CN2127536Y

CN2127536Y - Microwave alarm telephone set

Info

Publication number: CN2127536Y
Application number: CN 92210910
Authority: CN
Inventors: 刘敬宏
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-15
Filing date: 1992-05-15
Publication date: 1993-02-24
Anticipated expiration: 2002-05-15

Abstract

The utility model relates to a microwave alarm telephone set. The utility model has the technical proposal that a microwave alarm device is added on the structure of an electronic telephone, and the microwave alarm device is mainly composed of a microwave probe which is composed of a high frequency triode, an adjustable condenser, a potentiometer and a whip antenna, a voltage comparator which is composed of an operational amplifier, a time delay amplifier, a control sound circuit which is composed of a music integration sheet, a controllable silicon and a relay. The alarm device is connected with the electronic telephone set, and the shell is provided with an alarm switch. The utility model has the advantage that the alarm telephone is placed at unmanned warning places. If a person enters, the utility model can automatically send out alarm signals to the telephone of a host and has a simple structure.

Description

Microwave alarm telephone set

The utility model belongs to a kind of telephone set, particularly a kind of microwave alarm telephone machine.

Along with the continuous development of communication career, no matter being constituent parts or family increases day by day to the demand of telephone set, therefore how to increase the function of use of telephone set, and the needs that satisfy the modernization life are people to one of problem of telephone plant research.At present, the someone develops antitheft alarm telephone device, mainly is to utilize between alarm, relay, single-chip microcomputer etc. and the telephone set to connect and compose, this antitheft alarm telephone device is complex structure not only, cost an arm and a leg, and install and use cumbersomely, can not accomplish a machine one.

The purpose of this utility model provides a kind of novel alarm telephone machine, except that function with ordinary telephone set, also have and be placed in unmanned important defendance place, office and the family, if there are improper personnel to enter, can send alarm signal from the phone of trend owner site, notify owner to take urgent measure, and simple in structure, be convenient to install and use.

The purpose of this utility model is achieved in that it is to have increased the microwave alarm device in the structure of existing electronic telephone, and the main points of its technical scheme are microwave to be housed monitor alarm switch on casing; And be provided with microwave alarm electronic circuit, in its circuit triode is arranged, the oscillating circuit that electric capacity constitutes, its output termination whip antenna, and be connected with the input of transistor amplifier with coupling capacitance by high frequency choke coil, the output of transistor amplifier connects the input of voltage comparator circuit, the diode of its output by serial connection extremely links to each other with two and the control of the silicon controlled that connects, one controllable silicon connects unit switch by relay, another controllable silicon is in parallel with the power supply forward by voltage stabilizing didoe and acoustics circuit integrated package power supply terminal forward serial connection back, and the input of delay circuit output forward serial connection diode and voltage comparator circuit joins; One group of switch of the output serial connection unit switch of acoustics circuit is connected in sending of electronic telephone circuit and talks about the loop; The normal opened contact of relay is parallel to the automatic redial key of electronic telephone circuit.

The utility model has the advantages that: telephone set is placed in important defendance place, office or the family, as long as stir the alarm switch on the lower casing when people leaves, telephone set promptly enters the state of alert, enters if any improper people, can send alarm signal from the phone of trend owner site, to take measures as early as possible, and simple in structure, existing electronic telephone structure is not done big change, be convenient to install and use, expense is few, popularizes easily.

Below in conjunction with accompanying drawing the utility model embodiment is described further.

Fig. 1 is the utility model face shaping schematic diagram.

Fig. 2 is a microwave alarm electronic circuit schematic diagram of the present utility model.

Fig. 3 is the coupling part schematic diagram of microwave alarm electronic circuit and electronic telephone circuit.

See Fig. 1, concrete structure of the present utility model is as follows: operation keys 3 is arranged on the electronic telephone casing 1, redial key 4 automatically 15 times, the side of casing 1 is equipped with the microwave of stirring and is monitored alarm switch 2.See Fig. 2, the electric principle of microwave alarm electronic circuit is as follows: form oscillating circuit by high-frequency triode BG1 and trimming capacitor C 2, the collector electrode of its output BG1 meets whip antenna T, and be connected with the input of triode amplifier BG2 with coupling capacitance C3 by high frequency choke coil L1, capacitor C 1 and resistance R 2 backs in parallel one termination power positive pole, the other end and high frequency choke coil L1 are series at the collector electrode of triode BG1.Adjustable potentiometer W1 is connected to the base stage of triode BG1, and is connected in series with resistance R 3, R4, and resistance R 1 is the emitter resistance of triode BG1.Resistance R 6 is the emitter resistance of triode BG2, and resistance R 5 is feedback resistances of BG2 input, and R7 is the collector resistance of BG2.Constitute voltage comparator circuit by resistance R 8, potentiometer W2, resistance R 9 with operational amplifier IC1, the collector electrode of the positive input termination triode BG2 of IC1, the output forward serial connection diode D2 of IC1; The negative input end of IC1 meets adjustable potentiometer W2, and resistance R 8, R9 are connected in series with W2; Control aural warning circuit is made up of relay J, controllable silicon SCR 1, SCR2, voltage stabilizing didoe D3, music integrated chip IC3 and unit switch K1-2, and controllable silicon SCR 1 is connected with diode D2 by series resistor R13, R14 respectively with the SCR2 control utmost point.SCR1 is connected in series relay J, and SCR2 is by the power supply terminal forward serial connection of voltage stabilizing didoe D3 and music integrated chip IC3.The working power positive pole of circuit meets unit switch K1-1, and negative pole meets unit switch K1-3.See shown in the I among Fig. 3 that the output Z of music integrated chip IC3 is connected in sending of telephone set by unit switch K1-2 and talks about the loop; Operational amplifier IC2, capacitor C 4, resistance R 10, R11, R12 form delay circuit, the contact that the positive input termination capacitor C 4 of operational amplifier IC2 is connected with resistance R 10; The contact that negative input end connecting resistance R11 connects with R12, output forward serial connection diode D1 is in the negative input end of IC1.See Fig. 3, the II place provides the signal that connects of relay J and electronic telephone circuit, and the III place provides the signal that connects of K1-4 with the electronic telephone circuit of unit switch.

Operation principle of the present utility model: when owner the time microwave on the casing 1 monitored alarm switch 2(unit switch K) dial and put the OFF position, the K1-1 of unit switch, K1-2, K1-3 disconnect, alarm circuit non-transformer is not worked, the K1-4 closure is done plain old telephone and is used, when owner leaves, microwave is monitored alarm switch 2(unit switch K) dial and put ON position, the operational amplifier IC2 output HIGH voltage of delay circuit, the operational amplifier IC1 of control voltage comparator circuit makes it be output as zero volt.After about one minute, owner leaves, the IC2 output LOW voltage, and IC1 enters normal operating conditions.High-frequency triode BG1 produces self-oscillation under the effect of trimming capacitor C 2 positive feedbacks, its frequency of oscillation can be regulated by potentiometer W1, tunable capacitor C2 between 400-600MHz.Whip antenna T arrives the space with electromagenetic wave radiation, in fence coverage, produce a microwave field, when the stranger enters microwave field, the reflected wave of human body all changes self-excitation amplitude and the frequency of high-frequency triode BG1 by whip antenna T, inductance L 1 is a high frequency choke coil, the variation of amplitude and frequency makes the fluctuation of A point voltage, fluctuation signal is coupled to through electrochemical capacitor C3 on the base stage of triode BG2 and amplifies, signal after the amplification is through the collector electrode output of triode BG2, deliver to operational amplifier IC1 and compare discriminating, under the unmanned situation, triode BG2 collector voltage is lower than the D point voltage of setting, operational amplifier IC1 output voltage is zero volt, otherwise operational amplifier IC1 output HIGH voltage triggers controllable silicon SCR 1, the SCR2 conducting, the relay J adhesive, its normal opened contact short circuit electronic telephone circuit redial key automatically 15 times, send number storing, music integrated chip IC3 obtains operating voltage and sends alarm signal.Because microwave monitors that alarm switch 2 places the ON position, alarm signal enters sending of telephone set through unit switch K1-2 and talks about the loop, by the on-site phone of phone line call owner and notify owner, and the electronic telephone of alarm is because unit switch K1-4 puts the ON position, loud speaker in the telephone set is not worked, and microwave field does not have phone and sends signal sound.

Claims

1, a kind of microwave alarm telephone machine comprises casing, movement and electronic telephone circuit, operation keys, automatic redial key, it is characterized in that: microwave is housed on casing monitors alarm switch; And be provided with microwave alarm electronic circuit, in its circuit triode is arranged, the oscillating circuit that electric capacity constitutes, its output termination whip antenna, and be connected with the input of transistor amplifier with coupling capacitance by high frequency choke coil, the output of transistor amplifier connects the input of voltage comparator circuit, the diode of its output by serial connection extremely links to each other with two and the control of the silicon controlled that connects, one controllable silicon connects unit switch by relay, another controllable silicon is in parallel with the power supply forward by voltage stabilizing didoe and acoustics circuit integrated package power supply terminal forward serial connection back, and the input of delay circuit output forward serial connection diode and voltage comparator circuit joins; One group of switch of the output serial connection unit switch of acoustics circuit is connected in sending of electronic telephone circuit and talks about the loop; The normal opened contact of relay is parallel to the automatic redial key of electronic telephone circuit.