CN100386781C

CN100386781C - Intercom remote control device with identity code function

Info

Publication number: CN100386781C
Application number: CNB2005100440642A
Authority: CN
Inventors: 范晓征
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-12
Filing date: 2005-07-12
Publication date: 2008-05-07
Anticipated expiration: 2025-07-12
Also published as: CN1725258A

Abstract

The present invention discloses an interphone remotely controlling device with an identity code function, which solves the problems of false operation, poor safety and reliability, etc. caused by that the existing interphones with the same frequency point and with the same arrangement can not be differentiated with one another and has the advantages of reasonable structure, convenient use, identity identifying function, effective discrimination of order, enhancement of safety and reliability of remote control, etc. The present invention has the structure that the interphone remotely controlling device comprises an interphone transmitting circuit, an interphone receiving circuit, etc., wherein the transmitting circuit is connected with an identity code coding circuit. The identity code coding circuit sends out a dual-tone multifrequency identity code signal which has different frequencies from that of the dual-tone multifrequency control signal of the transmitting circuit. The signal is transmitted together with the control signal sent out by the transmitting circuit. The receiving circuit is connected with an identity code demoding circuit. After decoded by the identity code demoding circuit, the identity code signal is transmitted into the IC2 control circuit of the single chip machine. When the identity code decoding signal meets agreement, the IC2 control circuit of the signal chip machine implements the action of the control signal or else the IC2 control circuit does not implement the action of the control signal.

Description

Intercom telechiric device with identity code function

Technical field

The present invention relates to a kind of telechiric device, relate in particular to a kind of intercom telechiric device that utilizes intercom with identity recognition function.

Background technology

Intercom be a kind of can be at the equipment that communicates more at a distance, but people utilize the characteristics of its telecommunication, with it as a kind of remote control equipment.Adopt intercom to make telepilot in many workplaces of remote control that need at present, control the operation of some equipment.Its principle of work is: utilize the numeric keypad (being dial-up circuit) of intercom, send out DTMF (dual-tone multifrequency) sign indicating number, after receiver (intercom, Vehicle mounted station, the base station etc.) reception and decoding by far-end, send computer control some equipment.But there is a problem in existing intercom formula remote control equipment, and promptly same frequency, with no identity sign between the intercom of configuration can be controlled the other side's equipment each other, causes misoperation, makes security, the reliability reduction of control system, has accident potential.

Summary of the invention

The present invention is exactly in order to solve present same frequency, can not to be distinguished from each other with the intercom that disposes, easily cause misoperation, the problem of security poor reliability, provide a kind of have rational in infrastructure, easy to use, identity recognition function is arranged, can effectively judge the relation of control information and identity information, improve the advantages such as security reliability of remote control, intercom telechiric device with identity code.

For achieving the above object, the present invention has adopted following technical scheme: a kind of intercom telechiric device with identity code function, it comprises intercom radiating circuit and receiving circuit etc., described radiating circuit is connected with the identity code coding circuit, the dual-tone multifrequency identity code signal of the dual-tone multifrequency control signal alien frequencies of generation of identity code coding circuit and radiating circuit, the control signal that this signal and radiating circuit send sends in the lump.

Described identity code coding circuit comprises that dialing chip IC 1 produces corresponding identity code signal, and dialing chip IC 1 is connected with the oscillatory circuit I that is made of capacitor C 1, C2, quartz wafer C0 and resistance R 1, and oscillatory circuit I produces required oscillation frequency; The tone output terminal of dialing chip IC 1 is connected the identity code signal behind divider resistance R3, capacitance C3 and current-limiting resistance R2 with the tone input end of radiating circuit.

The crystal oscillator frequency scope 430-530KHz of described oscillatory circuit I;

The crystal oscillator frequency of described oscillatory circuit I selects 480KHz.

Described dialing chip IC 1 model is MK5087 or CSC5087 or GF5087 or TP5087 or MT5087 or UM95087 or WE9187 or CIC9187 or S2559 or LH2559 or SBA5091 or LR4087 or MK5380 or MV5087.

A kind of intercom telechiric device with identity code function, it comprises intercom radiating circuit and receiving circuit etc., and described receiving circuit is connected with the identity code decoding circuit, and the identity code decoding circuit is sent into single-chip microcomputer IC2 control circuit after with the identity code signal decoding; Single-chip microcomputer IC2 also is connected with the control code decoding circuit, and the identity code decoded signal meets agreement, and single-chip microcomputer IC2 control circuit is then carried out the action of control signal, otherwise will not carry out.

The tone output terminal that described identity code decoding circuit structure is the intercom receiving circuit is sent into decoding chip IC3 with the identity code signal behind bandpass filter, capacitance C4 and divider resistance R4, R5, send into the input end of single-chip microcomputer IC2 after the decoding chip IC3 decoding; Simultaneously decoding chip IC3 also is connected with oscillatory circuit II, and oscillatory circuit II is made up of capacitor C 5, C6 and quartz wafer C7, and its oscillation frequency is identical with crystal oscillator frequency in the identity code coding circuit; The tone output terminal of intercom receiving circuit send the control signal decoding circuit with control signal, and crystal oscillator frequency is 3.579545MHz.

Described decoding chip IC3 model is MT8870, and described single-chip microcomputer IC2 model is 89C51.

The present invention utilizes the circuit that transmits and receives of existing intercom, respectively at the radiating circuit access identity sign indicating number coding circuit of intercom, at the receiving circuit access identity sign indicating number decoding circuit of remote receiver.Wherein the signal that sent of identity code coding circuit and the control signal of intercom are the dtmf signal of alien frequencies, and both are by the wireless receiving circuit of delivering to remote receiver simultaneously.Be connected to identity code decoding circuit and control code decoding circuit in the receiving circuit, it sends into single-chip microcomputer after with control signal and identity code signal decoding.

Principle of work of the present invention is: the identity code coding circuit is embedded intercom inside, the output of the tone of identity code coding circuit is received the tone input end of intercom, the input pin of chip of will dialling in advance as required connects, generate the DTMF sign indicating number of representative capacity sign indicating number continuously, this signal is received the tone input end of intercom, when intercom is in emission state, this signal sends simultaneously with the intercom signaling simultaneously, because the selected crystal oscillator of coding circuit (frequency range 430---530KHz, select 480KHz) different with crystal oscillator (frequency 3.579545MHz) frequency of intercom dial-up circuit, though send two groups of DTMF sign indicating numbers simultaneously, but do not disturb mutually, the crystal oscillator frequency of dialing chip adopts 480KHz, produces the nonstandard double-tone multi-frequency coding signal from 93Hz to 219Hz, does not influence speech quality substantially.Wherein one group is control code (the DTMF sign indicating number of former intercom), and one group is identity code.Receiving end connects two groups of decoding circuits respectively with the tone output terminal of receiver, separates control code for one group; Separate the identity code sign indicating number for one group, then two results are sent single-chip microcomputer to handle, as meeting agreed terms after the identity code decoding, single-chip microcomputer is carried out control action, as does not meet agreed terms, does not then carry out.

Advantage of the present invention also has, and 1, the identity code signal belongs to dark and send out, promptly this identity code signal sends simultaneously when sending normal control command, need not increase any operation, and is very convenient; 2, solve the problem of mutual operation between the intercom, played and to have improved accuracy, security, the reliability of control system with disposing the effect that intercom is distinguished frequently and together, eliminated accident potential.

Description of drawings

Fig. 1 is an identity code coding circuit schematic diagram of the present invention;

Fig. 2 is an identity code decoding circuit schematic diagram of the present invention.

Embodiment

The invention will be further described below in conjunction with accompanying drawing and embodiment.

Among Fig. 1, the identity code coding circuit is that dialing chip IC 1 grade of TCM5087 is formed by model, input pin COL1, COL2, COL3, COL4, ROW1, ROW2, ROW3, the ROW4 of dialing chip IC 1 are connected on demand and weld, 16 kinds of combinations can be arranged, every intercom is got one.The chip IC that wherein dials 17,8 pin meet the oscillatory circuit I that is made up of capacitor C 1, C2 and quartz wafer C0, and its selectable frequency range is 430-530KHz, adopts the 480KHz frequency in practice, and this oscillator signal provides pulse signal for dialing chip IC 1.Dialing chip IC 1 produces the DTMF sign indicating number of continuous representative capacity sign indicating number, and its model also can be MK5087 or CSC5087 or GF5087 or TP5087 or MT5087 or UM95087 or WE9187 or CIC9187 or S2559 or LH2559 or SBA5091 or LR4087 or MK5380 or MV5087 etc.Dialing chip IC 1 output terminal the 16th pin signal is sent into identity code through divider resistance R3, capacitance C3, current-limiting resistance R2 the tone input end of intercom radiating circuit.Because selected crystal oscillator (the frequency 480KHz of this coding circuit, scope 430---530KHz) crystal oscillator (frequency 3.579545MHz) frequency with the intercom dial-up circuit is different, though send two groups of DTMF sign indicating numbers simultaneously, but do not disturb mutually, one group is control code (the DTMF sign indicating number of former intercom), and one group is identity code.

Among Fig. 2, the tone output terminal RD of receiver connects 2 pin of decoding chip IC3 through tape splicing bandpass filter, capacitance C4, divider resistance R4, connects 3 pin of decoding chip IC3 after resistance R 5.7,8 pin of decoding chip IC3 meet the oscillatory circuit II that is made up of capacitor C 5, C6 and quartz wafer C7, and the oscillation frequency of this oscillatory circuit II is identical with the oscillation frequency of oscillatory circuit I.Decoding chip IC3 is sent into identity code decoding back the input end of single-chip microcomputer IC2 by its output terminal.The tone output terminal RD of receiver delivers to the control signal decoding circuit with control signal simultaneously, and this circuit crystal oscillator frequency is 3.579545MHz.If decoded signal meets agreement, single-chip microcomputer IC2 then sends the execution signal, goes to carry out the instruction of control code, as does not meet agreement, does not then carry out control command.The 10th foot meridian capacitor C8 ground connection of decoding chip IC3; The 18th pin connects the 5V power supply, and the 17th foot meridian capacitor C9 connects power supply, and the 16th pin connects capacitor C 9,5,6,9 pin ground connection through resistance R 6.

Control signal is by independent control signal decoding circuit decoding, its input end links to each other with the tone output terminal RD of receiver, after the control code decoding, send into the input end of single-chip microcomputer IC2 from output terminal, single-chip microcomputer IC2 does not carry out after receiving control signal immediately, but wait for the decoded signal of identity code decoding circuit, meet the action of about rule execution control signal as decoded signal, as do not meet about rule and do not carry out this order.

Claims

1. intercom telechiric device with identity code function, it comprises intercom radiating circuit and receiving circuit etc., described radiating circuit is connected with the identity code coding circuit, the dual-tone multifrequency identity code signal of the dual-tone multifrequency control signal alien frequencies of generation of identity code coding circuit and radiating circuit, the control signal that this signal and radiating circuit send sends in the lump; Wherein the identity code coding circuit comprises dialing chip IC 1, and it produces corresponding identity code signal, and dialing chip IC 1 is connected with the oscillatory circuit I that is made of capacitor C 1, capacitor C 2, quartz wafer C0 and resistance R 1, and oscillatory circuit I produces required oscillation frequency; The tone output terminal of dialing chip IC 1 is connected the identity code signal behind divider resistance R3, capacitance C3 and current-limiting resistance R2 with the tone input end of radiating circuit; It is characterized in that: described receiving circuit is connected with the identity code decoding circuit, and the identity code decoding circuit is sent into single-chip microcomputer IC2 control circuit after with the identity code signal decoding; Single-chip microcomputer IC2 also is connected with the control code decoding circuit, and the identity code decoded signal meets agreement, and single-chip microcomputer IC2 control circuit is then carried out the action of control signal, otherwise will not carry out; Wherein, identity code decoding circuit structure is, the tone output terminal of intercom receiving circuit is sent into decoding chip IC3 with the identity code signal after bandpass filter, capacitance C4 and divider resistance R4, resistance R 5, send into the input end of single-chip microcomputer IC2 after the decoding chip IC3 decoding; Simultaneously decoding chip IC3 also is connected with oscillatory circuit II, and oscillatory circuit II is made up of capacitor C 5, capacitor C 6 and quartz wafer C7, and its oscillation frequency is identical with crystal oscillator frequency in the identity code coding circuit; The tone output terminal of intercom receiving circuit send the control signal decoding circuit with control signal, and its crystal oscillator frequency is 3.579545MHz.