Position information detection system

Abstract

The utility model discloses a position information detection system. The position information detection system comprises a reader-writer and an upper computer. The reader-writer comprises at least one first antenna and at least one second antenna; the at least one first antenna and the at least one second antenna are arranged around a production line or a goods shelf, the production line or the goods shelf is provided with at least one measured object, and a radio frequency identification tag is attached to the measured object; the reader-writer is connected with the upper computer; the reader-writer is configured to transmit signals to the radio frequency identification tag of the measured object for at least two times through the first antenna, and receive feedback signals of the radio frequency identification tag of the measured object through all the first antennas and all the second antennas; the upper computer is configured to determine position information of the measured object according to feedback signals of the first antennas and the second antennas; wherein the position information comprises at least one of the position coordinate, the moving direction and the moving distance of the measured object. According to the technical scheme of the utility model, the production process and warehouse management are optimized.

Description

Technical Field

[0001] This utility model relates to the field of positioning technology, and in particular to a location information detection system. Background Technology

[0002] In modern logistics, warehousing management, and production line automation, RFID (Radio Frequency Identification) technology is widely used for tracking and managing goods due to its contactless and efficient identification characteristics. By attaching RFID tags to items, the system can quickly read the information in the tags, enabling automatic identification and data collection of the items.

[0003] Existing RFID systems typically rely on readers at fixed locations to read tag information. While this can determine the location of an item, it cannot directly determine the direction of its movement. For example, in a warehouse inbound / outbound scenario, items may pass through the same reader area, and the data read by the reader alone is insufficient to distinguish whether an item is entering or leaving the warehouse. Similarly, on a production line, items may move between different locations, and existing RFID systems cannot accurately determine the direction and distance of movement. Utility Model Content

[0004] This invention provides a location information detection system to solve the problem that existing RFID systems cannot accurately determine the movement path and direction of objects.

[0005] According to one aspect of the present invention, a location information detection system is provided, comprising: a reader / writer and a host computer;

[0006] The reader includes at least one first antenna and at least one second antenna; at least one first antenna and at least one second antenna are arranged around a production line or shelf, and at least one object to be tested is arranged on the production line or shelf, and the object to be tested is attached with a radio frequency identification tag.

[0007] The reader is connected to the host computer; the reader is configured to transmit at least two signals to the RFID tag of the object under test through the first antenna, and after each signal transmission, receive feedback signals from the RFID tag of the object under test through all the first antennas and all the second antennas; the host computer is configured to determine the position information of the object under test based on the feedback signals from each of the first antennas and each of the second antennas; wherein the position information includes at least one of the position coordinates, direction of movement, and distance of movement of the object under test.

[0008] Optionally, the object under test is located on the production line or shelf, and all the first antennas and all the second antennas are located on a testing platform, which is at least partially arranged around the production line.

[0009] Optionally, all the first antennas and all the second antennas are arranged along a first direction; the first direction is the extension direction of the production line or shelf.

[0010] Alternatively, all the first antennas and all the second antennas are arranged in an arc.

[0011] Optionally, when all the first antennas and all the second antennas are arranged along a first direction; all the first antennas and all the second antennas are located on the same side of the production line;

[0012] Alternatively, all of the first antennas and a portion of the second antennas are located on a first side of the production line, and another portion of the second antennas are located on a second side of the production line; the first side is opposite to the second side.

[0013] Alternatively, a portion of the first antenna and a portion of the second antenna may be located on the first side of the production line, while another portion of the first antenna and another portion of the second antenna may be located on the second side of the production line.

[0014] Optionally, the location information detection system further includes a first support;

[0015] The first support is at least partially positioned around the production line or the shelf;

[0016] All of the first antennas are located on the inner wall of the first bracket; wherein the inner wall of the first bracket is the surface of the first bracket close to the object being measured; the center of the inner wall of the first bracket is recessed relative to the edge of the inner wall;

[0017] All of the second antennas are located at the edge of the first bracket; or, a portion of the second antennas are located at the edge of the first bracket, and another portion of the second antennas are located on the inner wall of the first bracket.

[0018] Optionally, the first support is an insulating support.

[0019] Optionally, the object being measured is located on the shelf or production line; the position information detection system further includes a second support.

[0020] The location information detection system includes multiple second antennas; all the first antennas and all the second antennas are located on the second bracket;

[0021] At least one of the first antennas and at least one of the second antennas are located on the third side of the shelf and arranged along a second direction; wherein, the second direction is the arrangement direction of each layer of the shelf, or a direction perpendicular to the plane of the production line;

[0022] At least two of the second antennas are located on the fourth side of the shelf or production line and are arranged along the second direction; wherein the fourth side of the shelf or production line is opposite to the third side of the shelf or production line.

[0023] At least two of the second antennas are located on the fifth side of the shelf or production line and are arranged in an array; wherein the fifth side of the shelf or production line is opposite to the plane on which the shelf or production line is located and is adjacent to the third side of the shelf or production line.

[0024] Optionally, when the object under test is located on the shelf, the first antenna and a second antenna are located on the third side of the shelf;

[0025] The height of the first antenna from the plane where the shelf is located is greater than or equal to one-third of the total height of the shelf, and less than one-half of the total height of the shelf;

[0026] The height of the second antenna located on the third side of the shelf from the plane on which the shelf is located is greater than or equal to one-half of the total height of the shelf and less than or equal to two-thirds of the total height of the shelf;

[0027] Two second antennas are located on the fourth side of the shelf; the height of one second antenna on the fourth side of the shelf from the plane of the shelf is greater than or equal to one-third and less than one-half of the total height of the shelf; the height of the other second antenna on the fourth side of the shelf from the plane of the shelf is greater than or equal to one-half and less than two-thirds of the total height of the shelf.

[0028] Optionally, the second bracket is an insulating bracket.

[0029] Optionally, the location information detection system further includes an alarm;

[0030] The host computer is connected to the alarm device. The host computer is configured to send an alarm control signal to the alarm device when the difference between the position coordinates of the measured object and the preset coordinates in the preset trajectory corresponding to the measured object exceeds a preset threshold. The alarm device is configured to issue an alarm message when it receives the alarm control signal.

[0031] The technical solution of this utility model embodiment includes a reader / writer comprising at least one first antenna and at least one second antenna, which is installed around the production line or shelf. It can receive signals from RFID tags from different angles and directions, thereby improving signal stability and detection accuracy. Through the cooperation of the reader / writer and the host computer, and through multiple signal transmissions and receptions of the first and second antennas, the position coordinates, direction of movement, and distance of the measured object can be determined based on the transmission duration and signal strength of the feedback signal. This solves the problem that traditional RFID cannot determine the movement path and direction, optimizing production processes and warehouse management.

[0032] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a location information detection system provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the planar arrangement of an antenna provided in an embodiment of the present utility model;

[0036] Figure 3 This is a schematic diagram of another planar arrangement of antennas provided in an embodiment of this utility model;

[0037] Figure 4 This is a schematic diagram of the planar arrangement of another antenna provided in this embodiment of the utility model;

[0038] Figure 5 This is a schematic diagram of the planar arrangement of another antenna provided in this embodiment of the present utility model;

[0039] Figure 6 This is a schematic diagram of the planar arrangement of another antenna provided in this embodiment of the present utility model;

[0040] Figure 7 This is a schematic diagram of a three-dimensional arrangement of an antenna provided in an embodiment of the present utility model;

[0041] Figure 8This is a schematic diagram of a three-dimensional arrangement of an antenna provided in an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of a three-dimensional antenna arrangement provided in another embodiment of the present invention. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] Figure 1 This is a schematic diagram of a location information detection system provided in an embodiment of the present invention. This embodiment is applicable to high-precision positioning, dynamic tracking, and other situations, and can be configured in fields such as industrial manufacturing and production lines, warehousing and logistics. Figure 1 As shown, the location information detection system includes: a reader / writer 101 and a host computer 103;

[0046] The reader 101 includes at least one first antenna 1011 and at least one second antenna 1012; the at least one first antenna 1011 and at least one second antenna 1012 are arranged around the production line 102 or shelf 30, and at least one object under test 1021 is arranged on the production line 102 or shelf 30, and an RFID tag is attached to the object under test 1021.

[0047] The reader 101 is connected to the host computer 103. The reader 101 is configured to transmit at least two signals to the radio frequency identification tag of the object under test 1021 through the first antenna 1011, and after each signal transmission, receive the feedback signal of the radio frequency identification tag of the object under test 1021 through all the first antennas 1011 and all the second antennas 1012. The host computer 103 is configured to determine the position information of the object under test 1021 based on the feedback signals of each first antenna 1011 and each second antenna 1012. The position information includes at least one of the position coordinates, direction of movement and distance of movement of the object under test 1021.

[0048] in, Figure 1The two objects 1021 shown represent the same object 1021 in different locations. The reader 101 is the core device of the location information detection system, communicating with the RFID tag. The reader 101 remains stationary relative to the production line 102 or shelf 30 where the object 1021 is located; that is, the reader 101 is fixedly installed, and the first antenna 1011 and the second antenna 1012 are also fixedly installed. The reader 101 is equipped with at least one first antenna 1011 and at least one second antenna 1012. The first antenna 1011 and the second antenna 1012 can be pre-configured so that the first antenna 1011 can be used to transmit and receive RFID signals, and the second antenna 1012 can be used to receive RFID signals. At least one first antenna 1011 and at least one second antenna 1012 are arranged around the production line 102 or shelf 30 to ensure coverage of the moving area of ​​the object 1021. One or more objects 1021 to be tested are placed on production line 102 or shelf 30. These objects 1021 may be products, components, or other items requiring tracking. Each object 1021 is attached with a radio frequency identification (RFID) tag. The RFID tag stores data and communicates with reader 101 via radio waves. When the RFID tag enters the signal range of reader 101, it is activated and sends the stored information back to reader 101. Reader 101 can be connected to host computer 103 via wired or wireless means. Host computer 103 is responsible for data processing and analysis. The first antenna 1011 of reader 101 actively sends two or more read signals to the RFID tag on object 1021. A preset time interval can be allowed between adjacent transmissions. All first antennas 1011 and all second antennas 1012 of reader 101 receive feedback signals returned by the RFID tag. The spatial positional differences of the object under test 1021 will result in different transmission durations and received signal strength indicators (RSSI) of the received feedback signals. By transmitting signals multiple times and combining the transmission durations and signal strengths of the received feedback signals, the dynamic changes of the object under test 1021 can be obtained.

[0049] Specifically, after transmitting a signal, if the signal strength of the feedback signal at the current moment is equal to the signal strength of the feedback signal at the next moment, the reader 101 needs to resend the read signal, reacquire the feedback signal, and redetermine the signal strength of the feedback signal. If the difference between the signal strength of the feedback signal at the current moment and the signal strength of the feedback signal at the next moment is greater than a preset configuration value, the reader 101 also needs to resend the read signal, reacquire the feedback signal, and redetermine the signal strength of the feedback signal. The preset configuration value is configured and confirmed during deployment based on the actual application environment. The host computer 103 collects the signal strength value of the feedback signal and determines the direction of movement based on the magnitude relationship of the signal strength values ​​of the feedback signals from each antenna. The relative position of the object to the reader 101 can be determined by sorting the intensity values ​​of each feedback signal. For example, for the first antenna 1011, if the signal strength of the second acquired feedback signal is greater than that of the first acquired feedback signal, it is determined that the object 1021 is getting closer to the reader 101, meaning the object 1021 is moving in the direction closer to the reader 101. Conversely, if the signal strength of the second acquired feedback signal is less than that of the first acquired feedback signal, the object 1021 is getting farther away from the reader 101, meaning the object 1021 is moving away from the reader 101. Similarly, for the second antenna 1012, the movement direction of the object 1021 can be determined based on the relationship between the signal strengths of the two acquired feedback signals from the second antenna 1012. This can be used to verify the movement direction determined based on the signal strength of the feedback signal from the first antenna 1011, improving the accuracy of determining the movement direction of the object 1021. If only one first antenna 1011 is used, when the distance between the measured object 1021 and the first antenna 1011 remains unchanged, that is, when the measured object 1021 moves along the arc with the first antenna 1011 as the center, the signal strength of the feedback signal obtained by the first antenna 1011 remains unchanged, and the direction of movement of the measured object 1021 cannot be accurately determined.

[0050] The distance moved is calculated using the transmission time of the feedback signal received by the antenna. For example, the first antenna 1011 transmits two signals to the RFID tag of the object under test 1021. The signals are transmitted in the form of electromagnetic waves between the object under test 1021 and the first antenna 1011. The speed of electromagnetic wave propagation in air is v. The transmission time of the first antenna 1011 receiving the feedback signal for the first time is t1, and the transmission time of the second reception is t2. For example, if the reader 101 is located at the origin coordinates, the direction of the production line 102 is the horizontal axis, and the direction perpendicular to the production line 102 is the vertical axis (e.g., if the production line 102 is a straight line), then the vertical axis coordinate of the object under test 1021 on the production line 102 remains unchanged. The position coordinates of the object under test 1021 when the first signal is transmitted can be determined using the formula x1 = v * t1. Similarly, the position coordinates of the object under test 1021 when the second signal is transmitted can be determined using the formula x2 = v * t2. The distance moved by the object under test 1021 can be calculated based on the position coordinates determined by the two signal transmissions. The position coordinates of the measured object 1021 at the time of the first signal transmission are determined by using the transmission duration t3 and propagation speed v of the first feedback signal corresponding to the second antenna 1012. Similarly, the position coordinates of the measured object 1021 at the time of the second signal transmission are determined by using the transmission duration t4 and propagation speed v of the second feedback signal. Therefore, the moving distance of the measured object 1021 is determined based on these two position coordinates. The position coordinates and moving distance of the measured object 1021 are verified using the second antenna 1012. This improves measurement accuracy. Furthermore, the second antenna 1012 only receives signals and does not transmit signals, avoiding potential self-interference during signal transmission, reducing interference to other devices, decreasing system power consumption, and lowering costs.

[0051] For example, when production line 102 is an arc, the horizontal and vertical coordinates of the object under test 1021 on production line 102 will change. Assume the first antenna 1011 is located at the center of the arc and the origin (0,0), and the second antenna 1012 is located at (L,0). The first antenna 1011 transmits two signals to the RFID tag of the object under test 1021. The signals are transmitted in the form of electromagnetic waves between the object under test 1021 and the first antenna 1011. The speed of electromagnetic wave propagation in air is v. The transmission time of the first feedback signal received by the first antenna 1011 is t5, and the transmission time of the second feedback signal received is t6. The transmission time of the first feedback signal received by the second antenna 1012 is t7, and the transmission time of the second feedback signal is t8. The coordinates of the object under test 1021 are (x3, y3), then x3... 2 +y3 2 =((v*t5) / 2) 2 (x3-L) 2 +y3 2 =(v*t7 / 2)2 The position coordinates x3 of the measured object 1021 at the time of the first signal transmission can be determined as [L]. 2 -v 2 (t7 2 -t5 2 ) / 4] / 2L, The distance the measured object moved can be calculated based on the position coordinates determined by the two transmitted signals. Similarly, the position coordinates of the measured object 1021 at the time of the second transmitted signal can be calculated using the formula: x4=[L 2 -v 2 (t8 2 -t6 2 ) / 4] / 2L, The distance moved was determined by the position coordinates of the measured object 1021 during the two signal transmissions.

[0052]

[0053] For example, when the object under test 1021 is on the shelf 30, its movement along one direction is similar to its movement on the production line 102, and the method for determining its position information is the same. When the horizontal and vertical coordinates of the object under test 1021 on the shelf 30 may change, at least one first antenna 1011 and multiple second antennas 1012 can be set up, such that multiple antennas (at least one first antenna and multiple second antennas) are arranged around the shelf 30. That is, antennas are set up in various directions around the shelf 30, and each antenna in each direction detects the movement distance in that direction, thus realizing the detection of the position information of the object under test 1021.

[0054] The technical solution of this utility model embodiment includes a reader / writer comprising at least one first antenna and at least one second antenna, which is installed around the production line or shelf. It can receive feedback signals from RFID tags from different angles and directions, thereby improving signal stability and detection accuracy. Through the cooperation of the reader / writer and the host computer, and through multiple signal transmissions and receptions of the first and second antennas, the position coordinates, direction of movement, and distance of the measured object can be determined based on the transmission duration and signal strength of the feedback signal. This solves the problem that traditional RFID cannot determine the movement path and direction, optimizing production processes and warehouse management.

[0055] In some optional embodiments of this utility model, reference continues to be made. Figure 1 The object under test 1021 is located on production line 102 or shelf 30, and all first antennas 1011 and all second antennas 1012 are located on the testing platform, which is set up at least partially around production line 102.

[0056] The detection platform is a structure for mounting antennas (first antenna 1011 and second antenna 1012) and a reader 101, ensuring that the antennas and reader 101 are fixed in position and that the antennas can effectively communicate with the RFID tags on the object under test 1021 on the production line 102. By setting the detection platform partially or entirely around the production line 102, the antennas are deployed in a planar manner, forming a two-dimensional array. This ensures that the RFID antennas can cover the area on the production line 102, thereby achieving omnidirectional detection of the object under test 1021. In some embodiments, the object under test 1021 is located on a shelf 30, and an RFID tag is attached to the object under test 1021. All antennas, i.e., at least one first antenna 1011 and at least one second antenna 1012, are installed at each location or aisle of the shelf 30. The reader 101 receives feedback signals returned by the RFID tags through all the first antennas 1011 and all the second antennas 1012. The spatial position difference of the object under test 1021 will result in different transmission durations and signal strengths of the received feedback signals. By transmitting signals multiple times and combining the transmission duration and signal strength of the received feedback signals, the position information of the measured object 1021 can be determined.

[0057] Figure 2 This is a schematic diagram of the planar arrangement of an antenna according to an embodiment of the present invention. Figure 3 This is a schematic diagram of another planar arrangement of antennas provided in this embodiment of the present invention, for reference. Figure 2 and Figure 3 In some optional embodiments of this utility model, all first antennas 1011 and all second antennas 1012 are arranged along a first direction x; the first direction x is the extension direction of the production line or shelf.

[0058] Alternatively, all first antennas 1011 and all second antennas 1012 are arranged in an arc.

[0059] Among them, such as Figure 2 As shown, all first antennas 1011 and second antennas 1012 are arranged sequentially along the straight direction of the production line, i.e., the first direction x, forming a linear array. This is suitable when the production line is linear, and the antennas can cover the entire length of the production line. The extension direction of the shelf is parallel to the ground and is the arrangement direction of the measured objects 1021 on the shelf. This is suitable when there is a row of measured objects 1021 on the shelf. Figure 3 As shown, all antennas are arranged in an arc around the object being measured 1021. This design is suitable for area coverage and is ideal for scenarios requiring comprehensive monitoring within a given area.

[0060] Figure 4 This is a schematic diagram of another planar arrangement of an antenna provided by an embodiment of the present invention. Figure 5This is a schematic diagram of another planar arrangement of an antenna provided by an embodiment of the present invention. Figure 6 This is a schematic diagram of another planar arrangement of an antenna provided by an embodiment of the present invention. In some optional embodiments of the present invention, refer to... Figure 2 , Figure 4 , Figure 5 and Figure 6 When all first antennas 1011 and all second antennas 1012 are arranged along the first direction x; all first antennas 1011 and all second antennas 1012 are located on the same side of the production line;

[0061] Alternatively, the first antenna 1011 and part of the second antenna 1012 are located on the first side B1 of the production line, and another part of the second antenna 1012 is located on the second side B2 of the production line; the first side B1 is opposite to the second side B2.

[0062] Alternatively, a portion of the first antenna 1011 and a portion of the second antenna 1012 may be located on the first side B1 of the production line, while another portion of the first antenna 1011 and another portion of the second antenna 1012 may be located on the second side B2 of the production line.

[0063] Among them, such as Figure 2 As shown, all first antennas 1011 and all second antennas 1012 are arranged along the first direction x; all first antennas 1011 and all second antennas 1012 are located on the same side of the production line. Concentrating all antennas on the same side of the production line, with close proximity between them, reduces external signal interference and improves detection accuracy. Furthermore, centralized antenna arrangement reduces wiring and equipment installation costs. Figure 4 As shown, all the first antennas 1011 and a portion of the second antennas 1012 are installed on the first side B1 of the production line, while another portion of the second antennas 1012 are installed on the opposite side. This layout distributes the antennas on both sides of the production line, forming a symmetrical arrangement. By arranging antennas on both sides, omnidirectional detection of objects can be achieved, and the signals received by the antennas on both sides can be compared separately to more accurately determine the direction of movement of the object 1021 under test. Figure 5 As shown, all the first antennas 1011 and a portion of the second antennas 1012 are mounted on the first side B1 of the production line, while another portion of the second antennas 1012 is mounted on the opposite side. Figure 6As shown, a portion of the first antenna 1011 and a portion of the second antenna 1012 are installed on the first side B1 of the production line, while another portion of the first antenna 1011 and another portion of the second antenna 1012 are located on the second side B2 of the production line. When the object under test 1021 moves on the production line, it can be ensured that at least one side of the antennas can clearly receive the signal from the object under test 1021, thereby improving signal stability and reliability. Simultaneously, all the first antennas 1011 and all the second antennas 1012 installed on the second side B2 of the production line can be pre-configured so that all the first antennas 1011 can be used to transmit and receive RFID signals, and all the second antennas 1012 can be used to receive RFID signals. All the first antennas 1011 and all the second antennas 1012 will receive feedback signals returned by the RFID tag. Through multiple signal transmissions, combined with the transmission duration and signal strength of the received feedback signals, the dynamic changes of the object under test 1021 are obtained. The first antenna 1011 installed on the first side B1 of the production line transmits RFID signals at least twice, and the first antenna 1011 and the second antenna 1012 installed on the first side B1 of the production line can receive feedback signals from the RFID tag of the object under test 1021 at least twice, thereby determining the location information of the object under test 1021. Similarly, the first antenna 1011 installed on the second side B2 of the production line transmits RFID signals at least twice, and the first antenna 1011 and the second antenna 1012 installed on the first side B1 of the production line can receive feedback signals from the RFID tag of the object under test 1021 at least twice, thereby determining the location information of the object under test 1021. This allows for the verification of the location information of the object under test 1021 measured by all antennas installed on the first side B1 of the production line.

[0064] Figure 7 This is a schematic diagram of a three-dimensional arrangement of an antenna according to an embodiment of the present invention. Figure 8 This is a schematic diagram of a three-dimensional antenna arrangement provided in an embodiment of the present invention. In some optional embodiments of the present invention, such as... Figure 7 or Figure 8 As shown, the location information detection system also includes a first support 10;

[0065] The first support 10 is at least partially positioned around the production line or shelf;

[0066] All first antennas 1011 are located on the inner wall of the first support 10; wherein, the inner wall of the first support 10 is the surface of the first support 10 close to the object 1021 being measured; the center of the inner wall of the first support 10 is recessed relative to the edge of the inner wall.

[0067] All second antennas 1012 are located at the edge of the first support 10; or, a portion of the second antennas 1012 are located at the edge of the first support 10, and another portion of the second antennas 1012 are located on the inner wall of the first support 10.

[0068] The first bracket 10 is partially set around the production line or shelf, and can adopt a semi-enclosed structure, extending longitudinally along the production line or shelf to form a non-closed monitoring area. The center of the inner wall is recessed relative to the edge of the inner wall, forming a radar "dish" structure. The inner wall of the first bracket 10 refers to the surface close to the object being measured 1021, allowing the first antenna 1011 to directly face the object being measured 1021, facilitating signal interaction between the antenna and the RFID tag. The number of first antennas 1011 can be one, two, or even more. All second antennas 1012 are installed at the edge of the first bracket 10. This can cover a wider area and extend the signal coverage range of the inner wall antennas. By comparing the signals of the inner wall antennas and the edge antennas, the direction of movement of the object being measured 1021 can be determined. Alternatively, some second antennas 1012 can be located at the edge of the first bracket 10, while others can be located on the inner wall of the first bracket 10. The number and position of the antennas can be adjusted according to specific needs; for example, inner wall antennas can be added in areas requiring higher directional accuracy, while edge antennas can be added in areas requiring wider coverage. Figure 8 As shown, the first bracket 10 is at least partially arranged around the production line or shelf, forming a physical support frame. The frame includes sides A, B, and C, covering the surrounding area of ​​the object under test 1021. All first antennas 1011 are located on the inner wall of the first bracket 10, i.e., side C, close to the surface of the recessed area. All second antennas 1012 are located at the edges of the first bracket 10, i.e., sides A and B, enhancing the coverage. Sides D and F are auxiliary sides. In some embodiments, sides A and B of the first bracket 10 can be achieved using walls, while side C can be a side extending from the corner formed by two walls towards the ground (i.e., side C is perpendicular to the ground).

[0069] In some optional embodiments of this utility model, reference is made to Figure 7 and Figure 8 The first support 10 is an insulating support.

[0070] The first support 10 is an insulating support, which is a support with insulation and long-term resistance to chemical corrosion, as well as wear resistance, impact resistance, and resistance to mechanical, thermal shock, and stress. These characteristics can protect the antenna installed on it from interference and damage from the external environment.

[0071] Figure 9 This is a schematic diagram of a three-dimensional antenna arrangement provided in another embodiment of this utility model. (See attached diagram.) Figure 9As shown, in some optional embodiments of this utility model, the object to be measured 1021 is located on the shelf 30 or on the production line; the position information detection system also includes a second support 20;

[0072] The location information detection system includes multiple second antennas 1012; all first antennas 1011 and all second antennas 1012 are located on the second support 20;

[0073] At least one first antenna 1011 and at least one second antenna 1012 are located on the third side A1 of the shelf 30 or the production line and are arranged along the second direction y; wherein, the second direction y is the arrangement direction of each layer of the shelf 30, or is a direction perpendicular to the plane of the production line.

[0074] At least two second-side rails 1012 are located on the fourth side A2 of the shelf 30 or production line and are arranged along the second direction y; wherein the fourth side A2 of the shelf 30 or production line is opposite to the third side A1 of the shelf 30 or production line.

[0075] At least two second antennas 1012 are located on the fifth side A3 of the shelf 30 or production line and are arranged in an array; wherein the fifth side A3 of the shelf 30 or production line is opposite to the plane on which the shelf 30 or production line is located and is adjacent to the third side A1 of the shelf 30 or production line.

[0076] The location information detection system includes multiple secondary antennas 1012, with a maximum of three, all mounted on a second bracket 20. The object under test 1021 is located on a shelf 30 or production line. All antennas are positioned horizontally above the production line, forming a continuous signal coverage band. This ensures blind-spot-free signal coverage regardless of whether the object under test 1021 is on the shelf 30 or the production line. The second bracket 20 serves as the antenna mounting platform, ensuring precise spatial positioning of each antenna. First, the first antenna 1011 and at least one secondary antenna 1012 can be arranged linearly along the third side A1 of the shelf 30 or production line, along the second direction y, forming the main detection surface. At least two secondary antennas 1012 are located on the fourth side A2 of the shelf 30 or production line, also linearly arranged along the second direction y, forming a spatially opposite surface to the third side A1, such as front and back facing each other. This constructs a symmetrical detection area, eliminating blind spots on one side. At least two second antennas 1012 are located on the fifth side A3 of the shelf 30 or production line, arranged in a two-dimensional array, orthogonal to the plane of the shelf 30 or production line and adjacent to the third side A1, such as the top or bottom. This achieves a three-dimensional layout, suitable for scenarios requiring precise positioning such as smart warehousing and unmanned retail, enabling three-dimensional positioning of items on the shelf and trajectory tracking of objects. In some optional embodiments, the first antenna 1011 can be set on the third side A1 and the fourth side A2, or it can be set on the third side A1, the fourth side A2 and the fifth side A3.

[0077] In some optional embodiments of this utility model, reference continues to be made. Figure 9 When the object under test 1021 is located on the shelf 30, the first antenna 1011 and the second antenna 1012 are located on the third side A1 of the shelf 30;

[0078] The height of the first antenna 1011 from the plane where the shelf 30 is located is greater than or equal to one-third of the total height of the shelf 30, and less than one-half of the total height of the shelf 30;

[0079] The height of the second antenna 1012 located on the third side A1 of the shelf 30 from the plane on which the shelf 30 is located is greater than or equal to one-half of the total height of the shelf 30 and less than or equal to two-thirds of the total height of the shelf 30.

[0080] Two secondary antennas 1012 are located on the fourth side A2 of the shelf 30; the height of one secondary antenna 1012 located on the fourth side A2 of the shelf 30 from the plane on which the shelf 30 is located is greater than or equal to one-third of the total height of the shelf 30 and less than one-half of the total height of the shelf 30; the height of the other secondary antenna 1012 located on the fourth side A2 of the shelf 30 from the plane on which the shelf 30 is located is greater than or equal to one-half of the total height of the shelf 30 and less than or equal to two-thirds of the total height of the shelf 30.

[0081] The shelf 30 has multiple sides. The first antenna 1011 is located on the third side A1 of the shelf 30. Its height from the bottom surface of the shelf 30 is greater than or equal to one-third of the total height of the shelf 30 and less than one-half of the total height. The second antenna 1012 is also located on the third side A1 of the shelf 30, on the same side as the first antenna 1011, with a height range greater than or equal to one-half of the total height of the shelf 30 and less than two-thirds of the total height. Two second antennas 1012 are located on the fourth side A3 of the shelf 30, at different heights. The first second antenna 1012 has a height range greater than or equal to one-third of the total height of the shelf 30 and less than one-half of the total height, the same height range as the first antenna 1011 on the third side A1. The second second antenna 1012 has a height range greater than or equal to one-half of the total height of the shelf 30 and less than two-thirds of the total height, the same height range as the second antenna 1012 on the third side A1. On the third side A1, the first antenna 1011 and the second antenna 1012 are installed, covering the lower and upper middle sections respectively. On the fourth side A2, two second antennas 1012 are installed, with the same height distribution as the antennas on the third side A1, but located on a different side. By installing antennas on different sides and at different heights, full coverage of all layers of the shelf 30 is ensured, avoiding blind spots. This also results in a more uniform antenna arrangement on the third side A1 and the fourth side A2 of the shelf 30, avoiding interference between antennas, ensuring the stability and reliability of signal transmission, and reducing interference and maintenance costs.

[0082] like Figure 7 , Figure 8 and Figure 9 As shown, when the reader 101 has multiple antennas (at least one first antenna 1011 and multiple second antennas 1012), the movement direction of the object under test 1021 can be determined more accurately based on the signal strength relationship of the feedback signals received by each first antenna 1011 and each second antenna 1012. Furthermore, the distance between each first antenna 1011 and the object under test 1021 can be determined based on the transmission duration of each feedback signal, as well as the distance between each second antenna 1012 and the object under test 1021. Since the positions of each first antenna 1011 and each second antenna 1012 are fixed, the movement distance of the object under test 1021 can be determined based on multiple distance relationships and the possible movement trajectory of the object under test 1021 on the production line or shelf.

[0083] For example, such as Figure 9As shown, the host computer 103 can determine the distance between the first antenna 1011 and the object under test 1021 based on the transmission duration of the feedback signal received by the first antenna 1011 located on the third side A1 of the shelf 30, and determine the distance change between the second antenna 1012 located on the third side A1 of the shelf 30 and the object under test 1021 based on the transmission duration of the feedback signal received by the second antenna 1012 located on the third side A1 of the shelf 30. Then, the moving distance of the object under test 1021 in the direction from the third side A1 to the fourth side A2 can be determined based on the antenna located on the third side A1 of the shelf 30, and the moving distance of the object under test 1021 in the direction from the sixth side to the seventh side of the shelf can also be determined. The sixth side and the seventh side are opposite each other, and the sixth side is adjacent to the third side A1 and the fourth side A2 respectively, and the seventh side is adjacent to the third side A1 and the fourth side A2 respectively. Similarly, the distance that the measured object 1021 moves in the direction (i.e., the height direction of the shelf) along the plane of the shelf 30 can be determined based on the distance change between the second antenna 1012 located on the fifth side A3 of the shelf 30 and the measured object 1021, and thus the distance that the measured object 1021 moves on the shelf 30 can be determined.

[0084] In some optional embodiments of this utility model, reference continues to be made. Figure 9 The second support 20 is an insulating support.

[0085] The second bracket 20 is an insulating bracket that can protect the antenna installed on it from interference and damage from the external environment.

[0086] In some optional embodiments of this utility model, the location information detection system further includes an alarm;

[0087] The host computer 103 is connected to the alarm. The host computer 103 is configured to send an alarm control signal to the alarm when the difference between the position coordinates of the measured object 1021 and the preset coordinates in the preset trajectory corresponding to the measured object 1021 exceeds a preset threshold. The alarm is configured to issue an alarm message when it receives the alarm control signal.

[0088] The host computer 103 receives the real-time position coordinates of the object 1021 under test. It can preset the movement trajectory of items with RFID tags and calculate the positional relationship between the object and each first antenna 1011 and each second antenna 1012 under normal circumstances, according to preset rules. The host computer 103 compares the actual coordinates of the current object 1021 with the corresponding preset coordinates in the preset trajectory. If the difference between the position coordinates of the object 1021 and the preset coordinates in the corresponding preset trajectory exceeds a preset threshold, the movement of the item can be considered "deviation." The host computer 103 generates an alarm control signal and sends it to the alarm device. After receiving the signal, the alarm device executes preset alarm actions, such as sounding a horn and flashing a red light. By comparing the position coordinates with the preset trajectory, the movement process of the object 1021 under test is controlled. When an abnormal deviation is detected, the alarm device alerts the user, ensuring the reliability of production, logistics, or safety management.

[0089] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A location information detection system, characterized in that, The application relates to a position information detection system. The system comprises a reader and a host computer. The reader comprises at least one first antenna and at least one second antenna. The first and second antennas are arranged around a production line or a shelf, and at least one object to be detected is arranged on the production line or the shelf.

2. The position information detection system according to claim 1, characterized by The object to be detected is attached with a radio frequency identification tag.

3. The position information detection system according to claim 2, characterized by The reader is connected to the host computer. The reader is configured to transmit at least two signals to the radio frequency identification tag of the object to be detected through the first antenna, and receive feedback signals of the radio frequency identification tag of the object to be detected through all the first and second antennas after each signal transmission.

4. The position information detection system according to claim 3, characterized by The host computer is configured to determine position information of the object to be detected according to the feedback signals of each first and second antenna. The position information comprises at least one of position coordinates, a moving direction and a moving distance of the object to be detected. The object to be detected is arranged on the production line or the shelf, and all the first and second antennas are arranged on a detection platform. All the first and second antennas are arranged along a first direction.

5. The position information detection system according to claim 1, wherein The first direction is an extension direction of the production line or the shelf. Alternatively, all the first and second antennas are arranged along an arc shape. When all the first and second antennas are arranged along the first direction, all the first and second antennas are arranged on the same side of the production line. Alternatively, part of the first and second antennas are arranged on a first side of the production line, and the other part of the first and second antennas are arranged on a second side of the production line.

6. The position information detection system according to claim 5, characterized by The first side is opposite to the second side.

7. The position information detection system according to claim 1, wherein Alternatively, part of the first and second antennas are arranged on a first side of the production line, and the other part of the first and second antennas are arranged on a second side of the production line. The position information detection system further comprises a first support. The first support is arranged at least partially around the production line or the shelf. All the first antennas are arranged on an inner wall of the first support. The center of the inner wall of the first support is recessed relative to the edge of the inner wall. All the second antennas are arranged on the edge of the first support. Alternatively, part of the second antennas are arranged on the edge of the first support, and the other part of the second antennas are arranged on the inner wall of the first support. The first support is an insulating support. The object to be detected is arranged on the shelf or the production line. The position information detection system further comprises a second support. The position information detection system comprises a plurality of second antennas. All the first and second antennas are arranged on the second support. At least one first antenna and at least one second antenna are arranged on a third side of the shelf or the production line along a second direction. The second direction is a direction perpendicular to a plane in which the production line is arranged. At least two of the second antennas are located on a fourth side of the shelf or production line and are arranged along the second direction; wherein the fourth side of the shelf is opposite to the third side of the shelf; and the fourth side of the production line is opposite to the third side of the production line. At least two of the second antennas are located on a fifth side of the shelf or production line and are arranged in an array; wherein the fifth side of the shelf is opposite to the plane on which the shelf is located and is adjacent to the third side of the shelf; and the fifth side of the production line is opposite to the plane on which the production line is located and is adjacent to the third side of the production line.

8. The position information detection system according to claim 7, characterized by When the measured object is located on the shelf, the first antenna and one of the second antennas are located on the third side of the shelf. The height of the first antenna from the plane on which the shelf is located is greater than or equal to one third of the total height of the shelf and less than one half of the total height of the shelf. The height of the second antenna located on the third side of the shelf from the plane on which the shelf is located is greater than or equal to one half of the total height of the shelf and less than or equal to two thirds of the total height of the shelf. Two of the second antennas are located on the fourth side of the shelf; one of the second antennas located on the fourth side of the shelf has a height from the plane on which the shelf is located that is greater than or equal to one third of the total height of the shelf and less than one half of the total height of the shelf; and the other second antenna located on the fourth side of the shelf has a height from the plane on which the shelf is located that is greater than or equal to one half of the total height of the shelf and less than or equal to two thirds of the total height of the shelf.

9. The position information detection system according to claim 7, characterized by The second support is an insulating support.

10. The position information detection system according to any one of claims 1 to 9, characterized by, The position information detection system further comprises an alarm. The upper computer is connected to the alarm, and the upper computer is configured to send an alarm control signal to the alarm when the difference between the position coordinates of the measured object and the preset coordinates in the preset track corresponding to the measured object exceeds a preset threshold, and the alarm is configured to send an alarm information when receiving the alarm control signal.

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