CN2190386Y - Telephone alarm - Google Patents

Abstract

The utility model provides a telephone alarm, relating to microprocessor technique and wired communication technique. The utility model is characterized in that the telephone alarm uses a chip microprocessor as a core control element, and is matched with the following peripheral circuits: an infrared detector, a telephone dial circuit, a telephone dial receiving circuit, a voice circuit and a warning start-up circuit. The utility model realizes the functions of automatic supervision, password reception, off-hook simulation, dialing, calling and on-hook.

Description

Telephone alarm

The utility model belongs to a kind of telephone alarm device, and it relates to microprocessor technology and wire communication technology.

At present domestic have many kinds of telephone alarms, but there is following deficiency in they:

1, with some switch activated warning system of hiding, it is big to fail to report possibility.

2, stop reporting to the police with certain user known button or switch, this secret is grasped by other people easily.

The purpose of this utility model is to design a kind of telephone alarm device, and it can overcome above-mentioned shortcoming effectively, and it is convenient, reliable that telephone alarm is used.

Operation principle of the present utility model is summarized as follows:

With chip microprocessor as the core control element; after chip microprocessor receives signal on the Infrared Detectors; it is being gathered the subscriber dialing signal on the dialing receiving circuit under the control of its program immediately; when the number that collects is consistent with the shutdown number that sets in advance; chip microprocessor is hard stop (put himself in power-down state, at this moment the clock of chip microprocessor quits work) then.If the telephone number that collects and the shutdown number that sets in advance are inconsistent or when not collecting dialing signal within the regular hour; chip microprocessor at first makes the relay adhesive; to this telephone alarm, normally closed contact then disconnects telephone wire and telephone set the normal opened contact of relay telephone line.Then chip microprocessor sends telephone number data according to the telephone number that presets to dial-up circuit, and dial-up circuit is delivered to dialing signal on the telephone wire; After dialing was finished, chip microprocessor started speech chip, and at this moment speech chip is delivered to voice signal on the telephone wire by the call voice interface integrated circuit; After the regular hour postponed, chip microprocessor was simulated on-hook automatically, and according to the telephone number that the next one presets, repeated said process, until having dialled whole telephone numbers that the user sets.

Chip microprocessor is to differentiate according to the height of the level on the one input pin for the identification of DTMF pulsing system and pulse dialing system, will carry out different programs for different dial system chip microprocessors.

Concrete use of the present utility model is such: the user at first presses reset key (S1 in the accompanying drawing 2) in use, and must leave within official hour and be monitored the zone, at this moment between after system enter monitored state; When the user gets back to when being monitored the zone once more; machine must pick up the telephone in official hour; dialled the shutdown number that presets (in order not influence the operate as normal of telephone exchange; the figure place of shutting down number must be less than the figure place of local exchange telephone number; and can not use special number, as: 110,119 etc.).If the user will start distress call, then as long as after system reset, press reset key once more.

Now be described in detail as follows with reference to the accompanying drawings:

Fig. 1 is that dialing, dialed number receive and call voice interface principle circuit diagram.

Fig. 2 is chip microprocessor circuit, state of alert start-up circuit and sound circuit figure.

Fig. 3 is the detector basic circuit diagram.

L1, L2 are outer telephone wire tie points among Fig. 1.B1 is subsets.B2 is a rectifier bridge, its effect be guarantee this telephone alarm and telephone wire to be connected polarity correct.J1 is a dpdt relay, and it is used for the connection of conversion telephone wire.D4 is the driving triode of J1, and the base stage of D4 is connected to the P13 pin of chip microprocessor among Fig. 2.D1, D2 are the triodes of control telephone wire break-make when being used for pulse dialing, D1 adopts 2N5401 in the utility model, D2 adopts 2N5551, and R1, R2, R3 are the biasing resistors of D1, D2, and R1, R2, R3, D1, D2 constitute pulse dialing interface circuit of the present utility model.U8 is pulse dialing and DTMF pulsing compatible signal generation integrated circuit, and the base stage of D2 is received the pulse dialing output pin DP of U8, and when DTMF pulsing, this pin is kept high level.The touch-tone signal output pin of U8 is received the touch-tone signal input pin TI of call voice interface integrated circuit U6, and signal is delivered on the telephone wire by the dual-tone multifrequency interface circuit of U6, C1 is filter capacitor on the telephone wire, and its value is 0.01 μ F.D3 is that voltage stabilizing didoe is used in protection, and that use in the utility model is 1N4742, and U6 uses MC34014 in the utility model, and U8 uses HA91531.The data input of U8 is connected to the data/address bus D-BUS of chip microprocessor among Fig. 2, dual-tone multifrequency receiving integrate circuit U7 and capacitor C 2 are formed the DTMF pulsing receiving circuit, DV is the specified data indication end, it is an effective signal of high level, and the DV pin is received the INT1 pin of chip microprocessor by a not gate U9:A.The IN pin of U7 is the dual-tone multifrequency input pin, and the touch-tone signal on the telephone wire is delivered to by C2 on the IN pin of U7, and the data/address bus D-BUS of chip microprocessor is received in the output of the data of U7.Resistance R 4, R5, R6, R7 and voltage comparator A1 constitute the pulse dialing level shifting circuit, positive supply VCC and R6, R7 provide reference voltage for A1, voltage on the telephone wire through R4, R5 voltage after partial and reference voltage relatively, make A1 in the make and break process of pulse dialing, export low high level respectively, this output pin is received the P12 pin of chip microprocessor, chip microprocessor then changes according to the height of level on this pin, reads the pulse dialing number.The V+ pin of call voice interface integrated circuit U6 is received the telephone wire positive pole, V-ground connection, TXI is the language input pin of U6, it links to each other with Z1 contact among Fig. 2, the dial mode of U6 selects the dial mode of input pin MS and U8 to select input pin MS to receive the P16 pin of chip microprocessor U1 among Fig. 2, and being used for selecting is pulse dialing or DTMF pulsing.The squelch control input MT of U6 receives the P10 pin of U1.

U1 is a chip microprocessor among Fig. 2, U2 is a slice address latch, U3 is a slice data storage, U4 is by the converter of digital signal to analog signal, they select 80C51,74HC373,27C512 respectively for use, DAC0832, the Z1 contact of analog signal output in amplifier A4 and capacitor C 3 to Fig. 1 of U4.Switch S 2 is pulse/DTMF pulsing system selector switch, and when S2 disconnected, the P16 pin of U1 connect high level, in the utility model corresponding to the pulse dialing system; When S2 connected, the P16 pin of U1 connect low level, corresponding to the DTMF pulsing system; R8, R9 are two resistors.Button S1, phase inverter U9:C, U9:D, U9:B and NAND gate U5:A, U5:C form state of alert start-up circuit; Before chip microprocessor enters the power down operations mode, at first put P17 in high level, and rearmounted himself in the power down operations mode.Reset signal on the button S1 just can arrive the reset pin of chip microprocessor (for 80C51 by U5:A and U9:D like this, high level is effective), chip microprocessor resets rearmounted P17 in low level, signal on the reset key S1 can not pass through U5:A at this moment, and turn to U5:C to P15 pin, when promptly entering the emergency alarm state after the P15 pin collects low level signal, chip microprocessor (promptly simulates off-hook immediately, dialing, call out on-hook etc.).

Fig. 3 is this detector schematic diagram, B3 is a pyroelectric detector that carries technotron, VCC is a positive supply, and R10 is a resistor, and A2 is an operational amplifier, A3 is a voltage comparator, the effect of A3 is signal shaping, resistance R 11, and R12 forms a resistor voltage divider circuit, for voltage comparator provides reference voltage, the INT0 that the output signal of A3 is received U1 among Fig. 2 interrupts input pin.

Principal character of the present utility model is:

1, when chip microprocessor is in monitored state, it is operated in the standby mode, the output signal of Infrared Detectors is received one of chip microprocessor and is interrupted input pin, detects the someone at Infrared Detectors and enters and send interrupt signal to microprocessor immediately after being monitored the zone.

2,, and convert thereof into the data message that chip microprocessor can be accepted with the dialing signal on the dialing receiving circuit reception telephone transmission line.

3, produce dialing signal, improve reliability with a dual-tone multifrequency/pulse compatible telephone dialing integrated circuit.

4, after chip microprocessor receives halt command, at first send certain level signal to reset control circuit, make and press the back chip microprocessor at button S1 and can reset, and rearmounted himself in the power down operations mode.The user presses the S1 key chip microprocessor will be resetted after this, and then chip microprocessor sends signal, forbids resetting taking place once more, if S1 is pressed again, chip microprocessor is carried out the emergency alarm program immediately.

Advantage of the present utility model is:

1, the chip microprocessor long-term work is in the standby or the power down operations mode of low-power consumption, and power consumption is little.

2, have dual-tone multifrequency and pulse dialing receiving function, the user can send order by telephone set to chip microprocessor in the mode of password.

3, has the distress call function.

Technical characterictic of the present utility model is that its chief component comprises:

1, chip microprocessor U1(80C51), it has the I/O(input and output) port, interrupt input pin outward, can work in standby and power-down mode;

Voice signal produces circuit: it is by language data memory U3(27C512), language chip U4(DAC0832) and call voice interface integrated circuit U6(MC34014) form; Also be integrated with the DTMF pulsing interface circuit on the MC34014 chip;

A subsets B1;

The utility model also comprises following part: a dialing receiving circuit, dial the number on telephone set in order to receive and to discern the user; A telephone dialer circuit is in order to realize simulation off-hook, dialing, on-hook function when merit takes place; A start-up circuit that starts the state of alert; An Infrared Detectors is in order to the infrared radiation signal that receives human body and convert signal of telecommunication output to.

2, dialing receiving circuit: it comprises a touch-tone signal receiving integrate circuit U7 and impulse level change-over circuit; U7 is used to receive the DTMF pulsing on the telephone transmission line, and the impulse level change-over circuit then is used to receive the pulse dialing on the telephone transmission line.

3, impulse level change-over circuit: it is formed by voltage comparator A1 with by the resitstance voltage divider that resistance R 4, R5 form, and the output signal of A1 is received the I/O port (P12) of U1.

4, telephone dialer circuit: it dials integrated circuit U 8, pulse dialing interface circuit by pulse/dual-tone multifrequency compatible telephone and the DTMF pulsing interface circuit that is integrated on the call voice interface circuit U6 is formed.

5, pulse dialing interface circuit: it is made up of transistor D1, D2 and biasing resistor R1, R2, R3; When adding high level in the base stage of D2, the D2 conducting, in resistance R 1, under the effect of R2, the base potential of D1 makes the D1 conducting less than the emitter current potential, and telephone line is in conducting state; When adding low level in the base stage of D2, D2 ends, and this moment, no current flow through resistance R 1, R2, and potential difference is zero between the base stage of D1 and emitter, and D1 ends, and telephone line is in the state of blocking.

6, state of alert start-up circuit: NAND gate circuit U5:A, U5:C and not circuit (phase inverter) U9:B, U9:C, U9:D form control circuit, and control circuit and button S1 form state of alert start-up circuit; Control circuit has two signal output parts, and one outputs to the reset pin (RESET) of U1 from the output pin of U9:D, and its two output pin from U5:C outputs to the I/O port P15 of U1; When the P17 pin of U1 is exported high level, button S1 presses the back control circuit and sends reset signal to U1, and when the P17 of U1 pin output low level, press the back control circuit at button S1 and send a low level signal to the P15 of U1 pin, U1 promptly enters the emergency alarm state after collecting low level signal on the P15 pin.

7, Infrared Detectors: it is by pyroelectricity element B3, signal amplifier A2, and voltage comparator A3 forms; The output signal of A3 has only the high-low level two states, and it is a signal shaping element, and the output signal of A3 is received the INT0 pin of U1.

Claims (7)

1, a kind of telephone alarm, it comprises: one has I/O (I/O) port, interrupts the chip microprocessor of input pin and standby and power down operations mode outward; One by the language data memory, and the voice signal that language chip and call voice interface integrated circuit are formed produces circuit; Wherein also have the DTMF pulsing interface circuit on the language interface integrated circuit, (for example MC34014); Subsets; Described telephone alarm is characterised in that and also comprises a dialing receiving circuit, dials the number on telephone set in order to receive and to discern the user; A telephone dialer circuit is in order to realize simulation off-hook, dialing, on-hook function when merit takes place; A start-up circuit that starts the state of alert; An Infrared Detectors is used to receive the infrared radiation signal of human body and converts the signal of telecommunication to and output.

2, telephone alarm according to claim 1, it is characterized in that described dialing receiving circuit comprises a touch-tone signal receiving integrate circuit and impulse level change-over circuit, they are respectively applied for DTMF pulsing and the pulse dialing that receives on the telephone transmission line.

3, according to claim 1 and the described telephone alarm of claim 2, it is characterized in that described impulse level change-over circuit comprises a resitstance voltage divider and a voltage comparator, the output signal of voltage comparator is connected to an input port of chip microprocessor.

4, telephone alarm according to claim 1 is characterized in that described telephone dialer circuit comprises a pulse/dual-tone multifrequency compatible telephone dialing integrated circuit, pulse dialing interface circuit and is integrated in DTMF pulsing interface circuit on the call voice interface integrated circuit.

5,, it is characterized in that described pulse dialing interface circuit is meant the switching circuit of the control telephone line break-make of being made up of two transistors and biasing resistor thereof according to claim 1 and the described telephone alarm of claim 4.

6, telephone alarm according to claim 1, it is characterized in that described state of alert start-up circuit comprises a button and the control circuit of being made up of logic gates, this control circuit has two outputs, one is used for sending reset signal to single chip microcomputer, another then is used for sending emergency message by an input pin of chip microprocessor to it, and control circuit is pressed the back at button and is sent which kind of signal to chip microprocessor, then by the output level control of an I/O port of chip microprocessor.

7, telephone alarm according to claim 1, it is characterized in that described Infrared Detectors is made up of pyroelectricity element, signal amplifier and signal shaping element, the output signal of Infrared Detectors is received one of chip microprocessor and is interrupted input pin, detects the someone at Infrared Detectors and enters and send interrupt signal to microprocessor immediately after being monitored the zone.

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