CN101770658A - Data acquisition processing system - Google Patents
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- CN101770658A CN101770658A CN200810204909A CN200810204909A CN101770658A CN 101770658 A CN101770658 A CN 101770658A CN 200810204909 A CN200810204909 A CN 200810204909A CN 200810204909 A CN200810204909 A CN 200810204909A CN 101770658 A CN101770658 A CN 101770658A
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Abstract
The invention relates to a data acquisition processing system which includes a data acquisition device, an operation control device, a LED light source control device and a communication interface; the data acquisition device, the LED light source control device and the communication interface are all connected with the operation control device. Compared with prior art, the invention improves the statistical accuracy of the number of passengers to more than 95% in complex passenger flow and boarding and alighting behavior mode, and basically solves the real-time and accurate statistical problem of bus passengers.
Description
Technical field
The present invention relates to automatic passenger's number system, particularly relate to a kind of data acquisition processing system.
Background technology
In order to control the volume of the flow of passengers, and optimize the urban transit bus scheduling, realize the science scheduling of daily operation, public transportation system need obtain real-time passenger flow statistics information.
Be installed in the demographics instrument on the motorbus in the past, or adopt the mechanical pedal technology of photoelectric technology, and can count on number more roughly, accuracy rate is between 60～70%.
Or the subject matter of the mechanical pedal technology of photoelectric technology is: or the mechanical pedal technology of photoelectric technology can only obtain binary switch information, and the pattern of the behavior pattern of passenger getting on/off and passenger flow is very complicated, can not satisfy simple signal triggering or block the condition of carrying out technology.
Or adopt passenger's counting instrument of the mechanical pedal technology of photoelectric technology, only sparse and passenger's queuing is got on or off the bus just working properlyly under the condition in passenger flow, and this does not obviously satisfy the relatively more chaotic developing countries of public transport order such as picture China.
And utilize video image to handle and mode identification method, and solve guest's arrival of some some occasions and the flow of the people that leaves, some actual experimental systems have been arranged, such as the market passenger flow statistics.This technology can not be applied on the motorbus, and reason is very simple, the passenger flow statistical system in market, and the video camera setting height(from bottom) surpasses more than 3.5 meters, and the human body target in the image of gateway, market is little target.And the video camera setting height(from bottom) on the motorbus is about 2 meters, and the human body target in the car door image is a general objective, and height can be stood image area more than 80% than higher head of passenger image.
According to the difference of technical implementation way, APC (APC: the abbreviation of English Automatic Passenger Counter, promptly automatic passenger's calculating instrument) system roughly can be divided into following several types.
1. " physics contact APC " or measuring vehicle weight mode." physics contact APC " refers to that foot pedal pad, switch matrix, Multi-function cushion etc. need the physics contact, and is embedded with a kind of mode that switch is added up the passenger therein.Pressure plare bus passenger flow counting instrument is installed on the forward and backward door pedal of vehicle, and triggering pressure transducer during passenger getting on/off will be automatically recorded.This kind equipment has higher accuracy rate at the use initial stage, but because it has the characteristic of physics contact, and fatigue resistence is poor, system unit is fragile, causes its counting to be tending towards inaccurate.In addition, because the position that equipment is installed is most important for accurate counting, so the Installation and Debugging expense is also higher.
The measuring vehicle weight mode is to measure a kind of mode of patronage by the variation of measuring vehicle weight.
2. the automatic passenger of infrared type counts
(1) the automatic passenger's counting of passive infrared formula: the automatic passenger's counting technology of passive infrared formula is owing to adopt suitable pyroelectric infrared probe can only detect the signal that human body sends, and this has just been avoided the interference of other object.When bus up and down during the passenger, infrared sensor is surveyed the process that variation that the human body infrared spectrum caused promptly obtains passenger getting on/off, can differentiate the get on or off the bus direction and the number of getting on or off the bus by signal Processing.Though human body temperature is relatively stable, the detectable signal of infrared sensor can be subjected to the influence of passenger's dressing.The inherent defect of this technology is if environment temperature and human body temperature are when being close, sensor just can not effectively detect passenger getting on/off process, different regions, the difference of environment temperature, humidity, to the difference of infrared ray absorbing rate, influence the installation of system easily in different regions.In addition, it changes fast to environment temperature and strong exposure irradiation is also relatively more responsive.
(2) the automatic passenger's counting of active infrared formula: active infrared formula number system is installed near the specific height of bus front and back door, infrared ray by emission customization wavelength covers certain zone, and the light that reflects from the passenger by sensor, thereby discern passenger getting on/off direction and number automatically on one's body.Because adopt self light source, it is not subject to the influence of ambient temperature, light status, can reach higher precision, is the more satisfactory counting technology of bus passenger flow information acquisition.Comparative maturity all is the infrared passenger flow counting device of active multi beam on the foreign market.What external Canadian INFODEV company, German DILAX company adopted all is this mode of operation, and price is very expensive.
Because sensor is installed in bus door, depend on human body cutting infrared ray and judge direction, China's actual conditions formula bus passenger environment for crowded state, this system accuracy rate when the peak can decline to a great extent, if rely on the catoptrical sensitivity of memory same human body identical, the whole system algorithm complex is strengthened greatly, also may have a strong impact on system along with sensor is aging and use.This is that domestic infrared system is far failed the main cause in external like product on performance.
(3) the automatic passenger's counting of infrared type compound system: because the inherent defect of the automatic passenger's counting of passive infrared formula can adopt the active infra-red counter to constitute the error of compound system with compensation passive infrared formula counting simultaneously.But system cost can increase, and because two kinds of sensors are excited simultaneously, can produce the problem of repeat count.
4. based on the bus passenger flow number system of Flame Image Process: video camera is installed in car door is obtained video image, consecutive image is carried out analyzing and processing through software, identification passenger and motion thereof, thus automatically number of getting on or off the bus and direction are counted.The counting precision of this technology depends on the design level of image analysis software to a great extent.System is subject to vibrate, the influence of light, the good bad influence software analysis result's of picture quality precision.
The complicated difficulty of this technology is the highest, relates to multiple subject, as optics, graphical analysis, computer system, artificial intelligence learning art.
Summary of the invention
Technical matters to be solved by this invention is exactly to provide a kind of data acquisition processing system for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions: a kind of data acquisition processing system, it is characterized in that, comprise data collector, operation control device, led light source control device and communication interface, described data collector, led light source control device and communication interface all are connected with operation control device.
Described data collector comprises LED light filling light source, camera lens, industrial camera, car door sensor.
Described operation control device comprises image decoder, signal processor, image encoder, door contact interrupter detection module and communication interface module, described image decoder, image encoder, door contact interrupter detection module and communication interface module all are connected with signal processor, and described communication interface module comprises network communication interface unit, serial communication interface unit.
Described led light source control device comprises sync separator, arithmetic processor, LED power control switch and the LED communication interface that is used for the receiver, video input signal, and described sync separator, LED power control switch and LED communication interface all are connected with arithmetic processor.
Described communication interface comprises RS232 communication interface and RS485 communication interface, and this RS485 communication interface is connected with industrial camera, and described LED communication interface is RS485 communication interface or MAX485 communication interface.
Described camera lens, industrial camera all are connected with the image decoder of operation control device by video transmission line, and described car door sensor is connected with the door contact interrupter detection module.
Described data collector also comprises monitor, and this monitor is connected with the image encoder of operation control device.
Described communication interface also comprises Ethernet interface, and this Ethernet interface is connected with the network communication interface unit of operation control device.
Described image decoder is TVP5150, described signal processor is TMS320DM642, described image encoder is SAA7104, described door contact interrupter detection module is TL521-4, described network communication interface unit is LXT971, described serial communication interface unit is TL16C752, and described sync separator is LM1881M, and described arithmetic processor is AT89S52.
Compared with prior art, the present invention brings up to the patronage statistical precision more than 95% under the passenger flow pattern and the behavior pattern of getting on or off the bus of complexity, has solved the difficult problem that bus passenger number is accurately added up in real time substantially.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of operation control device of the present invention;
Fig. 3 is the structural representation of led light source control device of the present invention;
Fig. 4 is video camera of the present invention and LED light filling light source installation requirement synoptic diagram;
Fig. 5 for the present invention when bus is used photographic images require synoptic diagram one;
Fig. 6 requires synoptic diagram two for the present invention's photographic images when bus is used;
Fig. 7 is a number counting process synoptic diagram of the present invention;
Fig. 8 is a camera control process synoptic diagram of the present invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Shown in Fig. 1-8, a kind of data acquisition processing system, comprise data collector 1, operation control device 2, led light source control device 3 and communication interface 4, described data collector 1, led light source control device 2 and communication interface 4 all are connected with operation control device 3.
Described data collector 1 comprises LED light filling light source, camera lens, industrial camera, car door sensor; Described operation control device 2 comprises image decoder 21, signal processor 22, image encoder 23, door contact interrupter detection module 24 and communication interface module, described image decoder 21, image encoder 23, door contact interrupter detection module 23 and communication interface module all are connected with signal processor 22, and described communication interface module comprises network communication interface unit 25, serial communication interface unit 26; Described led light source control device 3 comprises sync separator 31, arithmetic processor 32, LED power control switch 33 and the LED communication interface 34 that is used for the receiver, video input signal, and described sync separator 31, LED power control switch 33 and LED communication interface 34 all are connected with arithmetic processor 32; Described communication interface 4 comprises RS232 communication interface and RS485 communication interface, and this RS485 communication interface is connected with industrial camera, and described LED communication interface is RS485 communication interface or MAX485 communication interface; Described camera lens, industrial camera all are connected with the image decoder 21 of operation control device by video transmission line, and described car door sensor is connected with door contact interrupter detection module 24; Described data collector 1 also comprises monitor, and this monitor is connected with the image encoder 23 of operation control device; Described communication interface 4 also comprises Ethernet interface, and this Ethernet interface is connected with the network communication interface unit 25 of operation control device; Described image decoder is TVP5150, described signal processor is TMS320DM642, described image encoder is SAA7104, described door contact interrupter detection module is TL521-4, described network communication interface unit is LXT971, described serial communication interface unit is TL16C752, and described sync separator is LM1881M, and described arithmetic processor is AT89S52.
The present invention adopts the general objective image-recognizing method, differentiates the behavior pattern of identification passenger getting on/off and the passenger flow pattern of passenger flow up and down, people's logarithmic data that the real-time statistics bus rider is got on or off the bus.Purpose is in order to solve the low problem of bus passenger number statistical precision.
(1) principle of work of motorbus video passenger statistical system
Video camera is taken the video image of car door passenger getting on/off, this video signal is handled by analysis, obtain the passenger getting on/off statistics, these data output to on-vehicle host or car-mounted terminal computing machine by the RS232 communication interface, with wireless communication mode data are sent to Surveillance center by them.
In order to overcome the difficulty that illumination variation causes image recognition, system uses shutter and gain-adjusted control method, calculates the running parameter that video camera needs by the car door image illumination, and sends to video camera by the RS485 communication bus.In case of necessity, not only obtain stay-in-grade image by led light source.
Door contact interrupter detects the on off state that obtains car door, so that the control image processing algorithm, the image that closing of the door is later only is used for the camera control algolithm, abandons demographics algorithm process image, can improve the stability of system like this, and eliminate possible error count.In addition, if led light source is in the state of opening light filling before the closing of the door, then closing of the door is after 3 seconds, and led light source is closed automatically, has guaranteed driving at night safety, and energy savings reduces system power dissipation simultaneously.At the car door place, can only use led light source to provide illumination as passenger getting on/off night.
The video camera that uses in the system of the present invention must have the function by program control shutter speed of the instruction on 485 buses and gain.The light source that the APC system uses is the high-brightness LED white light source, and light filling when being used for the illumination deficiency improves the image quality of image, and then improves the graphical analysis degree of accuracy of system.
When only being used for Installation and Debugging in native system, monitor observes the image of APC output, with the understanding system effect of operate as normal and work whether.
The video image identification product all has the restriction of comparison strictness to the duty of the installation of the installation of video camera and light source and video camera, as the APC of bus passenger number counting instrument, application requirements is arranged equally, referring to Fig. 4, Fig. 5, Fig. 6.
(2) principle of work of motorbus video passenger counting instrument
APC is collection machine vision, image processing and pattern recognition, computer software and hardware, database and network technology, optical image technology, large scale integrated circuit technology and automatic control technology be in the high-tech application system of one, and its major function is that the real-time statistics motorbus is got on the bus passenger's the quantity and the passenger's that gets off quantity at any time and any place as passenger's statistical basis data.
Vehicle-mounted APC counting equipment, form by data collector, Operations Analysis, commercially available image recognition algorithm software, commercially available camera control algolithm software, led light source control device and six main modular of communication interface, finish the collection of passenger basis statistics and the reception of transmission and configuration parameter.The camera of ceiling position is gathered the passenger getting on/off image directly over being installed near the motorbus car door, finish analysis and understanding by the built-in image recognition software in the Operations Analysis to digital picture, export the get on the bus passengers quantity and the passengers quantity of getting off in real time, camera control algolithm software and light source control software are according to analysis and understanding to digital picture, the parameter of output control camera and light source ensures that the image quality of video camera satisfies the requirement of demographics.
A. data collector
Data collector belongs to the fore device of APC, finishes the collection of view data and distinguishing of door contact interrupter state.Data collector comprises seven parts such as light filling light source, camera lens, industrial camera, stabilized voltage supply, dust cover, video transmission line, car door sensor.During insufficient light, the light filling light source is opened automatically in car, increases the camera environment intensity of illumination.Camera lens and industrial camera cooperatively interact and gather view data to be identified.Stabilized voltage supply is power devices such as industrial camera, camera lens, light filling light source and car door sensor.Equipment such as dust cover len, industrial camera and stabilized voltage supply are not damaged by extraneous factors such as dust, foreign material, high low temperature, humidity and vibrations.Video transmission line transfers to the image acquisition compressing card with the output signal of industrial camera.The car door sensor is sent to APC with detected door contact interrupter state at any time, by the operation of APC control industrial camera and image pick-up card images acquired and control algolithm.
B. Operations Analysis
Operations Analysis is the main hardware equipment of APC, comprises image decoder, signal processor, image encoder, four chief components of communication interface.Image decoder is accepted the video-input image signal, finishes by collection and the conversion of analog image to the manageable digital picture of computing machine.Signal processor is its main operational parts of APC, is responsible for operation image identification kernel, camera control algolithm kernel and communications protocol and handles softwares such as kernel.Image encoder is responsible for the processed images data are synthesized vision signal, with the convenient running status of using monitor to observe APC, also makes things convenient for the Installation and Debugging process.Communication interface and monitoring center software cooperatively interact and finish data communication function, receive the required various configuration parameters of APC and send passenger's statistics, and the communication channel of software upgrading is provided.
C. image recognition algorithm software
Image recognition software is the nucleus module of automatic passenger's calculating instrument, is made up of machine vision, Flame Image Process and the algorithm for pattern recognition of complexity.The digital picture of input is exported the passengers quantity result, and is distinguished every passenger's the state of getting on the bus or the state of getting off after the computing of image recognition algorithm software, analysis and understanding continuously.
D. camera control algolithm software
Camera control algolithm software is the necessary module of automatic passenger's calculating instrument, is made up of image processing algorithm and camera control algolithm.Continuously the digital picture of input is through the brightness of image processing algorithm computed image, and brightness data is input in the camera control algolithm handles, and calculates camera shutter parameter, camera gain parameter and light source light filling parameter.Bitcom will be sent to camera and led light source to these three parameters automatically.
The e.LED light source control device
The led light source control device comprises LED power supply, arithmetic processor, LED power control switch and four parts of communication, mainly is to cooperate the camera control algolithm to control the led light source part well.Operation processing unit is taken on by the CPU of the integrated peripheral hardware of this height of single-chip microcomputer usually.Operation bitcom and LED switch Control Software.
F. communication interface
The communication interface of APC must comprise two kinds of communication interfaces of RS232 and RS485, optionally joins ethernet network interface (10M/100M self-adaptation) and other computer systems are carried out the TCP/IP communication.The RS232 interface is the demographics output interface of APC standard, also is the parameter configuration input interface and the software upgrading interface of acquiescence.RS485 is the communication channel of APC control video camera, also is the communication channel of APC control led light source controller.
(3) number counting process
As Fig. 7, people's counting number comprises the calculation process of following step:
1) image information acquisition; 2) image pre-service; 3) motion detection; 4) moving image is cut apart; 5) target classification and feature extraction; 6) multiple mobile object is followed the tracks of; 7) moving object classification judgement; 8) object count of getting on the bus/get off output.
(4) camera control process
As Fig. 8, camera control comprises the calculation process of following step:
1) image information acquisition; 2) image pre-service; 3) brightness of image analysis; 4) control curve calculation; 5) shutter, gain and the output of led light source light filling parameter.
Claims (9)
1. data acquisition processing system, it is characterized in that, comprise data collector, operation control device, led light source control device and communication interface, described data collector, led light source control device and communication interface all are connected with operation control device.
2. a kind of data acquisition processing system according to claim 1 is characterized in that, described data collector comprises LED light filling light source, camera lens, industrial camera, car door sensor.
3. a kind of data acquisition processing system according to claim 2, it is characterized in that, described operation control device comprises image decoder, signal processor, image encoder, door contact interrupter detection module and communication interface module, described image decoder, image encoder, door contact interrupter detection module and communication interface module all are connected with signal processor, and described communication interface module comprises network communication interface unit, serial communication interface unit.
4. a kind of data acquisition processing system according to claim 3, it is characterized in that, described led light source control device comprises sync separator, arithmetic processor, LED power control switch and the LED communication interface that is used for the receiver, video input signal, and described sync separator, LED power control switch and LED communication interface all are connected with arithmetic processor.
5. a kind of data acquisition processing system according to claim 4, it is characterized in that, described communication interface comprises RS232 communication interface and RS485 communication interface, this RS485 communication interface is connected with industrial camera, and described LED communication interface is RS485 communication interface or MAX485 communication interface.
6. a kind of data acquisition processing system according to claim 5, it is characterized in that, described camera lens, industrial camera all are connected with the image decoder of operation control device by video transmission line, and described car door sensor is connected with the door contact interrupter detection module.
7. a kind of data acquisition processing system according to claim 6 is characterized in that described data collector also comprises monitor, and this monitor is connected with the image encoder of operation control device.
8. according to claim 5 or 7 described a kind of data acquisition processing systems, it is characterized in that described communication interface also comprises Ethernet interface, this Ethernet interface is connected with the network communication interface unit of operation control device.
9. a kind of data acquisition processing system according to claim 8, it is characterized in that, described image decoder is TVP5150, described signal processor is TMS320DM642, and described image encoder is SAA7104, and described door contact interrupter detection module is TL521-4, described network communication interface unit is LXT971, described serial communication interface unit is TL16C752, and described sync separator is LM1881M, and described arithmetic processor is AT89S52.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291338A (en) * | 2010-08-20 | 2011-12-21 | 无锡朗能科技有限公司 | Automatic acquisition and identification system of ship light signal |
| CN102646297A (en) * | 2012-04-27 | 2012-08-22 | 徐汉阳 | Intelligent theatre chain attendance statistical system and intelligent theatre chain attendance statistical method |
| CN104361634A (en) * | 2014-12-12 | 2015-02-18 | 上海斐讯数据通信技术有限公司 | Bus toll collection system and passenger wireless terminal |
| CN104376623A (en) * | 2014-11-13 | 2015-02-25 | 青岛龙泰天翔通信科技有限公司 | Single-path embedding type passenger flow analyzing terminal |
| CN104580404A (en) * | 2014-12-22 | 2015-04-29 | 河南机电高等专科学校 | Vehicle running monitoring system based on internet of things and cloud computing |
| CN108520531A (en) * | 2018-05-23 | 2018-09-11 | 安徽富煌科技股份有限公司 | A kind of vehicle door status self-adapting detecting system based on video analysis |
| CN109383144A (en) * | 2018-12-11 | 2019-02-26 | 武汉工程大学 | A kind of printer |
| CN109614057A (en) * | 2018-12-11 | 2019-04-12 | 武汉工程大学 | A kind of printer print system |
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2008
- 2008-12-30 CN CN200810204909A patent/CN101770658A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291338A (en) * | 2010-08-20 | 2011-12-21 | 无锡朗能科技有限公司 | Automatic acquisition and identification system of ship light signal |
| CN102291338B (en) * | 2010-08-20 | 2015-04-22 | 朱瀚 | Automatic acquisition and identification system of ship light signal |
| CN102646297A (en) * | 2012-04-27 | 2012-08-22 | 徐汉阳 | Intelligent theatre chain attendance statistical system and intelligent theatre chain attendance statistical method |
| CN104376623A (en) * | 2014-11-13 | 2015-02-25 | 青岛龙泰天翔通信科技有限公司 | Single-path embedding type passenger flow analyzing terminal |
| CN104361634A (en) * | 2014-12-12 | 2015-02-18 | 上海斐讯数据通信技术有限公司 | Bus toll collection system and passenger wireless terminal |
| CN104361634B (en) * | 2014-12-12 | 2017-12-22 | 上海斐讯数据通信技术有限公司 | A kind of bus toll collection system and passenger's wireless terminal |
| CN104580404A (en) * | 2014-12-22 | 2015-04-29 | 河南机电高等专科学校 | Vehicle running monitoring system based on internet of things and cloud computing |
| CN108520531A (en) * | 2018-05-23 | 2018-09-11 | 安徽富煌科技股份有限公司 | A kind of vehicle door status self-adapting detecting system based on video analysis |
| CN109383144A (en) * | 2018-12-11 | 2019-02-26 | 武汉工程大学 | A kind of printer |
| CN109614057A (en) * | 2018-12-11 | 2019-04-12 | 武汉工程大学 | A kind of printer print system |
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Application publication date: 20100707 |