CN2202382Y

CN2202382Y - Automatic alarm of telephone line

Info

Publication number: CN2202382Y
Application number: CN 93237267
Authority: CN
Inventors: 从力; 谢茜; 韦欣欣
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-11
Filing date: 1993-07-15
Publication date: 1995-06-28
Anticipated expiration: 2003-07-15

Abstract

The utility model provides an automatic alarm of a telephone line, which is composed of a triggering unit, a control unit, a voice unit and an interface unit. After receiving trigger signals, the control unit can not only dial out stored numbers via the interface unit, but also can carry out discrimination to feedback signals of an exchanger of an urban telephone network, and then, the control unit carries out repeated dialing or sends on site sound via the voice unit to the urban telephone network or sends recording via the interface unit to the urban telephone network. The utility model has the advantages of simple circuits, reliability, high intellectualized degree and convenient use and operation.

Description

Automatic alarm of telephone line

The utility model relates to a kind of device that utilizes telephone line to report to the police, belong to the telephone communication class.

In the prior art, utilize the phone transmission circuit to finish device to fire alarm, robber and police, as CN2078938U, though it can reach the purpose of utilizing the phone transmission circuit to report to the police, but power consumption is big, and can't differentiate whether the someone connect after whether the number of having transferred to was connected or connected, therefore exist certain limitation in the use.

Task of the present utility model is for people provide a kind of interference that do not had a power failure, power consumption is little and have identification the other side off-hook and selection play a record or put the telephone line autoalarm of on-the-spot sound capabilities.

The utility model is made up of trigger element, control unit, voice unit and interface unit, and its technical scheme is: trigger element connects control unit; Control unit connection interface unit, and the signal of reception interface unit feedback, control unit also connects voice unit, voice unit connection interface unit, interface unit links to each other with the local network subscribers feeder by a normally opened contact, and telephone set links to each other with the local network subscribers feeder by a normally-closed contact.

Advantage of the present utility model and effect are: when alarm signal produced, this device not only can in time be sent the telephone number of depositing admittedly successively, and can judge and after treatment according to local network switch feedback signal, will record and on-the-spot sound is sent into local network.Meet power failure, this device still can be worked as usual.This installs intelligent degree height, and volume is little, and cost is low.

Description of drawings:

Fig. 1: the utility model functional-block diagram

Fig. 2: the utility model trigger element electrical schematic diagram

Fig. 3: the utility model control unit electrical schematic diagram

Fig. 4: the utility model voice unit electrical schematic diagram

Fig. 5: the utility model interface unit electrical schematic diagram

Embodiment:

As shown in Figure 2, trigger element is made up of power supply and triggering two parts.Power unit is shown in Fig. 2-1, and it send triggering part to make the work power supply after converting civil power to 12 volts of direct currents.The dc output end of power unit also has the nickel-cadmium cell group, in case have a power failure, the reserve battery power supply, assurance device normally moves.Fig. 2-2 is a triggering part, the simple trigger circuit that the Darlington transistor that it is made of relay J, button K1, T1 and T2 is formed.During with manual warning, can press K.If during, only need signal from the adding of D point, or it is often opened export contact and be connected on the K1 two ends and get final product with other finished product alarm.5 volts of direct currents of trigger element output are sent to each several part as working power.

Control unit shown in Figure 3 is to be that U4, memory 2764 are 8031 minimal application systems that U3 is linked to be by 8031 single-chip microcomputers, latch 74HC373.Required group number is stored among the EPROM2764 in advance.When alarm signal, trigger element output VCC supplies with this cell operation.Export number from 8031 P1.4 mouth to interface unit according to setting program, the signal tone of P1.2 mouth reception interface unit feedback, P1.1 mouth, P1.3 mouth, P1.7 mouth all are connected to voice unit, play the recording that deposits in advance or play on-the-spot sound behind closing of the circuit by their control voice units.The P1.5 mouth is connected to the intermediate contact of an on-off switch K3, and the two ends of K3 connect high and low current potential respectively, and this is a self-test switch.Be connected to a LED 2 in the loop of P1.6 mouth, be used for the display alarm state.

Voice unit shown in Figure 4 is that two to select an analog switch be that U11 and amplifier are formed for U8, CD4053 by UM5100 processor, 27256 memories.Voice are stored among the EPROM27256.When the P1.1 of control unit mouth was sent signal, the 17th pin by UM5100 made the playback line work, shown in Fig. 4-1.The voice of putting from the output of the 23rd, 26 pin of UM5100, through amplifying, after the filtering, delivering to analog switch the 2nd pin by the A point.Shown in Fig. 4-2, on-the-spot sound is picked up by the high sensitivity microphone, delivers to analog switch the 1st pin by the B point after amplifying.Analog switch is under the control of control unit P1.3, P1.7 mouth, and the signal of selecting A point or B to order exports interface unit to.

Interface unit shown in Figure 5 is made up of dialing part (Fig. 5-1), emitter follower (Fig. 5-2) and signal tone test section (Fig. 5-3).Link to each other at the D point between 5-1 and the 5-2, link to each other at the E point between 5-2 and the 5-3.The P1.4 mouth of control unit is connected to the dialing part, is used for that control is plucked, on-hook and dialing, and the local network subscribers feeder is often opened contact J1-1 and linked to each other with 5-1 part bridge heap, links to each other with telephone set through normally-closed contact J1-2.5-2 partly is an emitter follower, and the output C of voice unit delivers to 5-1 part by the D point by the input of this unit C1 point after isolating.5-3 partly is the signal tone test section, the signal tone of the 450Hz of local network loopback is by E point input this part, and after amplification, filtering, phase-locked decoding circuit LM567 detects by audio frequency, and export the P1.2 mouth of control unit to by the 8th pin of LM567, judge for it whether phone is connected.

Power supply indicator LED1, alarm lamp LED2 and manual pull station K1, hand-reset button K2, warning/self check selector switch K3 are arranged on the panel of this telephone line autoalarm.Answer energized when waiting for, LED1 was bright when civil power was arranged, and LED1 extinguishes during power failure, by the nickel-cadmium cell automatic power.On-off switch K3 should be allocated to alarm condition, and the user can normally use telephone set.

The course of work is as follows:

During warning, press manual pull station K1, trigger element moves immediately, the relay J adhesive, and the phone automatic disconnection, this device inserts telephone wire.Simultaneously full machine each several part all obtains working power, starts working.At first LED2 is bright, and control unit takes out the telephone number of storage, by the high-low level of control P1.4 mouth, makes interface unit Outgoing Call number.The subscriber signal sound of interface unit demodulation local network switch loopback is immediately delivered to control unit for its judgement by the P1.2 mouth.If be busy tone, then control unit changes next number and repeats said process.If be ring-back tone, after then control unit is waited until the other side's off-hook, just send reproduction command to voice unit by P1.1 mouth, P1.3 mouth, P1.7 mouth, the recording of being put is served telephone wire by interface unit, passes to the other side.Behind about 30 seconds of the loop playback, control unit sends to voice unit by P1.1 mouth, P1.3 mouth, P1.7 mouth puts on-the-spot sound order.On-the-spot voice is picked up by microphone MIC1, delivers to the other side after amplifying, to judging field condition in view of the above.This machine automatic hand-up after 30 seconds changes next number and repeats said process, all puts through up to all storage numbers.After in the end a number is put through playback, will keep monitoring on-the-spot sound state until alarm release.

When a warnings/self check selector switch K3 was allocated to the self check state, this machine detected automatically whether number is correct, whether telephone wire connects well etc.In case take place unusually, LED2 can glimmer.

Claims

1, a kind of telephone line autoalarm, it is characterized in that: trigger element 2 connects control unit 3, control unit 3 connection interface unit 5, and reception interface unit 5 feedback signals; Control unit 3 also connects voice unit 4, and voice unit 4 connects control unit 5, and the end of interface unit 5 normally opened contact J1-1 links to each other with the local network subscribers feeder, and the end of normally-closed contact J1-2 links to each other with telephone set.

2, telephone line autoalarm according to claim 1, it is characterized in that: control unit 3 be by 8031 and memory U3, latch U4 constitute, under software cooperated, control unit is Outgoing Number successively, and the signal tone of energy reception interface unit feedback is also adjudicated.

3, telephone line autoalarm according to claim 1 is characterized in that: voice unit 4 is made up of speech processor UM5100, memory U8, analog switch U11, microphone amplifying circuit.

4, telephone line autoalarm according to claim 1, it is characterized in that: interface unit 5 is made of dialing part 5-1, emitter follower 5-2 and signal tone test section, and the signal tone test section utilizes the phase-locked decoder LM567 of audio frequency to finish detection.

5, telephone line autoalarm according to claim 1 is characterized in that: trigger element 2 is made up of power unit 2-1 and triggering part 2-2.