WO2024113720A1 - Wireless charging positioning calibration apparatus and calibration method - Google Patents

Wireless charging positioning calibration apparatus and calibration method Download PDF

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Publication number
WO2024113720A1
WO2024113720A1 PCT/CN2023/096410 CN2023096410W WO2024113720A1 WO 2024113720 A1 WO2024113720 A1 WO 2024113720A1 CN 2023096410 W CN2023096410 W CN 2023096410W WO 2024113720 A1 WO2024113720 A1 WO 2024113720A1
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WO
WIPO (PCT)
Prior art keywords
coil
calibration
transmitting end
frame
end coil
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PCT/CN2023/096410
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French (fr)
Chinese (zh)
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冯颖盈
姚顺
邓远洋
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深圳威迈斯新能源股份有限公司
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Publication of WO2024113720A1 publication Critical patent/WO2024113720A1/en

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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Definitions

  • the present invention relates to the field of wireless charging of vehicle-mounted systems, and in particular to a wireless charging positioning calibration device and a calibration method.
  • Wireless transmission refers to wireless charging.
  • the pile end first rectifies the industrial frequency AC into high-voltage DC, then converts it into high-frequency AC through an inverter, and finally transmits it to the transmitter end through a cable.
  • the pile end is similar to a charging pile; the transmitter end, i.e. the ground end, is actually composed of a coil and a magnetic core. It generates a magnetic field through high-frequency AC and transmits energy to the vehicle end through magnetic coupling; the receiver end, i.e. the vehicle end, integrates a receiving device and a current conversion device.
  • the receiving device is actually composed of a coil and a magnetic core.
  • the energy received from the transmitter end is converted into high-voltage DC through a current conversion device to charge the high-voltage battery of a new energy vehicle, similar to an on-board charger.
  • the wireless charging system must have the ability to accurately align the receiver with the transmitter.
  • positioning coils are usually installed on the transmitter and the receiver, and the resonance principle is used to achieve this.
  • the current technology cannot achieve a good precise positioning function and cannot accurately guide the car owner to park.
  • the present invention proposes a wireless charging positioning calibration device and a calibration method.
  • the technical solution of the present invention is to propose a wireless charging positioning calibration device, including a calibration coil arranged above a transmitting end coil and used to calibrate the transmitting end coil, and also including:
  • a first controller is connected to the calibration coil and can provide an excitation signal to the calibration coil to make the calibration coil conductive;
  • the second controller is connected to the transmitting end coil and is used to collect voltage parameters on the transmitting end coil and calculate the calibration coefficient of each coil frame in the transmitting end coil according to the voltage parameters to calibrate the transmitting end coil.
  • the calibration coil is a multi-coil array, and the coil frame in the calibration coil is matched with the coil frame in the transmitting end coil one by one, and the shape of the coil frame in the calibration coil is one of circular, triangular and square.
  • the calibration coil is installed between 20 mm and 300 mm above the transmitting end coil.
  • the present invention also proposes a wireless charging positioning calibration method, comprising:
  • the calibration coefficient of each coil frame in the transmitting end coil is recorded by the second controller, and the calibration of the transmitting end coil is completed.
  • the transmitting end coil is calibrated according to the voltage parameter, including:
  • the calibration coefficient of each coil frame in the transmitting end coil is calculated according to the average voltage parameter, and the calibration coefficient is the ratio of the average voltage parameter to the voltage parameter on each coil frame.
  • the second controller records the calibration coefficient, it also includes: labeling each coil frame on the transmitting end coil, and matching multiple calibration coefficients with the coil frames one by one, so that each coil frame has a unique corresponding label and calibration coefficient.
  • detecting the voltage parameter on the transmitting end coil includes:
  • the coil frames in the transmitting end coil are calibrated in sequence, and the detection action is repeated until all the coil frames of the transmitting end coil are detected.
  • the method further includes: converting the voltage parameter and the average voltage parameter into a detection value through a second controller, and calculating the calibration coefficient through the detection value.
  • the wireless charging positioning calibration method further includes:
  • the calibration is considered to be successful.
  • the present invention has at least the following beneficial effects:
  • the present invention provides a wireless charging positioning calibration method, which can achieve more accurate alignment between a transmitting end and a receiving end, thereby improving the user experience and charging efficiency of the car owner.
  • FIG1 is an equivalent circuit diagram when the transmitting coil is close to metal
  • FIG2 is a block diagram of a wireless charging system according to the present invention.
  • FIG3 is a schematic diagram of calibration on a calibration coil of the present invention.
  • FIG4 is a schematic diagram of the structure of a calibration coil
  • FIG5 is a schematic diagram of the structure of a calibration coil in another embodiment of the present invention.
  • FIG6 is a schematic structural diagram of a calibration coil in another preferred embodiment of the present invention.
  • FIG. 7 is a flowchart of the calibration process of the present invention.
  • the alignment of the transmitter installed on the ground or underground and the receiver installed on the vehicle directly affects the power transmission efficiency of wireless charging. Therefore, the wireless charging system must have the ability to accurately align the receiver with the transmitter.
  • the idea of the present invention is to propose a wireless charging positioning calibration device and calibration method. By setting a calibration coefficient for each coil frame in the transmitter coil, when aligning the transmitter and the receiver, the calibrated voltage parameters are used for alignment, avoiding the problem of deviation in the calculated coordinates caused by inconsistent impedance changes of each coil frame.
  • the wireless charging system includes a pile end, a transmitter end, and a receiver end. It takes power from the pile end and provides it to the transmitter end.
  • the transmitter end includes a transmitter end aluminum plate, a transmitter end magnetic core, and a transmitter end coil.
  • the receiver end includes a receiver end aluminum plate, a receiver end magnetic core, and a receiver end coil. After the transmitter end is powered on, its transmitter end coil will be magnetically coupled with the receiver end coil, thereby generating an induced current in the receiver end coil and supplying power to the load.
  • the receiver end is installed on the vehicle, also known as the vehicle end. The induced current generated on it can power the vehicle-mounted system, thereby realizing the wireless charging function of the vehicle-mounted system.
  • the transmitter coil can be equivalent to a coupled transmitter coil inductance. The equivalent resistance on it .
  • the transmitting coil can be expressed as:
  • w is the angular frequency of the current signal in the receiving coil
  • M is the mutual inductance coefficient
  • the impedance change can be simplified to:
  • Qcoil is the quality factor of the detection coil. It can be seen that the change in impedance is amplified, which improves the detection sensitivity.
  • N0 ⁇ N4 the coordinates of N0 ⁇ N4 are (0, 0), (0, 10), (10, 0) (0, -10), (-10, 0) respectively.
  • the receiver coil is located directly above N0, its N1 ⁇ N4 coordinates cancel each other out, and the final receiver coil coordinate is (0, 0).
  • FIG3(b) performs weighted calculation on the coordinates of the nine frames including N0, which requires large amount of calculation but the result is more accurate.
  • the resonance frequency, quality factor and other parameters of each coil frame in the transmitting coil are different, resulting in different impedance changes when the same receiving coil is located directly above the transmitting coil. That is, when the receiving positioning coil is located directly above N0, under ideal conditions, the voltage change of N0 is the largest, and the voltage change of its surrounding frames is less than and equal to N0.
  • the impedance changes of each frame there are large differences in the impedance changes of each frame, which causes errors in weighted calculation.
  • the present invention proposes a wireless charging positioning calibration device, which includes a calibration coil disposed above the transmitting end coil and used to calibrate the transmitting end coil, and:
  • a first controller is connected to the calibration coil and can provide an excitation signal to the calibration coil to make the calibration coil conductive;
  • the second controller is connected to the transmitting end coil and is used to collect voltage parameters on the transmitting end coil and calculate the calibration coefficient of each coil frame in the transmitting end coil according to the voltage parameters to calibrate the transmitting end coil.
  • the above-mentioned voltage parameter is the voltage change (the voltage change before and after the excitation signal is sent).
  • the design idea of the present invention is to simulate the receiving end coil by the calibration coil to change the impedance on the transmitting end coil, and then obtain the voltage change of each coil frame on the transmitting end coil (which can be used to reflect the impedance change), and calculate the calibration coefficient of each coil frame according to the voltage change, so that the product of the voltage change on each coil frame and its calibration coefficient is the same, and then when the transmitting end coil and the receiving end coil are aligned, the calibration coefficient is applied to the coil frame of each transmitting end coil to eliminate the error caused by the different impedance changes and improve the accuracy of alignment.
  • Figure 4 is a plan view of the calibration coil array in one embodiment of the present invention, on which the coil is wound in a square shape.
  • the calibration coil array is the same as the transmitting end coil array, and each coil frame corresponds to the coil frame in the transmitting end.
  • the resonant frequency is adjusted by adjusting the resonant capacitor size, so that the detection value change caused by the calibration coil array at the transmitting end is the same as that at the receiving end, playing the role of simulating the receiving end coil.
  • the controller selects each individual coil frame inside the positioning coil through the internal address line.
  • the calibration coil includes a plurality of coil frames, and the coil frames in the calibration coil are matched with the coil frames in the transmitting end coil one by one, and the shape of the coil frames in the calibration coil is one of circular, triangular and square.
  • the area of the calibration coil can be enlarged so that the calibration coil single coil frame covers the four independent coil frames of the transmitting coil.
  • This method can calibrate the coefficients of the four coil frames at the same time, shortening the calibration time.
  • the specific number of covered frames can be adjusted according to actual conditions, usually between 1 and 8.
  • the calibration coil and the receiving coil can be wound on a PCB board or with copper wire to save costs.
  • the calibration coil is installed between 20 mm and 300 mm above the transmitting end coil.
  • the present invention also proposes a wireless charging positioning calibration method, which includes:
  • the calibration coefficient of each coil frame in the transmitting end coil is recorded by the second controller, and the calibration of the transmitting end coil is completed.
  • the calibration coil can simulate the receiving end coil. After the calibration coefficient of each coil frame is recorded by the second controller, the calibration coefficient can be directly used to calibrate each coil frame when aligning the receiving end coil, thereby avoiding errors caused by different impedance changes.
  • the transmitting coil includes four coil frames.
  • the voltage parameter changes caused by the impedance change of each coil frame are 100mV, 125mV, 175mV, and 200mV, respectively.
  • four matching calibration coefficients can be obtained, which are 1.5, 1.2, 0.857, and 0.75, respectively.
  • the calibration coefficient corrects the weight of each frame in the coordinate weighted calculation during positioning, that is, the voltage parameters of the four frames involved in the calculation are multiplied by their respective calibration coefficients in actual changes.
  • the second controller can apply the calibration coefficient in the alignment process, thereby reducing errors.
  • the transmitting coil is calibrated according to the voltage parameters, including:
  • the calibration coefficient of each coil frame in the transmitting end coil is calculated according to the average voltage parameter, and the calibration coefficient is the ratio of the average voltage parameter to the voltage parameter on each coil frame.
  • the calculated calibration coefficient can be directly applied to the calibration of each coil frame, thereby changing the weight of each frame in the coordinate calculation.
  • the second controller records the calibration coefficient, it also includes: labeling each coil frame on the transmitting end coil, and matching multiple calibration coefficients with the coil frames one by one, so that each coil frame has a unique corresponding label and calibration coefficient.
  • each coil frame After labeling each coil frame, it is convenient for the user to match the coil frame with its corresponding calibration coefficient, which is convenient for the second controller to record. At the same time, when used for aligning the transmitting end coil and the receiving end coil, the calibration coefficient and the coil frame can also be directly matched to facilitate the execution of the positioning action.
  • the voltage parameters on the transmitting coil are detected, including:
  • the calibration coil uses a coil array that corresponds one-to-one with the transmitting end coil, and the calibration coil can be turned on in a preset order.
  • the second controller records the corresponding coil frame voltage parameters and calculates the calibration coefficient, thereby avoiding repeated movement of the calibration coil.
  • the method further includes: converting the voltage parameter and the average voltage parameter into a detection value through a second controller, and calculating the calibration coefficient through the detection value.
  • the detection steps of the present invention are:
  • the first controller and the second controller are powered on and are in normal working state;
  • the first controller sends an excitation signal and an enable signal to the calibration coil, so that each coil frame is turned on in turn.
  • the second controller records the number of the turned-on coil frame 1, 2, 3...n at this time;
  • the second controller collects the voltage change and converts it into a detection value that is easy to compare.
  • the detection values M1, M2...Mn at this time are recorded and corresponded to the number of the turned-on frame;
  • the first controller stops sending the excitation signal
  • the final detection value is the original detection value multiplied by the calibration coefficient to complete the calibration.
  • the voltage parameter is the voltage change of the coil frame
  • the detection value can be the absolute value of the voltage change, which is convenient for comparison.
  • the average value of the detection value and the calibration coefficient satisfy:
  • the wireless charging positioning calibration method proposed in the present invention further includes a step of using a receiving end coil to detect the calibration coefficient, which includes:
  • the receiving end coil is moved to the top of the transmitting end coil frame in turn, the voltage parameters on the transmitting end coil are detected, and the position of the receiving end coil relative to the transmitting end coil is determined based on the voltage parameters. If the coordinate error of the receiving end coil above each transmitting end coil meets the requirements, the calibration is judged to be successful; if the error does not meet the requirements, it is considered that a fault has occurred and the positioning calibration device needs to be checked.
  • the wireless charging positioning and calibration method proposed in the present invention can eliminate the error caused by the different changes in the coil frame impedance during the alignment process, and can achieve more accurate alignment between the transmitting end and the receiving end, thereby improving the user experience and charging efficiency of the car owner.

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Abstract

The present invention discloses a wireless charging positioning calibration apparatus and calibration method. The wireless charging positioning calibration apparatus comprises a calibration coil that is arranged above a transmission end coil and is used for performing calibration for the transmission end coil; and same further comprises: a first controller, which is connected to the calibration coil and can provide an excitation signal for the calibration coil, causing the calibration coil to turn on; and a second controller, which is connected to the transmission end coil and is used for collecting voltage parameters on the transmission end coil and calculating a calibration coefficient for each coil spool in the transmission end coil according to the voltage parameters, so as to calibrate the transmission end coil. Compared to the prior art, the present invention enables more accurate alignment between the transmission end and a receiving end, and the use experience of vehicle owners and the charging efficiency are improved.

Description

一种无线充电定位校准装置及校准方法A wireless charging positioning calibration device and calibration method 技术领域Technical Field
本发明涉及车载***无线充电领域，特别是一种无线充电定位校准装置及校准方法。The present invention relates to the field of wireless charging of vehicle-mounted systems, and in particular to a wireless charging positioning calibration device and a calibration method.
背景技术Background technique
随着节能减排，以及控制大气污染的需求，新能源汽车(纯电动、混合动力汽车)正成为汽车行业的新主力军并高速发展，目前许多发达国家和所有著名的车企以及科研机构都在致力于推广和应用新能源汽车技术，作为新能源汽车发展产业链上的重要组成部分，相应的配对充电桩的需求也是井喷式的增长。With the demand for energy conservation, emission reduction and air pollution control, new energy vehicles (pure electric and hybrid vehicles) are becoming the new main force in the automotive industry and are developing rapidly. Currently, many developed countries and all well-known car companies and scientific research institutions are committed to promoting and applying new energy vehicle technology. As an important part of the new energy vehicle development industry chain, the demand for corresponding matching charging piles is also growing explosively.
无线传输是指无线充电，目前国内外知名车企、研究院、高校都在大力投入研发，无线充电分为三个部分：桩端、发射端、接收端。桩端部分先将工频交流电整流成高压直流电，再经逆变转换成高频交流电，最后通过线缆传输给发射端，桩端类似于充电桩；发射端即地端实际是由线圈和磁芯组成，通过高频交流电产生磁场，通过磁耦合向车端传输能量；接收端即车端集成了接收装置和变流装置，接收装置实际是由线圈和磁芯组成，从发射端接收到的能量通过变流装置转换成高压直流电，给新能源汽车高压电池充电，类似于车载充电机。Wireless transmission refers to wireless charging. Currently, well-known domestic and foreign automobile companies, research institutes, and universities are investing heavily in research and development. Wireless charging is divided into three parts: the pile end, the transmitter end, and the receiver end. The pile end first rectifies the industrial frequency AC into high-voltage DC, then converts it into high-frequency AC through an inverter, and finally transmits it to the transmitter end through a cable. The pile end is similar to a charging pile; the transmitter end, i.e. the ground end, is actually composed of a coil and a magnetic core. It generates a magnetic field through high-frequency AC and transmits energy to the vehicle end through magnetic coupling; the receiver end, i.e. the vehicle end, integrates a receiving device and a current conversion device. The receiving device is actually composed of a coil and a magnetic core. The energy received from the transmitter end is converted into high-voltage DC through a current conversion device to charge the high-voltage battery of a new energy vehicle, similar to an on-board charger.
在无线充电过程中，安装在地面或地下的发射端与安装在车辆上的接收端的对位情况，直接影响无线充电的功率传输效率，因此无线充电***必须具备使接收端与发射端精准对位的能力，目前通常在发射端与接收端安装定位线圈,利用谐振原理实现，然而由于实际的位置与谐振参数的差异，目前的技术无法良好的实现精准定位功能，不能准确的引导车主停车对位。During the wireless charging process, the alignment of the transmitter installed on the ground or underground and the receiver installed on the vehicle directly affects the power transmission efficiency of wireless charging. Therefore, the wireless charging system must have the ability to accurately align the receiver with the transmitter. Currently, positioning coils are usually installed on the transmitter and the receiver, and the resonance principle is used to achieve this. However, due to the difference between the actual position and the resonance parameters, the current technology cannot achieve a good precise positioning function and cannot accurately guide the car owner to park.
因此，如何设计一种无线充电定位校准装置及校准方法，能提高发射端与接收端的对位精度，是业界亟待解决的技术问题。Therefore, how to design a wireless charging positioning calibration device and calibration method to improve the alignment accuracy between the transmitter and the receiver is a technical problem that needs to be solved urgently in the industry.
发明内容Summary of the invention
针对现有技术中，无线充电***中发射端与接收端无法良好的实现定位功能的问题，本发明提出了一种无线充电定位校准装置及校准方法。In view of the problem in the prior art that a transmitter and a receiver in a wireless charging system cannot realize a good positioning function, the present invention proposes a wireless charging positioning calibration device and a calibration method.
本发明的技术方案为，提出了一种无线充电定位校准装置，包括一设于发射端线圈上方并用于对所述发射端线圈校准的校准线圈，还包括：The technical solution of the present invention is to propose a wireless charging positioning calibration device, including a calibration coil arranged above a transmitting end coil and used to calibrate the transmitting end coil, and also including:
第一控制器，其与所述校准线圈连接，并可为所述校准线圈提供激励信号，使所述校准线圈导通；A first controller is connected to the calibration coil and can provide an excitation signal to the calibration coil to make the calibration coil conductive;
第二控制器，其与所述发射端线圈连接，用于采集所述发射端线圈上的电压参数，并根据所述电压参数计算所述发射端线圈中每个线圈框的校准系数，以对所述发射端线圈校准。The second controller is connected to the transmitting end coil and is used to collect voltage parameters on the transmitting end coil and calculate the calibration coefficient of each coil frame in the transmitting end coil according to the voltage parameters to calibrate the transmitting end coil.
进一步，所述校准线圈为多线圈阵列，且所述校准线圈中的线圈框与所述发射端线圈中的线圈框一一匹配设置，所述校准线圈中线圈框的形状为圆形、三角形、方形中的一种。Furthermore, the calibration coil is a multi-coil array, and the coil frame in the calibration coil is matched with the coil frame in the transmitting end coil one by one, and the shape of the coil frame in the calibration coil is one of circular, triangular and square.
进一步，所述校准线圈安装于所述发射端线圈的上方20mm至300mm之间。Furthermore, the calibration coil is installed between 20 mm and 300 mm above the transmitting end coil.
本发明还提出了一种无线充电定位校准方法，包括：The present invention also proposes a wireless charging positioning calibration method, comprising:
将所述校准线圈置于所述发射端线圈的上方，并触发所述第一控制器，使所述校准线圈以特定频率导通；Placing the calibration coil above the transmitting end coil and triggering the first controller to make the calibration coil conduct at a specific frequency;
检测所述发射端线圈上每个线圈框的电压参数；Detecting the voltage parameters of each coil frame on the transmitting end coil;
根据所述电压参数对所述发射端线圈进行校准处理，使每个所述线圈框上的电压参数与其校准系数的积相同；Calibrate the transmitting end coil according to the voltage parameter so that the product of the voltage parameter on each coil frame and its calibration coefficient is the same;
通过第二控制器记录所述发射端线圈中每个线圈框的校准系数，并结束对所述发射端线圈的校准。The calibration coefficient of each coil frame in the transmitting end coil is recorded by the second controller, and the calibration of the transmitting end coil is completed.
进一步，根据所述电压参数对所述发射端线圈进行校准处理，包括：Further, the transmitting end coil is calibrated according to the voltage parameter, including:
计算所述发射端线圈上全部线圈框的平均电压参数；Calculating the average voltage parameters of all coil frames on the transmitting end coil;
根据所述平均电压参数计算所述发射端线圈中每个线圈框的校准系数，所述校准系数为所述平均电压参数对每个线圈框上电压参数的比值。The calibration coefficient of each coil frame in the transmitting end coil is calculated according to the average voltage parameter, and the calibration coefficient is the ratio of the average voltage parameter to the voltage parameter on each coil frame.
进一步，在所述第二控制器记录所述校准系数之前，还包括：对所述发射端线圈上每个线圈框进行标号，并将多个所述校准系数与所述线圈框一一匹配设置，使每个所述线圈框具有与之唯一对应的标号以及校准系数。Furthermore, before the second controller records the calibration coefficient, it also includes: labeling each coil frame on the transmitting end coil, and matching multiple calibration coefficients with the coil frames one by one, so that each coil frame has a unique corresponding label and calibration coefficient.
进一步，检测所述发射端线圈上的电压参数，包括：Further, detecting the voltage parameter on the transmitting end coil includes:
标定一发射端线圈中的线圈框，并移动所述校准线圈至被标定的线圈框上方,以特定频率导通校准线圈；Calibrate a coil frame in a transmitting end coil, move the calibration coil to above the calibrated coil frame, and conduct the calibration coil at a specific frequency;
检测并记录被标定的线圈框上的电压参数；Detect and record the voltage parameters on the calibrated coil frame;
依次标定所述发射端线圈中的线圈框，并重复检测动作，直至所述发射端线圈的所有线圈框均完成检测。The coil frames in the transmitting end coil are calibrated in sequence, and the detection action is repeated until all the coil frames of the transmitting end coil are detected.
进一步，在计算所述校准系数之前，还包括：通过第二控制器将所述电压参数和平均电压参数转换为检测值，所述校准系数通过所述检测值计算。Furthermore, before calculating the calibration coefficient, the method further includes: converting the voltage parameter and the average voltage parameter into a detection value through a second controller, and calculating the calibration coefficient through the detection value.
进一步，当对所述发射端线圈与接收端线圈校准时，所述无线充电定位校准方法还包括：Further, when calibrating the transmitting end coil and the receiving end coil, the wireless charging positioning calibration method further includes:
根据第二控制器所记录校准系数，对每个发射端线圈框进行校准修正，并将接收端线圈置于所述发射端线圈上方，以特定频率导通所述接收端线圈；Calibrate and correct each transmitting coil frame according to the calibration coefficient recorded by the second controller, place the receiving coil above the transmitting coil, and conduct the receiving coil at a specific frequency;
按预设顺序依次移动所述接收端线圈至发射端的线圈框上方，检测所述发射端线圈上的电压参数，并根据所述电压参数确定所述接收端线圈相对于发射端线圈的位置；Move the receiving end coil to above the transmitting end coil frame in a preset order, detect the voltage parameters on the transmitting end coil, and determine the position of the receiving end coil relative to the transmitting end coil according to the voltage parameters;
若误差处于预设误差范围，则判定校准通过。If the error is within the preset error range, the calibration is considered to be successful.
与现有技术相比，本发明至少具有如下有益效果：Compared with the prior art, the present invention has at least the following beneficial effects:
本发明提供了一种无线充电定位校准方法，能实现发射端与接收端更精准的对位，提升了车主的使用体验和充电效率。The present invention provides a wireless charging positioning calibration method, which can achieve more accurate alignment between a transmitting end and a receiving end, thereby improving the user experience and charging efficiency of the car owner.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
图1为发射端线圈靠近金属时的等效电路图；FIG1 is an equivalent circuit diagram when the transmitting coil is close to metal;
图2为本发明无线充电***的结构框图；FIG2 is a block diagram of a wireless charging system according to the present invention;
图3为本发明校准线圈上校准示意图；FIG3 is a schematic diagram of calibration on a calibration coil of the present invention;
图4为校准线圈的结构示意图；FIG4 is a schematic diagram of the structure of a calibration coil;
图5为本发明其他实施例中校准线圈的结构示意图；FIG5 is a schematic diagram of the structure of a calibration coil in another embodiment of the present invention;
图6为本发明又一优选实施例中校准线圈的结构示意图；FIG6 is a schematic structural diagram of a calibration coil in another preferred embodiment of the present invention;
图7为本发明校准过程时的工作流程图。FIG. 7 is a flowchart of the calibration process of the present invention.
具体实施方式Detailed ways
为了使本发明所要解决的技术问题、技术方案及有益效果更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
由此，本说明书中所指出的一个特征将用于说明本发明的一个实施方式的其中一个特征，而不是暗示本发明的每个实施方式必须具有所说明的特征。此外，应当注意的是本说明书描述了许多特征。尽管某些特征可以组合在一起以示出可能的***设计，但是这些特征也可用于其他的未明确说明的组合。由此，除非另有说明，所说明的组合并非旨在限制。Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.
下面结合附图以及实施例对本发明的原理及结构进行详细说明。The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.
在无线充电过程中，安装在地面或地下的发射端与安装在车辆上的接收端的对位情况，直接影响无线充电的功率传输效率，因此无线充电***必须具备使接收端与发射端精准对位的能力。本发明的思路在于，提出一种无线充电定位校准装置及校准方法，通过为发射端线圈中每个线圈框设置校准系数，在进行发射端和接收端的对位时，通过校准后的电压参数进行对位，避免了因各线圈框阻抗变化幅度不一致导致的计算坐标出现偏差的问题。During the wireless charging process, the alignment of the transmitter installed on the ground or underground and the receiver installed on the vehicle directly affects the power transmission efficiency of wireless charging. Therefore, the wireless charging system must have the ability to accurately align the receiver with the transmitter. The idea of the present invention is to propose a wireless charging positioning calibration device and calibration method. By setting a calibration coefficient for each coil frame in the transmitter coil, when aligning the transmitter and the receiver, the calibrated voltage parameters are used for alignment, avoiding the problem of deviation in the calculated coordinates caused by inconsistent impedance changes of each coil frame.
其中，无线充电***包括桩端、发射端、接收端，其通过桩端取电，并提供给发射端，发射端包括有发射端铝板、发射端磁芯以及发射端线圈，接收端包括接收端铝板、接收端磁芯以及接收端线圈。在发射端上电后，其发射端线圈会与接收端线圈相互磁耦合，从而在接收端线圈中产生感应电流，并为负载供电。接收端安装在车上，又称车端，其上产生的感应电流能够给车载***进行供电，从而实现车载***的无线充电功能。Among them, the wireless charging system includes a pile end, a transmitter end, and a receiver end. It takes power from the pile end and provides it to the transmitter end. The transmitter end includes a transmitter end aluminum plate, a transmitter end magnetic core, and a transmitter end coil. The receiver end includes a receiver end aluminum plate, a receiver end magnetic core, and a receiver end coil. After the transmitter end is powered on, its transmitter end coil will be magnetically coupled with the receiver end coil, thereby generating an induced current in the receiver end coil and supplying power to the load. The receiver end is installed on the vehicle, also known as the vehicle end. The induced current generated on it can power the vehicle-mounted system, thereby realizing the wireless charging function of the vehicle-mounted system.
为保证发射端与接收端之间的能量传输效率，需要保证发射端与接收端的对位精度，在进行发射端和接收端之间的对位时，发射端线圈由于接收端线圈的靠近，其阻抗会发生变化，此时发射端线圈可以等效为一个耦合的发射端线圈电感 与其上的等效电阻 。 In order to ensure the energy transmission efficiency between the transmitter and the receiver, it is necessary to ensure the alignment accuracy between the transmitter and the receiver. When aligning the transmitter and the receiver, the impedance of the transmitter coil will change due to the proximity of the receiver coil. At this time, the transmitter coil can be equivalent to a coupled transmitter coil inductance. The equivalent resistance on it .
请参见图1，发射端线圈可以表示为：Please refer to Figure 1, the transmitting coil can be expressed as:
即Right now
其中，w为接收端线圈中电流信号的角频率，M为互感系数，从上述公式中可以看出，接收端线圈靠近发射端线圈时等效感量会减小，等效电阻增大，现假设Among them, w is the angular frequency of the current signal in the receiving coil, and M is the mutual inductance coefficient. From the above formula, it can be seen that when the receiving coil is close to the transmitting coil, the equivalent inductance will decrease and the equivalent resistance will increase. Now assume that
    则线圈阻抗变化为Then the coil impedance changes to
在高频的影响下，电感对阻抗的影响大于电阻，因此，对于阻抗变化可以简化为：Under the influence of high frequency, the effect of inductance on impedance is greater than that of resistance. Therefore, the impedance change can be simplified to:
一般的异物，其对检测线圈的感量影响很小,难以检测，因此，必须引入谐振电路，以串联谐振为例，LOOP板上线圈阻抗变化为Generally, foreign matter has little effect on the inductance of the detection coil and is difficult to detect. Therefore, a resonant circuit must be introduced. Taking series resonance as an example, the impedance change of the coil on the LOOP board is
式中Qcoil为检测线圈的品质因数，可以看出，阻抗的变化量被放大，提升了检测灵敏度。Where Qcoil is the quality factor of the detection coil. It can be seen that the change in impedance is amplified, which improves the detection sensitivity.
由于发射端线圈中每个线圈框产生的阻抗变化量不同，因此在对位时会产生较大的误差，影响定位精度。Since the impedance variation produced by each coil frame in the transmitting coil is different, a large error will be generated during alignment, affecting the positioning accuracy.
传统的对位方式中，在进行发射端与接收端之间的对位时，是基于接收端线圈位于发射端每个单独线圈框正上方导通时引起对应线圈框的阻抗变化量相同，然后采集发射端线圈中每个线圈框的电压变化量，每个单独的发射端线圈对应不同的X轴，Y轴坐标，由于距接收端线圈越近的发射端线圈电压变化量越大，选取变化量最大的线圈框，认为接收端线圈距其最近，如图3所示，N0为电压变化量最大的线圈框，图3（a）对包括N0在内5框坐标进行加权计算，假设N0~N4坐标分别为(0，0)，(0，10)，(10，0)(0，-10)，(-10，0)，当接收端线圈位于N0正上方时，其N1~N4坐标相互抵消，最后接收端线圈坐标为(0，0)；In the traditional alignment method, when aligning the transmitter and the receiver, it is based on the fact that the impedance change of the corresponding coil frame is the same when the receiver coil is located directly above each individual coil frame of the transmitter and is turned on. Then, the voltage change of each coil frame in the transmitter coil is collected. Each individual transmitter coil corresponds to different X-axis and Y-axis coordinates. Since the closer the transmitter coil is to the receiver coil, the greater the voltage change, the coil frame with the largest change is selected, and it is considered that the receiver coil is closest to it. As shown in Figure 3, N0 is the coil frame with the largest voltage change. Figure 3 (a) performs weighted calculation on the coordinates of the five frames including N0. Assume that the coordinates of N0~N4 are (0, 0), (0, 10), (10, 0) (0, -10), (-10, 0) respectively. When the receiver coil is located directly above N0, its N1~N4 coordinates cancel each other out, and the final receiver coil coordinate is (0, 0).
当接收端线圈由原点(0，0)偏向y轴方向时，X轴方向的N4与N2坐标依旧相互抵消，Y轴方向N1电压变化量大于N3，即N1坐标占比权重大于N3,检测的接收端线圈坐标在Y轴会偏向N1；When the receiving coil deviates from the origin (0, 0) to the y-axis direction, the coordinates of N4 and N2 in the x-axis direction still cancel each other out, and the voltage change of N1 in the y-axis direction is greater than that of N3, that is, the weight of the N1 coordinate is greater than that of N3, and the detected coordinate of the receiving coil in the y-axis will deviate to N1;
当接收端线圈出现其他偏移情况时，原理相同，通过各框变化量来进行加权计算。When other offset conditions occur in the receiving coil, the principle is the same, and weighted calculation is performed through the changes in each frame.
进一步的，图3(b)对包括N0在内9框坐标进行加权计算，计算量大，但结果更为精确。Furthermore, FIG3(b) performs weighted calculation on the coordinates of the nine frames including N0, which requires large amount of calculation but the result is more accurate.
实际应用中，发射端线圈中每个线圈框的谐振频率，品质因数等参数不同，导致同样的接收端线圈位于发射端线圈正上方时，引起的阻抗变化量不同，即当接收端定位线圈位于N0正上方时，理想条件下，N0电压变化量最大，其周围框电压变化量小于N0且相等，而实际中各框阻抗变化量存在较大差异，进行加权计算时产生误差。In practical applications, the resonance frequency, quality factor and other parameters of each coil frame in the transmitting coil are different, resulting in different impedance changes when the same receiving coil is located directly above the transmitting coil. That is, when the receiving positioning coil is located directly above N0, under ideal conditions, the voltage change of N0 is the largest, and the voltage change of its surrounding frames is less than and equal to N0. However, in practice, there are large differences in the impedance changes of each frame, which causes errors in weighted calculation.
从而完成发射端线圈与接收端线圈的对位。Thereby completing the alignment of the transmitting end coil and the receiving end coil.
对此，本发明提出了一种无线充电定位校准装置，其包括一设于发射端线圈上方并用于对发射端线圈校准的校准线圈，以及：In this regard, the present invention proposes a wireless charging positioning calibration device, which includes a calibration coil disposed above the transmitting end coil and used to calibrate the transmitting end coil, and:
第一控制器，其与校准线圈连接，并可为校准线圈提供激励信号，使校准线圈导通；A first controller is connected to the calibration coil and can provide an excitation signal to the calibration coil to make the calibration coil conductive;
第二控制器，其与发射端线圈连接，用于采集发射端线圈上的电压参数，并根据电压参数计算发射端线圈中每个线圈框的校准系数，以对发射端线圈校准。The second controller is connected to the transmitting end coil and is used to collect voltage parameters on the transmitting end coil and calculate the calibration coefficient of each coil frame in the transmitting end coil according to the voltage parameters to calibrate the transmitting end coil.
其中，上述电压参数即电压变化量（发出激励信号前后的电压变化量），本发明的设计思路是，通过校准线圈模拟接收端线圈，使发射端线圈上的阻抗变化，再获取发射端线圈上每个线圈框的电压变化量（其可以用于反应阻抗变化量），并根据电压变化量计算出每个线圈框的校准系数，使得每个线圈框上的电压变化量与其校准系数的积相同，然后在对发射端线圈和接收端线圈进行对位时，应用该校准系数于每个发射端线圈的线圈框上，消除因为阻抗变化量不同而导致的误差，提高对位的准确性。Among them, the above-mentioned voltage parameter is the voltage change (the voltage change before and after the excitation signal is sent). The design idea of the present invention is to simulate the receiving end coil by the calibration coil to change the impedance on the transmitting end coil, and then obtain the voltage change of each coil frame on the transmitting end coil (which can be used to reflect the impedance change), and calculate the calibration coefficient of each coil frame according to the voltage change, so that the product of the voltage change on each coil frame and its calibration coefficient is the same, and then when the transmitting end coil and the receiving end coil are aligned, the calibration coefficient is applied to the coil frame of each transmitting end coil to eliminate the error caused by the different impedance changes and improve the accuracy of alignment.
请参见图4，其为本发明一实施方案中校准线圈阵列的平面视图，线圈呈方形绕制在其上，该校准线圈阵列与发射端线圈阵列相同，且每个线圈框与发射端中线圈框一一对应,通过调整谐振电容大小调整谐振频率，使校准线圈阵列在发射端引起的检测值变化与接收端相同，起到模拟接收端线圈的作用。在定位过程中，控制器通过内部地址线来选通定位线圈内部各个单独线圈框。Please refer to Figure 4, which is a plan view of the calibration coil array in one embodiment of the present invention, on which the coil is wound in a square shape. The calibration coil array is the same as the transmitting end coil array, and each coil frame corresponds to the coil frame in the transmitting end. The resonant frequency is adjusted by adjusting the resonant capacitor size, so that the detection value change caused by the calibration coil array at the transmitting end is the same as that at the receiving end, playing the role of simulating the receiving end coil. During the positioning process, the controller selects each individual coil frame inside the positioning coil through the internal address line.
请参见图5，校准线圈包括多个线圈框，且校准线圈中的线圈框与发射端线圈中的线圈框一一匹配设置，其校准线圈中线圈框的形状为圆形、三角形、方形中的一种。Please refer to FIG. 5 , the calibration coil includes a plurality of coil frames, and the coil frames in the calibration coil are matched with the coil frames in the transmitting end coil one by one, and the shape of the coil frames in the calibration coil is one of circular, triangular and square.
请参见图6，在本发明另一实施例中，还可以将校准线圈的面积增大，使校准线圈单独线圈框覆盖发射端线圈的四个独立线圈框，采取这样的方法可以同时校准四个线圈框的系数，缩短校准所需时间，具体覆盖框数可以根据实际进行调整，通常在1~8个之间。其中，校准线圈和接收端线圈可以绕制在PCB板上，或采用铜线绕制，以节约成本。Please refer to FIG6 . In another embodiment of the present invention, the area of the calibration coil can be enlarged so that the calibration coil single coil frame covers the four independent coil frames of the transmitting coil. This method can calibrate the coefficients of the four coil frames at the same time, shortening the calibration time. The specific number of covered frames can be adjusted according to actual conditions, usually between 1 and 8. The calibration coil and the receiving coil can be wound on a PCB board or with copper wire to save costs.
更进一步的，本发明中校准线圈安装于发射端线圈上方的20mm至300mm之间。Furthermore, in the present invention, the calibration coil is installed between 20 mm and 300 mm above the transmitting end coil.
请参见图7，基于本发明提出的无线充电定位校准装置，本发明还提出了一种无线充电定位校准方法，其包括：Referring to FIG. 7 , based on the wireless charging positioning calibration device proposed in the present invention, the present invention also proposes a wireless charging positioning calibration method, which includes:
将校准线圈置于发射端线圈的上方，并触发第一控制器，使所校准线圈导通；Placing the calibration coil above the transmitting end coil and triggering the first controller to turn on the calibration coil;
检测发射端线圈上每个线圈框的电压参数；Detecting the voltage parameters of each coil frame on the transmitting end coil;
根据电压参数对发射端线圈进行校准处理，使每个线圈框上的电压参数与其校准系数的积相同；Calibrate the transmitting coil according to the voltage parameter so that the voltage parameter on each coil frame is equal to the product of its calibration coefficient;
通过第二控制器记录发射端线圈中每个线圈框的校准系数，并结束对发射端线圈的校准。The calibration coefficient of each coil frame in the transmitting end coil is recorded by the second controller, and the calibration of the transmitting end coil is completed.
该定位校准方法中，校准线圈能够起到模拟接收端线圈的作用，通过第二控制器记录每个线圈框的校准系数后，在对接收端线圈进行对位时，能够直接采用该校准系数对每个线圈框进行校准，从而避免因阻抗变化量不同导致的误差。In this positioning calibration method, the calibration coil can simulate the receiving end coil. After the calibration coefficient of each coil frame is recorded by the second controller, the calibration coefficient can be directly used to calibrate each coil frame when aligning the receiving end coil, thereby avoiding errors caused by different impedance changes.
如发射端线圈包括四个线圈框，在进行定位校准时，每个线圈框其阻抗变化引起的电压参数变化分别为100mV、125mV、175mV、200mV，在进行校准时，能够获取到4个与之匹配的校准系数，分别为1.5、1.2、0.857、0.75，该校准系数修正了在定位时坐标加权计算各框的权重，即参与计算的4框电压参数在实际变化上分别乘了各自的校准系数，通过第二控制器记录每个校准系数后，在进行发射端线圈和接收端线圈的对位时，第二控制器能将该校准系数应用在对位过程中，减小了误差。For example, the transmitting coil includes four coil frames. When performing positioning calibration, the voltage parameter changes caused by the impedance change of each coil frame are 100mV, 125mV, 175mV, and 200mV, respectively. When performing calibration, four matching calibration coefficients can be obtained, which are 1.5, 1.2, 0.857, and 0.75, respectively. The calibration coefficient corrects the weight of each frame in the coordinate weighted calculation during positioning, that is, the voltage parameters of the four frames involved in the calculation are multiplied by their respective calibration coefficients in actual changes. After recording each calibration coefficient through the second controller, when aligning the transmitting coil and the receiving coil, the second controller can apply the calibration coefficient in the alignment process, thereby reducing errors.
其中，根据电压参数对发射端线圈进行校准处理，包括：The transmitting coil is calibrated according to the voltage parameters, including:
计算发射端线圈上全部线圈框的平均电压参数；Calculate the average voltage parameters of all coil frames on the transmitting coil;
根据平均电压参数计算发射端线圈中每个线圈框的校准系数，校准系数为平均电压参数对每个线圈框上电压参数的比值。The calibration coefficient of each coil frame in the transmitting end coil is calculated according to the average voltage parameter, and the calibration coefficient is the ratio of the average voltage parameter to the voltage parameter on each coil frame.
通过计算平均电压参数计算校准系数，能够使计算出的校准系数能直接应用于每个线圈框的校准，改变各框在坐标计算中的权重。By calculating the calibration coefficient by calculating the average voltage parameter, the calculated calibration coefficient can be directly applied to the calibration of each coil frame, thereby changing the weight of each frame in the coordinate calculation.
进一步的，在第二控制器记录校准系数之前，还包括：对发射端线圈上每个线圈框进行标号，并将多个校准系数与线圈框一一匹配设置，使每个线圈框具有与之唯一对应的标号以及校准系数。Furthermore, before the second controller records the calibration coefficient, it also includes: labeling each coil frame on the transmitting end coil, and matching multiple calibration coefficients with the coil frames one by one, so that each coil frame has a unique corresponding label and calibration coefficient.
对每个线圈框标号后，能便于用户将线圈框与其对应的校准系数匹配，便于第二控制器的记录，同时，在用于发射端线圈与接收端线圈的对位时，也能够直接匹配校准系数和线圈框，便于定位动作的执行。After labeling each coil frame, it is convenient for the user to match the coil frame with its corresponding calibration coefficient, which is convenient for the second controller to record. At the same time, when used for aligning the transmitting end coil and the receiving end coil, the calibration coefficient and the coil frame can also be directly matched to facilitate the execution of the positioning action.
进一步的，检测发射端线圈上的电压参数，包括：Further, the voltage parameters on the transmitting coil are detected, including:
标定一发射端线圈中的线圈框，并移动校准线圈至被标定的线圈框上方；calibrating a coil frame in a transmitting end coil, and moving the calibration coil to above the calibrated coil frame;
检测并记录被标定的线圈框上的电压参数；Detect and record the voltage parameters on the calibrated coil frame;
重新标定发射端线圈中的线圈框，并重复检测动作，直至发射端线圈的所有线圈框均完成检测。Recalibrate the coil frames in the transmitter coil and repeat the detection action until all coil frames of the transmitter coil are detected.
    进一步的，校准线圈使用与发射端线圈一一对应的线圈阵列，可以按预设顺序导通校准线圈，第二控制器记录对应线圈框电压参数并计算校准系数，避免了校准线圈重复移动。Furthermore, the calibration coil uses a coil array that corresponds one-to-one with the transmitting end coil, and the calibration coil can be turned on in a preset order. The second controller records the corresponding coil frame voltage parameters and calculates the calibration coefficient, thereby avoiding repeated movement of the calibration coil.
更进一步的，在计算校准系数之前，还包括：通过第二控制器将电压参数和平均电压参数转换为检测值，校准系数通过检测值计算。Furthermore, before calculating the calibration coefficient, the method further includes: converting the voltage parameter and the average voltage parameter into a detection value through a second controller, and calculating the calibration coefficient through the detection value.
通过将电压参数和平均电压参数转换为一种便于计算的检测值，能够更方便第二控制器对多个电压参数的数据进行处理，同时降低了第二控制器的计算量。By converting the voltage parameter and the average voltage parameter into a detection value that is easy to calculate, it is easier for the second controller to process the data of multiple voltage parameters, while reducing the amount of calculation of the second controller.
具体的，本发明的检测步骤为：Specifically, the detection steps of the present invention are:
1、第一控制器与第二控制器接通电源，处于正常工作状态；1. The first controller and the second controller are powered on and are in normal working state;
2、下发校准指令，第一控制器发送激励信号及使能信号至校准线圈，使每个线圈框依次导通，第二控制器记录此时导通线圈框编号1、2、3…n；2. Issue a calibration instruction. The first controller sends an excitation signal and an enable signal to the calibration coil, so that each coil frame is turned on in turn. The second controller records the number of the turned-on coil frame 1, 2, 3...n at this time;
3、每个线圈框导通时，发射端上对应线圈框电压变化，第二控制器采集电压变化量并转化为一种易于比较的检测值，记录此时检测值M1、M2…Mn将其与导通框编号对应；3. When each coil frame is turned on, the voltage of the corresponding coil frame on the transmitting end changes. The second controller collects the voltage change and converts it into a detection value that is easy to compare. The detection values M1, M2...Mn at this time are recorded and corresponded to the number of the turned-on frame;
4、所有线圈框轮流导通完毕后，第一控制器停止发送激励信号，第二控制器对所有检测值计算平均值Mave，并根据每个检测值与平均值的比例关系计算校准系数km(m=1、2、3…n)并保存，最终检测值为原始检测值乘校准系数校准完成。4. After all coil frames are turned on in turn, the first controller stops sending the excitation signal, and the second controller calculates the average value Mave of all detection values, and calculates the calibration coefficient km (m=1, 2, 3...n) according to the proportional relationship between each detection value and the average value and saves it. The final detection value is the original detection value multiplied by the calibration coefficient to complete the calibration.
其中，电压参数为线圈框的电压变化量，检测值可以为电压变化量的绝对值，其便于比较，其检测值的平均值，和校准系数满足：Among them, the voltage parameter is the voltage change of the coil frame, and the detection value can be the absolute value of the voltage change, which is convenient for comparison. The average value of the detection value and the calibration coefficient satisfy:
其中，k为校准系数。Where k is the calibration factor.
对此，本发明所提出的无线充电定位校准方法，还包括使用接收端线圈对校准系数进行检测的步骤，其包括：In this regard, the wireless charging positioning calibration method proposed in the present invention further includes a step of using a receiving end coil to detect the calibration coefficient, which includes:
根据第二控制器所记录校准系数，对每个发射端线圈框进行校准修正，并将接收端线圈置于所述发射端线圈上方，以特定频率导通所述接收端线圈；Calibrate and correct each transmitting coil frame according to the calibration coefficient recorded by the second controller, place the receiving coil above the transmitting coil, and conduct the receiving coil at a specific frequency;
按预设顺序，依次移动所述接收端线圈至发射端的线圈框上方，检测所述发射端线圈上的电压参数，并根据所述电压参数确定所述接收端线圈相对于发射端线圈的位置,若接收端线圈在每个发射端线圈上方坐标误差均满足要求，则判断校准通过；若误差不满足要求，则认为出现故障，需要对定位校准装置进行检查。In a preset order, the receiving end coil is moved to the top of the transmitting end coil frame in turn, the voltage parameters on the transmitting end coil are detected, and the position of the receiving end coil relative to the transmitting end coil is determined based on the voltage parameters. If the coordinate error of the receiving end coil above each transmitting end coil meets the requirements, the calibration is judged to be successful; if the error does not meet the requirements, it is considered that a fault has occurred and the positioning calibration device needs to be checked.
通过本发明所提出的无线充电定位校准方法，能够消除对位过程中因线圈框阻抗变化量不同导致的误差，能实现发射端与接收端更精准的对位，提升了车主的使用体验和充电效率。The wireless charging positioning and calibration method proposed in the present invention can eliminate the error caused by the different changes in the coil frame impedance during the alignment process, and can achieve more accurate alignment between the transmitting end and the receiving end, thereby improving the user experience and charging efficiency of the car owner.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所做的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (9)

  1. 一种无线充电定位校准装置，包括一设于发射端线圈上方并用于对所述发射端线圈校准的校准线圈，其特征在于，还包括：A wireless charging positioning calibration device, comprising a calibration coil disposed above a transmitting end coil and used to calibrate the transmitting end coil, characterized in that it also includes:
    第一控制器，其与所述校准线圈连接，并可为所述校准线圈提供激励信号，使所述校准线圈导通；A first controller is connected to the calibration coil and can provide an excitation signal to the calibration coil to make the calibration coil conductive;
    第二控制器，其与所述发射端线圈连接，用于采集所述发射端线圈上的电压参数，并根据所述电压参数计算所述发射端线圈中每个线圈框的校准系数，以对所述发射端线圈校准。The second controller is connected to the transmitting end coil and is used to collect voltage parameters on the transmitting end coil and calculate the calibration coefficient of each coil frame in the transmitting end coil according to the voltage parameters to calibrate the transmitting end coil.
  2. 根据权利要求1所述的无线充电定位校准装置，其特征在于，所述校准线圈为多线圈阵列，且所述校准线圈中的线圈框与所述发射端线圈中的线圈框一一匹配设置，所述校准线圈中线圈框的形状为圆形、三角形、方形中的一种。The wireless charging positioning calibration device according to claim 1 is characterized in that the calibration coil is a multi-coil array, and the coil frame in the calibration coil is matched one by one with the coil frame in the transmitting end coil, and the shape of the coil frame in the calibration coil is one of circular, triangular, and square.
  3. 根据权利要求1所述的无线充电定位校准装置，其特征在于，所述校准线圈安装于所述发射端线圈的上方20mm至300mm之间。The wireless charging positioning and calibration device according to claim 1 is characterized in that the calibration coil is installed between 20 mm and 300 mm above the transmitting end coil.
  4. 一种采用如权利要求1至3任一项所述的无线充电定位校准装置的无线充电定位校准方法，其特征在于，包括：A wireless charging positioning calibration method using the wireless charging positioning calibration device according to any one of claims 1 to 3, characterized in that it comprises:
    将所述校准线圈置于所述发射端线圈的上方，并触发所述第一控制器，使所述校准线圈以特定频率导通；Placing the calibration coil above the transmitting end coil and triggering the first controller to make the calibration coil conduct at a specific frequency;
    检测所述发射端线圈上每个线圈框的电压参数；Detecting the voltage parameters of each coil frame on the transmitting end coil;
    根据所述电压参数对所述发射端线圈进行校准处理，使每个所述线圈框上的电压参数与其校准系数的积相同；Calibrate the transmitting end coil according to the voltage parameter so that the product of the voltage parameter on each coil frame and its calibration coefficient is the same;
    通过第二控制器记录所述发射端线圈中每个线圈框的校准系数，并结束对所述发射端线圈的校准。The calibration coefficient of each coil frame in the transmitting end coil is recorded by the second controller, and the calibration of the transmitting end coil is completed.
  5. 根据权利要求4所述的无线充电定位校准方法，其特征在于，根据所述电压参数对所述发射端线圈进行校准处理，包括：The wireless charging positioning calibration method according to claim 4 is characterized in that the calibration process of the transmitting end coil is performed according to the voltage parameter, comprising:
    计算所述发射端线圈上全部线圈框的平均电压参数；Calculating the average voltage parameters of all coil frames on the transmitting end coil;
    根据所述平均电压参数计算所述发射端线圈中每个线圈框的校准系数，所述校准系数为所述平均电压参数对每个线圈框上电压参数的比值。The calibration coefficient of each coil frame in the transmitting end coil is calculated according to the average voltage parameter, and the calibration coefficient is the ratio of the average voltage parameter to the voltage parameter on each coil frame.
  6. 根据权利要求5所述的无线充电定位校准方法，其特征在于，在所述第二控制器记录所述校准系数之前，还包括：对所述发射端线圈上每个线圈框进行标号，并将多个所述校准系数与所述线圈框一一匹配设置，使每个所述线圈框具有与之唯一对应的标号以及校准系数。The wireless charging positioning calibration method according to claim 5 is characterized in that before the second controller records the calibration coefficient, it also includes: labeling each coil frame on the transmitting end coil, and matching multiple calibration coefficients with the coil frames one by one, so that each coil frame has a unique corresponding label and calibration coefficient.
  7. 根据权利要求4所述的无线充电定位校准方法，其特征在于，检测所述发射端线圈上的电压参数，包括：The wireless charging positioning calibration method according to claim 4 is characterized in that detecting the voltage parameter on the transmitting end coil comprises:
    标定一发射端线圈中的线圈框，并移动所述校准线圈至被标定的线圈框上方,以特定频率导通校准线圈；Calibrate a coil frame in a transmitting end coil, move the calibration coil to above the calibrated coil frame, and conduct the calibration coil at a specific frequency;
    检测并记录被标定的线圈框上的电压参数；Detect and record the voltage parameters on the calibrated coil frame;
    依次标定所述发射端线圈中的线圈框，并重复检测动作，直至所述发射端线圈的所有线圈框均完成检测。The coil frames in the transmitting end coil are calibrated in sequence, and the detection action is repeated until all the coil frames of the transmitting end coil are detected.
  8. 根据权利要求5所述的无线充电定位校准方法，其特征在于，在计算所述校准系数之前，还包括：通过第二控制器将所述电压参数和平均电压参数转换为检测值，所述校准系数通过所述检测值计算。The wireless charging positioning calibration method according to claim 5 is characterized in that before calculating the calibration coefficient, it also includes: converting the voltage parameter and the average voltage parameter into a detection value through a second controller, and the calibration coefficient is calculated through the detection value.
  9. 根据权利要求4所述的无线充电定位校准方法，其特征在于，当对所述发射端线圈与接收端线圈校准时，所述无线充电定位校准方法还包括：The wireless charging positioning calibration method according to claim 4 is characterized in that when calibrating the transmitting end coil and the receiving end coil, the wireless charging positioning calibration method further comprises:
    根据第二控制器所记录校准系数，对每个发射端线圈框进行校准修正，并将接收端线圈置于所述发射端线圈上方，以特定频率导通所述接收端线圈；Calibrate and correct each transmitting coil frame according to the calibration coefficient recorded by the second controller, place the receiving coil above the transmitting coil, and conduct the receiving coil at a specific frequency;
    按预设顺序依次移动所述接收端线圈至发射端的线圈框上方，检测所述发射端线圈上的电压参数，并根据所述电压参数确定所述接收端线圈相对于发射端线圈的位置；Move the receiving end coil to above the transmitting end coil frame in a preset order, detect the voltage parameters on the transmitting end coil, and determine the position of the receiving end coil relative to the transmitting end coil according to the voltage parameters;
    若误差处于预设误差范围，则判定校准通过。If the error is within the preset error range, the calibration is considered to be successful.
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Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN115912686A (en) * 2022-11-30 2023-04-04 深圳威迈斯新能源股份有限公司 Wireless charging positioning calibration device and calibration method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106936225A (en) * 2015-12-31 2017-07-07 中惠创智无线供电技术有限公司 A kind of alignment system and its method for electric automobile wireless charging
EP3373412A1 (en) * 2017-03-07 2018-09-12 Powermat Technologies Ltd. System for wireless power charging
CN112721668A (en) * 2020-12-29 2021-04-30 哈尔滨宇龙自动化有限公司 Position self-alignment device of dynamic wireless charging system and charging control method thereof
CN113517764A (en) * 2021-09-13 2021-10-19 江苏鑫康微电子科技有限公司 Wireless charging system for real-time calibration of resonant frequency of transmitting terminal
CN115508912A (en) * 2022-09-26 2022-12-23 深圳威迈斯新能源股份有限公司 Wireless charging auxiliary calibration test device and test method
CN115912686A (en) * 2022-11-30 2023-04-04 深圳威迈斯新能源股份有限公司 Wireless charging positioning calibration device and calibration method
CN116165617A (en) * 2023-02-22 2023-05-26 深圳威迈斯新能源股份有限公司 Wireless charging positioning calibration system and positioning calibration method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106936225A (en) * 2015-12-31 2017-07-07 中惠创智无线供电技术有限公司 A kind of alignment system and its method for electric automobile wireless charging
EP3373412A1 (en) * 2017-03-07 2018-09-12 Powermat Technologies Ltd. System for wireless power charging
CN112721668A (en) * 2020-12-29 2021-04-30 哈尔滨宇龙自动化有限公司 Position self-alignment device of dynamic wireless charging system and charging control method thereof
CN113517764A (en) * 2021-09-13 2021-10-19 江苏鑫康微电子科技有限公司 Wireless charging system for real-time calibration of resonant frequency of transmitting terminal
CN115508912A (en) * 2022-09-26 2022-12-23 深圳威迈斯新能源股份有限公司 Wireless charging auxiliary calibration test device and test method
CN115912686A (en) * 2022-11-30 2023-04-04 深圳威迈斯新能源股份有限公司 Wireless charging positioning calibration device and calibration method
CN116165617A (en) * 2023-02-22 2023-05-26 深圳威迈斯新能源股份有限公司 Wireless charging positioning calibration system and positioning calibration method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WU, YINGKAI ET AL.: "Design of Magnetic Resonance Wireless Charging System Based on Efficiency Self-Calibration", ELECTRONIC TECHNOLOGY & SOFTWARE ENGINEERING, no. 13, 1 July 2016 (2016-07-01), pages 130 - 132, ISSN: 2095-5650 *

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