CN2336414Y - Multifunctional remote control alarm - Google Patents

Abstract

A multifunctional remote-controlled alarm is composed of transmitter and receiver, the transmitter can be installed to the monitored object, and the receiver can be carried by the monitored person. When the transmitter changes its original state, can send the signal, the receiver can send the warning after receiving this signal promptly, its novel structure, small, installation convenient to use.

Description

A kind of multifunction remote-control alarm

The utility model is a kind of alarm, is particularly suitable for using in daily life.

Existing small-sized alarm has family expenses, automobile-used etc. dissimilar, and its shortcoming is that the purposes of each alarm is comparatively single, and the scope of application is little, uses inconvenience.

The purpose of this utility model is a kind of remote annunciator of many uses, easy to use of design.

The utility model comprises transmitter and receiver, it is characterized in that transmitter is to be made of oscillator and high frequency transmission circuit that gate circuit constitutes, receiver is to be made of superregenerative detection circuit, amplifying circuit, frequency selection circuit, trigger circuit and sound equipment generation or vibrating circuit.

The utility model novel structure, volume is little, installation, easy to use.Its sensing radiating portion can be installed on the monitored thing, and the wireless receiving part can be with the guardian at one's side.When monitored thing changed its original state, transmitter promptly can send signal, and receiver can send warning immediately.The utility model in use is not subjected to other radio wave interference, good reliability, operating distance is far away, it is of many uses, the function that possesses a tractor serves several purposes, can be used as the usefulness of the burglar alarm of vehicle, door and window or other valuables, also can be used for the network alarm of security department, can also when taking care of infant or patient, old man, use.

Below in conjunction with description of drawings embodiment of the present utility model.

Fig. 1 is the circuit theory diagrams of transmitter among the embodiment;

Fig. 2 is the circuit theory diagrams of receiver among the embodiment.

Among the embodiment, transmitter comprises by inverter F ₆, F ₇With crystal oscillator JT ₂The modulating wave free-running multivibrator that constitutes is connected to the shaping circuit that is made of "NOT" circuit at its output terminal, and by capacitor C ₁₀Be coupled to by triode VT ₅And inductance L ₂, capacitor C ₁₁, C ₁₂With antenna W ₂In the carrier oscillation circuit of forming.In the power circuit of oscillator, be connected with K switch ₃The receiver of present embodiment comprises by triode VT ₁With receiving antenna W ₁The superregenerative detection circuit of forming, at its output terminal by having by "NOT" circuit F ₁, F ₂, F ₃The amplifying circuit of forming, the output terminal of this amplifying circuit is connected on the input end of frequency selector.Said frequency selector is crystal oscillator JT ₁Output terminal at frequency selector is connected to by triode VT ₂, inverter F ₄, F ₅The trigger of forming, the output terminal of trigger are connected sound circuit or by triode VT ₄, in the vibrating circuit formed of Vib. M.In the sound and vibrating circuit, be connected with the change-over switch K of the control sound and vibration ₂Said sound circuit is by ic chip ₂, triode VT ₃Form with acoustical generator BL.

In the use, receiver power supply is in normally open.When transmitter is subjected to vibrating, the K switch in the circuit ₃Connect, circuit is started working, and the carrier wave after the modulation is passed through printed antenna W ₂To aerial emission.Crystal oscillator JT in the utility model transmitter ₂With the crystal oscillator JT in the receiver ₁Frequency be corresponding.Receiving antenna W in receiver ₁After receiving the electromagnetic wave that transmitter sends, through triode VT ₁The detection demodulation is then through resistance R ₂, capacitor C ₇Be coupled to by inverter F ₁, F ₂, F ₃In the amplification and rectification circuit that constitutes, if its signal frequency and crystal oscillator JT ₁Resonance, then its impedance is very low, thereby enters triode VT smoothly ₂, then can't pass through because impedance is very high to other interference noises.Enter into triode VT ₂Signal through amplifying by inverter F ₄, F ₅Trigger acoustics circuit IC after the shaping ₂Or Vib., thereby send chimes of doom or produce vibration to notify the guardian.The operating distance of present embodiment 〉=30 meter, if increase antenna, operating distance can be multiplied.

Claims (4)

1, a kind of multifunction remote-control alarm, comprise transmitter and receiver, it is characterized in that transmitter is to be made of oscillator and high frequency transmission circuit that gate circuit constitutes, receiver is to be made of superregenerative detection circuit, amplifying circuit, frequency selection circuit, trigger circuit and sound equipment generation or vibrating circuit.

2,, it is characterized in that transmitter comprises by inverter F according to the described remote annunciator of claim 1 ₆, F ₇With crystal oscillator JT ₂The modulating wave free-running multivibrator that constitutes is connected to the shaping circuit that is made of "NOT" circuit at its output terminal, and by capacitor C ₁₀Be coupled to by triode VT ₅And inductance L ₂, capacitor C ₁₁, C ₁₂With antenna W ₂In the carrier oscillation circuit of forming, in the power circuit of oscillator, be connected with K switch ₃Receiver comprises by triode VT ₁With receiving antenna W ₁The superregenerative detection circuit of forming is connected to by "NOT" circuit F at its output terminal ₁, F ₂, F ₃The amplifying circuit of forming, the output terminal of this amplifying circuit is connected on the input end of frequency selector, is connected to by triode VT at the output terminal of frequency selector ₂, inverter F ₄, F ₅The trigger of forming, the output terminal of trigger are connected sound circuit or by triode VT ₄, in the vibrating circuit formed of Vib. M, in the sound and vibrating circuit, be connected with the change-over switch K of the control sound and vibration ₂

3,, it is characterized in that said sound circuit is by ic chip according to claim 1 or 2 described remote annunciators ₂, triode VT ₃Form with acoustical generator BL.

4,, it is characterized in that said frequency selector is crystal oscillator JT according to claim 1 or 2 described remote annunciators ₁

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