Access control method and device, electronic equipment and storage medium

Abstract

The invention discloses an access control method and device, electronic equipment and a storage medium. The method comprises the following steps: determining at least two pieces of target radio frequency tag authentication information corresponding to a target area and respective associated target radio frequency tag signal intensity information, and determining at least two pieces of target object key part feature information corresponding to the target area and respective associated target radio frequency tag position information, matching the at least two pieces of target object key part feature information with the at least two pieces of target radio frequency tag authentication information based on the respective associated target radio frequency tag position information and the respective associated target radio frequency tag signal intensity information; and controlling the target entrance guard based on the feature information of the key part of the target object and the authentication information of the target radio frequency tag which are matched in pairs. According to the scheme, the radio frequency tags do not need to be queued one by one for authentication, non-contact simultaneous access authentication of multiple target objects is realized, and the access passing efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent access control technology, and in particular to an access control method, device, electronic equipment and storage medium. Background Art

[0002] With the continuous development of the security field, access control systems are gradually being used for security management in many public places, such as office buildings, residential buildings, station gates and other public places with excessive traffic.

[0003] Among the related solutions, the most widely used and distributed one is the card access control, which is combined with facial recognition to achieve access control. For example, the target object swipes the card at the access control system, and the access control system compares the facial information in the card with the face recognized by the camera. If the comparison is successful, the access control will release the person, otherwise the access control will issue a prompt or alarm. However, the whole process not only requires the card to be attached to the card reader, which may cause card reading failure and delay passage if the card is placed in the wrong position, but also requires orderly queuing to swipe the card for passage, which will reduce the efficiency of access control and thus delay passage. Summary of the invention

[0004] The present invention provides a door access control method, device, electronic device and storage medium to solve the problem of card swiping failure at a door access point and low door access efficiency.

[0005] According to one aspect of the present invention, there is provided a door access control method, the method comprising:

[0006] Determine at least two target radio frequency tag authentication information corresponding to a target area and respective associated target radio frequency tag signal strength information, wherein the target area is a radio frequency transceiver coverage area of ​​a target access control;

[0007] Determine key part feature information of at least two target objects corresponding to the target area and location information of the target radio frequency tags associated with each of the two target objects, each of which is carried by the corresponding target object;

[0008] Matching the key part feature information of at least two target objects with the authentication information of at least two target radio frequency tags based on the respectively associated target radio frequency tag position information and the respectively associated target radio frequency tag signal strength information;

[0009] Based on matching paired target object key part feature information and target radio frequency tag authentication information, the target access control is controlled.

[0010] According to another aspect of the present invention, there is provided a door access control device, the device comprising:

[0011] A first determination module is used to determine at least two target radio frequency tag authentication information corresponding to a target area and respective associated target radio frequency tag signal strength information, wherein the target area is a radio frequency transceiver coverage area of ​​a target access control;

[0012] A second determination module is used to determine the key part feature information of at least two target objects corresponding to the target area and the position information of the target radio frequency tags associated with each of them, each target radio frequency tag is carried by the corresponding target object;

[0013] A matching module, for matching key part feature information of at least two target objects with authentication information of at least two target radio frequency tags based on respectively associated target radio frequency tag position information and respectively associated target radio frequency tag signal strength information;

[0014] The control module is used to control the target access control based on matching the paired key part feature information of the target object and the target radio frequency tag authentication information.

[0015] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0016] at least one processor; and

[0017] a memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the access control method described in any embodiment of the present invention.

[0019] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the access control method described in any embodiment of the present invention when executed.

[0020] The technical solution of the embodiment of the present invention can determine the key part feature information of at least two target objects and the authentication information of at least two target radio frequency tags corresponding to the target area, and perform access control authentication by simultaneously collecting multiple key part feature information and multiple radio frequency tag authentication information. In order to achieve accurate access control authentication, the associated target radio frequency tag position information is synchronously obtained when the key part feature information of the target object is collected, and the associated target radio frequency tag signal strength information is synchronously obtained when the target radio frequency tag authentication information is read. By matching the signal strength information of each target radio frequency tag with the position information of each target radio frequency tag, the correspondence between the key part feature information of each target object and the authentication information of each target radio frequency tag is achieved, and then access control authentication is performed. In this way, there is no need to queue up and use radio frequency tags for authentication one by one, and access control authentication of multiple target objects can be achieved at the same time without contact, thereby improving the access control efficiency.

[0021] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a flow chart of a door access control method provided according to an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of a scenario in which a target object passes through a target access control system according to an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of the distribution of target radio frequency tags and target objects in a target area applicable to an embodiment of the present invention;

[0026] Figure 4 is a flow chart of a door access control method provided according to an embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of an access control device provided according to an embodiment of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of an electronic device for implementing the access control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Figure 1 A flow chart of a door access control method is provided for an embodiment of the present invention. This embodiment is applicable to situations where the access status of a door access is to be accurately controlled. The method can be executed by a door access control device, which can be implemented in the form of hardware and / or software. The door access control device can be configured in any electronic device with a network communication function, which can be a camera, a terminal or a server, etc.

[0032] like Figure 1 As shown, the access control method in this embodiment may include the following process:

[0033] S110: Determine at least two target radio frequency tag authentication information corresponding to a target area and respective associated target radio frequency tag signal strength information, where the target area is a radio frequency transceiver coverage area of ​​a target access control.

[0034] See also Figure 2 , a radio frequency transceiver is set at the preset position of the target access control, and the coverage area of ​​the radio frequency transceiver of the target access control forms a radiation field area. According to the formed radiation field area, a certain range of the target area is demarcated from the radiation field area. When the target radio frequency tag enters the target area, it will receive the radio frequency signal sent by the radio frequency transceiver, and send out the information stored in the target radio frequency tag by means of the energy obtained by the induced current.

[0035] The target RFID tag may be a RFID tag with access rights to the target access control. When the RFID tag needs to be authorized to have access rights to the target access control, authentication information that enables the RFID tag to have access rights to the target access control may be pre-stored in the target RFID tag. For example, key part feature information that enables the RFID tag to have access rights to the target access control may be pre-acquired and the acquired key part feature information may be used as authentication information and stored in the target RFID tag. The key part may be the face.

[0036] See also Figure 2 and Figure 3 When at least two target RF tags enter the target area, the authentication information pre-stored in the target RF tags can be read from each target RF tag to obtain at least two target RF tag authentication information. At the same time, each target RF tag can also receive the RF signal sent by the RF transceiver, and then determine the target RF tag signal strength information used to describe the signal strength of the received RF signal. Each target RF tag has corresponding target RF tag authentication information and associated target RF tag signal strength information, and the target RF tag signal strength information is used to describe the signal strength of the received RF signal.

[0037] Optionally, the RFID tag can be divided into a passive RFID tag and an active RFID tag. Once the RFID transceiver enters the working state, it will emit a RFID signal to activate the RFID tag. If a passive RFID tag is encountered, it will also transmit power to the passive RFID tag. The RFID transceiver can be a RFID antenna.

[0038] As an optional but non-limiting implementation, determining at least two target radio frequency tag authentication information corresponding to the target area and the respective associated target radio frequency tag signal strength information may include steps A1-A2:

[0039] Step A1: Read authentication information stored in at least two target radio frequency tags entering the target area to obtain at least two target radio frequency tag authentication information, wherein the target radio frequency tag authentication information includes key part feature information of the target object that is pre-authorized and stored.

[0040] Step A2: Perform signal strength detection on each target RFID tag to obtain target RFID tag signal strength information associated with each target RFID tag authentication information. The target RFID tag signal strength information is used to describe the RFID signal strength received by the target RFID tag from the RFID transceiver at the corresponding position at different times.

[0041] When the target object is pre-authorized to have access to the target access control, a target RFID tag with access rights to the target access control can be provided to the target object, and the target RFID tag can store key feature information of the target object. The target object can be a pedestrian or an object that needs to pass through the access control.

[0042] When multiple target RF tags are detected in the target area, the card reading function of the RF transceiver can be used to directly read the pre-stored key part feature information from each target RF tag, and the authentication information stored in each target RF tag can be obtained. In addition, the card reading function of the RF transceiver can also receive other information reported by each target RF tag, and generate the RF signal strength received by each target RF tag from the RF transceiver at the corresponding position at different times, which can be used as the target RF tag signal strength information associated with the authentication information of each target RF tag. The following Table 1 shows the authentication information and signal strength information read from each target RF tag, and the signal strength information is represented by the RF signal strength SS received by the target RF tag from the RF transceiver at different times T.

[0043] Table 1 Target RFID tag signal strength information

[0044] serial number RFID tag 1 Signal strength, time 1 CardX1 SS11,T11;SS12,T12;SS13,T13;…… 2 CardX2 SS11,T11;SS12,T12;SS13,T13;…… 3 CardX3 SS11,T11;SS12,T12;SS13,T13;… ……

[0045] Optionally, the reading range of the RF transceiver for the RF tag can be expanded by increasing the transceiver power, increasing the number of RF antennas, adjusting the direction and length of the RF antennas, and adding repeaters or range extenders.

[0046] As an optional example, the signal strength can be increased by increasing the receiving and transmitting power of the RF transceiver, thereby expanding the reading range of the RF transceiver for RF tags. As another optional example, multiple RF antennas can be added to the RF transceiver to expand the range of the RF transceiver reading RF tags, but attention should be paid to the interference between the RF antennas. As another optional example, if the RF transceiver has the function of an adjustable RF antenna, the spatial range of the RF transceiver reading RF tags can be expanded by adjusting the direction and length of the RF antenna, which can be adjusted according to actual conditions. As another optional example, the signal of the RF transceiver can be forwarded or amplified by installing a range extender or repeater, thereby expanding the reading range of the RF transceiver for RF tags.

[0047] Optionally, the relationship between RF antenna power and reading distance can be expressed by the following formula: reading distance = k × antenna power ^ p. Wherein, k is a constant, and p is an index related to a specific scenario, generally taking a value between 2 and 4. It should be noted that the formula is an approximate model, and the actual reading distance may be affected by multiple factors such as environmental factors, antenna technology, and RF transceiver.

[0048] S120: Determine key part feature information of at least two target objects corresponding to the target area and position information of the target radio frequency tags associated with each of the two target objects, each of which is carried by the corresponding target object.

[0049] See also Figure 2 and Figure 3 , considering that the target RFID tag is usually carried by the target object into the target area rather than entering the target area by itself, when determining the authentication information of at least two target RFID tags corresponding to the target area and the signal strength information of the respectively associated target RFID tags, the key part feature information of the target object carrying the target RFID tag can also be extracted to obtain the corresponding key part feature information of the target object.

[0050] Continue to see Figure 2 and Figure 3 For multiple target RF tags entering the target area, each target RF tag is carried by the corresponding target object into the target area. Therefore, when determining the key part feature information of each target object corresponding to the target area, the position information of the target RF tag carried by each target object is also synchronously obtained and associated with the key part feature information of the target object. The position information of the target RF tag associated with the key part feature information of each target object can be recorded as the following Table 2 showing the authentication information and signal strength information read from each target RF tag, the key part feature information of the target object associated with the signal strength information target RF tag, and the position Pos of the target RF tag in the target area at different times T.

[0051] Table 2 Target RFID tag location information associated with key part feature information of target object

[0052]

[0053] As an optional but non-limiting implementation, determining the key part feature information of at least two target objects corresponding to the target area and the respective associated target radio frequency tag position information may include steps B1-B2:

[0054] Step B1: Detect key parts of at least two target objects entering the target area to obtain key part feature information of at least two target objects, wherein the target objects include key parts.

[0055] Step B2: Perform position detection on the target RFID tags entering the target area to obtain the target RFID tag position information associated with the key part feature information of the target object. Each target RFID tag has an associated target object, and the position information of each target RFID tag is used to describe the position of the target RFID tag in the target area at different times.

[0056] See also Figure 2 At least one camera is configured at a preset position of the target access control. The position of each target object entering the target area can be detected by the at least one configured camera. There is a relative position relationship between the position of the target object and the key part of the target object. Then, based on the position of each target object, the key part of the target object is feature identified to obtain the key part feature information of each target object.

[0057] Optionally, at least one camera may be one camera, in which case one camera may be used to detect the position of the target object in the target area and identify and detect the key parts of the target object; or, see Figure 2 , at least one camera may be two cameras, in which case the first camera C1 may be used to detect the position of the target object and the second camera C2 may be used to identify and detect key parts of the target object.

[0058] See also Figure 2 After detecting the position of each target object entering the target area, combined with the relative position relationship between each target object and the target RFID tag it carries, the target RFID tag position information can be estimated based on the position of each target object. Since each target RFID tag is carried by the corresponding target object and each target RFID tag has an associated target object, the estimated target RFID tag position information can be associated with the identified key part feature information of the target object, so that the target RFID tag position information associated with the key part feature information of each target object can be obtained.

[0059] As an optional but non-limiting implementation, performing position detection on a target radio frequency tag entering a target area to obtain the target radio frequency tag position information associated with the key part feature information of the target object may include steps C1-C2:

[0060] Step C1: If it is detected that there is a target object in the target area moving toward the target access control, the placement posture of the target radio frequency tag associated with the target object on the target object is determined.

[0061] Step C2: determining the target radio frequency tag position information associated with the key part feature information of the target object based on the placement posture of the target radio frequency tag on the target object and the position of the target object in the target area.

[0062] See also Figure 2, detect whether there is a target object in the target area, and if so, detect whether the target object in the target area moves toward the target access control direction. When the target object is detected to move toward the target access control direction, determine the position of each target object in the target area, and identify the placement posture of the target RFID tag on the target object, such as the holding posture of the target object to the target RFID tag when the target object carries the target RFID tag, and then determine the relative position relationship between the position of the target object and the key parts of the target object in combination with the placement posture of the target RFID tag on the target object, and then estimate the target RFID tag position information of each target RFID tag and associate it with the identified key part feature information of the target object, so as to obtain the target RFID tag position information associated with each key part feature information of the target object.

[0063] S130: Match the key part feature information of at least two target objects with the authentication information of at least two target radio frequency tags based on the respectively associated target radio frequency tag position information and the respectively associated target radio frequency tag signal strength information.

[0064] Optionally, by analyzing the change rules of each position in the associated target RFID tag position information and analyzing the change rules of the signal strength at different times in the target RFID tag signal strength information, according to the signal strength distribution function (or amplitude pattern) f(x, y, z) of the RFID transceiver of the target access control corresponding to the target area, the feature information of the key parts of at least two target objects is matched with the authentication information of at least two target RFID tags, as shown in Table 3 below.

[0065]

[0066] Whether it is the target RFID tag signal strength information or the target RFID tag location information, it is calculated for the target RFID tag. At the same time, the camera coordinate space used to calculate the target RFID tag location information is consistent with the antenna coordinate space used to calculate the target RFID tag signal strength information. Therefore, the RFID signal strength received from the RFID transceiver by the target RFID tag corresponding to the same target RFID tag at the same position should be consistent or approximately consistent.

[0067] Based on the above principle, according to the signal strength distribution corresponding to the RF transceiver corresponding to the target area, the strength of each RF signal received by the target RF tag from the RF transceiver at different positions corresponding to the target RF tag position information can be estimated, and the reference RF tag signal strength information corresponding to the target RF tag position information can be estimated. At this time, the reference RF tag signal strength information corresponding to the estimated target RF tag position information can be matched with the signal strength information of each target RF tag for similarity, so as to find the target RF tag signal strength information that matches the similarity of the reference RF tag signal strength.

[0068] At the same time, since each target RFID tag authentication information has its associated target RFID tag signal strength information, and each target object key part feature information also has its associated target RFID tag position information, it can be considered that the target object key part feature information associated with the reference RFID tag signal strength information of the similarity matching is matched with the target RFID tag authentication information associated with the target RFID tag signal strength information.

[0069] S140: Control the target access control based on matching the paired key part feature information of the target object and the target radio frequency tag authentication information.

[0070] When the key part feature information of the target object matches the target radio frequency tag authentication information, the target radio frequency tag carried by the target object corresponding to the key part feature information of the target object and the target radio frequency tag corresponding to the target radio frequency tag authentication information are the same. At this time, if it is verified that the key part features included in the key part feature information of the target object are the same as the key part features included in the target radio frequency tag authentication information, the target access control can be controlled to be in a pass state; if it is verified that the key part features included in the key part feature information of the target object are different from the key part features included in the target radio frequency tag authentication information, it indicates that the target radio frequency tag is not authorized to the target object and may be someone else's radio frequency tag or the target radio frequency tag carried by the target object is not authorized to the target object. At this time, the target access control can be controlled to be in a prohibited pass state.

[0071] The technical solution of the embodiment of the present invention can determine the key part feature information of at least two target objects and the authentication information of at least two target radio frequency tags corresponding to the target area, and perform access control authentication by simultaneously collecting multiple key part feature information and multiple radio frequency tag authentication information. In order to achieve accurate access control authentication, the associated target radio frequency tag position information is synchronously obtained when the key part feature information of the target object is collected, and the associated target radio frequency tag signal strength information is synchronously obtained when the target radio frequency tag authentication information is read. By matching the signal strength information of each target radio frequency tag with the position information of each target radio frequency tag, the correspondence between the key part feature information of each target object and the authentication information of each target radio frequency tag is achieved, and then access control authentication is performed. In this way, there is no need to queue up and use radio frequency tags for authentication one by one, and access control authentication of multiple target objects can be achieved at the same time without contact, thereby improving the access control efficiency.

[0072] Figure 4A flowchart of another access control method is provided for an embodiment of the present invention. The technical solution of this embodiment further optimizes the process of matching the key part feature information of at least two target objects with the authentication information of at least two target radio frequency tags based on the position information of the respective associated target radio frequency tags and the signal strength information of the respective associated target radio frequency tags in the aforementioned embodiment. This embodiment can be combined with each optional solution in one or more of the above embodiments.

[0073] like Figure 4 As shown, the access control method in this embodiment may include the following process:

[0074] S410: Determine key part feature information of at least two target objects corresponding to a target area and respectively associated target radio frequency tag position information, where the target area is a coverage area of ​​a radio frequency transceiver of a target access control.

[0075] S420: Determine at least two target radio frequency tag authentication information corresponding to the target area and the respective associated target radio frequency tag signal strength information.

[0076] S430, determining reference RF tag signal strength information corresponding to the respective associated target RF tag position information based on the respective associated target RF tag position information and the reference signal strength distribution information corresponding to the target area, wherein the reference signal strength distribution information pre-calibrates the RF signal strength that the target RF tag can receive from the RF transceiver at different positions within the target area.

[0077] According to the parameters of the RF transceiver (such as the RF antenna) in the target area, draw the amplitude pattern or signal strength distribution f(x, y, z) in the target area to describe the RF signal strength that the target RF tag can receive from the RF transceiver at different positions in the target area, and record it as the reference signal strength distribution information corresponding to the target area. Among them, the coordinate space used by the camera used to detect the position of the target object in the target area is consistent with the coordinate space corresponding to the RF transceiver in the target area. Of course, the RF signal strength that the target RF tag can receive from the RF transceiver at different positions in the target area can also be drawn based on actual measurements.

[0078] Optionally, the amplitude pattern of the RF transceiver of the target access control in the target area can be the following specific configuration: N=10 (10 arrays), β=0 (equal amplitude in-phase array), d=λ / 4 (array spacing d can be any distance that is not an integer multiple of the wavelength) array factor of an ordinary end-fire array.

[0079] The target RFID tag is usually carried by the corresponding target object. As time changes, the target object will adjust its position. In this way, the target RFID tag position information may include the position of the target RFID tag at different times as the position of the target object changes. Then, the position of the target tag at different times can be substituted into the relationship between the position indicated by the reference RFID tag signal strength information and the change in RFID signal strength to estimate the RFID signal strength that the target RFID tag can receive from the RFID transceiver at each position indicated by the target RFID tag position information, and the reference RFID tag signal strength information corresponding to each target RFID tag position information can be obtained.

[0080] S440: Perform signal strength matching between the reference radio frequency tag signal strength information corresponding to the respectively associated target radio frequency tag position information and the respectively associated target radio frequency tag signal strength information.

[0081] According to the signal strength distribution of the RF transceiver in the target area, for the same target RF tag, the reference RF tag signal strength estimated based on the target RF tag location information should be consistent or approximately consistent with the target RF tag signal strength information reported by the target RF tag. Based on the above analysis, the reference RF tag signal strength information corresponding to each target RF tag location information and each target RF tag signal strength information can be matched for signal strength information similarity according to the RF signal strength change law indicated by each reference RF tag signal strength information and the RF signal strength change law indicated by each target RF tag signal strength information. The RF signal strength change law is used to describe the change of RF signal strength over time.

[0082] By adopting the above method, we try to analyze the change law of the RF signal strength received by the target RF tag and the change law of the position of the target RF tag. Based on the signal strength distribution function (or amplitude pattern) f(x, y, z) of the RF transceiver, we match the position information of each target RF tag with the signal strength information of each target RF tag, and then find the correspondence between the authentication information of each target RF tag and the key part feature information of each target object. Next, we perform similarity matching on the key part feature information indicated by the key part feature information of the target object and the key part feature information in the authentication information of the target RF tag, so as to determine whether the door can be opened.

[0083] As an optional but non-limiting implementation, signal strength matching of the reference RFID tag signal strength information corresponding to the respectively associated target RFID tag position information and the respectively associated target RFID tag signal strength information may include steps D1-D3:

[0084] Step D1: extracting a preset number of reference RF signal strengths from each reference RF tag signal strength information at a preset sampling interval, and extracting a preset number of target RF signal strengths from each target RF tag signal strength information at a preset sampling interval.

[0085] Step D2: determining a signal strength difference between a reference RF signal strength value extracted from the reference RF tag signal strength information and a target RF signal strength value extracted from the target RF tag signal strength information.

[0086] Step D3: perform signal strength matching on at least two reference RF signal strength information and at least two target RF tag signal strength information based on the signal strength difference, so as to pair the reference RF tag signal strength information corresponding to the target RF tag position information that can form the minimum signal strength difference with the target RF signal strength information associated with the target RF tag authentication information.

[0087] See also Figure 2 and Figure 3 For each target RF tag signal strength information drawn, the target RF tag signal strength information describes the RF signal strength received by the target RF tag from the RF transceiver at different times. For example, the RF signal strength value change curve g can be used. i (ss, t), i takes the value (0, m], and there are m target RFID tags. For each target RFID tag position information drawn, each target RFID tag position information describes the position of the target RFID tag in the target area at different times. For example, the target RFID tag position change curve h j (x, y, z, t), j takes the value of (0, m].

[0088] See also Figure 2 and Figure 3 , in the signal strength distribution function (or amplitude pattern) f(x,y,z) of the RF transceiver in the target area, according to the target RF tag position change curve h j (x, y, z, t), calculate the corresponding RF signal strength value change curve g1 j (ss,t), we can get the reference RFID tag signal strength information corresponding to the target RFID tag location information. j (ss,t) and g i By matching (ss, t) in pairs and finding the closest curve pair, the signal strength information of the matched reference RFID tag and the signal strength information of the target RFID tag can be obtained.

[0089] See also Figure 2 and Figure 3 , in g1 j (ss,t) and g iIn the curve corresponding to (ss, t), multiple time points are uniformly sampled and the total difference of signal strength values ​​is calculated. The curve pair with the smallest total difference of signal strength values ​​is the most similar curve pair, where t takes the same value. g1 j (ss,t) and g i After (ss, t) pairing is completed, the location, signal strength and corresponding key part feature information of each target RFID tag authentication information at different times can be obtained.

[0090] S450: Match at least two target object key part feature information with at least two target radio frequency tag authentication information according to the signal strength matching result to obtain matched pairs of target object key part feature information and target object key part feature information.

[0091] S460: Control the target access control based on matching the paired key part feature information of the target object and the target radio frequency tag authentication information.

[0092] As an optional but non-limiting implementation method, based on matching paired target object key part feature information and target radio frequency tag authentication information, target access control is controlled, including steps E1-E3:

[0093] Step E1: for each matched pair of key part feature information of the target object and the target radio frequency tag authentication information, read the key part feature information that is pre-authorized and stored from the target radio frequency tag authentication information.

[0094] Step E2: determining the key part feature similarity between the read key part feature information and the key part feature information of the target object.

[0095] Step E3: Control the target access control according to the similarity of the features of each key part.

[0096] Optionally, controlling the target access control according to the similarity of each key part feature includes: if the similarities of all key part features meet the preset similarity condition, controlling the target access control to be in a pass state; if there is a key part feature similarity that does not meet the preset similarity condition, detecting the relative distance between the target radio frequency tag associated with the key part feature information of each target object and the target access control, and adjusting the pass state of the target access control according to each relative distance.

[0097] Exemplarily, each matched pair of key part feature information of the target object and the target radio frequency tag authentication information is read line by line, and the key part features in the matched pair of key part feature information of the target object are compared with the key part features stored in the target radio frequency tag authentication information, that is, the key part feature information read from the target radio frequency tag authentication information i and the key part feature information in the key part feature information of the target object matched with the target radio frequency tag authentication information i are compared. If the similarity of the key part features exceeds a threshold value 1, it is considered that the key part feature information of the target object and the target radio frequency tag authentication information can match, otherwise they do not match.

[0098] If all the matching pairs of key feature information of the target object match the target RFID tag authentication information, the target access control allows release; if all the matching pairs of key feature information of the target object match the target RFID tag authentication information, the relative distance between the target RFID tags corresponding to each target RFID tag authentication information and the target access control is analyzed. If the relative distance between the unmatched target RFID tag and the target access control is less than or equal to the relative distance between the matched target RFID tag and the target access control, the target access control prohibits passage; if the relative distance between the unmatched target RFID tag and the target access control is greater than the relative distance between the matched target RFID tag and the target access control, the target access control allows passage.

[0099] The technical solution of the embodiment of the present invention can determine the key part feature information of at least two target objects and the authentication information of at least two target radio frequency tags corresponding to the target area, and perform access control authentication by simultaneously collecting multiple key part feature information and multiple radio frequency tag authentication information. In order to achieve accurate access control authentication, the associated target radio frequency tag position information is synchronously obtained when the key part feature information of the target object is collected, and the associated target radio frequency tag signal strength information is synchronously obtained when the target radio frequency tag authentication information is read. By matching the signal strength information of each target radio frequency tag with the position information of each target radio frequency tag, the correspondence between the key part feature information of each target object and the authentication information of each target radio frequency tag is achieved, and then access control authentication is performed. In this way, there is no need to queue up and use radio frequency tags for authentication one by one, and access control authentication of multiple target objects can be achieved at the same time without contact, thereby improving the access control efficiency.

[0100] Figure 5 A structural block diagram of an access control device is provided for an embodiment of the present invention. This embodiment can be applied to situations where the access status of a door is to be accurately controlled. The access control device can be implemented in the form of hardware and / or software. The access control device can be configured in any electronic device with a network communication function, which can be a camera, a terminal or a server, etc.

[0101] like Figure 5 As shown, the access control device in this embodiment may include:

[0102] A first determination module 510 is used to determine at least two target radio frequency tag authentication information corresponding to a target area and respective associated target radio frequency tag signal strength information, wherein the target area is a radio frequency transceiver coverage area of ​​a target access control;

[0103] The second determination module 520 is used to determine the key part feature information of at least two target objects corresponding to the target area and the location information of the target radio frequency tags associated with each of them, each target radio frequency tag is carried by the corresponding target object;

[0104] A matching module 530, for matching key part feature information of at least two target objects with authentication information of at least two target radio frequency tags based on the respectively associated target radio frequency tag position information and the respectively associated target radio frequency tag signal strength information;

[0105] The control module 540 is used to control the target access control based on matching the paired key part feature information of the target object and the target radio frequency tag authentication information.

[0106] Based on the above embodiment, optionally, determining the key part feature information of at least two target objects corresponding to the target area and the position information of the target radio frequency tags associated with each of the two target objects includes:

[0107] Performing key part detection on at least two target objects entering the target area to obtain key part feature information of at least two target objects;

[0108] The position of the target radio frequency tag entering the target area is detected to obtain the target radio frequency tag position information associated with the key part feature information of the target object. Each target radio frequency tag has an associated target object, and the position information of each target radio frequency tag is used to describe the position of the target radio frequency tag in the target area at different times.

[0109] On the basis of the above embodiment, optionally, performing position detection on a target radio frequency tag entering a target area to obtain the target radio frequency tag position information associated with the key part feature information of the target object includes:

[0110] If it is detected that there is a target object in the target area moving toward the target access control, then the placement posture of the target radio frequency tag associated with the target object on the target object is determined;

[0111] The target radio frequency tag position information associated with the key part feature information of the target object is determined based on the placement posture of the target radio frequency tag on the target object and the position of the target object in the target area.

[0112] Based on the above embodiment, optionally, determining at least two target radio frequency tag authentication information corresponding to the target area and the respective associated target radio frequency tag signal strength information includes:

[0113] Reading authentication information stored in at least two target radio frequency tags entering the target area to obtain at least two target radio frequency tag authentication information, wherein the target radio frequency tag authentication information includes key part feature information of the target object that is pre-authorized and stored;

[0114] Signal strength detection is performed on each of the target radio frequency tags to obtain target radio frequency tag signal strength information associated with each of the target radio frequency tag authentication information, wherein the target radio frequency tag signal strength information is used to describe the radio frequency signal strength received by the target radio frequency tag from the radio frequency transceiver at the corresponding position at different times.

[0115] Based on the above embodiment, optionally, matching the key part feature information of at least two target objects with the authentication information of at least two target radio frequency tags based on the respectively associated target radio frequency tag position information and the respectively associated target radio frequency tag signal strength information includes:

[0116] Determine reference RF tag signal strength information corresponding to the respective associated target RF tag position information based on the respective associated target RF tag position information and the reference signal strength distribution information corresponding to the target area, wherein the reference signal strength distribution information pre-calibrates the RF signal strength that the target RF tag can receive from the RF transceiver at different positions within the target area;

[0117] Match the reference RFID tag signal strength information corresponding to the respective associated target RFID tag position information with the respective associated target RFID tag signal strength information;

[0118] According to the signal strength matching result, at least two target object key part feature information and at least two target radio frequency tag authentication information are matched to obtain matched pairs of target object key part feature information and target object key part feature information.

[0119] Based on the above embodiment, optionally, signal strength matching is performed between the reference RFID tag signal strength information corresponding to the respectively associated target RFID tag position information and the respectively associated target RFID tag signal strength information, including:

[0120] Extracting a preset number of reference RF signal strengths from each reference RF tag signal strength information at a preset sampling interval, and extracting a preset number of target RF signal strengths from each target RF tag signal strength information at a preset sampling interval;

[0121] Determine a signal strength difference between a reference RF signal strength value extracted from the reference RF tag signal strength information and a target RF signal strength value extracted from the target RF tag signal strength information;

[0122] Signal strength matching is performed on at least two reference RF signal strength information and at least two target RF tag signal strength information based on the signal strength difference, so as to match the reference RF tag signal strength information corresponding to the target RF tag position information that can form the minimum signal strength difference with the target RF signal strength information associated with the target RF tag authentication information into pairs.

[0123] On the basis of the above embodiment, optionally, based on matching the paired key part feature information of the target object and the target radio frequency tag authentication information, the target access control is controlled, including:

[0124] For each matched pair of key part feature information of the target object and the target radio frequency tag authentication information, read the pre-authorized and stored key part feature information from the target radio frequency tag authentication information;

[0125] Determine the key part feature similarity between the read key part feature information and the key part feature information of the target object;

[0126] The target access control is controlled according to the similarity of the features of each key part.

[0127] On the basis of the above embodiment, optionally, controlling the target access control according to the similarity of each key part feature includes:

[0128] If the similarities of all the key part features meet the preset similarity condition, the target access control is controlled to be in a pass state;

[0129] If the similarity of the key part features does not meet the preset similarity condition, the relative distance between the target radio frequency tag associated with the key part feature information of each target object and the target access control is detected, and the access status of the target access control is adjusted according to each relative distance.

[0130] The technical solution of the embodiment of the present invention can determine the key part feature information of at least two target objects and the authentication information of at least two target radio frequency tags corresponding to the target area, and perform access control authentication by simultaneously collecting multiple key part feature information and multiple radio frequency tag authentication information. In order to achieve accurate access control authentication, the associated target radio frequency tag position information is synchronously obtained when the key part feature information of the target object is collected, and the associated target radio frequency tag signal strength information is synchronously obtained when the target radio frequency tag authentication information is read. By matching the signal strength information of each target radio frequency tag with the position information of each target radio frequency tag, the correspondence between the key part feature information of each target object and the authentication information of each target radio frequency tag is achieved, and then access control authentication is performed. In this way, there is no need to queue up and use radio frequency tags for authentication one by one, and access control authentication of multiple target objects can be achieved at the same time without contact, thereby improving the access control efficiency.

[0131] The access control device provided in the embodiment of the present invention can execute the access control method provided in any embodiment of the present invention, and has the corresponding functions and beneficial effects of executing the access control method. For detailed processes, please refer to the relevant operations of the access control method in the above embodiments.

[0132] It is worth noting that the various units and modules included in the above-mentioned device are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the embodiments of the present disclosure.

[0133] Figure 6 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0134] like Figure 6As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0135] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0136] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the access control method.

[0137] In some embodiments, the access control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the access control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the access control method in any other appropriate manner (e.g., by means of firmware).

[0138] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0139] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0140] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0141] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0142] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0143] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0144] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0145] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A door access control method, characterized in that: The method comprises: Determine at least two target radio frequency tag authentication information corresponding to a target area and respective associated target radio frequency tag signal strength information, wherein the target area is a radio frequency transceiver coverage area of ​​a target access control; Determine key part feature information of at least two target objects corresponding to the target area and location information of the target radio frequency tags associated with each of the two target objects, each of which is carried by the corresponding target object; Matching the key part feature information of at least two target objects with the authentication information of at least two target radio frequency tags based on the respectively associated target radio frequency tag position information and the respectively associated target radio frequency tag signal strength information; Based on matching paired target object key part feature information and target radio frequency tag authentication information, the target access control is controlled.

2. The method according to claim 1, characterized in that: Determining key feature information of at least two target objects corresponding to the target area and location information of the target radio frequency tags associated with each of the two target objects includes: Performing key part detection on at least two target objects entering the target area to obtain key part feature information of at least two target objects; The position of the target radio frequency tag entering the target area is detected to obtain the target radio frequency tag position information associated with the key part feature information of the target object. Each target radio frequency tag has an associated target object, and the position information of each target radio frequency tag is used to describe the position of the target radio frequency tag in the target area at different times.

3. The method according to claim 1, characterized in that Determining at least two target radio frequency tag authentication information corresponding to the target area and the respective associated target radio frequency tag signal strength information, including: Reading authentication information stored in at least two target radio frequency tags entering the target area to obtain at least two target radio frequency tag authentication information, wherein the target radio frequency tag authentication information includes key part feature information of the target object that is pre-authorized and stored; Signal strength detection is performed on each of the target radio frequency tags to obtain target radio frequency tag signal strength information associated with each of the target radio frequency tag authentication information, wherein the target radio frequency tag signal strength information is used to describe the radio frequency signal strength received by the target radio frequency tag from the radio frequency transceiver at the corresponding position at different times.

4. The method according to claim 1, characterized in that: Based on the respectively associated target radio frequency tag position information and the respectively associated target radio frequency tag signal strength information, matching the key part feature information of at least two target objects with the at least two target radio frequency tag authentication information includes: Determine reference RF tag signal strength information corresponding to the respective associated target RF tag position information based on the respective associated target RF tag position information and the reference signal strength distribution information corresponding to the target area, wherein the reference signal strength distribution information pre-calibrates the RF signal strength that the target RF tag can receive from the RF transceiver at different positions within the target area; Match the reference RFID tag signal strength information corresponding to the respective associated target RFID tag position information with the respective associated target RFID tag signal strength information; According to the signal strength matching result, at least two target object key part feature information and at least two target radio frequency tag authentication information are matched to obtain matched pairs of target object key part feature information and target object key part feature information.

5. The method according to claim 4, characterized in that The signal strength of the reference radio frequency tag signal strength information corresponding to the respectively associated target radio frequency tag position information is matched with the respectively associated target radio frequency tag signal strength information, including: Extracting a preset number of reference RF signal strengths from each reference RF tag signal strength information at a preset sampling interval, and extracting a preset number of target RF signal strengths from each target RF tag signal strength information at a preset sampling interval; Determine a signal strength difference between a reference RF signal strength value extracted from the reference RF tag signal strength information and a target RF signal strength value extracted from the target RF tag signal strength information; Signal strength matching is performed on at least two reference RF signal strength information and at least two target RF tag signal strength information based on the signal strength difference, so as to match the reference RF tag signal strength information corresponding to the target RF tag position information that can form the minimum signal strength difference with the target RF signal strength information associated with the target RF tag authentication information into pairs.

6. The method according to claim 1, characterized in that Based on matching paired key part feature information of the target object and target radio frequency tag authentication information, the target access control is controlled, including: For each matched pair of key part feature information of the target object and the target radio frequency tag authentication information, read the pre-authorized and stored key part feature information from the target radio frequency tag authentication information; Determine the key part feature similarity between the read key part feature information and the key part feature information of the target object; The target access control is controlled according to the similarity of the features of each key part.

7. The method according to claim 7, characterized in that: The target access control is controlled according to the similarity of the key part features, including: If the similarities of all the key part features meet the preset similarity condition, the target access control is controlled to be in a pass state; If the similarity of the key part features does not meet the preset similarity condition, the relative distance between the target radio frequency tag associated with the key part feature information of each target object and the target access control is detected, and the access status of the target access control is adjusted according to each relative distance.

8. An access control device, characterized in that: The device comprises: A first determination module is used to determine at least two target radio frequency tag authentication information corresponding to a target area and respective associated target radio frequency tag signal strength information, wherein the target area is a radio frequency transceiver coverage area of ​​a target access control; A second determination module is used to determine the key part feature information of at least two target objects corresponding to the target area and the position information of the target radio frequency tags associated with each of them, each target radio frequency tag is carried by the corresponding target object; A matching module, for matching key part feature information of at least two target objects with authentication information of at least two target radio frequency tags based on respectively associated target radio frequency tag position information and respectively associated target radio frequency tag signal strength information; The control module is used to control the target access control based on matching the paired key part feature information of the target object and the target radio frequency tag authentication information.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the access control method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the access control method according to any one of claims 1 to 7 when executed.

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