CN2220138Y

CN2220138Y - Radio alarm for thing mislaid

Info

Publication number: CN2220138Y
Application number: CN94218963U
Authority: CN
Inventors: 孙毅
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-26
Filing date: 1994-08-26
Publication date: 1996-02-14
Anticipated expiration: 2004-08-26

Abstract

The utility model relates to an alarm for lost things, which comprises a transmitting device composed of a radio-frequency transmitting circuit and a coding integrated circuit, and a receiving device composed of a super-regenerative detection circuit, a pulse amplifying circuit, a demoding circuit, a triggering circuit, an acoustic and optical alarm circuit and an oscillating alarm circuit. The utility model is mainly used for alarm and reminding for preventing things from being stolen, lost and forgotten and preventing children from being lost. Because the utility model has the advantages of small volume, portability and no limitation of the sizes of bags, packages and boxes, the utility model can also be used as an energy saving flashlight.

Description

Radio remains alarm

The utility model belongs to a kind of radio system that is used to report to the police.

When people go on business, travel or carry child when going into the street, belongings, luggage may pass into silence or lose, child wanders away sometimes, in order to address this problem, people have done multiple effort such as No. 90206691 disclosed devices that are called " miniature apart from reminiscences " of Chinese patent, have to make article Antistealing, the anti-purposes of forgeing, and mainly are applicable to the on a business trip or work of going out of people; Also can be used as old people's air defense forgets, the anti-lost warning reminding of child is used, but this device has a defective, does not promptly have recognition function, when two people go on business, all the remains alarm of producing with same producer prevents that them from institute's belongings losing, because this alarm do not have recognition function, unless two people's article lose simultaneously, otherwise when two people apart from very near the time, wherein a people article pass into silence or lose, and alarm does not but go to report to the police.In addition, the power supply of said apparatus must adopt 4.5～9.0 volts of voltages, and not only volume is big, and the consumption electric energy is many, gives to carry and also brings difficulty.

Task of the present utility model is: design a kind of have recognition function and power consumptive province, little, the portable radio remains of volume alarm.

Task of the present utility model realizes as follows; Alarm is made up of emitter and receiving system, emitter is made of integrated circuit of digital coding and radio-frequency transmissions circuit, and receiving system is made of superregenerative detection circuit, pulse amplifying circuit, decoding circuit, circuits for triggering, third contact of a total solar or lunar eclipse warning circuit and vibration alarming circuit.

The utility model makes alarm possess recognition function, the unfailing performance height because emitter adopts the integrated circuit of digital coding like this;

Thereby avoided in the time of false alarm, disturbing other people phenomenon to take place owing to adopt the version of vibration alarming.

The utility model is not because the variation that structurally can guarantee supply voltage produces the frequency deviation phenomenon, and emission and receiving system all adopt the printing annulus wireless, therefore has, volume is little, characteristics such as non-directional;

The utility model is emitting radio frequency signal on the UHF section, and adopts little power consumption emission, and is so wave radiation power is minimum, minimum to the interference of television set, broadcast receiver etc.;

Because receiving circuit is provided with far and near Cheng Kaiguan, can effectively be arranged to closely or long-distance alarm in the scope of application as required like this.

Because the light-emitting diode of super brightness is housed in receiver, but make this receiver double as flashlight use like this, and the light-emitting diode power consumption is littler a lot of times than ordinary incandescent lamp, and luminosity can meet the demands in closely, so this device also can be used as the energy-saving flashlight use;

Fig. 1 is the utility model emitter circuit theory diagrams;

Fig. 2 is the utility model receiving system circuit theory diagrams;

A most preferred embodiment of the present utility model as Fig. 1, is equipped with the integrated IC circuit of digital coding on the circuit of existing emitter, present embodiment is selected VD5026 for use, and this circuit can be compiled out the up to a million groups of codings that have nothing in common with each other as required, and R is passed through in coded pulse ₁The radio-frequency oscillator that modulation is made up of BG etc., L ₁, C ₃, C ₄, C ₅Form resonant tank, be tuned in about 450MHZ L ₁Play simultaneously the effect of transmitting antenna again.All resistance all adopts the fixed carbon resister of 1/16W.Receiving system as shown in Figure 2, BG ₁Deng constituting the superregenerative detection circuit, be used to receive the coded radio frequency signal that sends by transmitter.BG ₂, BG ₃Deng constituting two pole tensions negative feedback low frequency amplifier in parallel, after being amplified, the coded pulse after the detection delivers to by BG ₄Deng the pulse shaper of forming, after shaping, deliver to IC again ₁Input.IC ₁Select for use VD5028 be with transmitter in the corresponding decoding integrated circuit of coding integrated circuit, as the signal of receiving is the corresponding with it coded pulse that transmitter sent, then at its output output high level.As the signal strength signal intensity that is not or receives output low level then inadequately.BG ₉With LED ₁Deng forming luminous warning circuit, work as IC ₁When being output as high level, BG ₉End LED ₁The expression of going out is on the alert, on the contrary then luminous warning.BG ₅, BG ₆, IC ₂And SP etc. forms wherein IC of sound light alarming circuit ₂Selecting KD9301 for use is a special-purpose warning sound-producing integrated circuit, works as IC ₁When output is high level, BG ₅Ground level and emitter are in cut-off state by short circuit, and the noiseless expression of SP is on the alert, otherwise, IC ₂The chimes of doom that produces is by BG ₆Amplify rear drive SP and send enough loud sound, BG ₇, BG ₈Reach composition vibration alarming circuit such as motor M, its principle is identical with the principle of audible alarm circuit.LED ₂, LED ₃Be two superhigh brightness LEDs, use as flashlight lighting.

Claims

1, a kind of radio remains alarm, it comprises the emitter that is made of the radio-frequency transmissions circuit, by the superregenerative detection circuit, pulse amplifying circuit, decoding circuit, circuits for triggering, the receiving system that third contact of a total solar or lunar eclipse warning circuit constitutes, of the present utility model being characterised in that: be connected with the integrated circuit of digital coding on the radio-frequency transmissions circuit of emitter, on the circuit of receiving system, connect digital decoding integrated circuit and reach by BG ₇, BG ₈, the vibration alarming circuit formed of motor M.