CN210454520U

CN210454520U - Electric bicycle wireless charging coil calibrating device

Info

Publication number: CN210454520U
Application number: CN201921435510.6U
Authority: CN
Inventors: 黄晓生; 孔毅鹏; 田源; 黄靖; 林抒毅
Original assignee: Fujian University of Technology
Current assignee: Fujian University of Technology
Priority date: 2019-08-31
Filing date: 2019-08-31
Publication date: 2020-05-05
Anticipated expiration: 2029-08-31

Abstract

The utility model relates to an electric bicycle wireless charging coil calibrating device, including the transmitting terminal device that is located charging system and the receiving terminal device that is located electric bicycle, the transmitting terminal device includes transmitting terminal support, motion, transmitting terminal control unit and installs the transmission platform of wireless charging coil, and the motion is located on the transmitting terminal support to carry out upper and lower, horizontal and longitudinal motion on it, and the transmission platform is installed on the motion, and the transmission platform center is equipped with signal transmitter, in order to send calibration signal to the receiving terminal device; the receiving end device comprises a receiving end support, a receiving end control unit and a receiving platform provided with a wireless charging coil, wherein the receiving platform is arranged on the receiving end support, and a plurality of signal receivers are distributed in the center and around the receiving platform to receive the calibration signals. The device is favorable to calibrating the relative position between charging system and electric bicycle's the wireless charging coil, improves wireless charging efficiency.

Description

Electric bicycle wireless charging coil calibrating device

Technical Field

The utility model relates to an electric bicycle wireless charging technology field, concretely relates to electric bicycle wireless charging coil calibrating device.

Background

With the development of wireless charging technology, more and more electronic products and electric vehicles support the wireless charging technology, and the wireless charging system of the electric bicycle is also paid much attention. The wireless charging system of the electric bicycle overcomes the defects of the existing wired charging and has the advantages of convenience, reliability, safety, strong environmental adaptability and the like. The principle of wireless transmission of electric energy is by magnetic field coupling between the transmitting coil and the receiving coil. The magnetic coupling type wireless power transmission system requires that the distance between two coils is proper and the position is aligned to efficiently transmit power, and if deviation exists, the coupling effect and the transmission efficiency are influenced.

Patent CN109050306A is a method for aligning two coils by moving a movable trolley with a transmitting coil, and measuring the magnitude of charging power by adding small power to charge and changing the height of the trolley. For a space under the electric bicycle that is much smaller than a space under the electric vehicle, the cart is unlikely to move accurately to a desired position in a small space. And for electric bicycles, it is not possible to place a cart underneath to move the location of the wireless charging coil. The patent CN108973737A discloses that the alignment is achieved by image processing technology, and the position of the electric vehicle (receiving coil) is changed by human active behavior or an automatic parking system, the used technology is costly, and is not suitable for the electric bicycle, and the user cannot achieve the requirement of actively changing the position accuracy of the electric bicycle according to the feedback information. In the prior art, although the alignment of the coils can be achieved by mechanically controlling the position of the coils, this method has problems of mechanical lifetime and cost. Because the charging transmitting terminal is embedded underground, the maintenance is not convenient.

Disclosure of Invention

An object of the utility model is to provide an electric bicycle wireless charging coil calibrating device, the device do benefit to the relative position between calibration charging system and electric bicycle's the wireless charging coil, improve wireless charging efficiency.

In order to achieve the above purpose, the technical scheme of the utility model is that: a wireless charging coil calibration device for an electric bicycle comprises a transmitting end device located on a charging system and a receiving end device located on the electric bicycle, wherein the transmitting end device comprises a transmitting end support, a moving mechanism, a transmitting end control unit and a transmitting platform provided with a wireless charging coil, the moving mechanism is arranged on the transmitting end support, the transmitting platform is arranged on the moving mechanism and driven by the moving mechanism to move up and down, transversely and longitudinally, a signal transmitter is arranged in the center of the transmitting platform to send a calibration signal to the receiving end device, and the input end and the output end of the transmitting end control unit are respectively electrically connected with the signal transmitter and the moving mechanism; the receiving end device comprises a receiving end support, a receiving end control unit and a receiving platform provided with a wireless charging coil, the receiving platform is arranged on the receiving end support, a plurality of signal receivers are distributed in the center and around the receiving platform to receive calibration signals, the input end of the receiving end control unit is electrically connected with the signal receivers, and the transmitting end control unit is connected with the receiving end control unit through a wireless network.

Furthermore, a track groove is formed in the transmitting end support, the moving mechanism comprises a lead screw arranged in the transverse direction, a lead screw motor used for driving the lead screw to rotate, a sliding table matched with the lead screw to move transversely along the length direction of the lead screw, an electric push rod used for driving the sliding table and the lead screw to move longitudinally as a whole, and a longitudinal rod arranged in the longitudinal direction, the lead screw motor is arranged at one end of the lead screw to drive the lead screw to rotate, the longitudinal rod penetrates through the sliding table and is connected with the sliding table in a rotating mode to support the sliding table and limit the rotation of the sliding table, so that the sliding table can only slide transversely along the lead screw, the electric push rod is arranged at one end of the longitudinal rod and drives the sliding table to move longitudinally, and rollers are arranged at two ends; the sliding table is provided with a lifting mechanism, and the launching platform is installed on the lifting mechanism to move up and down.

Furthermore, a track groove is formed in the transmitting end support, the moving mechanism comprises a transverse moving mechanism, a longitudinal moving mechanism and a sliding table, the sliding table is arranged on the transverse moving mechanism and the longitudinal moving mechanism and driven by the transverse moving mechanism and the longitudinal moving mechanism to move transversely and longitudinally, the transverse moving mechanism and the longitudinal moving mechanism are arranged on the transmitting end support and used for moving transversely and longitudinally, a lifting mechanism is arranged on the sliding table, and the transmitting platform is mounted on the lifting mechanism and used for moving up and down; the transverse movement mechanism mainly comprises a transverse movement rod arranged along the longitudinal direction, a first motor used for driving the transverse movement rod to rotate and a roller driven by the transverse movement rod to rotate so as to perform transverse movement on the track groove, and the transverse movement rod penetrates through the sliding table and is in rotary connection with the sliding table so as to drive the sliding table to perform transverse movement when the transverse movement mechanism works; the longitudinal movement mechanism mainly comprises a longitudinal movement rod arranged transversely, a second motor used for driving the longitudinal movement rod to rotate and a roller driven by the longitudinal movement rod to rotate so as to perform longitudinal movement on the track groove, and the longitudinal movement rod penetrates through the sliding table and is rotatably connected with the sliding table so as to drive the sliding table to perform longitudinal movement when the longitudinal movement mechanism works.

Furthermore, the central position of the receiving platform is provided with 1 signal receiver B0, and the four quadrant points of the front, the back, the left and the right are symmetrically provided with 4 signal receivers B1, B2, B3 and B4.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides an electric bicycle wireless charging coil calibrating device, utilize the signal transmitter on the transmission platform and the signal receiver on the receiving platform to find range, try out transmission platform and receiving platform's relative position information, control the transmission platform in view of the above and carry out corresponding motion, relative position between calibration charging system and electric bicycle's the wireless charging coil realizes the calibration of wireless charging coil charging position, provides wireless charging efficiency, has very strong practicality and wide application prospect.

Drawings

Fig. 1 is a front view of a transmitting end device in a calibration device according to an embodiment of the present invention.

Fig. 2 is a top view of a transmitting end device in the calibration device according to the embodiment of the present invention.

Fig. 3 is a front view of a receiving end device in the calibration device according to an embodiment of the present invention.

Fig. 4 is a top view of a receiving end device in the calibration device according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of an embodiment of the present invention in which the signal transmitter a0 is located in the third quadrant of the receiving platform.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The utility model provides an electric bicycle wireless charging coil calibrating device, as shown in fig. 1, 2, 3, 4, including the transmitting terminal device that is located charging system and the receiving terminal device that is located electric bicycle, the transmitting terminal device includes transmitting terminal support 1, motion, transmitting terminal the control unit 2 and installs wireless charging coil 3's transmission platform 4, motion locates on transmitting terminal support 1, transmission platform 4 installs on motion to carry out up-and-down, horizontal and longitudinal movement under its drive, transmitting platform 4 center is equipped with signal transmitter A0, in order to send calibration signal to the receiving terminal device, the input of transmitting terminal the control unit 2, output respectively with signal transmitter A0, motion electric connection; the receiving terminal device includes receiving terminal support 5, receiving terminal the control unit 6 and installs the receiving platform 8 of wireless charging coil 7, receiving platform 8 installs on receiving terminal support 5, receiving platform 8's central point puts and is equipped with 1 signal receiver B0, and four points of picture are equipped with 4 signal receivers B1, B2, B3, B4 on the symmetry all around to receive the calibration signal, receiving terminal the control unit 6's input respectively with each signal receiver electric connection, transmitting terminal the control unit 2 passes through wireless network connection with receiving terminal the control unit 6.

In this embodiment, the transmitting end support 1 is provided with a track groove 9, the moving mechanism includes a lead screw 10 arranged in a transverse direction, a lead screw motor for driving the lead screw 10 to rotate, a sliding table 11 matched with the lead screw 10 to move transversely along the length direction of the lead screw, an electric push rod 12 for driving the sliding table 11 and the lead screw to move longitudinally as a whole, and a longitudinal rod 13 arranged in the longitudinal direction, the lead screw motor is arranged at one end of the lead screw 10 to drive the lead screw 10 to rotate, the longitudinal rod 13 passes through and is rotatably connected with the sliding table 11 to support the sliding table 11 and limit the rotation of the sliding table 11, so that the sliding table 11 can only slide transversely along the lead screw 10, the electric push rod 12 is arranged at one end of the longitudinal rod 13 and drives the sliding table 11 to move longitudinally, and rollers 14 are arranged at two ends of the lead screw 10 and the longitudinal rod; the sliding table 11 is provided with a lifting mechanism 15 driven by an electric push rod, and the launching platform 4 is installed on the lifting mechanism 15 to move up and down.

The movement mechanism can also have other realization forms. In another embodiment of the present invention, the transmitting terminal support is provided with a track groove, the moving mechanism includes a transverse moving mechanism, a longitudinal moving mechanism and a sliding table disposed on the two for performing transverse and longitudinal movement under the driving of the two, the transverse moving mechanism and the longitudinal moving mechanism are disposed on the transmitting terminal support for performing transverse and longitudinal movement thereon, the sliding table is provided with a lifting mechanism, and the transmitting platform is mounted on the lifting mechanism for performing up-and-down movement; the transverse movement mechanism mainly comprises a transverse movement rod arranged along the longitudinal direction, a first motor used for driving the transverse movement rod to rotate and a roller driven by the transverse movement rod to rotate so as to perform transverse movement on the track groove, and the transverse movement rod penetrates through the sliding table and is in rotary connection with the sliding table so as to drive the sliding table to perform transverse movement when the transverse movement mechanism works; the longitudinal movement mechanism mainly comprises a longitudinal movement rod arranged transversely, a second motor used for driving the longitudinal movement rod to rotate and a roller driven by the longitudinal movement rod to rotate so as to perform longitudinal movement on the track groove, and the longitudinal movement rod penetrates through the sliding table and is rotatably connected with the sliding table so as to drive the sliding table to perform longitudinal movement when the longitudinal movement mechanism works.

The working process of the utility model is as follows:

step S1, when the electric bicycle stops on the charging system, the charging system detects the charging demand, activates the calibration device, and the transmitting terminal device on the charging system and the receiving terminal device on the electric bicycle are paired in communication;

step S2, a signal emitter of the emitting end device sends out a calibration signal;

step S3, each signal receiver of the receiving end device receives the calibration signal, the receiving end control unit calculates the distance from the signal transmitter to each signal receiver according to the ranging principle, the relative position information of the transmitting platform and the receiving platform is solved, and the relative position information is transmitted to the transmitting end control unit through the wireless network;

and step S4, the transmitting terminal control unit judges whether the relative position information meets the set position requirement, if so, the calibration is finished, the charging can be carried out, otherwise, the motion mechanism is controlled to drive the transmitting platform to carry out the vertical, horizontal and longitudinal motion in the corresponding distance according to the received relative position information, and then, the step S2 is returned to measure the distance again.

In this embodiment, the central position of the receiving platform is provided with 1 signal receiver B0, four quadrant points, front, back, left and right, are symmetrically provided with 4 signal receivers B1, B2, B3, and B4, the signal receivers B0, B1, B2, B3, and B4 receive calibration signals sent by the signal transmitter a0, the receiving end control unit calculates distances d0, d1, d2, d3, and d4 from the signal transmitter a0 to the signal receivers B0, B1, B2, B3, and B4, respectively, according to the distance measurement principle, the quadrant position of the receiving platform where the signal transmitter a0 is located is determined: when d1 and d4 are both smaller than d2 and d3, A0 is located in the first quadrant, and the relative position information of the transmitting platform and the receiving platform is obtained through d0, d1 and d 4; when d1 and d2 are both smaller than d3 and d4, A0 is located in the second quadrant, and the relative position information of the transmitting platform and the receiving platform is obtained through d0, d1 and d 2; when d2 and d3 are both smaller than d1 and d4, A0 is located in the third quadrant, and the relative position information of the transmitting platform and the receiving platform is obtained through d0, d2 and d 3; and when d3 and d4 are both smaller than d1 and d2, A0 is positioned in the fourth quadrant, and the relative position information of the transmitting platform and the receiving platform is obtained through d0, d3 and d 4.

As shown in fig. 5, signal emitter a0 is in the third quadrant for example. Assuming that a0 is in the third quadrant, the range measurements relate only to a0, B0, B2, and B3.

According to the Pythagorean theorem

The distance d0 from a0 to B0 is measured, the distance h between the two coils is known, let a = d0 and B = h, the distance L0a from a1 to B0 of a0 at the receiving end is calculated, and similarly, the distance L2a from a1 to B2 of a0 projection point is obtained.

Then according to

The distance from B0 to B2 is L02, and projection points of B0, B2 and A0 form a triangle. Let a = L0a, b = L2a, and c = L02 calculate the distance y from the projection point of a0 to the X-axis.

Similarly, a triangle formed by B0, B3 and A0 projection points is calculated, and the distance between the A0 projection point and the Y axis is calculated, namely x.

Re-ranging, whether the distance from A0 to B0 is within an allowable range with the calculated height error, and if the distance is the same as the calculated height error, activating the wireless charging system; if not, ranging is carried out again to change the position until the precision requirement is met.

a, b, c represent the three sides of the triangle, S represents the area of the triangle, and h represents the height of the triangle with the base for c.

In this embodiment, the signal transmitter and signal receiver may be visible light, laser, or other communication devices.

The RSSI ranging principle is as follows: during positioning, the received signal strength, the transmitted signal strength and the distance between the receiving end and the transmitting end are determined to construct a signal strength-distance attenuation model, the received signal strength and the transmitted signal strength are measured, and the position of a point to be positioned is calculated.

RSSI is the received power of the wireless signal, P is the transmitted power of the wireless signal, d is the distance between the receiving end and the transmitting end, and n is the environmental attenuation factor. The accurate distance measurement is realized by improving the distance measurement principle.

Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.

Claims

1. A wireless charging coil calibration device of an electric bicycle is characterized by comprising a transmitting end device positioned on a charging system and a receiving end device positioned on the electric bicycle, wherein the transmitting end device comprises a transmitting end support, a moving mechanism, a transmitting end control unit and a transmitting platform provided with a wireless charging coil, the moving mechanism is arranged on the transmitting end support, the transmitting platform is arranged on the moving mechanism and driven by the moving mechanism to move up and down, transversely and longitudinally, a signal transmitter is arranged in the center of the transmitting platform to transmit a calibration signal to the receiving end device, and the input end and the output end of the transmitting end control unit are respectively electrically connected with the signal transmitter and the moving mechanism; the receiving end device comprises a receiving end support, a receiving end control unit and a receiving platform provided with a wireless charging coil, the receiving platform is arranged on the receiving end support, a plurality of signal receivers are distributed in the center and around the receiving platform to receive calibration signals, the input end of the receiving end control unit is electrically connected with the signal receivers, and the transmitting end control unit is connected with the receiving end control unit through a wireless network.

2. The device for calibrating the wireless charging coil of the electric bicycle according to claim 1, wherein a track groove is formed on the transmitting end support, the moving mechanism comprises a lead screw arranged in the transverse direction, a lead screw motor for driving the lead screw to rotate, a sliding table matched with the lead screw to transversely move along the length direction of the lead screw, an electric push rod for driving the sliding table and the lead screw to integrally longitudinally move, and a longitudinal rod arranged in the longitudinal direction, the lead screw motor is arranged at one end of the lead screw to drive the lead screw to rotate, the longitudinal rod penetrates through and is rotatably connected with the sliding table to support the sliding table and limit the rotation of the sliding table, so that the sliding table can only transversely slide along the lead screw, the electric push rod is arranged at one end of the longitudinal rod and drives the sliding table to longitudinally move, and rollers are arranged at two ends of the lead screw and two ends of; the sliding table is provided with a lifting mechanism, and the launching platform is installed on the lifting mechanism to move up and down.

3. The device for calibrating the wireless charging coil of the electric bicycle according to claim 1, wherein the transmitting end support is provided with a track groove, the moving mechanism comprises a transverse moving mechanism, a longitudinal moving mechanism and a sliding table which is arranged on the transverse moving mechanism and the longitudinal moving mechanism and driven by the transverse moving mechanism and the longitudinal moving mechanism, the transverse moving mechanism and the longitudinal moving mechanism are arranged on the transmitting end support to move transversely and longitudinally on the transmitting end support, the sliding table is provided with a lifting mechanism, and the transmitting platform is mounted on the lifting mechanism to move up and down; the transverse movement mechanism mainly comprises a transverse movement rod arranged along the longitudinal direction, a first motor used for driving the transverse movement rod to rotate and a roller driven by the transverse movement rod to rotate so as to perform transverse movement on the track groove, and the transverse movement rod penetrates through the sliding table and is in rotary connection with the sliding table so as to drive the sliding table to perform transverse movement when the transverse movement mechanism works; the longitudinal movement mechanism mainly comprises a longitudinal movement rod arranged transversely, a second motor used for driving the longitudinal movement rod to rotate and a roller driven by the longitudinal movement rod to rotate so as to perform longitudinal movement on the track groove, and the longitudinal movement rod penetrates through the sliding table and is rotatably connected with the sliding table so as to drive the sliding table to perform longitudinal movement when the longitudinal movement mechanism works.

4. The wireless charging coil calibration device for electric bicycles of claim 1, wherein the center of the receiving platform is provided with 1 signal receiver B0, and the four points of view of front, back, left and right are symmetrically provided with 4 signal receivers B1, B2, B3 and B4.