CN104660752B - A kind of emergency communication main frame for having both inside and outside call function - Google Patents

Abstract

The invention discloses a kind of emergency communication main frame for having both inside and outside call function, including host shell, intercommunication button, talkback handle, power circuit, main frame inside and outside speaking circuit and talkback handle speaking circuit, power circuit includes rechargeable battery, isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit, rechargeable battery, power supply switch circuit, battery charger, battery protecting circuit, battery voltage detection circuit, non-isolated Boost circuit, linear voltage-stabilizing circuit and extension set voltage supply control circuit, main frame inside and outside speaking circuit includes gsm module, SIM card holder, GSM antenna, watchdog circuit, reset circuit, speed signal processing circuit, distress call detects circuit, handle on-hook detection button circuit, buzzer circuit, the low indicating circuit of battery electric quantity and GSM network signal indicating circuit.The present invention is easy to install, and voice response speed is fast, and speech quality is high, and functional reliability is high, can realize urgent call in 24 hours.

Description

A kind of emergency communication main frame for having both inside and outside call function

Technical field

The invention belongs to emergency communication equipment technical field, and in particular to a kind of to have both the emergent logical of inside and outside call function Letter main frame.

Background technology

With developing rapidly for national economy, labour-intensive industrial and mining enterprises, the Quantity of industrial premises increase, city The density of population steeply rises, and high residential building is continuously increased, answering in mine, tunnel, factory building, skyscraper, hoistway, confined space Anxious communication equipment turn into captive life last line of defense, therefore emergency communication equipment performance and using to save life It is particularly important.

The ripe emergency communication equipment for using usually direct press type intercom system, is made with electric wire or optical cable on existing market For communication is conducted, wire laying mode has built on stilts, underground, submarine cable and optical cable etc..It is by emergency communication main frame and emergency communication point Machine (one, each communication point device) constitutes a many innings of phone systems.Each communication point sets one on emergency communication main frame Call button, each button is connected by call circuit with corresponding communication point, and direct calling should by directly pressing the calling key Point, mainly realizes the function of INCOM intercom, directly perceived handy, but, also there is following defect and deficiency：

1st, such emergency communication connection system, in addition to sending words line, called line, unlocking line, four bridging lines of ground wire, each Communication point needs a calling connection line, and wiring is numerous and diverse, and category closing wiring can not incorporate cell comprehensive network；If calling place away from Many from length, monitoring points, then cable wiring manufacture difficulty is bigger, spreads line long construction period, and payphone is dialled outward needs switching equipment, circuit dimension Shield is costly；

2nd, limited transmission distance, long haul communication signal attenuation is serious；

3rd, night shift room personnel must accomplish 24 hours it is on duty, it is impossible to realize urgent call in 24 hours, and cost of serving is high；

4th, without SMS alarm function, do not accomplish that multimode reliability is alarmed；

5th, poor anti jamming capability, when there is external interference, it is unintelligible that speech quality can become, it is impossible to meets the need of user Ask；

6th, product poor expandability, once system buildup is good, then the position of each side's emergency communication main frame and each side's communication point Cannot just change, transforming circuit for the accommodation of follow-up place causes very big cost hidden danger, and due to technical reason, Product up-gradation or extension have larger limitation.

The content of the invention

The technical problems to be solved by the invention are for above-mentioned deficiency of the prior art, there is provided one kind has both inside and outside The emergency communication main frame of portion's call function, its simple structure is reasonable in design, easy to install, and voice response speed is fast, can Long haul communication is realized, speech quality is high, and functional reliability is high, urgent call in 24 hours can be realized, it is practical, it is easy to push away Extensively use.

In order to solve the above technical problems, the technical solution adopted by the present invention is：It is a kind of to have both answering for inside and outside call function Anxious communication host, it is characterised in that：Including host shell and the handle groove being arranged at the top of host shell and intercommunication button, institute State and talkback handle be hung with handle groove, the host shell be internally provided with power circuit, main frame inside and outside speaking circuit and Talkback handle speaking circuit, is provided with the talkback handle interface end for connecting talkback handle in the talkback handle speaking circuit Son, the talkback handle Interface Terminal is exposed at the side of host shell；

The power circuit includes rechargeable battery and for 220V alternating currents to be converted into the isolated single-ended of+4.9V voltages Reverse exciting switching voltage regulator reduction voltage circuit, and for selecting 220V AC-powereds or rechargeable battery powered and export+4.2V voltages Power supply switch circuit, the isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit and rechargeable battery with power supply switch circuit phase Connect, the output of the isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit is terminated with the battery charging electricity connected with rechargeable battery Road, be connected on the battery for rechargeable battery is carried out additives for overcharge protection, over, overcurrent protection, short-circuit protection and The battery protecting circuit of high temperature protection, the output of the rechargeable battery is terminated with battery voltage detection circuit, the power supply switching The output of circuit is terminated with power indicating circuit and for by non-isolated Boost liters that+4.2V voltage conversions are+12V voltages Volt circuit, the power indicating circuit includes being exposed at the power supply indicator of host shell side, the non-isolated Boost liters The output of volt circuit point two-way, is connected to for by the linear voltage-stabilizing circuit that+12V voltage conversions are+5V voltages, another road to connect all the way Have for controlling+12V voltage outputs to the extension set voltage supply control circuit of emergency communication extension set, the extension set voltage supply control Circuit processed includes being exposed at the call signal indicator lamp of host shell side；

Main frame inside and outside speaking circuit include gsm module and connect with the gsm module SIM card holder, GSM days Line, watchdog circuit, reset circuit and speed signal processing circuit, output end and the GSM moulds of the battery voltage detection circuit The input of block connects, and the input of the gsm module is further connected with distress call detection circuit and handle on-hook detection button electricity Road, the handle on-hook detection button circuit includes the handle on-hook detection button being exposed on handle groove, the handle on-hook Detection button circuit is connected with talkback handle speaking circuit, the battery charger and extension set voltage supply control circuit with The output end of gsm module connects, the output end of the gsm module be further connected with the low indicating circuit of buzzer circuit, battery electric quantity and GSM network signal indicating circuit, the low indicating circuit of battery electric quantity includes that the battery electric quantity for being exposed at host shell side is low Indicator lamp, the GSM network signal indicating circuit includes being exposed at the GSM network signal lamp of host shell side, described Speed signal processing circuit includes output voice modulate circuit, input voice modulate circuit and anti-side-tone circuit, the output language Sound modulate circuit includes the output voice isolation filter circuit, output audio resistance-capacitance coupling filter circuit and the output sound that connect successively Frequency amplifying circuit, the output voice isolation filter circuit connects with the output end of gsm module, the output audio amplifier circuit Output end connect with anti-side-tone circuit, the input voice modulate circuit includes the input voice resistance-capacitance coupling filter for connecting successively Wave circuit, input voice filtering and amplifying circuit, input voice output buffer circuit and input voice isolation filter circuit, it is described defeated The input for entering voice resistance-capacitance coupling filter circuit connects with anti-side-tone circuit, the output of the input voice isolation filter circuit End connects with the input of gsm module；The host shell bottom is provided with hanging rail, for connecting emergency communication extension set Extension set Interface Terminal, the power supply terminal for connecting 220V alternating currents, the antenna pedestal for connecting GSM antenna and for tearing open The battery cover of packed battery, was provided with for dividing that the signal output part with emergency communication extension set is connected on the extension set Interface Terminal Machine signal wire interface, the extension set ground connection line interface being connected for the earth terminal with emergency communication extension set, for connecting outside+12V + 12V positive sources the interface of the positive source of electrical appliance and the+12V electricity for connecting the power cathode of outside+12V electrical appliances Source negative pole interface, the distress call detection circuit, anti-side-tone circuit and talkback handle speaking circuit connect with extension set holding wire Mouth the connection ,+12V positive sources interface is connected with extension set voltage supply control circuit, the isolated single-ended reverse exciting switch Power voltage step down circuit is connected with power supply terminal.

A kind of above-mentioned emergency communication main frame for having both inside and outside call function, it is characterised in that：The gsm module is Gsm module GU900Q, the 1st pin of the gsm module GU900Q is grounded by resistance R75, and the of the gsm module GU900Q 7 pins are connected by resistance R66 with the 15th pin of gsm module GU900Q, and the 15th pin of the gsm module GU900Q passes through Nonpolar electric capacity C62 in parallel and nonpolar electric capacity C63 ground connection, the 34th pin of the gsm module GU900Q passes through resistance R79 Connect with the 15th pin of gsm module GU900Q, the 35th pin of the gsm module GU900Q is grounded by resistance R78, described 26th pin of gsm module GU900Q is grounded by nonpolar electric capacity C61, the 55th~57 pin of the gsm module GU900Q Connect with+4.2V the voltage output ends of power supply switch circuit, and by nonpolar electric capacity C58, nonpolar electric capacity in parallel C59, polar capacitor C60 and resistance R58 are grounded；

The extension set Interface Terminal is extension set letter for the 1st pin of four-wire interface terminal J1, the four-wire interface terminal J1 2nd pin of number line interface CH, the four-wire interface terminal J1 is grounded line interface GND, the four-wire interface terminal J1 for extension set The 3rd pin for+12V power cathodes interface-, the 4th pin of the four-wire interface terminal J1 for+12V positive sources interface+, The commutation diode D30 that negative electrode connects with it, the commutation diode are connected on 4th pin of the four-wire interface terminal J1 The anode of D30 connects with+12V the voltage output ends of extension set voltage supply control circuit.

A kind of above-mentioned emergency communication main frame for having both inside and outside call function, it is characterised in that：The supply terminals Son is two line interface terminal J9, and the isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit includes chip VIPER22AS-E, optocoupler Isolating chip JC817, three-terminal voltage-stabilizing chip CYT431A, rectifier DZ, the change with a primary coil and two secondary coils Depressor T4, fast recovery diode D24, commutation diode D29, polar capacitor C66 and Schottky diode D25, the transformation One end of the primary coil of device T4 connects with the cathode voltage output end of rectifier DZ and the positive pole of polar capacitor C66, and passes through Resistance R84 and nonpolar electric capacity C67 in parallel connects with the negative electrode of fast recovery diode D24, one of the rectifier DZ Ac input end connects with the 1st pin of two line interface terminal J9, and another ac input end of the rectifier DZ is by protecting Dangerous silk F1 connects with the 2nd pin of two line interface terminal J9, the cathode voltage output end and polar capacitor C66 of the rectifier DZ Negative pole be grounded；5th pin of the chip VIPER22AS-E, the 6th pin, the 7th pin and the 8th pin are extensive with quick The other end of the anode of multiple diode D24 and the primary coil of transformer T4 connects, and the 1st of the chip VIPER22AS-E draws Pin and the 2nd pin are grounded, and the 3rd pin of the chip VIPER22AS-E connects with the 3rd pin of chip JC817, and passes through Nonpolar electric capacity C76 ground connection, the 4th pin of the chip VIPER22AS-E passes through the moon of resistance R92 and commutation diode D29 Pole connects, and is connected with the 4th pin of chip JC817 by resistance R93, and is grounded by nonpolar electric capacity C77, the rectification The anode of diode D29 connects with one end of a secondary coil of the transformer T4, a secondary of the transformer T4 The other end ground connection of coil；The negative electrode phase that 1st pin of the chip JC817 passes through resistance R91 and Schottky diode D25 Connect, and connected with the 2nd pin of chip JC817 and the negative terminals of three-terminal voltage-stabilizing chip CYT431A by resistance R94, institute The positive terminal ground connection of three-terminal voltage-stabilizing chip CYT431A is stated, the Voltage Reference end of the three-terminal voltage-stabilizing chip CYT431A passes through Resistance R95 connects with the negative electrode of Schottky diode D25, and is grounded by resistance R97, the sun of the Schottky diode D25 Pole connects with one end of another secondary coil of transformer T4, and resistance R87 and nonpolar electric capacity C68 and Xiao by connecting The negative electrode of special based diode D25 connects, the other end ground connection of another secondary coil of the transformer T4, the Schottky two The negative electrode of pole pipe D25 is the+4.9V voltage output ends of isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit, and by polar capacitor C70 is grounded；

The power supply switch circuit includes PMOS Q14, commutation diode D26 and fast recovery diode D35, the PMOS The grid of pipe Q14 and the anode of commutation diode D26 with the+4.9V voltages of isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit Output end connects, and the drain electrode of the PMOS Q14 and the anode of fast recovery diode D35 connect with the positive pole of rechargeable battery, The source electrode of the PMOS Q14 and the negative electrode of fast recovery diode D35 connect with the negative electrode of commutation diode D26 and are power supply + 4.2V the voltage output ends of switching circuit；

The power supply indicator is light emitting diode D2, and the power indicating circuit is also including resistance R9, described luminous two The anode of pole pipe D2 is connected by resistance R9 with the+4.2V voltage output ends of power supply switch circuit, the light emitting diode D2's Minus earth；

The non-isolated Boost circuit includes switching power source chip MC34063A, Schottky diode D34 and pole Property electric capacity C87, the 8th pin of the switching power source chip MC34063A is by the resistance R103 and resistance R104 and power supply that connect + 4.2V the voltage output ends of switching circuit connect, the 6th pin and power supply switch circuit of the switching power source chip MC34063A + 4.2V voltage output ends connect, the 7th pin of the switching power source chip MC34063A is with resistance R103's and resistance R104 Connection end connects, and by the 1st pin and the sun of Schottky diode D34 of inductance L10 and switching power source chip MC34063A Pole connects, the negative electrode of the Schottky diode D34 be the+12V voltage output ends of non-isolated Boost circuit and with pole Property electric capacity C87 positive pole connect, the negative pole ground connection of the polar capacitor C87, the 5th of the switching power source chip MC34063A draws Pin is grounded by resistance R108, and is connected with the negative electrode of Schottky diode D34 by resistance R107, the switching power source chip 3rd pin of MC34063A is grounded by nonpolar electric capacity C81；

The linear voltage-stabilizing circuit include voltage stabilizing chip LM7805, the 1st pin of the voltage stabilizing chip LM7805 with it is non-every + 12V voltage output ends from formula Boost circuit connect, and are grounded by nonpolar electric capacity C83；The voltage stabilizing chip The 2nd pin ground connection of LM7805, the 3rd pin of the voltage stabilizing chip LM7805 is the+5V voltage output ends of linear voltage-stabilizing circuit, And be grounded by nonpolar electric capacity C86；

The call signal indicator lamp is light emitting diode D1, and the extension set voltage supply control circuit also includes triode The 7th pin that the base stage of Q1, triode Q17 and triode Q28, the triode Q1 passes through resistance R10 and gsm module GU900Q Connect, and be grounded by nonpolar electric capacity C3, the grounded emitter of the triode Q1, the colelctor electrode of the triode Q1 passes through Resistance R68 connects with the base stage of triode Q17 and the colelctor electrode of triode Q28, and by resistance R8's and light emitting diode D1 Negative electrode connects；The emitter stage of the triode Q17 and the base stage of triode Q28 pass through resistance R325 and non-isolated Boost + 12V the voltage output ends of booster circuit connect, and the light emitting diode D1 is electric with the+12V of non-isolated Boost circuit Pressure output end connects ,+12V the voltage output ends of the current collection extremely extension set voltage supply control circuit of the triode Q17.

A kind of above-mentioned emergency communication main frame for having both inside and outside call function, it is characterised in that：The rechargeable battery is Lithium battery BT1, the battery voltage detection circuit includes resistance R99 and resistance R100, one end of the resistance R99 and resistance One end of R100 connects with the 25th pin of gsm module GU900Q, and the other end of the resistance R99 is with lithium battery BT1 just Pole connects, the other end ground connection of the resistance R100；

The battery charger includes triode Q15, triode Q16 and commutation diode D33, the triode Q16 Base stage connected with the 41st pin of gsm module GU900Q by resistance R102, the grounded emitter of the triode Q16, institute The base stage for stating triode Q15 is connected by resistance R101 with the colelctor electrode of triode Q16, the emitter stage of the triode Q15 with + 4.9V the voltage output ends of isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit connect, the colelctor electrode of the triode Q15 with it is whole The anode of stream diode D33 connects, and the negative electrode of the commutation diode D33 passes through the positive pole phase of resistance R98 and lithium battery BT1 Connect；

The battery protecting circuit includes Li battery protection IC DW01, NMOS tube Q15 and NMOS tube Q16, the lithium electricity Pond protects the 5th pin of chip DW01 to connect with the positive pole of lithium battery BT1 by resistance R109, and by nonpolar electric capacity C88 Negative pole with lithium battery BT1 connects, and the 6th pin of the Li battery protection IC DW01 and the source electrode of NMOS tube Q15 are and lithium The negative pole of battery BT1 connects, and the 1st pin of the Li battery protection IC DW01 connects with the grid of NMOS tube Q15, the lithium 3rd pin of battery protection chip DW01 connects with the grid of NMOS tube Q16, drain electrode and the NMOS tube Q16 of the NMOS tube Q15 Drain electrode connect, the source ground of the NMOS tube Q16, the 2nd pin of the Li battery protection IC DW01 passes through resistance R96 Ground connection；

The low indicator lamp of battery electric quantity is light emitting diode D20, and the low indicating circuit of battery electric quantity also includes three poles The base stage of pipe Q12, the triode Q12 is connected by resistance R71 with the 40th pin of gsm module GU900Q, and by non-pole Property electric capacity C54 ground connection, the colelctor electrode of the triode Q12 is connected by resistance R64 with the negative electrode of light emitting diode D20, described The anode of light emitting diode D20 connects with+4.2V the voltage output ends of power supply switch circuit, the emitter stage of the triode Q12 Ground connection.

A kind of above-mentioned emergency communication main frame for having both inside and outside call function, it is characterised in that：The GSM antenna with 60th pin of gsm module GU900Q connects, and the SIM card holder is SIM card holder ID1A-6S-2.54SF, the SIM card holder 1st pin of ID1A-6S-2.54SF connects with the 30th pin of gsm module GU900Q, and is grounded by nonpolar electric capacity C65, 2nd pin of the SIM card holder ID1A-6S-2.54SF is connected by resistance R80 with the 33rd pin of gsm module GU900Q, institute The 3rd pin for stating SIM card holder ID1A-6S-2.54SF is connected by resistance R81 with the 32nd pin of gsm module GU900Q, described The 4th pin ground connection of SIM card holder, the 6th pin of the SIM card holder ID1A-6S-2.54SF passes through resistance R82 and gsm module 31st pin of GU900Q connects；

The watchdog circuit includes the 1st pin and gsm module of chip PIC12F508, the chip PIC12F508 15th pin of GU900Q connects, the 3rd pin of the chip PIC12F508 pass through resistance R77 and gsm module GU900Q the 16 pins connect, and the 4th pin of the chip PIC12F508 is connected by resistance R76 with the 2nd pin of gsm module GU900Q, The 8th pin ground connection of the chip PIC12F508；

The reset circuit is made up of reset key K2, resistance R118 and nonpolar electric capacity C89, the reset key K2's One end of one end, one end of resistance R118 and nonpolar electric capacity C89 connects with the 16th pin of gsm module GU900Q, described The other end of resistance R118 connects with the 15th pin of gsm module GU900Q, the other end of the reset key K2 and nonpolar The other end of electric capacity C89 is grounded；

The GSM network signal lamp is light emitting diode D21, and the GSM network signal indicating circuit also includes three The base stage of pole pipe Q13, the triode Q13 is connected by resistance R72 with the 52nd pin of gsm module GU900Q, and by non- Polar capacitor C55 is grounded, and the colelctor electrode of the triode Q13 is connected by resistance R65 with the negative electrode of light emitting diode D21, institute State the anode of light emitting diode D21 to connect with+4.2V the voltage output ends of power supply switch circuit, the transmitting of the triode Q13 Pole is grounded；

The buzzer circuit includes that buzzer LS2 and the base stage of triode Q27, the triode Q27 pass through resistance R323 connects with the 42nd pin of gsm module GU900Q, and is grounded by resistance R324, the colelctor electrode of the triode Q27 with The negative pole of buzzer LS2 connects, and the positive pole of the buzzer LS2 connects with+4.2V the voltage output ends of power supply switch circuit, institute State the grounded emitter of triode Q27.

A kind of above-mentioned emergency communication main frame for having both inside and outside call function, it is characterised in that：The distress call inspection Slowdown monitoring circuit includes comparator chip LM393, the 2nd pin of diode D5, the comparator chip LM393 with diode D5 just Pole connects, and is connected with+5V the voltage output ends of linear voltage-stabilizing circuit by resistance R3 and nonpolar electric capacity C1 in parallel, described The negative electrode of diode D5 is connected by the resistance R1 and inductance L1 for connecting with the 1st pin of the four-wire interface terminal J1, described 3rd pin of comparator chip LM393 is connected by resistance R4 with the+5V voltage output ends of linear voltage-stabilizing circuit, and by electricity Resistance R11 ground connection, the 8th pin of the comparator chip LM393 connects with+5V the voltage output ends of linear voltage-stabilizing circuit, described The 4th pin ground connection of comparator chip LM393, the 1st pin of the comparator chip LM393 and the 3rd of gsm module GU900Q the Pin connects, and is connected with the 15th pin of gsm module GU900Q by resistance R5.

A kind of above-mentioned emergency communication main frame for having both inside and outside call function, it is characterised in that：The intercommunication button is Button K1, one end of the button K1 connects with the 44th pin of gsm module GU900Q, and by resistance R69 and gsm module 15th pin of GU900Q connects, the other end ground connection of the button K1；

The talkback handle Interface Terminal be four-wire interface terminal J10, the 1st pin of the four-wire interface terminal J10 with The positive pole of talkback handle internal loudspeaker connects, the 2nd pin and the talkback handle internal loudspeaker of the four-wire interface terminal J10 Negative pole connect, the 3rd pin of the four-wire interface terminal J10 connects and is grounded with the negative pole of talkback handle internal microphone, 4th pin of the four-wire interface terminal J10 connects with the positive pole of talkback handle internal microphone；

The handle on-hook detection button is double single-pole double-throw switch (SPDT) SW1, and described pair the 1st of single-pole double-throw switch (SPDT) SW1 the is drawn Normal-closed end pin, normally opened end pin and the common port that pin, the 2nd pin and the 3rd pin are respectively one single-pole double-throw switch (SPDT) draw Pin, described pair of the 4th pin of single-pole double-throw switch (SPDT) SW1, the 5th pin and the 6th pin are respectively its another single-pole double-throw switch (SPDT) Normal-closed end pin, normally opened end pin and common port pin；The handle on-hook detection button circuit also includes polar capacitor C10, the 1st pin of described couple of single-pole double-throw switch (SPDT) SW1 connects with+12V the voltage output ends of extension set voltage supply control circuit, 3rd pin of described couple of single-pole double-throw switch (SPDT) SW1 is connected by resistance R6 with the positive pole of polar capacitor C10, the polar capacitor The negative pole ground connection of C10, described pair of the 5th pin of single-pole double-throw switch (SPDT) SW1 is by the 15th of resistance R85 and gsm module GU900Q Pin connects, and is connected with the 48th pin of gsm module GU900Q by resistance R117, the described couple of single-pole double-throw switch (SPDT) SW1's 6th pin is grounded；

The talkback handle speaking circuit includes that transformer T5 and the 2nd pin of chip LM386, the chip LM386 lead to Cross nonpolar electric capacity C101 to connect with the 4th pin of the four-wire interface terminal J10, and be grounded by nonpolar electric capacity C100, The nonpolar electric capacity C101 is electric with polarity by resistance R114 with the connection end of the 4th pin of the four-wire interface terminal J10 The positive pole for holding C10 connects, and is grounded by nonpolar electric capacity C102, and the 3rd pin and the 4th pin of the chip LM386 connect Ground, the 6th pin of the chip LM386 connects with the 3rd pin of described couple of single-pole double-throw switch (SPDT) SW1, and by polar capacitor C106 is grounded, and the 7th pin of the chip LM386 is grounded by nonpolar electric capacity C80, the 1st pin of the chip LM386 and The resistance R115 and nonpolar electric capacity C78 of series connection are connected between 8th pin, the 5th pin of the chip LM386 is by series connection Polar capacitor C105 and resistance R74 connects with the centre tap of the primary coil of the transformer T5, the polar capacitor C105 It is grounded by nonpolar electric capacity C79 with the connection end of resistance R74；One end of the primary coil of the transformer T5 and four line 1st pin of Interface Terminal J1 connects, and the other end of the primary coil of the transformer T5 is by the resistance R116 for connecting and pole Property electric capacity C92 ground connection；Drawn with the 2nd of four-wire interface terminal J10 the by resistance R13 one end of the secondary coil of the transformer T5 Pin connects, and the other end of the secondary coil of the transformer T5 connects with the 1st pin of four-wire interface terminal J10.

A kind of above-mentioned emergency communication main frame for having both inside and outside call function, it is characterised in that：The anti-side-tone circuit Connect with the 1st pin of the four-wire interface terminal J1 including transformer T2, one end of the secondary coil of the transformer T2, and By the primary coil of the nonpolar electric capacity C32, resistance R47, resistance R56 and the resistance R61 that are sequentially connected in series and the transformer T2 One end connect, one end of the primary coil of the transformer T2 also by resistance R60 with it is in parallel after resistance R59 one end and One end of nonpolar electric capacity C53 connects, the other end ground connection of the resistance R59 and nonpolar electric capacity C53 after parallel connection, the transformer The other end of the secondary coil of T2 connects with+12V the voltage output ends of extension set voltage supply control circuit, and by polar capacitor C34 is grounded, the centre tap ground connection of the primary coil of the transformer T2, and the other end of the primary coil of the transformer T2 is The connection end of the speech signal input YI_IN, the resistance R47 and resistance R56 of anti-side-tone circuit is the language of anti-side-tone circuit Sound signal output part YI_OUT.

A kind of above-mentioned emergency communication main frame for having both inside and outside call function, it is characterised in that：It is described output voice every Include transformer T1 from filter circuit, one end of the primary coil of the transformer T1 is by inductance L7 and gsm module GU900Q The 22nd pin connect, and pass through in parallel nonpolar electric capacity C16 and nonpolar electric capacity C17 is grounded；The transformer T1's is first The other end of level coil is connected by inductance L8 with the 21st pin of gsm module GU900Q, and by nonpolar electric capacity in parallel C29 and nonpolar electric capacity C31 is grounded；The nonpolar electric capacity of parallel connection is connected between the two ends of the primary coil of the transformer T1 C22 and nonpolar electric capacity C23, one end of the secondary coil of the transformer T1 is the output for exporting voice isolation filter circuit End, the other end ground connection of the secondary coil of the transformer T1；

The output audio resistance-capacitance coupling filter circuit includes resistance R37, nonpolar electric capacity C19 and nonpolar electric capacity C21, Output end of the one end of one end of the resistance R37 and nonpolar electric capacity C21 with output voice isolation filter circuit connects, institute The one end for stating nonpolar electric capacity C19 connects with the other end of resistance R37, and the other end of the nonpolar electric capacity C19 is output sound The output end of frequency resistance-capacitance coupling filter circuit, and be grounded by resistance R38；

The output audio amplifier circuit includes chip TDA2003 and polar capacitor C20, the 1st of the chip TDA2003 the Pin is connected by nonpolar electric capacity C18 with the output end of output audio resistance-capacitance coupling filter circuit, the chip TDA2003's 2nd pin is grounded by the nonpolar electric capacity C33 and resistance R43 for connecting, the 5th pin and the extension set electricity of the chip TDA2003 Press+12V the voltage output ends of supply control circuit to connect, and be grounded by nonpolar electric capacity C25, the chip TDA2003's 3rd pin and the 6th pin are grounded, and the 4th pin of the chip TDA2003 connects with the positive pole of polar capacitor C20, and passes through Resistance R39 connects with the connection end of nonpolar electric capacity C33 and resistance R43, the negative pole and anti-side-tone circuit of the polar capacitor C20 Speech signal input YI_IN connect, and pass through connect nonpolar electric capacity C24 and resistance R41 be grounded.

A kind of above-mentioned emergency communication main frame for having both inside and outside call function, it is characterised in that：The input voice resistance Holding coupling filter circuit includes resistance R55, nonpolar electric capacity C39 and nonpolar electric capacity C43, the one of the nonpolar electric capacity C39 End connects with the voice signal output end YI_OUT of anti-side-tone circuit, and the other end of the nonpolar electric capacity C39 is by series connection Resistance R55 and nonpolar electric capacity C43 is grounded；

The input voice filtering and amplifying circuit includes the operational amplifier U5A in operational amplifier chip LM358, described 8th pin of operational amplifier chip LM358 is connected by resistance R44 with the+5V voltage output ends of linear voltage-stabilizing circuit, and logical Cross nonpolar electric capacity C37 ground connection, the 4th pin ground connection of the operational amplifier chip LM358；The operational amplifier U5A's In-phase input end is connected by resistance R48 with the+5V voltage output ends of linear voltage-stabilizing circuit, and is grounded by resistance R51；It is described The inverting input of operational amplifier U5A is connected by resistance R52 with the connection end of resistance R55 and nonpolar electric capacity C43, and logical Cross nonpolar electric capacity C44 ground connection；Resistance R62 is connected between the output end and inverting input of the operational amplifier U5A, it is described The inverting input of operational amplifier U5A is grounded by the nonpolar electric capacity C51 and resistance R63 for connecting, the operational amplifier The connection end that the output end of U5A passes through nonpolar electric capacity C52 and nonpolar electric capacity C51 and resistance R63 with the connection end of resistance R62 Connect, the one end of the output end of the operational amplifier U5A also with the resistance R53 after parallel connection and nonpolar electric capacity C42 connects, and The other end of resistance R53 and nonpolar electric capacity C42 after connection is the output end for being input into voice filtering and amplifying circuit；

The input voice output buffer circuit includes the operational amplifier U5B in operational amplifier chip LM358, described The in-phase input end of operational amplifier U5B is connected by resistance R54 with the output end of input voice filtering and amplifying circuit, the fortune The output end for calculating amplifier U5B is the output end for being input into voice output buffer circuit, and with the anti-phase input of operational amplifier U5B End connects, and is connected with one end of resistance R57 with the nonpolar electric capacity C45 after parallel connection by nonpolar electric capacity C41；After parallel connection The other end ground connection of nonpolar electric capacity C45 and resistance R57；

The input voice isolation filter circuit include transformer T3, one end of the primary coil of the transformer T3 with it is defeated The output end for entering voice output buffer circuit connects, the other end ground connection of the primary coil of the transformer T3, the transformer One end of the secondary coil of T3 connects with the 19th pin of gsm module GU900Q, and by parallel nonpolar electric capacity C40 and non- Polar capacitor C38 is grounded；The other end of the secondary coil of the transformer T3 connects with the 20th pin of gsm module GU900Q； And be grounded by nonpolar electric capacity C48 and nonpolar electric capacity C49 in parallel, between the two ends of the secondary coil of the transformer T3 It is connected to the nonpolar electric capacity C46 and nonpolar electric capacity C47 of parallel connection.

The present invention has advantages below compared with prior art：

1st, simple structure of the present invention, reasonable in design, and small volume is easy to install.

2nd, the present invention has both inside and outside call function, and internal intercommunication call function and outside intercommunication call function are carried out It is effectively combined, outside intercommunication call realizes that wireless talkback side is not limited by region, occasion, Neng Goushe based on GSM network Put in mine, tunnel, factory building, in skyscraper, hoistway, in confined space etc., and installed and line upkeep without wiring, only External call can be all carried out in the case where there are good GSM signals to cover, with very big convenience, rescue party can be by Fixed night shift room is expanded to mobile mobile phone, considerably increases rescue efficiency and reliability.

3rd, voice signal is processed present invention employs gsm module GU900Q and chip TDA2003, voice response speed Degree is fast, and substantially, functional reliability is high for filter effect.

4th, distress call detection circuit of the invention can be by comparator chip LM393 to the calling from call button Fast reaction is made in action, and is sent to gsm module in real time, and facilitating staff can in time take rapidly corresponding rescue Measure, reduces the life danger of user.

5th, the strong antijamming capability of speed signal processing circuit of the present invention, can effectively ensure to lead to when there is external interference Words quality, and cost of implementation is low, functional reliability and job stability are high.

6th, power circuit of the invention can realize uninterrupted power supply, and operating efficiency and functional reliability are high, power-off, After shake etc. in major accident, i.e., in the case of the outside exchange electricity suppl without 220V, by the deposit of rechargeable battery electric energy, Neng Goubao Reliably working more than 12 hours under the card state of emergency.

7th, transmission range of the invention is unrestricted, and long haul communication can be realized by GSM network.

8th, the present invention coordinates emergency communication extension set of the prior art, external mobile telephone (mobile phone) composition emergency communication system It is on duty without night shift room personnel 24 hours after system, urgent call in 24 hours can be realized, and cost of serving is low.

9th, it is of the invention due to being provided with gsm module, therefore by after secondary development extension, additionally it is possible to realize SMS alarm work( Can, to accomplish that the alarm of multimode reliability is provided convenience.

10th, the present invention coordinates emergency communication extension set of the prior art, external mobile telephone (mobile phone) composition emergency communication After system, the system expandability is good, and external mobile telephone (mobile phone) can be moved everywhere, without carrying out troublesome track remodelling, System upgrade extends unrestricted.

11st, of the invention practical, using effect is good, is easy to promote the use of.

In sum, simple structure of the present invention, reasonable in design, easy to install, and voice response speed is fast, can realize Long haul communication, speech quality is high, and functional reliability is high, can realize urgent call in 24 hours, practical, is easy to popularization to make With.

Below by drawings and Examples, technical scheme is described in further detail.

Brief description of the drawings

Fig. 1 is structural representation of the invention.

Fig. 2 is the structural representation of host shell bottom of the present invention.

Fig. 3 is schematic block circuit diagram of the invention.

Fig. 4 is the circuit theory diagrams for inventing isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit.

Fig. 5 is invention rechargeable battery, power supply switch circuit, power indicating circuit, battery charger, battery protecting circuit With the circuit connecting relation schematic diagram of battery voltage detection circuit.

Fig. 6 is the electricity of the non-isolated Boost circuit of invention, linear voltage-stabilizing circuit and extension set voltage supply control circuit Road annexation schematic diagram.

Fig. 7 is the circuit connecting relation schematic diagram of gsm module of the present invention and intercommunication button.

Fig. 8 is the circuit theory diagrams of the low indicating circuit of battery electric quantity of the present invention.

Fig. 9 is the circuit theory diagrams of SIM card holder of the present invention.

Figure 10 is the circuit connecting relation schematic diagram of watchdog circuit of the present invention and reset circuit.

Figure 11 is the circuit theory diagrams of GSM network signal indicating circuit of the present invention.

Figure 12 is the circuit theory diagrams of buzzer circuit of the present invention.

Figure 13 is the circuit connecting relation schematic diagram of distress call detection circuit of the present invention and extension set Interface Terminal.

Figure 14 is the circuit connecting relation schematic diagram of talkback handle Interface Terminal of the present invention and talkback handle speaking circuit.

Figure 15 is the circuit theory diagrams of handle on-hook detection button circuit of the present invention.

Figure 16 is the circuit theory diagrams of anti-side-tone circuit of the present invention.

Figure 17 is put for present invention output voice isolation filter circuit, output audio resistance-capacitance coupling filter circuit and output audio The circuit connecting relation schematic diagram of big circuit.

Figure 18 is defeated for present invention input voice resistance-capacitance coupling filter circuit, input voice filtering and amplifying circuit, input voice Go out the circuit connecting relation schematic diagram of buffer circuit and input voice isolation filter circuit.

Description of reference numerals:

1-host shell；2-handle groove；3-talkback handle；

4-talkback handle speaking circuit；5-talkback handle Interface Terminal；6-rechargeable battery；

7-isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit；8-power supply switch circuit；

9-battery charger；10-battery protecting circuit；11-battery voltage detection circuit；

12-power indicating circuit；13-non-isolated Boost circuit；

14-power indicating circuit；15-linear voltage-stabilizing circuit；

16-extension set voltage supply control circuit；17-call signal indicator lamp；

18-gsm module；19-distress call detects circuit；20-GSM antenna；

21-watchdog circuit；22-reset circuit；23-GSM network signal indicating circuit；

The low indicator lamp of 24-battery electric quantity；25-GSM network signal lamp；

26-output voice isolation filter circuit；27-output audio resistance-capacitance coupling filter circuit；

28-output audio amplifier circuit；29-input voice resistance-capacitance coupling filter circuit；

30-input voice filtering and amplifying circuit；31-input voice output buffer circuit；

32-input voice isolation filter circuit；33-extension set Interface Terminal；

34-power supply terminal；35-antenna pedestal；36-battery cover；

37-handle on-hook detection button；38-intercommunication button；

39-buzzer circuit；The low indicating circuit of 40-battery electric quantity；

41-anti-side-tone circuit；42-handle on-hook detection button circuit；43-hanging rail；

44-SIM card holder.

Specific embodiment

As shown in figure 1, the present invention including host shell 1 and be arranged on the top of host shell 1 handle groove 2 and intercommunication by Button 38, is hung with talkback handle 3 on the handle groove 2, the host shell 1 is internally provided with power circuit, main frame inside and outside Speaking circuit and talkback handle speaking circuit 4, are provided with for connecting talkback handle 3 in the talkback handle speaking circuit 4 Talkback handle Interface Terminal 5, the talkback handle Interface Terminal 5 is exposed at the side of host shell 1；

As shown in figure 3, the power circuit includes rechargeable battery 6 and for 220V alternating currents to be converted into+4.9V voltages Isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit 7, and for selecting 220V AC-powereds or rechargeable battery 6 to power simultaneously The power supply switch circuit 8 of+4.2V voltages is exported, the isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit 7 and rechargeable battery 6 are equal Connect with power supply switch circuit 8, the output of the isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit 7 is terminated with and rechargeable battery 6 battery chargers 9 for connecting, be connected on the battery for rechargeable battery 6 is carried out additives for overcharge protection, over, The battery protecting circuit 10 of overcurrent protection, short-circuit protection and high temperature protection, the output of the rechargeable battery 6 is terminated with cell voltage Detection circuit 11, the output of the power supply switch circuit 8 is terminated with power indicating circuit 12 and for being by+4.2V voltage conversions The non-isolated Boost circuit 13 of+12V voltages, the power indicating circuit 12 includes being exposed at the side of host shell 1 Power supply indicator 14, the output point two-way of the non-isolated Boost circuit 13, is connected to for+12V voltages to be turned all the way Be changed to the linear voltage-stabilizing circuit 15 of+5V voltages, another road be connected to for control+12V voltage outputs to emergency communication extension set point Electromechanics pressure supply control circuit 16, the extension set voltage supply control circuit 16 includes being exposed at the calling of the side of host shell 1 Signal lamp 17；

As shown in figure 3, main frame inside and outside speaking circuit includes gsm module 18 and connects with the gsm module 18 SIM card holder 44, GSM antenna 20, watchdog circuit 21, reset circuit 22 and speed signal processing circuit, the cell voltage Detect that the output end of circuit 11 connects with the input of gsm module 18, the input of the gsm module 18 is further connected with distress call Detection circuit 19 and handle on-hook detection button circuit 42, the handle on-hook detection button circuit 42 include being exposed at handle groove Handle on-hook detection button 37 on 2, the handle on-hook detection button circuit 42 is connected with talkback handle speaking circuit 4, institute State battery charger 9 and extension set voltage 16 output end with gsm module 18 of supply control circuit connects, the gsm module 18 output end is further connected with the low indicating circuit 40 of buzzer circuit 39, battery electric quantity and GSM network signal indicating circuit 23, described The low indicating circuit 40 of battery electric quantity includes being exposed at the low indicator lamp 24 of battery electric quantity of the side of host shell 1, the GSM network letter Number indicating circuit 23 includes being exposed at the GSM network signal lamp 25 of the side of host shell 1, the speed signal processing circuit Including output voice modulate circuit, input voice modulate circuit and anti-side-tone circuit 41, the output voice modulate circuit includes Output voice isolation filter circuit 26, output audio resistance-capacitance coupling filter circuit 27 and the output audio amplifier circuit for connecting successively 28, the output voice isolation filter circuit 26 connects with the output end of gsm module 18, the output audio amplifier circuit 28 Output end connects with anti-side-tone circuit 41, and the input voice modulate circuit includes the input voice resistance-capacitance coupling filter for connecting successively Wave circuit 29, input voice filtering and amplifying circuit 30, input voice output buffer circuit 31 and input voice isolation filter circuit 32, the input of the input voice resistance-capacitance coupling filter circuit 29 connects with anti-side-tone circuit 41, the input voice isolation The output end of filter circuit 32 connects with the input of gsm module 18；As shown in Fig. 2 the bottom of the host shell 1 be provided with it is outstanding Hang guide rail 43, the extension set Interface Terminal 33 for connecting emergency communication extension set, the supply terminals for connecting 220V alternating currents The son 34, antenna pedestal 35 for connecting GSM antenna 20 and the battery cover 36 for dismounting cell, on the extension set Interface Terminal 33 Be provided be connected for the signal output part with emergency communication extension set extension set signal wire interface, for emergency communication extension set + 12V positive source the interfaces of the extension set ground connection line interface of earth terminal connection, the positive source for connecting outside+12V electrical appliances With+12V power cathode the interfaces of the power cathode for connecting outside+12V electrical appliances, distress call detection circuit 19, Anti-side-tone circuit 41 and talkback handle speaking circuit 4 are connected with extension set signal wire interface ,+12V positive sources the interface with Extension set voltage supply control circuit 16 is connected, the isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit 7 and power supply terminal 34 connections.During specific implementation, emergency communication extension set is by extension set holding wire (copper core cable of two diameters not less than 2mm) connection On extension set Interface Terminal 33, power supply terminal 34 is connected on 220V alternating currents by power line.Led by setting suspension Rail 43, facilitates engineering site installation.

The power circuit can realize uninterrupted power supply, and whole emergency communication main frame mainly has three kinds of different power supply electricity Pressure value, one be+12V supply voltage, be mainly used in the handle on-hook detection button circuit 42 of emergency communication main frame, disappear side Each emergency communication extension set in sound circuit 41 and output audio amplifier circuit 28 and emergency communication system is powered；Another is The supply voltage of+5V, is mainly used in being powered to distress call detection circuit 19 and input voice filtering and amplifying circuit 30；3rd It is the supply voltage of+4.2V, it is mainly used in being powered to gsm module 18, because gsm module 18 is to be in long-term work state, It is higher for power supply conversion efficiency requirement, so 220V is exchanged using isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit 7 Electricity is converted to+4.9V voltages, then selects 220V AC-powereds or rechargeable battery 6 to power by power supply switch circuit 8, improves electricity While the operating efficiency of source, the reliability of power supply is improve, in the case where outside is without 220V exchange electricity suppls by the electricity that charges The deposit of the electric energy of pond 6, ensure that reliably working more than 12 hours under the state of emergency.Specifically, the work of the power circuit It is as principle：When there is 220V alternating currents to supply, 220V alternating currents drop by isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit 7 Pressure, output+4.9V voltages are divided into two-way, and all the way by battery charger 9 for rechargeable battery 6 charges, another road is by power supply Switching circuit 8 is further divided into two-way after being converted to+4.2V voltages, is powered to gsm module 18 all the way, and another road leads to non-isolated Boost circuit 13 boosts to+12V voltages, and then+12V voltages are divided into two-way output, and the first via is to emergency communication main frame Handle on-hook detection button circuit 42, anti-side-tone circuit 41 and output audio amplifier circuit 28 and emergency communication system in it is each Individual emergency communication extension set is powered, and another road is after linear voltage-stabilizing circuit is converted to+5V voltages for distress call detects circuit 19 Powered with input voice filtering and amplifying circuit 30；When no 220V alternating currents are supplied, rechargeable battery 6 discharges, power supply switching electricity The selection rechargeable battery 6 of road 8 is emergency communication host supplying power, and specific system power flow topological relation is with 220V AC-powereds.

As shown in fig. 7, in the present embodiment, the gsm module 18 is gsm module GU900Q, the gsm module GU900Q's 1st pin is grounded by resistance R75, and the 7th pin of the gsm module GU900Q is by resistance R66 and gsm module GU900Q's 15th pin connects, and the 15th pin of the gsm module GU900Q is by nonpolar electric capacity C62 and nonpolar electric capacity in parallel C63 is grounded, and the 34th pin of the gsm module GU900Q is connected by resistance R79 with the 15th pin of gsm module GU900Q, 35th pin of the gsm module GU900Q is grounded by resistance R78, and the 26th pin of the gsm module GU900Q is by non- Polar capacitor C61 is grounded, and+4.2V the voltages of the 55th~57 pin of the gsm module GU900Q with power supply switch circuit 8 are defeated Go out end to connect, and be grounded by nonpolar electric capacity C58 in parallel, nonpolar electric capacity C59, polar capacitor C60 and resistance R58；GSM Module GU900Q is the GSM/GPRS wireless modules of a support two-band 900MHz/1800MHz, and small volume, integrated level is high, branch Hold multi-link；The maximum electric current of work is 220mA, the small cause 1.2mA of standby current；Operating voltage is direct current 3.5V to 4.5V； In terms of acoustic processing, the functions such as recording and echo suppress, sound output size is controlled are supported, can well meet the present invention Use demand.1st pin of the gsm module GU900Q is start control pin, after upper electricity, the gsm module GU900Q The 1st pin level be automatically pulled by resistance R75 it is low, so as to start gsm module GU900Q be operated.Gsm module 15th pin of GU900Q is the 2.8V linear voltages source output interface of gsm module GU900Q, and maximum output current is 80mA, defeated The 2.8V linear voltages for going out can act as the I/O interface level translation voltage source of gsm module GU900Q, for example, the gsm module 7th pin of GU900Q is connected to the 2.8V linear voltages source by pull-up resistor R66, and the 34th of the gsm module GU900Q draws Pin is connected to the 2.8V linear voltages source by pull-up resistor R79.

As shown in figure 13, in the present embodiment, the extension set Interface Terminal 33 is four-wire interface terminal J1, the four-wire interface 1st pin of terminal J1 is extension set ground connection line interface for the 2nd pin of extension set signal wire interface CH, the four-wire interface terminal J1 3rd pin of GND, the four-wire interface terminal J1 be+12V power cathodes interface-, the 4th of the four-wire interface terminal J1 draws Pin be+12V positive sources interface+, the pole of rectification two that negative electrode connects with it is connected on the 4th pin of the four-wire interface terminal J1 The anode of pipe D30, the commutation diode D30 connects with+12V the voltage output ends of extension set voltage supply control circuit 16.

As shown in figure 4, in the present embodiment, the power supply terminal 34 is two line interface terminal J9, the isolated list Holding reverse exciting switching voltage regulator reduction voltage circuit 7 includes chip VIPER22AS-E, light-coupled isolation chip JC817, three-terminal voltage-stabilizing chip CYT431A, rectifier DZ, the transformer T4 with a primary coil and two secondary coils, fast recovery diode D24, Commutation diode D29, polar capacitor C66 and Schottky diode D25, one end of the primary coil of the transformer T4 and rectification The cathode voltage output end of device DZ and the positive pole of polar capacitor C66 connect, and by resistance R84 and nonpolar electric capacity in parallel C67 connects with the negative electrode of fast recovery diode D24, an ac input end of the rectifier DZ and two line interface terminal J9 The 1st pin connect, another ac input end of the rectifier DZ pass through fuse F1 and two line interface terminal J9 the 2nd Pin connects, and the cathode voltage output end of the rectifier DZ and the negative pole of polar capacitor C66 are grounded；The chip 5th pin of VIPER22AS-E, the 6th pin, the anode and change of the 7th pin and the 8th pin with fast recovery diode D24 The other end of the primary coil of depressor T4 connects, and the 1st pin and the 2nd pin of the chip VIPER22AS-E are grounded, described 3rd pin of chip VIPER22AS-E connects with the 3rd pin of chip JC817, and is grounded by nonpolar electric capacity C76, described 4th pin of chip VIPER22AS-E is connected by resistance R92 with the negative electrode of commutation diode D29, and by resistance R93 with 4th pin of chip JC817 connects, and by nonpolar electric capacity C77 be grounded, the anode of the commutation diode D29 with it is described One end of one secondary coil of transformer T4 connects, the other end ground connection of a secondary coil of the transformer T4；It is described 1st pin of chip JC817 is connected by resistance R91 with the negative electrode of Schottky diode D25, and by resistance R94 and chip 2nd pin of JC817 and the negative terminals of three-terminal voltage-stabilizing chip CYT431A connect, the three-terminal voltage-stabilizing chip CYT431A's Positive terminal is grounded, and the Voltage Reference end of the three-terminal voltage-stabilizing chip CYT431A passes through resistance R95 and Schottky diode The negative electrode of D25 connects, and is grounded by resistance R97, the anode of the Schottky diode D25 and another time of transformer T4 One end of level coil connects, and resistance R87 and the negative electrode phase of nonpolar electric capacity C68 and Schottky diode D25 by connecting Connect, the other end ground connection of another secondary coil of the transformer T4, the negative electrode of the Schottky diode D25 is isolated + 4.9V the voltage output ends of single-ended reverse exciting switching voltage regulator reduction voltage circuit 7, and be grounded by polar capacitor C70；220V alternating currents from Two line interface terminal J9 are introduced, by after rectifying and wave-filtering, input voltage is added in the primary coil of transformer T4 (between pin 1 and 2 Coil) on, the 5th pin of chip VIPER22AS-E, the 6th pin, the 7th pin and the 8th pin are chip VIPER22AS-E The drain electrode input of internal metal-oxide-semiconductor, when chip VIPER22AS-E inside metal-oxide-semiconductor is turned on, the primary current of transformer T4 Linearly increasing, transformer T4 converts electrical energy into Magnetic Energy Storage wherein, the secondary coil of transformer T4 (pin 4 and 5 it Between coil) Same Name of Ends it is opposite with the Same Name of Ends of the primary coil so that Schottky diode D29 ends because reverse-biased, become The secondary coil no current of depressor T4 flows through, not for chip VIPER22AS-E provides power supply；When in chip VIPER22AS-E When portion's metal-oxide-semiconductor is turned off, the primary current vanishing of transformer T4, secondary coil induced voltage of transformer T4 makes Xiao Te Based diode D29 positively biaseds and turn on, be stored in magnetic energy in a primary coil of transformer T4 by Mutual Inductance Coupling to this time In level coil, transformer T4 releases energy, and the secondary current of transformer T4 linearly reduces, and is chip VIPER22AS-E Power supply is provided.Meanwhile, when chip VIPER22AS-E inside metal-oxide-semiconductor is turned on, the primary current of transformer T4 linearly increases Plus, transformer T4 converts electrical energy into Magnetic Energy Storage wherein, and another secondary coil of transformer T4 is (between pin 10 and 6 Coil) Same Name of Ends it is opposite with the Same Name of Ends of the primary coil so that Schottky diode D25 ends because reverse-biased, transformation The secondary coil no current of device T4 flows through, and load only provides electric energy by nonpolar electric capacity C70；When in chip VIPER22AS-E When portion's metal-oxide-semiconductor is turned off, the primary current vanishing of transformer T4, secondary coil induced voltage of transformer T4 makes Xiao Te Based diode D25 positively biaseds and turn on, be stored in magnetic energy in the primary coil of transformer T4 by Mutual Inductance Coupling to secondary coil In, transformer T4 is released energy, and the secondary current of transformer T4 linearly reduces, and voltage is not now to rear class in a steady stream not Disconnected output.In addition, another secondary coil (line between pin 10 and 6 of chip VIPER22AS-E also receiving transformer T4 Circle) output voltage feedback, so as to transformer T4 output voltages adjustment in a value for stabilization, specific feedback principle For：When transformer T4 output voltages are raised suddenly, due to resistance R95 and resistance R97 series connection connection on the output voltage, therefore point Pressure is also raised, and partial pressure value is input to the Voltage Reference end of three-terminal voltage-stabilizing chip CYT431A, and three-terminal voltage-stabilizing chip CYT431A's leads Logical degree just increases, immediately the diode end conducting increase inside light-coupled isolation chip JC817, and then, chip VIPER22AS-E Feedback reception end, i.e. the 3rd pin electric current increase, now make chip VIPER22AS-E inside metal-oxide-semiconductor duty cycle of switching under Drop, the energy of transformer T4 couplings declines, so just completing the reduction of output voltage, this is a mistake for complete negative-feedback Journey, if output voltage reduction, then the switch PWM ripple dutycycle increase of chip VIPER22AS-E inside metal-oxide-semiconductor, immediately Increase output voltage.

As shown in figure 5, in the present embodiment, the power supply switch circuit 8 is including PMOS Q14, commutation diode D26 and soon Recovery diode D35, the grid of the PMOS Q14 and the anode of commutation diode D26 are switched with isolated single-ended reverse exciting + 4.9V the voltage output ends of power voltage step down circuit 7 connect, the drain electrode of the PMOS Q14 and the anode of fast recovery diode D35 Positive pole with rechargeable battery 6 connects, the source electrode of the PMOS Q14 and the negative electrode of fast recovery diode D35 with rectification two The negative electrode of pole pipe D26 connects and is the+4.2V voltage output ends of power supply switch circuit 8；When there is 220V alternating currents from power supply wiring When terminal 34 is accessed, the anode presence+4.9V voltages of commutation diode D26, by after the 0.7V pressure drops of commutation diode D26, It is changed into+4.2V, is exported from the negative electrode of commutation diode D26, supply subsequent conditioning circuit is used；Now, the grid of PMOS Q14 is height Level, threshold voltage of the voltage difference less than PMOS Q14 conductings between the grid and source electrode of PMOS Q14, PMOS Q14 cuts Only, now the discharge loop of rechargeable battery 6 is truncated, and rechargeable battery 6 does not discharge.When 220V alternating currents break suddenly, rectification The anode voltage of diode D26 is changed into 0 in moment, now PMOS Q14 conductings, by rechargeable battery 6 for subsequent conditioning circuit is powered, its In, fast recovery diode D35 can quickly provide the discharge loop of rechargeable battery 6 and add.

As shown in figure 5, in the present embodiment, the power supply indicator 14 is light emitting diode D2, the power indicating circuit The 12 also anodes including resistance R9, the light emitting diode D2 are by resistance R9 and the+4.2V voltage outputs of power supply switch circuit 8 End connects, the minus earth of the light emitting diode D2；

As shown in fig. 6, in the present embodiment, the non-isolated Boost circuit 13 includes switching power source chip 8th pin of MC34063A, Schottky diode D34 and polar capacitor C87, the switching power source chip MC34063A is by string The resistance R103 and resistance R104 of connection connect with+4.2V the voltage output ends of power supply switch circuit 8, the switching power source chip 6th pin of MC34063A connects with+4.2V the voltage output ends of power supply switch circuit 8, the switching power source chip 7th pin of MC34063A connects with the connection end of resistance R103 and resistance R104, and by inductance L10 and switching power source chip 1st pin of MC34063A and the anode of Schottky diode D34 connect, the negative electrode of the Schottky diode D34 for it is non-every From formula Boost circuit 13+12V voltage output ends and connect with the positive pole of polar capacitor C87, the polar capacitor C87 Negative pole ground connection, the 5th pin of the switching power source chip MC34063A is grounded by resistance R108, and by resistance R107 and The negative electrode of Schottky diode D34 connects, and the 3rd pin of the switching power source chip MC34063A passes through nonpolar electric capacity C81 Ground connection；1st pin of switching power source chip MC34063A is the drain electrode that chip internal switchs metal-oxide-semiconductor, when chip internal switchs MOS When pipe is turned on, that is, the 1st pin of switching power source chip MC34063A is when internally turning on, power supply (i.e. power supply switch circuit 8 + 4.2V the voltages of output) through the 1st pin and the 2nd pin of resistance R104 and inductance L10 and switching power source chip MC34063A Ground connection, now inductance L10 starts storage energy, and provides energy to load by polar capacitor C87；When chip internal switchs MOS When pipe disconnects, power supply (i.e.+4.2V voltages of the output of power supply switch circuit 8) and inductance L10 are simultaneously to load and polar capacitor C87 Energy is provided.Inductance L10 sections during release energy, electromotive force polarity by inductance L10 two ends with connect power supply (i.e. power supply + 4.2V the voltages of the output of switching circuit 8) polarity is identical, source-series equivalent to two voltages, so the voltage obtained in load is high In power supply (i.e.+4.2V voltages of the output of power supply switch circuit 8) voltage, the conducting of this circuit chip internal switch metal-oxide-semiconductor and shut-off Frequency be referred to as the working frequency of switching power source chip MC34063A, the time constant of this frequency relative load is sufficiently high, so Continuous DC voltage can be obtained in load.

As shown in fig. 6, in the present embodiment, the linear voltage-stabilizing circuit 15 includes voltage stabilizing chip LM7805, the voltage stabilizing core 1st pin of piece LM7805 connects with+12V the voltage output ends of non-isolated Boost circuit 13, and by nonpolar electricity Hold C83 ground connection；The 2nd pin ground connection of the voltage stabilizing chip LM7805, the 3rd pin of the voltage stabilizing chip LM7805 is linear steady + 5V the voltage output ends of volt circuit 15, and be grounded by nonpolar electric capacity C86；The linear voltage-stabilizing circuit 15 is to call for help letter The operational amplifier chip in comparator chip LM393 and input voice filtering and amplifying circuit 30 in number detection circuit 19 What LM358 powered, the rated disspation of comparator chip LM393 and operational amplifier chip LM358 is 0.5W, so comparator Chip LM393 and operational amplifier chip LM358 overall power consumption is very low, only 1W；From+12V voltages to+5V voltages Voltage conversion, the conversion efficiency for power supply is less demanding, but requires that power supply noise is small, so using voltage stabilizing chip LM7805, can obtain a reliable and stable ,+5V voltage output that noise is small；The stability of voltage stabilizing chip LM7805 is high, it is easy to Buying, cheap, maximum power dissipation can reach 7.5W, but also with overload protection and short-circuit protection function.

As shown in fig. 6, in the present embodiment, the call signal indicator lamp 17 is light emitting diode D1, the extension set voltage Supply control circuit 16 also includes that triode Q1, triode Q17 and the base stage of triode Q28, the triode Q1 pass through resistance R10 connects with the 7th pin of gsm module GU900Q, and is grounded by nonpolar electric capacity C3, and the emitter stage of the triode Q1 connects Ground, the colelctor electrode of the triode Q1 is connected by resistance R68 with the base stage of triode Q17 and the colelctor electrode of triode Q28, and Connected with the negative electrode of light emitting diode D1 by resistance R8；The emitter stage of the triode Q17 and the base stage of triode Q28 are led to Resistance R325 is crossed to connect with+12V the voltage output ends of non-isolated Boost circuit 13, the light emitting diode D1 with it is non- + 12V the voltage output ends of isolated Boost circuit 13 connect, the current collection extremely extension set voltage supply of the triode Q17 Control+12V the voltage output ends of circuit 16；Extension set voltage supply control circuit 16 is emergency communication main frame and emergency communication extension set Between power supply connection key, the power supply of emergency communication extension set can be controlled by extension set voltage supply control circuit 16； Specifically, when the 7th pin of gsm module GU900Q exports low level, triode Q1 is in cut-off state, now triode Q17 does not have bias voltage to produce, so that triode Q17 is also at cut-off state, now non-isolated Boost circuit + 12V the voltages of 13 outputs cannot be transferred to the colelctor electrode of triode Q17, the i.e. output end of extension set voltage supply control circuit 16, Emergency communication main frame and emergency communication extension set are in holding state；When the 7th pin of gsm module GU900Q exports high level, Triode Q1 is in the conduction state, and now triode Q17 has enough bias voltages and produces, so that triode Q17 In the conduction state ,+12V the voltages of the now output of non-isolated Boost circuit 13 can be transferred to the collection of triode Q17 Electrode, the i.e. output end of extension set voltage supply control circuit 16, can power for late-class circuit.

As shown in figure 5, in the present embodiment, the rechargeable battery 6 is lithium battery BT1, the battery voltage detection circuit 11 Including resistance R99 and resistance R100, one end of the resistance R99 and one end of resistance R100 are with the of gsm module GU900Q 25 pins connect, and the other end of the resistance R99 connects with the positive pole of lithium battery BT1, the other end ground connection of the resistance R100；

As shown in figure 5, in the present embodiment, the battery charger 9 includes triode Q15, triode Q16 and rectification two The base stage of pole pipe D33, the triode Q16 is connected by resistance R102 with the 41st pin of gsm module GU900Q, three pole The grounded emitter of pipe Q16, the base stage of the triode Q15 is connected by resistance R101 with the colelctor electrode of triode Q16, described The emitter stage of triode Q15 connects with+4.9V the voltage output ends of isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit 7, described The colelctor electrode of triode Q15 connects with the anode of commutation diode D33, and the negative electrode of the commutation diode D33 passes through resistance R98 Positive pole with lithium battery BT1 connects；When the voltage that battery voltage detection circuit 11 detects rechargeable battery 6 is less than 3.6V, GSM The 41st pin output high level of module GU900Q, triode Q16 conductings, so that triode Q15 is also switched on, rechargeable battery 6 Charge circuit is set up, into charged state；When the voltage that battery voltage detection circuit 11 detects rechargeable battery 6 reaches 4.2V When, the 41st pin output low level of gsm module GU900Q, triode Q16 cut-offs, so that triode Q15 is also switched off, charge electricity The charge circuit cut-out in pond 6, stops charging.

As shown in figure 5, in the present embodiment, the battery protecting circuit 10 includes Li battery protection IC DW01, NMOS tube The positive pole phase that 5th pin of Q15 and NMOS tube Q16, the Li battery protection IC DW01 passes through resistance R109 and lithium battery BT1 Connect, and connected with the negative pole of lithium battery BT1 by nonpolar electric capacity C88, the 6th pin of the Li battery protection IC DW01 and Negative pole of the source electrode of NMOS tube Q15 with lithium battery BT1 connects, the 1st pin and NMOS of the Li battery protection IC DW01 The grid of pipe Q15 connects, and the 3rd pin of the Li battery protection IC DW01 connects with the grid of NMOS tube Q16, the NMOS The drain electrode of pipe Q15 connects with the drain electrode of NMOS tube Q16, the source ground of the NMOS tube Q16, the Li battery protection IC 2nd pin of DW01 is grounded by resistance R96.The voltage of rechargeable battery 6 is detected due to depending merely on battery voltage detection circuit 11, And by battery charger 9 for the charging of rechargeable battery 6 is less reliable, therefore present invention adds battery protecting circuit 10, Additives for overcharge protection, over, overcurrent protection, short-circuit protection and high temperature protection are carried out to rechargeable battery 6, and is specifically being installed When, Li battery protection IC DW01 is close to rechargeable battery installation.Specifically protection process is：During normal condition, li-ion cell protection The supply voltage of chip DW01 is the voltage of rechargeable battery 6, now, the 1st pin of Li battery protection IC DW01 and the 3rd pin High level is exported, NMOS tube Q15 and NMOS tube Q16 is in conducting state, and the discharge and recharge of rechargeable battery 6 can be carried out； During overcharge condition, the voltage that Li battery protection IC DW01 detects the output of rechargeable battery 6 is higher than charging tolerance value, now, 3rd pin of Li battery protection IC DW01 is changed into low level, and by NMOS tube Q16 shut-offs, rechargeable battery 6 stops charging；Cross and put During electricity condition, Li battery protection IC DW01 detects the voltage of the output of rechargeable battery 6 less than discharge tolerance system, now, lithium electricity Pond protects the 1st pin of chip DW01 to be changed into low level, and by NMOS tube Q15 shut-offs, rechargeable battery 6 stops electric discharge, still chargeable； When rechargeable battery 6 discharges, because load change guiding discharge electric current it is excessive when, the 2nd pin of Li battery protection IC DW01 Voltage can be raised, and the 1st pin of Li battery protection IC DW01 is changed into low level, and by NMOS tube Q15 shut-offs, rechargeable battery 6 stops Only discharge, realize overcurrent protection；When short-circuit, the heavy-current discharge of rechargeable battery 6, when discharge current is excessive, li-ion cell protection The voltage of the 2nd pin of chip DW01 can be raised, and the 1st pin of Li battery protection IC DW01 is changed into low level, by NMOS tube Q15 is turned off, and rechargeable battery 6 stops electric discharge, realizes short-circuit protection；When 6 high temperature of rechargeable battery, Li battery protection IC DW01 High temperature is detected, NMOS tube Q15 and NMOS tube Q16 are turned off, rechargeable battery 6 stops charging and discharging.

As shown in figure 8, in the present embodiment, the low indicator lamp 24 of battery electric quantity is light emitting diode D20, the battery electricity The also base stage including triode Q12, the triode Q12 of low indicating circuit 40 is measured by resistance R71 and gsm module GU900Q's 40th pin connects, and is grounded by nonpolar electric capacity C54, and the colelctor electrode of the triode Q12 is by resistance R64 and luminous two The negative electrode of pole pipe D20 connects, the anode of the light emitting diode D20 and the+4.2V voltage output end phases of power supply switch circuit 8 Connect, the grounded emitter of the triode Q12；The emergency communication main frame is provided with rechargeable battery 6 as there is back-up source, works as inspection When measuring the voltage of rechargeable battery 6 less than 3.6V, the 40th pin output high level of gsm module GU900Q leads triode Q12 Logical, light emitting diode D20 is lighted, and represents not enough power supply signal.

In the present embodiment, the GSM antenna 20 connects with the 60th pin of gsm module GU900Q, as shown in figure 9, described SIM card holder 44 is the 1st pin and gsm module of SIM card holder ID1A-6S-2.54SF, the SIM card holder ID1A-6S-2.54SF 30th pin of GU900Q connects, and is grounded by nonpolar electric capacity C65, and the 2nd of the SIM card holder ID1A-6S-2.54SF draws Pin is connected by resistance R80 with the 33rd pin of gsm module GU900Q, the 3rd pin of the SIM card holder ID1A-6S-2.54SF Connected with the 32nd pin of gsm module GU900Q by resistance R81, the 4th pin of the SIM card holder ID1A-6S-2.54SF connects Ground, the 6th pin of the SIM card holder ID1A-6S-2.54SF passes through the 31st pin phase of resistance R82 and gsm module GU900Q Connect；

As shown in Figure 10, in the present embodiment, the watchdog circuit 21 includes chip PIC12F508, the chip 1st pin of PIC12F508 connects with the 15th pin of gsm module GU900Q, and the 3rd pin of the chip PIC12F508 leads to Cross resistance R77 to connect with the 16th pin of gsm module GU900Q, the 4th pin of the chip PIC12F508 passes through resistance R76 Connect with the 2nd pin of gsm module GU900Q, the 8th pin ground connection of the chip PIC12F508；By setting house dog electricity Road 21, can avoid the occurrence of crashing, and improve the reliability of work.15th pin of the gsm module GU900Q is defeated The 2.8V linear voltages for going out are powered for the chip PIC12F508.

As shown in Figure 10, in the present embodiment, the reset circuit 22 is by reset key K2, resistance R118 and nonpolar electric capacity C89 is constituted, and one end of one end, one end of resistance R118 and nonpolar electric capacity C89 of the reset key K2 is and gsm module 16th pin of GU900Q connects, and the other end of the resistance R118 connects with the 15th pin of gsm module GU900Q, described multiple The other end of position button K2 and the other end of nonpolar electric capacity C89 are grounded；The 15th pin output of the gsm module GU900Q 2.8V linear voltages power for the reset circuit 22.

As shown in figure 11, in the present embodiment, the GSM network signal lamp 25 is light emitting diode D21, the GSM The also base stage including triode Q13, the triode Q13 of network signal indicating circuit 23 passes through resistance R72 and gsm module 52nd pin of GU900Q connects, and is grounded by nonpolar electric capacity C55, and the colelctor electrode of the triode Q13 passes through resistance R65 Negative electrode with light emitting diode D21 connects, and the anode of the light emitting diode D21 is defeated with the+4.2V voltages of power supply switch circuit 8 Go out end to connect, the grounded emitter of the triode Q13；

As shown in figure 12, in the present embodiment, the buzzer circuit 39 includes buzzer LS2 and triode Q27, described three The base stage of pole pipe Q27 is connected by resistance R323 with the 42nd pin of gsm module GU900Q, and is grounded by resistance R324, institute The colelctor electrode for stating triode Q27 connects with the negative pole of buzzer LS2, positive pole and the power supply switch circuit 8 of the buzzer LS2 + 4.2V voltage output ends connect, the grounded emitter of the triode Q27；

As shown in figure 13, in the present embodiment, the distress call detection circuit 19 includes comparator chip LM393, two poles Pipe D5, the 2nd pin of the comparator chip LM393 connects with the positive pole of diode D5, and by parallel resistance R3 and non- Polar capacitor C1 connects with+5V the voltage output ends of linear voltage-stabilizing circuit 15, and the negative electrode of the diode D5 passes through the electricity connected Resistance R1 and inductance L1 connects with the 1st pin of the four-wire interface terminal J1, and the 3rd pin of the comparator chip LM393 leads to Cross resistance R4 to connect with+5V the voltage output ends of linear voltage-stabilizing circuit 15, and be grounded by resistance R11, the comparator chip 8th pin of LM393 connects with+5V the voltage output ends of linear voltage-stabilizing circuit 15, and the 4th of the comparator chip LM393 draws Pin is grounded, and the 1st pin of the comparator chip LM393 connects with the 3rd pin of gsm module GU900Q, and by resistance R5 Connect with the 15th pin of gsm module GU900Q；1st pin of the comparator chip LM393 is detected for the distress call The output end of circuit 19, on the one hand, export to the 3rd pin of gsm module GU900Q, on the other hand, by upper testing result Pull-up resistor R5 is connected to the 2.8V linear voltages source that the 15th pin of the gsm module GU900Q is provided.It is and described during specific implementation Emergency communication main frame is provided with and is connected to emergency communication extension set in supporting the use the emergency communication extension set for constituting emergency communication system Signal output part and earth terminal between call button, when user presses call button, be equal to be to connect four line 1st pin of mouth terminal J1 is grounded, and now, diode D5 is in the conduction state, and the 2nd of the comparator chip LM393 draws Pin voltage is 0.7V or so, and the 3rd pin of the comparator chip LM393 is the 2.5V that resistance R4 and resistance R11 partial pressures go out, institute Drawn high in high level state by 2.8V linear voltages source with the 1st pin of the now comparator chip LM393；When GSM moulds When 3rd pin of block GU900Q detects distress call detection circuit 19 and is output as high level, it is judged as detecting Distress call, so as to perform corresponding call function.

As shown in fig. 7, in the present embodiment, the intercommunication button 38 is button K1, one end of the button K1 and gsm module 44th pin of GU900Q connects, and is connected with the 15th pin of gsm module GU900Q by resistance R69, the button K1's The other end is grounded；One end of i.e. described button K1 is carried by the 15th pin that pull-up resistor R69 is connected to the gsm module GU900Q The 2.8V linear voltages source of confession, when intercommunication button 38 is pressed, the 44th pin of gsm module GU900Q detects high level, from And perform corresponding intercommunication function.

As shown in figure 14, in the present embodiment, the talkback handle Interface Terminal 5 is four-wire interface terminal J10, four line 1st pin of Interface Terminal J10 connects with the positive pole of the internal loudspeaker of talkback handle 3, and the 2nd of the four-wire interface terminal J10 the Pin connects with the negative pole of the internal loudspeaker of talkback handle 3, in the 3rd pin and talkback handle 3 of the four-wire interface terminal J10 The negative pole of portion's microphone connects and is grounded, the 4th pin and the internal microphone of talkback handle 3 of the four-wire interface terminal J10 Positive pole connects；

As shown in figure 15, in the present embodiment, the handle on-hook detection button 37 is double single-pole double-throw switch (SPDT) SW1, described The normal-closed end that 1st pin of double single-pole double-throw switch (SPDT) SW1, the 2nd pin and the 3rd pin are respectively one single-pole double-throw switch (SPDT) draws Pin, normally opened end pin and common port pin, described pair of the 4th pin of single-pole double-throw switch (SPDT) SW1, the 5th pin and the 6th pin difference It is the normal-closed end pin of its another single-pole double-throw switch (SPDT), normally opened end pin and common port pin；The handle on-hook detection is pressed Button circuit 42 also includes polar capacitor C10, described pair of the 1st pin of single-pole double-throw switch (SPDT) SW1 and extension set voltage supply control electricity + 12V the voltage output ends on road 16 connect, and described pair of the 3rd pin of single-pole double-throw switch (SPDT) SW1 passes through resistance R6 and polar capacitor The positive pole of C10 connects, the negative pole ground connection of the polar capacitor C10, and described pair of the 5th pin of single-pole double-throw switch (SPDT) SW1 is by electricity Resistance R85 connects with the 15th pin of gsm module GU900Q, and by the 48th pin phase of resistance R117 and gsm module GU900Q Connect, described pair of the 6th pin ground connection of single-pole double-throw switch (SPDT) SW1；I.e. described pair the 5th pin of single-pole double-throw switch (SPDT) SW1 is by electricity Resistance pull-up R85 is connected to the 2.8V linear voltages source that the 15th pin of the gsm module GU900Q is provided.When the off-hook of talkback handle 3 When, handle on-hook detection button 37 is not pressed, and circuit is connected, when 3 on-hook of talkback handle, the quilt of handle on-hook detection button 37 Press, circuit disconnects.

As shown in figure 14, in the present embodiment, the talkback handle speaking circuit 4 includes transformer T5 and chip LM386, institute The 2nd pin for stating chip LM386 is connected by nonpolar electric capacity C101 with the 4th pin of the four-wire interface terminal J10, and logical Cross nonpolar electric capacity C100 ground connection, the connection end of the nonpolar electric capacity C101 and the 4th pin of the four-wire interface terminal J10 Connected with the positive pole of polar capacitor C10 by resistance R114, and be grounded by nonpolar electric capacity C102, the chip LM386's 3rd pin and the 4th pin are grounded, the 6th pin of the chip LM386 and described pair of the 3rd pin of single-pole double-throw switch (SPDT) SW1 Connect, and be grounded by polar capacitor C106, the 7th pin of the chip LM386 is grounded by nonpolar electric capacity C80, described The resistance R115 and nonpolar electric capacity C78 for connecting, the chip are connected between 1st pin and the 8th pin of chip LM386 5th pin of LM386 is taken out by the polar capacitor C105 for connecting and the centre of the primary coil of resistance R74 and the transformer T5 Head connects, and the connection end of the polar capacitor C105 and resistance R74 is grounded by nonpolar electric capacity C79；The transformer T5's One end of primary coil connects with the 1st pin of the four-wire interface terminal J1, the primary coil of the transformer T5 it is another End is grounded by the resistance R116 and polar capacitor C92 for connecting；One end of the secondary coil of the transformer T5 passes through resistance R13 The 2nd pin with four-wire interface terminal J10 connects, the other end and the four-wire interface terminal of the secondary coil of the transformer T5 1st pin of J10 connects.On the one hand the effect of talkback handle speaking circuit 4 is the voice for gathering the internal microphone of talkback handle 3 Signal is amplified, and is on the other hand to put emergency communication main frame by chip LM386 by the voice that gsm module 18 is received Being transmitted to the internal loudspeaker of talkback handle 3 after big carries out sounding；Voltage at 3rd pin of double single-pole double-throw switch (SPDT) SW1 is by electricity It is supplied to the internal microphone of talkback handle 3 to set up suitable quiescent operation after the capacitance-resistance filter for hindering R6 and polar capacitor C10 to bias Voltage.When someone has plucked talkback handle 3 to talk, sound wave is switched to electric signal by nonpolar by the internal microphone of talkback handle 3 Electric capacity C101 is coupled to chip LM386, and chip LM386 is exported after being amplified to audio signal by the 5th pin, gives transformation The centre tap (the 3rd pin of transformer T5 in Figure 14) of the primary coil of device T5, one end (figure of the primary coil of transformer T5 5th pin of transformer T5 in 14) audio signal is just had, it has been transmitted to immediately on extension set holding wire；And now transformer The shunting of centre tap (the 3rd pin of transformer T5 in Figure 14) at left and right two ends of the primary coil of T5 is equal in magnitude, phase Conversely, so sense of the secondary coil (coil in Figure 14 between the 6th pin 1 and the 10th pin of transformer T5) of transformer T5 Induced current is 0, so that signal will not be produced, so the sound of the internal microphone of talkback handle 3 input would not be in talkback handle 3 Sent in internal loudspeaker.Meanwhile, the audio sound on extension set holding wire is from one end of the primary coil of transformer T5 (in Figure 14 5th pin of transformer T5) flow into, from the other end (the 1st pin of transformer T5 in Figure 14) of the primary coil of transformer T5 Outflow, ground, the secondary of such transformer T5 are flowed into by the capacitance-resistance balance network being made up of resistance R116 and polar capacitor C92 Coil (coil in Figure 14 between the 6th pin 1 and the 10th pin of transformer T5) just has electric current, while in the secondary of transformer T5 Level coil (coil in Figure 14 between the 6th pin 1 and the 10th pin of transformer T5) will induce voltage, the electricity for inducing Pressure is the audio voltage signal on extension set holding wire, then is linked into the internal loudspeaker of talkback handle 3 the inside.

As shown in figure 16, in the present embodiment, the anti-side-tone circuit 41 includes transformer T2, the secondary of the transformer T2 One end of coil connects with the 1st pin of the four-wire interface terminal J1, and nonpolar electric capacity C32, electricity by being sequentially connected in series Resistance R47, resistance R56 and resistance R61 connect with one end of the primary coil of the transformer T2, the primary line of the transformer T2 One end of circle is also connected by resistance R60 with one end of resistance R59 and one end of nonpolar electric capacity C53 after parallel connection, after parallel connection Resistance R59 and nonpolar electric capacity C53 other end ground connection, the other end of the secondary coil of the transformer T2 and extension set voltage + 12V the voltage output ends of supply control circuit 16 connect, and are grounded by polar capacitor C34, the primary line of the transformer T2 The centre tap ground connection of circle, the other end of the primary coil of the transformer T2 is the speech signal input of anti-side-tone circuit 41 The connection end of YI_IN, the resistance R47 and resistance R56 is the voice signal output end YI_OUT of anti-side-tone circuit 41.It is described to disappear Side-tone circuit 41 is to build transformer balance bridge network by transformer T2 to carry out elimination of the phase, so that sidetone is eliminated, by this The sidetone effect that kind circuit is carried out obtained by acoustic processing is good.

As shown in figure 17, in the present embodiment, the output voice isolation filter circuit 26 includes transformer T1, the transformation One end of the primary coil of device T1 is connected by inductance L7 with the 22nd pin of gsm module GU900Q, and by non-pole in parallel Property electric capacity C16 and nonpolar electric capacity C17 ground connection；The other end of the primary coil of the transformer T1 is by inductance L8 and GSM moulds 21st pin of block GU900Q connects, and is grounded by nonpolar electric capacity C29 and nonpolar electric capacity C31 in parallel；The transformation The nonpolar electric capacity C22 and nonpolar electric capacity C23 of parallel connection are connected between the two ends of the primary coil of device T1, the transformer T1's One end of secondary coil is the output end for exporting voice isolation filter circuit 26, the other end of the secondary coil of the transformer T1 Ground connection；By setting the output voice isolation filter circuit 26, noise jamming can be effectively prevented.

As shown in figure 17, in the present embodiment, the output audio resistance-capacitance coupling filter circuit 27 includes resistance R37, non-pole Property electric capacity C19 and nonpolar electric capacity C21, one end of one end of the resistance R37 and nonpolar electric capacity C21 with output voice every Output end from filter circuit 26 connects, and one end of the nonpolar electric capacity C19 connects with the other end of resistance R37, described non- The other end of polar capacitor C19 is the output end for exporting audio resistance-capacitance coupling filter circuit 27, and is grounded by resistance R38；

As shown in figure 17, in the present embodiment, the output audio amplifier circuit 28 includes chip TDA2003 and polar capacitor 1st pin of C20, the chip TDA2003 is defeated with output audio resistance-capacitance coupling filter circuit 27 by nonpolar electric capacity C18 Go out end to connect, the 2nd pin of the chip TDA2003 is grounded by the nonpolar electric capacity C33 and resistance R43 that connect, the core 5th pin of piece TDA2003 connects with+12V the voltage output ends of extension set voltage supply control circuit 16, and by nonpolar electricity Hold C25 ground connection, the 3rd pin and the 6th pin of the chip TDA2003 be grounded, the 4th pin of the chip TDA2003 with The positive pole of polar capacitor C20 connects, and is connected with the connection end of nonpolar electric capacity C33 and resistance R43 by resistance R39, described The negative pole of polar capacitor C20 connects with the speech signal input YI_IN of anti-side-tone circuit 41, and the nonpolar electricity by connecting Hold C24 and resistance R41 ground connection.Because output voice modulate circuit is that the loudspeaker for directly driving each emergency communication extension set are spoken, Therefore the voltage amplification factor of the output voice modulate circuit requirement carries out output audio than larger using chip TDA2003 Amplify, can well meet use demand.

The input voice modulate circuit refers to the transmitting voice signal of each emergency communication extension set to emergency communication main frame The voice modulate circuit of process, because voice signal have passed through and once amplify in each emergency communication extension set, so reach should The multiplication factor requirement of amplifying circuit is than relatively low after anxious communication host.

As shown in figure 18, in the present embodiment, the input voice resistance-capacitance coupling filter circuit 29 includes resistance R55, non-pole Property electric capacity C39 and nonpolar electric capacity C43, one end of the nonpolar electric capacity C39 exports with the voice signal of anti-side-tone circuit 41 End YI_OUT connects, and the other end of the nonpolar electric capacity C39 is grounded by the resistance R55 for connecting and nonpolar electric capacity C43；It is defeated Enter voice and circuit is coupled into by nonpolar electric capacity C39, then filtered by the RC being made up of resistance R55 and nonpolar electric capacity C43 Circuit is exported after being filtered；

As shown in figure 18, in the present embodiment, the input voice filtering and amplifying circuit 30 includes operational amplifier chip 8th pin of operational amplifier U5A, the operational amplifier chip LM358 in LM358 passes through resistance R44 and linear voltage stabilization + 5V the voltage output ends of circuit 15 connect, and are grounded by nonpolar electric capacity C37, and the of the operational amplifier chip LM358 4 pins are grounded；The in-phase input end of the operational amplifier U5A is defeated with the+5V voltages of linear voltage-stabilizing circuit 15 by resistance R48 Go out end to connect, and be grounded by resistance R51；The inverting input of the operational amplifier U5A is by resistance R52 and resistance R55 Connection end with nonpolar electric capacity C43 connects, and is grounded by nonpolar electric capacity C44；The output end of the operational amplifier U5A The inverting input of resistance R62, the operational amplifier U5A is connected between inverting input by the nonpolar electric capacity of series connection C51 and resistance R63 is grounded, and the output end of the operational amplifier U5A passes through nonpolar electric capacity C52 with the connection end of resistance R62 Connection end with nonpolar electric capacity C51 and resistance R63 connects, the output end of the operational amplifier U5A also with it is in parallel after electricity The one end for hindering R53 and nonpolar electric capacity C42 connects, and the other end of resistance R53 and nonpolar electric capacity C42 after parallel connection is input language The output end of sound filtering and amplifying circuit 30；Voice signal after the input voice resistance-capacitance coupling filter circuit 29 is processed leads to The operational amplifier U5A that resistance R52 is input in operational amplifier chip LM358 is crossed, resistance R62 is feedback resistance, resistance R48 It is used to carry out 1/2nd partial pressures to the+5V voltages that linear voltage-stabilizing circuit 15 is exported with resistance R51, so as to set up suitable same phase Amplify bias voltage；During specific implementation, the resistance of power taking resistance R52 is 5.1K, and the resistance of resistance R62 is 10K, therefore the input The voltage amplification factor of voice filtering and amplifying circuit 30 is 2 times, the multiplication factor of the input voice filtering and amplifying circuit 30 compared with It is small, the noise come in by sound signal band also very little, each electronic component in the input voice filtering and amplifying circuit 30 An active low-pass filter is also constituted on the basis of amplification, the voice signal to being input into enters Row noise filtering.

As shown in figure 18, in the present embodiment, the input voice output buffer circuit 31 includes operational amplifier chip The in-phase input end of operational amplifier U5B, the operational amplifier U5B in LM358 is amplified by resistance R54 with input voice The output end of filter circuit 30 connects, and the output end of the operational amplifier U5B is the defeated of input voice output buffer circuit 31 Go out end, and connect with the inverting input of operational amplifier U5B, and by nonpolar electric capacity C41 with it is in parallel after nonpolar electricity The one end for holding C45 and resistance R57 connects；The other end ground connection of nonpolar electric capacity C45 and resistance R57 after parallel connection；The computing Amplifier U5B constitutes voltage follower, can realize the undistorted transmission of input speech signal, reduces the output resistance of signal It is anti-；

As shown in figure 18, in the present embodiment, the input voice isolation filter circuit 32 includes transformer T3, the transformation One end of the primary coil of device T3 connects with the output end of input voice output buffer circuit 31, the primary line of the transformer T3 The other end ground connection of circle, one end of the secondary coil of the transformer T3 connects with the 19th pin of gsm module GU900Q, and logical Cross nonpolar electric capacity C40 and nonpolar electric capacity the C38 ground connection of parallel connection；The other end and GSM of the secondary coil of the transformer T3 20th pin of module GU900Q connects；And be grounded by nonpolar electric capacity C48 and nonpolar electric capacity C49 in parallel, the change The nonpolar electric capacity C46 and nonpolar electric capacity C47 of parallel connection are connected between the two ends of the secondary coil of depressor T3.During specific implementation, The transformer T3 is 1:1 audio-frequency transformer, by being input into voice filtering and amplifying circuit 30 and input voice output buffering electricity Input voice after road 31 is processed is isolated by transformer T3, and nonpolar electric capacity C40, nonpolar electric capacity are then passed through again C38, nonpolar electric capacity C48, nonpolar electric capacity C49, nonpolar electric capacity C46 and nonpolar electric capacity C47 are filtered, and filter GSM Module GU900Q harass noise after be input in the middle of gsm module GU900Q, audio noise can be entered one by capacitor filtering Step is eliminated, so that the sound for reaching gsm module GU900Q is very pure.

When the present invention is used, can be engaged with emergency communication extension set of the prior art, external mobile telephone (mobile phone) Composition emergency communication system, emergency communication extension set is wired intercom side, and external mobile telephone (mobile phone) is wireless talkback side, described Emergency communication main frame completes the intercommunication function with emergency communication extension set by the extension set holding wire being connected with emergency communication extension set, connects Enter any one party in wired system with remaining by extension set holding wire access side call (voice signal biography in wired system Defeated, not launched by GSM network carries out outgoing call), it is achieved that internal intercommunication call function；It is any in wired system when accessing When one side initiates calling by GSM network to the wireless talkback side outside wired system, outside intercommunication call is achieved that.Wirelessly Intercommunication side is not limited by region, occasion, can be arranged in mine, tunnel, factory building, in skyscraper, hoistway, confined space It is interior etc., as long as in the case where there is good GSM signals to cover, external call can be all carried out, with very big convenience.

The above, is only presently preferred embodiments of the present invention, and not the present invention is imposed any restrictions, every according to the present invention Any simple modification, change and equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention In the protection domain of art scheme.

Claims (7)

1. a kind of emergency communication main frame for having both inside and outside call function, it is characterised in that：Including host shell (1) and setting Handle groove (2) and intercommunication button (38) at the top of host shell (1), talkback handle (3) is hung with the handle groove (2), The host shell (1) is internally provided with power circuit, main frame inside and outside speaking circuit and talkback handle speaking circuit (4), institute The talkback handle Interface Terminal (5) being provided with talkback handle speaking circuit (4) for connecting talkback handle (3) is stated, it is described right Say that handle interface terminal (5) is exposed at the side of host shell (1)；

The power circuit includes rechargeable battery (6) and for 220V alternating currents to be converted into the isolated single-ended of+4.9V voltages Reverse exciting switching voltage regulator reduction voltage circuit (7), and for select 220V AC-powereds or rechargeable battery (6) power and export+ The power supply switch circuit (8) of 4.2V voltages, the isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit (7) and rechargeable battery (6) Connect with power supply switch circuit (8), the output of the isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit (7) is terminated with and fills The battery charger (9) that battery (6) connects, be connected on the battery for rechargeable battery (6) is carried out additives for overcharge protection, The battery protecting circuit (10) of over, overcurrent protection, short-circuit protection and high temperature protection, the rechargeable battery (6) it is defeated Go out to be terminated with battery voltage detection circuit (11), the output of the power supply switch circuit (8) is terminated with power indicating circuit (12) With for by the non-isolated Boost circuit (13) that+4.2V voltage conversions are+12V voltages, the power indicating circuit (12) including being exposed at the power supply indicator (14) of host shell (1) side, the non-isolated Boost circuit (13) Output point two-way, is connected to for by the linear voltage-stabilizing circuit (15) that+12V voltage conversions are+5V voltages, another road to be connected to use all the way In extension set voltage supply control circuit (16) of+12V voltage outputs to emergency communication extension set is controlled, the extension set voltage supply is controlled Circuit (16) processed is including being exposed at the call signal indicator lamp (17) of host shell (1) side；

Main frame inside and outside speaking circuit includes gsm module (18) and the SIM card holder connected with the gsm module (18) (44), GSM antenna (20), watchdog circuit (21), reset circuit (22) and speed signal processing circuit, the cell voltage inspection The output end of slowdown monitoring circuit (11) connects with the input of gsm module (18), and the input of the gsm module (18) is further connected with calling for help Signal deteching circuit (19) and handle on-hook detection button circuit (42), the handle on-hook detection button circuit (42) is including outer It is exposed at handle on-hook detection button (37) on handle groove (2), the handle on-hook detection button circuit (42) and talkback handle Speaking circuit (4) is connected, the battery charger (9) and extension set voltage supply control circuit (16) with gsm module (18) Output end connect, the output end of the gsm module (18) is further connected with buzzer circuit (39), the low indicating circuit of battery electric quantity (40) and GSM network signal indicating circuit (23), the low indicating circuit of battery electric quantity (40) is including being exposed at host shell (1) The low indicator lamp of the battery electric quantity (24) of side, the GSM network signal indicating circuit (23) is including being exposed at host shell (1) side The GSM network signal lamp (25) in face, the speed signal processing circuit includes that output voice modulate circuit, input voice are adjusted Reason circuit and anti-side-tone circuit (41), the output voice modulate circuit include the output voice isolation filter circuit for connecting successively (26), output audio resistance-capacitance coupling filter circuit (27) and output audio amplifier circuit (28), the output voice isolation filter Circuit (26) connects with the output end of gsm module (18), output end and the anti-sidetone electricity of output audio amplifier circuit (28) Road (41) connects, input voice resistance-capacitance coupling filter circuit (29) that the input voice modulate circuit includes connecting successively, defeated Enter voice filtering and amplifying circuit (30), input voice output buffer circuit (31) and input voice isolation filter circuit (32), institute The input for stating input voice resistance-capacitance coupling filter circuit (29) connects with anti-side-tone circuit (41), the input voice isolation filter The output end of wave circuit (32) connects with the input of gsm module (18)；Host shell (1) bottom is provided with hanging rail (43), for connecting the extension set Interface Terminal (33) of emergency communication extension set, the power supply terminal for connecting 220V alternating currents (34), for connecting the antenna pedestal (35) and the battery cover (36) for dismounting cell of GSM antenna (20), the extension set interface end Be provided with sub (33) be connected for the signal output part with emergency communication extension set extension set signal wire interface, for leading to emergent + 12V the power supplys of the extension set ground connection line interface of the earth terminal connection of letter extension set, the positive source for connecting outside+12V electrical appliances Anode interface and the+12V power cathode interfaces for connecting the power cathode of outside+12V electrical appliances, the distress call detection Circuit (19), anti-side-tone circuit (41) and talkback handle speaking circuit (4) are connected with extension set signal wire interface ,+12V the electricity Source anode interface is connected with extension set voltage supply control circuit (16), the isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit (7) it is connected with power supply terminal (34)；

The gsm module (18) is gsm module GU900Q, and the 1st pin of the gsm module GU900Q is grounded by resistance R75, 7th pin of the gsm module GU900Q is connected by resistance R66 with the 15th pin of gsm module GU900Q, the GSM moulds 15th pin of block GU900Q is grounded by nonpolar electric capacity C62 and nonpolar electric capacity C63 in parallel, the gsm module 34th pin of GU900Q is connected by resistance R79 with the 15th pin of gsm module GU900Q, the gsm module GU900Q's 35th pin is grounded by resistance R78, and the 26th pin of the gsm module GU900Q is grounded by nonpolar electric capacity C61, described + 4.2V voltage output end of 55th~57 pin of gsm module GU900Q with power supply switch circuit (8) connects, and by simultaneously The nonpolar electric capacity C58 of connection, nonpolar electric capacity C59, polar capacitor C60 and resistance R58 ground connection；

The extension set Interface Terminal (33) is four-wire interface terminal J1, and the 1st pin of the four-wire interface terminal J1 is extension set letter 2nd pin of number line interface CH, the four-wire interface terminal J1 is grounded line interface GND, the four-wire interface terminal J1 for extension set The 3rd pin for+12V power cathodes interface-, the 4th pin of the four-wire interface terminal J1 for+12V positive sources interface+, The commutation diode D30 that negative electrode connects with it, the commutation diode are connected on 4th pin of the four-wire interface terminal J1 The anode of D30 connects with+12V the voltage output ends of extension set voltage supply control circuit (16)；

The distress call detects that circuit (19) includes comparator chip LM393, diode D5, the comparator chip LM393 The 2nd pin connect with the positive pole of diode D5, and by parallel resistance R3 and nonpolar electric capacity C1 and linear voltage-stabilizing circuit (15)+5V voltage output ends connect, and the negative electrode of the diode D5 passes through the resistance R1 and inductance L1 and four line that connect 1st pin of Interface Terminal J1 connects, and the 3rd pin of the comparator chip LM393 passes through resistance R4 and linear voltage-stabilizing circuit (15)+5V voltage output ends connect, and are grounded by resistance R11, the 8th pin of the comparator chip LM393 with it is linear + 5V the voltage output ends of mu balanced circuit (15) connect, the 4th pin ground connection of the comparator chip LM393, the comparator core 1st pin of piece LM393 connects with the 3rd pin of gsm module GU900Q, and pass through resistance R5 and gsm module GU900Q the 15 pins connect；

The anti-side-tone circuit (41) includes transformer T2, one end of the secondary coil of the transformer T2 and the four-wire interface 1st pin of terminal J1 connects, and by the nonpolar electric capacity C32, resistance R47, resistance R56 and the resistance R61 that are sequentially connected in series with One end of the primary coil of the transformer T2 connects, one end of the primary coil of the transformer T2 also by resistance R60 with One end of one end of resistance R59 after parallel connection and nonpolar electric capacity C53 connect, resistance R59 and nonpolar electric capacity C53 after parallel connection Other end ground connection ,+12V the electricity of the other end of the secondary coil of the transformer T2 and extension set voltage supply control circuit (16) Pressure output end connects, and is grounded by polar capacitor C34, the centre tap ground connection of the primary coil of the transformer T2, described The other end of the primary coil of transformer T2 for anti-side-tone circuit (41) speech signal input YI_IN, the resistance R47 and The connection end of resistance R56 is the voice signal output end YI_OUT of anti-side-tone circuit (41).

2. according to a kind of emergency communication main frame for having both inside and outside call function described in claim 1, it is characterised in that：It is described Power supply terminal (34) is two line interface terminal J9, and the isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit (7) is including core Piece VIPER22AS-E, light-coupled isolation chip JC817, three-terminal voltage-stabilizing chip CYT431A, rectifier DZ, with a primary coil With two the transformer T4 of secondary coil, fast recovery diode D24, commutation diode D29, polar capacitor C66 and Schottky Diode D25, one end of the primary coil of the transformer T4 and the cathode voltage output end of rectifier DZ and polar capacitor C66 Positive pole connect, and connected with the negative electrode of fast recovery diode D24 by parallel resistance R84 and nonpolar electric capacity C67, institute An ac input end for stating rectifier DZ connects with the 1st pin of two line interface terminal J9, the rectifier DZ another Ac input end is connected by fuse F1 with the 2nd pin of two line interface terminal J9, and the cathode voltage of the rectifier DZ is defeated The negative pole for going out end and polar capacitor C66 is grounded；5th pin of the chip VIPER22AS-E, the 6th pin, the 7th pin and The other end of 8th pin with the primary coil of the anode and transformer T4 of fast recovery diode D24 connects, the chip 1st pin of VIPER22AS-E and the 2nd pin are grounded, and the 3rd pin of the chip VIPER22AS-E is with chip JC817's 3rd pin connects, and is grounded by nonpolar electric capacity C76, the 4th pin of the chip VIPER22AS-E by resistance R92 with The negative electrode of commutation diode D29 connects, and is connected with the 4th pin of chip JC817 by resistance R93, and by nonpolar electricity Hold C77 ground connection, the anode of the commutation diode D29 connects with one end of a secondary coil of the transformer T4, described The other end ground connection of one secondary coil of transformer T4；1st pin of the chip JC817 passes through resistance R91 and Schottky The negative electrode of diode D25 connects, and the 2nd pin by resistance R94 and chip JC817 and three-terminal voltage-stabilizing chip CYT431A Negative terminals connect, the positive terminal ground connection of the three-terminal voltage-stabilizing chip CYT431A, the three-terminal voltage-stabilizing chip The Voltage Reference end of CYT431A is connected by resistance R95 with the negative electrode of Schottky diode D25, and is grounded by resistance R97, The anode of the Schottky diode D25 connects with one end of another secondary coil of transformer T4, and the electricity by connecting Resistance R87 and nonpolar electric capacity C68 connects with the negative electrode of Schottky diode D25, another secondary coil of the transformer T4 Other end ground connection, the negative electrode of the Schottky diode D25 for isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit (7)+ 4.9V voltage output ends, and be grounded by polar capacitor C70；

The power supply switch circuit (8) includes PMOS Q14, commutation diode D26 and fast recovery diode D35, the PMOS The grid of pipe Q14 and the anode of commutation diode D26 with the+4.9V of isolated single-ended reverse exciting switching voltage regulator reduction voltage circuit (7) Voltage output end connects, the drain electrode of the PMOS Q14 and the anode of fast recovery diode D35 with rechargeable battery (6) just Pole connects, and the negative electrode of the source electrode of the PMOS Q14 and the negative electrode of fast recovery diode D35 with commutation diode D26 connects And be the+4.2V voltage output ends of power supply switch circuit (8)；

The power supply indicator (14) is light emitting diode D2, and the power indicating circuit (12) also includes resistance R9, the hair The anode of optical diode D2 is connected by resistance R9 with the+4.2V voltage output ends of power supply switch circuit (8), the light-emitting diodes The minus earth of pipe D2；

The non-isolated Boost circuit (13) includes switching power source chip MC34063A, Schottky diode D34 and pole Property electric capacity C87, the 8th pin of the switching power source chip MC34063A is by the resistance R103 and resistance R104 and power supply that connect + 4.2V the voltage output ends of switching circuit (8) connect, and the 6th pin and the power supply of the switching power source chip MC34063A switch + 4.2V the voltage output ends of circuit (8) connect, the 7th pin and resistance R103 and the electricity of the switching power source chip MC34063A The connection end for hindering R104 connects, and by the 1st pin and Schottky diode of inductance L10 and switching power source chip MC34063A The anode of D34 connects, and the negative electrode of the Schottky diode D34 is the+12V voltages of non-isolated Boost circuit (13) Output end and connect with the positive pole of polar capacitor C87, the negative pole ground connection of the polar capacitor C87, the switching power source chip 5th pin of MC34063A is grounded by resistance R108, and is connected with the negative electrode of Schottky diode D34 by resistance R107, 3rd pin of the switching power source chip MC34063A is grounded by nonpolar electric capacity C81；

The linear voltage-stabilizing circuit (15) includes voltage stabilizing chip LM7805, the 1st pin of the voltage stabilizing chip LM7805 with it is non-every + 12V voltage output ends from formula Boost circuit (13) connect, and are grounded by nonpolar electric capacity C83；The voltage stabilizing core The 2nd pin ground connection of piece LM7805, the 3rd pin of the voltage stabilizing chip LM7805 is the+5V voltages of linear voltage-stabilizing circuit (15) Output end, and be grounded by nonpolar electric capacity C86；

The call signal indicator lamp (17) is light emitting diode D1, and the extension set voltage supply control circuit (16) also includes three The base stage of pole pipe Q1, triode Q17 and triode Q28, the triode Q1 is by the 7th of resistance R10 and gsm module GU900Q Pin connects, and is grounded by nonpolar electric capacity C3, the grounded emitter of the triode Q1, the colelctor electrode of the triode Q1 Connected with the base stage of triode Q17 and the colelctor electrode of triode Q28 by resistance R68, and by resistance R8 and light emitting diode The negative electrode of D1 connects；The emitter stage of the triode Q17 and the base stage of triode Q28 by resistance R325 with it is non-isolated + 12V the voltage output ends of Boost circuit (13) connect, the light emitting diode D1 and non-isolated Boost circuit (13)+12V voltage output ends connect, the current collection extremely extension set voltage supply control circuit (16) of the triode Q17+ 12V voltage output ends.

3. according to a kind of emergency communication main frame for having both inside and outside call function described in claim 1, it is characterised in that：It is described Rechargeable battery (6) is lithium battery BT1, and the battery voltage detection circuit (11) includes resistance R99 and resistance R100, the resistance One end of R99 and one end of resistance R100 connect with the 25th pin of gsm module GU900Q, the other end of the resistance R99 Positive pole with lithium battery BT1 connects, the other end ground connection of the resistance R100；

The battery charger (9) includes triode Q15, triode Q16 and commutation diode D33, the triode Q16's Base stage is connected by resistance R102 with the 41st pin of gsm module GU900Q, the grounded emitter of the triode Q16, described The base stage of triode Q15 is connected by resistance R101 with the colelctor electrode of triode Q16, the emitter stage of the triode Q15 with every + 4.9V voltage output ends from formula single-ended reverse exciting switching voltage regulator reduction voltage circuit (7) connect, the colelctor electrode of the triode Q15 with The anode of commutation diode D33 connects, and the negative electrode of the commutation diode D33 passes through the positive pole phase of resistance R98 and lithium battery BT1 Connect；

The battery protecting circuit (10) includes Li battery protection IC DW01, NMOS tube Q15 and NMOS tube Q16, the lithium electricity Pond protects the 5th pin of chip DW01 to connect with the positive pole of lithium battery BT1 by resistance R109, and by nonpolar electric capacity C88 Negative pole with lithium battery BT1 connects, and the 6th pin of the Li battery protection IC DW01 and the source electrode of NMOS tube Q15 are and lithium The negative pole of battery BT1 connects, and the 1st pin of the Li battery protection IC DW01 connects with the grid of NMOS tube Q15, the lithium 3rd pin of battery protection chip DW01 connects with the grid of NMOS tube Q16, drain electrode and the NMOS tube Q16 of the NMOS tube Q15 Drain electrode connect, the source ground of the NMOS tube Q16, the 2nd pin of the Li battery protection IC DW01 passes through resistance R96 Ground connection；

The low indicator lamp of battery electric quantity (24) is light emitting diode D20, and the low indicating circuit of battery electric quantity (40) also includes The base stage of triode Q12, the triode Q12 is connected by resistance R71 with the 40th pin of gsm module GU900Q, and is passed through Nonpolar electric capacity C54 ground connection, the colelctor electrode of the triode Q12 is connected by resistance R64 with the negative electrode of light emitting diode D20, The anode of the light emitting diode D20 connects with+4.2V the voltage output ends of power supply switch circuit (8), the triode Q12's Grounded emitter.

4. according to a kind of emergency communication main frame for having both inside and outside call function described in claim 1, it is characterised in that：It is described GSM antenna (20) connects with the 60th pin of gsm module GU900Q, and the SIM card holder (44) is SIM card holder ID1A-6S- 2.54SF, the 1st pin of the SIM card holder ID1A-6S-2.54SF connects with the 30th pin of gsm module GU900Q, and passes through Nonpolar electric capacity C65 ground connection, the 2nd pin of the SIM card holder ID1A-6S-2.54SF passes through resistance R80 and gsm module 33rd pin of GU900Q connects, and the 3rd pin of the SIM card holder ID1A-6S-2.54SF passes through resistance R81 and gsm module 32nd pin of GU900Q connects, the 4th pin ground connection of the SIM card holder ID1A-6S-2.54SF, the SIM card holder ID1A- 6th pin of 6S-2.54SF is connected by resistance R82 with the 31st pin of gsm module GU900Q；

The watchdog circuit (21) includes chip PIC12F508, the 1st pin and gsm module of the chip PIC12F508 15th pin of GU900Q connects, the 3rd pin of the chip PIC12F508 pass through resistance R77 and gsm module GU900Q the 16 pins connect, and the 4th pin of the chip PIC12F508 is connected by resistance R76 with the 2nd pin of gsm module GU900Q, The 8th pin ground connection of the chip PIC12F508；

The reset circuit (22) is made up of reset key K2, resistance R118 and nonpolar electric capacity C89, the reset key K2's One end of one end, one end of resistance R118 and nonpolar electric capacity C89 connects with the 16th pin of gsm module GU900Q, described The other end of resistance R118 connects with the 15th pin of gsm module GU900Q, the other end of the reset key K2 and nonpolar The other end of electric capacity C89 is grounded；

The GSM network signal lamp (25) is light emitting diode D21, and the GSM network signal indicating circuit (23) is also wrapped The base stage for including triode Q13, the triode Q13 is connected by resistance R72 with the 52nd pin of gsm module GU900Q, and logical Nonpolar electric capacity C55 ground connection is crossed, the colelctor electrode of the triode Q13 passes through the negative electrode phase of resistance R65 and light emitting diode D21 Connect, the anode of the light emitting diode D21 connects with+4.2V the voltage output ends of power supply switch circuit (8), the triode The grounded emitter of Q13；

Base stage of the buzzer circuit (39) including buzzer LS2 and triode Q27, the triode Q27 passes through resistance R323 connects with the 42nd pin of gsm module GU900Q, and is grounded by resistance R324, the colelctor electrode of the triode Q27 with The negative pole of buzzer LS2 connects, the positive pole of the buzzer LS2 and the+4.2V voltage output end phases of power supply switch circuit (8) Connect, the grounded emitter of the triode Q27.

5. according to a kind of emergency communication main frame for having both inside and outside call function described in claim 1, it is characterised in that：It is described Intercommunication button (38) is button K1, and one end of the button K1 connects with the 44th pin of gsm module GU900Q, and by resistance R69 connects with the 15th pin of gsm module GU900Q, the other end ground connection of the button K1；

The talkback handle Interface Terminal (5) is four-wire interface terminal J10, the 1st pin of the four-wire interface terminal J10 with it is right Say that the positive pole of handle (3) internal loudspeaker connects, the 2nd pin of the four-wire interface terminal J10 is internal with talkback handle (3) to be raised The negative pole of sound device connects, and the 3rd pin of the four-wire interface terminal J10 connects with the negative pole of talkback handle (3) internal microphone And be grounded, the 4th pin of the four-wire interface terminal J10 connects with the positive pole of talkback handle (3) internal microphone；

The handle on-hook detection button (37) is double single-pole double-throw switch (SPDT) SW1, and described pair the 1st of single-pole double-throw switch (SPDT) SW1 the is drawn Normal-closed end pin, normally opened end pin and the common port that pin, the 2nd pin and the 3rd pin are respectively one single-pole double-throw switch (SPDT) draw Pin, described pair of the 4th pin of single-pole double-throw switch (SPDT) SW1, the 5th pin and the 6th pin are respectively its another single-pole double-throw switch (SPDT) Normal-closed end pin, normally opened end pin and common port pin；The handle on-hook detection button circuit (42) also includes polarity electricity Hold+12V the voltage outputs of C10, described pair of the 1st pin of single-pole double-throw switch (SPDT) SW1 and extension set voltage supply control circuit (16) End connects, and the 3rd pin of described couple of single-pole double-throw switch (SPDT) SW1 is connected by resistance R6 with the positive pole of polar capacitor C10, the pole Property electric capacity C10 negative pole ground connection, described pair of the 5th pin of single-pole double-throw switch (SPDT) SW1 is by resistance R85 and gsm module GU900Q The 15th pin connect, and connected with the 48th pin of gsm module GU900Q by resistance R117, described pair of single-pole double-throw switch (SPDT) The 6th pin ground connection of SW1；

The talkback handle speaking circuit (4) includes transformer T5 and chip LM386, and the 2nd pin of the chip LM386 passes through Nonpolar electric capacity C101 connects with the 4th pin of the four-wire interface terminal J10, and is grounded by nonpolar electric capacity C100, institute State nonpolar electric capacity C101 and pass through resistance R114 and polar capacitor with the connection end of the 4th pin of the four-wire interface terminal J10 The positive pole of C10 connects, and is grounded by nonpolar electric capacity C102, and the 3rd pin and the 4th pin of the chip LM386 are grounded, 6th pin of the chip LM386 connects with the 3rd pin of described couple of single-pole double-throw switch (SPDT) SW1, and by polar capacitor C106 Ground connection, the 7th pin of the chip LM386 is grounded by nonpolar electric capacity C80, the 1st pin and the 8th of the chip LM386 The resistance R115 and nonpolar electric capacity C78 of series connection are connected between pin, the 5th pin of the chip LM386 passes through the pole connected Property electric capacity C105 and resistance R74 connect with the centre tap of the primary coil of the transformer T5, the polar capacitor C105 and The connection end of resistance R74 is grounded by nonpolar electric capacity C79；One end of the primary coil of the transformer T5 connects with four line 1st pin of mouth terminal J1 connects, and the other end of the primary coil of the transformer T5 passes through resistance R116 and the polarity connected Electric capacity C92 is grounded；The 2nd pin that one end of the secondary coil of the transformer T5 passes through resistance R13 and four-wire interface terminal J10 Connect, the other end of the secondary coil of the transformer T5 connects with the 1st pin of four-wire interface terminal J10.

6. according to a kind of emergency communication main frame for having both inside and outside call function described in claim 1, it is characterised in that：It is described Output voice isolation filter circuit (26) includes transformer T1, one end of the primary coil of the transformer T1 by inductance L7 with 22nd pin of gsm module GU900Q connects, and is grounded by nonpolar electric capacity C16 and nonpolar electric capacity C17 in parallel；It is described The other end of the primary coil of transformer T1 is connected by inductance L8 with the 21st pin of gsm module GU900Q, and by parallel connection Nonpolar electric capacity C29 and nonpolar electric capacity C31 ground connection；Parallel connection is connected between the two ends of the primary coil of the transformer T1 Nonpolar electric capacity C22 and nonpolar electric capacity C23, one end of the secondary coil of the transformer T1 is output voice isolation filter electricity The output end on road (26), the other end ground connection of the secondary coil of the transformer T1；

Output audio resistance-capacitance coupling filter circuit (27) includes resistance R37, nonpolar electric capacity C19 and nonpolar electric capacity C21, One end of one end of the resistance R37 and nonpolar electric capacity C21 with output voice isolation filter circuit (26) output end phase Connect, one end of the nonpolar electric capacity C19 connects with the other end of resistance R37, the other end of the nonpolar electric capacity C19 is defeated Go out the output end of audio resistance-capacitance coupling filter circuit (27), and be grounded by resistance R38；

Output audio amplifier circuit (28) includes chip TDA2003 and polar capacitor C20, the 1st of the chip TDA2003 the Pin is connected by nonpolar electric capacity C18 with the output end of output audio resistance-capacitance coupling filter circuit (27), the chip 2nd pin of TDA2003 is grounded by the nonpolar electric capacity C33 and resistance R43 for connecting, the 5th pin of the chip TDA2003 + 12V voltage output ends with extension set voltage supply control circuit (16) connect, and are grounded by nonpolar electric capacity C25, the core 3rd pin of piece TDA2003 and the 6th pin are grounded, the 4th pin of the chip TDA2003 and the positive pole of polar capacitor C20 Connect, and connected with the connection end of nonpolar electric capacity C33 and resistance R43 by resistance R39, the negative pole of the polar capacitor C20 Speech signal input YI_IN with anti-side-tone circuit (41) connects, and nonpolar electric capacity C24 and resistance R41 by connecting Ground connection.

7. according to a kind of emergency communication main frame for having both inside and outside call function described in claim 1, it is characterised in that：It is described Input voice resistance-capacitance coupling filter circuit (29) includes resistance R55, nonpolar electric capacity C39 and nonpolar electric capacity C43, the non-pole One end of property electric capacity C39 connects with the voice signal output end YI_OUT of anti-side-tone circuit (41), the nonpolar electric capacity C39's The other end is grounded by the resistance R55 for connecting and nonpolar electric capacity C43；

Input voice filtering and amplifying circuit (30) includes the operational amplifier U5A in operational amplifier chip LM358, described 8th pin of operational amplifier chip LM358 is connected by resistance R44 with the+5V voltage output ends of linear voltage-stabilizing circuit (15), And be grounded by nonpolar electric capacity C37, the 4th pin ground connection of the operational amplifier chip LM358；The operational amplifier The in-phase input end of U5A is connected by resistance R48 with the+5V voltage output ends of linear voltage-stabilizing circuit (15), and by resistance R51 Ground connection；The connection end that the inverting input of the operational amplifier U5A passes through resistance R52 and resistance R55 and nonpolar electric capacity C43 Connect, and be grounded by nonpolar electric capacity C44；Electricity is connected between the output end and inverting input of the operational amplifier U5A The inverting input of resistance R62, the operational amplifier U5A is grounded by the nonpolar electric capacity C51 and resistance R63 for connecting, described The output end of operational amplifier U5A passes through nonpolar electric capacity C52 and nonpolar electric capacity C51 and resistance with the connection end of resistance R62 The connection end of R63 connects, the output end of the operational amplifier U5A also with it is in parallel after resistance R53 and nonpolar electric capacity C42 One end connects, and the other end of resistance R53 and nonpolar electric capacity C42 after parallel connection is the defeated of input voice filtering and amplifying circuit (30) Go out end；

Input voice output buffer circuit (31) includes the operational amplifier U5B in operational amplifier chip LM358, described The in-phase input end of operational amplifier U5B is connected by resistance R54 with the output end of input voice filtering and amplifying circuit (30), institute It is the output end of input voice output buffer circuit (31) to state the output end of operational amplifier U5B, and with operational amplifier U5B's Inverting input connects, and is connected with one end of resistance R57 with the nonpolar electric capacity C45 after parallel connection by nonpolar electric capacity C41； The other end ground connection of nonpolar electric capacity C45 and resistance R57 after parallel connection；

It is described input voice isolation filter circuit (32) including transformer T3, one end of the primary coil of the transformer T3 with it is defeated The output end for entering voice output buffer circuit (31) connects, the other end ground connection of the primary coil of the transformer T3, the change One end of the secondary coil of depressor T3 connects with the 19th pin of gsm module GU900Q, and by nonpolar electric capacity C40 in parallel It is grounded with nonpolar electric capacity C38；The other end of the secondary coil of the transformer T3 and the 20th pin phase of gsm module GU900Q Connect；And be grounded by nonpolar electric capacity C48 and nonpolar electric capacity C49 in parallel, the two ends of the secondary coil of the transformer T3 Between be connected to parallel connection nonpolar electric capacity C46 and nonpolar electric capacity C47.