CN2251232Y

CN2251232Y - Telephone charge terminal with long-distance communication function

Info

Publication number: CN2251232Y
Application number: CN 95218581
Authority: CN
Inventors: 汪汇
Original assignee: ZHONGDIAN TECHNOLOGY Co ANHUI
Current assignee: ZHONGDIAN TECHNOLOGY Co ANHUI
Priority date: 1995-08-05
Filing date: 1995-08-05
Publication date: 1997-04-02
Anticipated expiration: 2005-08-05

Abstract

The utility model relates to a telephone charging terminal with the function of long-distance communication. The utility model is composed of a micro-computer circuit, a communication chain line, and a power supply circuit. The utility model is characterized in that a communication circuit which is composed of programmable IO expansion device, a modem, and a double audio frequency receiving and sending machine is adopted; the utility model exchanges information with a center station through a telephone line interface circuit, the double audio frequency receiving and sending machine, and the modem; the utility model has the function of long-distance communication and is managed by the center station intensively. The utility model can carry out the automatic change between concessional rate and full rate according to set time. The set of the time of a calendar clock and concessional rate and rate can be modified in real time by the center station. The utility model can charge exactly and can be managed conveniently.

Description

Ticketing terminal with remote communicating function

The utility model relates to the ticketing device.

Various public telephone taximeter of the prior art only can be realized public telephone is carried out immediately-charging, and existing weak point comprises: preferential price and full price can not automatically switch, and the charge situation has no way of inquiring about, and brings opportunity to arbitrary imposition of fees.In addition, the quite inconvenience when area code and rate modification of this class taximeter is managed for public words and is caused difficulty.

The purpose of this utility model is to avoid above-mentioned existing in prior technology weak point, provide a kind of and place the public public telephone billing terminal of talking about under administrative department's centralized monitor by means of communication, revise so that the unified of area code and rate etc. charged, is convenient in strictness by valuating, the realization public affairs are talked about to charge and are controlled automatically.

The purpose of this utility model is realized by following technical scheme:

Structure of the present utility model is formed and is comprised:

A, the microcomputer circuit of forming by microprocessor and memory, real-time clock, power monitoring, decoding and control logic, printing interface;

B, the communication link of forming by communicating circuit, words line interface circuit;

C, power circuit;

Architectural feature of the present utility model is:

A, employing are by programmable I/O expander U ₁₁, modulator-demodulator U ₁₂With double-tone frequency transceiver U ₁₃The communicating circuit that constitutes.Wherein, IO expander U ₁₁By data/address bus D ₀～D ₇With microprocessor transmission information; Modulator-demodulator U ₁₂Be arranged on IO expander U ₁₁And between the words line interface circuit, its TC pin is connected with words line interface circuit fsk signal input A, the RC pin is connected with words line interface circuit fsk signal output B.Double-tone is transceiver U frequently ₁₃Be arranged between microprocessor and the words line interface circuit its D ₀～D ₃Pin connects microprocessor data bus, words line L ₁, L ₂By resistance-capacitance coupling to double-tone transceiver U frequently ₁₃IN+ and IN-pin, U ₁₃The double-audio signal of output is connected with words line interface circuit OTMF signal input part C by its TONE pin.

B, described words line interface circuit adopt transformer-coupled circuit, transformer T ₂Primary side is by relay R LY ₁Normally opened contact and words line L ₁, L ₂Connect, the fsk signal of its secondary output is delivered to the fsk signal of output B coupling amplification to output B through amplifying circuit; Deliver to transformer T from the fsk signal of input A and the double-audio signal of input C by amplification ₂Secondary coil.Setting is by diode, photoelectricity coupling U ₁₆, U ₁₇And the anti-polar signal testing circuit that constitutes of resistive element, its input line L that answers ₁, L ₃, output meets microprocessor U ₁P ₁₃And P ₁₄Pin.Setting is detected by the ring that rectifying and wave-filtering, photoelectricity coupling, shaping pulse constitute, and its input passes through by relay R LY ₁, triode Q ₅This machine circuit for answering that the constitutes line L that answers ₁, L ₂, output RING meets microprocessor U ₁Interrupt INT O pin.At words line L ₃Last setting is by relay R LY ₂With triode Q ₆The words line on-off control circuit that constitutes.

The utility model is as the billing terminal of microcomputer system, under microprocessor control, carry out information exchange by words line interface circuit, double-tone frequency transceiver and modulator-demodulator and central station, possessed the function of telecommunication, make it to be under the central station centralized management.

Compared with the prior art,, can make and carry out communication between this terminal and the central station because the utility model adopted modulation-demodulation circuit, thus can accurate billing, convenient management, have following advantage:

1, the utility model can carry out preferential price and full price automatic switchover by the time of setting.

2, working condition of the present utility model can be grasped in real time by central station.

3, be provided with can be by the central station real time modifying rate of the present utility model and calendar clock, preferential price time.

4, the utility model possesses the ticket storage function, and ticket information can be sent to central station by modulator-demodulator.

5, close under the electric situation, can be by the words line ring power supply that opens a terminal, and enter operating state.

In addition, double-sided display that the utility model possessed and printing device help the caller to charge enforcement supervision.

Fig. 1 is the utility model microprocessor and memory circuit schematic diagram.

Fig. 2 is the utility model power monitoring, decoding and control logic circuit schematic diagram.

Fig. 3 is the print interface circuit schematic diagram.

Fig. 4 is the communicating circuit schematic diagram that modulation, double-tone are received and dispatched frequently and the programmable I/O expander constitutes.

Fig. 5 is words line interface circuit theory diagrams.

Fig. 6 is power circuit principle figure.

Fig. 7 is the real time clock circuit schematic diagram.

By the following examples, in conjunction with the accompanying drawings the utility model is further described.

Embodiment:

Referring to Fig. 1, microprocessor and memory circuit adopt 8031 as central processing unit U ₁Adopt 74HC373 as address latch U ₂, under 8031ALE pin output pulse control, latch low eight bit address, and offer other chip; Adopt 62256 as data storage U ₃And adopt 27128 as program storage U ₄

Referring to Fig. 2, adopt TL ₇₇₀₅As supply monitor U ₅, when power down and deadlock, provide high level reset pulse RH and low level reset pulse RL to other chip of system, make system reset.As shown in the figure, with 74HC ₁₃₉As decoder U ₆: A and U ₆: B, to Senior Three bit address A ₁₃, A ₁₄And A ₁₅Decipher and produce chip selection signal CS ₂(IO expander U ₁₁Chip select signal), CS ₁(double-tone is received and dispatched U frequently ₁₃Chip select signal), CS ₃And CS ₄, CS wherein ₃Through U ₇: after B4069 is anti-phase and by U ₅The RL that produces is added to U respectively ₈: A (74HC ₀₀) two inputs produce chip selection signal CS ₅As clock chip U ₁₉Select signal; CS ₄Through U ₇: after A is anti-phase and by U ₅The RL that produces is added to U respectively ₈: B (74HC ₀₀) two inputs produce chip selection signal CS ₆As data storage U ₃Chip select signal.Supply monitor U ₅The irq signal of RES end is from clock circuit.

Referring to Fig. 3, adopt by NOR gate U ₉: A and U ₉: B forms flip and flop generator and Schmidt trigger U ₁₀: A, export TP to U to the commutator pulse shaping that printer provides ₁T ₁Pin.By Schmidt trigger U ₁₀: B and U ₁₀: reset pulse and note detection pulse shaping in addition that C sends printer respectively, deliver to U then respectively ₁P ₁₀Pin and P ₁₁Pin.As shown in Figure 3, R ₂, Q ₁, R ₃, D ₁, Qz forms printer coil drive circuit, at U ₁₁Port PA ₂Control drives the printer coil down.R ₄, R ₅, Q ₃, D ₂, C ₆And Q ₂Form the printer motor drive circuit, at U ₁₁Port PA ₁Under the pin effect, the stall of control printer motor.

Referring to Fig. 4, adopt AM ₇₉₁₀As modulator-demodulator U ₁₂, at IO expander U ₁₁Control is finished data transmit-receive work down.U ₁₁Data/address bus D from microprocessor ₀～D ₇The data that reception will send are given U ₁₂, and be modulated into fsk signal by it, deliver to words line interface circuit input end A from the TC pin; Fsk signal from words line interface circuit output end B is delivered to U ₁₂The RC pin, and be demodulated to binary data by it and give U ₁₁, again by U ₁₁Export the data/address bus D of microprocessor to ₀～D ₇, as shown in Figure 4, adopt MT ₈₈₈₀As double-tone frequency transceiver U ₁₃, words line L ₁, L ₂On the dual-tone dialing signal by by C ₁₂, R ₁₆, C ₁₃And R ₁₇The resaistance-capacity coupling circuit that constitutes is delivered to U ₁₃IN+ and IN-pin, and convert the data/address bus D that binary data exports microprocessor to by it ₀～D ₃By microprocessor data bus D ₀～D ₃The call number data of input are by U ₁₃Convert the dual-tone dialing signal to and be sent to words line interface circuit input end C from its TONE pin.

Referring to Fig. 5, words line interface circuit includes:

Transformer coupled: as to adopt by capacitance C ₁₆With audio frequency transformer T ₂The transformer-coupled circuit of forming is isolated this machine and words line.Output, input amplifying circuit adopt operational amplifier U ₁₄: A, U ₁₄: B, U ₁₄: C and U ₁₄: D amplifies audio signal.From U ₁₂The fsk signal of TC pin and U ₁₃The double-audio signal DTMF of TONE pin passes through capacitor C ₁₄, C ₁₅Coupling is delivered to by R ₂₀, R ₂₁, R ₂₂, U ₁₄: A, U ₁₄: the amplifying circuit that B forms amplifies, again by transformer T ₂Be coupled to telephone line L ₁, L ₃, from words line L ₁, L ₃The FSK audio signal by transformer T ₂Coupling circuit is delivered to by D ₈, D ₉, U ₁₄: C, R ₂₉, R ₂₈, R ₃₀, U ₁₄: the amplifying circuit that D forms amplifies, and delivers to U again ₁₂The RC pin.

Anti-polar signal testing circuit: by diode D ₁₁, D ₁₂, D ₁₃, D ₁₄Photoelectrical coupler U ₁₆, U ₁₇And resistance R ₃₂, R ₃₃Form, anti-polar signal testing circuit dialogue line states is monitored, and central processing unit U is sent in its output ₁P ₁₃And P ₁₄Pin.

Ring detecting circuit: from words line L ₁, L ₂Bell signal pass through resistance R ₂₄, capacitor C ₁₇The coupling circuit that constitutes is delivered to current rectifying and wave filtering circuit (by diode D ₄, D ₅, D ₆, D ₇And capacitor C ₁₈Form) be rectified into the DC signalling pulse voltage, through voltage-stabiliser tube Z ₁Remove to drive photoelectrical coupler 4N ₂₅(U ₁₅), U ₁₅The pulse signal of output is sent out device U through Schmidt ₁₀: D and NOR gate U ₉: be sent to microprocessor U after the C shaping ₁The INTO pin;

This machine circuit for answering is by relay R LY ₁, R ₂₆, D ₃, Q ₅Constitute, at U ₁₁Port PA ₃Finish this machine off-hook and on-hook operation under the control;

By R ₃₁, Q ₆, RLY ₂, D ₁₀The subscribers feeder control circuit that constitutes is at U ₁₁Pin PA ₄Control is the break-make user telephone line down.

Referring to Fig. 6, in power circuit, be provided with by triode Q ₇, light activated power thyristor U ₁₈(MOC ₃₀₆₁) and the power switch circuit that constitutes of bidirectional triode thyristor G, triode Q ₇Base stage by by NAND gate U ₈: C and inverter U ₇: the logical circuit that C constitutes accepts to come respectively Self-sound-produced bell to detect output D and microprocessor U ₁P ₁₂The end output signal.This power switch circuit is carried out control to the AC power break-make, and the 220V AC power is through transformer T ₁After the step-down, by rectifier bridge QL, three terminal regulator MC ₇₈T ₀₅Carry out rectification and voltage stabilizing and form DC power supply, give system's each several part power supply.

Referring to Fig. 7: real-time clock adopts MC ₁₄₆₈₁₈AP chip U ₁₉, its required clock signal is by three not gate (U of inverter 4069 ₇: D, U ₇: E, U ₇: F, crystal oscillator CY ₄, C ₂₄, R ₄₃) oscillator formed provides U ₁₉By data/address bus D ₀～D ₇To system provide standard year, month, day, hour, min, second and week data.The IRQ of its output is toward the INT of microprocessor ₁Pin, and by electric R ₁Be sent to supply voltage monitoring device TL ₇₇₀₅

Allowing the user to use under the situation of telephone line, the substation state monitors it by the anti-polar signal testing circuit by 8031, and microprocessor 8031 obtains a pulse telephone number that the user presses or from MT from the output of anti-polar signal testing circuit behind user's off-hook ₈₈₈₀Output obtain user institute by the dual tone phone number be presented on two displays, and judge whether off-hook of callee according to the output of anti-polar signal testing circuit, if off-hook is then talked about number, the temporal information that real time clock circuit provides, charge information and the actual air time in the data memory according to user institute by electricity and is chargeed, and on two displays, show corresponding information, and detect whether on-hook of user by the anti-polar signal testing circuit, if corresponding charge information is then printed in on-hook; Otherwise continue to charge, up to user's on-hook.If callee not off-hook then continues to detect, until called off-hook or The Calling Party Hooks On.

If central station caller, disconnect user phone circuit then, billing terminal off-hook circuit is in running order, and show at two displays and to enter the data communication state information, the data that send are obtained by the data/address bus of IO expander from microprocessor, and deliver to modulator-demodulator by it, by modulator-demodulator it are modulated into fsk signal, output is amplified, and the fsk signal after the amplification is coupled to telephone line by audio frequency transformer.The fsk signal that receives is coupled to LM by audio frequency transformer from telephone line ₃₂₄Amplify, the fsk signal after the amplification is delivered to modulator-demodulator, is demodulated to data-signal by it and delivers to the data/address bus of microprocessor through the IO expander by microprocessor reception and processing.

Close electricity but feed cable does not break away under the situation of power supply at billing terminal, if there is ring to arrive, billing terminal self-opening power supply then, and enter the data communication state, and after finishing relevant work automatically cutting off power source.

Claims

1, a kind of ticketing terminal with remote communicating function, its composition comprises:

C, power circuit;

It is characterized in that:

A, employing are by programmable I/O expander U ₁₁(82C ₅₅), modulator-demodulator U ₁₂(AM ₇₉₁₀) and double-tone frequency transceiver U ₁₃(MT ₈₈₈₀) communicating circuit that constitutes, wherein, IO expander U ₁₁By data/address bus D ₀～D ₇With microprocessor transmission information; Modulator-demodulator U ₁₂Be arranged on IO expander U ₁₁And between the words line interface circuit, its TC pin is connected with words line interface circuit fsk signal input A, the RC pin is connected with words line interface circuit fsk signal output B; Double-tone is transceiver U frequently ₁₃Be arranged between microprocessor and the words line interface circuit its D ₀～D ₃Pin connects microprocessor data bus, words line L ₁, L ₂By resistance-capacitance coupling to double-tone transceiver U frequently ₁₃IN+ and IN-pin, U ₁₃The double-audio signal of output is connected with words line interface circuit OTMF signal input part C by its TONE pin;

B, described words line interface circuit adopt transformer-coupled circuit, transformer T ₂Primary side is by relay R LY ₁Normally opened contact and words line L ₁, L ₂Connect, secondly the grade coupled output fsk signal that output is amplified after amplifying circuit amplifies is to output B; Deliver to transformer T from the fsk signal of input A and the double-audio signal of input C by amplification ₂Secondary line chart; Setting is by diode D ₁₁～D ₁₄, photoelectricity coupling U ₁₆, U ₁₇(4N ₂₅) and resistance R ₃₂, R ₃₃The anti-polar signal testing circuit that constitutes, its input line L that answers ₁, L ₃, output meets microprocessor U ₁P ₁₃And P ₁₄Pin; Setting is by rectifying and wave-filtering D ₄～D ₇, C ₁₈, photoelectricity coupling U ₁₅(4N ₂₅), shaping pulse U ₁₀: D, U ₉: the ring that C constitutes detects, and its input passes through by relay R LY ₁, triode Q ₅This machine circuit for answering that the constitutes line L that answers ₁, L ₂, output RING meets microprocessor U ₁Interrupt INT O pin; At words line L ₃Last setting is by relay R LY ₂With triode Q ₆The words line break-make control that constitutes.

2, billing terminal according to claim 1 is characterized in that, adopts by clock chip U ₁₉(MC ₁₄₆₈₁₈AP) real-time clock of Gou Chenging, its outputting standard time is by data/address bus D ₀～D ₇To microprocessor, interrupt signal IRQ is connected to microprocessor U ₁Interruption 1 pin INT ₁, and pass through resistance R ₁Be connected to supply voltage monitoring device U ₅Reset terminal RES.

3, billing terminal according to claim 1 is characterized in that being provided with by triode Q in power circuit ₇, light activated power thyristor U ₁₈(MOC ₃₀₆₁) and the power switch circuit that constitutes of bidirectional triode thyristor G, triode Q ₇Base stage by by NAND gate U ₈: C and inverter U ₇: the logical circuit that C constitutes accepts to come respectively Self-sound-produced bell to detect output D and microprocessor U ₁P ₁₂The end output signal.