CN2137058Y - Telephone urgent calling device - Google Patents

Abstract

The utility model relates to an urgent calling device which is connected with telephone lines in parallel. The utility model is composed of a telephone number-storing circuit, a speech-storing circuit, etc. Telephone numbers and speech signals can be randomly arranged in advance by a user. When an accident occurs, the calling device can be started up through a key and can automatically dial a telephone for calling with speech for a receiver. The utility model can be connected with switch signals which are output by various sensors to form a full-automatic alarm without unattended operation. The utility model has the characteristics of simple circuit, low cost, easy adjustment, less investment, and flexible and convenient use.

Description

Telephone urgent calling device

The utility model relates to a kind of at the contingency state, can put through phone automatically, carries out the device that language is called for help, and belongs to the telecommunication technology field.

Existing telephone distress call device can be divided into two kinds at present.

A kind of is to adopt veneer or single-chip microprocessor system, and with telephone number, identification and control program deposit microsystem in, cooperate language generation circuit to finish distress call again.Sort circuit, exploitation, debugging, maintenance all need the dedicated microcomputer development equipment, and the user can not revise the call circuit number.As Chinese patent " No. 90202187.7 " title " distress call device "; " crisis phone only of a kind of intelligent language type " that " application of electronic technology " 92 years 5 periodicals are stepped on etc.

Another kind then is made up of circuit such as busy tone demodulator circuit, pulse discrimination circuit, monostable time-delays, only is applicable to the multifunction push key telephone set, will draw line respectively from put fork key, storage address key, the redial key etc. of this phone during installation, is connected to control circuit.Use is restricted.As: " the telephone automatic dialing warning circuit " that " radio " 90 years the 3rd periodicals are stepped on.

The purpose of this utility model is that a kind of circuit of development is simple, easy to use, and cost is low, the phone distress call device that is easy to promote.

The following circuit theory that is based on the utility model realizes: with the numerical selection pulse generating circuit input of touch-tone telephone, storage and generation phone numerical selection pulse, call for help language with the storage of language circuit, form sequence circuit with digital circuit, the control complete machine is finished functions such as phone off-hook, dialing, language calling for help, on-hook, repetitive operation automatically.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a phone distress call device The general frame.

Fig. 2 is a phone distress call device electrical schematic diagram.

Phone distress call device is made up of commutation circuit 2, polarity transformation circuits 4, electronic switch 5, numerical selection impulse circuit 6, language memory circuit 7, sequence circuit 8, alarm signal 9, it is connected on the telephone wire of telephone set 3, sends telephone number and calls for help language to switch 1.See Fig. 1, Fig. 2.

Commutation circuit is by transistor T 4, relay J 1 and normally opened contact J1-1 thereof, and normally-closed contact J1-2 forms, and guarantees that at ordinary times phone normally uses, and rescue beacon promptly disconnects telephone set after starting, and connects rescue beacon.

Polarity transformation circuits is a bridge rectifier Q, and it is correct to make telephone wire enter the polarity of voltage of rescue beacon.

Electronic switch is made up of transistor T 1, T2 etc., and during as T2 base stage input low level, electronic switch ends, on the contrary then conducting.

The numerical selection impulse circuit is made up of numerical selection pulse generator U1, keyboard, the reset switch K1 of key pad telephone set, and the output of U1 and the input of electronic switch join, and the ranks line of keyboard and U1 joins, and the reset terminal RST of reset switch and U1 joins.U1 can select pulsed, dual-tone multifrequency formula, multi-functional formula numerical selection impulse circuit for use, and this example is pulsed STC2560.

The language storage circuit is made up of language processor U5 and memory U6 etc.Press K2 and can call for help language to the circuit typing, press K3 or add a positive pulse to the PLAY of U5 end, circuit will be reset and call for help language, and be amplified by transistor T 3, send through electronic switch.

Sequence circuit is made up of circuit such as oscillator, counter U4, rest-set flip-flop U2, U3, diode D.U4 is 14 digit counters 4060 that carry oscillator among Fig. 2, and U2, U3 share 4043.The effect of sequence circuit is the operating state of control commutation circuit, numerical selection impulse circuit, language storage circuit.The R termination alarm switch K4 of U3 wherein, the Qe pin of S termination U4, output Q connect the clear terminal RES pin of U4, connect the R end of U2 simultaneously through diode D, and the latter is also joined through the Qd of R9 and U4 pin.The Qa pin of the S termination U4 of U2, its Q holds one the tunnel to connect commutation circuit, and feel the pulse towards the reset terminal RST pin of circuit through capacitor C 3 selectings in another road.The Qb pin of U4 also can be through the typematic key of contactless electronic beam switch or logical circuit control numerical selection impulse circuit through the typematic key of T5, J2, J2-1 control numerical selection impulse circuit.The Qc foot meridian capacitor C4 of U4 connects the playback pin of language language processor U5.

During energized, the charging effect of C5 makes U3 put 1, and the output of U3 makes counter U4 zero clearing, makes U2 zero setting simultaneously, and J1 discharges, and circuit is on the alert.After pressing calling for help K switch 4, U3 zero setting, U4 begins counting, and the calling for help process begins.

Qa-Qe is the one group output of U4 low level to a high position among Fig. 2, and during the U4 counting, following process will appear in circuit successively:

(1) Qa makes U2 put 1, and U1 resets once, and J1 gets electric, and J1-1 connects, and J1-2 disconnects, and realizes off-hook.

(2) that J2 is got is electric for Qb, and J2-1 makes the typematic key closure, and U1 retransmits the telephone number numerical selection pulse of presetting, and realizes dialing.

(3) Qc is triggered the playback end of U5, and U5 begins to send the calling for help language that presets, and implementation language is called for help.

(4) Qd makes U2 zero setting, and J1 discharges, and J1-1 is disconnected, and J1-2 is logical, realizes on-hook.

(5) repeat (1)-(4) several times, realize repetitive operation.

(6) Qe makes U3 put 1, the U4 zero clearing, and U2 zero setting, J1 discharges.

All the calling for help process finishes, and circuit recovers the state of alert.

Alarm signal can adopt hand push button K switch 4, allows to be arranged in parallel a plurality of.If alarm switch links to each other with the switching value signal of various transducer outputs, can constitute unattended automatic telephone alarm.

The utility model can be made of one with telephone set, becomes the telephone set with distress call function.

The utility model circuit is simple, and cost is low, easily debugging, and the production small investment, flexible and convenient to use, have extensive use and be worth.

Claims (3)

1, a kind of distress call device that is attempted by on the telephone wire, it is by commutation circuit 2, polarity transformation circuits 4, electronic switch 5, numerical selection impulse circuit 6, language memory circuit 7 is formed, wherein, commutation circuit 2 is used for switching between switch 1 and telephone set 3 or rescue beacon, the numerical selection impulse circuit produces dial impulse, language content is called for help in the storage of language storage circuit, these two kinds of signals send through electronic switch 5, of the present utility model being characterised in that is provided with a sequence circuit 8, by its control commutation circuit, the numerical selection impulse circuit, the operating state of language storage circuit, sequence circuit is by oscillator, counter U4, rest-set flip-flop U2, U3, circuit such as diode D are formed, the R termination alarm switch K4 of U3 wherein, the Qe pin of S termination U4, output Q connects the clear terminal RES pin of U4, connect the R end of U2 simultaneously through diode D, the latter is also joined through the Qd of R9 and U4 pin, the Qa pin of the S termination U4 of U2, its Q holds one the tunnel to connect commutation circuit, feel the pulse towards circuit reset end RST pin through capacitor C 3 selectings in another road, the closure of the Qb foot control system numerical selection impulse circuit typematic key of U4, Qc foot meridian capacitor C4 connects the playback pin of language language processor U5.

2, phone distress call device according to claim 1, it is characterized in that the numerical selection impulse circuit is made up of numerical selection pulse generator U1, keyboard, reset switch K1, the output of U1 and the input of electronic switch join, the ranks line of keyboard and U1 joins, and the reset terminal of reset switch K1 and U1 joins.

3, phone distress call device according to claim 1 and 2 is characterized in that alarm switch K4 can replace with the switching value signal of various transducer outputs.

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