CN201273508Y - Low-energy consumption solar traffic signal lamp - Google Patents

Abstract

The utility model relates to a solar energy traffic light with low power consumption, which belongs to the technical field of signal devices and is used to solve the problems of saving energy and lowering consumption. The technical scheme is that the structure comprises a luminescent diode, an accumulator E and a solar cell panel TY, a rectangular wave generator and a power driven triode are additionally arranged after improvement, the electron collector load of the power driven triode is the luminescent diode, and a signal output end of the rectangular wave generator controls a base electrode of the power driven triode. The solar energy traffic light with low power consumption enables LEDs of a solar energy traffic light to flash according to certain frequency, the brightness can be adjusted, and the electrical power consumption of the traffic light can be greatly lowered.

Description

A kind of low energy consumption solar traffic light

Technical field

The utility model relates to a kind of traffic signals circuit for lamp that power consumption is reduced get off, and belongs to the recoil simulator technical field.

Background technology

The LED light emitting diode belongs to cold light source, because its luminous efficiency is very high, is widely used among various illuminations, the recoil simulator.Solar traffic light mostly adopts the light emitting diode of dot matrix arrangement as light source, and wherein light emitting diode generally adopts DC power supply, meets electricity back LED and is in lasting luminous high brightness state always.The actual evidence of using, LED is not exclusively luminous or do not continue luminously, does not influence the result of use of solar traffic light within the specific limits, but remarkable saves energy.In addition, because the width difference at each crossing, the brightness of desired signal lamp is also just different, when the crossing width hour, the brightness of suitably turning down signal lamp helps economize on electricity.Therefore,, the drive circuit that has solar traffic light now is improved, make the LED of solar traffic light not exclusively luminous or lasting luminous in order to reach energy saving purposes, and adjustable brightness, be very important.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of low energy consumption solar traffic light that can significantly reduce the signal lamp energy consumption is provided.

The alleged problem of the utility model realizes with following technical proposals:

A kind of low energy consumption solar traffic light, comprise light emitting diode, battery and solar panel in the formation, after the improvement, set up square-wave generator and power drive triode, the collector load of described power drive triode is a light emitting diode, the base stage of the signal output part control power drive triode of square-wave generator.

Above-mentioned low energy consumption solar traffic light, described square-wave generator is one, and what be made of operational amplifier is the hysteresis loop comparator of feedback network with the RC integrating circuit, between RC integrating circuit and hysteresis loop comparator output, potentiometer is set, the RC integrating circuit connects the two ends of potentiometer, the output of the slip termination hysteresis loop comparator of potentiometer through the opposite diode of both direction.

The utility model utilizes square-wave generator to produce the square-wave signal of certain frequency, it is luminous by certain frequency that signal controlling power drive triode makes the light emitting diode in the solar traffic light thus, the diode that potentiometer and both direction are opposite is used to regulate the forward and reverse charge constant of RC feedback network, change the dutycycle of square-wave signal, adjust the brightness of light emitting diode.The utility model can make the LED of solar traffic light glittering by certain frequency, and adjustable brightness, can reduce the power consumption of signal lamp greatly.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is an electric theory diagram of the present utility model;

Fig. 2 is an electrical schematic diagram of the present utility model;

Fig. 3 is the oscillogram of square-wave generator input and output end signal.

Each label is among the figure: F, operational amplifier; Q, power drive triode; LED, light emitting diode; Dz, bi-directional voltage stabilizing pipe; R _W, potentiometer; D1, D2, diode; C, electric capacity; R ₁～R ₄, resistance; E, battery; TY, solar panel.

Used symbol: u in the literary composition _o, the square-wave generator output voltage; + U _Z, the voltage-stabiliser tube forward voltage;-U _Z, the voltage-stabiliser tube backward voltage; + U _T, Upper threshold voltage;-U _T, lower threshold voltage; u _N, the reverse input end current potential; u _PThe positive input current potential;

The specific embodiment

Led light source is with the frequency about 50hz when luminous, though be not theoreticly to continue luminously, naked eyes are not aware of.Practical work proves, when the glow frequency of LED reaches 80hz, just do not flashed, and is absolute lasting luminous; If LED is luminous with lower frequency, naked eyes are looked just more dazzling, and these should take into full account in implementation process of the present utility model.

Referring to Fig. 2, shown in the figure oscillating circuit, it is made up of the hysteresis loop comparator and the RC circuit of anti-phase input.The RC loop is both as delay link, again as feedback network, by the automatic conversion that RC fills, () discharge realizes output state.Its voltage-transfer characteristic as shown in Figure 3.

Operation principle:

If a certain moment output voltage u ₀=+U _Z, in-phase input end current potential u then _P=+U _T(+U _TBe Upper threshold voltage).u ₀Pass through R ₃To the capacitor C positive charge, shown in arrow among the figure.Inverting input current potential u _NT increases and raises gradually in time, when t levels off to when infinite u _NBe tending towards+U _Z

In case u _N=+U _T, increase u more slightly ₀Just from+U _ZTransition is-U _Z(U _TBe lower threshold voltage), u meanwhile _PFrom+U _TTransition is-U _TSubsequently, u ₀Pass through R again ₃To the capacitor C discharge, shown in arrow among the figure.

Inverting input current potential u _NT increases and reduces gradually in time, when t levels off to when infinite u _NBe tending towards-U _ZIn case u _N=-U _T, reduce u more slightly ₀Just from-U _ZTransition is+U _Z, meanwhile, u _PFrom-U _TTransition is+U _T, electric capacity begins positive charge again.

Said process goes round and begins again, and circuit has produced self-oscillation.

Dutycycle is meant the ratio of the time that high level is shared, and dutycycle is big more, and the circuit debugging time is just long more, and the brightness of LED is just high more, and synchronous signal lamp power consumption is also big more.Otherwise dutycycle is little, and the brightness of LED is just low, and power consumption is also little.

Because the width difference at crossing, the brightness of required signal lamp are also just different, so the design of circuit should fully take into account the adjustability of dutycycle, the change method of dutycycle: make the forward of electric capacity different with the reverse charging time constant.Utilize the unilateral conduction of the diode different path of can guide current flowing through.

Referring to Fig. 2, the signal of the output of operational amplifier F forms the output signal of square-wave generator after current-limiting resistance R4 current limliting, and this signal is connected to the base stage of power drive triode Q.Resistance R 1, R2 are connected to the input in the same way of operational amplifier F, potentiometer R after with square-wave generator output signal dividing potential drop _WSliding end with potentiometer R _WBe divided into R _W1, R _W2Two parts.R _W1(or R _W2) constituting feedback network with R3, C, the voltage at capacitor C two ends is connected to the reverse input end of operational amplifier F.The circuit working principle:

Work as u ₀=+U _ZThe time, D ₁Conducting, D ₂End u ₀Pass through R _W1, D ₁And R ₃To the capacitor C positive charge, if the equivalent resistance when ignoring diode current flow, then time constant:

τ ₁≈(R _W1+R ₃)C

Work as u ₀=-U _ZThe time, D ₂Conducting, D ₁End u ₀Pass through R _W2, D ₂And R ₃To the capacitor C reverse charging, if the equivalent resistance when ignoring diode current flow, then time constant

τ ₂≈(R _W2+R ₃)C

Utilize the threefactor method of single order RC circuit to solve

${\mathrm{<figure-callout\; id="1"\; label="T"\; filenames="Y200820106029E00072.png"\; state="\{\{state\}\}">T</figure-callout>}}_1\&ap;{\mathrm{\&tau;}}_1\ln (1+\frac{2R_1}{R_2})$

$T_2\&ap;{\mathrm{\&tau;}}_2\ln (1+\frac{2R_1}{R_2})$

$T={\mathrm{<figure-callout\; id="1"\; label="T"\; filenames="Y200820106029E00072.png"\; state="\{\{state\}\}">T</figure-callout>}}_1+T_2\&ap;(R_W+2R_3)C\ln (1+\frac{2R_1}{R_2})$

The sliding end of regulator potentiometer can change dutycycle.

When dutycycle reaches 50%, can economize on electricity 50%,

When dutycycle reaches 60%, can economize on electricity 40%, by that analogy.

Required square wave also can adopt other rectangle wave generation circuit to produce in the utility model.

Claims (2)

1, a kind of low energy consumption solar traffic light, comprise light emitting diode (LED), battery (E) and solar panel (TY) in the formation, it is characterized in that, set up square-wave generator and power drive triode (Q), the collector load of described power drive triode (Q) is a light emitting diode, the base stage of the signal output part control power drive triode of square-wave generator.

2, low energy consumption solar traffic light according to claim 1, it is characterized in that, described square-wave generator is one, and what be made of operational amplifier (F) is the hysteresis loop comparator of feedback network with the RC integrating circuit, between RC integrating circuit and hysteresis loop comparator output potentiometer (R is set _w), the RC integrating circuit meets potentiometer (R through the opposite diode of both direction _w) two ends, potentiometer (R _w) the output of slip termination hysteresis loop comparator.

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