CN106403842B - Electronic tracking system and method for target object - Google Patents
Electronic tracking system and method for target object Download PDFInfo
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- CN106403842B CN106403842B CN201610930041.XA CN201610930041A CN106403842B CN 106403842 B CN106403842 B CN 106403842B CN 201610930041 A CN201610930041 A CN 201610930041A CN 106403842 B CN106403842 B CN 106403842B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/10—Different kinds of radiation or particles
- G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
- G01N2223/1016—X-ray
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Abstract
The invention provides an electronic tracking system of a target object, which comprises a control system, a scanning system used for identifying the advancing object on a conveying device, a marking system and a monitoring system used for positioning the target object in an area to be detected, wherein the control system is in communication connection with the scanning system, the marking system and the monitoring system, the scanning system is provided with an X-ray machine, the monitoring system comprises a positioning sensing device, an image acquisition device and a mobile device which are distributed in the monitoring area, the marking system is provided with an electronic tag and a marking mechanism for automatically attaching the electronic tag to the target object, the scanning system is further provided with a sensing door which is arranged in front of the X-ray machine along the conveying direction of the object, and a laser range finder and a camera unit for acquiring image information of the target object and the attaching action are arranged on the sensing door. The electronic tracking system of the target object is convenient for accurately positioning and searching the target object, reduces the omission factor and improves the security inspection efficiency.
Description
Technical Field
The invention relates to the technical field of security inspection, in particular to an electronic tracking system and method for a target object.
Background
With the increase of international flights year by year, the number of international arrival luggage items is increasing, the current security check mode of the customs department for the arrival items is the mode that a security checker performs manual sampling check or passengers declare the arrival items by themselves, and the mode of performing sampling check by depending on the working experience of the security checker may cause that the target items are not sampled and checked, the working difficulty is high, but if the sampling check amount is increased, the passing efficiency is reduced.
Therefore, there is a need to provide an electronic tracking system and method for a target object to overcome the above problems.
Disclosure of Invention
The invention aims to provide an electronic tracking system and method for a target article, which are used for comprehensively checking an article to be detected so as to determine the target article and automatically positioning and tracking the target article.
In order to achieve the above object, the present invention provides an electronic tracking system for a target object, comprising a control system, a scanning system for identifying an advancing object on a conveying device, a marking system, and a monitoring system for positioning the target object in an area to be detected, wherein the control system is in communication connection with the scanning system, the marking system, and the monitoring system, the scanning system is provided with an X-ray machine, the monitoring system comprises a positioning sensing device, an image acquisition device and a mobile device distributed in the monitoring area, the marking system is provided with an electronic tag and a marking mechanism for automatically attaching the electronic tag to the target object, the scanning system is further provided with a sensing door arranged in front of the X-ray machine along the conveying direction of the object, the sensing door is provided with a laser range finder and a camera unit for collecting image information of the target object and the attaching action, the electronic tracking system is characterized in that an area to be detected where the electronic tracking system is located is divided into subareas which are in latticed distribution and have different numbers, at least one positioning sensing device is correspondingly arranged in each subarea, the number of each subarea is associated with the positioning sensing device corresponding to the subarea in a database of the control system, the electronic tracking system is provided with two positioning sensing devices with different sensitivities at an outlet of the area to be detected of the electronic tracking system so as to form concentric circle monitoring, the marking mechanism comprises a mechanical arm with six degrees of freedom, the electronic tags are communicated with the control system and the monitoring system, each electronic tag has a unique identification code, each electronic tag is provided with a magnetic control switch and a photosensitive sensor for realizing anti-disassembly alarm, and the magnetic control switch can enable the electronic tags to be activated into a working mode under the triggering of the marking mechanism, the electronic tag comprises a conveying device, a plurality of positioning plates and an image acquisition device, wherein the conveying device is provided with the positioning plates at intervals for acquiring the position information of a target object, and the image acquisition device is triggered to acquire image information when the target object attached to the electronic tag leaves the conveying device.
As a further improvement of the present invention, the sensor gate is provided with a communication interface connected to the control system, the laser range finder is configured to collect three-dimensional characteristic information of the target object, and a distance between the X-ray machine and the sensor gate in the object conveying direction is in a range of 1 to 10 meters.
As a further improvement of the present invention, the distance between the sensor gate and the robot arm in the conveying direction of the article ranges from 0.5m to 6 m.
As a further improvement of the invention, the marking mechanism is also provided with a displacement sensor and a proximity sensor for sensing the displacement of the mechanical arm.
In order to achieve the above object, the present invention further provides an electronic tracking method for a target object, comprising the following steps: the X-ray machine scans the object to be detected running on the conveying device to determine whether the object to be detected belongs to the target object; if the target object does not belong to the target object, releasing; if the electronic tags belong to the target object, the control system gives a corresponding instruction when the target object passes through the sensing door, the laser range finder arranged on the sensing door obtains the three-dimensional characteristics of the target object, the control system gives a marking instruction, the marking mechanism gives a marking action at the preset time and preset position given by the control system so as to automatically attach the electronic tags to the target object, the marking mechanism comprises a mechanical arm with six degrees of freedom, the electronic tags are communicated and connected with the control system and the monitoring system, each electronic tag is provided with a unique identification code, each electronic tag is provided with a magnetic control switch and a photosensitive sensor for realizing anti-disassembly alarm, the magnetic control switch can enable the electronic tag to be activated to enter a working mode under the trigger of the marking mechanism, and the conveying device is provided with a plurality of positioning plates at intervals for obtaining the position information of the target object, the electronic tag triggers the image acquisition device to acquire image information when a target object attached to the electronic tag leaves the conveying device, meanwhile, a camera unit arranged on the sensing door acquires images of the target object and the marking action, the monitoring system monitors the movement of the target object in the area to be detected in real time, and suspicious behaviors of the target object are discovered and notified to the control system;
the real-time monitoring of the activity of the target object in the area to be detected by the monitoring system specifically comprises the following steps:
dividing the area to be detected into a plurality of sub-areas which are arranged in a grid shape, numbering each sub-area, arranging positioning induction devices which are arranged corresponding to the sub-areas in the area to be detected, arranging at least one positioning induction device in each sub-area, and associating the numbering of each sub-area with the positioning induction device corresponding to the sub-area in a database of a control system; the electronic tracking system is provided with two positioning induction devices with different sensitivities at an outlet of a region to be detected of the electronic tracking system so as to form concentric circle-shaped monitoring.
As a further improvement of the present invention, the monitoring system includes a plurality of positioning sensing devices arranged in a grid shape, the positioning sensing devices transmit sensed electronic tag information to the control system, the control system transmits the electronic tag information and the position information of the target object to the mobile device, the electronic tag triggers an alarm signal when the target object is manually removed, stays in the same sub-area for a long time or is disconnected, and the control system sends a checking instruction to the target object triggering the alarm signal before the target object passes through the exit position.
The invention has the beneficial effects that: the electronic tracking system for the target object can carry out comprehensive coverage inspection on the articles arriving at the port, and when the scanning system detects the target object, the marking system carries out marking processing on the target object and carries out image information acquisition on the target object and the marking action so as to accurately position and search the target object, reduce the omission ratio and improve the security inspection efficiency; and (3) under the monitoring of the positioning induction devices distributed in a grid shape, alarming and processing suspicious behaviors of target objects attached to the electronic tags in time, and intercepting in a targeted manner.
Drawings
FIG. 1 is a schematic diagram of an electronic tracking system for a target item of the present invention.
Fig. 2 is a flow chart of the electronic tracking method for the target object according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
Referring to fig. 1 to fig. 2, a preferred embodiment of an electronic tracking system 100 for a target object of the present invention is shown. The electronic tracking system for the target object comprises a control system 10, a scanning system 20 for detecting the object to be detected moving forwards on a conveying device, a marking system 30 for marking the target object and a monitoring system 40, wherein the control system 10 is in communication connection with the scanning system 20, the marking system 30 and the monitoring system 40. In this embodiment, the conveying device is a conveyor belt.
The scanning system 20 includes an X-ray machine 21, a sensor gate 22, and a laser range finder 23 and a camera unit 24 disposed on the sensor gate 22. The X-ray machine 21 scans the object to be detected on the conveying device, and transmits the scanned image information to the control system 10 to analyze and confirm whether the object belongs to the target object, that is, whether label pasting processing is needed, and the object is directly released for the non-target object; for the target item, the control system 10 transmits a decision command to the sensor gate 22. The laser range finder 23 arranged on the sensing door 22 scans the target object again to obtain three-dimensional characteristic information of the target object, and transmits the three-dimensional characteristic information to the control system 10 to extract characteristics such as the outline of the target object. The sensing door 22 is provided with a communication interface connected with the control system 10 to inform the control system 10 that the target object passes through and transmit the three-dimensional characteristic information collected by the laser range finder 23. The control system 10 calculates the operation time point of the marking system 30 and the coordinate information of the labeling position according to the three-dimensional characteristic information of the target object, the conveying speed of the conveying device and the time delay, so as to inform the marking system 30 and enable the marking system 30 to quickly find the labeling position.
In this embodiment, the sensor gate 22 is preferably gate-shaped, and in other embodiments, may have other forms. The distance range L1 between the X-ray machine 21 and the sensor gate 22 in the article conveying direction is 1 meter to 10 meters. When the distance between the X-ray machine 21 and the sensor gate 22 is too close, the setting position and the working performance of the marking system 30 will be affected; when the distance between the X-ray machine 21 and the sensor gate 22 is too long, the selection of the determination target is affected, the determination result has an error due to the unstable transmission speed of the transmission device, and the larger the distance is, the larger the error is, the larger the distance is, and the label is misattached.
The invention realizes non-contact high-precision measurement by utilizing the sensing door 22 and the laser range finder 23, and does not cause any contamination and damage to target objects; and the operability is strong, and articles made of various materials can be measured.
The marking system 30 has an electronic tag 31 and a marking mechanism 32 for automatically attaching the electronic tag 31 to a target article. The electronic tags 31 are packaged into a roll to form a tag disc, and are attached to the outer surface (generally, the center of a flat part) of a target object after being picked up by the marking mechanism 32, the electronic tags 31 are in communication connection with the control system 10 and the monitoring system 40, and each electronic tag 31 has a unique identification code, and the range of the identification code which can be identified and sensed is 20 meters. Meanwhile, each electronic tag 31 is provided with a magnetic switch and a photosensitive sensor, and the magnetic switch can activate the electronic tag 31 to enter a normal working mode under the touch of the marking mechanism 32. In this embodiment, the photosensitive sensor is a photo resistor, and is used to provide an alarm signal to the control system 10 when the electronic tag is damaged or torn off, so that the electronic tag 31 has a tamper alarm function.
In this embodiment, the marking mechanism 32 has a robot 321, and the distance L2 between the sensor gate 22 and the robot 321 in the conveying direction of the article is 0.5m to 6 m, which will affect the extending operation of the robot 321 if the distance between the sensor gate 22 and the robot 321 is too close to be less than 0.5 m; if the distance is too far, the accuracy of the position measurement of the target object by the sensor gate 22 will be affected.
In the present embodiment, the mechanical arm 321 is mainly a ratchet mechanism and has 6 degrees of freedom. The mechanical arm 321 is provided with a suction cup for picking up the electronic tag 31, an electromagnet for activating the electronic tag 32, and a pressure sensor. After the sucking disc sucks the electronic tag, the electronic tag 31 is attached to a preset position of a target object according to an instruction transmitted by the control system 10, the electromagnet activates the electronic tag, and the pressure sensor measures the pressure when the mechanical arm 321 attaches the electronic tag to the target object and compares the pressure with a pressure parameter stored in the control system 10 to determine whether the marking action is finished.
While the marking system 30 marks the target object, the camera unit 24 of the scanning system 20 acquires an image of the target object, and transmits the acquired image information to the control system 10 to be associated and matched with the corresponding electronic tag 31 attached to the marking system 30 and to be stored in the database.
The marking mechanism 32 is further provided with a displacement sensor 322 and a proximity sensor 323 for sensing the displacement of the mechanical arm, so that the fixed angle and the fixed displacement are realized, and the accurate position labeling is further realized. The marking mechanism 32 further has an air cylinder, the electronic tag is attached to the target object by the pushing force of the air cylinder, and the air cylinder drives the tag tray to move a certain position (i.e., pick up the tag) when acting, and meanwhile, preparation is made for the next marking process.
The monitoring system 40 includes a positioning sensing device 41, an image capturing device 42 distributed in a monitoring area, and a mobile device 43.
The area to be inspected (such as an airport lobby) is divided into a plurality of sub-areas in a grid-shaped manner, each sub-area is numbered, at least one positioning induction device 41 is correspondingly arranged in each sub-area, and the number of each sub-area is associated with the positioning induction device 41 corresponding to the sub-area in a database. One of the electronic tags is sensed by a certain positioning sensing device 41, which means that the article attached to the electronic tag is located in the sub-area corresponding to the positioning sensing device 41.
In this embodiment, the positioning sensing device 41 is a radio frequency sensor, and the positioning sensing device 41 can be installed on the ground, wall, pillar, guide belt, etc., and the specific installation position can be determined according to the actual situation of the area to be inspected.
A plurality of image acquisition devices 42 for monitoring the target object are arranged in the region to be inspected, and a plurality of the image acquisition devices 42 are preferably arranged at the top of the region to be inspected. The image capturing device 42 performs auxiliary video monitoring, and when an alarm signal occurs in a sub-area, the image capturing device 42 can perform auxiliary viewing.
The electronic tag 31 has the auxiliary functions of taking a piece, triggering and taking a picture and the like, and is further provided with at least one image acquisition device 42, when the target object reaches a piece taking area and the corresponding positioning plate of the piece taking area senses that the luggage leaves the conveying device, the image acquisition device 42 at the piece taking position is triggered to acquire and store image information of the target object and a piece taking person.
The control system 10 continuously pushes the information related to the target item to the mobile device 43 to realize the real-time positioning display. The image information and real-time location of the target item may be displayed by an application within the mobile device 43.
Two positioning and sensing devices 41 with different sensitivities (a strong one and a weak one) are installed at the customs exit, for example, a radio frequency positioning sensor and a short-range radio frequency sensing device are combined for use to form concentric circle arrangement, so that the positioning precision is improved, and the positioning and sensing devices 41 are arranged in multiple directions to ensure that no security inspection dead angle exists at the exit. When the target object is located at a position far away from the exit, the number of the area where the target object is located and the image information of the target object will be displayed on the mobile device 43; when the target object is close to the customs exit, the radio frequency induction devices with different sensitivities are used for concentric circle arrangement, and no dead angle is ensured for positioning and displaying.
The mobile device 43 and the control system 10 are connected by using a communication protocol, the security check client sends a request signal, the control system 10 transmits the changed information in the database to the security check client for many times, and the communication relationship continues until the security check client sends a termination signal. In this embodiment, a communication protocol such as Websocket, Long poll or Ajax may be adopted between the mobile device 43 and the control system 10, and the database may be of Mysql, Oracle, SQLserver, MomgoDB or DB2 type; the Websocket communication protocol is preferably adopted between the mobile device 43 and the control system 10, and the database is preferably a Mysql database to occupy less system resources.
When the database of the control system 10 does not obtain the positioning information of the electronic tag 31 with a certain number for a long time (5-10 minutes), the electronic tag is judged to be damaged or lost, the control system 10 is triggered to send out an alarm notification to search the image information of the electronic tag on the surface of the target object, and then the target object is quickly found and is immediately intercepted and checked; when the information that the electronic tag 31 with a certain number is located at the same position for a long time (10-20min) is monitored, that is, the electronic tag 31 is determined to be resident in a specific area for a long time, the control system 10 is also triggered to send out an alarm signal, and then the electronic tag is quickly located and searched and is immediately intercepted and checked.
Confirming the non-target object which does not need to be marked after passing through the X-ray machine 21, and immediately stopping monitoring; and (4) determining whether the marked article is intercepted at the outlet again, entering an unpacking inspection area if the marked article is intercepted, and releasing and stopping monitoring if the marked article is not intercepted.
After the target object passes through the X-ray machine 21, the target object is conveyed to a pickup position of the conveyor, the positioning sensing device 41 arranged at the position senses the electronic tag 31 marked on the target object and transmits information to the control system 10, and meanwhile, when the target object leaves the conveyor, the positioning plate at the position triggers the image acquisition device at the position to acquire the image information of the carrier for picking up the target object. The control system 10 screens the acquired image information, selects the image of the object carrier to take away the object and transmits the image to the mobile device. The monitoring system 40 monitors the movement of the target object in the area to be inspected in real time, and timely discovers suspicious behaviors of the target object and informs the control system 10 of the suspicious behaviors, because the area to be inspected is covered by the positioning sensing devices 41 arranged in a mesh manner, the positioning sensing devices 41 in the sub-area where the target object is located transmit sensed information to the control system 10, the control system 10 transmits the number of the sub-area and the corresponding information of the electronic tag of the target object to the mobile device, and a user of the mobile device 43 can quickly position the target object and inspect the target object. The inspection command from the control system 10 may be issued at any time before passing through the exit location, and the target item marked by the tag that sent the alarm signal is intercepted and inspected by identifying the carrier.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides an electronic tracking system of target article, its includes control system, is used for on conveyer to advance scanning system, mark system that article discerned and be used for waiting to examine the monitored control system who examines the district to carry out the location to target article, wherein control system and scanning system, mark system and monitored control system all communication connection, scanning system has the X-ray machine, and monitored control system includes location induction system, distributes image acquisition device and mobile device in the monitored control district, mark system has electronic tags and attaches the marking mechanism on target article with electronic tags is automatic, its characterized in that: the scanning system is also provided with a sensing door which is arranged in front of the X-ray machine along the conveying direction of the object, the sensing door is provided with a laser range finder and a camera unit which collects image information of a target object and an attaching action, the area to be detected of the electronic tracking system is divided into subareas which are in grid distribution and have different numbers, at least one positioning induction device is correspondingly arranged in each subarea, the number of each subarea is associated with the positioning induction device corresponding to the subarea in a database of the control system, the electronic tracking system is provided with two positioning induction devices with different sensitivities at the outlet of the area to be detected of the electronic tracking system to form concentric circle monitoring, the marking mechanism comprises a mechanical arm with six degrees of freedom, the electronic tag is communicated with the control system and the monitoring system, and has a unique identification code, each electronic tag is provided with a magnetic control switch and a photosensitive sensor for realizing anti-disassembly alarm, the magnetic control switch can enable the electronic tag to be activated to enter a working mode under the trigger of a marking mechanism, a plurality of positioning plates for acquiring the position information of a target object are arranged on the conveying device at intervals, and the electronic tag triggers the image acquisition device to acquire image information when the target object attached to the electronic tag leaves the conveying device.
2. The electronic tracking system of a target item of claim 1, wherein: the sensing door is provided with a communication interface connected with the control system, the laser range finder is used for collecting three-dimensional characteristic information of a target object, and the distance between the X-ray machine and the sensing door along the object conveying direction ranges from 1 meter to 10 meters.
3. The electronic tracking system of a target item of claim 2, wherein: the distance between the sensing door and the mechanical arm in the conveying direction of the article ranges from 0.5 meter to 6 meters.
4. The electronic tracking system of a target item of claim 3, wherein: the marking mechanism is also provided with a displacement sensor and a proximity sensor for sensing the displacement of the mechanical arm.
5. A method of electronic tracking of a target item, comprising the steps of:
the X-ray machine scans the object to be detected running on the conveying device to determine whether the object to be detected belongs to the target object;
if the target object does not belong to the target object, releasing;
if the electronic tags belong to the target object, the control system gives a corresponding instruction when the target object passes through the sensing door, the laser range finder arranged on the sensing door obtains the three-dimensional characteristics of the target object, the control system gives a marking instruction, the marking mechanism gives a marking action at a preset time and a preset position given by the control system so as to automatically attach the electronic tags to the target object, the marking mechanism comprises a mechanical arm with six degrees of freedom, the electronic tags are communicated and connected with the control system and the monitoring system, each electronic tag is provided with a unique identification code, each electronic tag is provided with a magnetic control switch and a photosensitive sensor for realizing anti-disassembly alarm, the magnetic control switch can enable the electronic tag to be activated to enter a working mode under the trigger of the marking mechanism, and the conveying device is provided with a plurality of positioning plates at intervals for obtaining the position information of the target object, the electronic tag triggers the image acquisition device to acquire image information when a target object attached to the electronic tag leaves the conveying device, meanwhile, a camera unit arranged on the sensing door acquires images of the target object and the marking action, the monitoring system monitors the movement of the target object in the area to be detected in real time, and suspicious behaviors of the target object are discovered and notified to the control system;
the real-time monitoring of the activity of the target object in the area to be detected by the monitoring system specifically comprises the following steps:
dividing the area to be detected into a plurality of sub-areas which are arranged in a grid shape, numbering each sub-area, arranging positioning induction devices which are arranged corresponding to the sub-areas in the area to be detected, arranging at least one positioning induction device in each sub-area, and associating the numbering of each sub-area with the positioning induction device corresponding to the sub-area in a database of a control system; the electronic tracking system is provided with two positioning induction devices with different sensitivities at an outlet of a region to be detected of the electronic tracking system so as to form concentric circle-shaped monitoring.
6. The method for electronic tracking of a target item of claim 5, wherein: the positioning sensing device transmits sensed electronic tag information to the control system, the control system transmits the electronic tag information and the position information of the target object to the mobile equipment, the electronic tag triggers an alarm signal when being manually removed, staying in the same sub-area for a long time or being disconnected, so that the control system sends an instant checking instruction, and the control system sends a checking instruction to the marked target object before the target object passes through the outlet position.
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| CN201610930041.XA CN106403842B (en) | 2016-10-31 | 2016-10-31 | Electronic tracking system and method for target object |
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| CN201610930041.XA CN106403842B (en) | 2016-10-31 | 2016-10-31 | Electronic tracking system and method for target object |
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| CN113364970B (en) * | 2020-03-06 | 2023-05-19 | 华为技术有限公司 | Imaging method of non-line-of-sight object and electronic equipment |
| CN113255435A (en) * | 2021-04-09 | 2021-08-13 | 浙江大华技术股份有限公司 | Article monitoring method and device, computer equipment and storage medium |
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