CN113572276A - System and method for wireless charging alignment and information transmission based on coil structure - Google Patents
System and method for wireless charging alignment and information transmission based on coil structure Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract
The invention belongs to the technical field of wireless power supply, and particularly relates to a system and a method for performing wireless charging alignment and information transmission based on a coil structure. The surface of a receiving coil is made into a structure with a plurality of stand columns, the receiving coil is installed on receiving end equipment, a laser scanning range radar is installed on a transmitting coil, the stand columns on the receiving coil are all installed facing the laser scanning range radar, equipment to be charged with the receiving equipment enters a charging area, the receiving coil on the receiving equipment is matched with the transmitting coil of power generation equipment through stand column information on the receiving coil, and alignment and information transmission are achieved; the method comprises the steps that a laser scanning ranging radar on a transmitting device detects coded information formed by stand column information on a receiving coil, namely the stand column information, and the identity of the receiving coil, namely a unique coded address or unique identity information, is obtained; the transmitting equipment can actively call the receiving equipment, establish connection with the receiving equipment and carry out mutual data transmission.
Description
Technical Field
The invention belongs to the technical field of wireless power supply, and particularly relates to a system and a method for performing wireless charging alignment and information transmission based on a coil structure.
Background
With the rise and development of the wireless power supply industry, wireless power supply is being recognized and provides much convenience, and more particularly, the wireless power supply industry enters the living field from industrial use.
However, at present, wireless power supply has some problems, such as debugging, overhauling and using of surface cables, and power transmitting cables belong to cables which are erected in a suspended way, and are similar to power supply systems in cities. When the time is increased, the cable between the two brackets can droop due to the gravity, which has the influence on debugging, overhauling and use.
When the product is debugged or maintained, when the equipment runs and moves on the device, such as a power pick-up device, debugging or maintenance personnel need to move along with the equipment below; and to carefully listen with the ear, if a hissing sound is made, indicating that the power transmitting cable rubs against the power pick-up device, the cable needs to be adjusted. Such a commissioning or maintenance is highly inefficient, as it is known manually to distinguish the equipment situation from the sound. And sometimes, the factory environment is noisy, and the fizzing sound cannot be heard at all, so that interference is formed, and certain difficulty is brought to overhaul.
Furthermore, cable deformation is a slow process that is difficult to find without careful inspection, but it is late when the cable begins to wear and deform. Sometimes the power pick-up equipment may be scratched, resulting in equipment damage. Therefore, the track state can be preferably detected in real time, a dangerous seedling head appears, and the alarm is given immediately to prevent accidents.
Disclosure of Invention
Aiming at the problems brought by cable deformation to debugging or maintenance in the prior art, the invention provides a method and a system for wireless charging alignment and information transmission based on a coil structure.
In order to realize the purpose, the invention is realized by the following technical scheme:
the invention provides a system for wireless charging alignment and information transmission based on a coil structure, which is characterized in that:
a plurality of columns arranged in an m x n matrix are arranged on the receiving coil, the heights of the columns in the m x n matrix are the same, the widths of the columns are the same, and the lengths of the columns are different;
in the column direction, the lengths of a plurality of columns in the ith column are gradually increased from the 1 st row to the mth row, wherein m is greater than or equal to 2 and is an integer, the lengths of a plurality of columns in other columns except the ith column are the same, i is greater than or equal to 1 and is less than or equal to n, n is greater than or equal to 2, i and n are integers, the lengths of the columns in the 1 st column to the nth column are different, and the distances between adjacent columns are different;
in the row direction, the distance between adjacent rows is the same, the length of the upright column positioned in the ith column in each row of upright columns is different, and the lengths of the upright columns in each row of upright columns are different.
Further, receiving coil installs on receiving end equipment, and the one side that is provided with a plurality of stands on the receiving coil is located transmitting coil directly over, installs laser scanning range radar on the transmitting coil, and the stand on the receiving coil all installs towards laser scanning range radar, and laser scanning range radar acquires stand information on the receiving coil.
Further, the column information on the receiving coil comprises a data head, line number information, self-coding of the receiving coil and a data tail;
the data head is the beginning of a certain row of column information, the length of the data head accounts for 10% of the position of the whole row of information, wherein 5% of the data head comprises the length of the column, and the rest 5% is the length without the column;
the line number information is formed by 5-bit column width, wherein the first 4-bit information consists of binary codes, the maximum is 16, and the width of the last column is the stop bit of the line number information;
the self code of the receiving coil is information representing the unique identity of the receiving terminal equipment and is used for pairing of the whole wireless charging system, the self code of the receiving coil is composed of 8 bits of data, each bit of data occupies the length of 3 upright posts, wherein an upright post is arranged on the length of a first upright post, and whether the upright post is contained or not is determined on the length of a second upright post according to the data; if the bit is 1, there is a column; if the bit is 0, there is no pillar here; the third upright column has no upright column in length and is used as a stop symbol;
the data tail represents the end of this line of information, starting from the end of the encoding of the last receiving coil itself, which information contains all the uprights.
Further, in each line of information, the line number information and the code of the transmitting coil are repeatedly cycled until the complete cycle can not be placed and ended.
Further, the name or number of each row is defined by row number information depending on the column of the ith column in the row.
The invention provides a method for wireless charging alignment and information transmission based on a coil structure, which is characterized in that:
the equipment to be charged with the receiving equipment enters a charging area, and a receiving coil on the receiving equipment is matched with a transmitting coil of the power generation equipment through stand column information on the receiving coil, so that alignment and information transmission are realized;
the method comprises the steps that a laser scanning ranging radar on a transmitting device detects coded information formed by stand column information on a receiving coil, namely the stand column information, and the identity of the receiving coil, namely a unique coded address or unique identity information, is obtained;
the transmitting equipment can actively call the receiving equipment, establish connection with the receiving equipment and carry out mutual data transmission.
Further, the alignment of the transmitting coil and the receiving coil is specifically as follows:
after the laser scanning range radar obtains the information of the upright column, analyzing a data head and a data tail, wherein the end of the data head is one boundary of a receiving coil, the end of the data tail is the other boundary of the receiving coil, acquiring the length of the whole receiving coil, and converting the receiving coil into a straight line with a fixed length to form a detection straight line;
and the standard straight line of the receiving coil is a straight line which is fitted by the laser scanning range radar after the receiving coil is detected under the condition that the receiving coil and the transmitting coil are aligned, and whether the receiving coil of the equipment to be charged is aligned with the transmitting coil of the power generation equipment is judged according to the position state of the detecting straight line and the standard straight line.
Further, if the detection straight line is gradually close to the standard straight line and the detection straight line and the standard straight line are overlapped, the receiving coil is aligned to the transmitting coil;
if the detection straight line gradually approaches the standard straight line and deviates, the receiving coil is not aligned with the transmitting coil.
Further, the offset of the receiving coil is judged by utilizing the line number information,
when the laser scanning ranging radar scans a certain line, the line number of the line can be decoded, the line numbers are arranged in sequence, and the moving distance of the receiving coil is obtained according to the line number and the position of the line number of the last line.
Compared with the prior art, the invention has the advantages that:
the cable position can be detected in real time, accidents caused by emergency are prevented from further worsening, for example, after the cable is detected to droop, automatic stop processing is immediately carried out, and further loss is prevented.
The debugging is convenient, the operator needs to follow the equipment to judge the fault point by listening to the sound and looking at the position, and the system of the invention can judge the fault point only by automatically running for one week.
The maintenance is convenient, the fault position point is detected, the data is uploaded, and the accurate positioning can be realized. The maintenance personnel directly maintain the track without walking the whole track from beginning to end, thereby wasting time and labor and easily omitting fault points.
The equipment can be operated independently, is provided with an alarm, can not be matched with a third-party system, and improves the use flexibility of the equipment.
Drawings
Fig. 1 is a schematic structural diagram of a receiving coil in the prior art.
Fig. 2 is a schematic structural diagram of a receiving coil according to the present application.
Fig. 3 is a schematic diagram of a state of the device to be charged just entering the alignment state according to the present application.
Fig. 4 is a schematic diagram of a state where the to-be-charged device completes the alignment state according to the present application.
Fig. 5 is a schematic diagram of a laser scanning path in an alignment state of a receiving coil and a transmitting coil according to the present application.
Fig. 6 is a partially enlarged view of fig. 5 of the present application.
Fig. 7 is a schematic diagram of pillar encoded information on a receiving coil according to the present application.
Fig. 8 shows the relative positions of two straight lines when the automobile is just in the alignment state in the embodiment.
FIG. 9 shows the relative positions of two straight lines in the embodiment where the vehicle enters the garage and the lateral shift occurs.
Fig. 10 shows the relative positions of two straight lines in an embodiment in which the car is driven askew relative to the transmitter coil.
FIG. 11 is a schematic diagram illustrating the detection of longitudinal displacement of the vehicle in the embodiment.
Description of the labeling: 1. receiving coil, 2, output line, 3, the 1 st row of columns, 4, the m-th row of columns, 5, the 1 st column of columns, 6, the i-th row of columns, 7, the n-th row of columns, 8, receiving equipment, 9, battery, 10, transmitting coil, 11, transmitting equipment, 12, laser scanning ranging radar, 13, scanned laser beam, 14, columns, 15, scanned laser track, 16, equipment to be charged, 17, data head, 18, row number information, 19, receiving coil self-coding, 20, repeated cycle row number information and receiving coil self-coding information, 21, data tail, 22, standard straight line, 23, detection straight line.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Example 1
The embodiment mainly comprises two parts: the first is the receiving coil which is transformed, and the second is the laser scanning range radar.
As shown in fig. 1, a general wireless power receiving coil has a flat block structure with a smooth surface, but in this embodiment, in order to achieve the effects of alignment and information transmission, the surface of the wireless power receiving coil in the prior art is made into a structure with a plurality of columns, as shown in fig. 2.
In this embodiment, with reference to fig. 2, the direction facing right is the length direction, the direction perpendicular to the coil body is the height direction, and the direction perpendicular to both the length and the height is the width direction. The columns are arranged according to a certain rule, specifically, the columns are classified according to rows and columns to form a plurality of columns which are arranged in an m-n matrix, and m and n are integers which are more than or equal to 1.
For convenience of explanation, in fig. 2, the longitudinal direction facing each other is a row, and from front to back, the row 1 and the row 2 … … are m-th rows, and the direction perpendicular to the longitudinal direction is a column, and from left to right, the column 1 and the column 2 … … are n-th columns.
The distance between two adjacent columns is not uniform in the column direction, but varies depending on the coding. In the embodiment, one column is designed separately and used for indicating the row number information, for example, the 2 nd column is designed separately, in the 2 nd column of the separate design, the length of each column is different, the lengths of the columns from the column in the 1 st row to the column in the m th row increase sequentially, and the column in the 1 st row has the shortest length and the column in the m th row has the longest length. In the remaining other columns, all the columns in the column have the same length, that is, in this embodiment, except for the column 2, the column 1, the column 3 … …, the column n, all the columns have the same length, but the column lengths in different columns are different from each other, see fig. 2 in particular.
In the row direction, the spacing between adjacent rows is the same, and the width and height of all the pillars in each row are also the same. The name or number of each row is defined by "row number information", that is, defined according to column 2, and each row has uniqueness without conflicting with other rows. For example, in fig. 2, the column length of the "row number information" in the first row is shorter, that is, the column length of the "row number information" in the 1 st row is shorter, and the column length of the "row number information" in the last row is longer, that is, the column length of the "row number information" in the m-th row is longer.
In the practical application of system, wireless power supply receiving coil can be installed on treating the battery charging outfit in reverse, and all stands face transmitting coil promptly, and laser scanning range radar is located transmitting coil, therefore all stands all face laser scanning range radar.
Laser scanning range radar to in this embodiment belongs to the scanning formula sensor that adopts non-contact laser range finding technique, can acquire the high accuracy profile information of place environment in real time, is the essential core sensor in fields such as robot location navigation, space environment survey and drawing, security protection, and its principle is driven the carousel by the motor, has placed laser emitter and receiver on the rotatory carousel. The laser transmitter uses a narrow laser beam as a signal source and emits the narrow laser beam outwards. When the section of point-like pulse laser hits a wall surface, trees and a road, scattering is caused, and a part of light wave is reflected to a receiver of the laser radar. And calculating according to the laser ranging principle to obtain the distance from the emitter to the target. With the rotation of the turntable, the equipment can connect the point-shaped laser into a line segment, and measure the distance between the whole line segment and the laser transmitter, so that the laser scanning range radar of the type can only scan one line segment and give a two-dimensional scanning result but cannot give three-dimensional data. The laser scanning ranging radar and the laser ranging principle are the prior art, and the mechanical structure, the circuit structure and the software ranging algorithm of the laser scanning ranging radar and the laser ranging principle belong to mature products, so that the laser scanning ranging radar and the laser ranging algorithm are not developed here, can refer to products of Silan technology of domestic manufacturers for understanding, and are not described in detail.
In this embodiment, the laser scanning range radar is directed at a row of columns on the wireless power receiving coil. The distance, offset of the receiver coil relative to the radar can be obtained and the laser scanning range radar can be informed of the encoded information represented by the row of columns.
As shown in fig. 3 and 4, an automobile is taken as an example of the device to be charged for explanation. Fig. 3 shows the position of the laser radar scanning when the automobile is just in the alignment state, and fig. 4 shows the position of the laser radar scanning when the automobile is completely aligned.
As shown in figure 3, when the automobile is just in the alignment state, the laser scanning track of the laser scanning range radar arranged beside the transmitting coil is aimed at the 1 st column 3 in the receiving coil. As shown in fig. 4, after the alignment of the car is completed, the laser scanning track of the laser scanning range radar is aimed at the last 1 row of columns in the receiving coil, that is, the m-th row of columns 4.
Fig. 5 is an enlarged view showing the relative positions and interactions between the lidar, the transmit coil, the receive coil, the path of the laser scanning track, and the row 1 column 3.
When the laser scanning range radar scans a column in row 1, a specific range datum, such as 1 meter, is identified. There is no pillar between adjacent pillar spacings, and when no pillar is scanned, there is no specific distance data, or the distance data is larger.
Therefore, the laser scanning range radar can judge whether an upright post is scanned or not by scanning the distance data of the encountered obstacles, and the length of the upright post is calculated according to the length of the distance data. The basic function of the laser scanning range radar is consistent with the existing robot navigation, and the calculation of the distance and the length are the prior art of the laser scanning range radar detection, and the detailed description is not needed.
For simplicity of illustration, fig. 5 is shown in greater detail at a partial magnification and illustrates how the receiver coil transmits its own information to the lidar.
As shown in fig. 6, after the laser scanning range radar identifies each column, the column sequence of the whole coil is restored by using its own algorithm. The laser scanning distance measuring radar transmits a laser beam to judge whether an upright post is arranged on a receiving coil or not, the laser radar transmits the laser beam, the judgment is started from the 1 st upright post of the line, when the upright post blocks the laser beam, a relatively close distance data is generated, when the upright post does not block the laser beam, the laser beam emits to a far place, no specific distance data is given, or the given distance data is larger, the laser beam sequentially scans the 1 st to the nth upright posts of the line, and the information of all the upright posts on the line is obtained.
The column information of other rows is also obtained in this way, and the information of all columns on the receiving coil is obtained by the laser scanning range radar.
Therefore, the laser scanning range radar is equivalent to indirectly acquiring the information of the stand column on the receiving coil, and the significance of the stand column information on the receiving coil can be restored only by acquiring insufficient stand column information and decoding the stand column information.
The received column information on the receiver coil is divided into four types, i.e., a data header 17, line number information 18, a receiver coil self-encoding 19, and a data trailer 21, and the description is given separately.
The header 17 is the beginning of the current line of information, the header length is 10% of the entire line of information, and 5% of the header is the length of the contained pillar, as shown at a 1; the remaining 5% is the non-pillar length as shown at a 2.
The line number information 18 informs the laser scanning range radar that the column in the row number is scanned. The row number information is formed by the width of a 5-bit upright column, wherein the first 4 bits of information are formed by binary codes, and the maximum binary code of 16 is 10000, and 16 is the maximum; the last column width is the stop bit of the row number information, as shown in the row number information in fig. 7, which includes a 5-bit column width, as shown in b1, the position with column is 1, the position without column is 0, the front 4 bits of the row number information are 1011, 1011 is binary, and the line number information is converted into decimal 11, i.e. 11 th row; as shown in b2, the row number information stop bit has no stud here.
The information of the receiving coil self-encoding 19 is information representing the unique identity of the receiving end device, and is used for pairing of the whole wireless charging system. After the transmitting device acquires the information through the laser scanning range radar, the receiving devices which need to be charged can be known, and then communication is directly initiated, connection is established, and charging can be carried out. The self-coding of the receiving coil is composed of 8 bit data, each bit data occupies the width of 3 columns, the first width contains the columns, the second width really represents the data, and the third width has no columns and is used as a stop sign.
Wherein, a column is required to be placed on the width of the first column, and whether the second column contains the column is determined according to the data. If the bit is 1, there is a column; if the bit is 0, there is no pillar here. The third column has no column in width and is used as a stop symbol. As shown in c2 of fig. 7, the overall data is 10100111; as shown in c1 in fig. 7, according to that the width of each 3 columns in fig. 7 is 1 group, and 8 groups are counted, the width of each column is consistent with the width of the column in the row number information, and the grouping is marked by a vertical dotted line, so that the 2 nd width of the 1 st group of 3 column widths has a column, and is marked as 1; the 2 nd width of the 2 nd group of 3 stand column widths is marked as 0 if no stand column exists; the 2 nd width of the 3 rd group of 3 upright columns is provided with an upright column and is marked as 1; the 2 nd width of the 4 th group of 3 upright columns is marked as 0 if no upright column exists; the 2 nd width of the 5 th group of 3 upright columns is marked as 0 if no upright column exists; the 2 nd width of the 6 th group of 3 upright columns is marked as 1; the 2 nd width of the 7 th group of 3 upright columns is provided with an upright column, and the width is marked as 1; the 2 nd width of the 8 th group of 3 upright columns is marked as 1; constituting a data trailer 10100111.
The information of the data tail represents the end of the line of information, which is started after the last receiving coil finishes encoding itself, the information all contains the pillar, as shown in d in fig. 7, and all the rest positions contain the pillar as the data tail.
In order to prevent collisions, sludge and the like from damaging the integrity of the information, the information of each line needs to be ensured redundantly. In each line of information, the line number information 18 and the transmitting coil self-encoding information 19 are repeatedly cycled until the end of a complete cycle can not be placed, the repeatedly cycled line number information and the receiving coil self-encoding information 20 in fig. 7 are a repeated cycle, namely c3 in fig. 7, and the above detailed description of the encoding information can refer to fig. 7.
So far, the receiving device sends its own coded information to the transmitting device through the appearance structure of the receiving coil, and the transmitting device knows the object to be connected.
The embodiment only elaborates the implementation process of the scheme, and highlights that the receiving coil can send information to the outside through an appearance structure, which is also a main appeal and protection body finally proposed by the invention, but not for defining the specific details of the scheme. All the above specific parameters, such as height, width, length, sequence, spacing, data format, data type, data bit number, etc., of the columns, vary according to the actual field environment, implementation effect, equipment resolution, processing and cost, etc. Variations of these details are within the spirit of the invention and are within the scope of the invention.
The wireless power supply device is connected as follows, in this embodiment, an automobile with receiving devices or a device with an AGV is used as a device to be charged:
firstly, the automobile or AGV equipment with the receiving equipment enters a charging area, and the wireless communication module on the equipment can automatically join a public network segment. At this time, since a plurality of transmitting devices and a plurality of receiving devices are in the common network segment, they are separated from each other and are not paired.
When the automobile drives into one of the charging piles, the charging pile is the transmitting device, the laser scanning ranging radar detects the coded information formed by the stand columns on the receiving coil, namely the stand column information, the identity of the receiving coil is known, namely the unique coded address or the unique identity information is 10100111.
At this time, the transmitting device will actively call the receiving device in the public network and establish a connection with the receiving device. Then, the channel skipping is started, so that the interference is avoided, and the data are independently, safely and quickly transmitted mutually. The fixed information such as the unique coded address and the like transmitted by the upright post of the receiving coil is simple, and the real-time changing dynamic information is transmitted to the laser radar when the vehicle is charged and aligned.
The overall principle of the alignment of the transmitting coil and the receiving coil is as follows:
after the laser scanning range radar obtains the information of the upright column, the data head and the data tail are analyzed. The end of the data header is actually one boundary of the receiver coil, and the end of the data trailer is actually the other boundary of the receiver coil. So far the length of the whole receiving coil is known. In fact, if only the data header is known, the length of one receiving coil can be calculated, because the length of the data header is 10% of the length of the whole receiving coil according to the above standard. Then, after sorting and operation, the receiving coil can be simplified into a straight line with a fixed length, which is referred to as the detection straight line 23.
In the laboratory, the receiving coil and the transmitting coil are pre-aligned, and the lidar is placed at a proper position as a standard for system alignment, and a straight line, which is fitted by the lidar passing through the detecting receiving coil at this time, is defined as a standard straight line 22. Typically, the scanned position of the "standard straight line" is the last row of columns of the receiving coil, and the data of the "standard straight line" has been solidified into the transmitting device in advance.
It can be seen that, in practical applications, the alignment process of the transmitting coil and the receiving coil is exactly the process of overlapping the "detection line" and the "standard line". When the driver slowly drives the car close to the transmitting coil, the 'detection straight line' gradually approaches to the 'standard straight line'. When the two overlap, it is indicated that the driver has aligned the receiver coil with the transmitter coil.
Fig. 8 illustrates the relative positions of two straight lines when the vehicle is just in the aligned state.
When the vehicle is shifted when entering the garage, the "detection straight line" will also be displaced, and if the displacement is only in the transverse direction, i.e. perpendicular to the driving direction of the vehicle, the displacement diagram is shown in fig. 9.
Assuming that the driver steers the car skew with respect to the transmitter coil, the simplified effect is as shown in fig. 10.
The above are the cases of lateral displacement and skew, and also the case of longitudinal displacement, i.e. the position in the direction of travel of the car, this detection means uses the previously mentioned "row number information".
In each row, one place is different, namely the row number. Then the line number of the line is decoded when the laser scanning ranging radar scans the line. The row numbers are arranged in order and are not repeated. And performing reverse thrust by using the line number to obtain the position of the line number of the last line, and further indirectly obtaining how far the receiving coil has moved.
Illustrated below, with reference to fig. 11: assuming that the lidar scans a row of data, the row number of the row of data is 5, such as the position of a in fig. 11, i.e. the position of the column with row number 5. And the total number of bits of the row number is 4 bits, i.e. at most 16 row numbers. The 16 rows correspond to 16 equal divisions on the receiver coil, as shown in fig. 11 where B is the column row with row number 1 and C is the column row with row number 16. The 5/16 position where the laser beam strikes the receiving coil can be calculated from the above data. Assuming that the total width of the receiving coil is 50cm, it can be deduced that the laser beam is now applied to the position of 15.625cm of the whole receiving coil, e.g. the position E in fig. 11, and the position of the column row with row number 1 is deduced, and the distance between the position and the detection line is 15.625cm, i.e. the driver drives the car and moves the receiving coil to the transmitting coil by 15.625cm in the longitudinal direction. Then correspondingly, the position of the last row should be 34.375cm away from the position of the laser scanning range radar, such as the position F in fig. 11, and the position of the column row with the row number of 16 is calculated, and is located 34.375cm away from the detection straight line.
When the laser scanning ranging radar detects the upright column row with the row number of 16 and reaches the standard straight line, and the fitted detection straight line has no conditions of deviation, deflection and the like, the automobile alignment success can be judged, and a driver or an AGV is prompted to stop.
In conclusion, all the alignment information, including the detection straight line information, the standard straight line information, the offset information, the skew information, etc., can be informed to the vehicle-mounted display screen through the receiving device which has established connection to be displayed. The information can prompt a driver to twist a steering wheel, control the speed of the vehicle and adjust the angle in time, so that the vehicle can be aligned with the transmitting equipment more.
Therefore, the method is completed through an alignment and information transmission scheme which is formed by the receiving coil and the laser scanning range radar.
The invention adds two groups of laser beams or small-angle infrared rays and the like on the power pickup equipment, and specific description is not needed, as long as the core meaning of the invention can be achieved. On the opposite side of the laser beam, a receiving element is placed, which is not specifically described, and either a photoresistor a photodiode or a special laser detection element can be used, which can achieve the core meaning of the application. During the movement of the power pick-up device, the power transmission cable should always be within the half-aperture enclosed by the laser beam. If the cable sags or laterally shifts, the laser beam light path can be blocked, so that the receiving element cannot receive laser irradiation and presents an opposite state, namely an on state or a blocking state. This condition is processed by subsequent circuitry and an alarm may be raised. Even after data communication is carried out between the system and a third-party system, the specific fault point position is indicated, and maintenance personnel are guided to directly maintain. Without having to follow the track from end to end. The scheme can also detect the line problem in real time during the operation of the system, thereby maximally reducing the fault risk.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain a separate embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. System based on coil structure carries out wireless counterpoint and information transfer that charges, its characterized in that:
a plurality of columns arranged in an m x n matrix are arranged on the receiving coil, the heights of the columns in the m x n matrix are the same, the widths of the columns are the same, and the lengths of the columns are different;
in the column direction, the lengths of a plurality of columns in the ith column are gradually increased from the 1 st row to the mth row, wherein m is greater than or equal to 2 and is an integer, the lengths of a plurality of columns in other columns except the ith column are the same, i is greater than or equal to 1 and is less than or equal to n, n is greater than or equal to 2, i and n are integers, the lengths of the columns in the 1 st column to the nth column are different, and the distances between adjacent columns are different;
in the row direction, the distance between adjacent rows is the same, the length of the upright column positioned in the ith column in each row of upright columns is different, and the lengths of the upright columns in each row of upright columns are different.
2. The system for wireless charging alignment and information transfer based on a coil structure of claim 1, wherein:
receiving coil installs on receiving terminal equipment, and the one side that is provided with a plurality of stands on the receiving coil is located transmitting coil directly over, installs laser scanning range radar on the transmitting coil, and the stand on the receiving coil all installs towards laser scanning range radar, and laser scanning range radar acquires stand information on the receiving coil.
3. The system for wireless charging alignment and information transfer based on a coil structure of claim 2, wherein:
the column information on the receiving coil comprises a data head, line number information, self-coding of the receiving coil and a data tail;
the data head is the beginning of a certain row of column information, the length of the data head accounts for 10% of the position of the whole row of information, wherein 5% of the data head comprises the length of the column, and the rest 5% is the length without the column;
the line number information is formed by 5-bit column width, wherein the first 4-bit information consists of binary codes, the maximum is 16, and the width of the last column is the stop bit of the line number information;
the self code of the receiving coil is information representing the unique identity of the receiving terminal equipment and is used for pairing of the whole wireless charging system, the self code of the receiving coil is composed of 8 bits of data, each bit of data occupies the length of 3 upright posts, wherein an upright post is arranged on the length of a first upright post, and whether the upright post is contained or not is determined on the length of a second upright post according to the data; if the bit is 1, there is a column; if the bit is 0, there is no pillar here; the third upright column has no upright column in length and is used as a stop symbol;
the data tail represents the end of this line of information, starting from the end of the encoding of the last receiving coil itself, which information contains all the uprights.
4. The system for wireless charging alignment and information transfer based on a coil structure of claim 3, wherein:
in the information of each line, the information of the line number and the self-coding of the transmitting coil are repeatedly circulated until the end of the complete circulation can not be placed.
5. The system for wireless charging alignment and information transfer based on coil structure of claim 4, wherein:
the name or number of each row is defined by row number information that depends on the column in column i within the row.
6. The method for wireless charging alignment and information transmission based on the coil structure is characterized in that:
the equipment to be charged with the receiving equipment enters a charging area, and a receiving coil on the receiving equipment is matched with a transmitting coil of the power generation equipment through stand column information on the receiving coil, so that alignment and information transmission are realized;
the method comprises the steps that a laser scanning ranging radar on a transmitting device detects coded information formed by stand column information on a receiving coil, namely the stand column information, and the identity of the receiving coil, namely a unique coded address or unique identity information, is obtained;
the transmitting equipment can actively call the receiving equipment, establish connection with the receiving equipment and carry out mutual data transmission.
7. The method for wireless charging alignment and information transfer based on coil structure of claim 6, wherein:
the alignment of the transmitting coil and the receiving coil is as follows:
after the laser scanning range radar obtains the information of the upright column, analyzing a data head and a data tail, wherein the end of the data head is one boundary of a receiving coil, the end of the data tail is the other boundary of the receiving coil, acquiring the length of the whole receiving coil, and converting the receiving coil into a straight line with a fixed length to form a detection straight line;
and the standard straight line of the receiving coil is a straight line which is fitted by the laser scanning range radar after the receiving coil is detected under the condition that the receiving coil and the transmitting coil are aligned, and whether the receiving coil of the equipment to be charged is aligned with the transmitting coil of the power generation equipment is judged according to the position state of the detecting straight line and the standard straight line.
8. The method for wireless charging alignment and information transfer based on a coil structure of claim 7, wherein:
if the detection straight line is gradually close to the standard straight line and the detection straight line and the standard straight line are overlapped, the receiving coil is aligned to the transmitting coil;
if the detection straight line gradually approaches the standard straight line and deviates, the receiving coil is not aligned with the transmitting coil.
9. The method for wireless charging alignment and information transfer based on a coil structure of claim 8, wherein:
the offset of the receiving coil is judged by using the line number information,
when the laser scanning ranging radar scans a certain line, the line number of the line can be decoded, the line numbers are arranged in sequence, and the moving distance of the receiving coil is obtained according to the line number and the position of the line number of the last line.
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