CN108764418B - Attendance checking and personnel safety monitoring system and method based on wireless sensor network - Google Patents
Attendance checking and personnel safety monitoring system and method based on wireless sensor network Download PDFInfo
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- CN108764418B CN108764418B CN201811001513.9A CN201811001513A CN108764418B CN 108764418 B CN108764418 B CN 108764418B CN 201811001513 A CN201811001513 A CN 201811001513A CN 108764418 B CN108764418 B CN 108764418B
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- 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
- G06K17/0029—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 the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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- 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
- G06K19/0723—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 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/50—Context or environment of the image
- G06V20/52—Surveillance or monitoring of activities, e.g. for recognising suspicious objects
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
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- 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
- G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
- G07C1/10—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people together with the recording, indicating or registering of other data, e.g. of signs of identity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- 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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Abstract
The application discloses an attendance and personnel safety monitoring system and method based on a wireless sensor network, which are characterized in that a reader with a unidirectional radiation antenna and an omnidirectional radiation antenna is arranged at a position which is needed to be positioned in an entrance and a construction site and used for detecting the advancing direction and the position of a person wearing a tag and feeding back to a camera to further confirm the advancing direction.
Description
Technical field:
the application relates to the field of wireless sensors, in particular to an attendance checking and personnel safety monitoring system and method based on a wireless sensor network.
The background technology is as follows:
at present, with the acceleration of industrialization and urban progress, the construction of buildings and various sites is normal. There is an increasing concern about in-and-out flow of job site personnel and site-level safety monitoring. In the prior art, the method for identifying the entering and exiting directions of the personnel mainly comprises the following steps: a plurality of readers are respectively arranged on the access channel in the access direction, and when a person carrying the tag enters a monitoring area of the channel, if the reader outside the channel reads the tag, the person is judged to enter; when the reader in the channel reads the tag, the tag is judged to be out, and the tag does not have the capability of identifying the in-out direction. The RFID system adopts a multi-reading-head sequential association method to judge the entering and exiting directions, and a third party device (commonly called a front-end processor) is required to receive information such as a tag serial number sent by a reader, the time for reading the tag, a reader ID number and the like, and then judges the entering and exiting directions according to the sequence of reading the tag serial number, so that the system has complex structure and high cost; in addition, the reader is prone to abnormal conditions such as missed reading of the tag, incorrect reading time and the like, and can cause incorrect in-and-out direction discrimination. In addition, the RFID chip is worn on a worker, such as a safety helmet, one of the plurality of radio frequency locators in a plurality of local areas, which is nearest to the worker, is activated, positions the constructor, and judges the identity of the worker according to the ID information of the radio frequency chip.
Therefore, it is necessary to provide a construction site personnel safety monitoring and attendance system which is low in cost, simple in installation and high in positioning accuracy.
The application comprises the following steps:
the technical problems to be solved by the application are as follows: the system and the method for checking work attendance and personnel safety monitoring based on the wireless sensor network have the advantages of low cost, simple installation, high positioning precision and work attendance monitoring function.
The technical scheme of the application is as follows: the attendance and personnel safety monitoring system based on a wireless sensor network comprises a reader, an active tag and a graphic image acquisition device, wherein the reader comprises a first radio frequency transmitter and a second radio frequency transmitter which are used for transmitting radio frequency signals F1 and F2 with different frequencies, the first radio frequency transmitter is provided with a unidirectional radiation antenna and at least one reflector, the second radio frequency transmitter is provided with an omnidirectional radiation antenna, the reflector and the omnidirectional radiation antenna are arranged at two sides of the unidirectional radiation antenna, one radio frequency signal is transmitted through the unidirectional radiation antenna, the other radio frequency signal is transmitted through the omnidirectional radiation antenna, so that the two radio frequency signals are respectively covered on different geographic areas, the active tag comprising a radio frequency transceiver and a processor is covered by the two radio frequency signals, the radio frequency transceiver detects the radio frequency signals sent by the reader and then sends the tag serial number and the feedback signals to the reader, the processor judges the signal value returned to the reader according to the sequence and the signal intensity of the radio frequency signals F1 and F2 detected at the same time or only the received radio frequency signals F2, the reader judges the travelling direction and the position of the tag according to the signal value returned by the tag and the tag serial number ID, the travelling direction and the position information are transmitted to the monitoring control center for storage and display, the monitoring control center controls the graphic image acquisition device to acquire the video of the person carrying the active tag according to the received travelling direction and position information, the monitoring control center stores the acquired video and judges the motion trail of the person, the face of the person is extracted and identified in the video if the motion trail of the person in the video is confirmed to be consistent with the motion trail of the person obtained by the reader, and comparing the information with the personnel information carrying the labels stored in the database, if the information carrying the labels is consistent with the personnel information carrying the labels, checking the attendance successfully, if the information carrying the labels is inconsistent with the personnel information carrying the labels, checking the attendance unsuccessfully, and informing corresponding management personnel to check the personnel.
The radial direction of the signal coverage area of the radio frequency signal F1 is larger than that of the signal coverage area of the radio frequency signal F2, and the geographic area covered by the two paths of radio frequency signals is provided with an overlapped coverage area and a single coverage area; the tag adopts an intermittent detection mode to detect the radio frequency signal sent by the reader at regular time, when the tag detects the radio frequency signal F2, the tag immediately detects the radio frequency signal F1 at the same time, and when the tag does not detect the radio frequency signal F2, the tag enters dormancy again.
The active tag simultaneously detects the radio frequency signal F1 and the radio frequency signal F2, the tag returns a certain signal value D, the active tag returns a signal value S when detecting only the radio frequency signal F2, the reader judges the position of the active tag according to the received signal, and the sequence of the received return signals in a preset time judges the travelling direction of the tag.
The reader is respectively arranged at the position of the entrance and the exit and the position of the position, in the construction site, of personnel positioning, and the active tag is worn on the site personnel; the unidirectional radiation antenna is a directional antenna, and the omnidirectional radiation antenna is a dipole antenna.
The graphic image acquisition device is a camera with an automatic focusing function, which is arranged on the cradle head, the camera is provided with a gyroscope, and the monitoring control center is connected with a mobile communication terminal carried by a corresponding manager in a wireless manner; the information of the personnel carrying the tag stored in the database is collected and stored in advance, and the content of the information comprises a face image, personal information and active tag information corresponding to the face image and the personal information.
An attendance and personnel safety monitoring method based on a wireless sensor network comprises the following steps: A. the reader judges the travelling direction and the position of the tag according to the signal value returned by the tag and the tag serial number ID, and stores and displays the travelling direction and the position of the tag;
B. the monitoring control center controls the graphic image acquisition device to acquire video of the personnel carrying the active tag according to the received travelling direction and the received position information;
C. the monitoring control center stores the collected video and judges the motion trail of the personnel;
D. confirming whether the motion trail of the personnel in the acquired video is consistent with the motion trail of the personnel obtained by the reader; if the faces are consistent, extracting and identifying the faces of the personnel in the acquired video; if the attendance checking is unsuccessful, notifying corresponding management personnel to check the personnel;
E. after the face is extracted and identified, the face is compared with the personnel information with the labels stored in the database; if the attendance is consistent, the attendance is successful, if the attendance is inconsistent, the attendance is unsuccessful, and corresponding management personnel are informed to carry out personnel checking.
The step A comprises a reader, an active tag and a graphic image acquisition device, wherein the reader comprises a first radio frequency transmitter and a second radio frequency transmitter which are used for transmitting radio frequency signals F1 and F2 with different frequencies, the first radio frequency transmitter is provided with a unidirectional radiation antenna and at least one reflecting body, the second radio frequency transmitter is provided with an omnidirectional radiation antenna, the reflecting body and the omnidirectional radiation antenna are arranged at two sides of the unidirectional radiation antenna, one radio frequency signal is transmitted through the unidirectional radiation antenna, the other radio frequency signal is transmitted through the omnidirectional radiation antenna, the two radio frequency signals are respectively covered on different geographic areas, the active tag comprising a radio frequency transceiver and a processor is used for simultaneously detecting the radio frequency signal F1 and the radio frequency signal F2 and returning a certain signal value D, the reader judges the position of the active tag according to the received signal value returned, judges the travelling direction and the travelling direction of the tag in sequence of the received return signal in a preset time, controls the travelling direction and stores the travelling direction and the monitoring and the information in a monitoring and displaying mode.
The radial direction of the signal coverage area of the radio frequency signal F1 is larger than that of the signal coverage area of the radio frequency signal F2, and the geographic area covered by the two paths of radio frequency signals is provided with an overlapped coverage area and a single coverage area; the tag adopts an intermittent detection mode to detect the radio frequency signal sent by the reader at regular time, when the tag detects the radio frequency signal F2, the tag immediately detects the radio frequency signal F1 at the same time, and when the tag does not detect the radio frequency signal F2, the tag enters dormancy again.
The reader is respectively arranged at the position of the entrance and the exit and the position of the position, in the construction site, of personnel positioning, and the active tag is worn on the site personnel; the unidirectional radiation antenna is a directional antenna, and the omnidirectional radiation antenna is a dipole antenna.
The graphic image acquisition device is a camera with an automatic focusing function, which is arranged on the cradle head, the camera is provided with a gyroscope, and the monitoring control center is connected with a mobile communication terminal carried by a corresponding manager in a wireless manner; the information of the personnel carrying the tag stored in the database is collected and stored in advance, and the content of the information comprises a face image, personal information and active tag information corresponding to the face image and the personal information.
The beneficial effects of the application are as follows:
1. according to the application, the reader with the unidirectional radiation antenna and the omnidirectional radiation antenna is arranged at the position where personnel are required to be positioned in the gateway and the construction site, is used for detecting the advancing direction and the position of the personnel wearing the tag and feeding back to the camera to further confirm the advancing direction, has high identification accuracy, is simple in system structure, adopts the face recognition technology to check the personnel, prevents the situation of wrong card punching or card punching substitution caused by the carrying error of the active tag, and is convenient to operate, low in cost and easy to implement.
2. The unidirectional radiation antenna has directivity, the omnidirectional radiation antenna has comprehensiveness, the moving direction and the position of the tag are judged by detecting the front-back sequence of the tag passing through an antenna coverage area and two antenna overlapping areas, the camera is driven to rotate by the determined direction and position information, the video acquisition of the tag carrier is realized, whether the moving direction of the tag carrier in the video is consistent with the moving direction judged by the tag is judged, the moving direction is doubly confirmed, and the detection accuracy is ensured.
3. Under the condition of confirming the action direction, the face image of the person carrying the tag is extracted from the video acquired by the camera, identified and compared with the face information stored in the database, the tag of the person carrying the tag is determined, and the condition of attendance checking and card punching confusion caused by carrying a plurality of tags or carrying tags of other persons by one person is prevented.
4. The application takes the action direction and the position information obtained by the reader as the control input of the movement of the camera, realizes the tracking shooting of the tag carrier by the camera, judges the action direction of the tag carrier in the acquired video, and then compares and confirms the action direction obtained by the video with the action direction obtained by the reader, thereby ensuring the accuracy of the detection of the action direction.
5. The tag adopts an intermittent detection mode, the radio frequency signal sent by the reader is detected at regular time, when the tag detects the radio frequency signal F2, the radio frequency signal F1 is detected immediately and simultaneously, and when the tag does not detect the radio frequency signal F2, the tag enters dormancy again, so that the loss of electric energy is reduced.
6. According to the returned information S or D, the identity of the person wearing the ID tag returned by the person wearing the ID tag and the position of the person corresponding to the S or D are judged, so that the manager can conveniently and accurately position the person, and the position monitoring operation of the person is completed.
7. According to the application, the mobile communication terminal carried by the manager corresponding to the tag is connected wirelessly, and when the action direction is inconsistent or the face recognition is inconsistent, the manager corresponding to the detected active tag is notified to check the personnel through the mobile terminal.
8. The camera is provided with the gyroscope, the direction confirmation (A to B direction or B to A direction) is completed when the camera rotates is realized through the gyroscope, and the front and back sequence of frames in the acquired video and the contour parameters of the personnel in the video are combined, so that the movement direction of the personnel is finally determined.
Description of the drawings:
fig. 1 is a block diagram of a reader antenna unit;
fig. 2 is a schematic diagram of the reader antenna unit identifying the tag location and orientation.
Fig. 3 is a block diagram of the structural connections of the present application.
Fig. 4 is a block diagram of the method steps of the present application.
Fig. 5 is a schematic view of camera and gyroscope motion.
The specific embodiment is as follows:
examples: referring to fig. 1, 2, 3, 4 and 5, there is shown a 111-unidirectional radiating antenna, 12-opening, 113-reflector; the single coverage area of the 101-radio frequency signal F1, the overlapping coverage area of the 103-radio frequency signal F1 and the radio frequency signal F2, the single coverage area of the 102-radio frequency signal F2, the 13-channel and the 14-camera.
The attendance checking and personnel safety monitoring system and method based on the wireless sensor network comprises a reader, an active tag and a graphic image acquisition device; the readers are respectively arranged at the positions of the entrance and the exit and the position where personnel positioning is needed in the construction site, and the graphic image acquisition device is arranged at the side edge of the entrance and exit channel.
The reader is provided with two paths of radio frequency transmitters which are respectively used for transmitting radio frequency signals F1 and F2 with different frequencies; the two paths of radio frequency transmitters comprise an antenna unit and are provided with a unidirectional radiation antenna, at least one reflector and an omnidirectional radiation antenna, wherein the reflector is arranged on one side of the unidirectional radiation antenna, the omnidirectional radiation antenna is arranged on the other side of the unidirectional radiation antenna, one path of radio frequency signals is transmitted through the directional antenna, and the other path of radio frequency signals is transmitted through the omnidirectional radiation antenna, so that the two paths of radio frequency signals are respectively covered on different geographic areas. The active tag is worn on the field personnel and comprises a radio frequency transceiver for detecting radio frequency signals sent by the reader and sending tag serial numbers and corresponding information to the reader; and the processor is used for judging the signal value returned to the reader according to the sequence and the signal intensity of the detected radio frequency signals F1 and F2. And the reader judges the travelling direction and the position of the tag according to the signal value returned by the tag and the tag serial number ID.
The tag adopts an intermittent detection mode to detect the radio frequency signal sent by the reader at regular time. When the tag detects the RF signal F2, it immediately detects the RF signal F1 at the same time, and if F2 is not detected, it goes to sleep again. Because the wireless signal emitted by the unidirectional radiation antenna (directional antenna) of the reader has directivity, the signal only covers a certain direction area A of the unidirectional radiation antenna, the wireless signal emitted by the omnidirectional radiation antenna has no directivity, and the signal covers all direction areas A and B around the omnidirectional radiation antenna, therefore, the direction area A with the unidirectional radiation antenna signal has both unidirectional radiation antenna signal and omnidirectional radiation antenna signal, and the other directions have only omnidirectional radiation antenna signal. The geographic areas A and B are respectively set as two areas which pass through the access way in sequence, and the tag judges and judges the signal to be returned according to the sequence of receiving the omnidirectional radiation antenna signal and the unidirectional radiation antenna signal or only receiving the omnidirectional radiation antenna signal. When the tag is located at a construction site and the distance is maintained within a certain range, the tag may detect one of the omni-directional radiation antenna signal and the unidirectional radiation antenna signal, or receive only the omni-directional radiation antenna signal, return a certain signal D when the tag detects both the omni-directional radiation antenna signal and the unidirectional radiation antenna signal, return a signal S when the tag detects only the omni-directional radiation antenna signal, and the reader judges the direction of travel of the tag according to the received signal and the order of the return signals received within a predetermined time.
Transmitting the advancing direction and the position information to a monitoring control center for storage and display, controlling a graphic image acquisition device to acquire video of a person carrying an active tag by the monitoring control center according to the received advancing direction and the position information, storing the acquired video by the monitoring control center, judging the motion trail of the person, confirming that the motion trail of the person in the video is consistent with the motion trail of the person obtained by a reader, extracting and identifying the face of the person in the video, comparing the face of the person with the information of the person carrying the tag stored in a database, if the face of the person is consistent with the information of the person carrying the tag, checking the work attendance successfully, if the face of the person is inconsistent with the information of the person carrying the tag, notifying a corresponding manager to check the person.
The image acquisition device is a camera with an automatic focusing function arranged on the cradle head, and the monitoring control center is connected with a mobile communication terminal carried by a corresponding manager in a wireless manner. The information of the personnel carrying the tag stored in the database is collected and stored in advance, and the content of the personnel carrying the tag comprises a face image, personal information and active tag information corresponding to the face image and the personal information.
The working principle of recognizing the traveling direction by the reader will be described in detail with reference to fig. 1 and 2.
Fig. 1 is a block diagram of a reader antenna unit. The antenna unit of the reader is provided with a unidirectional radiation antenna, at least one reflector and an omnidirectional radiation antenna, wherein the reflector is arranged on one side of the unidirectional radiation antenna, the omnidirectional radiation antenna is arranged on the other side of the unidirectional radiation antenna, and the opening 12 of the unidirectional radiation antenna 111 corresponds to the reflector 113, preferably, the length of the reflector 113 is greater than the length of the unidirectional radiation antenna 111 and less than the length of the omnidirectional radiation antenna 112, so as to improve the directivity of the unidirectional radiation antenna 111. The omni-directional radiation antenna 112 may be a dipole antenna, and the camera is disposed beside the channel 13 and can track the position of the person, such as two sides of the channel 13.
Fig. 2 is a schematic diagram of the reader antenna unit identifying the tag location and orientation. The reader is arranged at a position O, the position O can be a place or an attendance gateway needing to be safely monitored for field personnel, and the reader simultaneously transmits 2 radio frequency signals with different frequencies through two paths of radio frequency transmitters, wherein the radio frequency signals comprise a radio frequency signal F1 and a radio frequency signal F2. The radio frequency signal F1 is a signal emitted by a directional antenna, the signal coverage area of which is spindle-shaped, and is a sector area 102 in the geographic area a; the radio frequency signal F2 is a signal emitted by an omnidirectional radiation antenna, the signal coverage area of the signal is a bread-loaf type, and the signal coverage area is a circular area 101 in a geographic area A and a geographic area B; and the radial direction of the signal coverage area of the radio frequency signal F1 is larger than the radial direction of the signal coverage area of the radio frequency signal F2, namely the intensity of the radio frequency signal F1 is larger than the intensity of the radio frequency signal F2.
For convenience of description, the embodiment of the application simplifies the spindle-shaped signal coverage area into a sector shape and simplifies the doughnut-shaped signal coverage area into a circular shape. The sector area 102, shown in fig. 2, is the signal coverage area of the rf signal F1 and is located in the geographic area a. The circular area 101 is a signal coverage area of the radio frequency signal F2, and is evenly distributed on the geographic area a and the geographic area B with a dividing line of the geographic area a and the geographic area B as a central axis. And the radius of the sector area is larger than the radius of the circular area. I.e. the area 101 shown in fig. 2 is covered with the rf signal F1 only, the area 103 is covered with both the rf signal F1 and the rf signal F2, and the area 102 is covered with the rf signal F2 only. The geographical areas a and B may represent the inner and outer areas of the construction site, for example, when the area a is the inner area of the construction site and the area B is the outer area of the construction site, the O point is the entrance attendance point (the tag carrying personnel sequentially enter the electromagnetic field area of the reader according to the arrangement sequence, and in order to prevent the collision problem occurring during multi-tag identification, the time when the tag enters the electromagnetic field area and the time when the next tag carrying personnel enter needs to be considered, so that the tag needs to be reminded of going through the electromagnetic field area, and the crowded or accompanied by the time when the tag needs to go through the electromagnetic field area), when the travelling direction of the tag is the direction from the geographical area B to the geographical area a, the tag firstly enters the area 101, and only the radio frequency signal F2 is detected and the radio frequency signal F1 is not detected; subsequently, the tag enters a common area (i.e., area 103) of the sector and the circular area, and the tag detects the rf signal F2 and also detects the rf signal F1, i.e., the tag detects the signal F2 first and then detects the signals F1 and F2. When the tag detects both the omni-directional radiation antenna signal F2 and the unidirectional radiation antenna signal F1, the tag returns a certain signal D and simultaneously returns a serial number ID of the tag, when the tag only detects the omni-directional radiation antenna signal F2, the tag returns a signal S and simultaneously returns a serial number ID of the tag, the reader judges the direction of the tag according to the received signal and the sequence of the received return signals within a preset time, at this time, the reader detects the ID of the tag and the signal DS, and the travelling direction of the tag is judged to be the travelling direction of the tag.
When the traveling direction of the tag is from the geographic area a to the geographic area B, the tag enters the area 103 first, and then the tag detects the radio frequency signal F2 and also detects the radio frequency signal F1, and the tag enters the area 101, and only detects the radio frequency signal F2 and does not detect the radio frequency signal F1; that is, when the tag detects signals F1 and F2 at the same time and then detects only signal F2, the reader detects the ID and signal SD of the tag, and determines that the traveling direction of the tag is away from the construction area. In the same manner, the area a may be set as the outside of the construction site, and the area B may be set as the inside of the construction site.
The method comprises the steps of receiving an active tag return signal value (SD or DS) at a reader, determining the action direction and position information of a person carrying the active tag, displaying the action direction and the position information on a display in a monitoring control center, taking the action direction and the position information as control input of camera movement, realizing tracking shooting of the person carrying the tag by the camera, judging the action direction of the person carrying the tag in an acquired video (confirmation of the direction when the camera rotates is realized through a gyroscope, such as a direction A to B or a direction B to A, finally determining the movement direction of the person by combining the front-back sequence of frames in the acquired video and the target profile parameters of the person in the video), comparing the action direction obtained by the video with the action direction obtained by the reader (whether the action direction is the direction A to B or the direction B to A), informing a manager corresponding to the detected active tag of the person through a mobile communication terminal to check the person (whether the staff on duty is up and down is finished or not); the action direction is consistent, extracting and identifying facial images of the person carrying the tag from the video acquired by the camera, comparing the facial images with facial information stored in the database, and determining the person carrying the tag to carry the tag when the facial information is consistent with the tag information, so as to finish the on-off work operation; when the facial information is inconsistent with the tag information, the tag personnel carries the tag of a non-self person, and the mobile communication terminal notifies the manager of the person corresponding to the detected active tag to perform personnel checking (whether to finish the on-off work or not).
In addition, the reader can be arranged at positions needing personnel positioning such as construction points, for example, disassembly or explosion points of building equipment and construction points needing outer and inner equipment installation by using a tower crane, other personnel except important construction personnel often need to be cleared away, when the reader detects that the tag returns a D signal, the identity of the tag wearing personnel and the position corresponding to the A area of the tag wearing personnel can be judged according to the returned ID, and when the S signal is received, the position corresponding to the B area of the tag wearing personnel is judged. Therefore, the manager can conveniently and accurately position the person, and the person is notified of the transfer if necessary.
The above description is only of the preferred embodiments of the present application, and is not intended to limit the present application in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical principles of the present application still fall within the scope of the technical solutions of the present application.
Claims (9)
1. The utility model provides an attendance and personnel safety monitoring system based on wireless sensor network, includes reader, active label and figure image acquisition device, characterized by: the reader comprises a first radio frequency transmitter and a second radio frequency transmitter which are used for transmitting radio frequency signals F1 and F2 with different frequencies, the first radio frequency transmitter is provided with a unidirectional radiation antenna and at least one reflector, the second radio frequency transmitter is provided with an omnidirectional radiation antenna, the reflector and the omnidirectional radiation antenna are arranged at two sides of the unidirectional radiation antenna, one radio frequency signal is transmitted through the unidirectional radiation antenna, the other radio frequency signal is transmitted through the omnidirectional radiation antenna, so that the two radio frequency signals are respectively covered on different geographic areas, an active tag comprising a radio frequency transceiver and a processor is covered by the two radio frequency signals, the radio frequency transceiver detects the radio frequency signals transmitted by the reader and then transmits the tag and a feedback signal to the reader, the processor judges a signal value returned to the reader according to the sequence and the signal intensity of the radio frequency signal F2 or only received by the radio frequency signal F2, the reader judges the travelling direction and the position of the tag according to the signal value returned by the tag sequence ID, the two radio frequency signals are transmitted through the omnidirectional radiation antenna, the active tag covers the two radio frequency transceiver and the two radio frequency signals respectively, the active tag is controlled by the omnidirectional radiation antenna and the omnidirectional radiation antenna, the active tag is controlled by the gyro is controlled by the camera and the control device to rotate the position of the camera and the camera is controlled to realize the acquisition of the movement direction of the image, the image is controlled and the image is controlled to be carried by the camera and the control the position of the camera is controlled to realize the acquisition and the movement of the image is controlled to realize the movement and the image acquisition and the control and the movement. Combining the front-back sequence of the frames in the acquired video and the target outline parameters of the personnel in the video, finally determining the movement direction of the personnel, confirming that the movement track of the personnel in the video is consistent with the movement track of the personnel obtained by a reader, and notifying the manager corresponding to the detected active tag to perform personnel checking through the mobile communication terminal if the movement direction is inconsistent or the personnel target outline is not present in the video; if the action directions are consistent, the faces of the personnel are extracted and identified in the video, and are compared with the personnel information carrying the labels stored in the database, if the action directions are consistent, the attendance is successful, if the action directions are inconsistent, the attendance is unsuccessful, and corresponding management personnel are notified to carry out personnel checking;
the active tag simultaneously detects the radio frequency signal F1 and the radio frequency signal F2, the tag returns a certain signal value D, the active tag returns a signal value S when detecting only the radio frequency signal F2, the reader judges the position of the active tag according to the received signal, and the sequence of the received return signals in a preset time judges the travelling direction of the tag.
2. The wireless sensor network-based attendance and personnel safety monitoring system as claimed in claim 1, wherein: the radial direction of the signal coverage area of the radio frequency signal F1 is larger than that of the signal coverage area of the radio frequency signal F2, and the geographic area covered by the two paths of radio frequency signals is provided with an overlapped coverage area and a single coverage area; the tag adopts an intermittent detection mode to detect the radio frequency signal sent by the reader at regular time, when the tag detects the radio frequency signal F2, the tag immediately detects the radio frequency signal F1 at the same time, and when the tag does not detect the radio frequency signal F2, the tag enters dormancy again.
3. The wireless sensor network-based attendance and personnel security monitoring system as claimed in any one of claims 1-2, wherein: the reader is respectively arranged at the position of the entrance and the exit and the position of the position, in the construction site, of personnel positioning, and the active tag is worn on the site personnel; the unidirectional radiation antenna is a directional antenna, and the omnidirectional radiation antenna is a dipole antenna.
4. The wireless sensor network-based attendance and personnel safety monitoring system as claimed in claim 1, wherein: the graphic image acquisition device is a camera with an automatic focusing function, which is arranged on the cradle head, the camera is provided with a gyroscope, and the monitoring control center is connected with a mobile communication terminal carried by a corresponding manager in a wireless manner; the information of the personnel carrying the tag stored in the database is collected and stored in advance, and the content of the information comprises a face image, personal information and active tag information corresponding to the face image and the personal information.
5. An attendance and personnel safety monitoring method based on a wireless sensor network comprises the following steps:
A. the reader judges the travelling direction and the position of the tag according to the signal value returned by the tag and the tag serial number ID, and stores and displays the travelling direction and the position of the tag;
B. the monitoring control center controls the graphic image acquisition device to acquire video of a person carrying an active tag according to the received travelling direction and position information, takes the action direction and position information obtained by the reader as control input of camera movement, and drives the camera to rotate through the determined direction and position information so as to realize tracking shooting of the person carrying the tag by the camera;
C. the monitoring control center stores the collected video, judges the motion trail of the personnel, confirms the direction when the camera rotates through the gyroscope, combines the front-back sequence of the frames in the collected video and the target profile parameters of the personnel in the video, and finally determines the motion direction of the personnel;
D. confirming whether the motion trail of the personnel in the acquired video is consistent with the motion trail of the personnel obtained by the reader; if the faces are consistent, extracting and identifying the faces of the personnel in the acquired video; if the attendance checking is unsuccessful, notifying corresponding management personnel to check the personnel;
E. after the face is extracted and identified, the face is compared with the personnel information with the labels stored in the database; if the attendance is consistent, the attendance is successful, if the attendance is inconsistent, the attendance is unsuccessful, and corresponding management personnel are informed to carry out personnel checking.
6. The attendance and personnel safety monitoring method based on the wireless sensor network as claimed in claim 5, wherein the method comprises the following steps: the step A comprises a reader, an active tag and a graphic image acquisition device, wherein the reader comprises a first radio frequency transmitter and a second radio frequency transmitter which are used for transmitting radio frequency signals F1 and F2 with different frequencies, the first radio frequency transmitter is provided with a unidirectional radiation antenna and at least one reflecting body, the second radio frequency transmitter is provided with an omnidirectional radiation antenna, the reflecting body and the omnidirectional radiation antenna are arranged at two sides of the unidirectional radiation antenna, one radio frequency signal is transmitted through the unidirectional radiation antenna, the other radio frequency signal is transmitted through the omnidirectional radiation antenna, the two radio frequency signals are respectively covered on different geographic areas, the active tag comprising a radio frequency transceiver and a processor is used for simultaneously detecting the radio frequency signal F1 and the radio frequency signal F2 and returning a certain signal value D, the reader judges the position of the active tag according to the received signal value returned, judges the travelling direction and the travelling direction of the tag in sequence of the received return signal in a preset time, controls the travelling direction and stores the travelling direction and the monitoring and the information in a monitoring and displaying mode.
7. The attendance and personnel safety monitoring method based on the wireless sensor network as claimed in claim 6, wherein the method comprises the following steps: the radial direction of the signal coverage area of the radio frequency signal F1 is larger than that of the signal coverage area of the radio frequency signal F2, and the geographic area covered by the two paths of radio frequency signals is provided with an overlapped coverage area and a single coverage area; the tag adopts an intermittent detection mode to detect the radio frequency signal sent by the reader at regular time, when the tag detects the radio frequency signal F2, the tag immediately detects the radio frequency signal F1 at the same time, and when the tag does not detect the radio frequency signal F2, the tag enters dormancy again.
8. The attendance and personnel safety monitoring method based on the wireless sensor network as claimed in claim 6, wherein the method comprises the following steps: the reader is respectively arranged at the position of the entrance and the exit and the position of the position, in the construction site, of personnel positioning, and the active tag is worn on the site personnel; the unidirectional radiation antenna is a directional antenna, and the omnidirectional radiation antenna is a dipole antenna.
9. The attendance and personnel safety monitoring method based on the wireless sensor network as claimed in claim 6, wherein the method comprises the following steps: the graphic image acquisition device is a camera with an automatic focusing function, which is arranged on the cradle head, the camera is provided with a gyroscope, and the monitoring control center is connected with a mobile communication terminal carried by a corresponding manager in a wireless manner; the information of the personnel carrying the tag stored in the database is collected and stored in advance, and the content of the information comprises a face image, personal information and active tag information corresponding to the face image and the personal information.
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| CN110533788B (en) * | 2019-08-14 | 2021-12-24 | 合肥智圣新创信息技术有限公司 | College student attendance system based on face recognition and online real-time data |
| CN111262954B (en) * | 2020-05-06 | 2020-08-21 | 深圳市图元科技有限公司 | Method, device and system for judging equipment synchronization |
| CN112651642A (en) * | 2020-12-29 | 2021-04-13 | 中水三立(北京)技术服务有限公司 | Hydraulic engineering field personnel safety management system based on multi-device perception |
| CN115994947B (en) * | 2023-03-22 | 2023-06-02 | 万联易达物流科技有限公司 | Positioning-based intelligent card punching estimation method |
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