CN2917117Y - Dual-audio reference time transmission receiver - Google Patents

Abstract

A two-tone standard time receiver is provided, which comprises a SCM computer system, a clock circuit and a two-tone communication circuit connected with the SCM computer system, an amplifying circuit connected with the two-tone communication circuit, a hang-on/up circuit with the input terminal connected with the SCM computer system and tow-tone dual communication circuit, and a serial output circuit with the input terminal connected with the SCM computer system. The utility model adopts two-tone signals of the public telephone network, and utilizes 12 keys, such as the star symbol and a symbol like the Chinese character ''jing'', and other 10 number keys or their combinations to dial phone numbers, thus compiling ASCII character information, fulfilling control over the controlled objects and transmit standard time. Therefore, the receiver overcomes defect of telephone time. Besides, the time output terminal can synchronize time of other equipments. The utility model has the advantages of rational design, simple structure, small size, lower production cost and easy operation and is applicable to technical fields, such as seismic network, hydrological monitoring, electric power, communication and traffic control.

Description

The accurate time transfer receiver of double-tone frequency marking

Technical field

The utility model belongs to electronic measuring technology field, is specifically related to the accurate time transfer receiver of double-tone frequency marking.

Background technology

Along with the development of computer technology and telecommunications industry, more and more common by the telecommunication that telephone wire carries out.People adopt modulator-demodulator to communicate usually, but a kind of dual-tone multifrequency communication mode can be considered in little in amount of communication data, not high to required communication rate application scenario.Standard as push-button telephone is worked out and recommended to dual-tone multifrequency (be called for short double-tone frequently) signal by CCITT, be widely used in dialing at present.Double-audio signal is formed by two kinds of combination of frequencies, and each double-audio signal is made up of a low frequency signal and a high-frequency signal, can produce 16 kinds of signals altogether, represents 0～9 respectively, *, # etc.

Characteristics such as antijamming capability is strong because the dual-tone multifrequency double-audio signal has, long transmission distance, data are accurate, thereby can be widely used in technical fields such as communication, remote control.Utilize double-audio signal can realize the remote microcomputer communication of dual bus, to finish the transmission of control or data.Adopting DTMF Technology is to realize the software and hardware key technology of telecommunication, and its circuit has realizes simple, low, the high reliability features of cost.Cooperate with related software and can realize that also bi-directional call communicates by letter, correct identification conversation with function such as communicate by letter, applicable to multiple telecommunication occasion, have application value preferably.

At present, the telephone time service system is to be a kind of standard time transmission technology of carrier with the public telephone network.Its major technique characteristics adopt modulator-demodulator to combine with single-chip microcomputer, realize the transmission of standard time information, and synchronization accuracy is better than 5 milliseconds.Advantage is that the information of control is very complicated and abundant.Major defect: must be at master station and each built-in dedicated modem of user, expense is higher, and communication once needs 40 seconds, the waste line resource.If directly use the online double-audio signal of public telephone (*, # and 10 numeric keys, totally ten two keys, generally doing dialing uses) or its combination, realize that the transmission (these combinations are weaved into the ASCII character character information and can be realized long-range Be Controlled side is effectively controlled) of standard time can remedy the shortcoming of telephone time service.User's set based on double-tone standard time transmission technology development frequently, not only volume is little, simple to operate, and convenient and reliable, expense is cheap, can satisfy medium accuracy time user's demand, can be industries such as scientific research, seismic network, hydrologic monitoring, electric power, communication, traffic administration the standard time synchronous service is provided.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the shortcoming of above-mentioned telephone time service system, and a kind of reasonable in design, simple in structure, volume is little, product cost is low, simple to operate accurate time transfer receiver of double-tone frequency marking is provided.

Solving the problems of the technologies described above the technical scheme that is adopted is that it comprises: be used for microcontroller system that complete machine is controlled; Clock circuit, this circuit is connected with microcontroller system; Double-tone is telecommunication circuit frequently, and this circuit is connected with microcontroller system; Amplifying circuit, this circuit is connected with double-tone frequency telecommunication circuit; It comprises plucks/the on-hook circuit, the input order sheet department of computer science of this circuit double-tone telecommunication circuit frequently of unifying; It also comprises the serial output circuit, the input order sheet computer system of this circuit.

The utility model adopts the online double-audio signal of public telephone, with *, # and 10 numeric keys, totally ten two keys or its combination, doing dialing uses, the ASCII character character information is weaved in combination, has realized long-range Be Controlled side is controlled and the transmission of standard time effectively, has overcome the shortcoming of telephone time service, time output port of the present utility model can realize other is required the synchronous requirement of time synchronism equipment.Because it is low that it has a volume tip, can be integrated in telephone set or the miscellaneous equipment.The utlity model has reasonable in design, simple in structure, volume is little, product cost is low, simple operation and other advantages, can promote the use of in technical fields such as seismic network, hydrologic monitoring, electric power, communication, traffic administrations.

Description of drawings

Fig. 1 is an electrical principle block diagram of the present utility model.

Fig. 2 is the electronic circuit schematic diagram of an embodiment of the utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.

Fig. 1 is an electrical principle block diagram of the present utility model, referring to Fig. 1.In Fig. 1, the utility model be by clock circuit, microcontroller system, double-tone frequently telecommunication circuit, amplifying circuit, pluck/the on-hook circuit, the serial output circuit connects and composes.Clock circuit is connected with microcontroller system, microcontroller system is connected with double-tone frequency telecommunication circuit, double-tone frequently telecommunication circuit is connected with amplifying circuit, and the input order sheet computer system of serial output circuit is plucked/the input order sheet computer system of on-hook circuit.

In Fig. 2, the clock circuit of present embodiment is connected and composed by integrated circuit U3, diode D1, R2, C4～C7, socket JI, crystal oscillator Y2, and the model of integrated circuit U3 is DS1302.The 100KHz frequency signal is from socket JI input, and 1 pin of socket JI connects the end of C4～C6 and connects the anodal of diode D1 and connect 5V positive source, 2 pin ground connection, the minus earth of the other end of C4～C6 and diode D1 by R2.Two ends, 5～7 pin order sheet computer systems, 8 pin that an end, 2 pin and 3 pin that 1 pin of integrated circuit U3 meets 5V positive source and C7 meet crystal oscillator Y2 respectively connect 3V power supply, 4 pin ground connection, the other end ground connection of C7.

The microcontroller system of present embodiment is connected and composed by integrated circuit U1, R1, R18～R25, C1～C3, C8, crystal oscillator Y1, socket J3, and the model of integrated circuit U3 is AT89C32.21 pin of integrated circuit U3 connect 7 pin of integrated circuit U2,22 pin connect 6 pin of integrated circuit U3,23 pin connect 5 pin of integrated circuit U3,32～39 pin connect 14～7 pin of 5V positive source and socket J3 respectively by R18～R25,24 pin connect and pluck/the on-hook circuit, 6 pin of 25 pin combination hub J3,26 pin and 28 pin connect double-tone communicating circuit frequently, 4 pin of 27 pin combination hub J3 and double-tone be communicating circuit frequently, 9 pin connect the end of C1 and pass through R1 ground connection, 10 pin and 11 pin connect the serial output circuit, 15 pin connect double-tone communicating circuit frequently, 18 and 19 pin of integrated circuit U1 meet crystal oscillator Y1, C2, the oscillating circuit that C3 connects, another termination 5V positive source of C1.Another termination 5V positive source of R26～R33.7～10 pin of socket J3 connect double-tone, and frequently communicating circuit, 2 pin connect the end of C8 and 5V positive source, 1 pin and 3 pin and 15 pin ground connection, 16 pin connect the 5V positive source, the other end ground connection of C8, and socket J3 connects display.

The double-tone of present embodiment communicating circuit is is frequently connected and composed by integrated circuit U2, R3～R7, R17, C13～C16, crystal oscillator Y3, and the model of integrated circuit U2 is MT8888.9 pin of integrated circuit U2 connect 28 pin of integrated circuit U1,11 pin connect 27 pin of integrated circuit U1,12 pin connect 26 pin of integrated circuit U1,13 pin connect 15 pin of integrated circuit U1 and connect the 5V positive source by R3,7～10 pin of 14～17 pin combination hub J3,18 pin connect the end of C14 by R17,19 pin connect the end of C14,20 pin connect the other end of the end of C13 and C14 and connect the 5V positive source, 10 pin connect an end and the amplifying circuit of 8 pin and C16 by R7,7 pin connect the end of crystal oscillator Y3,6 pin connect the other end of crystal oscillator Y3 and pass through R6 ground connection, 5 pin ground connection, 4 pin connect 1 pin, 3 pin connect 2 pin by R4 and connect the end of C15 by R5, the other end ground connection of C13 and C16, another termination of C15 is plucked/the on-hook circuit.

The amplifying circuit of present embodiment is connected and composed by triode Q3, R9～R12.The base stage of triode Q3 connects 8 pin of integrated circuit U2 by R10 and connects the 5V positive source and connect 5V positive source, emitter by R11 ground connection, collector electrode by R9 and connects and pluck/on-hook circuit and by R12 ground connection.

The plucking of present embodiment/on-hook circuit is connected and composed by triode Q1, triode Q2, diode D2～diode D7, R8, R13～R16, socket J2.The base stage of triode Q1 connects the anodal of 24 pin of integrated circuit U1 and diode D2 and connects the 5V positive source by R8 by R13, the collector electrode of collector connecting transistor Q2 also connects the base stage of triode Q2 and the positive pole of diode D3 by R14, grounded emitter, the minus earth of diode D2, the emitter of triode Q2 by R15 connect the negative pole of diode D3 and double-tone frequently the C15 of communicating circuit the other end and connect the negative pole of diode D4 and the negative pole of diode D5, the positive pole of diode D6 and diode D7 is by R12 ground connection, 1 pin of the termination socket J2 of the negative pole of the positive pole of diode D4 and diode D6 and R16,2 pin of the other end combination hub J2 of the negative pole of the positive pole of diode D5 and diode D7 and R16, the socket J2 line of answering the call.

The serial output circuit of present embodiment is connected and composed by integrated circuit U4, C9～C12, serial communication interface, and the model of integrated circuit U4 is MAX232, the model C OM1 of serial communication interface.10 pin of integrated circuit U4 connect two ends that two ends, 4 pin and 5 pin that 11 pin of integrated circuit U1,10 pin that 9 pin meet integrated circuit U1,3 pin, 1 pin and 3 pin that 8 pin connect serial communication interface meet C10 respectively meet C12 respectively, an end, the end of negative supply termination C11,6 pin that the positive supply termination meets C9 and connect 2 pin, the 15 pin ground connection that 5V positive source, 7 pin connect serial communication interface, another termination 5V positive source of C9, the other end ground connection of C11,5 pin ground connection of serial communication interface, serial communication interface connects external equipment.

Operation principle of the present utility model is as follows:

Do not have with situation that server is connected under, the time that the utility model shows is the time that the 6 pin output integrated circuit U3 by the integrated circuit U4 of clock circuit produces.Complete communication process of the utility model is:

Under the power supply opening state, carry out the standard time application automatically or by hand according to instruction.Single Chip Microcomputer (SCM) system is at first according to the default Phone Dialer that starts, integrated circuit U1 goes out 13 pin of dialing signal to integrated circuit U2 by 15 human hair combing wastes, and 2 pin by integrated circuit U2,3 pin with dialing signal by pluck/the on-hook circuit delivers to telephone line by socket J2 again, the utility model is in off hook state, if run into busy tone, can't transfer to, integrated circuit U2 passes to Single Chip Microcomputer (SCM) system by 9 pin with information, Single Chip Microcomputer (SCM) system is sent on-hook signal by 24 human hair combing wastes of integrated circuit U1, interrupts this connection; If connect unimpeded, behind the server off-hook, Single Chip Microcomputer (SCM) system starts double-tone frequency telecommunication circuit and server carries out exchanges data, time reference signal amplifies to triode Q1 by socket J2, pass through 8 pin of integrated circuit U2 again to integrated circuit U2, send into Single Chip Microcomputer (SCM) system by 9 pin of integrated circuit U2 again, Single Chip Microcomputer (SCM) system writes integrated circuit U3 to the standard time that is obtained in real time by 22 pin of integrated circuit U1 and 6 pin of integrated circuit U3.After having finished data passes, 24 human hair combing wastes of integrated circuit U1 send on-hook order on-hook.Finish a communication process.In addition, Single Chip Microcomputer (SCM) system writes data by real-time 8 pin to integrated circuit U4 of 11 pin of integrated circuit U1, and integrated circuit U4 sends one time standard time information outside each second by 14 pin.

Claims (1)

1, the accurate time transfer receiver of a kind of double-tone frequency marking is characterized in that it comprises:

Be used for microcontroller system that complete machine is controlled;

Clock circuit, this circuit is connected with microcontroller system;

Double-tone is telecommunication circuit frequently, and this circuit is connected with microcontroller system;

Amplifying circuit, this circuit is connected with double-tone frequency telecommunication circuit;

It comprises plucks/the on-hook circuit, the input order sheet department of computer science of this circuit double-tone telecommunication circuit frequently of unifying;

It also comprises the serial output circuit, the input order sheet computer system of this circuit.

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