CN2158603Y

CN2158603Y - Telephone set for railway train

Info

Publication number: CN2158603Y
Application number: CN 93228327
Authority: CN
Inventors: 杨林
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-28
Filing date: 1993-05-28
Publication date: 1994-03-09
Anticipated expiration: 2003-05-28

Abstract

The utility model discloses a carrier telephone for a railway train, which comprises an input tuning circuit of 150KHz, a frequency selecting and amplifying circuit of 150KHz, a frequency discriminating circuit of 150KHz, an input and control circuit for a carrier frequency signal of 150KHz, an input tuning circuit of 190KHz, a frequency selecting and amplifying circuit of 190KHz, a frequency discriminating circuit of 190KHz, an input and control circuit for a carrier frequency signal of 190KHz, an audio output and control circuit, a power amplification control circuit, a power amplification circuit, a demoding circuit, a ringing control circuit, a ringing circuit, a coding circuit, a preamplification circuit, a carrier frequency oscillation and modulation circuit, an output and control circuit for a carrier frequency signal, an amplification circuit for a carrier frequency signal, an output tuning circuit of 190KHz, an output tuning circuit of 150KHz. The utility model is characterized in that the utility model can directly utilize a broadcast line or a power cord as a transmission line and don't need to be provided with another transmission line and a small telephone switchboard. Thus, the utility model has the advantages of little investment, extremely easy installation and use.

Description

Telephone set for railway train

The utility model relates to a kind of means of communication, specifically a kind of train special carrier phone.

At present, have only wired broadcasting in the railway car, and do not have telephone communication set.Like this when take place in the car significant events (as steal, robbery with violence etc.) time, crew in the compartment need run or arrive the studio by broadcast ﹠ call train chief and vehicular police by the joint compartment, not only time-consuming but also require great effort, but also because of circulating a notice of untimely or calling out detection and the processing that influences merit.

Since the railway carriage of train be bordering on a big shielded enclosure, make radio telephone be difficult to the means of communication in the competent train.As the line phone is housed had both needed other this numerous and diverse engineering of laying-out, establish the babyphone switching equipment again, thereby investment is bigger.

In view of the foregoing, the purpose of this utility model provides little, the easy to install train special carrier phone of investment.

The purpose of this utility model is achieved in that it comprises the input tuning circuit by 150KHz, the 150KHz selective frequency amplifier circuit, with the 150KHz input channel of 150KHz frequency-discriminating circuit formation with by the 190KHz input tuning circuit, 190KHz selective frequency amplifier circuit and the 190KHz input channel of 190KHz frequency-discriminating circuit formation and the audio frequency output control circuit that links to each other with two input channel outputs, two outputs of this audio frequency output control circuit link to each other with the input of power amplifier and decoding circuit respectively, the output of power amplifier links to each other with ringing loudspeaker with receiver, the output of decoding circuit links to each other with the input of ring control circuit with the CF signal output control circuit, the output control terminal of ring control circuit links to each other with the input of ringing circuit, the output control terminal of the 190KHz CF signal input control circuit that links to each other with selective frequency amplifier circuit one output in the 190KHz input channel and the output of ringing circuit link to each other with the input control end of power amplification control circuit, the output control terminal of power amplification control circuit links to each other with the input of power amplifier, the output of the 150KHz CF signal input control circuit that links to each other with selective frequency amplifier circuit one output in the 150KHz input channel and the output of ringing circuit link to each other with the input control end of power amplification control circuit, the output control terminal of power amplification control circuit links to each other with the input of power amplifier, the output of the 150KHz CF signal input control circuit that links to each other with selective frequency amplifier circuit one output in the 150KHz input channel links to each other with the input control end of decoding circuit, the output of coding circuit and the pre-amplification circuit that is connected with transmitter all links to each other with the input of carrier frequency oscillation and modulation circuit, the output of this carrier frequency oscillation and modulation circuit links to each other through the input of CF signal output control circuit with the CF signal amplifying circuit, the output of CF signal amplifying circuit links to each other with the input of 190KHz output tuning circuit with 150KHz output tuning circuit, and the input of above-mentioned two input channels all links to each other with broadcasting for train circuit or power circuit with the output of two output tuning circuits.When incoming call, signal inputs to the audio frequency output control circuit through the 150KHz input channel, decode by decoding circuit then, deliver to the ring control circuit, through ringing circuit, power amplification control circuit, power amplifier makes ringing loudspeaker send ringing tone, when mentioning phone, ringing tone stops, the other side's sound sends from receiver, sends into carrier frequency oscillation and modulation circuit from square sound by the pre-amplification circuit that connects transmitter, then through CF signal output control circuit control output 190KHz CF signal, this CF signal is amplified after 190KHz output tuning circuit is exported and delivered to the other side's phone; When making a phone call outward, at first import the other side's phone code clerk by coding circuit, this code clerk information is delivered to carrier oscillation and modulation circuit, and through the CF signal of CF signal output control circuit control output 150KHz, after this CF signal is amplified, deliver to the other side's phone through 150KHz output tuning circuit.

The utility model has the advantages that: can directly utilize broadcast wire on the train or power line as transmission line, need not to establish in addition again transmission line and small branch exchange, thereby invest little, install, use extremely convenient.For improving the train communication situation, safeguarding that the public security on the train plays an important role.

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

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is the utility model circuit theory diagrams.

With reference to the accompanying drawings, the utility model comprises the 150KHz input tuning circuit, 150KHz selective frequency amplifier circuit 2,150KHz frequency-discriminating circuit 3,150KHz CF signal input control circuit 11,190KHz input tuning circuit 4,190KHz selective frequency amplifier circuit 5,190KHz frequency-discriminating circuit 6,190KHz CF signal input control circuit 12, audio frequency output control circuit 7, power amplification control circuit 8, power amplifier 9, decoding circuit 10, ring control circuit 13, ringing circuit 14, coding circuit 15, pre-amplification circuit 16, carrier frequency oscillation and modulation circuit 17, CF signal output control circuit 18, CF signal amplifying circuit 19,190KHz exports tuning circuit 20,150KHz exports tuning circuit 21.Wherein 150KHz input tuning circuit 1 is made up of relay J 1 normally-closed contact J1-2 and transformer B2, capacitor C 14, C15, as connection program circuit A, when there is signal at the B two ends, through transformer B2 coupling input, B2, C14 resonance are in 150KHz, and resonance signal is given frequency selective amplifier 2 by capacitor C 15 couplings;

Frequency selective amplifier 2 mainly is made of a among the hex inverter IC6, b, three inverters of c and capacitor C 16-C21, resistance R 19-R21, diode T3, T4, transformer B3, inductance L 1.T3, T4 are limiter diode, and capacitor C 16 and inductance L 1 are formed the 190KHz filter, and elimination 190KHz signal prevents to hear own voice.First order amplifier is made up of inverter a and R19, signal after the amplification is given transformer B3 by capacitor C 17 couplings, carry out the 150KHz frequency-selecting by capacitor C 18 and transformer B3, frequency-selecting is after the second level amplifier of being made up of inverter b and resistance R 20 is given in transformer B3 and capacitor C 19 couplings.The second level is amplified the back and is given the third level amplifier of being made up of inverter c and resistance R 21 by capacitor C 20 couplings, and the third level is amplified the back and gives frequency-discriminating circuit 3 by capacitor C 21 couplings.

Frequency-discriminating circuit 3 is made of capacitor C 22-C24, resistance R 22, R23, inductance L 2, diode T5, T6, can access audio signal through this circuit, and this audio signal inputs to audio signal output control circuit 7.

Audio frequency output control circuit 7 is by analog switching ic IC7(CD4053), resistance R 29-R31 and capacitor C 36 constitute.When 150KHz CF signal input control circuit 11 output control signals, telephone handle is not picked up, and then hook switch K1-K3 is connected to the M point, and this moment, analog switch IC7 was imported by 12 pins, the output of 2 pin, promptly audio frequency output control signal directly inputs to decoding circuit 10.Telephone handle is picked up hook switch K1-K3 and is connected to the N point, and this moment, analog switch IC7 was imported by 13 pin, the output of 1 pin, and promptly audio frequency output control signal inputs to power amplifier 9 ₁The sound of receiver Y2 uppick the other side by connecting power amplifier 9.When dialing the number outward, 150KHz CF signal input control circuit 11 does not have control signal output, and this moment, 1 pin was exported because telephone handle is picked up, and K1-K3 is connected to the N point, and analog switch IC7 imports from 13 pin.

150KHz CF signal input control circuit 11 is by capacitor C 47, C48, diode T14, T15, T20, resistance R 38-R40, triode T16, T23 and trigger IC12(CD4583) in four trigger i, j, k, k form, the output of the second level amplifier in its input and the selective frequency amplifier circuit 2 links to each other.When the 150KHz input channel has the signal input, diode T14, T15 detect the positive potential signal, triode T16 conducting, its collector electrode output negative potential goes to control latched flip flop IC11 in the decoding circuit 10 and the output of audio signal controller IC7 to trigger i, j and diode T20, removes analog switch IC4 in control relay J1 and carrier frequency oscillation and the modulation circuit 17 through trigger R, L and triode T23 again.

Decoding circuit 10 is by double-tone frequency decoder IC9, decimal decoder IC10 and latched flip flop IC11, peripheral cells such as triode T13 constitute, audio coding signal is by the 2 pin output of analog switch IC7 after the frequency discrimination, give double-tone decoder IC9 frequently through capacitor C 38 and resistance R 34 couplings, solve 8421 yards, this sign indicating number solves the 0-9 10-bit digit by decimal decoder IC10, this decoding circuit adopts 1-9 nine figure place sign indicating numbers, three input (I of this nine figure places sign indicating number and latched flip flop IC11, II, III) forms three item sign indicating numbers, connect 3 as I, II connects 6, III connects at 9 o'clock, the number of this machine is exactly 369, I, II, after III receives triggering signal successively, the 1 pin output negative potential of latched flip flop IC11, triode T13 ends, its collector electrode output positive potential, one the tunnel goes to control ring control circuit of being made up of analog switch IC14 etc. 13 and the power amplification control circuit of being made up of IC15 8, and the CF signal output control circuit of being made up of analog switch IC5 18 is removed to control in another road.

Ringing circuit 14 is by IC13(CD4069) etc. peripheral element constitute.The ringing tone signal is input to by IC8(LM386 by power amplification control circuit 8) power amplifier 9 that constitutes amplifies, amplifies the back and sends ringing tone by loud speaker Y1.After the tinkle of bells rings, pick up telephone handle, hook switch K1-K3 is connected to the N point, and ringing circuit quits work.Audio signal is delivered to power amplifier 9 by the 1 pin output of analog switch IC7, and Y2 sounds by receiver.

Pre-amplification circuit 16 is made of amplifier IC2.Transmitter MIC in the telephone handle picks up voice after this pre-amplification circuit amplifies, voice signal after the amplification is input in the carrier frequency oscillation be made up of tone decoder IC3 and analog switch IC4 and the modulation circuit 17 and modulates, it is 150KHz that adjusting W1 makes frequency of oscillation, and it is 190KHz that adjusting W2 makes frequency of oscillation.After amplifying, the carrier frequency amplifying circuit 19 that the carrier frequency modulation signal is formed via triode T1, T2 sends into 190KHz output tuning circuit of forming by capacitor C 12 and transformer B1 20 and the 150KHz output tuning circuit of forming by capacitor C 13 and transformer B1 21.

Coding circuit 15 is by double audio coding device IC1(MK5087), crystal JT1 and 3 * 4 keyboards form.The double audio coding signal is delivered to carrier frequency oscillation and modulation circuit 17 by the 16 pin output of IC1, then via 21 outputs of 150KHz output tuning circuit.

190KHz CF signal input control circuit 12 is made up of two trigger g, h among the trigger IC12 and diode T17, T18, triode T19, the control signal of slave flipflop h output stops ringing circuit 13 generation dialing tones, power amplifier is started working simultaneously, has promptly finished the whole process of number dialing telephone call.

Input tuning circuit 4 in the 190KHz input channel, selective frequency amplifier circuit 5, frequency-discriminating circuit 6 respectively with the 150KHz input channel in input tuning circuit 1, selective frequency amplifier circuit 2, frequency-discriminating circuit 3 structures are identical, principle is identical, so no longer describe.

Claims

1, a kind of train special carrier phone, it is characterized in that: it comprises the 150KHz input channel that is made of 150Hz input tuning circuit 150KHz selective frequency amplifier circuit and 150KHz frequency-discriminating circuit and by the 190KHz input tuning circuit, 190KHz selective frequency amplifier circuit and the 190KHz input channel of 190KHz frequency-discriminating circuit formation and the audio frequency output control circuit that links to each other with two input channel outputs, two outputs of this audio frequency output control circuit link to each other with the input of power amplifier and decoding circuit respectively, the output of power amplifier links to each other with ringing loudspeaker with receiver, the output of decoding circuit links to each other with the input of ring control circuit with the CF signal output control circuit, the output control terminal of ring control circuit links to each other with the input of ringing circuit, the output control terminal of the 190KHz CF signal input control circuit that links to each other with selective frequency amplifier circuit one output in the 190KHz input channel and the output of ringing circuit link to each other with the input control end of power amplification control circuit, the output control terminal of power amplification control circuit links to each other with the input of power amplifier, the output of the 150KHz CF signal input control circuit that links to each other with selective frequency amplifier circuit one output in the 150KHz input channel links to each other with the input control end of decoding circuit, the output of coding circuit and the pre-amplification circuit that is connected with transmitter all links to each other with the input of carrier frequency oscillation and modulation circuit, the output of this carrier frequency oscillation and modulation circuit links to each other through the input of CF signal output control circuit with the CF signal amplifying circuit, the output of CF signal amplifying circuit links to each other with the input of 190KHz output tuning circuit with 150KHz output tuning circuit, and the input of above-mentioned two input channels all links to each other with broadcasting for train circuit or power circuit with the output of two output tuning circuits.