CN107059679A - Based on monolithic processor controlled ight deceleration strip - Google Patents

Based on monolithic processor controlled ight deceleration strip Download PDF

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Publication number
CN107059679A
CN107059679A CN201710150755.3A CN201710150755A CN107059679A CN 107059679 A CN107059679 A CN 107059679A CN 201710150755 A CN201710150755 A CN 201710150755A CN 107059679 A CN107059679 A CN 107059679A
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China
Prior art keywords
deceleration strip
resistance
chip microcomputer
led
deceleration
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Granted
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CN201710150755.3A
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Chinese (zh)
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CN107059679B (en
Inventor
余鹏
陈敏祥
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CN201710150755.3A priority Critical patent/CN107059679B/en
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Publication of CN107059679B publication Critical patent/CN107059679B/en
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Abstract

Monolithic processor controlled ight deceleration strip is based on the invention discloses one kind, it mainly includes deceleration band body, in addition to main control module, LED night light sources, ultrasonic distance detection module.Pass through ultrasonic distance detection module ranging, main control module adjusts the bright-dark degree for the LED night light sources for being arranged at deceleration band body side according to spacing, so as to realize night long distance luminescence enhancement, the alerting pattern of luminescent decay during low coverage, the problem of deceleration strip when solving night on road surface is not eye-catching enough, be conducive to saving the energy simultaneously, and it is humanized, can prevent vehicle close to when do not see road ahead information because light-source brightness is larger the problem of generation so that night traffic safety accident occur probability be greatly reduced.In addition, the control circuit structure of the present invention is simple, cost is relatively low, it is easy to accomplish.

Description

Based on monolithic processor controlled ight deceleration strip
Technical field
Monolithic processor controlled ight deceleration strip is based on the present invention relates to a kind of deceleration strip, more particularly to one kind.
Background technology
At present, on urban road sharp turn, ramp, crossing or school, Residential Quarter Entrance etc., which can often be set, to be subtracted Speed belt, to reach that vehicle had not only ensured safety under steam but also played buffer deceleration purpose, to be avoided as much as some traffic things Therefore generation.But the deceleration strip on night, road surface then seems not eye-catching enough, therefore vehicle may be by when close to deceleration strip In unsighted deceleration strip and non-pre-decelerating so that vehicle when by deceleration strip because excessive velocities cause shake violent, and And same easily initiation traffic accident.
Currently existing scheme is typically to increase a kind of light source on deceleration strip, is had herein will reach vehicle in night prompting Deceleration strip.The characteristics of having brightness height, low power consumption, long lifespan because of LED illumination, this night light source can use LED, but this Scheme has following two shortcomings:
1. it is shinny to need the night light source to continue, this will cause larger energy loss.
2. vehicle close to when, because deceleration strip is luminous, road surface brightness is higher, the myosis of human eye a so that distant place The visual field is relatively dimmed, if there is pedestrian's process at deceleration strip rear, driver may can't see the pedestrian, so that continue traveling, Therefore be still possible to trigger traffic accident.
The content of the invention
In view of the shortcomings of the prior art, the present invention proposes a kind of based on monolithic processor controlled ight deceleration strip, the deceleration strip Can be in noctilucence, and luminous intensity can change, distance with the change that will reach vehicle and the distance between deceleration strip When big, luminous intensity is big, and apart from hour, luminous intensity is also small, is not lighted then when being travelled on road surface without vehicle, is conducive to reducing Energy consumption, while the control circuit structure is simple, it is easy to accomplish.
In order to achieve the above object, the technical solution adopted by the present invention is as follows:One kind is subtracted based on monolithic processor controlled ight Speed belt, it includes deceleration band body, in addition to main control module, LED night light sources, ultrasonic distance detection module.
Described main control module includes single-chip microcomputer, crystal oscillating circuit, high-power LED drive circuit, power supply, mu balanced circuit;Institute The single-chip microcomputer stated 3.3V power voltage supplies;Described crystal oscillating circuit includes crystal oscillator, electric capacity C1, electric capacity C2;The one of the electric capacity C1 Hold and be connected with the input end of clock mouthful XTAL1 of single-chip microcomputer and one end of crystal oscillator, C1 other ends ground connection;Described electric capacity C2 one end It is connected with the input end of clock mouthful XTAL2 of single-chip microcomputer and the other end of crystal oscillator, C2 other end ground connection;Described great power LED Drive circuit includes resistance R1, NPN triode V1, resistance R2, photoelectrical coupler OC, resistance R3, the pole of NPN triode V2, PNP tri- Pipe V3, resistance R4, resistance R5, metal-oxide-semiconductor Q, resistance R6 compositions;R1 one end is connected with the PWM pins of single-chip microcomputer, the base of a termination V1 Pole;V1 grounded emitter, colelctor electrode connects the negative pole of light emitting diode in OC;The positive pole of light emitting diode meets R2 in OC;R2's Another termination 5V voltages;The grounded emitter of phototriode in OC, colelctor electrode and V2, V3 base stage, R3 are connected;R3's is another The colelctor electrode at end, R6 one end and V2 connects 12V voltages;V3 grounded collector;V2, V3 emitter stage are connected with R4;R4's is another One end is connected with R5, Q grid;The R5 other end and Q source ground;It is appropriate to be accessed between Q drain electrode and the R6 other end The great power LED of quantity;Described power supply, mu balanced circuit provide 3.3V, 5V, 12V supply voltage for control circuit jointly.
Described LED night light sources are several great power LEDs, in the groove of the close vehicle side of deceleration strip.
Described ultrasonic distance detection module, in the groove of the close vehicle side of deceleration strip, the access of its VCC pin 5V, GND pin ground connection, TRIG Trig control signals input pin and ECHO response signals output pin respectively with single-chip microcomputer two Individual I/O mouthfuls is connected.
The beneficial effects of the invention are as follows:
The problem of deceleration strip when the present invention solves night first on road surface is not eye-catching enough.On the other hand, increase is passed through LED night light sources simultaneously control luminous intensity and will reach the relation that the distance between vehicle and deceleration strip are proportionate, greatly Ground reduces luminous energy consumption, and can prevent vehicle close to when because light-source brightness is larger and does not see asking for road ahead information The generation of topic so that the probability that night traffic safety accident occurs is greatly reduced.Meanwhile, the control circuit structure inside deceleration strip Simply, cost is relatively low, it is easy to accomplish.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the circuit diagram being related in present example;
In figure, 1. deceleration band bodies, 2.LED night light sources, 3. ultrasonic distance detection modules.
Specific embodiment
With reference to Figure of description, the present invention is further illustrated.
As shown in figure 1, it includes deceleration band body 1, in addition to main control module, LED night light sources 2, ultrasonic distance are examined Survey module 3.
Shown in Fig. 2 is the electric operation control circuit figure of the present invention, and the circuit is the circuit structure of the luminous situations of three LED of control. As shown in Fig. 2 described main control module includes single-chip microcomputer, crystal oscillating circuit, high-power LED drive circuit, power supply, mu balanced circuit; Described single-chip microcomputer 3.3V power voltage supplies;Described crystal oscillating circuit includes crystal oscillator, electric capacity C1, electric capacity C2;The electric capacity C1's One end is connected with the input end of clock mouthful XTAL1 of single-chip microcomputer and one end of crystal oscillator, C1 other ends ground connection;The one of described electric capacity C2 Hold and be connected with the input end of clock mouthful XTAL2 of single-chip microcomputer and the other end of crystal oscillator, C2 other end ground connection;Described is high-power LED drive circuit includes resistance R1, NPN triode V1, resistance R2, photoelectrical coupler OC, resistance R3, NPN triode V2, PNP Triode V3, resistance R4, resistance R5, metal-oxide-semiconductor Q, resistance R6 compositions;R1 one end is connected with the PWM pins of single-chip microcomputer, a termination V1 Base stage;V1 grounded emitter, colelctor electrode connects the negative pole of light emitting diode in OC;The positive pole of light emitting diode meets R2 in OC; R2 another termination 5V voltages;The grounded emitter of phototriode in OC, colelctor electrode and V2, V3 base stage, R3 are connected;R3's The colelctor electrode of the other end, R6 one end and V2 connects 12V voltages;V3 grounded collector;V2, V3 emitter stage are connected with R4;R4 The other end be connected with R5, Q grid;The R5 other end and Q source ground;Accessed between Q drain electrode and the R6 other end An appropriate number of great power LED;The power supply that described power supply, mu balanced circuit provide 3.3V, 5V, 12V for control circuit jointly is electric Pressure.Inside, which may be selected, in described single-chip microcomputer the processor of PWM generation circuits, such as TMS320F2812;Described photoelectrical coupler Model TLP521-1 product may be selected;Model IRF540 product may be selected in described metal-oxide-semiconductor Q.
Described LED night light sources 2 are several great power LEDs, positioned at the groove of the close vehicle side of deceleration strip 1 It is interior, to ensure that each LED works under rated current, R6 resistance sizes need to be adjusted, to carry out current limliting to LED branch roads.
Described ultrasonic distance detection module 3, in the groove of the close vehicle side of deceleration strip 1, its VCC pin connects Enter 5V, GND pin ground connection, TRIG Trig control signals input pin and ECHO response signals output pin respectively with single-chip microcomputer Two I/O mouthfuls are connected.Basic functional principle is:(1) using I/O mouthfuls of TRIG triggering rangings, it need to be touched to minimum 10us high level Hair;(2) module sends 8 40kHz square wave automatically, and whether automatic detection has signal return;(3) if there is signal return, pass through I/O mouthfuls of ECHO export a high level, and high level duration is exactly ultrasonic wave from the time for being transmitted into return.Finally have: Detecting distance=(the high level time * velocities of sound (340m/s))/2;Described ultrasonic distance detection module, can select model HC-SR04 product.
The course of work of this example is as follows:
The Interruption of CPU timer of single-chip microcomputer is set as 0.2s, in the Interruption, first sets pulse-triggered to believe Number cycle be 1s, i.e., often enter after 5 Interruptions, ultrasonic distance detection module be supplied to by single-chip processor i/o mouth The one a length of 15us in TRIG ends pulse triggering signal, detection module is just started working, and sends ultrasonic wave.If the height electricity at ECHO ends Exceed certain threshold value between usually, then it is assumed that there is no car on road surface herein, the cycle of pulse triggering signal is still then 1s;If ECHO ends High level time be less than threshold value, then it is assumed that vehicle is detected on road surface ahead and close, the cycle of pulse triggering signal is then It is changed into 0.2s, i.e., often enters after 1 Interruption, single-chip microcomputer produces pulse triggering signal, is entered by ultrasonic distance detection module The continuous ranging of row, to adjust the brightness of LED in time.If the high level time at later ECHO ends is more than threshold value, arteries and veins again The cycle for rushing trigger signal is changed into 1s again.
When detection module, which is detected, does not have car on road surface, single-chip microcomputer controls all LED by PWM mouthfuls of output high level Lamp extinguishes;When detection module, which is detected, has car on road surface, single-chip microcomputer first passes through the less PWM ripples of PWM mouthfuls of output duty cycles, and Vehicle will be reached and the distance between deceleration strip is smaller, then dutycycle is bigger, and the luminous intensity of LED is lower.Due to now Every 0.2s rangings, therefore the time interval of LED luminous intensity variations is also 0.2s.
Therefore when car from deceleration strip farther out when, LED luminous intensities are big, and driver can be immediately seen deceleration strip and subtract in advance Speed, when car is nearer from deceleration strip, LED luminous intensities are small, reduce the dazzling degree to driver and reduce luminous energy consumption, work as car After deceleration strip, LED does not just light, and waits have vehicle process next time.
When there is many cars to pass through on road surface, because car generally has before front car light and rear vehicle lamp, the car at rear can see The car of side controls the luminous intensity of LED so as to control itself speed with the car respective distances nearest from deceleration strip.When After the car in front leaves, then the distance between the car and deceleration strip at rear are detected again, the luminous intensity to LED is controlled System.

Claims (1)

1. one kind is based on monolithic processor controlled ight deceleration strip, it is characterised in that it includes deceleration band body, in addition to master control mould Block, LED night light sources, ultrasonic distance detection module;
Described LED night light sources are several great power LEDs, in the groove of the close vehicle side of deceleration strip;
Described main control module includes single-chip microcomputer, crystal oscillating circuit, high-power LED drive circuit, power supply, mu balanced circuit;Described Single-chip microcomputer 3.3V power voltage supplies;Described crystal oscillating circuit includes crystal oscillator, electric capacity C1, electric capacity C2;One end of the electric capacity C1 with The input end of clock mouthful XTAL1 of single-chip microcomputer and one end of crystal oscillator are connected, C1 other ends ground connection;Described electric capacity C2 one end and list The input end of clock mouthful XTAL2 of piece machine and the other end of crystal oscillator are connected, C2 other end ground connection;Described great power LED driving Circuit includes resistance R1, NPN triode V1, resistance R2, photoelectrical coupler OC, resistance R3, NPN triode V2, PNP triode V3, resistance R4, resistance R5, metal-oxide-semiconductor Q, resistance R6 compositions;R1 one end is connected with the PWM pins of single-chip microcomputer, the base of a termination V1 Pole;V1 grounded emitter, colelctor electrode connects the negative pole of light emitting diode in OC;The positive pole of light emitting diode meets R2 in OC;R2's Another termination 5V voltages;The grounded emitter of phototriode in OC, colelctor electrode and V2, V3 base stage, R3 are connected;R3's is another The colelctor electrode at end, R6 one end and V2 connects 12V voltages;V3 grounded collector;V2, V3 emitter stage are connected with R4;R4's is another One end is connected with R5, Q grid;The R5 other end and Q source ground;It is appropriate to be accessed between Q drain electrode and the R6 other end The great power LED of quantity;Described power supply, mu balanced circuit provide 3.3V, 5V, 12V supply voltage for control circuit jointly;
Described ultrasonic distance detection module, in the groove of the close vehicle side of deceleration strip, its VCC pin access 5V, GND pin is grounded, TRIG Trig control signals input pin and ECHO response signals output pin respectively with single-chip microcomputer two I/O mouthfuls are connected.
CN201710150755.3A 2017-03-14 2017-03-14 Based on monolithic processor controlled ight deceleration strip Expired - Fee Related CN107059679B (en)

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CN107059679B CN107059679B (en) 2019-07-09

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102116013A (en) * 2010-12-20 2011-07-06 哈尔滨工业大学 Humanized adaptive speed reducing system and design method thereof
CN202744978U (en) * 2012-07-31 2013-02-20 长安大学 Deceleration strip
CN103556581A (en) * 2013-11-13 2014-02-05 无锡市华昊热能设备有限公司 Warning deceleration strip
KR20150072611A (en) * 2013-12-20 2015-06-30 한국생산기술연구원 Speed bump having led module and control process thereof
CN204510062U (en) * 2015-01-19 2015-07-29 河南城建学院 A kind of runway deceleration strip with safety reminding device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102116013A (en) * 2010-12-20 2011-07-06 哈尔滨工业大学 Humanized adaptive speed reducing system and design method thereof
CN202744978U (en) * 2012-07-31 2013-02-20 长安大学 Deceleration strip
CN103556581A (en) * 2013-11-13 2014-02-05 无锡市华昊热能设备有限公司 Warning deceleration strip
KR20150072611A (en) * 2013-12-20 2015-06-30 한국생산기술연구원 Speed bump having led module and control process thereof
CN204510062U (en) * 2015-01-19 2015-07-29 河南城建学院 A kind of runway deceleration strip with safety reminding device

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Granted publication date: 20190709

Termination date: 20200314