Summary of the invention
The objective of the invention is for solve tunnel portal of highway a little less than reflection alarming device early warning signal under the weather of visibility poor, the problem of guiding function difference, provide a kind of early warning signal strong tunnel LED light guidance system.
A kind of tunnel LED light guidance system of the present invention comprises signal display apparatus and control device and lead; Particularly described signal display apparatus is the active road sign of LED; Signal control device is active road sign controller;
The active road sign of described LED comprises the road sign body, and the road sign body is provided with Connection Block, and Connection Block is provided with installing hole; Be provided with LED in the road sign body, this LED is connected with the constant-current drive circuit output, and all is fixed on the support plate; Support plate is installed in the road sign body; The road sign body also is provided with power line perforation and translucent cover, and translucent cover is installed in road sign body front; Constant-current drive circuit is by two triode Q
3, Q
4And resistance R
8, R
9Constitute Q
3Colelctor electrode connects the input power positive end, launches very constant-current drive circuit output plus terminal, and base stage is connected with the Q4 colelctor electrode and through R
8Connect the input power positive end; Q
4Emitter stage is through R
9Ground connection, base stage are constant-current drive circuit output negative terminal and ground connection;
Described active road sign controller comprises Switching Power Supply, filter circuit of pressure-stabilizing, oscillating circuit and amplification driving circuit; Described oscillating circuit is by 555 ic chips
2, resistance R
1, R
2, R
3, R
4And relay J
1, J
2, J
3Form; IC
24,8 pin and R
4One end all is connected with the filter circuit of pressure-stabilizing output; R
4Another termination IC
27 pin, and and R
1, R
2, R
3One end connects, R
1, R
2, R
3The other end passes through J respectively
1, J
2, J
3With IC
26 pin connect; IC
23 pin connect the amplification driving circuit input; J
1, J
2, J
3Two couples of normally opened contact K are all arranged
1-1, K
2-1, K
3-1And K
1-2, K
2-2, K
3-2, its K
1-1, K
2-1, K
3-1Connect R respectively
1, R
2, R
3And IC
26 pin; K
1-2, K
2-2, K
3-2Connect amplification driving circuit R respectively
5And Q
1Base stage; J
1, J
2, J
3Control loop be provided with an optional K switch, the optional J that connects of optional switch
1Or J
2Or J
3
The constant-current drive circuit output of the active road sign of LED 3 LED that can be connected in series among the present invention.
The road sign body of the active road sign of described LED can be cylindrical shape, and it is circular that translucent cover and support plate homogeneous phase should be, and support plate is provided with 9 LED and 3 constant-current drive circuits, each constant-current drive circuit output 3 LED that all are connected in series.
Described road sign body also can be short groove bar shaped, and its two ends are respectively equipped with end cap, and end cap is provided with the power line perforation; Translucent cover and support plate homogeneous phase should be bar shaped, and support plate is provided with 6 LED and 2 constant-current drive circuits, each constant-current drive circuit output 3 LED that all are connected in series; This groove bar shaped road sign body bottom surface vertical line and Connection Block side joint face intersect that angle β, this β are arranged is 20 °--and 30 °.
Described road sign body also can be the elongated slot bar shaped, and its two ends are respectively equipped with end cap, and end cap is provided with the power line perforation; Translucent cover and support plate homogeneous phase should be bar shaped, and support plate is provided with 12 LED and the moving circuit of 4 constant current white horses with a black mane, each constant-current drive circuit output 3 LED that all are connected in series; This groove bar shaped road sign body bottom surface is vertical with Connection Block side joint face.
Optional K switch in the described active road sign controller can be hand switch or automatic switch; Relay can be electromagnetic relay.
Described active road sign controller output end can be connected in parallel to cylindrical shape, short groove bar shaped, three groups of active road signs of LED of elongated slot bar shaped.
Advantage of the present invention is: it is light source that the active road sign of LED adopts LED, can active illuminating, power saving; The variation power supply of the exportable 24V to 0V of active road sign controller can make the active road sign flash of light of LED of connection, and three kinds of different frequencies of oscillation that can have changes with three relays.Early warning signal is strong under inclement weather conditions such as dense fog, sleet, guiding function good.
The specific embodiment
Shown in Figure 1, be used for a kind of tunnel LED light guidance system of tunnel SD, form by the active road sign LR1 of LED, LR2, LR3, active road sign controller KT and lead L.
Fig. 2, Fig. 3, shown in Figure 8, the active road sign of described LED comprises columnar road sign body 1, and this road sign body 1 is provided with the Connection Block 3 that is connected as a single entity, and Connection Block 3 is provided with two installing holes 7; Be provided with 9 LEDs 2 in the road sign body 1, this LED is connected with the constant-current drive circuit output, and all is fixed on the circular support plate 5; Support plate 5 is installed in the road sign body 1; Road sign body 1 also is provided with power line perforation 6 and circular translucent cover 4, and translucent cover 4 is installed in road sign body 1 front; Constant-current drive circuit is by two triode Q
3, Q
4And resistance R
8, R
9Constitute Q
3Colelctor electrode connects the input power positive end, launch very that constant-current drive circuit output plus terminal, base stage are connected with the Q4 colelctor electrode and through R
8Connect the input power positive end; Q
4Grounded emitter, base stage are constant-current drive circuit output negative terminal, and through R
9Ground connection.Its support plate is provided with 9 LED and 3 constant-current drive circuits, each constant-current drive circuit output 3 LED that all are connected in series.
Fig. 4, Fig. 5, shown in Figure 8, the active road sign of described LED comprises road sign body 1, and road sign body 1 is equipped with Connection Block 3, and Connection Block 3 is provided with installing hole 7; Be provided with LED 2 in the described road sign body 1, this LED is connected with the constant-current drive circuit output, and is fixed on the support plate 5; Support plate 5 can be pegged graft and is installed in the road sign body 1 corresponding groove; Road sign body 1 also is provided with power line perforation and transparent 4 covers, and translucent cover 4 is installed in road sign body 1 front; Constant-current drive circuit is also by two triode Q
3, Q
4And resistance R
8, R
9Constitute.This road sign body is short groove bar shaped, and its two ends are respectively equipped with end cap, and end cap is provided with the power line perforation; Translucent cover and support plate homogeneous phase should be bar shaped; Support plate is provided with 6 LED and 2 constant-current drive circuits, each constant-current drive circuit output 3 LED that all are connected in series; The bottom surface of this groove bar shaped road sign body and Connection Block side joint face intersect that angle β, this β are arranged is 20 °-30 °.
Fig. 6, Fig. 7, shown in Figure 8, the active road sign of described LED, its composition is identical with the active road sign of LED of the short-and-medium groove bar shaped of Fig. 4, and the difference part is: this road sign body is the elongated slot bar shaped, support plate is provided with 12 LED and 4 constant-current drive circuits, each constant-current drive circuit output 3 LED that all are connected in series; Elongated slot bar shaped road sign body bottom surface is vertical with Connection Block side joint face.
In the active road sign of the LED of described groove bar shaped, more a plurality of LED and corresponding a plurality of constant-current drive circuit can also have been designed.Be provided with constant-current drive circuit among the present invention, even input voltage fluctuates between 11V-26V, but constant-current driving LEDs all can adapt to the input voltage fluctuation of relative broad range.Light source can adopt the super brightness yellow light LED, and MCD is more than 3000.
As shown in Figure 9, described active road sign controller comprises Switching Power Supply, filter circuit of pressure-stabilizing, oscillating circuit and amplification driving circuit;
Described Switching Power Supply can be made up of transformer and rectifier bridge, and its input AC220V alternating current, output DC24V direct current are for the The whole control circuit provides working power; Filter circuit of pressure-stabilizing is by three-terminal regulator block IC
17850, capacitor C
1, C
2Form, for oscillating circuit provides voltage-stabilized power supply; Amplification driving circuit is by amplifying triode Q
1, large power triode Q
2And resistance R
5, R
6, R
7Form Q
2Colelctor electrode connects the DC24V power positive end, launches very circuit output end, is connected with the active road sign LR of LED; R
6Connect power positive end and Q
2Base stage is Q
2Colelctor electrode triggering and conducting biasing resistor; R
5Meet Q
1Base stage; Q
1Colelctor electrode is through R
7Meet Q
2Base stage, Q
1Grounded emitter; The amplification driving circuit input/output terminal connects oscillating circuit and load respectively; R
5And Q
1Be provided with relay normally open contact K between the base stage
1-2, K
2-2, K
3-2, its effect is to prevent IC
23 human hair combing wastes input Q when giving birth to rub-out signal
1Base stage.
Described oscillating circuit is by 555 ic chips
2, resistance R
1, R
2, R
3, R
4With electromagnetic relay J
1, J
2, J
3Form.IC
24,8 pin and R
4All connect the voltage-stabilized power supply anode; R
4One termination filter circuit of pressure-stabilizing output; The other end and R
1, R
2, R
3One end links to each other and and IC
27 pin connect R
1, R
2, R
3The other end pass through relay J respectively
1, J
2, J
3Normally opened contact K
1-1, K
2-1, K
3-1Meet IC
26 pin; IC
21,2 pin ground connection and meet C respectively
2 IC
23 pin be the control signal output, meet the R in the amplification driving circuit
5When the gauge tap choosing meets J
1, J
2, J
3After, IC in the oscillating circuit
23 pin just export the control signal of a corresponding frequency of oscillation, and input amplification driving circuit.
Described relay J
1, J
2, J
3Be electromagnetic relay, J
1, J
2, J
3All have two couples of normally opened contact K
1-1, K
2-1, K
3-1And K
1-2, K
2-2, K
3-2, K wherein
1-1, K
2-1, K
3-1Connect R respectively
1, R
2, R
3And IC
26 pin; K
1-2, K
2-2, K
3-2Connect R respectively
5And Q
1Base stage; J
1, J
2, J
3The control circuit that is connected in parallel is provided with optional K switch, and optional K switch is manual or automatic, and the selectable flash of light frequency range of three retainings is all arranged.Automatic optional switch can external visibility detector or PLC device able to programme, realizes control automatically.
After entire circuit of the present invention was connected power supply, oscillating circuit was started working, IC
23 pin output under high level and low level two states, change.Work as IC
23 pin output low levels the time, triode Q
1By, Q
2Conducting; During the output high level, triode Q
1Conducting, Q
2End, like this Q
2Emitter stage and ground between the variation power supply of a 24V to 0V is just arranged, the active road sign LR of LED is from Q
2In parallel picking out between emitter stage and the ground will present phosphere.The exportable three kinds of different frequencies of oscillation of described oscillating circuit, three kinds of different frequencies of oscillation are manually or automatically to change under the control in optional K switch with three relays.
Shown in Figure 9, when using on tunnel SD, active road sign controller divides three tunnel be connected in parallel respectively three groups of active road sign LR1 of LED, LR2, LR3 by lead L, and columnar LR1 separates on the highway both sides that are arranged on outside the tunnel face; One group of LR2 of short groove bar shaped separates and is installed in the tunnel on the both sides People's Bank of China platform where rites are performed side; The LR3 separation of groove bar shaped is installed on the top, tunnel face.Active road sign controller is controlled simultaneously and is respectively organized the active road sign flash of light of LED, three kinds of different flashing rates can be not so good with highway visibility, visibility is relatively poor, three class situations of the special difference of visibility are corresponding, and flashing rate can be respectively 80 times/minute, 150 times/minute, 250 times/minute.