CN109120899A - A kind of Camera Tracking System and method based on ultrasonic signal - Google Patents
A kind of Camera Tracking System and method based on ultrasonic signal Download PDFInfo
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- CN109120899A CN109120899A CN201811019081.4A CN201811019081A CN109120899A CN 109120899 A CN109120899 A CN 109120899A CN 201811019081 A CN201811019081 A CN 201811019081A CN 109120899 A CN109120899 A CN 109120899A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- 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
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/029—Location-based management or tracking services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
Abstract
The present invention provides a kind of Camera Tracking System and method based on ultrasonic signal, belongs to field of traffic control.The Camera Tracking System based on ultrasonic signal includes active ultrasonic wave launcher on the mark rod being arranged in test site, the ultrasonic receiver being arranged on the outside of examination vehicle, the onboard system being arranged on examination vehicle, database server, apps server and the video monitoring server that control centre is arranged in, and the camera pan-tilt being arranged in test site；Each ultrasonic receiver has unique hardware address, and the hardware address of the ultrasonic receiver and the subject of test site correspond；The latitude and longitude information of the satellite positioning for vehicle traveling of taking an examination is sent back control centre by the onboard system, preset point point number is retrieved in tables of data by the database server of control centre, video monitoring server is sent this data to, the instruction at control point will be called to be sent to preset camera pan-tilt by video monitoring server.
Description
Technical field
The invention belongs to field of traffic control, and in particular to a kind of Camera Tracking System and side based on ultrasonic signal
Method.
Background technique
The examination of vehicle driver subject two is commonly called as place driving path, and driver need to complete the Ministry of Public Security in test site
" 123 " several subject sides that command requires are to pass the examination.Rank difference is driven according to the vehicle driver standard that driver claims,
The subject of completion is also different, and driving rank such as standard is C1, then needs to complete that " reversing storage ", " positioning of slope road stops in test site
Vehicle and starting ", " lateral parking ", " right-angled bend " four subjects.With the continuous improvement of people's living standards, carrying out motor-driven
The student of vehicle driver examination also increases year by year, and the difficulty of examination supervision is also increasing.It is to prevent student from replacing in examination hall
It examines, the behaviors such as normal place malpractices is set, have continually introduced such as fingerprint individual verification, examination process pan-shot in examination hall
Means.But these means still have some shortcomings, and the student much to leave things to chance still finds the loophole of some test sites, examine for it
It practices fraud during examination and convenience is provided.
Realize that examination system used in the area of place driving path electronization examination requires car in present China
Vehicle-mounted computer configuration video monitoring and video file upload function.Panoramic shooting is set in test site at the same time
The testing situations of all vehicles in machine, shooting and record test site, and it is uploaded to the function of supervision center.These means are very
Solve the problems, such as that examination is interior in big degree and vehicle outside take an examination monitoring, but examining for a certain examination student or a certain vehicle
Trying all-the-way tracking, there are still some shortcomings.Driver's face and identity are only monitored as interior video monitoring image, it is outdoor
Panoramic camera observation is all vehicles and all subjects, and there are still very big deficiencies for level of detail, even if there is holder can be into
Row remote control, but focal position and place dead angle can still result in the unintelligible or leaky of video capture.
Other one layer of meaning of examination video monitoring is by video to supervise, and the False Rate in examination hall is reduced.
So-called erroneous judgement refers to that the test site under the conditions of causing not have examination since place signal is disturbed exists to vehicle driver
The judgement of mistake is produced in examination process, so as to cause its mistake by deduction score or the case where score should be deducted but
Not by deduction corresponding scores.This is likely to occur in any electronic examination process, believes for example, by using switching value
Number be judgment basis test site, erroneous judgement the reason of often have the sensors such as the photoelectricity being arranged in the venue, Hall by
The influence of weather or human factor, as snowflake, fallen leaves, motor-vehicle tail-gas to the interference of photosignal for another example strong wind to hall sensing
Device Deccan is disturbed.A new generation electronic test site use differential GPS as signal judging basis, but also will receive cloud layer,
The influence of the factors such as GPS drift.Erroneous judgement, which has occurred, will generate dispute, then can be to accidentally by video monitoring and human intervention
Sentence and take measures to be corrected, while being also the information source for carrying out error correction and adjustment to examination equipment.And the monitoring of this respect
The either interior camera shooting of the panoramic shooting of test site or examination is all difficult to meet as judgment basis.
Summary of the invention
It is an object of the invention to solving above-mentioned problem existing in the prior art, provide a kind of based on ultrasonic signal
Camera Tracking System and method.
The present invention is achieved by the following technical solutions:
A kind of Camera Tracking System based on ultrasonic signal, it is active on the mark rod in test site including being arranged in
Ultrasonic transmitter, the ultrasonic receiver being arranged on the outside of examination vehicle, the onboard system being arranged on examination vehicle, setting are being controlled
Database server, apps server and the video monitoring server at center processed, and taking the photograph in test site is set
Camera holder；
Each ultrasonic receiver has unique hardware address, the hardware address of the ultrasonic receiver and examination
The subject in place corresponds；
The latitude and longitude information of the satellite positioning for vehicle traveling of taking an examination is sent back control centre by the onboard system, by control
The database server of the heart retrieves preset point point number in tables of data, sends this data to video monitoring server, by regarding
Frequency monitoring server will call the instruction at control point to be sent to preset camera pan-tilt, control the camera shooting on the camera pan-tilt
Machine is tracked.
Vehicle is taken an examination when entering subject, ultrasonic receiver thereon is read on the mark rod being arranged in test subject
The signal that active ultrasonic wave launcher issues, starts to identify the test subject.
It include following information in the tables of data: examination information of trainee, examination vehicle information, test subject place information, pre-
Set dot position information, satellite positioning range information, tester, vehicle, subject, preset point, satellite positioning range contacts list.
It is attached, is used using 485 buses between the camera pan-tilt and the video monitoring server of control centre
Serial ports of computers is exported, and passive RS 232-485 interface equipment is used if command range is in 200 meters of distance ranges,
Active RS232-485 interface equipment is used if 200 meters or more if distance；Output data format is 1 start bit, 8 digits
According to position, no parity check position, baud rate 2400B/S.
The camera pan-tilt is using the platform that can support PELCO-P agreement.
The camera tracking method realized using the Camera Tracking System based on ultrasonic signal is as follows:
S1 determines test subject initial position trigger signal；
S2 determines that video camera shoots the best camera position of each test subject, and angle is pre- as holder using these information
A storage is set, is waited to be called；
The place of S3, the examination vehicle that examinee is selected, test subject and selection forms exam information base table, waits and pre-
Set an information association；
S4, the test subject selected according to examination hall and place establish examinee, examine vehicle, choose subject and place, preset point connection
Close information；
S5 calls preset point when receiving ultrasonic signal, forms image taking；
S6 judges whether there is preset point in subject, if it is, S7 is transferred to, if it is not, then being transferred to S8；
S7 is triggered according to signal in subject, calls preset point；
S8, Course Examination terminate, and wait and enter next subject；
S9, judges whether all subjects have all taken an examination, if it is, S10 is transferred to, if it is not, then returning to S5；
S10, calls a preset point of dispatching a car, and video camera steering examines test ground and drives position of dispatching a car.
Compared with prior art, the beneficial effects of the present invention are: the examination section that the present invention is travelled according to vehicle driver
Mesh in conjunction with examination Design of Signal in place and realizes a kind of outdoor capture and image trace device with PTZ camera,
Can effectively to a certain vehicle or a certain student in examination process car body movement shoot.It is advantageous that can be directed to
The examination overall process of a certain examination vehicle or driver are shot, and examination process can be linked up with and return with the exam information of student
Shelves.
Detailed description of the invention
The step block diagram of Fig. 1 the method for the present invention
The database information structure chart of Fig. 2 present system
The control structure figure of Fig. 3 present system.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing:
The solution of the present invention is specific as follows:
The first, the positioning of shooting scene
The test site of place driving path is made of several test subjects, these test subjects are according to certain route quilt
It organizes together, there is road in examination hall to be attached between two different subjects, ultimately form a loop.I.e. examinee is from out
Hair point, which sets out to start to take an examination, is returning to starting point by all subject rear vehicles.Vehicle is when entering each test subject
Section's purpose initial signal will be triggered.Initial signal of the present invention uses ultrasonic signal: vehicle is when entering subject by setting
The ultrasonic receiver set on examination vehicle reads the ultrasonic receiver signal being arranged in test subject, examines to identify this
Examination subject starts.So that the signal pickup assembly being also mounted on car body that ground on the scene is either arranged is determined
Processing.From the angle of supervision, test start signal designates the position where examination vehicle, error before and after this position
Usual situation is no more than 20CM, and ultrasonic signal is used to be less than 20CM as the error of initial signal, also is needed to track in this way
Video camera provide a degree of location information.When a certain vehicle triggers test subject commencing signal, can will image
Machine camera lens is accurately positioned at the test subject region.
The second, it is associated with examinee and examination vehicle information
In order to realize camera for the camera shooting tracking of certain examination vehicle and certain examination student, it is necessary to obtain certain student first
The subject and place information of examination.In a comprehensive place driving path examination hall, often there are multiple identical subjects, with
The examination vehicle reequiped in advance matches.For example " side parking " subject is test time longest subject, then accordingly at one
Multiple side parking stalls are set in examination hall, and right-angled bend is examination used time shortest subject, then the place of the test subject is with regard to phase
To less.If examination vehicle is relatively more, considers the number appropriate for increasing certain subject examination hall, can guarantee examination in this way
The case where smoothness prevents most student's parkings on examination road, waits test subject.
Control centre can be according to the test subject place built well, equilibrium assignment examination student's test site, examination
Vehicle can also randomly choose same section's purpose difference test site according to jam situation, this is all to allow in examination process
's.So, realize that the tracking of certain student examination must just obtain test subject examination hall and student and the corresponding information of vehicle three.
Examination student's vehicle and the integrated information of test subject place allocation table three are as shown in table 1:
| Serial number | Student | Test subject place | Examine number plate |
| 1 | First | Stop A for side | 001 |
| 2 | First | Right-angled bend B | 001 |
| 3 | Second | Stop B for side | 002 |
| … | … | … | … |
Table 1
By database manipulation, the exam information of all place driving paths of a certain student can be screened, as
Carry out the location information source of a certain student's video tracking.
Third, whole section purpose video location
Camera pan-tilt used in the present invention is general holder, and the platform of PELCO-P agreement can be supported to be ok.
PELCO-P agreement is general holder control protocol, is widely used in camera pan-tilt control.The control word of the agreement such as table
Shown in 2:
| Byte 1 | Byte 2 | Byte 3 | Byte 4 | Byte 5 | Byte 6 | Byte 7 |
| Sync byte | Address code | Instruction code 1 | Instruction code 2 | Numeric data code 1 | Numeric data code 2 | Check code |
Table 2
The protocol data format is 1 start bit, 8 data bit, no parity check position, baud rate 2400B/S.
The instruction code and numeric data code specification of the agreement are illustrated in puppy parc concentration, are not being repeated herein.The association
View supports 1-64 preset point of setting.So-called preset point, i.e., preservation camera position information, when to holder send call instruction
When, video camera turns to preset point and is shot.The setting and call instruction of 1-32 preset point are as shown in Table 3 and Table 4:
| Byte 1 | Byte 2 | Byte 3 | Byte 4 | Byte 5 | Byte 6 | Byte 7 |
| Sync byte | Address code | 00H | 03H | 00H | Preset point number | Check code |
Table 3
| Byte 1 | Byte 2 | Byte 3 | Byte 4 | Byte 5 | Byte 6 | Byte 7 |
| Sync byte | Address code | 00H | 07H | 00H | Preset point number | Check code |
Table 4
The setting of 33-64 preset point and calling control word are as shown in the following table 5 and table 6:
| Byte 1 | Byte 2 | Byte 3 | Byte 4 | Byte 5 | Byte 6 | Byte 7 |
| Sync byte | Address code | 02H | FFH | Preset point number | 01H | Check code |
Table 5
| Byte 1 | Byte 2 | Byte 3 | Byte 4 | Byte 5 | Byte 6 | Byte 7 |
| Sync byte | Address code | 02H | FFH | Preset point number | 00H | Check code |
Table 6
In conclusion being first adjusted to video camera on the camera site of a certain subject starting, then the position is defined
For a preset point, and by the preset point and test subject information association.It is then generated such as when there is student's selection to drive into the subject
Information shown in the following table 7.
| Serial number | Student | Test subject place | Preset point | Examine number plate |
| 1 | First | Stop A for side | 01H | 001 |
| 2 | First | Right-angled bend B | 02H | 001 |
| 3 | Second | Stop B for side | 03H | 002 |
| … | … | … | … | … |
Table 7
When the student that takes an examination enters some subject, the signal that certain test subject starts examination is triggered.The signal is with student
With examination vehicle and test subject as search condition, a preset point will be uniquely positioned, obtains the point number of the preset point, then
The order for calling preset point is sent to video camera, then the shooting for entering certain test subject to examination vehicle can be achieved.
4th, in subject image track up
Under normal circumstances if the running distance of test subject is shorter, and section's purpose feelings can be completely covered in video camera
Under condition, it may be considered that the track up of subject starting is only set.It thus can recorde the driving conditions in subject.If section
Mesh running distance is longer, such as " hundred meters of plus-minus shelves ", " speed limit width-limited door " subject (truck examination needs to examine).Then it is contemplated that
Preset point is added on vehicle distance interval of being expert at remote position, while according to the setting video camera revolving speed of subject speed.For pre-
The triggering for setting calling a little is still related with the means of electronization examination, if using differential satellite positioning method, it can be with vehicle
Satellite positioning signal trigger signal as preset point location triggered of the traveling in subject.If using output switch parameter
Determine the triggering that signal is called as preset point, then can choose the farther away on-off model of distance in subject as triggering preset point
Signal.In this way, video image of the vehicle in subject can be traced into.
Present system is specific as follows:
Subject starting point uses short distance ultrasonic receiver technology.It is arranged on entering section's purpose mark rod active
Ultrasonic transmitter, each ultrasonic transmitter have oneself unique hardware address.Ultrasonic distance is received in 5 to 8 meters of models
It encloses.Ultrasonic receiver setting is connected on the outside of examination vehicle with vehicle-mounted examination system.When examination vehicle drives into certain test subject
Afterwards, ultrasonic receiver can receive the hardware address of ultrasonic receiver transmission, indicate that certain student has driven certain examination vehicle
Enter test subject.Since the subject of ultrasonic receiver hardware address and test site corresponds, so determining one
Section's purpose preset point only needs that preset point information can be obtained by the retrieval of a database for data retrieval.
Need to establish the connection of following information in database side, as shown in Fig. 2, 21 expression examination information of trainee in Fig. 2,22
Indicate examination vehicle information, 23 indicate test subject place information, and 24 indicate preset dot position information, and 25 indicate satellite positioning range
Information, 26 indicate tester, vehicle, subject, preset point, satellite positioning range contacts list.
The latitude and longitude information of the satellite positioning for vehicle traveling of taking an examination need to only be sent back control centre by examination onboard system, by controlling
The data service end at center processed retrieves preset point point number in Fig. 2 in tables of data shown in 26, be subsequently sent to prefabricated camera shooting
Machine head.
It is attached between holder and control centre's video control machine using 485 buses, serial ports of computers can be used to carry out
Output, command range in 200 meters of distance ranges can be used passive RS 232-485 interface equipment, distance 200 meters above for
Guarantee that active RS232-485 interface equipment can be used in the reliability of data transmission.Output data format is 1 start bit, 8 digits
According to position, no parity check position, baud rate 2400B/S.The control process entirely controlled is as shown in Figure 3.
31 indicate onboard system in Fig. 3, and 32 indicate control centre's apps server, and 3 indicate video monitoring server,
34 indicate camera pan-tilt, and 35 indicate database server.
Car-mounted computer (onboard system 31 includes car-mounted computer, in addition to this further includes two Vehicular satellite locators,
Antenna, powered ups power supply etc.) to control centre's apps server 32, application program takes transmission satellite positioning precise information
The data of business 32 combined data library 35 of device retrieval, determine preset point point number, send this data to video monitoring server 33, by
Video monitoring server 33 will call the instruction at control point to be sent to prefabricated tracking camera by 485 buses.
Implementation steps process of the invention is illustrated in fig. 1 shown below, comprising:
S1 determines test subject initial position trigger signal；
S2 determines that video camera shoots the best camera position of each test subject, and angle is pre- as holder using these information
A storage is set, is waited to be called；
The place of S3, the examination vehicle that examinee is selected, test subject and selection forms exam information base table, waits and pre-
Set an information association；
S4, the test subject selected according to examination hall and place establish examinee, examine vehicle, choose subject and place, preset point connection
Close information；
S5 calls preset point, forms image taking when vehicle of taking an examination triggers subject commencing signal；
S6 judges whether there is preset point in subject, if it is, S7 is transferred to, if it is not, then being transferred to S8；
S7 is triggered according to signal in subject, calls preset point；
S8, Course Examination terminate, and wait and enter next subject；
S9, judges whether all subjects have all taken an examination, if it is, S10 is transferred to, if it is not, then returning to S5；
S10, calls a preset point of dispatching a car, and video camera steering examines test ground and drives position of dispatching a car.
With video identification and being constantly progressive for tracking technique is imaged, market has had and can carry out panorama tracking to certain vehicle
With the camera system of autozoom, but the single cost of this kind of system is all at ten thousand yuan or more, and if being directed to same vehicle
Realize that smooth tracking also needs to carry out continuous machine learning.The present invention utilizes existing equipment and general letter in test site
Single cradle head controllor realizes that a kind of vehicle tracking for place driving path is shot, and provides one kind for place driving path
New regulatory measure
Above-mentioned technical proposal is one embodiment of the present invention, for those skilled in the art, at this
On the basis of disclosure of the invention application method and principle, it is easy to make various types of improvement or deformation, be not limited solely to this
Invent method described in above-mentioned specific embodiment, therefore previously described mode is only preferred, and and do not have limitation
The meaning of property.
Claims (6)
1. a kind of Camera Tracking System based on ultrasonic signal, it is characterised in that: it is described based on the camera shooting of ultrasonic signal with
The ultrasound that track system includes active ultrasonic wave launcher on the mark rod being arranged in test site, is arranged on the outside of examination vehicle
Wave receiver, the onboard system being arranged on examination vehicle, the database server that control centre is set, apps server
And video monitoring server, and the camera pan-tilt being arranged in test site；
Each ultrasonic receiver has unique hardware address, the hardware address and test site of the ultrasonic receiver
Subject correspond；
The latitude and longitude information of the satellite positioning for vehicle traveling of taking an examination is sent back control centre by the onboard system, by control centre
Database server retrieves preset point point number in tables of data, sends this data to video monitoring server, is supervised by video
Control server will call the instruction at control point to be sent to preset camera pan-tilt, control video camera on the camera pan-tilt into
Line trace.
2. the Camera Tracking System according to claim 1 based on ultrasonic signal, it is characterised in that: examination vehicle is entering
When subject, ultrasonic receiver thereon reads the sending of the active ultrasonic wave launcher on the mark rod being arranged in test subject
Signal, start to identify the test subject.
3. the Camera Tracking System according to claim 2 based on ultrasonic signal, it is characterised in that: in the tables of data
Including following information: examination information of trainee, examination vehicle information, test subject place information, preset dot position information, satellite positioning
Range information, tester, vehicle, subject, preset point, satellite positioning range contacts list.
4. the Camera Tracking System according to claim 3 based on ultrasonic signal, it is characterised in that: the video camera cloud
It is attached, is exported using serial ports of computers, such as using 485 buses between platform and the video monitoring server of control centre
Fruit command range then uses passive RS 232-485 interface equipment in 200 meters of distance ranges, if distance if 200 meters or more
Use active RS232-485 interface equipment；Output data format is 1 start bit, 8 data bit, no parity check position, baud rate
2400B/S。
5. 4 any Camera Tracking Systems based on ultrasonic signal according to claim 1, it is characterised in that: described
Camera pan-tilt is using the platform that can support PELCO-P agreement.
6. the camera tracking method realized using any Camera Tracking System based on ultrasonic signal of 1-5, spy are:
The described method includes:
S1 determines test subject initial position trigger signal；
S2 determines that video camera shoots the best camera position of each test subject, angle, using these information as holder preset point
Storage, is waited to be called；
The place of S3, the examination vehicle that examinee is selected, test subject and selection forms exam information base table, waiting and preset point
Information association；
S4, the test subject selected according to examination hall and place establish examinee, examine vehicle, choose subject and place, preset point joint letter
Breath；
S5 calls preset point when receiving ultrasonic signal, forms image taking；
S6 judges whether there is preset point in subject, if it is, S7 is transferred to, if it is not, then being transferred to S8；
S7 is triggered according to signal in subject, calls preset point；
S8, Course Examination terminate, and wait and enter next subject；
S9, judges whether all subjects have all taken an examination, if it is, S10 is transferred to, if it is not, then returning to S5；
S10, calls a preset point of dispatching a car, and video camera steering examines test ground and drives position of dispatching a car.
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| CN201811019081.4A CN109120899A (en) | 2018-09-03 | 2018-09-03 | A kind of Camera Tracking System and method based on ultrasonic signal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811019081.4A CN109120899A (en) | 2018-09-03 | 2018-09-03 | A kind of Camera Tracking System and method based on ultrasonic signal |
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| US20160140404A1 (en) * | 2006-08-11 | 2016-05-19 | Michael Rosen | Method and apparatus for automatically detecting use of a mobile phone |
| CN103065520A (en) * | 2012-12-28 | 2013-04-24 | 苏州苏迪智能系统有限公司 | Detection system for backing car into storage and detection method thereof |
| CN106034224A (en) * | 2015-03-20 | 2016-10-19 | 柳州桂通科技股份有限公司 | Driving test information collecting and storing system |
| CN105245860A (en) * | 2015-11-18 | 2016-01-13 | 天津工业大学 | Camera tracking system and method based on RFID signal |
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Application publication date: 20190101 |