CN2183060Y - Telephone/Fax Signal Automatic Recognizer - Google Patents

Abstract

The utility model relates to a telephone/fax signal automatic recognizer, which can automatically recognize the telephone/fax signal, and switch to the telephone or facsimile accordingly, and has a grid voltage over-voltage and under-voltage detection circuit to prevent the facsimile from The hazards of grid voltage fluctuations. It is based on the single-chip microcomputer, and simultaneously connects and controls the ringing detection circuit, the fax signal recognition loop, the internal and external hook detection circuit, the fax setting circuit, the grid voltage over and under voltage detection circuit, the memory and the relay switching network. etc., solidify the special control software in the programmable memory, and feed it back to the single-chip microcomputer to realize the switching control of various functions. The integrated phase-locked loop is used as the main unit for fax signal CED identification. Once the fax signal CED is found, the single-chip microcomputer sends an instruction through the control software to automatically turn on the power of the fax machine. After the fax service is over, it automatically turns on the fax machine The power is turned off, and the fax machine is unattended.

Description

Device for automatic identifying signal of telephone and fax

The utility model relates to a kind of automatic control equipment of facsimile machine, and it can discern the phone call/facsimile signal automatically, and can automatic opening/closing facsimile machine power supply.Do not influence telephone communication when facsimile machine is arranged on automated manner, when facsimile signal, it opens the facsimile machine power supply automatically, and in facsimile communication procedure, can monitor mistake, the undervoltage condition of electrical network, makes facsimile machine avoid the harm of voltage ripple of power network.

The use of facsimile machine is increasingly extensive, but there is following problem in popular in the market all kinds of facsimile machines: 1. when facsimile machine is arranged on automated manner, phone is hung not come in, when facsimile machine is arranged on when artificial, must Attended mode, open the facsimile machine power supply; 2. in order to guarantee that facsimile is unimpeded, particularly at busy business system, facsimile machine should be in stand-by state all the time, and promptly the facsimile machine power supply is open-minded, but the long-time continuous energized not only will shorten the useful life of facsimile machine, also wastes energy simultaneously; 3. do not have that facsimile machine is crossed, under-voltage protection function, because supply power voltage is not to be stable, have overvoltage, under-voltage, hit phenomenon takes place, facsimile machine is worked the mischief.Though the existing at present facsimile machine auxiliary equipment that addresses the above problem, but function ratio is more single, produce Pro-128 type phone call/facsimile identifier as Japan, it only has the automatic recognition function of phone call/facsimile, and does not have that facsimile machine automatic power switch function and facsimile machine are crossed, under-voltage protection function; Other has domestic Changzhou to produce facsimile machine from start, and it only depends on detects having or not of ring and determine whether opening the facsimile machine power supply, and does not have the automatic recognition function of phone call/facsimile and facsimile machine is crossed, under-voltage protection function.

Owing to have the problems referred to above, brought many inconvenience for the facsimile machine user.For this reason, the object of the present invention is to provide and a kind ofly can discern the phone call/facsimile signal automatically, and the corresponding facsimile machine auxiliary equipment that switches to telephone set or facsimile machine.When being in automated manner, facsimile machine do not influence telephonic communication, when facsimile signal, it can open the facsimile machine power supply automatically, in facsimile communication procedure, in case find to have overvoltage, under-voltage, power supply hit phenomenon, it can detect and cut off rapidly the facsimile machine power supply in the extremely short time, after treating that power up is normal, it also recovers operate as normal, behind fax completion, automatic powered-down again, need not personnel on duty, guarantee that the phone call/facsimile communication is unimpeded at any time, can prolong the useful life of facsimile machine again.

The purpose of this utility model is achieved in that its core is a chip microprocessor, it connect simultaneously and control that line voltage is crossed, undervoltage detection circuit, ring detecting circuit, facsimile signal (CED) detection loop, memory, relay transit network, inside and outside picking/hanging machine detection circuit, fax be provided with circuit and phonation circuit.By ring detecting circuit, after single-chip microcomputer detected the ringing number of setting, with the facsimile machine power supply opening, facsimile machine switched on the circuit automatically in system.The facsimile signal detection loop is to be the formant of facsimile signal identification with integrated phase-locked loop SNE567, is used for determining facsimile signal.Inner picking/hanging machine detection circuit is used for detecting whether the conversation of people's off-hook is arranged before really beginning facsimile service; Outside picking/hanging machine detection circuit is reaching whether the conversation of people's off-hook is arranged before ringing number is set in order to detect, and whether phone or facsimile are finished.Memory is to be connected into a loop by address latch and programmable storage to be connected on the single-chip microcomputer, solidify special-purpose Control Software in the programmable storage, above detected various signals are analyzed, handled by microprocessor, send corresponding instruction then and go to control the relay transit network.The relay transit network is the actuator of the whole system that is made of four relay parallel connections, by receiving the various instructions that single-chip microcomputer sends, realizes the automatic switch of facsimile machine power supply and the automatic switchover of circuit.Fax is provided with circuit and is made of a push-button switch and a pull-up resistor simply, higher priority is arranged, when telephone communication, as long as press fax simply switch is set, system will open facsimile machine, at this moment the manual transmission/reception of facsimile can be realized, thereby the reserving by phone of facsimile, manual receiving function can be realized.In order to improve the interference free performance of system, adopt between photoelectric coupled device and the telephone network to be coupled, isolated the electrical communication between system and the telephone network.

Fig. 1 is the connection layout of phone call/facsimile automatic identification device provided by the utility model and telephone network.

Fig. 2 is the theory diagram of phone call/facsimile signal automatic identification device provided by the utility model.

Fig. 3 is the facsimile signal CED testing circuit schematic diagram of phone call/facsimile signal automatic identification device provided by the utility model.

Fig. 4 is the special-purpose Control Software block diagram (calling station) of phone call/facsimile signal automatic identification device provided by the utility model.

Fig. 5 is the special-purpose Control Software block diagram (called tation) of phone call/facsimile signal automatic identification device provided by the utility model.

Among the figure, 1-phone call/facsimile signal automatic identification device, 2-telephone set, the 3-facsimile machine, the 4-ring detecting circuit, the inner picking/hanging machine detection circuit of 5-, the outside picking/hanging machine detection circuit of 6-, 7-facsimile signal detection loop, the 8-ringing number is provided with switch, and the 9-fax is provided with switch, 10-overvoltage/undervoltage testing circuit, the 11-chip microprocessor, the 12-latch, 13-programmable storage, 14,15,16,17,18, the 19-driver, 20-relay transit network, the 21-machine of answering the call, 22-connects facsimile machine, the 23-net of answering the call, 24-facsimile machine telephony interface, 25-connects the facsimile machine power supply, and 26-connects civil power, 27-phone indicator light, 28-facsimile machine indicator light, the 29-phonation circuit.

Below in conjunction with accompanying drawing formation of the present invention and function are described.

Chip microprocessor 8031(11) be core component of the present invention, it connects ring detecting circuit (4), inside and outside picking/hanging machine detection circuit (5,6), facsimile signal identification loop (5), memory (12,13), relay transit network (20), overvoltage/undervoltage testing circuit (10) simultaneously.After detecting ringing number the number of times that switch (8) sets is set by ring detecting circuit, tentatively think facsimile signal, single-chip microcomputer sends instruction, fax indicator light (27) is bright, the facsimile machine power supply is connected automatically, and facsimile machine switches on the circuit, and facsimile is unimpeded.Facsimile signal identification loop (7) is with the formant of integrated phase-locked loop SNE567 as signal identification, is used for detecting fax identification signal CED, determines with this whether facsimile formally begins.Before facsimile formally begins, circuit (29) takes place but send the 500HZ single-tone and remind still off-hook conversation of user, simultaneously inner picking/hanging machine detection circuit detects whether the conversation of people's off-hook is arranged, in case detected people's off-hook, single-chip microcomputer (11) sends instruction, relay transit network (20) switches to circuit on the telephone set automatically, and phone indicator light (28) is bright, and telephonic communication is unimpeded.After facsimile formally begins, single-chip microcomputer will be forbidden the conversation of user's off-hook, guarantee the complete of facsimile.Outside picking/hanging machine detection circuit (6) is used for detecting to reach whether people's off-hook is arranged before ringing number is set, and whether the phone call/facsimile communication traffic is finished.Fax is provided with switch (9) and is used for telling that single-chip microcomputer sends instruction, with the facsimile machine power connection, and facsimile machine switched on the circuit, realize the manual transmission/reception of facsimile, it has higher priority, all can have an effect when system initial state or telephonic communication.Relay transit network (20) is made of the conversion of signals relay of a facsimile machine electric power on/off relay and three same models; be in series with a driver (14 between every relay and the single-chip microcomputer; 15; 16; 17) by receiving the various instructions that single-chip microcomputer sends; realize the automatic opening/closing of facsimile machine power supply; and the automatic switchover of circuit; it is the actuator of whole system; over under-voltage protection circuit (10); adopt up-to-date device power source voltage monitor ICL8211/12; adding several resistance forms; in facsimile communication procedure; it can monitor the fluctuation and the hit of line voltage apace; in case this electric circuit inspection has been; after the under-voltage and power supply hit phenomenon, interrupt, have no progeny in the single-chip microcomputer response to the single-chip microcomputer application; the facsimile machine power supply is disconnected, so just make facsimile machine avoid the line voltage mistake; the harm of under-voltage and hit.Memory is by address latch 74ls373 (12) and programmable storage EPROM2732(13) constitute and be connected on the single-chip microcomputer, programmable storage is solidified with special-purpose Control Software in (13), detected extraneous signal is analyzed, handled, and make corresponding instruction and feed back to single-chip microcomputer (11).In order to improve interference free performance of the present invention, the coupling between input and telephone network adopts photoelectrical coupler 4N38.Panel according to the phone call/facsimile automatic identification device that the utility model proposed is provided with telephone set joint (21), facsimile machine joint (22), facsimile machine telephony interface (23), facsimile machine power connection (24), telephone network joint (25) and attaching plug (26).

Have following function according to phone call/facsimile signal automatic identification device provided by the utility model:

1. differentiate extraneous signal automatically, the user can phone, the shared number of fax;

2. the facsimile machine power supply is connected automatically and is closed, and after telling facsimile signal, can automatically the facsimile machine power connection be waited to fax after the service ending, automatically with the facsimile machine dump, can accomplish the facsimile machine unattended operation;

3. have that supply voltage is crossed, undervoltage detection circuit.In facsimile communication procedure, in case find that overvoltage, under-voltage, power supply hit phenomenon are arranged, it can detect in the extremely short time and cut off the facsimile machine power supply rapidly, treat that power up is normal after, it also recovers operate as normal;

4. applicable to dissimilar facsimile machines, stand-alone phone, system telephone or PC fax card;

5. can select full-automatic or semi-automatic work pattern;

6. easy for installation, simple to operate.

Claims (3)

1. A telephone/fax signal automatic recognizer, which consists of a single-chip microprocessor and memory, a mature ringing detection circuit, a fax/telephone relay switching network, internal and external hook detection circuits, fax setting circuits, etc. The connection structure, the single-chip microcomputer as the core component is not only connected to the above circuit, but also connected or controlled by the fax signal CED detection loop, the fax power relay transfer circuit, the fax setting circuit, and the special control software is solidified in the programmable memory, all The components and parts that constitute the above-mentioned circuit are all fixed on a printed circuit board, and it is characterized in that the facsimile signal detection loop is formed by the integrated phase-locked loop SNE567 as the main identification unit, and is connected on the single-chip microcomputer (11) to determine the facsimile signal detection loop. Signal CED, through the ring detection circuit, after the single chip microcomputer detects the set ring times, under the command of the control software, the system automatically turns on the power of the fax machine and switches the fax machine to the line. 2. The telephone/fax signal automatic recognizer according to claim 1, characterized in that said relay transfer network (20) is composed of a power transfer relay and three signal conversion relays of the same type The actuators of the entire system controlled by the control software, each relay is connected in series with a driver (14, 15, 16, 17) and then connected to the single-chip microcomputer, and the output terminals of the relay switching network (20) are respectively connected to telephones, faxes, etc. machine, fax machine telephone interface, telephone network, fax machine power supply and commercial power. 3. The telephone/fax signal automatic identifier according to claim 1, characterized in that the coupling between its input terminal and the telephone network adopts a photocoupler 4N38 to improve the anti-interference performance.

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