CN2171180Y - Automatic alarm device for telephone - Google Patents

Abstract

The utility model provides an automatic alarm device for a telephone, overcoming the defect of blind dialing of a traditional telephone alarm device. The utility model comprises a detector, a dial circuit and a language circuit, and also comprises a switch-on signal identification circuit which comprises a signal amplifier, a decoding integrated block and a triode. When receiving the switch-on signals returned by an alarm-receiving telephone, the switch-on signal identification circuit makes the dial circuit stop working and makes the language circuit work in order to carry out alarm to the alarm-receiving telephone. The utility model has the advantages of reliable performances and simple structure.

Description

Automatic alarm device for telephone

The utility model relates to a kind of telephone automatic alarm device.

Along with the raising of living standards of the people, phone has progressed into huge numbers of families, various devices of reporting to the police by telephone wire also occurred thereupon.As installing various corresponding detectors (for example fire detector, pir intrusion detector etc.) at the scene of need warning, warning device is put through the phone of receiving a crime report of fire-fighting center or public security bureau automatically when breaking out of fire or theft, reports to the police by telephone wire.This warning device has characteristics fast.But present telephone alarm exists following shortcoming: just to the predefined dialing of receiving a crime report, just to the telephone call of receiving a crime report, whether and connect behind the FD finished dialing by the phone of no matter receiving a crime report after its detector detects alarm for telephone alarm.Therefore the general employing of this alarm method that dials repeatedly, report to the police is to guarantee that alarm is sent to the phone of receiving a crime report.Because this dialing repeatedly, reporting to the police can not stop after reporting to the police successfully automatically, thereby certainly will influence other User Alarms.

The purpose of this utility model is to provide a kind of telephone automatic alarm device, and whether this device phone of after dialing detection being received a crime report is connected, and only just sends information after the closing of the circuit of receiving a crime report.

Telephone automatic alarm device of the present utility model, comprise the detector of surveying various alarms, dial-up circuit and the language circuit that stores language to the predetermined dialing of receiving a crime report, described detector links to each other with described dial-up circuit, with the work of control dial-up circuit, the output of described language circuit links to each other with telephone set phonetic entry end, it is characterized in that described telephone automatic alarm device also comprises the connection signal identification circuit, described connection signal identification circuit comprises signal amplifier, decoding integration block and triode, the described signal amplifier of the input terminal of described decoding integration block links to each other to receive from telephone wire, connection signal through described signal amplifier amplification, the output of described decoder ic links to each other with described transistor base, on described transistor collector, be serially connected with a relay, the contact of described relay is a two-way contact, the stiff end of its contact links to each other with power supply, and end of convert links to each other with described language circuit with described dial-up circuit respectively.

Telephone automatic alarm device of the present utility model is characterised in that has increased a connection signal identification circuit, whether the identification of connection signal identification circuit connects the phone of receiving a crime report, if access failure, then dial-up circuit works on, if on, then cut off the dial-up circuit power supply it is quit work, the power supply of connecting the language circuit simultaneously makes its work.Therefore telephone automatic alarm device of the present utility model has overcome the shortcoming that the traditional alert device is blindly reported to the police, and can report to the police not meaningless busy line and influence other User Alarms reliably.

Describe embodiment of the present utility model in detail below in conjunction with following accompanying drawing, wherein,

Fig. 1 is the block diagram of telephone automatic alarm device of the present utility model;

Fig. 2 is the physical circuit figure of block diagram shown in Figure 1;

Fig. 3 is the connection layout of telephone automatic alarm device of the present utility model and telephone set;

Fig. 4 is the circuit diagram at the circuit of the circuit place increase of receiving a crime report;

Referring to Fig. 1, telephone automatic alarm device of the present utility model comprises detector 1, dial-up circuit 2, connection signal identification circuit 3 and sound circuit 4, and detector 1 is used to survey various alarms, and as fire alarm etc., its structure should design according to the classification of alarm.Detector 1 links to each other with dial-up circuit 2, and dial-up circuit 2 links to each other with the keyboard of telephone set 5, makes dial-up circuit 2 work when detector 1 detects alarm, to dial to predetermined alarm call.Connection signal identification circuit 3 links to each other with telephone wire by telephone set 5, after connection signal identification circuit 3 obtains receiving a crime report the connection signal of phone, dial-up circuit 2 is quit work, and the speech speech circuit 4 that links to each other with telephone set 5 is worked, by the receive a crime report telephone call of telephone wire on, the content of warning can be stored in the language circuit 4 in advance.

Fig. 2 is a telephone automatic alarm manipulated or operated apparatus of the present utility model.As shown in Figure 2, the detector among Fig. 11 comprises a magnetic switch CK, relay J 1 and thyristor CR.Relay J 1 has two normally opened contact J _1-1And J _1-2, contact J _1-1With other two normally-closed contact J _3-1, J _4-1Be connected in parallel on the telephone hook switch HK after (hereinafter narration) series connection; Contact J _1-2Be serially connected between the power supply circuits of power supply and connection signal identification circuit 3.Magnetic switch CK can be arranged on door or the window, when door or window are opened, and relay J 1 action, its normally opened contact J _1-1Closure, its effect is similar to telephone hook switch and upsprings, and phone is in awaiting digit state, normally opened contact J _1-2Also closed, with to circuit supplies such as dial-up circuits.If desired fire is guarded against, then magnetic switch CK available heat photosensitive elements replaces.As shown in Figure 2, also be serially connected with a push-button switch B between detector and power supply, when this switch B closed, this telephone automatic alarm device was on the alert.

Referring to Fig. 2 upper right portion, this part is the circuit diagram of dial-up circuit among Fig. 1, it comprise among oscillator stage, counting circuit Q1 and a plurality of photoelectrical coupler Q2(figure that constitutes by not gate F1, F2 and F3 only show one).Oscillator links to each other with the input end of clock of counting circuit Q1.In the present embodiment, this counting circuit Q1 adopts CD4017B decimal system counting/decoder.It has 10 decoding outputs, and high level appears in these ten decoding outputs successively.Owing to consider present domestic areal (as a city or county) interior telephone number length be the longest to be seven, therefore used the first seven decoding output (2,4,7,10,1,5,9) in the present embodiment, deciphered outputs (2,4,7,10,1,5,9) to these seven and receive (not shown) on the correspondent button of keyboard of telephone set by photoelectrical coupler Q2 respectively.For example, the telephone number of alarm call is 1234567, then respectively seven decoding outputs (2,4,7,10,1,5,9) of counting/decoder is received on 1,2,3,4,5,6 and 7 numerical keys of telephone set successively.When seven decoding outputs (2,4,7,10,1,5,9) when high level occurring successively, these seven keys that are equivalent to telephone set are pressed successively.Last decoding output 11 of CD4017B decimal system counting/decoder Q1 is connected on capacitor C 1 and the triode T1 base stage capacitor C 1 other end ground connection by resistance R 1.Serial connection, a relay J 3 on the collector electrode of triode T1, this relay J 3 has two contact J _3-1, J _3-2, J wherein _3-1Be normally-closed contact, with the contact J of other two relay J 1, J4 _1-1, J _4-1Be connected in parallel on after the serial connection on the telephone hook switch HK.J _3-2Be normal opening and closing points, last decoding output 11 is by this contact J _3-2With a small resistor R2 ground connection.CD4017B decimal system counting/decoder has such characteristic, promptly after high level appears in ten outputs successively, only just enters another time circulation after reset terminal has a low pulse input.Therefore, when last output (11) when high level occurring (this output (11) links to each other and self-locking with (13)), capacitor C 1 is recharged, current potential on the capacitor C 1 raises gradually, triode T1 conducting after rising to certain voltage makes relay J 3 actions, thus its normally-closed contact J _3-1Open, be equivalent to on-hook.The time that makes it to rise to certain potentials to capacitor C 1 charging is set at about 15 seconds in the present embodiment, and this time is actually the time that the phone off-hook of receiving a crime report is waited in the dialing back, as meet busy tone or off-hook not in this time, redials after the on-hook just.After relay J 3 actions, contact J _3-2Closure makes end (13) by resistance R 2 bypasses, breaks away from self-locking, becomes low level, and capacitor C 1 is by resistance R 1 and R2 discharge, and after being discharged to zero potential, triode T1 ends, relay J 3 normally-closed contact J _3-1Recover normally closed, normally opened contact J _3-2Recover often to open, simultaneously, decimal system counting/decoder Q1 enters next count cycle, dials once number again.

If waiting in above-mentioned 15 seconds in the time of the phone off-hook of receiving a crime report, the phone off-hook of receiving a crime report, in the ordinary course of things, the phone of receiving a crime report can not return connection signal to warning circuit.For making the phone of receiving a crime report to return a connection signal to alarm call, the phone of receiving a crime report some changes (specifically changing content describes below) have been done.Whether the connection signal identification circuit 3 of this telephone automatic alarm device is differentiated the phone of receiving a crime report by telephone set 5 connection signal.Shown in Fig. 2 upper left, connection signal identification circuit 3 includes signal amplifier, decoding integration block Q3 and triode T2, and signal amplifier is made of three not gate F4, F5, F6 serial connection, and it amplifies signal, so that offer decoder.This signal amplifier also can be made of elements such as triodes.In the present embodiment, decoding integration block Q3 adopts LM567, and its input 3 links to each other with the signal amplifier output, and its output 8 is connected to the base stage of triode T2 by resistance R 3, serial connection one relay J 2 on the collector electrode of triode T2, the contact J of this relay _2-1Be two-way contact, the stiff end of its contact is by the contact J of relay J 1 _1-2Link to each other with power supply, two end of converts link to each other with language circuit 4 with dial-up circuit 2 respectively.In the starting stage, contact J _2-1Connect with dial-up circuit.After connecting identification circuit 3 and identifying the phone of receiving a crime report and returned connection signal, the output 8 of LM567 decoder Q3 becomes low level, triode T2 conducting, relay J 2 electronic work, contact J _2-1Disconnect with dial-up circuit 2 and receive on the language circuit 4, to 4 power supplies of language circuit.At this moment dial-up circuit 2 outages quit work, and language circuit 4 must be established beginning work by cable.

Referring to Fig. 2 bottom left section, language circuit 4 comprises the language set that stores speech signal Q6 in blocks, count integration block Q5 and 555 integrated package Q4.Count integration block Q5 can adopt decimal system counting/decoders such as MC14017, and it and 555 integrated package Q4 constitute conventional delay circuit, and this delay time is consistent with the time of the language of language set Q6 storage in blocks.Former the outputs (3 of count integration block Q5,4,10 etc.) link to each other with language integrated package Q6, in delay time, these ends are exported high level successively, make the language integrated package Q6 work that links to each other with phone transmitter, be stored in speech signal that is used to report to the police in it and be sent to the phone of receiving a crime report of on by telephone set and telephone wire, after having crossed delay time, former the outputs (3 of count integration block Q5,4,10 etc.) be low level, language set Q6 in blocks quits work, and the output of count integration block Q5 (5) becomes high level (this output 5 is because of the self-locking that links to each other with 13 ends), the triode T3 conducting that base stage is attached thereto, and then make relay J 4 actions that are serially connected on this triode T3.Relay J 4 has a normally-closed contact J _4-1, this normally-closed contact J _4-1Contact J with relay J 1 _1-1, relay J 3 contact J _3-1Be connected in parallel on after the serial connection on the telephone hook switch HK.When relay J 4 actions, normally-closed contact J _4-1Open, be equivalent to hang up the telephone, whole alarm procedure is finished.In the present embodiment, language set Q6 in blocks adopts language circuit EPROM on sale on the market, and the content of storage can be wiped rewriting under certain condition in this integrated, but canned data can not lost yet after the dead electricity.

Several contacts of warning device of the present utility model can also method as shown in Figure 3 link to each other with telephone set.In this method of attachment, except that the telephone set of normal use, also increased the cover telephone circuit the same with telephone set, this telephone set network and this warning device are made an integral body, and whole like this device (comprising telephone set network and warning device of the present utility model) just can be installed in more hidden place.

Introduce the change at the phone place that receives a crime report below.According to the requirement of telephone automatic alarm device of the present utility model, the phone of receiving a crime report should send a signal from the trend alarm call behind off-hook, and this signal can be the square wave or the positive signal of string ripple frequently of certain frequency.

After making the phone of receiving a crime report mention (connection) at receiver, can send a connection signal back to, on the telephone set of receiving a crime report, increase set of circuits as shown in Figure 4 to alarm call.This group circuit is connected between telephone hook switch HK ' and the ground.Its course of work is that when the phone of receiving a crime report was mentioned, hook switch HK ' closed, to capacitor C ' charging, triode T ' conduit makes and the photoelectrical coupler Q ' work of chain mutually of the telephone set of receiving a crime report " * " key, its effect is to be equivalent to by " * " key once, sends the sine wave of a string 900Hz to alarm call.After capacitor C ' charging finished, triode T ' ended, and photoelectrical coupler Q ' quits work.In the zone that the dual tone phone machine is arranged, can suitably improve the crystal oscillator frequency of the telephone set of receiving a crime report for preventing misoperation, as replacing original 3.58M crystal oscillator, can send the sine wave of a string about 3KHz like this back to alarm call with the 10M crystal oscillator.

Claims (4)

1, a kind of telephone automatic alarm device, comprise the detector of surveying various alarms, dial-up circuit and the language circuit that stores language to the predetermined dialing of receiving a crime report, described detector links to each other with described dial-up circuit, with the work of control dial-up circuit, the output of described language circuit links to each other with telephone set phonetic entry end, it is characterized in that described telephone automatic alarm device also comprises the connection signal identification circuit, described connection signal identification circuit comprises signal amplifier, decoding integration block and triode, the input of described decoding integration block links to each other with described signal amplifier to receive from telephone wire, connection signal through described signal amplifier amplification, the output of described decoder ic links to each other with described transistor base, on described transistor collector, be serially connected with a relay, the contact of described relay is a two-way contact, the stiff end of its contact links to each other with power supply, and two end of converts link to each other with described language circuit with described dial-up circuit respectively.

2, telephone automatic alarm device as claimed in claim 1 is characterized in that, described decoding integration block is LM567.

3, telephone automatic alarm device as claimed in claim 1 is characterized in that, described dial-up circuit comprises oscillator, counting/decoding integration block; Described oscillator links to each other with the input end of clock of described counting/decoding integration block, former outputs of described counting/decoding integration block link to each other with photoelectrical coupler, so that receive on the telephone set corresponding digital key, last output is connected on electric capacity (C1) and triode (T1) base stage by resistance (R1), electric capacity (C1) other end ground connection; On the collector electrode of described triode (T1), be serially connected with a relay (J3), a normally-closed contact (J of this relay (J3) _3-1) be connected in parallel on the telephone hook switch normally opened contact (J _3-2) be serially connected between last output of described counting/decoder and the ground.

4, telephone automatic alarm device as claimed in claim 3 is characterized in that described counting/decoder is CD4017B.

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