CN87202376U - Common system for remote-controlled public-addiess and telephone - Google Patents

Abstract

The utility model is used for the signal transmission of wire broadcasting, in particular for the signal transmission of remote broadcasting. The existing wire broadcasting system adopts a direct power transmission system with big transmission loss, inefficiency and difficult remote transmission. The utility model adopts the broadcast speech signal to superposition on the direct current voltage to modulate and makes use of the external telephone line transmitting method to achieve the remote transmission and control. The utility model has the advantages of simple machinery room equipment, noninterference to the telephone signal, free of erecting special purpose broadcast external line and convenient assemblage of broadcasting network, etc.

Description

Common system for remote-controlled public-addiess and telephone

Wired remote control broadcasting and phone sharing system, but be the broadcast system of long-distance transmissions broadcast singal.Belong to the wired broadcasting field.

Traditional wired broadcast system, the direct transmission system (see figure 1) of power is adopted in the transmission of broadcast singal, studio station (1) is with the speech signal Control Allocation, change the voltage broadcast singal into, power amplifier cabinet (2) is amplified to rated value with signal again, boosts to certain high pressure (120V or 240V) by transformer (3), transmits through outside line (4), by the line transformer coupling, promote loud speaker (6) work.This system, the calculator room equipment complexity, loss is big, and efficient is low, the long-distance transmissions difficulty.Common phone, broadcasting sharing system be telephone signal utilization broadcasting outside line transmission, and broadcast singal can not be utilized the outside line transmission, and there is the shortcoming of the serious interfering phone signal of broadcast singal in it.Old-fashioned phone, the shared remote control system (see figure 2) of broadcasting, it remains the outside line of phone common broadcast, on the circuit of high power transmission, by people's (K) switching controls that operates a switch, because remote control switch (J) internal resistance restriction, can only be shared with old-fashioned common battery type or local battery switchboard (7), telephone (8), can't be used with the automatic telephone circuit.

Task of the present utility model is a kind of broadcast signal transmission system that is different from traditional approach of design, solve the remote transmission problem of broadcast singal, simplify the studio station calculator room equipment, can shared automatic telephone outside line, realize broadcasting, phone is shared and remote unmannedly control automatically.

This new broadcast signal transmission system is that the broadcasting language signal is superimposed upon modulation transmissions on the direct voltage, in use side demodulation, power amplification, finishes broadcast singal transmission and realizes.It is made up of studio station (1), the modulating stage (A) that is arranged on studio station (1) end, outside line (4), remote control enlarger (B) and the loud speaker (6) that loop resistance is not more than 2 kilohms (Fig. 3).Broadcasting, phone sharing system are the shared outside line transmission of broadcast singal.Modulating stage (A) is made up of control switch (11), modulation DC power supply (12), modulator (13) and diverter switch (14).When working for broadcast system, start control switch (11) and connect modulation DC power supply (12), the voltage broadcast singal coupling of studio station being carried by modulator (13) is superimposed upon on the direct voltage modulates, diverter switch (14) is cut off telephone exchange (9) circuit automatically simultaneously, and modulation broadcast circuit and outside line (4) circuit is connected.Remote control enlarger (B) is made up of identification switch (15), demodulator (16), amplifier power supply (17) and power amplifier (18).Identification switch (15) is differentiated the voltage signal that outside line (4) transmission comes, when come by outside line (4) transmission be modulated broadcast signal the time, identification switch (15) cuts off the circuit that leads to telephone (10) automatically, connect broadcasting power amplifier voltage (17), modulated broadcast signal is by demodulator (16) demodulation, revert to the voltage broadcast singal, amplify, drive loud speaker (6) work through power amplifier (18).When going off the air, disconnect control switch (11), it is unimpeded that broadcasting, phone sharing system revert to telephone line automatically, and program circuit is an off-state.

When outside line (4) is that dedicated broadcast outside line or idle telephone line are when doing special-purpose outside line, the wired remote control broadcast system can save diverter switch (14), identification switch (15), only the break-make with simple relay control amplifier power supply (17) gets final product, and can simplify control circuit greatly like this.

As required, modulating stage (A) and outside line (4) can the multichannel settings, and control or control together separately form radio network; Also can be at same outside line use side, multichannel is provided with remote control enlarger (B) and constitutes network; Also can utilize remote control enlarger (B) as terminal, make broadcast singal be sent to farther place.

Compare with existing broadcast system or telephone-broadcast sharing system, broadcasting call sharing system of the present utility model, owing to adopted the system that broadcast singal is superimposed upon modulation transmissions on the direct voltage, calculator room equipment is simple, do not need huge, expensive power amplifier cabinet, as long as studio station has 3～5 watts power output, for example studio station is with a multi-functional radio-cassette player, but with regard to operate as normal, 60～100 volts of voltages, 08 volt of following broadcast singal of stack, when the outside line loop resistance is not more than 2 kilohms, but with regard to 15～20 kilometers of normal transmission.This broadcasting call sharing system utilizes outside line to carry out the transmission of broadcast singal, needn't set up the dedicated broadcast outside line, and in telephone cable, modulated broadcast signal can not produce the telephone signal in other circuit and disturb.At use side, power supply can be with civil power or other power supply, since from studio station can the remote control use side work, thereby use side can be fitted together remote control enlarger, set of speakers, constitutes the remote control sound column, be installed on open-air, roof or the electric pole, realize the unmanned, use side can combination in any, and is extending transversely, increase user or user power, constitute the remote control radio network.

Fig. 1, traditional wired broadcasting circuit.

Fig. 2, the old-fashioned shared remote control system of telephone-broadcast.

Fig. 3, wired remote control broadcasting and phone sharing system block diagram.

Fig. 4, wired remote control broadcasting and phone sharing system circuit.

Fig. 5, identification switch circuit.

Fig. 6, special-purpose outside line remote control broadcast system circuit.

Fig. 7, modulating stage multi-channel network circuit.

Fig. 8, remote control enlarger multi-channel network circuit.

Fig. 9, remote control enlarger transfer relay circuit.

Accompanyingdrawing 4～9 has been represented several specific embodiment of the present utility model:

As shown in Figure 4 wired remote control broadcasting and phone sharing system are when switch (11) (control switch) is closed, by transformer B₁, bridge rectifier D₁, commutation capacitor C₁, C^'₁With dead resistance R₁The modulating stage DC power supply of forming is switched on transformer B₂(modulator) is coupled to secondary being superimposed upon and transformer B with the broadcasting voltage signal of studio station (1) output₂On the secondary current/voltage that joins, form modulated broadcast signal, direct voltage makes relay J simultaneously₁(diverter switch) work, contact J_1-1, J_1-2Action, the circuit of cut-out dial exchange (9) makes transformer B₂Secondary wire and outside line (4) connect, modulated broadcast signal transmits to use side by outside line (4).At use side, the modulated broadcast signal that comes from outside line (4) transmission makes identification switch (15) work, normally closed contact J_2-1J_2-2Telephone (10) circuit, normal opened contact J are cut off in action_2-3, J_2-4The closed connection by transformer B₃, bridge rectifier D₂, commutation capacitor C₂, C^'₂The amplifier power supply of forming is power amplifier (18) power supply, and modulated broadcast signal reverts to broadcast singal, transformer B by the demodulation of capacitor C stopping direct current simultaneously₄Coupling is amplified signal by power amplifier (18), drives loud speaker (6) work, finishes the transmission broadcast of omnidistance wired broadcasting.

Identification switch as shown in Figure 5 (15) is by at emitter, base stage, the collector electrode forward high back-pressure diode D that connects respectively₃, D₄, D₅, at base stage series connection proper resistor R₂, at collector electrode series relay J also₂Switching tube (or Darlington combination switch pipe) G bipolar rete winding thread road constitute.In circuit, when the power supply forward was connected on identification switch (15) two ends, it was low-resistance conducting, relay J₂Work; When reversal of power was connected on the identification switch (15), it was high resistant by (can reach more than 50 kilohms), relay J₂Do not work.Because characteristic like this, thereby in circuit, identification switch (15) can play recognition reaction.To shown in the polarity of outside line (4) power supply, it can make the conducting of identification switch (15) forward low-resistance as Fig. 4 modulation power source (12), and identifying is broadcast system work, relay J₂Conducting, contact J_2-1, J_2-2Cut off telephone (10) circuit, J_2-3, J_2-4Connect amplifier power supply; When broadcast system quit work, dial exchange (9) power supply polarity made identification switch (15) be in reverse high resistant cut-off state, relay J₂Do not work J_2-1, J_2-2Still be in normally off, telephone (10) circuit is unimpeded, J_2-3, J_2-4Be in normally open, the amplifier power supply power supply is obstructed, and it does not impact the shunting of work to telephone (10).When therefore broadcast system was not worked, telephone line was unimpeded.

Wired remote control broadcast system as shown in Figure 6, compare with the phone sharing system with wired remote control broadcasting shown in Figure 4, when outside line (4) is dedicated broadcast outside line (being that special-purpose outside line of broadcasting or outside line do broadcasting outside line on the shelf are used), can be without diverter switch (4) (relay J₂), identification switch (15) is directly used J₂Just replace can, control circuit is simplified greatly, and the course of work is identical with figure (4).

Modulating stage multi-channel network circuit as shown in Figure 7, transformer B₂(modulator) or transformer B₂Secondary can the multichannel setting, be equipped with a plurality of diverter switch (J simultaneously₁), just can realize modulating stage (A) multiplexing network system.

Remote control enlarger multi-channel network circuit as shown in Figure 8, relay J₂(or identification switch (15)) capacitor C, transformer B₄, multichannel setting simultaneously such as amplifier power supply (17) and power amplifier (18), just can realize remote control enlarger multiplexing network system, drive loud speaker (6) and work available various different modes.

Remote control enlarger transfer relay circuit as shown in Figure 9 takes out the voltage signal of certain amplitude from transfer use side power amplifier prime, by transformer B₂(modulator) coupling, modulation transmits once more by outside line (4 ') once more, to realize the broadcast singal transmission of farther distance.

Claims (5)

1, wired remote control broadcasting and phone sharing system, form by the telephone system that the broadcast system that comprises studio station, loud speaker and dial exchange, outside line, telephone constitute, it is characterized in that: the hop of broadcast singal, the outside line that is not more than 2 kilohms by the modulating stage that is arranged on the studio station end, away from the remote control enlarger and the ring value of studio station is formed, and modulating stage and outside line or remote control enlarger also can be that two-way constitutes network at least.

2, according to the system of claim 1, it is characterized in that: the modulating stage of studio station end is by the control switch that makes broadcast system work, the modulation DC power supply, cuts off the diverter switch composition that telephone exchange machine circuit, modulation broadcast circuit are connected with outside line automatically when the broadcasting language signal is superimposed upon modulator on the direct voltage and broadcast system work automatically.

3, according to the system of claim 1 or 2, it is characterized in that: when being broadcast singal by the voltage signal that comes when the outside line transmission, can cutting off telephone circuit, the identification switch of connecting the broadcasting amplifier power supply, the demodulator that makes the modulated broadcast signal demodulation, amplifier power supply, power amplifier and form away from the remote control enlarger of studio station.

4, system according to claim 3 is characterized in that: identification switch is switching tube (or Darlington combination switch pipe) that contains NPN and the relay formation of connecting at collector circuit.

5, system according to claim 4 is characterized in that: forward at least one high-voltage diode of connecting respectively on the emitter of switching tube, base stage, collector electrode, and constitute two-terminal network at the connect resistance of suitable resistance of base circuit.

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