged above the four sides of the support frame 301.

[0062] As an example, the high level is 12V or 24V direct current; the connection to the low level is grounding.

[0063] Further, the positioning probe 101 triggers the corresponding binary switch circuit 102 to conduct by lowering the probe 404, so as to determine the center position of the receiving coil 106.

[0064] As an example, referring to Figure 4As shown in the figure, the positioning probe 101 includes: a signal switch 401, a motor forward and reverse control circuit 402, a motor 403, a probe 404, a traction rope 405, a reel 406, and a contact sensor 407. One end of the signal switch 401 is electrically connected to one end of the motor forward and reverse control circuit 402. The other end of the motor forward and reverse control circuit 402 is electrically connected to one end of the motor 403. The motor 403 is integrally and balancedly connected to one end of the contact sensor 407. The other end of the contact sensor 407 is electrically connected to another end of the motor forward and reverse control circuit 402. The motor shaft of the motor 403 is connected to the reel 406. One end of the traction rope 405 is wound around the reel 406, and the other end of the traction rope 405 is connected to the probe 404.

[0065] As an example, the probe 404 is an inverted cone; the self-gravity of the inverted cone is greater than the self-limiting elastic force of the spring structure 303.

[0066] As an example, the diameter of the inverted cone is slightly larger than the width of the support frame 301, ensuring that the probe 404 will not be stuck after being completely inserted into the support frame 301.

[0067] Furthermore, the width of the support frame 301 should be less than the radius of the receiving coil 106. In the 11KW wireless vehicle charging standard, when the width of the support frame 301 is equal to 1 / 5 of the radius value of the receiving coil under this standard, the offset error between the transmitting coil 107 and the receiving coil 106 during wireless charging can be ensured, and the deviation range in the X (lateral) direction does not exceed ±55mm, and the deviation range in the Y (longitudinal) direction does not exceed ±60mm.

[0068] As an example, the industry standard for wireless charging of electric vehicles usually adopts 11KW. When the width of the support frame 301 is equal to 1 / 4 of the radius value of the receiving coil 106 under this standard, the offset error between the transmitting coil 107 and the receiving coil 106 during wireless charging can be ensured, and the deviation range in the X direction does not exceed ±75mm, and the deviation range in the Y direction does not exceed ±85mm.

[0069] As an example, the more binary switch circuits 102 are set, the smaller the width of the support frame 301 is set. During wireless charging, the alignment error between the transmitting coil 107 and the receiving coil 106 is smaller, and vice versa, the alignment error is larger.

[0070] As an example, the contact sensor 407 uses a mechanical balance switch.

[0071] Further, the binary switch circuit 102 is configured to receive the positioning signal of the positioning probe 101, and after being turned on, send a high-level and / or low-level signal to the central control unit 104.

[0072] Further, the stepping unit 103 includes: a lateral motor, a longitudinal motor, and respective equipped guide rails 108.

[0073] Further, the central control unit 104 employs an MCU processor.

[0074] As an example, the frame line mark is the ordinary parking space marking.

[0075] A positioning method for an automotive wireless charging positioning system includes:

[0076] Step 1: The user to be charged parks the vehicle initially by vision according to the frame line identification and docks it therein.

[0077] Further, according to the initial position of the receiving coil 106, multiple groups of binary switch circuits 102 are installed correspondingly.

[0078] As an example, the binary switch circuit 102 is one of 4 groups, 6 groups, 8 groups, and 10 groups.

[0079] Step 2: The user activates the wireless charging, and the central control unit 104 issues a control signal to control the positioning probe 101 to act and perform a downward positioning of the probe 404 once.

[0080] Further, after the central control unit 104 issues a control signal, the signal switch 401 is turned on, and the motor forward and reverse control circuit 402 controls the motor 403 to rotate forward to lower the tow rope 405, so that the probe 404 is lowered until it gets stuck around the support frame 301. After the probe 404 touches the bottom, the contact sensor 407 simultaneously senses the new equilibrium state of the motor 403 after the probe 404 touches the bottom. The contact sensor 407 synchronously sends a signal to the motor forward and reverse control circuit 402 to control the motor 403 to immediately stop lowering and reverse, driving the reel 406 to reverse and retract the tow rope 405 and the probe 404.

[0081] Step 3: After the positioning operation of the probe 404, the binary switch circuit 102 is turned on under the gravity pressure of the probe 404. The I / O port of the central control unit 104 receives the high-level and / or low-level signal of the binary switch circuit 102, and finds out the charging coordinate for this time according to the fixed coordinate corresponding to the preset binary value.

[0082] As an example, refer to Figure 5As shown, when there are 16 groups of binary switch circuits 102, after the sixth group of the binary switch circuits is pressed down and conducted by the probe 404, the binary bits change from all high levels 1111 1111 1111 1111 to 1111 1011 1111 1111. After receiving the positioning binary code, the central control unit 104 can immediately compare the original preset coordinate value corresponding to the binary code.

[0083] Step Four: The central control unit 104 sends a coordinate position signal to the stepping unit 103, and through image displacement adjustment, controls the stepping unit 103 to move below the receiving coil 106.

[0084] As an example, refer to Figure 6 As shown, the working process of the stepping unit 103 is exemplified as follows: After receiving the binary signal, the central control unit 104 determines that the preset coordinate value is (+△X, +△Y), and the coordinate position signal sent to the stepping unit 103 is (+△X, +△Y), indicating that the horizontal motor of the stepping unit 103 needs to move forward by △X along the X direction, and the vertical motor needs to move forward by △Y along the Y direction.

[0085] Step Five: After the stepping unit 103 moves to a stop below the receiving coil 106, the central control unit 104 controls the transmitting coil 107 to charge the receiving coil 106.

[0086] As an example, a rainwater guide groove is provided below the binary switch circuit 102 to facilitate the drainage of accumulated water.

[0087] This invention uses an MCU to receive binary codes. By uniquely determining that a binary code corresponds to a unique coordinate value, it simplifies the deficiency that multiple processors are required to separately monitor different detection units in wireless positioning. One set of MCU units can perform reasonable wireless positioning based on different binary code values. This invention has a simple structure, low hardware circuit design cost, extremely high positioning cost performance, and is suitable for promotion. This invention works safely and reliably, and the later maintenance and the initial installation are convenient and simple.

[0088] The above disclosure is only a specific embodiment of the present application, but the present application is not limited thereto. Any changes that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. An automotive wireless charging binary positioning system, characterized in that, Including: a positioning probe, multiple groups of binary switch circuits, a stepping unit, a central control unit, and a frame line identifier; The positioning probe is installed above the center point of the receiving coil on the electric vehicle chassis, and the transmitting coil is installed on the stepping unit for wireless charging of the receiving coil. The stepping unit is used to control the alignment of the transmitting coil with the receiving coil. Multiple groups of the binary switch circuits are installed side by side on the ground inside the frame line identifier; The binary switch circuit includes: a driving structure, a changeover switch, a pull-up resistor R1, and a pull-down resistor R1'. The fixed potential terminal of the changeover switch is electrically connected to the I / O terminal of the central control unit. One gear of the changeover switch is electrically connected to one end of the pull-up resistor R1, the other end of the pull-up resistor R1 is connected to a high level, the second gear of the changeover switch is electrically connected to one end of the pull-down resistor R1', and the other end of the pull-down resistor R1' is grounded; The driving structure includes: a support frame with a square shape on all four sides, and a metal movable cover plate. The metal movable cover plate is fixed to the upper part of one side of the support frame through a spring structure. A limiting structure is provided above the other side adjacent to this side of the support frame to horizontally limit the metal movable cover plate above the support frame. When the metal movable cover plate is in a horizontal state, the metal movable cover plate drives the gear switch of the changeover switch to conduct the first gear. When the metal movable cover plate deflects downward under the pressure of the positioning probe, it drives the gear switch of the changeover switch to conduct the second gear; The width of the support frame is smaller than the radius of the receiving coil; One end of each group of the binary switch circuits connected to the high level is connected in parallel, one end of each group of the binary switch circuits connected to the low level is connected in parallel, and the fixed potential terminals of each group of the binary switch circuits electrically connected to the I / O terminal of the central control unit are connected in parallel; connecting to the low level means grounding; The positioning probe includes: a signal switch, a motor forward and reverse control circuit, a motor, a probe, a traction rope, a reel, and a contact sensor. One end of the signal switch is electrically connected to one end of the motor forward and reverse control circuit, the other end of the motor forward and reverse control circuit is electrically connected to one end of the motor, the whole motor is balancedly connected to one end of the contact sensor, the other end of the contact sensor is electrically connected to another end of the motor forward and reverse control circuit, the motor shaft of the motor is connected with a reel, one end of the traction rope is wound on the reel, and the other end of the traction rope is connected to the probe.

2. The binary positioning system for wireless charging of an automobile according to claim 1, wherein the central control unit is used to send an opening command to the positioning probe, receive the high-level and / or low-level electrical signals sent by the binary switch circuit, and control the stepping unit to move into position to align with the receiving coil and start wireless charging by comparing with the corresponding coordinates of the pre-stored binary code.

3. The binary positioning system for wireless charging of an automobile according to claim 1, wherein a herringbone top edge anti-slip structure is provided above the four sides of the support frame.

4. The binary positioning system for wireless charging of an automobile according to claim 1, wherein The probe is an inverted conical body; the self-gravity of the inverted cone is greater than the self-limiting elastic force of the spring structure.

5. The binary positioning system for wireless charging of an automobile according to claim 4, characterized in that, The diameter of the inverted conical body is slightly larger than the width of the support frame.

6. The binary positioning system for wireless charging of an automobile according to claim 1, characterized in that, The stepping unit includes: a lateral motor, a longitudinal motor, and their respective equipped guide rails.

7. A binary positioning system for wireless charging of an automobile according to claim 1, characterized in that, The central control unit uses an MCU processor.

Images