CN1450502A

CN1450502A - Intelligent theft-proof door bell

Info

Publication number: CN1450502A
Application number: CN 02110260
Authority: CN
Inventors: 何志雄
Original assignee: XIAMEN NANFU TRADE CO Ltd
Current assignee: XIAMEN NANFU TRADE CO Ltd
Priority date: 2002-04-07
Filing date: 2002-04-07
Publication date: 2003-10-22

Abstract

The invention discloses a kind of intelligent theft-proof door bell, it uses single-chip as the signal identifying and processing centre, the invention can distinguish the knock sound through programming and send out the bell sound. It can also distinguish abnormal movement and shock, then sends out alarm. It realizes the bell and the theft-proof alarm. It simplifies the circuit by using single chip, and enhances the stability and accuracy of the product.

Description

Intelligent theft-proof door bell

Technical field

The present invention relates to a kind of door and window that is applicable to, but and the intelligent theft-proof door bell of double as doorbell.

Background technology

Existing door and window alarm and doorbell all separate, and function singleness simple in structure.The more complete alarm of function is complex circuit then, is difficult for maintenance.

Summary of the invention

The present invention is directed to the deficiency of existing alarm and doorbell, propose a kind of use single-chip microcomputer, by programming, realize the theft-proof door bell of doorbell and the two unification of alarm, and do not need bell button is being set outdoors, only need knock at the door and to trigger doorbell, remove the trouble that the guest seeks bell button from.

The technical solution adopted for the present invention to solve the technical problems is: intelligent theft-proof door bell of the present invention comprises displacement/vibration signal amplifying circuit, warning circuit, inductor and hummer, and described displacement/vibration signal amplification circuit output end is connected with single-chip microcomputer with the warning circuit input end; Import single-chip microcomputer in advance according to the identification signal that normal switch door time and displacement/vibrations are set, open the displacement/vibration signal of generation at closing time behind amplifying circuit input single-chip microcomputer when inductor is detected, single-chip microcomputer is discerned, if differ from the identification signal of pre-input, then single-chip microcomputer sends alerting signal to warning circuit, triggers the alarm sound of hummer; Import single-chip microcomputer in advance according to the identification signal that the shockproofness of normally knocking at the door and the time interval are set, the vibration signal that produces when knocking at the door when inductor is detected is after amplifying circuit amplifies the input single-chip microcomputer, single-chip microcomputer is discerned, if conform to pre-input identification signal, then send the doorbell signal to warning circuit, trigger the doorbell sound of hummer.

Single-chip microcomputer of the present invention can also carry out password setting and time-delay setting by programming.

The present invention preferentially selects the detection inductor of piezoelectric ceramics as vibrations and sound for use.

The present invention utilizes the power of single-chip microcomputer, has realized unification on doorbell and the alarm function by programming and pre-input identification signal.Use piezoelectric ceramics as inductor, the vibration signal amplification circuit output end is connected with single-chip microcomputer with the warning circuit input end, and vibration signal input single-chip microcomputer sends alerting signal to warning circuit by single-chip microcomputer.When piezoelectric ceramics is sensed sound field variation (vibrations), can produce faint induction current, by the induction current amplifying circuit induction current is amplified, be input to a certain designated port of single-chip microcomputer, pass through software instruction, specify the another port to send the high level of certain frequency, amplify by signal amplification circuit, drive warning circuit, make piezoelectric ceramics (hummer) send very brief alarm sound, single-chip microcomputer timing on one side simultaneously, continue to wait for the induction current input on one side, as the induction current input is arranged at the appointed time, confirm as through judgement and be not undesired signal, then judged whether the displacement signal input again, if there is not displacement signal, then drive warning circuit and report to the police,, then remove and report to the police if displacement signal is arranged; If single-chip microcomputer does not have the induction current input in the middle of timing course, then single-chip microcomputer judges that previous induction current is a undesired signal, recovers holding state.

Sense when knocking at the door sound when piezoelectric ceramics, principle of work is the same, then drives warning circuit if identification is the sound of normally knocking at the door, and promotes hummer and sends doorbell sound.

Description of drawings

Fig. 1 is circuit theory diagrams of the present invention;

Fig. 2 is a main program block diagram of the present invention;

Fig. 3 is an electric current process flow diagram in the operation program of the present invention system.

Among the figure, S1 is standby displacement detection switch, preferentially adopts tongue tube; S2 is a password input key, the double as displacement detection switch; T1 is a transformer; BJ1 is a hummer; BJ2 is an inductor.

Embodiment

The present invention is further described below in conjunction with drawings and Examples.

As shown in Figure 1, 2, 3, the present invention preferentially adopts the PIC509 single-chip microcomputer, and other circuit part is all around single-chip microcomputer.Utilize the various states of this each port of type single-chip microcomputer and each other relation all by the characteristics of programming Control, the electric signal that piezoelectric effect changes during utilization piezoelectric ceramics BJ2 induction vibrations (sound), enter triode Q2 by tongue tube S1 and amplify the GP3 port that enters PIC509 at last, this port is as the vibration signal input; Password input switch S2 connects the GP1 port of PIC509, and the GP1 port is an input port, imports to password; Displacement tongue tube S1 connects the GP0 port of PIC509, and the GP0 port is an input port, most displacement input; The GP5 of PIC509 is an output port, the signal output port of voice prompt, doorbell sound, alarm sound and low voltage experiment most, signal through D1 indication, R1 current limliting, Q1 amplify, transformer T1 boosts and promotes BJ3 and sound.

The present invention is in off-mode earlier, and whether utilize displacement tongue tube S1 again is that " pass " waken micro computer work up and entered holding state and connect the Q1 amplifier.When the door state is " pass ", the present invention is in holding state, PIC509 analyzes vibration signal as vibration signal, whether be the signal of knocking at the door, if there is the vibration signal of certain intervals and sufficient intensity then to think the signal of knocking at the door, send the doorbell voice signal stopping to shake back 2 seconds, detect whether meet the afore mentioned rules vibration signal in addition again after sending doorbell sound, if then continue to send doorbell sound and improve volume in addition; Calculate to ring the doorbell number of times simultaneously, ring doorbell for several times after, owner do not open the door then represent owner not or owner lose the visitor, if also have vibration signal then directly to send of short duration warning, drive visiting for owner.When PIC509 analyzes vibration signal, though the vibration signal of certain intervals and sufficient intensity is arranged, but vibration signal is too much, do not have that to stop to shake 2 seconds and then think the signal that is not to knock at the door be to unblank to shake sound, enter antitheft counting and timing, at the number of times of regulation with in the time, detect displacement signal, then think and normally opened, will not report to the police, enter the shutdown sleep state by key; If vibration signal surpassed in the number of times and the time of regulation, then think forcing open the door, if there is vibration signal then to send of short duration warning immediately, if detect displacement signal, then send warning continuously, must press S2 button input password and can remove warning, otherwise continuous alarm is more than 2 minutes; If the concussion number of times is not enough in official hour, then thinks bothering, and recover holding state.

For realizing above-mentioned design, theft-proof door bell uses circuit theory as shown in Figure 1, among Fig. 1, piezoelectric ceramics BJ2 induction vibrations electric signal, form amplifying circuit jointly by tongue tube S1, triode Q2, biasing circuit R3, divider resistance R5 and R6, pull-up resistor R2, signal amplifies the GP3 port that enters PIC509 from collector through triode; Signal can pass through when S1 was closed, and the GP0 port of PIC509 is in electronegative potential and enters holding state, analyze as vibration signal PIC509 degree vibration signal, and whether be the signal of knocking at the door, be then to send the doorbell voice signal stopping to shake back 2 seconds; When PIC509 analyzes vibration signal, though the vibration signal of certain intervals and sufficient intensity is arranged, but vibration signal is too much, do not have that to stop to shake 2 seconds and then think the signal that is not to knock at the door be to unblank to shake sound, enter antitheft counting and timing, at the number of times of regulation with in the time, detect displacement signal, then think and normally opened by key; If the concussion number of times is not enough in official hour, then thinks bothering, and recover holding state; If vibration signal surpasses number of times and time in regulation, then think forcing open the door, this moment is if there is the GP5 output port output alarm voice signal of vibration signal PIC509, process D1 pilot lamp, R1 current-limiting resistance, Q1 amplify, transformer T1 boosts, and promotion hummer BJ1 sends of short duration warning immediately, if detect displacement signal, then send warning continuously, must press S2 button input password and can remove warning, otherwise continuous alarm is more than 2 minutes.

Claims

1, a kind of intelligent theft-proof door bell contains displacement/vibration signal amplifying circuit, warning circuit, inductor and hummer, it is characterized in that: 1. displacement/vibration signal amplification circuit output end is connected with single-chip microcomputer with the warning circuit input end; 2. the identification signal of setting according to normal switch door time and displacement/vibrations is imported single-chip microcomputer in advance, open the displacement/vibration signal of generation at closing time behind amplifying circuit input single-chip microcomputer when inductor is detected, single-chip microcomputer is discerned, if differ from the identification signal of pre-input, then single-chip microcomputer sends alerting signal to warning circuit, triggers the alarm sound of hummer; 3. the identification signal of setting according to the shockproofness of normally knocking at the door and the time interval is imported single-chip microcomputer in advance, the vibration signal that produces when knocking at the door when inductor is detected is after amplifying circuit amplifies the input single-chip microcomputer, single-chip microcomputer is discerned, if conform to pre-input identification signal, then send the doorbell signal to warning circuit, trigger the doorbell sound of hummer.

2, intelligent theft-proof door bell according to claim 1 is characterized in that single-chip microcomputer carries out password setting by programming and time-delay is provided with.

3. intelligent theft-proof door bell according to claim 1 is characterized in that adopting the detection inductor of piezoelectric ceramics as vibrations and sound.