Electronic price tag positioning antenna

Abstract

The utility model discloses an electronic price tag positioning antenna, which is arranged in an electronic price tag shell and comprises an antenna and a pavement, and the pavement comprises a first part and a second part. The antenna is arranged at a first position in the electronic price tag shell; the first part of the pavement is arranged at a second position in the electronic price tag shell; the second part of the pavement is connected with the antenna; wherein the first position and the second position are parallel to each other, the current directions are opposite, and the length range of the second part of the ground is larger than or equal to 3 / 4 wavelength and smaller than or equal to 1 wavelength. According to the utility model, the positioning accuracy of the electronic price tag can be improved while the cost of the electronic price tag is controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic price labels, in particular to an electronic price label positioning antenna. Background Art

[0002] This section is intended to provide background or context for the utility model embodiments. The description herein is not admitted to be prior art because it is included in this section.

[0003] With the widespread use of electronic price tags in supermarkets, retail, warehousing and logistics, there are many intelligent needs based on electronic tags, among which positioning needs are particularly concerned. Through the electronic price tags with known coordinates, the neighbor positioning function is used to obtain the information of the price tags at similar locations on the shelf. The price tag information corresponds to the product one by one, so as to obtain the location of the product; the electronic price tags with obtained location information can perform neighbor positioning operations in turn to obtain the location information of all corresponding products and upload the information to the server. Customers can call the server information through the handheld device to obtain the location of all products, which will greatly improve the work efficiency of staff in finding products, tracking replenishment, etc., and also facilitate customers to choose goods.

[0004] However, the existing electronic price tags only have one communication antenna and no specific directionality, so they are prone to receiving information from the opposite goods, resulting in positioning errors. In order to reduce the probability of positioning errors, another method is to bind the electronic price tag with shelf information through NFC to locate the product. Although this method improves the positioning accuracy to a certain extent, NFC can only obtain product information through near-field interaction, and near-field interaction requires that more tags with product information be placed around the electronic price tag so that it can be recognized by the electronic price tag at a close distance. At the same time, the electronic price tag itself needs to add a read-write chip, which is costly. Utility Model Content

[0005] The embodiment of the utility model provides an electronic price tag positioning antenna, which is used to improve the positioning accuracy of the electronic price tag while controlling the cost of the electronic price tag. The electronic price tag positioning antenna is arranged inside the electronic price tag housing, and includes: an antenna and a floor, and the floor includes a first part and a second part;

[0006] The antenna is arranged at a first position inside the electronic price tag housing;

[0007] The first part of the floor is arranged at a second position inside the electronic price tag housing;

[0008] The second part of the paving is connected to the antenna;

[0009] The first position and the second position are parallel to each other, the current directions are opposite, and the length range of the second part of the paving is greater than or equal to 3 / 4 wavelength and less than or equal to 1 wavelength.

[0010] Furthermore, the first portion of the paving and the second portion of the paving are perpendicular to each other.

[0011] Furthermore, the antenna is any one of the following: PCB, FPC, steel sheet, LDS.

[0012] Furthermore, the second part of the floor is connected to the antenna via a grounding point and a feeding point.

[0013] Furthermore, it also includes: a radio frequency circuit, and the antenna is directly connected to the radio frequency circuit through a microstrip line or a coaxial line.

[0014] The embodiment of the utility model provides another electronic price tag positioning antenna, which is used to improve the positioning accuracy of the electronic price tag while controlling the cost of the electronic price tag. The electronic price tag positioning antenna is arranged inside the electronic price tag housing, and includes: a first antenna, a second antenna and a floor;

[0015] The first antenna is arranged at a first position inside the electronic price tag housing;

[0016] The second antenna is arranged at a second position inside the electronic price tag housing; wherein the first position and the second position are parallel to each other, and the distance between the first position and the second position is greater than half a wavelength; and the current directions of the first antenna and the second antenna are opposite;

[0017] Two ends of the paving are connected to the first antenna and the second antenna respectively.

[0018] Furthermore, the first antenna and the second antenna are both perpendicular to the ground.

[0019] Furthermore, the first antenna and the second antenna are any one of the following: PCB, FPC, steel sheet, LDS.

[0020] Furthermore, two ends of the floor are connected to the first antenna and the second antenna through a grounding point and a feeding point respectively.

[0021] Furthermore, it also includes: a radio frequency circuit, and the input ports of the first antenna and the second antenna are directly connected to the radio frequency circuit through a microstrip line or a coaxial line.

[0022] In the embodiment of the utility model, the electronic price tag positioning antenna is arranged inside the electronic price tag housing, including: an antenna and a floor, the floor including a first part and a second part; the antenna is arranged at a first position inside the electronic price tag housing; the first part of the floor is arranged at a second position inside the electronic price tag housing; the second part of the floor is connected to the antenna; wherein the first position and the second position are parallel to each other, the current direction is opposite, and the length range of the second part of the floor is greater than or equal to 3 / 4 wavelength and less than or equal to 1 wavelength. In this way, by respectively arranging the antenna and the first part of the floor inside the electronic price tag housing at the first position and the second position, since the first position and the second position are parallel to each other and the current direction is opposite, the forward radiation electric field cancels each other; and the length of the floor of the second part is greater than or equal to 3 / 4 wavelength and less than or equal to 1 wavelength, plus the length of the antenna at the first position and the floor at the second position, the total length exceeds 1 wavelength, which will cause the forward radiation to be split, so that the forward radiation is reduced; most of the antenna beam energy will be concentrated on the shelf, weakening the beam energy of the opposite shelf, thereby reducing the probability of electronic price tag positioning errors, and realizing the improvement of the positioning accuracy of the electronic price tag while saving the cost of the electronic price tag. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0024] Figure 1 A schematic diagram of an electronic price tag positioning antenna provided in an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of another electronic price tag positioning antenna provided in an embodiment of the utility model;

[0026] Figure 3 The radiation pattern of the electronic price tag positioning antenna provided in the embodiment of the utility model;

[0027] Figure 4 A radiation pattern of another electronic price tag positioning antenna provided in an embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of an electronic price tag antenna with a separate communication antenna provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0030] In the description of this specification, the terms "include", "including", "have", "contain", etc. are all open terms, which mean including but not limited to. The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", etc. mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the order of steps is not limited and can be appropriately adjusted as needed.

[0031] Research has found that the existing electronic price tags only have one communication antenna and no specific directionality, so they are prone to receiving information from the opposite goods, resulting in positioning errors. In order to reduce the probability of positioning errors, another method is to bind the electronic price tag with shelf information through NFC to locate the product. Although this method improves positioning accuracy to a certain extent, NFC can only obtain product information through near-field interaction, and near-field interaction requires that more tags with product information be placed around the electronic price tag so that it can be recognized by the electronic price tag at a close distance. At the same time, the electronic price tag itself needs to add a read-write chip, which is costly.

[0032] In response to the above research, an embodiment of the utility model proposes an electronic price tag positioning antenna, which is integrated inside the electronic price tag. By adjusting the shape and size of the antenna and the floor, the antenna radiation pattern is improved, the energy value of mutual communication between the electronic price tags on this shelf is increased, and the energy value received by the electronic price tags on the opposite shelf is weakened, thereby reducing the probability of electronic price tag positioning errors, thereby achieving the goal of saving the cost of electronic price tags while improving the positioning accuracy of electronic price tags.

[0033] In the embodiment of the utility model, the principle of the electronic price tag positioning antenna is: the electronic price tag positioning antenna is arranged inside the electronic price tag shell, and by changing the shape and size of the antenna and the floor, or setting the antenna in the form of multiple antennas, the antenna forms a pair or n pairs of current branches in opposite directions on both sides of the symmetrical side of the electronic price tag during operation, so that the radiation energy perpendicular to the screen (forward) cancels each other, and the radiation energy parallel to the screen (lateral) is enhanced.

[0034] Figure 1 This is a schematic diagram of an electronic price tag positioning antenna provided by an embodiment of the utility model. The electronic price tag positioning antenna is arranged inside the electronic price tag housing, and is preferably arranged on a PCB board. The electronic price tag positioning antenna forms a pair or n pairs of current branches in opposite directions on both sides of the symmetrical sides of the electronic price tag by changing the shape and size of the antenna and the ground. Figure 1 As shown, the electronic price tag positioning antenna includes: an antenna 1 and a floor 2, the floor 2 includes a first part 21 and a second part 22;

[0035] Antenna 1 is arranged at a first position inside the electronic price tag housing;

[0036] The first floor-paved portion 21 is arranged at a second position inside the electronic price label housing;

[0037] The second part 22 of the floor is connected to the antenna 1;

[0038] The first position and the second position are parallel to each other, the current directions are opposite, and the length range of the second part of the paving is greater than or equal to 3 / 4 wavelength and less than or equal to 1 wavelength.

[0039] In specific implementation, the first and second parts of the floor are integrally arranged. Preferably, the first and second parts of the floor are perpendicular to each other, so that the other polarized electric field introduced by the second part of the floor is relatively small, which is conducive to improving forward radiation.

[0040] In one embodiment, the antenna may be any one of the following: PCB, FPC, steel sheet, LDS.

[0041] In one embodiment, Figure 1 As shown, the second part of the ground plane can be connected to the antenna via a ground point 41 and a feeding point 42 .

[0042] In one embodiment, the electronic price tag positioning antenna may further include: a radio frequency circuit, and the antenna is directly connected to the radio frequency circuit via a microstrip line or a coaxial line.

[0043] In the embodiment of the utility model, Figure 1The electronic price tag positioning antenna shown is composed of an antenna and a floor, wherein the antenna is arranged at a first position inside the electronic price tag housing; the first part of the floor is arranged at a second position inside the electronic price tag housing; the first position and the second position are parallel to each other, the current directions are opposite, and the length range of the second part of the floor is greater than or equal to 3 / 4 wavelength and less than or equal to 1 wavelength; in this way, the current directions generated by the antenna and the first part of the floor can be opposite by adjusting the shapes of the antenna and the floor, and at the same time, by setting the length of the second part of the floor to be greater than or equal to 3 / 4 wavelength and less than or equal to 1 wavelength, the total length of the floor plus the antenna is greater than 1 wavelength, and the radiation pattern will produce a petal phenomenon in the forward direction, so that the radiation energy perpendicular to the screen (forward direction) is weakened (see Figure 3 , which is the radiation pattern of the electronic price tag positioning antenna provided in the embodiment of the utility model, thereby weakening the energy in front and behind the screen and maintaining the side energy, thereby reducing the probability of electronic price tag positioning errors, thereby saving the cost of electronic price tags and improving the positioning accuracy of electronic price tags.

[0044] Figure 2 A schematic diagram of another electronic price tag positioning antenna provided by an embodiment of the utility model, wherein the electronic price tag positioning antenna is arranged inside the electronic price tag housing, and is preferably arranged on a PCB board. The electronic price tag positioning antenna is formed by setting the antenna in the form of a multi-antenna to form a pair or n pairs of current branches in opposite directions on the symmetrical sides of the electronic price tag, such as Figure 2 As shown, the electronic price tag positioning antenna includes: a first antenna T1, a second antenna T2 and a floor surface P;

[0045] The first antenna T1 is arranged at a first position inside the electronic price tag housing;

[0046] The second antenna T2 is arranged at a second position inside the electronic price tag housing; wherein the first position and the second position are parallel to each other, and the interval range between the first position and the second position is greater than half a wavelength; and the current directions of the first antenna and the second antenna are opposite;

[0047] Two ends of the pavement P are connected to the first antenna and the second antenna respectively.

[0048] In one embodiment, the first antenna and the second antenna are both perpendicular to the ground plane, so that other polarized electric fields introduced by the ground plane are relatively small, which is beneficial to improving forward radiation.

[0049] In one embodiment, the antenna may be any one of the following: PCB, FPC, steel sheet, LDS.

[0050] In one embodiment, Figure 2 As shown, the two ends of the above-mentioned floor are connected to the first antenna and the second antenna through a grounding point 51 and a feeding point 52 respectively.

[0051] In one embodiment, it may further include: a radio frequency circuit;

[0052] The first antenna and the second antenna are directly connected to the radio frequency circuit via a microstrip line or a coaxial line.

[0053] In the embodiment of the utility model, Figure 2 The electronic price tag positioning antenna shown is composed of two antennas and a ground plane. The first antenna is set at the first position inside the electronic price tag shell; the second antenna is set at the second position inside the electronic price tag shell; the first position and the second position are parallel to each other, opposite in phase, and separated by more than half a wavelength; in this way, approximately symmetrical current branches are formed between the first antenna and the second antenna (the current directions of the first antenna and the second antenna are opposite), so that the radiation energy perpendicular to the screen cancels each other, and the radiation energy parallel to the screen is enhanced (see Figure 3 , which is the radiation pattern of the electronic price tag positioning antenna provided in the embodiment of the utility model, thereby weakening the energy in front and behind the screen, enhancing or maintaining the side energy, and further reducing the probability of electronic price tag positioning errors, thereby achieving the goal of saving the cost of electronic price tags while improving the positioning accuracy of electronic price tags.

[0054] In the embodiment of the utility model, the electronic price tags are installed side by side on the guide rails and evenly distributed on the shelves. Since the distance between adjacent electronic price tags is much smaller than the distance between electronic price tags on the opposite shelf, when positioning, according to the Friis formula, the sum of the antenna gains of the opposite radiation minus about 10db is less than the sum of the gains of the adjacent radiations, which can ensure that the number of adjacent electronic price tags received by the electronic price tag will be greater, which is more conducive to judgment. Therefore, the electronic price tag positioning antenna in the embodiment of the utility model does not strictly pursue that the antenna gain in the vertical direction (forward direction) of the screen must be less than the antenna gain in the parallel direction (lateral direction). As long as it can ensure that the sum of the gains of the forward radiation is about -10db less than the sum of the gains of the lateral radiation, refer to Figure 4 , which is a radiation pattern of another electronic price tag positioning antenna provided in an embodiment of the utility model.

[0055] When it comes to specific implementation, Figure 1 or Figure 2 The electronic price tag positioning antenna shown can be located at any position inside the electronic price tag housing, for example, on a PCB board, or on an FPC, or as a separate individual, or attached to the housing surface, etc. If the electronic price tag positioning antenna is on a PCB board, or on an FPC, the first position and the second position may refer to positions on the PCB board, or on the FPC.

[0056] In a specific implementation, the electronic price tag positioning antenna may also include a radio frequency circuit. Figure 1 and Figure 2 In the present invention, the antenna can be directly connected to the RF circuit through a microstrip line or a coaxial line.

[0057] During specific implementation, an antenna matching circuit may be retained at the antenna input port to improve antenna standing wave and efficiency.

[0058] In one embodiment, the electronic price tag positioning antenna can also be used alone for positioning, and there is also a separate communication antenna, such as Figure 5 , which is a schematic diagram of an electronic price tag antenna with a separate communication antenna provided by an embodiment of the utility model.

[0059] In one embodiment, considering that the radiation direction of the antenna is easily affected by the metal shelf, when installing the electronic price tag, the distance between the electronic price tag and the shelf can be increased by increasing the thickness of the guide rail, raising the height of the guide rail or other means, so as to improve the antenna radiation pattern and achieve the purpose of precise intelligent positioning.

[0060] To sum up, the electronic price tag positioning antenna of the embodiment of the utility model can improve the radiation direction of the antenna, increase the energy value of the mutual communication between the electronic price tags on this shelf, weaken the energy value of the electronic price tags on the opposite side by side shelves, and automatically locate the position of the electronic price tag on this shelf, making the position acquisition method more intelligent and convenient for customers to find products quickly.

[0061] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. An electronic price tag positioning antenna, arranged inside an electronic price tag housing, characterized in that: include: An antenna and a ground plane, wherein the ground plane comprises a first part and a second part; The antenna is arranged at a first position inside the electronic price tag housing; The first part of the floor is arranged at a second position inside the electronic price tag housing; The second part of the paving is connected to the antenna; The first position and the second position are parallel to each other, the current directions are opposite, and the length range of the second part of the paving is greater than or equal to 3 / 4 wavelength and less than or equal to 1 wavelength.

2. The electronic price tag positioning antenna according to claim 1, characterized in that: The first portion of the paving and the second portion of the paving are perpendicular to each other.

3. The electronic price tag positioning antenna according to claim 1, characterized in that: The antenna is any one of the following: PCB, FPC, steel sheet, LDS.

4. The electronic price tag positioning antenna according to claim 1, characterized in that: The second part of the floor covering is connected to the antenna via a grounding point and a feeding point.

5. The electronic price tag positioning antenna according to claim 1, characterized in that: Also includes: The radio frequency circuit, the antenna is directly connected to the radio frequency circuit through a microstrip line or a coaxial line.

6. An electronic price tag positioning antenna, arranged inside an electronic price tag housing, characterized in that: include: First antenna, second antenna and ground plane; The first antenna is arranged at a first position inside the electronic price tag housing; The second antenna is arranged at a second position inside the electronic price tag housing; wherein the first position and the second position are parallel to each other, and the distance between the first position and the second position is greater than half a wavelength; and the current directions of the first antenna and the second antenna are opposite; Two ends of the paving are connected to the first antenna and the second antenna respectively.

7. The electronic price tag positioning antenna according to claim 6, characterized in that: The first antenna and the second antenna are both perpendicular to the ground.

8. The electronic price tag positioning antenna according to claim 6, characterized in that: The first antenna and the second antenna are any one of the following: PCB, FPC, steel sheet, LDS.

9. The electronic price tag positioning antenna according to claim 6, characterized in that: The two ends of the floor are connected to the first antenna and the second antenna through a grounding point and a feeding point respectively.

10. The electronic price tag positioning antenna according to claim 6, characterized in that: Also includes: A radio frequency circuit, wherein input ports of the first antenna and the second antenna are directly connected to the radio frequency circuit via a microstrip line or a coaxial line.

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