Positioning method and device, storage medium and computer program product

Abstract

The invention provides a positioning method and device, a storage medium and a computer program product, and the method comprises the steps: obtaining a first power value, and carrying out the inventory operation of label information based on the first power value; under the condition that the first reference tag information and the second reference tag information are stored, the first tag information stored by the first exciter antenna equipment is positioned in the first area, the first reference tag information is a reference tag deployed at a first position farthest from the first exciter antenna equipment in the first area, and the second reference tag information is a reference tag deployed at a second position farthest from the first exciter antenna equipment in the first area; the second reference tag information is a reference tag deployed at a second position farthest from the first exciter antenna equipment and the reader antenna equipment in the first area.

Description

Technical Field

[0001] The present application relates to the technical field of Internet of Things, and in particular to a positioning method, device, storage medium and computer program product. Background Art

[0002] In the field of positioning systems, there are many related technologies, including Bluetooth positioning, Wi-Fi positioning, ultra-wideband (UWB) positioning, and radio-frequency identification (RFID) positioning. RFID positioning technology is currently a hot topic in indoor positioning research due to its advantages in cost, accuracy, and complexity, and is applied to enterprise management, asset tracking, warehouse positioning, and other fields.

[0003] However, under the separate RFID reader architecture, antenna-level positioning technology can only achieve coarse positioning by estimating the coverage radius, but it is difficult to achieve more accurate regional-level positioning, and is difficult to use for regional inventory in applications such as actual inventory counting. Summary of the invention

[0004] In view of this, embodiments of the present application hope to provide a positioning method, device, storage medium and computer program product, which can complete the regional level positioning of tag information in a separated architecture.

[0005] The technical solution of this application is implemented as follows:

[0006] In a first aspect, the present application provides a positioning method, applied to a first exciter antenna device, the method comprising:

[0007] Acquire a first power value, and perform an inventory operation on the tag information based on the first power value;

[0008] When the first reference tag information and the second reference tag information are stored, the first tag information stored in the first exciter antenna device is located in the first area, wherein the first reference tag information is a reference tag deployed at a first position farthest from the first exciter antenna device in the first area, and the second reference tag information is a reference tag deployed at a second position farthest from the first exciter antenna device and the reader antenna device in the first area.

[0009] In a second aspect, the present application provides a positioning device, the device comprising:

[0010] an acquiring unit, configured to acquire a first power value, and perform an inventory operation on the tag information based on the first power value;

[0011] A positioning unit is used to locate the first tag information stored in the first exciter antenna device within the first area when the first reference tag information and the second reference tag information are stored, wherein the first reference tag information is a reference tag deployed at a first position farthest from the first exciter antenna device in the first area, and the second reference tag information is a reference tag deployed at a second position farthest from the first exciter antenna device and the reader antenna device in the first area.

[0012] In a third aspect, the present application provides a positioning device, comprising: a processor and a memory; the above positioning method is implemented when the processor executes a running program stored in the memory.

[0013] In a fourth aspect, the present application provides a storage medium having a computer program stored thereon, which implements the above-mentioned positioning method when executed by a processor.

[0014] In a fifth aspect, the present application provides a computer program product, including a computer program, which implements the above-mentioned positioning method when executed by a processor.

[0015] The present application provides a positioning method, device, storage medium and computer program product, the method comprising: obtaining a first power value, and performing an inventory operation on tag information based on the first power value; when the first reference tag information and the second reference tag information are inventoried, locating the first tag information inventoried by the first exciter antenna device within the first area, wherein the first reference tag information is a reference tag deployed at a first position farthest from the position of the first exciter antenna device in the first area, and the second reference tag information is a reference tag deployed at a second position farthest from the first exciter antenna device and the reader antenna device in the first area. By adopting the above-mentioned implementation scheme, a small number of reference tag information are set in the first area, such as the first reference tag information and the second reference tag information, and the first power value when the tag information is inventoried is obtained, and the first reference tag information and the second reference tag information are inventoried using the first power value. Since the locations where the first reference tag information and the second reference tag information are set are farthest from the first exciter antenna device and the first exciter antenna device and the reader antenna device, they are more difficult to be inventoried. Therefore, it is possible to determine whether the tag information in the first area is inventoried based on whether the first reference tag information and the second reference tag information are inventoried, and further record the location of the inventoried first tag information. Therefore, this method can effectively determine the regional location information of the tag information in the first area, and realize regional-level positioning of the tag information. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of an integrated RFID reader architecture;

[0017] Figure 2 It is a schematic diagram of a separate RFID reader architecture;

[0018] Figure 3 A schematic diagram of a positioning method provided in an embodiment of the present application Figure 1 ;

[0019] Figure 4 A schematic diagram of an RFID reader inventory process provided in an embodiment of the present application;

[0020] Figure 5 A schematic diagram of a positioning method provided in an embodiment of the present application Figure 2 ;

[0021] Figure 6 A schematic diagram of the structure of a positioning device provided in an embodiment of the present application Figure 1 ;

[0022] Figure 7 A schematic diagram of the structure of a positioning device provided in an embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0023] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the technical solution of the present application is further elaborated in detail below in combination with the drawings and specific embodiments of the specification. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0024] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meaning as those commonly understood by those skilled in the art to which the present application belongs. The terms used in the embodiments of the present application are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0025] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict. It should also be noted that the terms "first / second / third" involved in the embodiments of the present application are only used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0026] In the field of related positioning systems, there are many positioning methods, including Bluetooth positioning, Wi-Fi positioning, UWB positioning and RFID positioning. RFID positioning technology has certain advantages in cost, accuracy and complexity, and is currently a hot topic in indoor positioning research. The RFID system consists of a reader and a tag, where the reader can read and write multiple tags within the range at the same time, with high reading efficiency; the tag is small in size, large in capacity, and long in life, and the tag can be set in a variety of styles to meet the needs of different scenarios.

[0027] At the same time, RFID technology can work in a non-contact, non-visual state to identify objects that are far away from the reader or moving objects. The working principle of RFID technology is mainly: the reader transmits a signal of a certain frequency through the antenna, and the tag within the coverage range of the antenna is activated after receiving the signal; the tag reflects the signal with its own identity (Identifier, ID) information to the reader through backscattering; the reader modulates and decodes the signal transmitted by the tag, and sends it to the system for corresponding instruction execution.

[0028] At present, RFID readers include two types: separate and integrated. In the integrated architecture, such as Figure 1 As shown, the antenna for transmitting signal to stimulate the tag and the antenna for receiving the tag reflected signal are the same; in the separated architecture, such as Figure 2 As shown, there are two devices, one for transmitting signals to stimulate the tag and the other for receiving signals reflected from the tag.

[0029] Common parameters used in RFID-based positioning algorithms include: time, phase, received signal strength indication (RSSI), etc. In addition to the above commonly used ranging positioning parameters, in actual applications, there are also a large number of antenna-level coarse positioning requirements, that is, the location of the tag is determined by which antenna the tag is read by, so as to achieve antenna-level positioning of the tag.

[0030] When positioning, the user's requirement is that the antenna set in each area can and only read the cargo label information in that area, and cannot miss the cargo label information in that area, nor can it misread the cargo label information in other areas. In this way, the user can confirm which area the cargo is in through the unique matching relationship between the label and the antenna. However, the difficulty of this problem is that if the antenna's transmission power is too large, some cargo label information will be excited by multiple antennas at the same time, and under the separated architecture, the relationship between RSSI and the distance of the excited antenna is not monotonic, and the area cannot be simply determined by comparing the RSSI value; if the antenna transmission power is too small, some cargo label information in the area cannot be counted. Due to changes in the environment and inconsistent areas in different areas, the power is difficult to calculate a priori and needs to be dynamically adjusted according to actual conditions.

[0031] In an integrated architecture, only one antenna interacts with the tag, so it is only necessary to discuss whether the coverage radius of one antenna overlaps with the coverage radius of other antennas. However, in a separate architecture, the communication path of the excitation signal and the feedback signal is uncertain, involving the coverage radius of the exciter antenna and the reader antenna. The situation will be more complicated, which makes it difficult to directly use the wireless positioning method in the related technology for positioning problems under the separate architecture.

[0032] It can be seen that the RFID positioning technology in the related technology still has the following shortcomings:

[0033] (1) The antenna-level positioning technology in the related art can only achieve coarse positioning by estimating the coverage radius, but cannot achieve more accurate regional-level positioning. It is difficult to use it for regional inventory in actual inventory counting and other applications.

[0034] (2) The RSSI variation under the separated architecture is different from that under the integrated architecture. The estimation method of the antenna coverage under the integrated architecture is difficult to apply to the separated architecture.

[0035] In order to solve the above technical problems, the present application provides a positioning method, such as Figure 3 As shown, applied to a first exciter antenna device, the method may include:

[0036] S301: Acquire a first power value, and perform an inventory operation on tag information based on the first power value.

[0037] In the embodiment of the present application, the method of obtaining the first power value can be implemented in the following manner:

[0038] Obtain a first signal strength parameter value of the first reference tag information and a second signal strength parameter value of the second reference tag information; obtain a first energy value required to activate the tag information and a second energy value required to inventory the tag information; determine a first path loss value based on the first signal strength parameter value; and determine a second path loss value based on the second signal strength parameter value; determine a first power value based on the first energy value, the first path loss value, the second energy value, and the second path loss value.

[0039] In the embodiment of the present application, the first reference tag information may be represented by A1, and the second reference tag information may be represented by A2.

[0040] In the embodiment of the present application, A1 is a reference tag deployed in the inventory area and is farthest from the first exciter antenna device, and A2 is a reference tag deployed in the inventory area and is farthest from the first exciter antenna device and the reader antenna device.

[0041] In the embodiment of the present application, the first signal strength parameter value and the second signal strength parameter value may be RSSI values.

[0042] In the embodiment of the present application, the first energy value is the minimum energy value required to activate the tag information. The minimum energy value can be expressed as a express.

[0043] In the embodiment of the present application, the second energy value is the minimum energy value at which the tag information can be read by the reader antenna device. The minimum energy value can be expressed as P r express.

[0044] In the embodiment of the present application, the first path loss value can be PL A1 Indicates that the second path loss value can be used PL A2 express.

[0045] In the embodiment of the present application, obtaining the RSSI value of the first reference tag information and the RSSI value of the second reference tag information can be achieved by:

[0046] The power value of the first exciter antenna device is adjusted to a maximum value P, and each reference tag information is excited with the maximum value P, and the signal strength RSSI value of the first reference tag information and the signal strength RSSI value of the second reference tag information are respectively obtained.

[0047] In the embodiment of the present application, the PL in the current environment is calculated based on the RSSI value of the tag received by the first reference tag information A1 in the inventory area. A1 , PL A1 Indicates the maximum path loss value of label-stimulated downlink transmission.

[0048] In the embodiment of the present application, the PL in the current environment is calculated based on the RSSI value of the tag received by the second reference tag information A2 in the inventory area. A2 , PL A2 Indicates the maximum path loss value of label-stimulated uplink and downlink transmission.

[0049] In the embodiment of the present application, according to the minimum energy value P required to activate the tag information a and the first path loss value PL A1 , calculate the minimum power value P required to activate all tags in the inventory area i1 .

[0050] In the embodiment of the present application, the minimum energy value P that can be read by the reader antenna device according to the tag information r and the second path loss value PL A2 , calculate the minimum power value P required to activate all tags in the inventory area and be read by the reader i2 .

[0051] In the embodiment of the present application, according to P i1 and P i2 The minimum power value required to further determine that all tag information in the inventory area is read is: P min =max{P i1 ,P i2}, which is the first power value determined in the embodiment of the present application.

[0052] In the embodiment of the present application, P is obtained min Afterwards, the first exciter antenna device uses P min Send a signal based on the P min Take inventory of the label information in the inventory area.

[0053] S302: When the first reference tag information and the second reference tag information are stored, locate the first tag information stored by the first exciter antenna device within the first area.

[0054] Among them, the first reference tag information is the reference tag deployed at the first position farthest from the first exciter antenna device in the first area, and the second reference tag information is the reference tag deployed at the second position farthest from the first exciter antenna device and the reader antenna device in the first area.

[0055] In the embodiment of the present application, the first area is the inventory area corresponding to the label information.

[0056] In an embodiment of the present application, the first reference tag information is set at a position farthest from the first exciter antenna device in the inventory area, and the second reference tag is set at a position where the product of the distances from the first exciter antenna device and the reader antenna device is the largest.

[0057] In the embodiment of the present application, since the first reference tag information is set at the farthest distance from the exciter antenna device and is most difficult to be excited, and the second reference tag information is set at the point where the product of the distances from the first exciter antenna device and the reader antenna device is the largest, and is most difficult to be excited and inventoried, it is first determined whether the first reference tag information and the second reference tag information in the inventory area are all inventoried. When the first reference tag information and the second reference tag information are inventoried, all the first tag information in the inventory area will be inventoried, and the first tag information in the first area that has been inventoried will be positioned within the inventory area, thereby achieving the correspondence between the first tag information and the inventory area.

[0058] It can be understood that a positioning method provided by an embodiment of the present application sets a small number of reference tag information in the first area, such as the first reference tag information and the second reference tag information, and obtains the first power value when inventorying the tag information, and uses the first power value to inventory the set first reference tag information and the second reference tag information. Because the locations where the first reference tag information and the second reference tag information are set are farthest from the first exciter antenna device and the first exciter antenna device and the reader antenna device, they are more difficult to be inventoryed. Therefore, it is possible to determine whether the tag information in the first area is inventoried based on whether the first reference tag information and the second reference tag information are inventoried, and further record the location of the inventoried first tag information. Therefore, this method can effectively determine the regional location information of the tag information in the first area, and realize regional-level positioning of the tag information.

[0059] In one embodiment of the present application, after performing an inventory operation on the tag information based on the first power value, if the first reference tag information and / or the second reference tag information is not inventoried, the first power value is adjusted to obtain an adjusted first power value; and the tag information is re-inventoryed using the adjusted first power value.

[0060] In an embodiment of the present application, since the first reference label information and the second reference label information are set at a position in the first area that is difficult to inventory, if the first reference label information and / or the second reference label information in the first area are not inventoried using the first power value, it means that the adopted first power value may be too small, resulting in the first reference label information and the second reference label information being unable to be inventoried, and the first power value needs to be further adjusted to ensure that all label information in the first area can be inventoried.

[0061] In an embodiment of the present application, the first power value is adjusted to obtain the adjusted first power value, which can be achieved in the following manner:

[0062] Obtain a third signal strength parameter value of the third reference tag information and a fourth signal strength parameter value of the fourth reference tag information, wherein the third reference tag information is a reference tag deployed at a third position closest to the first exciter antenna device outside the first area, and the fourth reference tag information is a reference tag deployed at a fourth position closest to the first exciter antenna device and the reader antenna device outside the first area; determine a second power value of the inventory tag information based on the third signal strength parameter value and the fourth signal strength parameter value; and adjust the first power value based on the second power value to obtain the adjusted first power value.

[0063] In the embodiment of the present application, the third reference tag information may be represented by B1, and the fourth reference tag information may be represented by B2.

[0064] In the embodiment of the present application, the first area may be an inventory area.

[0065] In the embodiment of the present application, B1 is a reference tag deployed outside the inventory area and closest to the first exciter antenna device, and B2 is a reference tag deployed outside the inventory area and closest to the first exciter antenna device and the reader antenna device.

[0066] In the embodiment of the present application, the third signal strength parameter value and the fourth signal strength parameter value may be RSSI values.

[0067] In the embodiment of the present application, the second power value can be expressed as P max .

[0068] In the embodiment of the present application, the RSSI value of the third reference tag information and the RSSI value of the fourth reference tag can be obtained in the same manner as the RSSI value of the first reference tag information and the RSSI of the second reference tag information. Specifically, the power value of the first exciter antenna device is adjusted to a maximum value P, and each reference tag information is stimulated with the maximum value P to obtain the RSSI value of the third reference tag information and the RSSI value of the fourth reference tag, respectively.

[0069] In the embodiment of the present application, the third path loss value in the current environment is calculated according to the RSSI value of the tag received by the third reference tag information B1 outside the inventory area. The third path loss value can be expressed as PL B1 Indicates that PL B1 It can also be understood as the minimum path loss value of the tag-inspired downlink transmission.

[0070] In the embodiment of the present application, the fourth path loss value in the current environment is calculated according to the RSSI value of the tag received by the fourth reference tag information B2 outside the inventory area. The fourth path loss value can be expressed as PL B2 Indicates that PL B2 It can also be understood as the minimum path loss value for uplink and downlink transmissions stimulated by the label.

[0071] In the embodiment of the present application, according to the minimum energy value P required to activate the tag information obtained a and the third path loss value PL B1 , calculate the minimum power value P required to activate the third reference tag information closest to the inventory area o1 .

[0072] In the embodiment of the present application, the minimum energy value P that can be read by the reader antenna device according to the acquired tag information r and the fourth path loss value PL B2 , calculate the minimum power value P required to activate the fourth reference tag information with the lowest loss outside the inventory area and be read by the reader antenna device o2 .

[0073] In the embodiment of the present application, further according to P o1 and P o2 The maximum power required to ensure that no tag information outside the inventory area is read is: P max =max{P o1 ,P o2}, which is the second power value determined in the embodiment of the present application.

[0074] In the embodiment of the present application, the first power value is adjusted based on the second power value to obtain the adjusted first power value, which can be adjusted in the following manners, specifically:

[0075] For the exciter antenna device (including the first exciter antenna device) that cannot completely read the first reference tag information and the second reference tag information in the inventory area using the first power value, the power of the exciter antenna device is adjusted using the dichotomy method. If P min <P max , then the binary selection interval is [P min ,P max ]; if P min >P max , then the binary selection interval is [P min ,P], where P is the maximum value of the power value adjustment of the first exciter antenna device.

[0076] In the embodiment of the present application, the first power value is adjusted in the above manner, and after the adjusted first power value is obtained, the inventory operation of the tag information is re-executed using the adjusted first power value.

[0077] It should be noted that the first power value is adjusted until the conditions are met that only reference tag information within the inventory area can be inventoried and / or that the second exciter antenna device corresponding to the reference tag information outside the inventory area can only inventory reference tag information outside the area.

[0078] In an embodiment of the present application, after the first tag information stored in the first exciter antenna device is located in the first area, the following process may be further performed:

[0079] Determine whether the third reference tag information and the fourth reference tag information are inventoried, wherein the third reference tag information is a reference tag deployed at a third position closest to the first exciter antenna device outside the first area, and the fourth reference tag information is a reference tag deployed at a fourth position closest to the first exciter antenna device and the reader antenna device outside the first area; if the third reference tag information and the fourth reference tag information are not inventoried, determine that the first tag information is tag information within the first area; if the third reference tag information and the fourth reference tag information are inventoried and there is no tag information identical to the first tag information in the second tag information inventoried by the second exciter antenna device outside the first area corresponding to the third reference tag information and the fourth reference tag information, determine that the first tag information is tag information within the first area.

[0080] In the embodiment of the present application, in order to ensure that the accuracy of the first tag information located in the first area is higher, further judgment may be performed by referring to the third reference tag information and the fourth reference tag information.

[0081] In the embodiment of the present application, the first exciter antenna device adopts P min After sending the signal, after filtering out the first reference label information and the second reference label information that can be read in the inventory area, it is possible to further determine whether the third reference label information and the fourth reference label information outside the inventory area are counted, and based on this, determine whether the corresponding first label information in the first area is accurate.

[0082] In an embodiment of the present application, if the first exciter antenna device stores the first reference tag information and the second reference tag information within the inventory area, and is unable to store the third reference tag information and the fourth reference tag information outside the inventory area, it is determined that the first tag information located within the first area is correct, that is, the located first tag information is the tag information within the first area, and the first tag information activated by the first exciter antenna device and the correspondence between the first tag information and the first area are recorded.

[0083] It should be noted that the first label information may be cargo label information.

[0084] It should be noted that the first area may be the storage area for acquiring the tag information.

[0085] In an embodiment of the present application, if the first exciter antenna device can store the first reference tag information and the second reference tag information in the inventory area, and can store the third reference tag information and the fourth reference tag information outside the inventory area, if the second exciter antenna device corresponding to the third reference tag information and the fourth reference tag information outside the inventory area can not only store the tag information outside the inventory area, but also store the tag information within the inventory area, in this case, if the second tag information stored by the second exciter antenna device does not contain the same tag information as the first tag information, that is, the second tag information stored by the second exciter antenna device does not overlap with the first tag information stored by the first exciter antenna device, then it indicates that the first tag information stored by the first exciter antenna device exists in the first area, and the correspondence between the first tag information in the first area and the first area is recorded. At the same time, the correspondence between the second tag information outside the first area and the second area can also be recorded.

[0086] In an embodiment of the present application, after determining whether the third reference tag information and the fourth reference tag information are stored, the following process may also be performed:

[0087] When the third reference label information and / or the fourth reference label information is inventoried, and the second label information is inventoried for the second exciter antenna device outside the first area corresponding to the third reference label information and the fourth reference label information, the second label information is removed from the first label information recorded in the first area.

[0088] In an embodiment of the present application, if the first exciter antenna device can inventory the first reference tag information and the second reference tag information within the inventory area, and can inventory the third reference tag information and the fourth reference tag information outside the inventory area, if the second exciter antenna device corresponding to the third reference tag information and the fourth reference tag information outside the inventory area can only inventory the tag information outside the inventory area, that is, all the second tag information inventoryed by the second exciter antenna device belongs to outside the inventory area, then the second tag information activated by the second exciter antenna device is recorded, the second tag information is removed from the first tag information, and the correspondence between the remaining tag information in the first tag information except the second tag information and the first area is recorded.

[0089] In an embodiment of the present application, after determining whether the third reference tag information and the fourth reference tag information are stored, the following process may also be performed:

[0090] When the third reference tag information and the fourth reference tag information are inventoried, and the second tag information inventoried by the second exciter antenna device outside the first area corresponding to the third reference tag information and the fourth reference tag information contains tag information that is identical to the first tag information, the first power value is adjusted to obtain an adjusted first power value; and the tag information is re-inventoryed using the adjusted first power value.

[0091] In an embodiment of the present application, if the first exciter antenna device can store the first reference tag information and the second reference tag information in the inventory area, and can store the third reference tag information and the fourth reference tag information outside the inventory area, if the second exciter antenna device corresponding to the third reference tag information and the fourth reference tag information outside the inventory area can not only store the tag information outside the inventory area, but also store the tag information within the inventory area, in this case, if the second tag information stored by the second exciter antenna device contains tag information that is the same as the first tag information, that is, the second tag information stored by the second exciter antenna device overlaps with the first tag information stored by the first exciter antenna device, then it indicates that the first power value is too large and the first power value needs to be further adjusted.

[0092] In the embodiment of the present application, when the first power value is adjusted in this process, for the same cargo tag information, the uplink is the same, and the downlink loss is mainly compared. First, the transmission power of the first exciter antenna device and the second exciter antenna device with a larger transmission power can be adjusted to the transmission power corresponding to the transmission power of the smaller transmission power, and the tag information is counted with the transmission power to compare whether the cargo tag information is still read at the same time. If not, the area to which the exciter antenna device corresponding to the acquired tag information belongs is recorded; if yes, the binary method is used, and the binary method value interval is [0,P min ] until the acquired tag information can only be stored by one exciter antenna device.

[0093] It can be seen from the above embodiments that in the regional positioning method proposed in the embodiments of the present application, in view of the customer's need to determine which goods are in which area or warehouse through an exciter antenna device in actual applications, combined with the networking conditions of the separate RFID, the exciter antenna device and the area are accurately matched by deploying reference tags and adaptively adjusting the transmitting antenna power, thereby realizing the positional relationship between the inventory of goods and the area.

[0094] Before implementing the technical solution in the embodiments of the present application, it is first necessary to determine the position of the reference tags within the inventory area and outside the inventory area and set them, that is, the reference tags include reference tags within the inventory area and reference tags outside the reference area, such as setting the first reference tag information and the second reference tag information within the inventory area, and setting the third reference tag information and the fourth reference tag information outside the inventory area.

[0095] In the embodiment of the present application, the position of the first reference label information and the position of the second reference label information in the inventory area need to be set at the position that is most difficult to be excited in the inventory area to ensure that the label can be read, which means that the label information of all goods in the inventory area can be counted. The position of the third reference label information and the position of the fourth reference label information outside the inventory area need to be set at the position that is most easily excited in the inventory area corresponding to other exciter antenna devices to ensure that the third reference label information and the fourth reference label information cannot be counted, which means that the label information of goods outside the first area cannot be counted.

[0096] In the embodiment of the present application, the tag information receives the continuous wave sent by the reader antenna device, and loads the data return signal on this basis. The energy loss can be divided into two parts: the downlink path loss value of the exciter antenna device-tag information and the uplink path loss value of the tag information-reader antenna device, such as Figure 4 Assume that the power required for the tag information to be activated by the exciter antenna device is P a , the power required by the reader antenna device to read the tag information is P r , the power emitted by the exciter antenna device is P t , the downlink transmission loss is PL1, and the uplink transmission loss is PL2, then: For any tag information A in the inventory area, it is necessary to simultaneously meet the two conditions in the following formula (1):

[0097]

[0098] For any tag B outside the inventory area, the following two conditions in formula (2) must be met at the same time:

[0099]

[0100] In the embodiment of the present application, the specific manner of setting the first reference tag information, the second reference tag information, the third reference tag information and the fourth reference tag information is as follows:

[0101] (1) Reference label type setting:

[0102] Based on the above formula, it can be seen that the received power (P) of the reference tag needs to be obtained. During the actual measurement, this indicator is reflected by RSSI. The conversion method between RSSI and P is shown in the following formula (3):

[0103] RSSI = 10log 10 (P) (3)

[0104] Wherein, P represents the power value.

[0105] Currently, ordinary tag information cannot collect tag information receiving RSSI values, so obtaining RSSI values ​​requires special requirements for ordinary tag information.

[0106] The ordinary tag information memory is divided into four independent storage blocks (Bank): Reserved, EPC (Electronic Product Code), TID (Tag Identification Number) and User. The ordinary tag information needs to be improved. User-defined data can be written in the User area. The calculated signal strength RSSI of the tag information received can be written into the User area and fed back to the receiver antenna.

[0107] (2) Reference tag deployment location settings:

[0108] ① The derivation process of determining the reference tag position based on whether the reference tag is activated:

[0109] The electromagnetic wave energy received by the reference tag information from the exciter antenna device can be expressed as the following formula (4):

[0110]

[0111] Among them, P tag-Rx is the received energy of the reference tag information, P Tx is the signal energy emitted by the exciter antenna device, G Tx , G tag are the signal gains of the exciter antenna device and the reference tag information antenna respectively, L is the channel attenuation coefficient, d1 is the communication distance between the reference tag information and the exciter antenna device, and λ is the wavelength.

[0112] The relationship between energy P and RSSI can be expressed as the following formula (5):

[0113]

[0114] Based on the above formulas (4) and (5), the reference tag information at a fixed position can be obtained. The power of the exciter antenna device is adjusted to the maximum, and the reference tag is read once to obtain the RSSI value of the reference tag. According to the received signal strength RSSI value of the reference tag information and the antenna transmission power, the path loss value PL can be calculated, as shown in formula (6):

[0115] PL = 10log 10 P Tx -RSSI (6)

[0116] Among them, P Tx It is the signal energy transmitted by the exciter antenna device.

[0117] In the embodiment of the present application, it is deduced from the previous item that when the power range of the exciter antenna device needs to be calculated based on the path loss value PL, the path loss value and the power value P required for the excitation tag are calculated. a , the expected power P' required to activate or deactivate a reference tag information can be calculated Tx , as shown in formula (7):

[0118]

[0119] It should be noted that P' Tx In the calculation of , the path loss PL is combined with P a Convert it to RSSI value and substitute it into the above formula (7) to calculate.

[0120] Where k represents the fiber loss, and RSSI′ is the expected RSSI value of the reference tag information at a known location.

[0121] The tasks of the above formulas (1) and (2) are transformed into finding the reference tag information deployed at a certain location, so that the activation difficulty is the greatest within the inventory area, that is, the path loss value is the greatest, that is, the RSSI value is the smallest; and the activation difficulty is the least outside the inventory area, that is, the path loss value is the smallest, that is, the RSSI value is the largest.

[0122] By combining the above formulas (3) and (4), the calculation formula between RSSI and distance is shown in formula (8):

[0123]

[0124] Among them, RSSI0 is the RSSI value of the tag information at the known position d0, and n is the path loss factor.

[0125] From the above formula (8), it can be seen that the RSSI value received by the tag information at d1 is monotonically related to the distance between the tag information at d1 and the exciter antenna, that is, the reference tag information needs to be placed at the position farthest from the excitation antenna device in the inventory area and the position closest to the excitation antenna device outside the inventory area.

[0126] In the embodiment of the present application, the coordinate solution method of the deployed reference tag information can be through grid traversal and other methods, which are not specifically limited in the embodiment of the present application. For example, the following formula (9) represents the specific position of the reference tag A1 deployed in the inventory area at the farthest position from the exciter antenna device, and formula (10) represents the specific position of the reference tag B1 deployed outside the inventory area at the closest position to the exciter antenna device:

[0127]

[0128]

[0129] Among them, (x A1 ,y A1 ) is within the inventory area of ​​the exciter antenna device, (x B1 ,y B1 ) is the intersection of the maximum power coverage of the exciter antenna device and the inventory area of ​​other exciter antenna devices, x Tx and Tx It represents the location coordinate information of the corresponding exciter antenna device in the inventory area.

[0130] ② The derivation process of determining the reference tag position based on whether the reference tag is read:

[0131] Assume that the energy utilization rate of tag information is β, that is, P in the ideal state tag-Tx =βP tag-Rx , and in actual situations, the energy received by the reader antenna device can be expressed as formula (11):

[0132]

[0133] Among them, P reader-Tx is the energy emitted by the exciter antenna device, G reader-Tx is the signal gain of the exciter antenna device, G reader-Rx is the signal gain of the reader antenna device, G tag is the signal gain of the reference tag information antenna, L is the channel attenuation coefficient, λ is the wavelength, d1 is the communication distance between the reference tag information and the exciter antenna device, and d2 is the distance between the reference tag information and the reader antenna device.

[0134] It should be noted that the calculation process of the path loss value and the derivation process of other parameters can refer to the calculation process in the aforementioned embodiment, but the difference is that the uplink and downlink path loss values ​​or uplink and downlink calculation-related parameters need to be considered.

[0135] In the embodiment of the present application, the calculation formula between the RSSI value and the distance is shown in the following formula (12):

[0136]

[0137] Among them, P reader-Rx is the received energy of the reader antenna device, d1 is the communication distance between the exciter antenna device and the tag information, and d2 is the communication distance between the tag information and the reader antenna device. RSSI0 is the distance d from the exciter antenna. 01 , reader antenna distance d 02 The RSSI value of the virtual reference tag at a known location.

[0138] It can be seen from the above formula (12) that RSSI is negatively correlated with d1d2. When the product of d1d2 is larger, that is, the signal is closer to the midpoint of the exciter antenna device and the reader antenna device, the RSSI is smaller.

[0139] In the embodiment of the present application, the location of the reference tag can be determined according to the inventory area, and the coordinate solution method of the reference tag can be through grid traversal and other methods, which are not specifically limited in the embodiment of the present application. For example, the following formula (13) represents the specific location of the reference tag A2 deployed in the inventory area at the farthest position from the exciter antenna device and the reader antenna device, and formula (14) represents the specific location of the reference tag B2 deployed outside the inventory area at the closest position to the exciter antenna device and the reader antenna device:

[0140]

[0141]

[0142] Among them, (x A2 ,y A2 ) is within the inventory area of ​​the exciter antenna device, (x B2 ,y B2 ) is the intersection of the maximum power coverage of the exciter antenna device and the inventory area of ​​other exciter antenna devices, x Tx and Tx It represents the location coordinate information of the corresponding exciter antenna device in the inventory area.

[0143] In summary, it can be seen that for the excitation-reading process of a tag information, at least reference tags need to be deployed in the above four positions, that is, A1, A2, B1, and B2 are respectively deployed at the farthest distance from the exciter antenna device in the inventory area, the closest distance to the exciter antenna device outside the inventory area, the largest distance product between the exciter antenna device and the reader antenna device in the inventory area, and the smallest distance product between the exciter antenna device and the reader antenna device outside the inventory area.

[0144] It should be noted that other reference tags may be deployed as needed in an actual environment, and no specific limitation is made in the embodiments of the present application.

[0145] Based on the above embodiments, a flowchart of a positioning method is also provided in the embodiments of the present application. Figure 5 As shown, the specific steps include:

[0146] S1. Determine the networking environment, record the location of each reader antenna device, the location of each exciter antenna device, and the scope of the inventory area.

[0147] S2. For each exciter antenna device, calculate the position of the reference tag information inside and outside the inventory area according to the difficulty of activating the tag information.

[0148] S3. For each exciter antenna device, the positions of the reference tag information inside and outside the inventory area are calculated according to the ease with which the tag information is read.

[0149] S4. Deploy reference tag information at the determined corresponding position.

[0150] S5. When it is necessary to count the area corresponding to the cargo label information, adjust the power of the exciter antenna device to the maximum value, obtain the RSSI value of each reference label, and calculate the path loss value based on the RSSI value, and then calculate the power value range of the exciter antenna device that can only count the label information in the inventory area. For example [P min ,P max ].

[0151] S6. Adjust the power of the exciter antenna device to the calculated minimum power value. For example, P min .

[0152] S7. Determine whether all reference tag information in the inventory area has been inventoried. If so, execute S8; if not, execute S9.

[0153] S8. Determine whether the reference tag information outside the inventory area has been inventoried. If not, execute S10. If so, execute S11.

[0154] S9. Based on the calculated maximum power value and minimum power value, adjust the transmission power value of the exciter antenna device in a binary manner, re-inventory the tag information, and execute S7.

[0155] S10. Record the correspondence between the activated cargo label information and the inventory area.

[0156] S11, determine whether the cargo label information of the area where the reference label information to be inventoried is located has been recorded in other areas and the exciter antenna equipment in other areas can only inventory the cargo label information in this area or there is no cross-reading with other areas. If so, execute S10, if not, execute S12.

[0157] It should be noted that, if it is the first case in S11, the cargo label information recorded in other areas needs to be eliminated.

[0158] S12, using a binary method to reduce the transmission power of the exciter antenna device in the inventory area and the exciter antenna device outside the inventory area until the cargo label information to be read can only be read by one of the exciter antenna devices, and then executing S10.

[0159] Based on the above embodiments, a reference tag design method based on a separate architecture is proposed in the embodiments of the present application, and the difficulty points of tag excitation and reading under the separate architecture are calculated, effectively reducing the number of reference tags deployed in actual deployment; the proposed method of adaptive adjustment of the exciter antenna power, compared with the traditional binary method, effectively reduces the number of traversals and reliability; the tag information that can feedback RSSI is used as reference tag information, and conventional tags can still be used for cargo tags, thereby further increasing the amount of reference tag information without increasing warehouse management costs.

[0160] It can be seen that the embodiments of the present application have the following technical advantages compared with the related art:

[0161] (1) The embodiments of the present application are dedicated to solving the actual needs of customers and effectively addressing the problem that the antenna-level positioning method in the related art cannot meet the requirements of regional-level precise positioning in warehouse management.

[0162] (2) In the embodiments of the present application, fewer reference tags are required, which can reduce the cost of deploying reference tags.

[0163] (3) Compared with the conventional binary search method, the embodiments of the present application have fewer traversals, which can reduce energy consumption.

[0164] Based on the above embodiment, in another embodiment of the present application, a positioning device 1 is provided, such as Figure 6 As shown, the positioning device 1 includes:

[0165] The acquiring unit 10 is used to acquire a first power value and perform an inventory operation on the tag information based on the first power value.

[0166] The positioning unit 11 is used to locate the first tag information stored in the first exciter antenna device within the first area when the first reference tag information and the second reference tag information are stored, wherein the first reference tag information is a reference tag deployed at a first position farthest from the first exciter antenna device in the first area, and the second reference tag information is a reference tag deployed at a second position farthest from the first exciter antenna device and the reader antenna device in the first area.

[0167] In one embodiment, the positioning device 1 may further include: an adjustment unit and an inventory unit.

[0168] The adjustment unit is used to adjust the first power value to obtain the adjusted first power value when the first reference tag information and / or the second reference tag information is not stored.

[0169] The inventory unit is used to perform a re-inventory operation on the tag information using the adjusted first power value.

[0170] In one embodiment, the positioning device 1 may further include: a determination unit.

[0171] The acquisition unit 10 is also used to obtain a third signal strength parameter value of a third reference tag information and a fourth signal strength parameter value of a fourth reference tag information, wherein the third reference tag information is a reference tag deployed at a third position closest to the first exciter antenna device outside the first area, and the fourth reference tag information is a reference tag deployed at a fourth position closest to the first exciter antenna device and the reader antenna device outside the first area.

[0172] The determining unit is configured to determine a second power value of the inventory tag information based on the third signal strength parameter value and the fourth signal strength parameter value.

[0173] The adjustment unit is further used to adjust the first power value based on the second power value to obtain the adjusted first power value.

[0174] In one embodiment, the determination unit is also used to determine whether third reference tag information and fourth reference tag information are inventoried, wherein the third reference tag information is a reference tag deployed at a third position closest to the first exciter antenna device outside the first area, and the fourth reference tag information is a reference tag deployed at a fourth position closest to the first exciter antenna device and the reader antenna device outside the first area.

[0175] The determining unit is further configured to determine that the first label information is label information within the first area when the third reference label information and the fourth reference label information are not inventoried.

[0176] The determination unit is also used to determine that the first label information is the label information within the first area when the third reference label information and the fourth reference label information are stored and there is no label information identical to the first label information in the second label information stored in the second exciter antenna device outside the first area corresponding to the third reference label information and the fourth reference label information.

[0177] In one embodiment, the positioning device 1 may further include: a rejection unit.

[0178] The elimination unit is used to eliminate the second label information from the first label information recorded in the first area when the third reference label information and / or the fourth reference label information are stored and the second label information is stored in the second exciter antenna device outside the first area corresponding to the third reference label information and the fourth reference label information.

[0179] In one embodiment, the adjustment unit is further used to adjust the first power value to obtain the adjusted first power value when the third reference label information and the fourth reference label information are stored and the second label information stored in the second exciter antenna device outside the first area corresponding to the third reference label information and the fourth reference label information contains label information that is the same as the first label information.

[0180] The inventory unit is further used to use the adjusted first power value to re-inventory the tag information.

[0181] In one embodiment, the acquisition unit 10 is further used to acquire a first signal strength parameter value of the first reference tag information and a second signal strength parameter value of the second reference tag information; and to acquire a first energy value required to activate the tag information and a second energy value required to inventory the tag information.

[0182] The determination unit is also used to determine the first path loss value based on the first signal strength parameter value; and determine the second path loss value based on the second signal strength parameter value; and determine the first power value based on the first energy value, the first path loss value, the second energy value and the second path loss value.

[0183] An embodiment of the present application provides a positioning device, which obtains a first power value and performs an inventory operation on tag information based on the first power value; when the first reference tag information and the second reference tag information are inventoried, the first tag information inventoried by the first exciter antenna device is located in the first area, wherein the first reference tag information is a reference tag deployed at a first position farthest from the first exciter antenna device in the first area, and the second reference tag information is a reference tag deployed at a second position farthest from the first exciter antenna device and the reader antenna device in the first area. It can be seen that a positioning device proposed in an embodiment of the present application, by setting a smaller number of reference tag information in the first area, such as setting the first reference tag information The reference tag information and the second reference tag information are taken into account, and the first power value when the tag information is inventoried is obtained, and the first power value is used to inventory the set first reference tag information and the second reference tag information. Since the locations where the first reference tag information and the second reference tag information are set are the farthest from the first exciter antenna device and the first exciter antenna device and the reader antenna device, they are more difficult to be inventoried. Therefore, whether the tag information in the first area is inventoried can be determined based on whether the first reference tag information and the second reference tag information are inventoried, and the location of the inventoried first tag information can be further recorded. Therefore, this method can effectively determine the regional location information of the tag information in the first area, and realize regional-level positioning of the tag information.

[0184] Figure 7 This is a schematic diagram of the structure of a positioning device 1 provided in an embodiment of the present application. In practical applications, based on the same disclosed concept of the above embodiments, Figure 7 As shown, the positioning device 1 of the embodiment of the present application includes a processor 12 , a memory 13 and a communication bus 14 .

[0185] In the specific implementation process, the acquisition unit 10, the positioning unit 11, the adjustment unit, the inventory unit, the determination unit, and the elimination unit can be implemented by a processor 12 located on the positioning device 1, and the processor 12 can be at least one of an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing image processing device (DSPD), a programmable logic image processing device (PLD), a field programmable gate array (FPGA), a CPU, a controller, a microcontroller, and a microprocessor. It can be understood that for different devices, the electronic device used to implement the above-mentioned processor function can also be other, and the embodiments of the present application are not specifically limited.

[0186] In the embodiment of the present application, the communication bus 14 is used to realize the connection and communication between the processor 12 and the memory 13; when the processor 12 executes the running program stored in the memory 13, the following positioning method is implemented:

[0187] Acquire a first power value, and perform an inventory operation on the tag information based on the first power value; when the first reference tag information and the second reference tag information are inventoried, locate the first tag information inventoried by the first exciter antenna device in the first area, wherein the first reference tag information is a reference tag deployed at a first position farthest from the first exciter antenna device in the first area, and the second reference tag information is a reference tag deployed at a second position farthest from the first exciter antenna device and the reader antenna device in the first area.

[0188] In one embodiment, the processor 12 is further used to adjust the first power value to obtain an adjusted first power value when the first reference tag information and / or the second reference tag information is not inventoried; and to re-inventory the tag information using the adjusted first power value.

[0189] In one embodiment, the processor 12 is further used to obtain a third signal strength parameter value of third reference tag information and a fourth signal strength parameter value of fourth reference tag information, wherein the third reference tag information is a reference tag deployed at a third position closest to the first exciter antenna device outside the first area, and the fourth reference tag information is a reference tag deployed at a fourth position closest to the first exciter antenna device and the reader antenna device outside the first area; based on the third signal strength parameter value and the fourth signal strength parameter value, determine a second power value of the inventory tag information; based on the second power value, adjust the first power value to obtain the adjusted first power value.

[0190] In one embodiment, the processor 12 is further used to determine whether third reference tag information and fourth reference tag information are inventoried, wherein the third reference tag information is a reference tag deployed at a third position closest to the first exciter antenna device outside the first area, and the fourth reference tag information is a reference tag deployed at a fourth position closest to the first exciter antenna device and the reader antenna device outside the first area; if the third reference tag information and the fourth reference tag information are not inventoried, the first tag information is determined to be tag information within the first area; if the third reference tag information and the fourth reference tag information are inventoried and there is no tag information identical to the first tag information in the second tag information inventoried by the second exciter antenna device outside the first area corresponding to the third reference tag information and the fourth reference tag information, the first tag information is determined to be tag information within the first area.

[0191] In one embodiment, the processor 12 is further used to remove the second label information from the first label information recorded in the first area when the third reference label information and / or the fourth reference label information are stored and the second label information is stored in the second exciter antenna device outside the first area corresponding to the third reference label information and the fourth reference label information.

[0192] In one embodiment, the processor 12 is further used to adjust the first power value to obtain an adjusted first power value when the third reference tag information and the fourth reference tag information are stored and the second tag information stored by the second exciter antenna device outside the first area corresponding to the third reference tag information and the fourth reference tag information contains tag information that is identical to the first tag information; and use the adjusted first power value to re-inventory the tag information.

[0193] In one embodiment, the processor 12 is further used to obtain a first signal strength parameter value of the first reference tag information and a second signal strength parameter value of the second reference tag information; obtain a first energy value required to activate the tag information and a second energy value required to inventory the tag information; determine a first path loss value based on the first signal strength parameter value; and determine a second path loss value based on the second signal strength parameter value; determine a first power value based on the first energy value, the first path loss value, the second energy value, and the second path loss value.

[0194] Based on the above embodiments, the embodiments of the present application provide a storage medium on which a computer program is stored. The above computer-readable storage medium stores one or more programs. The above one or more programs can be executed by one or more processors and applied to a positioning device. The computer program implements the positioning method as described above.

[0195] Based on the above embodiments, an embodiment of the present application provides a computer program product, including a computer program. The computer program can be executed by one or more processors and applied to a positioning device. The computer program implements the positioning method as described above.

[0196] It should be noted that in the embodiments of the present application, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0197] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD), including a number of instructions for an image display device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the method described in each embodiment of the embodiment of the present application.

[0198] The above is only a specific implementation of the embodiment of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A positioning method, characterized in that: Applied to a first exciter antenna device, the method comprises: Acquire a first power value, and perform an inventory operation on tag information based on the first power value; When the first reference tag information and the second reference tag information are stored, the first tag information stored by the first exciter antenna device is located in the first area, wherein the first reference tag information is a reference tag deployed at a first position farthest from the position of the first exciter antenna device in the first area, and the second reference tag information is a reference tag deployed at a second position farthest from the first exciter antenna device and the reader antenna device in the first area.

2. The method according to claim 1, characterized in that After performing an inventory operation on the tag information based on the first power value, the method further includes: In a case where the first reference tag information and / or the second reference tag information is not stored, adjusting the first power value to obtain an adjusted first power value; The tag information is re-inventoryed using the adjusted first power value.

3. The method according to claim 2, characterized in that The adjusting the first power value to obtain an adjusted first power value includes: Obtaining a third signal strength parameter value of third reference tag information and a fourth signal strength parameter value of fourth reference tag information, wherein the third reference tag information is a reference tag deployed at a third position closest to the first exciter antenna device outside the first area, and the fourth reference tag information is a reference tag deployed at a fourth position closest to the first exciter antenna device and the reader antenna device outside the first area; determining a second power value of the inventory tag information based on the third signal strength parameter value and the fourth signal strength parameter value; Based on the second power value, the first power value is adjusted to obtain an adjusted first power value.

4. The method according to claim 1, characterized in that: After locating the first tag information stored in the first exciter antenna device in the first area, the method further includes: Determine whether third reference tag information and fourth reference tag information are inventoried, wherein the third reference tag information is a reference tag deployed at a third position closest to the first exciter antenna device outside the first area, and the fourth reference tag information is a reference tag deployed at a fourth position closest to the first exciter antenna device and the reader antenna device outside the first area; In the case where the third reference label information and the fourth reference label information are not inventoried, determining that the first label information is label information within the first area; When the third reference label information and the fourth reference label information are stored, and when there is no label information identical to the first label information in the second label information stored in the second exciter antenna device outside the first area corresponding to the third reference label information and the fourth reference label information, it is determined that the first label information is the label information within the first area.

5. The method according to claim 4, characterized in that After determining whether the third reference tag information and the fourth reference tag information have been inventoried, the method further includes: When the third reference label information and / or the fourth reference label information is stored, and the second label information of the second exciter antenna device outside the first area corresponding to the third reference label information and the fourth reference label information is stored, the second label information is deleted from the first label information recorded in the first area.

6. The method according to claim 4, characterized in that After determining whether the third reference tag information and the fourth reference tag information have been inventoried, the method further includes: When the third reference label information and the fourth reference label information are stored, and the second label information stored by the second exciter antenna device outside the first area corresponding to the third reference label information and the fourth reference label information has label information identical to the first label information, adjusting the first power value to obtain an adjusted first power value; The tag information is re-inventoryed using the adjusted first power value.

7. The method according to claim 1, characterized in that The obtaining of the first power value comprises: Acquire a first signal strength parameter value of the first reference tag information and a second signal strength parameter value of the second reference tag information; Acquire a first energy value required to activate the tag information and a second energy value required to inventory the tag information; Determine a first path loss value based on the first signal strength parameter value; and determine a second path loss value based on the second signal strength parameter value; The first power value is determined based on the first energy value, the first path loss value, the second energy value, and the second path loss value.

8. A positioning device, characterized in that: The device comprises: an acquiring unit, configured to acquire a first power value, and perform an inventory operation on the tag information based on the first power value; A positioning unit is used to locate the first tag information stored in the first exciter antenna device within the first area when the first reference tag information and the second reference tag information are stored, wherein the first reference tag information is a reference tag deployed at a first position farthest from the first exciter antenna device in the first area, and the second reference tag information is a reference tag deployed at a second position farthest from the first exciter antenna device and the reader antenna device in the first area.

9. A positioning device, characterized in that: The device comprises: a processor and a memory; when the processor executes the running program stored in the memory, the method according to any one of claims 1 to 7 is implemented.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

11. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the computer program implements the method according to any one of claims 1 to 7.

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