An ultrahigh frequency signal auxiliary target recognition method, device and medium

Abstract

The application discloses a kind of ultra-high frequency signal auxiliary target identification method, device and medium, belong to automatic identification and data acquisition technical field, by the regional full-coverage layout method of ultra-high frequency signal transmitting device under the least number of ultra-high frequency signal transmitting device Realize signal full coverage in spacious operation area, and target object carries the unique fixed coding label capable of confirming identity information and obtains ultra-high frequency signal identification frequency, according to signal auxiliary target area identification method and target object in and out area state discrimination method, realize target object in the motion state Automatic real-time identification target object location area, in and out area state.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automatic identification and data acquisition, and particularly relates to an ultrahigh frequency signal assisted target identification method, device and medium. BACKGROUND

[0002] At present, large product assembly operation scenes such as ship and aircraft manufacturing have the characteristics of small production batch, long process flow, complex manufacturing process, and many resources used in the operation site. Meanwhile, the amount of various data and information generated in the discrete manufacturing process is very large. In most manufacturing enterprises with weak information construction capability, the data generated in the production and manufacturing process are recorded by manual recording, which leads to slow information transmission and is difficult to be acquired and uploaded in time, and cannot meet the functional requirements of production workshop visual monitoring and workshop manufacturing process resource information tracing. SUMMARY

[0003] To solve the above problems, the application provides an ultrahigh frequency signal assisted target identification method, device and medium. The ultrahigh frequency signal emission device area full coverage layout method is used to realize signal full coverage in a spacious operation area with the least number of ultrahigh frequency signal emission devices, and the target object carries a unique fixed code tag capable of confirming identity information and obtains the ultrahigh frequency signal identification times. According to the signal assisted target area identification method and the target object in-out area state discrimination method, the target object in the motion state is automatically and real-timely identified in the position area and the in-out area state.

[0004] The object of the application is achieved by the following technical scheme:

[0005] An ultrahigh frequency signal assisted target identification method comprises the following steps:

[0006] Step S1: ultrahigh frequency signal emission device area full coverage layout method;

[0007] Step S2: signal assisted target area identification method;

[0008] Step S3: target object in-out area state discrimination method.

[0009] Preferably, in the step S1, the number and layout spacing of the devices in the spacious fixed operation area are determined by the antenna emission angle and the farthest emission distance of the ultrahigh frequency signal emission device, so as to ensure signal full coverage of the entire area range with the least number of ultrahigh frequency signal emission devices.

[0010] Preferably, the step S1 comprises the following steps:

[0011] Step S11: ultra-high frequency signal transmitting device structure design: design an ultra-high frequency signal transmitting device which can transmit signals in four directions and adjust the transmitting angle and distance, so as to meet the signal coverage demand of wide operation area boundary;

[0012] Step S12: signal full coverage layout method: according to the antenna emitting angle and the farthest transmitting distance, design the device area layout method, determine the number of devices deployed in the area and the layout position interval, and ensure that the ultra-high frequency signal covers the entire area range and there is no signal coverage gap at the boundary.

[0013] Preferably, in step S2, according to the signal area full coverage layout method, deploy in the wide operation area and set corresponding sub-areas for each signal transmitting device, and according to the relationship between the antenna signal direction and the area position, divide the antennas into internal antennas and external antennas, compare the number of times of acquiring antenna signals of the same target object by multiple signal transmitting devices in the area, find the signal transmitting device with the maximum value, find the signal transmitting antenna with the maximum value in the signal transmitting device, and determine whether the target object is inside or outside the area according to the internal / external orientation of the antenna.

[0014] Preferably, in step S2, the following steps are included:

[0015] Step S21: acquiring the number of times of acquiring antenna signals of the target object: when the target object enters the ultra-high frequency signal full coverage area, the signal transmitting device M i acquires the signal identification number E Mi at a certain position; Mi ; i = 1, 2, …, the number of devices in the area μ; if ∑E Mi > 0, the target object O is inside the area; if ∑E Mi < 0, the target object O is outside the area;

[0016] Step S22: to further determine the specific sub-area of the target object inside the area, compare the signal identification number of the target object by each device in the area one by one and confirm the maximum device M i_max ; compare the signal identification number of the target object by each antenna in the device M i_max one by one and confirm the maximum antenna N j_max ; if N j_max is an internal antenna, the target object is inside the area and the position area is the corresponding area of the device M i ; if N j_max is an external antenna, the target object is outside the area.

[0017] Step S23: the target object enters the unlicensed area to issue an alarm: the target object is set with the area passing right, the position area of the target object is determined according to the method of S22, and it is determined whether there is the area passing right, if not, it is determined that the target object enters the unlicensed passing area, and the corresponding area device will issue an alarm signal.

[0018] Preferably, in step S3, the entering and exiting state of the target object is determined according to the signal-assisted target area identification method, such as entering the area or leaving the area.

[0019] Preferably, in step S3, the following steps are included:

[0020] Step S31: obtaining the signal identification times of the target object: the position area of the target object is confirmed by comparing the signal identification times of the target object at different times, the target object O is in the fixed area covered by the signal emission device M i The signal identification times at a certain time T are E OT ;

[0021] Step S32: determining the entering and exiting area state of the target object: the signal identification times of the target object at different times T are obtained according to step S31, and the position area of the target object at different times is determined according to step S2, if the target object enters from the outside of the area to the inside of the area in this period, it is entering; if the target object enters from the inside of the area to the outside of the area in this period, it is leaving.

[0022] A super high frequency signal emission device, comprising a polygonal column box, a PLC controller, an antenna control board and a signal conversion PCB board are arranged in the polygonal column box, at least two antennas are arranged on each side of the polygonal column box, the antennas are connected with the antenna control board, and the PLC controller is connected with the antenna control board and the signal conversion PCB board.

[0023] A super high frequency signal-assisted target identification medium, the identification medium is a label capable of actively emitting or passively reflecting signals, including but not limited to active / passive electronic tags or other carriers meeting the super high frequency signal transmission.

[0024] Preferably, the active / passive electronic tag is a common flexible tag or a PCB anti-metal tag.

[0025] The beneficial effects of the technical solution are as follows:

[0026] I. The application provides a kind of ultra-high frequency signal auxiliary target identification method, compared with existing visual target detection, bar code / 2D code recognition technology, the method is distinguished by the number of antenna signals obtained by multiple ultra-high frequency signal transmitting devices in the same target object in the region, can be identified in real time at a distance when target object moves in the ultra-high frequency signal coverage area in spacious working environment, determine the target object in and out area state, the position in the region, improve the target object in spacious working environment in the region identification accuracy, real-time acquisition target object in the region state information at any time.

[0027] II. The application provides an ultra-high frequency signal auxiliary target identification method, device and medium, the application provides a kind of ultra-high frequency signal transmitting device capable of emitting ultra-high frequency signal in four directions and proposes signal region full coverage layout method and signal auxiliary target region identification method, ensure that the entire region range is fully covered by the minimum number of ultra-high frequency signal transmitting devices, find out the maximum value of the ultra-high frequency signal transmitting device by comparing the number of antenna signals obtained by multiple ultra-high frequency signal transmitting devices in the same target object in the region, find out the maximum value of the signal transmitting antenna in the ultra-high frequency signal transmitting device, and determine whether the target object is inside or outside the region according to the inside / outside orientation of the antenna. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the schematic diagram of ultra-high frequency signal transmitting device in the application for emitting ultra-high frequency signal;

[0029] Figure 2 It is the structure schematic of ultra-high frequency signal transmitting device in the application Figure 1 ;

[0030] Figure 3 It is the structure schematic of ultra-high frequency signal transmitting device in the application Figure 2 ;

[0031] Figure 4 It is the layout schematic of ultra-high frequency signal transmitting device in the application Figure 1 ;

[0032] Figure 2 It is the layout schematic of ultra-high frequency signal transmitting device in the application Figure 6 ;

[0033] Figure 7 It is the signal distribution schematic of ultra-high frequency signal transmitting device in the application;

[0034] Figure 2 It is the schematic diagram of target object in and out state identification.

[0035] Wherein: 1, polygonal column box; 2, PLC controller; 3, antenna control board; 4, signal conversion PCB board; 5, antenna; 6, top cover handle; 7, top cover lock; 8, alarm lamp; 9, walking wheel. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, but the content of the present application is not limited to the present examples.

[0037] As shown in Figure 3 and Figure 1 , a kind of ultra-high frequency signal transmitting device, including polygonal column box 1, polygonal column box 1 is provided with PLC controller 2, antenna control board 3 and signal conversion PCB board 4, every face of the polygonal column box 1 is provided with at least two antennas 5 of top / bottom, antenna 5 is connected with antenna control board 3, the PLC controller 2 is connected with antenna control board 3 and signal conversion PCB board 4.

[0038] Wherein, polygonal column box 1 is four-face cuboid structure, and polygonal column box 1 includes four-face cuboid frame and shell arranged above four-face cuboid frame, the top cover of four-face cuboid frame upper end is rotationally arranged with four-face cuboid frame, to facilitate opening top cover.Top cover is provided with top cover handle 6, top cover lock 7 and alarm lamp 8, the setting of top cover handle 6 facilitates opening top cover;Top cover lock 7 is arranged to avoid non-work personnel to open top cover arbitrarily, cause unnecessary influence;Alarm lamp 8 is connected with PLC controller 2, for issuing warning;Polygonal column box 1 lower end is provided with 4 walking wheels 9, and the setting of walking wheel 9 facilitates the movement of a kind of ultra-high frequency signal transmitting device.

[0039] As shown in Figure 4 , the ultra-high frequency signal transmitting device of the present application is four-face cuboid structure, the structure has two antennas of top / bottom in each face and each antenna emits ultra-high frequency signal outward, wherein antenna signal is outward radiated with fixed angle β sector and the farthest distance of signal emission is L, while it is stipulated that the initial face of transmitting device is No.1 and No.2 antenna and the face is starting face according to the counterclockwise direction of the sequence of 8 antennas in transmitting device.

[0040] The ultra-high frequency signal emitting device is designed according to the field use environment layout and signal coverage range, is not the existing signal emitting device, eight antennas are arranged in the signal emitting device, and there are two antennas on each surface, the signal emitting direction, signal radiation height and signal area full coverage requirement can be met, unlike the common one-way signal emitting device on the market. Meanwhile, the ultra-high frequency signal emitting device can adjust the number and layout of the antennas in the emitting device according to the actual field use requirement, for example, the ultra-high frequency signal emitting device is designed as a five-edge column structure, 15 antennas are arranged in the interior and three antennas on each surface are composed, or other structures meeting the field use requirement can be used as the signal emitting device.

[0041] An ultra-high frequency signal auxiliary target identification medium, the identification medium is a tag capable of actively emitting or passively reflecting signals, including but not limited to active / passive electronic tags or other carriers meeting the ultra-high frequency signal transmission.

[0042] The active / passive electronic tag is a common flexible tag or a PCB anti-metal tag.

[0043] An ultra-high frequency signal auxiliary target identification method, including the following steps:

[0044] Step S1: ultra-high frequency signal emitting device area full coverage layout method;

[0045] Step S2: signal auxiliary target area identification method;

[0046] Step S3: target object in-out area state discrimination method.

[0047] In the step S1, the layout method ensures that the antenna signal can cover the entire fixed area.

[0048] In the embodiment, the length of a certain fixed area is D, the width is H, the position of the signal emitting device and the horizontal line of the area form an angle α (0≤α≤90°), the antenna signal emitting fan angle is β (0<β≤180°) and the signal emitting distance is L, m devices are placed in the horizontal direction of the area, n devices are placed in the vertical direction, and the number of devices deployed in the area is μ=2*(m+n)-4, wherein the area boundary length calculation formula is shown in formulas 1 and 2. The interval distance of each device placed in the horizontal direction of the area is d, the interval distance of each device placed in the vertical direction is h, if the antenna signal is fully covered in the area and there is no boundary gap, d×(m-1)≤D and h×(n-1)≤H need to be met.

[0049] H=L×sin(α+β / 2)×(m-1) (1)

[0050] D = 2L x sin(a + β / 2) x (n - 1) (2)

[0051] Suppose that 2 devices are placed horizontally and 2 devices are placed vertically in a certain area, the number of devices deployed in the area is 4, the angle of the sector of each device antenna signal transmission is β, and the signal transmission distance is l, at this time D'≤d and H'≤h.

[0052] H' = l x sin(a + β / 2) (3)

[0053] D' = 2l x sin(a + β / 2) (4)

[0054] According to the layout diagram of the ultra-high frequency signal transmission device, when the position of the ultra-high frequency signal transmission device and the angle a between the horizontal line of the area is smaller, the boundary area range formed by the signal in the area and the boundary position deviation is larger, and vice versa. Therefore, when a is selected as 45° in the interval range of a (0≤a≤90°), the target object recognition effect is best under the device layout scheme in the area. The signal full coverage device layout diagram when the position of the ultra-high frequency signal transmission device and the angle a between the horizontal line of the area is 45° is shown in FIG. 1; the signal full coverage device layout diagram when the position of the ultra-high frequency signal transmission device and the angle a between the horizontal line of the area is 0° is shown in FIG. 2. Figure 5 Figure 6

[0055] In step S2, the specific content of the signal-assisted target area recognition method of the present application is as follows: the method identifies the target object in the sub-area of the signal coverage area according to the signal strength, and alarms the non-authorized target object in the area.

[0056] According to the above signal area full coverage layout method, 6 ultra-high frequency signal transmission devices are deployed around the above-mentioned fixed area to meet the full coverage of the antenna signal in the area. Among them, according to the layout position of the ultra-high frequency signal transmission device, the area is divided into four sub-areas I, II, III and IV, as shown in FIG. 3 and FIG. 4, the parameter setting table of each antenna signal transmission device of the 6 ultra-high frequency signal transmission devices in the area is shown in Table 1. Figure 7 Target object

[0057]

[0058]

[0059]

[0060] ​​​​​For the convenience of describing the ultra-high frequency signal transmitting device and the antenna in the area, the ultra-high frequency signal transmitting device is denoted as M, the antenna in the ultra-high frequency signal transmitting device is denoted as N, the target object is denoted as O, the signal identification times in a unit time is denoted as E, wherein the ultra-high frequency signal transmitting device is denoted as i, the antenna is denoted as j, and the target object is denoted as k, then the ultra-high frequency signal transmitting device is denoted as M i , the antenna is denoted as N j , and the target object is denoted as O k . Meanwhile, according to the relationship between the antenna signal transmitting direction and the area position, the antenna is divided into an internal antenna and an external antenna, so that the antenna transmitting direction in the area internal is denoted as N j内 , and the antenna transmitting direction in the area external is denoted as N j外 .

[0061] The target object O enters the ultra-high frequency signal full coverage area, and the ultra-high frequency signal transmitting device M i acquires the signal identification times E Mi at a certain position, and the antenna N i in the ultra-high frequency signal transmitting device M j recognizes the target object O at the position for E MiNj times.

[0062]

[0063] , wherein N j is the serial number of each antenna N in the ultra-high frequency signal transmitting device (j = 1, 2, 3, 4, 5, 6, 7, 8), M i is the serial number of the ultra-high frequency signal transmitting device M in the area (i = 1, 2, …, the number of devices μ in the area), a is the number of internal antennas arranged in the ultra-high frequency signal transmitting device, and b is the number of external antennas arranged in the ultra-high frequency signal transmitting device.

[0064] In order to determine whether the target object O is in the area internal at a certain position, the signal identification times of the target object O acquired by all the ultra-high frequency signal transmitting devices in the area are summed up, and the formula is expressed as ∑E Mi (i = 1, 2, …, the number of ultra-high frequency signal transmitting devices μ in the area). If ∑E Mi > 0, the target object O is in the area internal; if ∑E Mi < 0, the target object O is in the area external.

[0065] Meanwhile, in order to further determine the specific sub-area of the target object in the area internal, the signal identification times of the target object by each device in the area are compared one by one, and the maximum ultra-high frequency signal transmitting device M i_max is confirmed, and the ultra-high frequency signal transmitting device M i_maxThe number of times each antenna recognizes the target object signal and determines the largest antenna N j_max , as shown in Equations 6 and 7. If N j_max If it is an internal antenna, the target object is inside the area and the sub-area where it is located is the UHF signal transmitting device M i The corresponding area; if N j_max If it is an external antenna, the target object is outside this area.

[0066] E Mi_max =max E Mi (i= 1,2,…, number of UHF signal transmitters in the area μ) (6)

[0067] E Nj_max =max E Mi_max-Nj (j=1,2,3,4,5,6,7,8) (7)

[0068] Assume that the target object O1 enters the signal full coverage area and is detected by the UHF signal transmitter M at a certain position. i UHF signal transmitter M with the largest number of signal recognitions i_max The corresponding device is device 1, and the antenna N with the largest number of signal recognition times in the UHF signal transmitting device 1 j_max The corresponding antenna is antenna 1 and it is an internal antenna, so the sub-area where the target object is located is I; the target object O2 enters the signal full coverage area and is detected by the signal transmitting device M at a certain position. i UHF signal transmitter M with the largest number of signal recognitions i_max The corresponding antennas are UHF signal transmitters 2 and 3, and the antenna N with the largest number of signal recognition times in UHF signal transmitter 2 j_max The corresponding antenna is the internal antenna 2, and the antenna N with the largest number of signal recognition times in the UHF signal transmitter 2 j_max The corresponding antenna is antenna 7 and it is an internal antenna, so the sub-area where the target object is located is II.

[0069] To ensure access control within the area, different target objects O are assigned corresponding access zone permissions, as shown in Table 2. When a target object enters an unauthorized access zone, the corresponding UHF signal transmitter will issue an alarm signal. Assuming that target object O1 has access zone permissions of I, III, or IV, if O1 is detected in access zone II, the device will issue an alarm signal to drive the target object away.

[0070] Table 2 Target object access permission setting table

[0071] Access area authority Figure 5 O1 Ⅰ、Ⅲ、Ⅳ O2 Ⅰ、Ⅱ … … O k ]]> Ⅱ、Ⅲ、Ⅳ

[0072] The specific content of the target object entry and exit status determination method of the present invention is as follows: the method determines the entry and exit status of the area according to the location of the target object at different times.

[0073] In order to improve the recognition effect of the target object's auxiliary area position and entry and exit status, the target object O is confirmed to be in the area by comparing the number of signal recognition times obtained at different times, and the target object's entry and exit status is analyzed according to the movement trend of the target object's position at different times. The target object O is detected by the signal transmitter M when it enters the fixed area covered by the ultra-high frequency signal. i At a certain time T, the number of signal recognitions is E OT .

[0074] Assume that the target object O obtains the signal recognition times E at T1, T2, T3, and T4. OT1 、E OT2 、E OT3 、E OT4 ,like ​ According to the above target object auxiliary area recognition method, it can be seen that the target object O has the largest number of signals obtained by the ultra-high frequency signal transmitter M4 at time T1 and the antenna M 4_max-N5 The target object O is an external antenna. At time T2, the UHF signal transmitter M1 obtains the maximum number of signals and the antenna M 1_max-N7 The target object O is an external antenna. At time T3, the UHF signal transmitter M1 obtains the maximum number of signals and the antenna M 1_max-N1 The target object O has the largest number of signals acquired by the UHF signal transmitter M2 at time T4 and the antenna M 2_max-N8 Therefore, from T1 to T4, the target object O enters the area from outside to inside and finally stays inside the area. In this period, the target object is in the approaching state, that is, it enters the area from outside to inside.

[0075] Finally, it should be noted that the above embodiments are only for illustration, not for limitation of the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for target recognition assisted by ultra-high frequency signals, characterized in that: The following steps are involved: Step S1: A method for fully covering the area of ​​an ultra-high frequency signal transmitting device; Step S2: Signal-assisted target area identification method; deploy in a spacious operating area according to the signal area full coverage layout method and set a corresponding sub-area for each signal transmitting device. At the same time, the antenna is divided into internal antennas and external antennas according to the relationship between the antenna transmission signal direction and the regional position. The number of times multiple signal transmitting devices in the area obtain antenna signals for the same target object is compared to find the signal transmitting device with the largest value. At the same time, find the signal transmitting antenna with the largest value among the signal transmitting devices. According to the internal / external direction of the antenna, it is determined whether the target object is inside or outside the area; including the following steps: Step S21: Get the number of times the target object gets the antenna signal: The target object enters the UHF signal full coverage area and is detected by the signal transmitting device. M i The number of signal recognitions obtained at a certain location is E Mi , by summing up the number of times all devices in the area obtain signal recognition for the same target object ∑E Mi ; i =1,2,…,number of devices in the area μ ; Among them, if ∑E Mi >0, the target object O Within this area; if ∑E Mi <0, then the target object O Outside the area; Step S22: To further determine the specific sub-area within the area where the target object is located, compare the number of times each device in the area recognizes the target object signal and determine the device with the largest number of recognitions. M i_max , comparing devices one by one M i_max The number of times each antenna recognizes the target object signal and determines the largest antenna N j_max ,like N j_max If it is an internal antenna, the target object is inside the area and the location area is the device M i The corresponding area of ​​; if N j_max For an external antenna, the target object is outside the area; Step S23: Target object enters unauthorized area and issues an alarm: Set regional access permissions for the target object, determine the target object's location area according to the method in S22 and determine whether it has access permissions to the area. If not, it is determined that the target object has entered an unauthorized access area and the corresponding area device will issue an alarm signal; Step S3: Method for determining whether the target object enters or exits the area.

2. The method for target recognition using an ultra-high frequency signal according to claim 1, wherein: In step S1, the number of devices and the layout spacing within the spacious fixed operating area are determined by the antenna transmission angle and the maximum transmission distance of the UHF signal transmitting device, ensuring that the signal fully covers the entire area with the minimum number of signal transmitting devices.

3. The method for target recognition using an ultra-high frequency signal according to claim 2, wherein: The step S1 includes the following steps: Step S11: Design of the UHF signal transmitter structure: Design an UHF signal transmitter that transmits in four directions and has adjustable transmission angle and transmission distance, so as to meet the signal coverage requirements at the boundary of a spacious working area; Step S12: Signal full coverage layout method: Design the device area layout method based on the antenna transmission angle and the maximum transmission distance, determine the number of devices deployed in the area and the layout position interval, to ensure that the UHF signal covers the entire area and there is no signal coverage gap at the boundary.

4. The method for target recognition using an ultra-high frequency signal according to claim 3, wherein: In step S3, the entry and exit status of the target object is determined according to the signal-assisted target area recognition method: entering the area or leaving the area.

5. The method for target recognition assisted by an ultra-high frequency signal according to claim 4, characterized in that: The step S3 includes the following steps: Step S31: Obtain the target object signal recognition times: By comparing the target object signal recognition times at different times, the target object is located in the area. O When entering the fixed area covered by the UHF signal, the signal transmitting device M i At some point T The number of signal recognitions is E OT ; Step S32: Determine the target object's entry and exit status: According to step S31, obtain the target object's status at different times. T The number of signal recognitions is calculated, and the location of the target object at different times is determined according to step S2. If the target object enters the area from outside the area to inside the area during this period, it is considered as entering the area; if the target object enters the area from inside the area to outside the area during this period, it is considered as leaving the area.

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