CN117058800A - Method for judging whether target is inside or outside door - Google Patents

Method for judging whether target is inside or outside door Download PDF

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Publication number
CN117058800A
CN117058800A CN202310925333.4A CN202310925333A CN117058800A CN 117058800 A CN117058800 A CN 117058800A CN 202310925333 A CN202310925333 A CN 202310925333A CN 117058800 A CN117058800 A CN 117058800A
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CN
China
Prior art keywords
uwb
uwb antenna
antenna module
door
tag
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310925333.4A
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Chinese (zh)
Inventor
夏霆
罗文天
陶成益
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunshan Xingpeng Microelectronics Technology Co ltd
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Kunshan Xingpeng Microelectronics Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kunshan Xingpeng Microelectronics Technology Co ltd filed Critical Kunshan Xingpeng Microelectronics Technology Co ltd
Priority to CN202310925333.4A priority Critical patent/CN117058800A/en
Publication of CN117058800A publication Critical patent/CN117058800A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/30—Individual registration on entry or exit not involving the use of a pass
    • G07C9/32—Individual registration on entry or exit not involving the use of a pass in combination with an identity check
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07773—Antenna details
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/30—Individual registration on entry or exit not involving the use of a pass
    • G07C9/38—Individual registration on entry or exit not involving the use of a pass with central registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The invention relates to the technical field of intelligent home and discloses a method for judging whether a target is inside or outside a door, which comprises the following steps that 1) a UWB antenna tag determines whether the target enters a communication range by sending a UWB broadcast frame to an inner UWB antenna module and an outer UWB antenna module; 2) When the UWB antenna tag enters a communication range, the inner UWB antenna module and the outer UWB antenna module conduct authorization judgment on the UWB antenna tag; 3) When the UWB antenna tag is an authorized user, the UWB antenna tag, the inner UWB antenna module and the outer UWB antenna module mutually send time information, and ToF1 and ToF2 are calculated through a calculation formula; 4) Finally, the UWB antenna tag transmits ToF1 and ToF2 to a control node for controlling the door lock switch through wireless communication to perform judgment operation, and whether the user is in the door or out of the door is determined. The method for judging the inside and outside of the door adopts the ToF flight time and the arrival time difference to judge the inside and outside of the door of the target user, and has the advantages of low power consumption, lower cost and the like while realizing noninductive unlocking/door.

Description

Method for judging whether target is inside or outside door
Technical Field
The invention relates to the technical field of intelligent home, in particular to a method for judging whether a target is inside or outside a door.
Background
Along with the progress of the times, technological development, intelligent begins to walk into each side of our life, wherein intelligent house is to be through internet of things, with house equipment connection, realize intelligent control and management, thereby promote quality of life and energy-concerving and environment-protective, intelligent house includes multiple equipment such as intelligent light, intelligent electrical apparatus, intelligent (window) curtain and intelligent security protection, can carry out remote control and management through intelligent terminal such as cell-phone, panel computer, realize intelligent house's dream, and along with intelligent house's rising, wherein the unblanking door of noninduction has become the important demand of its trade.
However, some technologies for identifying and judging identity/inside and outside the door without sensing open/lock at present are manual technologies such as camera technology, human body induction radar, sound control technology, fingerprint identification and iris identification, but some problems exist in the technical means more or less: if the camera technology can distinguish identity and door inside and outside through face recognition, but the problems of large power consumption, vision blind area, inconvenient electricity taking and the like exist, and the human body induction radar is that: although people outside the door can be accurately identified, the identities of the people cannot be identified, and the voice control technology is as follows: voiceprint recognition is inaccurate, potential safety hazards exist due to the fact that voice can be recorded by people, people cannot be recognized in the door or outside the door, and fingerprint recognition is performed: although the fingerprint identification can be accurately performed, the fingerprint acquisition is performed by extending the hands of the user, the door cannot be opened or closed without sense, and the iris identification is performed: although the identification can be accurately performed, the user is required to aim at the pupil to the acquisition identification area, and the aim of opening and closing the door without sense cannot be completely achieved, so that the technology capable of assisting the identification identity of the door without sense opening/closing and judging the inside and outside of the door is required in the market at present.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for judging whether a target is inside or outside a door, which has the advantages of realizing non-inductive unlocking/door, simultaneously having low power consumption, lower cost and the like, and solves the problem that the function of non-inductive unlocking/door cannot be completely realized.
In order to achieve the purposes of realizing the non-inductive unlocking/door and simultaneously achieving low power consumption and lower cost, the invention provides the following technical scheme: a method for judging whether a target is inside or outside a door comprises
1) Firstly, respectively installing an inner UWB antenna module and an outer UWB antenna module at the inner side and the outer side of a door, and holding a movable UWB antenna tag on the hand of a user, wherein the UWB antenna tag can determine whether to enter a communication range by sending UWB broadcast frames to the inner UWB antenna module and the outer UWB antenna module;
2) When the UWB antenna tag enters a communication range, the inner UWB antenna module and the outer UWB antenna module conduct authorization judgment on the UWB antenna tag;
3) When the UWB antenna tag is an authorized user, the UWB antenna tag, the inner UWB antenna module and the outer UWB antenna module mutually send time information, and according to the time information, two flight time measurement values of ToF1 and ToF2 are calculated through a calculation formula;
4) Finally, the UWB antenna tag transmits ToF1 and ToF2 to a control node for controlling the door lock switch through wireless communication to perform judgment operation, and whether a user is in the door or out of the door is determined.
Preferably, the UWB broadcast frame in step 1 includes the identity information of the UWB antenna tag, and the information may be sent in a plaintext or ciphertext form according to an application requirement, and at the same time, the UWB chip of the UWB antenna tag records the time point T0 of the transmitting UWB broadcast frame and stores the time point T0 in its own storage unit, and then converts the UWB antenna tag into a receiving state to wait for a reply.
Preferably, the step 1 further includes if no inner UWB antenna module and no outer UWB antenna module receive and reply within the communication range, the UWB antenna tag exits the receiving state after waiting for a period of time, and determines a "far from door/no communication" state, and discards the time point information T0 recorded in the previous step, and the present round of communication ends.
Preferably, the authorization determination in step 2 includes that the inner UWB antenna module and the outer UWB antenna module compare the user identity information in the database when receiving the UWB broadcast frame, if the user identity is successfully matched, the authorization determination may be determined as an authorized user, otherwise, the authorization determination may be an unauthorized user, and if the authorization determination is determined as an unauthorized user, the inner UWB antenna module and the outer UWB antenna module only record the communication, do not respond and reply, and end the communication.
Preferably, the step 3 further includes recording a time stamp T1 of the reception of the UWB broadcast frame by the inner UWB antenna module after the reception and processing of the UWB broadcast frame by the inner UWB antenna module is completed when it is determined that the user is authorized, the inner UWB antenna module calculates the transmission time T2 of the next first UWB unicast frame to be transmitted by the inner UWB antenna module in advance through the own UWB chip, transmits the first UWB unicast frame containing the own identity information and the time information T1 and T2, and after the transmission is completed, the inner UWB antenna module finishes the round of communication;
the UWB antenna tag detects and receives a first UWB unicast frame, the target address is consistent with the target address, time information T1 and T2 of the first UWB unicast frame are read, the time point is recorded as T3 through a UWB chip of the UWB antenna tag, the UWB antenna tag keeps a receiving state after the time point is recorded as T3, and the UWB antenna tag can calculate ToF1 through a calculation formula.
Preferably, the step 3 further includes the step of after the external UWB antenna module receives and processes the UWB broadcast frame, recording a time stamp T4 of the external UWB antenna module receiving the UWB broadcast frame, and entering a waiting state; after waiting for a preset short time, the external UWB antenna module calculates the transmission time T5 of a next second UWB unicast frame to be transmitted in advance through the self UWB chip, transmits the second UWB unicast frame with the identity information and the time information T4 and T5 of the UWB antenna tag, and after the transmission is completed, the external UWB antenna module ends the round of communication;
the UWB antenna tag detects and receives a second UWB unicast frame, the target address is consistent with the target address, time information T4 and T5 of the second UWB unicast frame are read, the time point is recorded as T6 through a UWB chip of the UWB antenna tag, the UWB antenna tag finishes the round of communication after the time point is recorded as T6, and the UWB antenna tag can calculate ToF2 through a calculation formula.
Preferably, the calculation formula of ToF1 in the step 3 is ToF 1= (t3+t1-T0-T2)/2, and the calculation formula of ToF2 is ToF 2= (t6+t4-T0-T5)/2.
Preferably, the judging operation in the step 4 is to compare ToF1 and ToF2 through the control node, and if ToF1> ToF2, judge that the UWB antenna tag is out of the door; and judging that the UWB antenna tag is in the door if a plurality of ToFs 1 and 2 are included.
Compared with the prior art, the invention provides a method for judging whether a target is inside or outside a door, which has the following beneficial effects:
according to the method for judging whether the target is inside or outside the door, UWB communication is completed through matching of the UWB antenna tag and the inner UWB antenna module and the outer UWB antenna module to conduct ToF measurement, two flight time measurement values of ToF1 and ToF2 are obtained respectively, toF1 and ToF2 are compared, the mode that a target user is inside or outside the door is judged by adopting ToF flight time and arrival time difference of the ToF flight time, accurate induction is achieved, control is simple, advantages of low power consumption, low cost and the like are achieved while non-inductive unlocking/door is achieved, authorization judgment can be conducted when the UWB antenna tag is located at a preset induction distance, and the door lock is prevented from being unlocked maliciously or unlocked by mistake.
Drawings
FIG. 1 is a flow chart of a method for determining whether a target is inside or outside a door according to the present invention;
FIG. 2 is a schematic illustration of UWB signals according to a method of determining whether a target is inside or outside a door according to the present invention;
FIG. 3 is a schematic diagram of a method for determining whether a target is inside or outside a door according to the present invention;
fig. 4 is a schematic diagram of a method for determining whether a target is inside or outside a door according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to FIG. 1, a method for determining whether a target is inside or outside a door includes
1) An inner UWB antenna module and an outer UWB antenna module are respectively arranged on the inner side and the outer side of a door, a user holds a movable UWB antenna tag (Ultra Wide Band) on hand, the UWB antenna tag can determine whether the user enters a communication range by sending UWB broadcast frames to the inner UWB antenna module and the outer UWB antenna module, the UWB antenna tag carried by the user can send UWB broadcast frames with appointed frequencies (for example, three times a second), identity information of the tag is contained in the UWB broadcast frames, the UWB antenna tag can be in a plaintext or ciphertext form according to application requirements, and meanwhile, a UWB chip of the UWB antenna tag records a time point T0 of the time of transmitting the UWB broadcast frames and stores the time point T0 in a storage unit of the user, and then the UWB antenna tag is converted into a receiving state to wait for replying;
if the inner UWB antenna module and the outer UWB antenna module do not receive and reply in the communication range, the UWB antenna tag exits the receiving state after waiting for a period of time (such as 50 milliseconds) and judges as a state of being far away from the door/without communication, meanwhile, the time point information T0 recorded in the last step is abandoned, and the communication of the round is ended;
2) When the UWB antenna tag enters the communication range, the inner UWB antenna module and the outer UWB antenna module conduct authorization judgment on the UWB antenna tag, as the user approaches the door with the UWB antenna tag gradually, the inner UWB antenna module and the outer UWB antenna module can receive UWB broadcast frames of the UWB antenna tag initially and analyze the UWB broadcast frames, if the UWB broadcast frames are directly read in plaintext, the ciphertext is read after decryption, the inner UWB antenna module and the outer UWB antenna module compare user identity information in a database after analysis, if the user identity information is successfully matched, the user identity information can be judged as an authorized user, otherwise, the user is an unauthorized user, if the user is judged as an unauthorized user, the inner UWB antenna module and the outer UWB antenna module only record the communication, do not correspond and reply, and the communication is ended;
3) As shown in fig. 2, after the UWB antenna tag is an authorized user, the UWB antenna tag, the inner UWB antenna module and the outer UWB antenna module mutually transmit Time information, according to the Time information thereof, two Time of Flight measurement values (Time of Flight) of ToF1 and ToF2 are calculated through a calculation formula, specifically, if the UWB antenna tag is judged to be an authorized user, after the inner UWB antenna module receives and processes a UWB broadcast frame, the inner UWB antenna module records a Time stamp T1 of the UWB broadcast frame, and then the inner UWB antenna module calculates in advance a transmission Time T2 of a first UWB unicast frame to be transmitted next by itself through its own UWB chip, transmits the first UWB unicast frame including own identity information and Time information T1 and T2, and its transmission target device is only the UWB antenna tag, and after the transmission is completed, the inner UWB antenna module ends this round of communication;
the UWB antenna tag detects and receives a first UWB unicast frame, time information T1 and T2 of the first UWB unicast frame are read out because the target address is consistent with the target address, the time point is recorded as T3 through a UWB chip of the UWB antenna tag, the UWB antenna tag keeps a receiving state after the time point is finished, toF1 is calculated according to a UWB antenna tag calculation formula, and ToF 1= (T3+T1-T0-T2)/2 is calculated according to a calculation formula;
meanwhile, after the outer UWB antenna module receives and processes the UWB broadcast frame, the time stamp T4 of the outer UWB antenna module for receiving the UWB broadcast frame is recorded, and the waiting state is entered; after waiting for a preset short time, which is generally 5 milliseconds, the external UWB antenna module is used for waiting for the tag to complete the receiving of the first UWB unicast frame of the antenna 1, then calculates the next transmission time T5 of the second UWB unicast frame to be transmitted by the external UWB antenna module in advance through the own UWB chip, transmits the second UWB unicast frame with the identity information and the time information T4 and T5 of the UWB antenna tag, and the transmitting target device is only the UWB antenna tag, and after the transmission is completed, the external UWB antenna module ends the round of communication;
the UWB antenna tag detects and receives a second UWB unicast frame, time information T4 and T5 of the second UWB unicast frame are read out because the target address is consistent with the target address, the time point is recorded as T6 through a UWB chip of the UWB antenna tag, the UWB antenna tag finishes the round of communication after the completion, toF2 is calculated according to a UWB antenna tag calculation formula, and the ToF2 is calculated according to a calculation formula of ToF2= (T6+T4-T0-T5)/2;
4) Finally, the UWB antenna tag transmits ToF1 and ToF2 to a control node for controlling a door lock switch through wireless communication to judge whether a user is in a door or out of the door, and the wireless communication can adopt UWB, bluetooth, wifi and other modes, namely the UWB antenna tag, the inner UWB antenna module and the outer UWB antenna module complete UWB communication to realize ToF measurement, and two flight time measurement values of ToF1 and ToF2 are obtained respectively, as shown in fig. 3 and 4, the judging operation in the step 4 is to compare ToF1 and ToF2 through the control node, and if ToF1 is more than ToF2, the UWB antenna tag is judged to be out of the door; and if the ToF1 is less than the ToF2, judging that the UWB antenna tag is in the door, and finishing the judgment.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. A method for judging whether a target is inside or outside a door is characterized by comprising the following steps: comprising
1) Firstly, respectively installing an inner UWB antenna module and an outer UWB antenna module at the inner side and the outer side of a door, and holding a movable UWB antenna tag on the hand of a user, wherein the UWB antenna tag can determine whether to enter a communication range by sending UWB broadcast frames to the inner UWB antenna module and the outer UWB antenna module;
2) When the UWB antenna tag enters a communication range, the inner UWB antenna module and the outer UWB antenna module conduct authorization judgment on the UWB antenna tag;
3) When the UWB antenna tag is an authorized user, the UWB antenna tag, the inner UWB antenna module and the outer UWB antenna module mutually send time information, and according to the time information, two flight time measurement values of ToF1 and ToF2 are calculated through a calculation formula;
4) Finally, the UWB antenna tag transmits ToF1 and ToF2 to a control node for controlling the door lock switch through wireless communication to perform judgment operation, and whether a user is in the door or out of the door is determined.
2. The method for determining whether a target is inside or outside a door according to claim 1, wherein: the UWB broadcast frame in step 1 includes the identity information of the UWB antenna tag, and may send information in a plaintext or ciphertext form according to application requirements, and at the same time, the UWB chip of the UWB antenna tag records the time point T0 of this time of transmitting the UWB broadcast frame and stores the time point T0 in its own storage unit, and then converts the UWB antenna tag into a receiving state to wait for a reply.
3. A method of determining whether a target is inside or outside a door as claimed in claim 2, wherein: and step 1 further includes if the inner UWB antenna module and the outer UWB antenna module do not receive and reply within the communication range, the UWB antenna tag exits the receiving state after waiting for a period of time, and judges as a state of 'far from door/no communication', and meanwhile discards the time point information T0 recorded in the last step, and the communication of the present round is ended.
4. The method for determining whether a target is inside or outside a door according to claim 1, wherein: the authorization determination in the step 2 includes that the inner UWB antenna module and the outer UWB antenna module compare the user identity information in the database when receiving the UWB broadcast frame, if the user identity is successfully matched, the authorization determination can be determined as an authorized user, otherwise, the authorization determination is an unauthorized user, and if the authorization determination is determined as an unauthorized user, the inner UWB antenna module and the outer UWB antenna module only record the communication, do not respond and reply, and end the communication.
5. The method for determining whether a target is inside or outside a door according to claim 1, wherein: step 3 further includes when it is determined that the user is authorized, after the inner UWB antenna module receives and processes the UWB broadcast frame, recording a timestamp T1 of the receiving of the UWB broadcast frame by the inner UWB antenna module, and then, calculating, by the inner UWB antenna module, a transmission time T2 of a next first UWB unicast frame to be transmitted by the inner UWB antenna module in advance through an own UWB chip, transmitting a first UWB unicast frame including own identity information and time information T1 and T2, and ending the round of communication by the inner UWB antenna module after the transmission is completed;
the UWB antenna tag detects and receives a first UWB unicast frame, the target address is consistent with the target address, time information T1 and T2 of the first UWB unicast frame are read, the time point is recorded as T3 through a UWB chip of the UWB antenna tag, the UWB antenna tag keeps a receiving state after the time point is recorded as T3, and the UWB antenna tag can calculate ToF1 through a calculation formula.
6. The method of determining whether a target is inside or outside a door according to claim 5, wherein: the step 3 further includes that after the external UWB antenna module receives and processes the UWB broadcast frame, the external UWB antenna module records a time stamp T4 of the external UWB antenna module receiving the UWB broadcast frame and enters a waiting state; after waiting for a preset short time, the external UWB antenna module calculates the transmission time T5 of a next second UWB unicast frame to be transmitted in advance through the self UWB chip, transmits the second UWB unicast frame with the identity information and the time information T4 and T5 of the UWB antenna tag, and after the transmission is completed, the external UWB antenna module ends the round of communication;
the UWB antenna tag detects and receives a second UWB unicast frame, the target address is consistent with the target address, time information T4 and T5 of the second UWB unicast frame are read, the time point is recorded as T6 through a UWB chip of the UWB antenna tag, the UWB antenna tag finishes the round of communication after the time point is recorded as T6, and the UWB antenna tag can calculate ToF2 through a calculation formula.
7. The method of determining whether a target is inside or outside a door according to claim 6, wherein: the calculation formula of ToF1 in the step 3 is ToF 1= (t3+t1-T0-T2)/2, and the calculation formula of ToF2 is ToF 2= (t6+t4-T0-T5)/2.
8. The method for determining whether a target is inside or outside a door according to claim 1, wherein: comparing ToF1 and ToF2 through the control node, and judging that the UWB antenna tag is out of the door if ToF1> ToF2; and judging that the UWB antenna tag is in the door if a plurality of ToFs 1 and 2 are included.
CN202310925333.4A 2023-07-26 2023-07-26 Method for judging whether target is inside or outside door Pending CN117058800A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310925333.4A CN117058800A (en) 2023-07-26 2023-07-26 Method for judging whether target is inside or outside door

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310925333.4A CN117058800A (en) 2023-07-26 2023-07-26 Method for judging whether target is inside or outside door

Publications (1)

Publication Number Publication Date
CN117058800A true CN117058800A (en) 2023-11-14

Family

ID=88652701

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310925333.4A Pending CN117058800A (en) 2023-07-26 2023-07-26 Method for judging whether target is inside or outside door

Country Status (1)

Country Link
CN (1) CN117058800A (en)

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