CN201699801U

CN201699801U - Intelligent furniture remote information transmitter

Info

Publication number: CN201699801U
Application number: CN2010202583257U
Authority: CN
Inventors: 钱士坚
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-14
Filing date: 2010-07-14
Publication date: 2011-01-05
Anticipated expiration: 2020-07-14

Abstract

The utility model provides an intelligent furniture remote information transmitter comprising a ring detecting module, a simulating offhook module, a DTMF decoding module and a main control module which are connected orderly. After ring signals are detected by the ring detecting module, a circuit is switched on through the simulating offhook module, and intelligent furniture information is transmitted to a remote receiving end through the main control module after the DTMF decoding module makes sound frequency decoding access.

Description

Smart Home remote information transmitter

Technical field

The utility model relates to a kind of electronic equipment, especially a kind of Smart Home remote information transmitter.

Background technology

Intelligent domestic system is the focus of the information-based industry of present household, and people wish and can long-rangely recognize household information whenever and wherever possible, can recognize the domestic environment situation, but lacks the teleinformatic transmission means of a kind of household at present.

Summary of the invention

The shortcoming of for a change above-mentioned traditional household transmission of Information inconvenience, the utility model provides a kind of Smart Home remote information transmitter, comprise ring detection module, simulation off-hook module, DTMF decoder module, main control module, it is characterized in that, ring detection module, simulation off-hook module, DTMF decoder module, main control module connect successively, the ring detection module passes through simulation off-hook module automatic processing circuit after detecting bell signal, is undertaken sending the information of Smart Home to long-range receiving terminal by main control module after the audio decoder access by the DTMF decoder module.

The beneficial effects of the utility model are, adopt PSTN network remote access and information to send, and limit no region, easy to use, has good practicability and economy.

Description of drawings:

Fig. 1 is a schematic diagram of the present utility model, and Fig. 2 is the utility model electricity structure chart.

Embodiment:

As shown in Figure 1, the utility model comprises ring detection module 1, simulation off-hook module 2, DTMF decoder module 3, main control module 4, ring detection module 1, simulation off-hook module 2, DTMF decoder module 3, main control module 4 connect successively, ring detection module 1 passes through simulation off-hook module 2 automatic processing circuits after detecting bell signal, is undertaken sending the information of Smart Homes to long-range receiving terminal by main control module 4 after the audio decoder access by DTMF decoder module 3.

As shown in Figure 2, adopt voltage-stabiliser tube, photoelectrical coupler and reverser (transistor 9018), the bell signal of one-period is changed into the square-wave signal of one-period, the INT0 that sends into LPC932 counts, when bell signal, the ringing signal on the telephone wire is the AC signal of (75 ± 15) V, 25Hz.Wherein direct voltage is about 48V, and alternating voltage is the sinusoidal signal of (25 ± 15) V, 25Hz.After this signal enters ring detecting circuit, at first carry out every directly 1 metering function of resistance R with high-voltage capacitance C1.AC signal is input to photoelectrical coupler conversion then through passing through voltage-stabiliser tube D1 step-down behind the R1.Signal after the conversion can become the long period pulse signal of standard low level and band ripple high level behind C2 and R2 filter rectification; But the waveform of output is bad, and the state of high level is also relevant with switch, so added that in the back a transistor reverser as shaping, so just can obtain very complete waveform, i.e. the every ring of phone once just produces the square-wave signal of one-period.To be controlled to be low level by CPU, T1 ends, and circuit can't form the loop, does not have electric current (perfect condition), and switch thinks that then telephone wire is in hook state.Dislodging machine signaling is realized by making the P1.3 mouth become high level by single-chip microcomputer.Change the base voltage of transistor T 1, make T1 be in conducting state, thereby attracting electric relay K1 makes audio signal be input to decoding circuit by K1 and decodes.At this moment the telephone wire loop current becomes about 30mA suddenly, so switch detects loop current and becomes and greatly just to think telephone set off-hook, what entire circuit was finished automatic simulation off-hook process employing is MT8870 dual-tone multifrequency decoding chip, can realize the decoding of touch-tone signal DTMF.When receiving dtmf signal, the touch-tone signal that enters from TEL0, TEL1 behind the simulation off-hook is coupled into the input pin IN of MT8870 through the overcoupling isolating transformer, dtmf signal through amplifier, dialing tone filter, high frequency group and low frequency component from band pass filter deliver to digital algorithm and code converter is confirmed and the access of encoding after, by main control module the information of Smart Home is sent to long-range receiving terminal by the PSTN network.

Claims

1. Smart Home remote information transmitter, comprise ring detection module (1), simulation off-hook module (2), DTMF decoder module (3), main control module (4), it is characterized in that ring detection module (1), simulation off-hook module (2), DTMF decoder module (3), main control module (4) connect successively.