CN2225703Y

CN2225703Y - Warning device

Info

Publication number: CN2225703Y
Application number: CN 94211661
Authority: CN
Inventors: 李旋
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-24
Filing date: 1994-05-24
Publication date: 1996-04-24
Anticipated expiration: 2004-05-24

Abstract

The utility model relates to a warning device which is composed of an emitter, a receiver and an alarm. The warning device is characterized in that the emitter adopts an integrated circuit KD 9561 as the signal source, an integrated circuit BA 1404 modulates and emits audio, the signal receiving circuit of the receiver mainly adopts an integrated circuit TDA7021T, the alarm adopts a BP machine and is made into the size of a No. 5 battery, and the receiver is arranged in the BP machine. The BP machine has the usual functions of the wireless pagers. In addition, the BP machine can also be used as the alarm of the warning devices for reminding the valuables. As the BP machine can be carried on bodies, when the utility model is used as the alarm, the function of the BP machine can be exerted, and the object is not separated from the bodies.

Description

A kind of warning device

The utility model belongs to a kind of warning device, particularly is used for warning that article are forgotten.

Handbag, suitcase that valuables such as cash, check, data, file, voucher, certificate are housed that someone carries take place and forget somewhere in regular meeting in public; or stolen incident; cause unnecessary loss to the litigant, even cause the serious consequence that to retrieve for individual and country.Some antitheft case and bag are also arranged in the market, and its principle is to put a transmitter in antitheft case and bag, and is with a receiver to report to the police at one's side, can send chimes of doom when entrained case and bag leave owner's certain distance.This warning device is exactly obviously to be inconvenient with the condiment of a special use, if leave behind receiver, then warning device is ineffective.

The purpose of this utility model provides a kind of radio pager (hereinafter to be referred as beeper) that utilizes to have and carry itself as alarm, then need not the special-purpose alarm of band in addition.

The utility model is made up of transmitter 1, receiver 2 and alarm 3, it is characterized in that alarm 3 is to adopt beeper, the contour structures of receiver 2 is made identical with No.5 cell, receiver 2 is contained in the No.5 cell box of beeper, the signal receiving circuit of receiver 2 mainly is to adopt integrated circuit TDA7021T, and input signal passes through capacitor C ₂₁Receive 12 pin of integrated circuit TDA7021T, receive by C by the output of 14 pin ₃₂, C ₃₃, D ₂, D ₃The voltage doubling rectifing circuit of forming is input to by transistor Q again ₁, Q ₂The two-stage amplifier of forming is at Q ₂Collector meet a diode D ₄, diode D ₄Positive pole connects the battery anode, transistor Q ₂Emitter connect battery negative terminal; Transmitter 1 adopts integrated circuit KD9561 as signal source, produces the audio control signal of 0.3-3.7KHz, and BA1404 serves as voice modulation and emission by frequency modulation wireless transmit special IC, and signal source is passed through C ₁, C ₂From about two road direction integrated circuit BA1404 be the input of 1 pin and 18 pin, by the output of 7 pin, via L ₂, C ₁₂Outwards emission after the series resonant network frequency-selecting of forming.

The functional-block diagram of transmitter 1 and receiver 2 is seen Fig. 1.

Transmitter 1 schematic diagram is seen Fig. 2.Integrated circuit KD9561 makes signal source, is used to produce the audio control signal of 0.3-2.7KHz.Serve as the voice modulation emission by frequency modulation wireless transmit special IC BA1404, there is the two-way prime amplifier BA1404 inside, balanced modulator, buffer amplifier, frequency divider, radio frequency amplifier, circuit such as 100MHz vibration.Sound signal is passed through C ₁, C ₂Enter 18 pin and 1 pin of integrated circuit BA1404, the balance of regulating left and right sides two paths of signals with potentiometer W simultaneously from left and right sides two-way.Impact damper through BA1404 inside amplifies, and modulates mutually with the 100MHz CF signal again, forms radio-frequency (RF) control signal.Varactor D ₁Be used for improving the frequency stability of carrier signal.Radiofrequency signal is amplified by the power amplifier of BA1404 inside, again by L ₂, C ₁₂Outwards emission after the series resonant network frequency-selecting of forming, it can carry out remote control with interior receiver to 20 meters.

Receiver 2 schematic diagrams are seen Fig. 3, after the radio-frequency (RF) control signal that transmitter 1 sends is placed on 2 receptions of the interior receiver of beeper battery case, by coupling capacitance C ₂₁Send into FM and receive special IC TDA7021T.Because TDA7021T adopts the RC frequency selection network, the Therefore, omited I.F.T., peripheral cell is also less.Radiofrequency signal is at first passed through inner mixing, produces intermediate-freuqncy signal, again it is carried out filtering, amplitude limit, phase discrimination processing, is transformed into audio control signal, and this signal amplifies the 14 ends output of back from TDA7021T through audio power, by C ₃₂, C ₃₃, D ₂, D ₃The voltage doubling rectifing circuit of forming is carried out voltage multiplying rectifier and filtering to it, forms direct-current control voltage.When transmitter 1 and receiver 2 at a distance of in 20 meters the time, this control voltage is enough to make first transistor Q ₁Conducting, second pipe Q ₂End, make the direct current supply voltage of beeper more than 1.25V, the work of paging normally this moment.And when transmitter 1 and receiver 2 when surpassing 20 meters, this control voltage descends, transistor Q ₁End second transistor Q ₂Conducting is limited in about 1.2V the direct current supply voltage of beeper, and beeper sends continuous sound at once, notifies owner's article to pass into silence or stolen, so that in time recover.

The beeper that alarm 3 is adopted must be the machine with undervoltage warning, and the beeper that has has only under-voltage demonstration and do not have undervoltage warning, and this beeper can not in time remind owner to forget case and bag, obviously is not suitable for using.Battery in the receiver 2 to 1.2V, also can send continuous sound as power consumption in addition, and this is a kind of normal undervoltage warning, but not case and bag are forgotten warning.If the power switch of transmitter 1 is opened, the still continuous sound of beeper can be judged as normal undervoltage warning.

Receiver 2 of the present utility model is made battery forms, and is easy to loading and unloading, adopts beeper to report to the police, and needn't increase alarm in addition, and the thing that beeper system is with oneself can not influence normal paging function from body yet, if need not report to the police,, change general battery and get final product as long as receiver 2 is taken out.At present, the people who has beeper is numerous day by day, and the people who has a beeper is the people with valuables of going out frequently and often, and undoubtedly, the owner of beeper is consistent with valuables being forgotten requirement reports to the police, and therefore, the market of this warning device is optimistic.

Description of drawings:

Fig. 1 is a theory diagram of the present utility model.

Fig. 2 is a transmitter electrical schematic diagram of the present utility model.

Fig. 3 is a receiver electrical schematic diagram of the present utility model.

Embodiment:

The beeper that the utility model adopts is Panasonic's 2076 types.

The component parameter of transmitter 1 and receiver 2 or model all are labeled on Fig. 2 and Fig. 3.Now the annexation of transmitter 1 with alarm 2 main electronic devices and components is described as follows with Fig. 3 in conjunction with Fig. 2: it is that 1 pin and 18 pin pass through capacitor C respectively that the pin of the integrated circuit BA1404 of transmitter 1 is connected ₂And C ₁Receive IC ₁, 2 pin and 4 pin pass through capacitor C ₃And C ₄Ground connection, 3 pin and 8 pin ground connection, crystal oscillator JT and capacitor C ₇Connect 5 pin and 6 pin after the series connection, 7 pin pass through L ₂And C ₁₂Series resonant network and the capacitor C formed ₁₄And C ₁₅Ground connection, 7 pin pass through capacitor C simultaneously ₁₆Antenna is penetrated in sending and receiving, and 9 pin and 10 pin also connect capacitor C ₁₁Two ends and pass through C by 10 pin ₁₀Connect power positive end, 11 pin pass through R ₃, C ₈, L ₁Connect power positive end, diode D ₁With C ₈And L ₁Two ends parallel connection after the series connection, 13 pin pass through R ₂, C ₆And 14 pin pass through R ₁, C ₅The back joins with 12 pin, 15 pin with connect power positive end after potentiometer W movable end links to each other, 16 pin and 17 pin also connect the two ends of potentiometer W.The shell sizes of transmitter 1 is close with the beeper size, and components and parts are installed on the printed panel, and printed panel is fixed on the casing.The connection that the FM of receiver 2 receives special circuit TDA7021T is that 1 pin, 2 pin, 6 pin pass through C respectively ₂₆, C ₂₇, C ₂₉Connect power positive end, 3 pin ground connection, 4 pin connect power positive end and pass through C ₃₁Ground connection, 5 pin are by L, C ₂₈Parallel circuit connects power positive end, and 7 pin and 8 pin also meet C ₃₁And 7 pin pass through C ₃₀Connect power positive end, 10 pin and 11 pin also meet C ₂₅, 12 pin pass through C ₂₁Receive receiving antenna, 13 pin and 16 pin pass through C respectively ₂₄And C ₂₂Ground connection, 14 pin and 15 pin also meet C ₂₃Back 14 pin are received by C ₃₂, C ₃₃, D ₂, D ₃The voltage doubling rectifing circuit of forming is input to behind the voltage multiplying rectifier by transistor Q ₁And Q ₂The secondary common-emitter amplifier of forming, Q ₂Integrated electrode meet diode D ₄Negative pole, D ₄Positive pole connect power positive end.The external form of receiver 2 is made big or small identical with No.5 cell.Use epoxy encapsulation on circuit part's packing printed panel of receiver 2.Battery in the receiver 2 is integrated into an electric battery with the parallel connection of 4 1.5V button cells, can load onto or unload from receiver 2 easily.During use receiver 2 packed in the battery case of beeper, carry, transmitter 1 is placed in the article that need to report to the police, and as case, bag etc., transmitter 1 and receiver 2 the two distance surpass 20 meters, and beeper is reported to the police.

Claims

1, a kind of warning device of being made up of transmitter 1, receiver 2 and alarm 3 is characterized in that alarm (3) is to adopt radio pager (beeper); The signal receiving circuit of receiver (2) mainly is to adopt integrated circuit TDA7021T, and input signal passes through capacitor C ₂₁Receive 12 pin of integrated circuit TDA7021T,, receive by C by the output of 14 pin ₃₂, C ₃₃, D ₂, D ₃The voltage doubling rectifing circuit of forming is input to by transistor Q again ₁, Q ₂The two-stage amplifier of forming is at Q ₂Collector meet a diode D ₄, diode D ₄Positive pole connects the battery anode, transistor Q ₂Emitter connect battery negative terminal; Transmitter (1) adopts integrated circuit KD9561 as signal source, produces the audio control signal of 0.3～2.7KHz, and BA1404 serves as voice modulation and emission by frequency modulation wireless transmit special IC, and signal source is passed through C ₁, C ₂From about 1 pin of two road direction integrated circuit BA1404 and the input of 18 pin, by the output of 7 pin, via L ₂, C ₁₂Outwards emission after the series resonant network frequency-selecting of forming.

2, warning device according to claim 1 is characterized in that its circuit part epoxy encapsulation of said receiver (2); Battery is with the parallel connection of 4 1.5V button cells.