CN204087504U - A kind of road tunnel accident information transmitting system - Google Patents
A kind of road tunnel accident information transmitting system Download PDFInfo
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- CN204087504U CN204087504U CN201420339000.XU CN201420339000U CN204087504U CN 204087504 U CN204087504 U CN 204087504U CN 201420339000 U CN201420339000 U CN 201420339000U CN 204087504 U CN204087504 U CN 204087504U
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Abstract
The utility model relates to a kind of road tunnel accident information transmitting system.Tunnel traffic safe machine electric system control model comprises distribute control and distributed field bus and controls, and the former connects up complexity, and cost is higher, the latter's easy construction, and cost is low, and reliability is high.The utility model comprises master control system and from Ore-controlling Role; Master control system includes main control singlechip, and main control singlechip is connected with keyboard, display and traffic events pilot lamp by corresponding driving circuit, and is connected with host computer by corresponding communication interface; Include from control single-chip microcomputer from Ore-controlling Role, be connected to the main control singlechip of master control system from control single-chip microcomputer by corresponding communication interface; Also horizontal portal motor, track indicator, blower fan and signal lamp is connected with by corresponding driving circuit from control single-chip microcomputer.The utility model adopts Master-Slave Distributive Control structure differentiate tunnel accident place and transmit, for the appointment of control strategy provides foundation.
Description
Technical field
the utility model belongs to Traffic Information Engineering & Control technical field, is specifically related to a kind of road tunnel accident information transmitting system.
Background technology
Vcehicular tunnel is the special road section on highway, space environment is narrow, light change greatly, not only the speed of a motor vehicle is high, the volume of traffic greatly, and motor vehicle exhaust emission is not easily distributed and to cause in tunnel air quality to worsen the visual field unclear, there is potential traffic hazard danger.When particularly there is the emergency such as traffic hazard, fire, traffic guidance is more difficult compared with common section with rescue work, is very easy to if mishandling the generation causing second accident, and its consequence produced is much serious more than primary accident.Therefore, the safety guarantee in long tunnel is the problem of vcehicular tunnel construction and operation management special concern.When there is traffic hazard or fire, how judging timely and accurately, to rescue and be supplied to driver and conductor and effectively to escape induction information, the loss that minimizing accident as much as possible or fire cause and avoid the generation of second accident, is problem demanding prompt solution.
At present, various technological means is applied abroad at freeway tunnel traffic safety, do much work, after the data of collection are carried out pre-service by various field detecting device, in time judged result is supplied to driver in tunnel and central control room by means of communication perfect in tunnel.Tunnel machine electric system design con-trol pattern has two kinds of control modes: a kind of is be applicable to the distribute control pattern compared with short tunnel, a kind of is the distributed field bus control model being applicable to major long tunnel.The former connects up complexity, and cost is higher, is carried out controlling and manage by central control room to field type facility; The latter's easy construction, not only cost is low, and reliability is high.
Summary of the invention
The purpose of this utility model is to provide a kind of road tunnel accident information transmitting system, adopts Master-Slave Distributive Control structure differentiate tunnel accident place and transmit, for the appointment of control strategy provides foundation.
The technical scheme that the utility model adopts is:
A kind of road tunnel accident information transmitting system, is characterized in that:
Comprise master control system and from Ore-controlling Role;
Described master control system includes main control singlechip, and main control singlechip is connected with keyboard, display and traffic events pilot lamp by corresponding driving circuit, and is connected with host computer by corresponding communication interface;
Describedly include from control single-chip microcomputer from Ore-controlling Role, to be connected to the main control singlechip of master control system from control single-chip microcomputer by corresponding communication interface; Also horizontal portal motor, track indicator, blower fan and signal lamp is connected with by corresponding driving circuit from control single-chip microcomputer.
Described main control singlechip with all adopt 89C52 type single-chip microcomputer from controlling single-chip microcomputer;
Described master control system uses 74HC595 chip drives display;
Described master control system uses differential balance type transponder chip MAX487 as the miniwatt transceiver of TTL agreement and 485 protocol conversions;
The described special driving chip L298 from Ore-controlling Role use stepper motor drives horizontal portal motor;
Describedly adopt a NPN type triode amplifying circuit to drive blower fan from Ore-controlling Role.
Described employing from Ore-controlling Role drives blower fan work based on the driving circuit of L298 chip;
Described driving circuit is made up of 8 schottky diode D1-D8, electric capacity C3, C2 and Current amplifier chip L298N; Between the negative pole that electric capacity C3 and C2 is connected in parallel on schottky diode D1-D4 and ground; The positive pole of schottky diode D1-D4 is connected with 2,3,13,14 ports of chip L298N respectively; The negative pole of schottky diode D5-D8 is connected with 2,3,13,14 ports of chip L298N respectively; The positive pole of schottky diode D5-D8 is connected to the ground.
The utility model has the following advantages:
(1) in the control system involved by the utility model, the four figures certificate that display section inputs with four seven segment digital tubes display keyboards, driving circuit adopts 74HC595 chip, have the advantages that speed is fast, power consumption is little, LED number is not limit, the light-emitting diode display of common cathode and common anode pole can be controlled, also can the brightness of control LED, turn off display (data reservation) when being necessary, to reduce power consumption, allow to wake display up at any time.
(2) control system involved by the utility model adopts contact switch key, have cost low, the features such as the latter's life-span is long, in order to overcome the detection erroneous judgement caused by key contacts mechanical shaking, Key dithering measure must be taked, can pay attention to from hardware, software two aspect.When bond number is less, hardware debounce can be adopted, and when pressing bond number and being more, adopt software debounce.Hardware can adopt and add R-S trigger (trigger flip-flop) or monostalbe trigger formation debouncing circuit at key output terminal, trigger is once upset, contact chatter can not produce any impact to it, button exports after bistable circuit, output can become the rectangle square wave of specification, this method is used in the less device of button, and cost performance is very high.The measure that software is taked is: when having detected that button is pressed, after performing the delay procedure of an about 10ms (the concrete time should adjust depending on used button), confirm whether this key level is still kept closed level again, if be still kept closed level, then confirm that this key is in closure state; In like manner, after the release of this key being detected, identical step also should be adopted to confirm, thus the impact of shake can be eliminated.Native system considers installing space and cost performance, and button is also more, therefore have employed software stabilization, and after button is pressed, be provided with button wait release procedure, can ensure the validity that button is pressed and accuracy.
(3) need multiple single chip microcomputer co-ordination in the control system involved by the utility model, carrying out communication between multiple single-chip microcomputer is typical dcs.MCS-51 series monolithic can realize multi-computer communication easily in the feature of hardware aspect.Use a main frame and 4 connected modes from machine in system, the RXD end of main frame is connected with all TXD from machine, and the information that main frame sends can respectively be received from machine.Main frame and each carry out communication from machine and must identify from machine each, this recognition function can be realized by hardware circuit, also can by software simulating.Consider the factors such as the distance that main frame communicates with from machine, system adopts the MAX487 meeting RS-485 standard, utilizes the advantage of RS-485 fiduciary level, realizes the string length distance reliable communication between single-chip microcomputer in some specific communication fields.Specific tasks send data to receive from machine in main frame one end, and ensure to send the reliability of data and processing capacity when making a mistake.
(4) Control system architecture involved by the utility model is simple, with low cost, adopt modular design concept, the keyboard crossing main frame inputs arbitrarily the place had an accident, the place that display display tunnel has an accident, main frame is according to concrete discriminating data place where the accident occurred point, and select suitable to send information from machine, make to select corresponding control strategy from machine, corresponding electromechanical equipment is controlled.
Accompanying drawing explanation
Fig. 1 is the utility model master control system schematic diagram;
Fig. 2 is that the utility model is from Ore-controlling Role schematic diagram;
Fig. 3 is the utility model communication structure block diagram;
Fig. 4 is the utility model single-chip microcomputer and MAX487 connection layout.
Fig. 5 is the driving circuit of the utility model from Ore-controlling Role.
Embodiment
Below in conjunction with embodiment, the utility model is described in detail.
A kind of road tunnel accident information transmitting system that the utility model relates to, adopt modular design concept, the keyboard of main frame is after input has an accident place, the place that system display display tunnel has an accident, main frame is according to concrete discriminating data place where the accident occurred point, and select suitable to send information from machine, make to select corresponding control strategy from machine, corresponding electromechanical equipment is controlled.Concrete structure is:
Comprise master control system and from Ore-controlling Role.Master control system includes main control singlechip, and main control singlechip is connected with keyboard, display and traffic events pilot lamp by corresponding driving circuit, and is connected with host computer by corresponding communication interface.Include from control single-chip microcomputer from Ore-controlling Role, be connected to the main control singlechip of master control system from control single-chip microcomputer by corresponding communication interface; Also horizontal portal motor, track indicator, blower fan and signal lamp is connected with by corresponding driving circuit from control single-chip microcomputer.
Wherein, in system, host computer adopts ordinary PC; Main control singlechip with all adopt 89C52 type single-chip microcomputer from controlling single-chip microcomputer; Master control system uses 74HC595 chip drives display; Master control system uses differential balance type transponder chip MAX487 as the miniwatt transceiver of TTL agreement and 485 protocol conversions; The special driving chip L298 of stepper motor is used to drive horizontal portal from Ore-controlling Role; Adopt a NPN type triode amplifying circuit to drive blower fan from Ore-controlling Role.Transmission medium adopts twisted-pair feeder, and host computer is connected with RS-485 bus by interface module, carries out information transmission with main control singlechip module.The control information that main control singlechip control module receives host computer or the transmission of input through keyboard module sends various operation control command and setting parameter by RS-485 bus to from single chip control module, realize the control to TunnelTrafficControl inducing device model, and show in state display module.
Fig. 1 is the master control system schematic diagram of this vcehicular tunnel mould, Fig. 2 be this vcehicular tunnel mould from Ore-controlling Role schematic diagram, described master control system by main control singlechip, keyboard, host computer, from control single-chip microcomputer, display, traffic events pilot lamp and respective drive circuit and communication interface form; Described main control singlechip is connected with traffic events pilot lamp with keyboard, display by corresponding driving circuit, main control singlechip pass through corresponding communication interface with from controlling single-chip microcomputer, host computer is connected; Described is made up of from Ore-controlling Role horizontal portal motor, track indicator, blower fan, signal lamp and respective drive circuit and communication interface; Described is connected with signal lamp with horizontal portal motor, track indicator, blower fan from control single-chip microcomputer by corresponding driving circuit.
Fig. 3 is this system communication structured flowchart, in system, communication is main frame and from the communication between machine, main frame sends address to from machine, can compare in the address of the machine after receiving address from machine, when address is identical with the machine address, from chance to host response, at this moment main frame will send data to from machine after receiving and replying from machine, performs corresponding operation again from machine according to the data received.Master control system uses differential balance type transponder chip MAX487 as the miniwatt transceiver of TTL agreement and 485 protocol conversions, the interface circuit of 80C52 single-chip microcomputer and MAX487 is very simple, RO and DI meets the data receiving end RXD(P3.0 of the inner serial port of single-chip microcomputer respectively) and data origin TXD(P3.1), Enable Pin RE and DE takies two I/O mouths respectively, in system from machine without shutdown mode, they are coupled together, by a mouth line traffic control.If when environmental requirement is harsh to anti-interference, for improving the reliability of communication, High-Speed Coupled Device can be utilized to be isolated, and Fig. 4 is single-chip microcomputer and MAX487 connection layout.
Fig. 5 is the driving circuit (horizontal portal motor-drive circuit) of the utility model from Ore-controlling Role, this circuit designs based on Current amplifier chip L298N, comprise 8 schottky diodes (D1 ~ D8), electric capacity (C3, C2) simultaneously, wherein the model of schottky diode is BAT54A, effect is the negative peak that absorbing load inductance causes, protect IC; Chip L298N delivery outlet OUT1 ~ 4 connect motor coil; certainly will will produce back-emf, L298 be formed and impacts, easily cause damage; particularly for being greater than supply voltage and negative voltage more easily damages L298N, so all add that on every root line 2 diode BAT54A protect.The course of work is like this: when back-emf is that just, when exceeding power supply+0.7V, upper end diode current flow, such output line is just limited on supply voltage+0.7V, can not exceed this numerical value (to power source charges).When back-emf is negative, during lower than-0.7V, lower end diode current flow, such output line is just limited on-0.7V, is not less than-0.7V.These two diodes use as clamp, and make voltage on output line (or being current potential) be clamped between-0.7V ~+Vcc+0.7V, electric capacity C3 and C2 is Absorption Capacitance, protect IC, absorbing circuit surge and spike.
Content of the present utility model is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading the utility model instructions to any equivalence that technical solutions of the utility model are taked, is claim of the present utility model and contains.
Claims (3)
1. a road tunnel accident information transmitting system, is characterized in that:
Comprise master control system and from Ore-controlling Role;
Described master control system includes main control singlechip, and main control singlechip is connected with keyboard, display and traffic events pilot lamp by corresponding driving circuit, and is connected with host computer by corresponding communication interface;
Describedly include from control single-chip microcomputer from Ore-controlling Role, to be connected to the main control singlechip of master control system from control single-chip microcomputer by corresponding communication interface; Also horizontal portal motor, track indicator, blower fan and signal lamp is connected with by corresponding driving circuit from control single-chip microcomputer.
2. a kind of road tunnel accident information transmitting system according to claim 1, is characterized in that:
Described main control singlechip with all adopt 89C52 type single-chip microcomputer from controlling single-chip microcomputer;
Described master control system uses 74HC595 chip drives display;
Described master control system uses differential balance type transponder chip MAX487 as the miniwatt transceiver of TTL agreement and 485 protocol conversions;
The described special driving chip L298 from Ore-controlling Role use stepper motor drives horizontal portal motor;
Describedly adopt a NPN type triode amplifying circuit to drive blower fan from Ore-controlling Role.
3. a kind of road tunnel accident information transmitting system according to claim 2, is characterized in that:
Described employing from Ore-controlling Role drives blower fan work based on the driving circuit of L298 chip;
Described driving circuit is made up of 8 schottky diode D1-D8, electric capacity C3, C2 and Current amplifier chip L298N; Between the negative pole that electric capacity C3 and C2 is connected in parallel on schottky diode D1-D4 and ground; The positive pole of schottky diode D1-D4 is connected with 2,3,13,14 ports of chip L298N respectively; The negative pole of schottky diode D5-D8 is connected with 2,3,13,14 ports of chip L298N respectively; The positive pole of schottky diode D5-D8 is connected to the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420339000.XU CN204087504U (en) | 2014-06-24 | 2014-06-24 | A kind of road tunnel accident information transmitting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420339000.XU CN204087504U (en) | 2014-06-24 | 2014-06-24 | A kind of road tunnel accident information transmitting system |
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| CN204087504U true CN204087504U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420339000.XU Expired - Fee Related CN204087504U (en) | 2014-06-24 | 2014-06-24 | A kind of road tunnel accident information transmitting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017116325A1 (en) | 2015-12-30 | 2017-07-06 | Hasan Kalyoncu Universitesi | Real time vehicle detection through highway tunnels |
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2014
- 2014-06-24 CN CN201420339000.XU patent/CN204087504U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017116325A1 (en) | 2015-12-30 | 2017-07-06 | Hasan Kalyoncu Universitesi | Real time vehicle detection through highway tunnels |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |