CN2081752U

CN2081752U - Servo controller for colour lamps and music

Info

Publication number: CN2081752U
Application number: CN 90224103
Authority: CN
Inventors: 邓忠裕; 龚琼华
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-11-23
Filing date: 1990-11-23
Publication date: 1991-07-31

Abstract

The utility model relates to a servo controller for color lamps and music, which is used for stages, song and dance halls, etc. The servo controller for color lamps and music comprises a frequency selection combining circuit, a rectification circuit, a pulse and phase detecting generating circuit, a synchronizing signal circuit, a main control circuit, etc. An audio signal is changed into an AC voltage which is in direct proportion to the audio signal; the ac voltage of the changing acts on a color lamps, achieving the coincidence of the degree of the brightness of light, and the audio signal, which is good for duration of vision, generating recreative effect of video and audio integration.

Description

Servo controller for colour lamps and music

The utility model relates to the light control that a kind of stage is used.

The color light control of existing stage, song and dance platform, most employing programme-control, the master control device does not all break away from relay, contactor etc., is subjected to the influence of mode and device, and the color lamp flicker is just according to change of program, and the power that can't follow music signal changes.Chinese patent bulletin GG89210951.3＜music seven-color LED〉and open GK86102959A＜rotary decorative lamps of music control〉propose a kind of sound control color lamp system that is made up of power supply, music control circuit, electronic switch, color lamp, it mainly selects high, medium and low frequency signal by frequency-selective amplifier, directly controls the light action of different color.The color lamp of Chan Shenging still can not be consistent with audio signal like this, just audio signal frequency is divided into several sections, remove to control the lamp of different color again by each frequency band, as controlling green light by high-frequency signal control red colored lamp, intermediate-freuqncy signal control blue light, low frequency signal, in fact these signal controlling are still a kind of on off state, and color lamp changes the power that can not accurately reflect audio signal.

The purpose of this utility model is at above-mentioned weak point, proposes a kind of light reaction and the synchronous fancy lanterns music servo controller of music.This servo controller is varied to audio signal the alternating voltage that is directly proportional with this signal, alternating voltage by this variation acts on color lamp, the power that realizes light is strong and weak consistent with audio signal, utilizes the effect that persists of people's vision, produces a kind of human eye to light reaction and the synchronous sensation of music.

The utility model is made up of isolating transformer, frequency-selecting combiner circuit, active rectifying circuit, pulse and phase demodulation generation circuit, synchronizing signal and working power circuit, governor circuit etc.The frequency-selecting combiner circuit is logical by high pass, band, low pass circuit is formed.Audio signal is sent into frequency selection circuit through isolating transformer, and selected suitable RC parameter is to the audio signal do decay in various degree of input, synthetic one control signal of selecting.Audio signal after the frequency-selecting produces a DC voltage with the audio signal variation through precision rectifying, control DC pulse generation circuit.Synchronous circuit provides the power supply of impulse circuit on the one hand, determines the starting point of C5 charging on the one hand.Select the circuit parameter＜RC〉of suitable phase discriminator, making time parameter is 0.01S, and control impuls takes place and pulse generating time.The pulse signal of output is through the ON time of power amplification control great power bidirectional controllable silicon SCR, master control export an alternating voltage that changes with music signal, this voltage is put on color lamp, and color lamp just changes with the power of music signal, reaches the appreciation effect of looking, listening one.If use many servo controllers, every servo controller is all selected the audio signal of a certain frequency range, and load is connected to the lamp of one group of color, can obtain effect colorful, whole of audiovisual during actual the use.

The alternating voltage that changes with music signal of this device output also can be used as the equipment that changes with music signal or the power source of system, and as music fountain, sound control waterfall, its power output is by main control loop, the decision of great power bidirectional silicon controlled parameter.

The present invention compared with prior art has very big advantage, and the color lamp pace of change of this servo controller control is fast, and trace performance is good; The power of the strong and weak directly reaction of light music signal, control power is big, and the efficient height can be used for different occasions.

Now the utility model is described in further detail with reference to the accompanying drawings:

Fig. 1 is the utility model circuit block diagram.

Fig. 2 is the utility model circuit diagram.

The working condition of the utility model embodiment is described below in conjunction with Fig. 2.

Audio signal is through isolating transformer B1 input frequency-selecting combiner circuit, and R1, C1, WR1, R2 form low pass filter in the frequency-selecting combiner circuit, and its parameter is selected to make that high-end cut-off frequency is 400HZ; R3, C2, C3, WR2, R4 form bandpass filter, and its low, high-end cut-off frequency is set at 400HZ and 3000HZ respectively; C4, WR3, R5 form high-pass filter, and its cut-off frequency is set at 3000HZ.Audio signal can be synthesized a specific sound control signal at the E point so that the audio signal of each frequency range obtains decay in various degree then by regulating WR1, WR2 and WR3 when frequency selection circuit.This signal is delivered to the accurate active rectifying circuit of being made up of IC1 etc. through R6 and is carried out rectification, when audio signal is negative value, IC1 exports positive voltage, and D2 conducting output is because the effect of feedback resistance R7, make the amplitude of output be proportional to the amplitude of input signal, when audio signal is timing, IC1 exports negative voltage, and D2 ends, the D1 conducting and with input signal shunting reducing the influence of positive signal to output, so rectification output is the halfwave rectifier signal of audio signal.R8, R9, WR4 are used for adjusting the IC1 dc point, when input signal is zero, adjust WR4 and make IC1 output DC potential reach+1.2V about, with forward voltage drop that reduces D2 and the control dead band that the initial operating point of BG1 exists the audio frequency small-signal.IC1 adopts general operational amplifier, uses MP741 here.Audio signal after the rectification forms phase discrimination signal through C filtering, and delivers to the BG1 base stage by R10, and the parameter of R10C is selected to make that time constant is 0.01S.Phase discrimination signal is by BG1 and then control the charging voltage size of BG2 to capacitor C 5.When the C5 both end voltage rises to by BG3, R13, the determined partial pressure value of R14, produce a trigger impulse by BG3 by R14, isolate output through the BG4 amplification and through B3 again.BG1 adopts NPN type triode＜9014 〉, BG2 to adopt positive-negative-positive triode＜9015 〉, and BG3 adopts unijunction transistor BT35, and BG4 adopts NPN type triode (8050).The starting point of C5 charging determined by synchronizing voltage, synchronizing voltage by alternating voltage through DZ ₁Bridge rectifier and through R16, DW voltage stabilizing slicing, its waveform is

(DW selects the Zener diode of 24V, 80mA for use).This synchronizing voltage is the working power of double as pulse generation and amplifier section also, electric capacity restarts to charge and reaches when utilizing alternating current to be zero in fact synchronously at every turn, because each alternating current is reduced in the zero process, by the determined partial pressure value of BG3 also step-down thereupon, when being lower than the voltage that electric capacity fills, immediately electric capacity is discharged, so capacitor C 5 all was to begin charging on same basis when each half-wave of alternating current began, and the charging speed depends on phase discrimination signal, promptly depend on audio signal, the speed of charging directly affects the moment of pulse generation, that is controlling the angle of flow of main control part bidirectional triode thyristor SCR, so output voltage is subjected to the control of audio signal.Triggering signal is added to by R15 between the control utmost point G and negative electrode K of silicon controlled main rectifier, just can obtain the alternating voltage that virtual value changes with audio signal according to the figure wiring.Select the bidirectional triode thyristor of different parameters, can obtain different control power.Synchronizing signal and working power circuit produce ± and the 12V power supply is intended for the IC1 working power, it by alternating voltage through the DE2 bridge rectifier, C6, C7 filtering, through the constant ± 12V voltage of three-terminal voltage-stabilizing integrated package 7812,7912 outputs, C8, C9 do further filtering and use again.

Claims

1, a kind of fancy lanterns music servo controller, it is characterized in that servo controller is by the frequency-selecting combiner circuit, active rectifying circuit, synchronizing signal and working power circuit, pulse and phase demodulation generation circuit, pulse amplifying circuit and master control output circuit are formed, audio signal is sent into the frequency-selecting combiner circuit by isolating transformer B4, audio signal after the frequency-selecting produces a DC voltage with the audio signal variation through active rectifying circuit, this DC voltage is sent into pulse and phase demodulation generation circuit, the generation and the pulse generating time of control DC pulse, export a start pulse signal and isolate output through power amplification (BG4 amplification) and by B3, the ON time of control great power bidirectional controllable silicon SCR, master control output can obtain an alternating voltage with the audio signal variation.

2, color lamp servo controller according to claim 1 is characterized in that the structure and the R of pulse and phase discriminator ₁₀The C parameter selects to make the phase place that pulse produces can 0-180 ° of variation in per half cycle of AC power with the variation of audio signal, R ₁₀The C parameter was got 0.01 second.

3, color lamp servo controller according to claim 1 is characterized in that active rectifying circuit has adopted R8, R9, WR4 to regulate IC1＜model MP741〉dc point, to eliminate the initial operating point of BG1 to the existing control of audio frequency small-signal dead band.

4, color lamp servo controller according to claim 1 is characterized in that the alternating voltage with the audio signal variation of main control part output can be used as the power source of equipment such as music fountain, sound control waterfall.