CN101996498A - PCI (Programmable Communications Interface) direct-type traffic light acquisition card - Google Patents
PCI (Programmable Communications Interface) direct-type traffic light acquisition card Download PDFInfo
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- CN101996498A CN101996498A CN 201010166346 CN201010166346A CN101996498A CN 101996498 A CN101996498 A CN 101996498A CN 201010166346 CN201010166346 CN 201010166346 CN 201010166346 A CN201010166346 A CN 201010166346A CN 101996498 A CN101996498 A CN 101996498A
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Abstract
The invention discloses a PCI (Programmable Communications Interface) direct-type traffic light acquisition card relating to the field of electrical design and comprising a substrate. The substrate is provided with a traffic light state acquisition circuit, a processor, a camera motor voltage output circuit and a communication interface, wherein the traffic light state acquisition circuit and the camera motor voltage output circuit are respectively and electrically connected with the processor; the processor is electrically connected with the communication interface for the processor and external control equipment to communicate; the substrate is also provided with a PCI; and the PCI is provided with a first power input pin for inputting the working voltage signal of the acquisition card and a motor power input pin which is used for inputting a motor driving voltage signal.
Description
Technical field
The present invention relates to electrical design field, relate in particular to a kind of traffic lights capture card.
Background technology
The traffic lights capture card is applied in motor vehicle and makes a dash across the red light in the automatic capturing system, need to gather in real time the state of red, the green light of traffic signals, as one of condition of automatic candid photograph, when motor vehicle makes a dash across the red light behavior, be that red light is captured automatically, green light is not captured.
The existing motor vehicle automatic capturing system that makes a dash across the red light mainly comprises industrial computer and traffic lights capture card,
The structure of existing traffic lights capture card is mainly as follows: existing traffic lights capture card mainly is installed in the box, places the outside of industrial computer.That the traffic lights capture card is directly introduced is red, the 220V alternating current in the green light system, the traffic lights capture card is provided with high-low pressure voltage dress and changes circuit, carry out voltage transitions, obtain the operating voltage of 3.3V and the driving voltage of camera, the traffic lights capture card is provided with 220V traffic lights voltage acquisition module, RS232 input interface, RS232 output interface, control module, high power amplifier circuit.
Wherein voltage conversion circuit is used to carry out voltage transitions, power to each parts of this capture card, and to the video camera outputting drive voltage; Red, green light voltage acquisition module is connected respectively with the 220V power supply of each traffic lights of outside, confirms that according to its voltage condition each is red, the on off state of green light, and the information of on off state is inputed to processor; The RS232 input interface is used for inserting the control signal of outside (industrial computer or other control device), and the RS232 output interface is used for exporting to the outside result or the information of this capture card; Control module is the core processing unit of this capture card, is used to control the work of each parts of this capture card, and the communicating by letter of control and industrial computer; The high power amplifier circuit is used for the control according to control module, switches the output of webcam driver voltage, with the focusing of control camera.
The inventor finds that there is following defective in existing capture card in carrying out creation process of the present invention:
1, owing to directly introducing the 220V high-tension current, existing traffic lights capture card master powers, simultaneously high-voltage signal, low-voltage signal again on this traffic lights capture card, make the wiring difficulty, complicated comparatively of capture card, its design cost, manufacturing cost are higher.And, the problem that 220V overtension fault causes burning circuit may take place.
2, owing to directly introducing the 220V high-tension current, existing traffic lights capture card master powers, simultaneously high-voltage signal, low-voltage signal again on this traffic lights capture card, electromagnetic interference (EMI) on the capture card is bigger, wiring, original paper are provided with and careless slightlyly may cause the signals collecting distortion, influence system works.
3, the address setting of existing traffic lights capture card adopts plucking number sign switch that the integrated circuit board address is set, and in the operating process of reality, may come in contact bad and causes error in address, causes the problem of communication failure.
4, surveying the 220V power supply of directly introducing traffic lights for the switch of traffic lights on the existing traffic lights capture card surveys, in the process of using, the hidden danger that exists possibility to cause burning circuit owing to the power supply overtension of traffic lights.
5, existing traffic lights capture card is selected the output of high power amplifier circuit as switch control motor driven voltage for use, in existing circuit, select the high power amplifier of big electric current for use, its electric current that passes through reaches as high as more than ten ampere, can realize the output switch control of drive current though adopt this high power amplifier, but, because the volume of high power amplifier is bigger, occupation space is more on circuit board, is unfavorable for circuit-board laying-out and circuit board small sizeization; In addition, the motor driven voltage on the existing traffic lights capture card is disturbed by the high-voltage signal on the capture card easily, exports transient high-current easily, causes the camera circuit burnout easily.
Summary of the invention
First purpose of the present invention is: a kind of traffic lights capture card is provided, and its electric property, communication performance are more stable, easier for installation.
A kind of traffic lights capture card that the embodiment of the invention provides comprises: substrate,
Described substrate is provided with traffic signal light condition Acquisition Circuit, processor, camera electric moter voltage output circuit, communication interface,
Wherein, described traffic signal light condition Acquisition Circuit, camera electric moter voltage output circuit are electrically connected with described processor respectively, and described processor is electrically connected with described communication interface, are used for carrying out communication for the opertaing device of described processor and outside;
Also be provided with pci interface on described substrate, described pci interface is provided with first power supply input pin of the operating voltage signal that is used to import capture card and the motor power input pin that is used to import the motor driven voltage signal.
Alternatively, described traffic signal light condition Acquisition Circuit comprises: filter rectifier, light lotus root buffer circuit, wherein,
Described filter rectifier, the high voltage operation power supply signal that is used for each traffic lights that the outside is inserted carries out rectification, filtering;
Described smooth lotus root buffer circuit is electrically connected with described filter rectifier and processor respectively, is used for the electrical signal conversion of described filter rectifier output is become switching signal, exports the defeated switching signal of institute to described processor.
Alternatively, described camera electric moter voltage output circuit comprises: transistor amplifier circuit,
Wherein, described transistor amplifier circuit is electrically connected with the motor driven voltage signal of input on described processor and the pci interface respectively, is used for the output according to the described motor driven voltage signal of the instruction control of described processor.
Alternatively, also be electrically connected with shunt resistance at the output terminal of described transistor amplifier circuit, the motor load of described shunt resistance and camera is in parallel.
Alternatively, described communication interface is: the RS232 serial line interface.
Alternatively, more than one of described communication interface,
Wherein, described arbitrary communication interface is the RS232 serial line interface, perhaps the winding displacement interface.
Therefore, owing on the traffic lights capture card, be provided with the PCI capture card among the present invention, can directly it be inserted in the PCI slot of opertaing device when mounted by pci interface 105, make that installation is simpler.
In addition, with respect to existing capture card, the traffic lights capture card of present embodiment is directly directly introduced corresponding low-voltage DC by pci interface from opertaing device, so can reduce that all wiring in the capture card of the prior art is complicated, wiring cost is high and electromagnetic interference (EMI), problem that stability is low, and save design cost, manufacturing cost.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute to improper qualification of the present invention, in the accompanying drawings:
The structural representation of a kind of traffic lights capture card that Fig. 1 provides for the embodiment of the invention 1;
The another kind of structural representation of a kind of traffic lights capture card that Fig. 2 provides for the embodiment of the invention 2;
The circuit theory of the traffic signal light condition Acquisition Circuit 101 in the capture card structural drawing that Fig. 3 provides for the embodiment of the invention 1 realizes synoptic diagram;
The circuit theory of the camera electric moter voltage output circuit 103 in the capture card structural drawing that Fig. 4 provides for this embodiment of the invention 1 realizes synoptic diagram.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
Embodiment 1:
Referring to shown in Figure 1, a kind of traffic lights capture card that present embodiment provides mainly comprises: substrate 100 and be arranged on traffic signal light condition Acquisition Circuit 101, processor 102, camera electric moter voltage output circuit 103, the communication interface 104 on the substrate 100 and be installed in pci interface 105 on the substrate 100.The circuit connecting relation and the principle of work of each parts are as follows:
This pci interface 105 is provided with first power supply input pin of the operating voltage signal that is used to import capture card and the motor power input pin that is used to import the motor driven voltage signal.In use, be inserted into by pci interface 105 in the PCI slot of opertaing device (being such as but not limited to be industrial computer): working current of each parts of this capture card (being generally 3.3V) and the voltage signal (being generally 12V) that need be input to the motor of controlled video camera by capture card by obtaining low-voltage DC from opertaing device on the PCI slot.
Wherein, traffic signal light condition Acquisition Circuit 101 is electrically connected with the power supply of each traffic lights of outside, be used for power supply state according to traffic lights, determine the on off state of each traffic lights, and the state of opening the light of each traffic lights inputed to processor 102, processor 102 is according to the on off state and the expectant control rule of each traffic lights, and the control shooting has electric moter voltage output circuit 103, is used for the work of the video camera of more empty traffic conditions with control.
The voltage signal of the motor of the video camera that inserts on camera electric moter voltage output circuit 103 and the pci interface 105, camera electric moter voltage output circuit 103 is according to the control signal of processor 102 and the output of switched voltage signal, such as, can export+12V or-the 12V d. c. voltage signal, be used for the zoom motor of controls lens, issue the voltage both positive and negative polarity that related command changes output by opertaing device (industrial computer) to the processor 102 of this capture card, reach the zooming range of controls lens.
Therefore, owing on the traffic lights capture card, be provided with the PCI capture card in the present embodiment, can directly it be inserted in the PCI slot of opertaing device when mounted by pci interface 105, make that installation is simpler.
In addition, with respect to existing capture card, the traffic lights capture card of present embodiment is directly directly introduced corresponding low-voltage DC by pci interface 105 from opertaing device, so can reduce that all wiring in the capture card of the prior art is complicated, wiring cost is high and electromagnetic interference (EMI), problem that stability is low, and save design cost, manufacturing cost.
Referring to shown in Figure 2, in order further to improve the stability of traffic lights capture card, traffic signal light condition Acquisition Circuit 101 can be arranged to following structure in the present embodiment:
This traffic signal light condition Acquisition Circuit 101 comprises: filter rectifier 1011, light lotus root buffer circuit 1012.Wherein, the high voltage operation voltage signal of 1011 pairs of outside traffic lights that insert of filter rectifier carries out rectifying and wave-filtering, and it is inputed to light lotus root buffer circuit 1012;
The input end of light lotus root buffer circuit 1012 and described filter rectifier 1011, output terminal is electrically connected with processor 102, is used for converting the voltage signal of described filter rectifier 1011 to switching signal, exports the defeated switching signal of institute to described processor 102.
The specific implementation circuit can be as shown in Figure 3, in circuit, resistance R (such as can but be limited to be 100K) the operating voltage signal of each traffic lights that can insert the outside carries out dividing potential drop, commutation diode D (can but be not limited to IN4007) carries out rectification to input current, filter capacitor C carries out filtering to electric current, the filtered electric signal of whole step-down rectifier inputs to light lotus root U, light lotus root U (can but be not limited to select for use P521-1) is according to the voltage signal output 0V level of input or open leakage, and it is passed to processor 102 respectively handles.
In addition, described referring to Fig. 4, for make to the camera motor may be more stable, present embodiment can also be designed to form shown in Figure 4 with camera electric moter voltage output circuit 103:
In this circuit, use vigilant the amplification to control as switch, to camera motor outputting drive voltage signal:: processor 102 receives industrial computers can issue the order of adjusting lens focus by the RS232 communication port, high speed processor 102 receives orders the back by control A, the level of B end, difference oxide-semiconductor control transistors Q2, the conducting of Q3 and ending, Q2, Q3 control respectively Q1 (connect+12V), Q4 (connects-12V) conducting and ending, play the effect of switch exactly, just finally reach the output of control OUT end, negative 12V voltage, be used for the zoom motor of controls lens, reach the zooming range of controls lens:
When control port B is 0V, when control port A is 0V, the Q2 conducting, the Q4 conducting, the OUT end is-12V;
When control port B was 3.3V, control port A was 3.3V, the Q3 conducting, and the Q1 conducting, OUT holds and is+12V, and Q2 ends, and Q4 ends, and-12V is obstructed.
In addition, can also and meet shunt resistance R15 at voltage output end, shunt resistance R15 plays the effect of shunting, prevents that electric current is excessive, damages or burn the motor of camera.
Can be provided with a plurality of communication interfaces 104 in the present embodiment, such as a RS232 serial line interface and a winding displacement interface that mates with opertaing device (industrial computer) can be set therein.
More than the technical scheme that the embodiment of the invention provided is described in detail, used specific case herein the principle and the embodiment of the embodiment of the invention are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1. traffic lights capture card comprises: substrate,
Described substrate is provided with traffic signal light condition Acquisition Circuit, processor, camera electric moter voltage output circuit, communication interface,
Wherein, described traffic signal light condition Acquisition Circuit, camera electric moter voltage output circuit are electrically connected with described processor respectively, and described processor is electrically connected with described communication interface, are used for carrying out communication for the opertaing device of described processor and outside; It is characterized in that,
Also be provided with pci interface on described substrate, described pci interface is provided with first power supply input pin of the operating voltage signal that is used to import capture card and the motor power input pin that is used to import the motor driven voltage signal.
2. traffic lights capture card according to claim 1 is characterized in that,
Described traffic signal light condition Acquisition Circuit comprises: filter rectifier, light lotus root buffer circuit, wherein,
Described filter rectifier, the high voltage operation power supply signal that is used for each traffic lights that the outside is inserted carries out rectification, filtering;
Described smooth lotus root buffer circuit is electrically connected with described filter rectifier and processor respectively, is used for the electrical signal conversion of described filter rectifier output is become switching signal, exports the defeated switching signal of institute to described processor.
3. traffic lights capture card according to claim 1 is characterized in that, described camera electric moter voltage output circuit comprises: transistor amplifier circuit,
Wherein, described transistor amplifier circuit is electrically connected with the motor driven voltage signal of input on described processor and the pci interface respectively, is used for the output according to the described motor driven voltage signal of the instruction control of described processor.
4. traffic lights capture card according to claim 3 is characterized in that,
Output terminal at described transistor amplifier circuit also is electrically connected with shunt resistance, and the motor load of described shunt resistance and camera is in parallel.
5. traffic lights capture card according to claim 1 is characterized in that,
Described communication interface is: the RS232 serial line interface.
6. traffic lights capture card according to claim 1 is characterized in that,
More than one of described communication interface,
Wherein, described arbitrary communication interface is the RS232 serial line interface, perhaps the winding displacement interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010166346 CN101996498B (en) | 2009-08-25 | 2010-04-14 | PCI (Programmable Communications Interface) direct-type traffic light acquisition card |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910042160 | 2009-08-25 | ||
| CN200910042160.1 | 2009-08-25 | ||
| CN 201010166346 CN101996498B (en) | 2009-08-25 | 2010-04-14 | PCI (Programmable Communications Interface) direct-type traffic light acquisition card |
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| Publication Number | Publication Date |
|---|---|
| CN101996498A true CN101996498A (en) | 2011-03-30 |
| CN101996498B CN101996498B (en) | 2012-12-19 |
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| CN 201010166346 Expired - Fee Related CN101996498B (en) | 2009-08-25 | 2010-04-14 | PCI (Programmable Communications Interface) direct-type traffic light acquisition card |
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| CN1516366A (en) * | 2003-01-06 | 2004-07-28 | 西北工业大学 | System for monitoring going through stop light based on DSP |
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| CN2847411Y (en) * | 2005-11-24 | 2006-12-13 | 中国科学院自动化研究所 | Electronic police device |
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| CN101170695A (en) * | 2007-11-15 | 2008-04-30 | 四川川大智胜软件股份有限公司 | Built-in image collection and network transmission platform based on MIPS architecture |
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- 2010-04-14 CN CN 201010166346 patent/CN101996498B/en not_active Expired - Fee Related
Patent Citations (5)
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|---|---|---|---|---|
| CN1516366A (en) * | 2003-01-06 | 2004-07-28 | 西北工业大学 | System for monitoring going through stop light based on DSP |
| CN1678087A (en) * | 2004-03-31 | 2005-10-05 | 迈普（四川）通信技术有限公司 | Single-plate hot-plug-pull controlling method and board with hot plug-pull controlling module |
| CN2847411Y (en) * | 2005-11-24 | 2006-12-13 | 中国科学院自动化研究所 | Electronic police device |
| CN1971658A (en) * | 2005-11-24 | 2007-05-30 | 中国科学院自动化研究所 | An electronic police system and method thereof |
| CN101170695A (en) * | 2007-11-15 | 2008-04-30 | 四川川大智胜软件股份有限公司 | Built-in image collection and network transmission platform based on MIPS architecture |
Non-Patent Citations (2)
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| 《中国优秀博硕士学位论文全文数据库（硕士）信息科技辑》 20061015 陈广秋 基于视频的违章车辆自动抓拍系统的研究 21-29 1-6 , * |
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Granted publication date: 20121219 Termination date: 20140414 |