CN2932883Y

CN2932883Y - A feeding interphone

Info

Publication number: CN2932883Y
Application number: CN 200620025078
Authority: CN
Inventors: 黄尚瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-27
Filing date: 2006-07-27
Publication date: 2007-08-08
Anticipated expiration: 2016-07-27

Abstract

A feed-type walkie-talkie, which belongs to telephone plant technology field, solves the problem that a walkie-talkie can be used in mine or other explosive fuel fields, is not disturbed by noise and has long transmission range. The utility model has the following technical schemes: the utility model comprises a main telephone and an extension telephone, wherein the main telephone consists of an audio power amplifier circuit, a feed circuit, a contact switch circuit, a line to line transformer B1, a loudspeaker Y1 and a microphone M; the extension telephone consists of a amplifier circuit, a line to line transformer B2 and a horn loudspeaker Y2; the main telephone is arranged in a hoist house or a dispatch room, the extension telephone is arranged on a working surface, and the main telephone is connected with the extension telephone by wire. The extension telephone uses the safety voltage fed by the main telephone as the power to solve the problem that the electronic installation can not be used without power; the contact switch circuit solves the problem that the switch is used frequently and the switch contact is not good; the main telephone and the extension telephone can realize the automatic intercommunication function by changing the relay.

Description

A kind of feed-type intercom

Technical field

The utility model relates to a kind of intercom, belongs to the telephone plant technical field.

Background technology

Intercom is the indispensable communication tools of a lot of industries, and it is bearing conversation contact among a small circle, possesses skills simply, gets in touch with characteristics such as convenience, good confidentiality.Place such as mine and cavern is owing to the particularity of its operational environment, and intercom is the communication tool that is fit to very much application.It can be easily got in touch with, dispatches and command down-hole, operation place such as aboveground, for work provides a great convenience.People find in real work, and intercom and phone commonly used at present also have certain shortcoming, as unintelligible in conversation under the strong noise of background, listen to the radio programme that commander is inconvenient at work, a plurality of working faces in down-hole instruct on the received well simultaneously etc.In addition, do not possess power supply in some inflammable and explosive places, make the use of the verbal system that electronic circuit is installed be subjected to certain restriction, produced in the terminal of communication apparatus and will use power supply and operational environment not to possess the insoluble contradiction of power supply, exerted a certain influence producing with safety.Therefore solving the problem of using intercom to carry out communication under humidities such as down-hole, cavern, inflammable and explosive environment is the vital task that the technical staff faces.

Summary of the invention

The utility model want the technical solution problem provide a kind of that can use in the inflammable and explosive place of mine and other, be not subjected to that background noise disturbs, transmission range is long, conversation clear loud and clear, can be at a plurality of working faces intercom of receiving and transmitting signals simultaneously.

The technical scheme that solves the problems of the technologies described above is:

A kind of feed-type intercom, it is made up of main frame and extension set, main frame is made up of band pass filter circuit, audio power amplifying circuit, feed circuit, touch switch circuit, line transformer B1, loud speaker Y1, microphone M, switching relay JK1, one termination line transformer B1 of band pass filter circuit, another termination audio power amplifying circuit, the output of audio power amplifying circuit is connected with line transformer B1, and touch switch circuit is connected between feed circuit and the line transformer B1; Extension set is made up of full-bridge circuit, filter circuit, amplifying circuit, line transformer B2, horn speaker Y2, switching relay JK2, full-bridge circuit, switching relay JK2 and filter circuit are connected to amplifying circuit successively, and amplifying circuit and horn speaker Y2 are connected on the secondary of line transformer B2; Main frame is placed in hoist house or the control room, and extension set is installed in working face, and the elementary of line transformer B2 of the elementary and extension set of the line transformer B1 of main frame is connected by lead.

Above-mentioned feed-type intercom, the connected mode of the line transformer B1 of described main frame and the line transformer B2 of extension set is, 0 elementary end of the contact JK3-1 of power supply by the relay J K3 of touch switch circuit and line transformer B1 is connected, elementary 0 end of line transformer B1 and high-pressure side are connected by lead with high-pressure side with elementary 0 end of line transformer B2 respectively, online 0 elementary end of transformer B1 has capacitor C 13, and online the elementary high-pressure side of transformer B2 is connected to full-bridge circuit.

Above-mentioned feed-type intercom, described touch switch circuit is made up of triode T1, T2, T3, resistance R 9, R10, capacitor C 13, relay J K3, the touch point that the base stage of triode T1 is touched switch by resistance R 9 contacts, emitter connects power supply, collector electrode connects the base stage of the multiple tube of being made up of triode T2, T3 by resistance 10, the collector electrode of triode T2, T3 connects power supply by relay J K3, the grounded emitter of T3, and capacitor C 13 is connected between the collector electrode and power supply of triode T2.

Above-mentioned feed-type intercom, the switching relay JK1 one end ground connection of described main frame, the other end connects power supply by the normally opened contact of the relay J K3 of touch switch circuit, between the input that is connected on audio power amplifying circuit normal battle and microphone M of the contact JK1-1 of switching relay JK1, normally closed point is connected between the input and band pass filter circuit of audio power amplifying circuit, between the centre tap of B1 level of the output that is connected on audio power amplifying circuit normal battle of another contact JK1-2 of switching relay JK1 and line transformer, normally closed point is connected between the output and loud speaker Y1 of audio power amplifying circuit.

Above-mentioned feed-type intercom, the normally closed point of the switching relay JK2 of described extension set is connected between the input of horn speaker Y2 and amplifying circuit, and normal the battle is connected between horn speaker Y2 and line transformer B2 secondary.

Adopt the feed-type intercom of this structure, the extension set that is placed on the scope of operation is to do power supply by the safe voltage that main frame is presented, and has solved the problem that can not use electronic installation in the power environment not possessing; The touch switch circuit of main frame has solved the problem of frequent switch, switch loose contact; Main frame and extension set can be realized the function of automatic intercommunication by switching relay; The audio frequency power amplifier integrated circuit of main frame output power is big, can connect 3 extension sets simultaneously, has solved a plurality of working faces and has accepted the problem of instructing simultaneously; Audio signal after being amplified by the extension set amplifying circuit is boosted through line transformer and is transmitted, and has solved the difficult problem that the long transmission distance pickup signal is weak, noise is big, and speech quality is greatly improved, and transmission range can reach 3000 meters.

Description of drawings

Fig. 1 is an electric theory diagram of the present utility model

Fig. 2 is host circuit figure of the present utility model

Fig. 3 is an extension set circuit diagram of the present utility model

Mark is as follows among the figure: 1, main frame 2, extension set 3, band pass filter circuit 3, audio power amplifying circuit 5, feed circuit 5, touch switch circuit 7, full-bridge circuit 8, filter circuit 9, amplifying circuit

Embodiment

Fig. 1 shows that the utility model is made up of main frame 1 and extension set 2, and main frame 1 is made up of band pass filter circuit 3, audio power amplifying circuit 4, feed circuit 5, touch switch circuit 6, line transformer B1, loud speaker Y1, microphone M, switching relay JK1.Extension set 2 is by full-bridge circuit 7, filter circuit 8, amplifying circuit 9, line transformer B2, horn speaker Y2, switching relay JK2 group.Main frame 1 is placed in hoist house or the control room, and extension set 2 is installed in working face, and the elementary of line transformer B2 of the elementary and extension set 2 of the line transformer B1 of main frame 1 is connected by lead.

Fig. 2 is host circuit figure of the present utility model.Show among the figure, one termination line transformer B1 of band pass filter circuit 3, another termination audio power amplifying circuit 4, the output of audio power amplifying circuit 4 is connected with line transformer B1, and touch switch circuit 6 is connected between feed circuit 5 and the line transformer B1.The parameter of line transformer B1 in the circuit is 10W 12V-0:0-4 Ω-8 Ω.

In main frame 1, B1 level of line transformer 4 Ω terminate at the output of audio power amplifying circuit 4, and its effect is to promote the audio voltage that main frame 1 flows to extension set 2, improves the transmission range of signal.The positive source of main frame 1 is connected to the 0 elementary end of line transformer B1 by the normally closed point of the contact JK3-1 of current-limiting resistance R11 and relay J K3, gives extension set 2 by coil from the 120V end, as the positive source of extension set 2.The 0 elementary end of online transformer B1 also is connected to capacitor C 13, and its effect is the coupling audio signal sent here of extension set 2 and stops that the positive source of 0 end passes through.

In main frame 1, switching relay JK1 one end ground connection, the other end connects power supply by the normally opened contact of the relay J K3 of touch switch circuit 6, and relay J K3 is connected in the touch switch circuit 6.Between the input end who is connected on audio power amplifying circuit 4 normal battle and microphone M of the contact JK1-1 of switching relay JK1, normally closed point is connected between the input end and band pass filter circuit 3 of audio power amplifying circuit 4, between the 4 Ω end of B1 level of the output that is connected on audio power amplifying circuit 4 normal battle of another contact JK1-2 of switching relay JK1 and line transformer, normally closed point is connected between the output and loud speaker Y1 of audio power amplifying circuit 4.

When using, when scheduling or administrative staff pin the contact point of soft-touch control, triode T1, the T2 of touch switch circuit 6, T3 conducting, relay J K3 adhesive, normal adhesive battle of contact JK3-1 makes switching relay JK1 get.Switching relay JK1 get electric after, normal adhesive battle of its JIK1-1 contact, normally closed point disconnects, make the input end of microphone M and audio power amplifying circuit 4 connect, normal adhesive battle of JK1-2 contact simultaneously, normally closed point disconnects, and the output of audio power amplifying circuit 4 is connected line transformer B1 with loud speaker Y1 disconnection 4 Ω end is connected, and sends audio signals by line transformer B1 to extension set 2.When relay J K3 adhesive, normal adhesive battle of contact JK3-1, disconnect the normally closed point of JK3-1 simultaneously, disconnect extension set 2 power supplys, discharge after the switching relay JK2 dead electricity of extension set 2, connect normal the battle, make the audio signal of main frame 1 microphone M pass to working face by horn speaker Y2, scheduling and administrative staff talk to the scope of operation by microphone.And when the contact point of unmanned contact soft-touch control, relay J K3 disconnects, the normally closed some adhesive of contact JK3-1, switching relay JK1 dead electricity.After the switching relay JK1 dead electricity, disconnect the normal battle of JIK1-1 contact, normally closed some adhesive, make the input of microphone M and audio power amplifying circuit 4 disconnect, and bandwidth filter circuit 3 is connected with the input of audio power amplifying circuit 4, disconnect the normal battle of JK1-2 contact simultaneously, normally closed some adhesive, the output of audio power amplifying circuit 4 and loud speaker Y1 connect, and disconnect with 4 Ω of line transformer B1 end, at this moment the loud speaker Y1 of main frame can play the audio signal of the extension set of coming from line transformer B1 secondary transmission.When relay J K3 disconnects, the normally closed some adhesive of contact JK3-1, connect extension set 2 power supplys, the switching relay JK2 of extension set 2 gets electric back adhesive, normally closed point has been connected being connected of input of horn speaker Y2 and amplifying circuit 9, amplify by amplifying circuit 9 after the horn speaker Y2 pickup, by the 8 Ω end of B2 level of transformer between the output wiring of amplifying circuit 9, be transferred to main frame 1 again.Master, extension set dialogue have been realized by soft-touch control like this.

In the utility model, bandwidth-limited circuit 3 is made up of resistance R 1, R2, R4, capacitor C 1, C2, C3, C4, and its bandwidth is 100Hz～8KHz, can reach the communication effect of high definition in noisy environment; Audio power amplifying circuit 4 adopts the TDA2003 chip, and its 1 pin is an input, 3 pin ground connection, and 4 pin are output, and 5 pin connect power supply, and 2 pin connect 4 pin; Filter circuit 8 is made up of voltage-stabiliser tube DW1, capacitor C 18, C19; Amplifying circuit 9 adopts the LM386 chip, and its 3 pin are the input end, 2,4 pin ground connection, and 6 pin are output, 7 pin connect power supply by filter circuit 8; Relay J K1, JK3 adopt the 24V relay switch, and relay J K2 adopts the 12V relay switch; Horn speaker 2 adopts the Horn loudspeaker of 8 Ω 5W, plays playback and pickup effect in extension set, can be moistureproof, explosion-proof effectively.

Foregoing description only proposes as several enforceable technical scheme of the utility model feed-type intercom, not as the single restrictive condition to its circuit design or structure itself.

Claims

1. feed-type intercom, it is characterized in that: it is made up of main frame  1  and extension set  2 , main frame  1  is by band pass filter circuit  3 , audio power amplifying circuit  4 , feed circuit  5 , touch switch circuit  6 , line transformer B1, loud speaker Y1, microphone M, switching relay JK1 forms, the termination line transformer B1 of band pass filter circuit  3 , another termination audio power amplifying circuit  4 , the output of audio power amplifying circuit  4  is connected with line transformer B1, and touch switch circuit  6  are connected between feed circuit  5  and the line transformer B1; Extension set  2  are made up of full-bridge circuit  7 , filter circuit  8 , amplifying circuit  9 , line transformer B2, horn speaker Y2, switching relay JK2, full-bridge circuit  7 , switching relay JK2 and filter circuit  8  are connected to amplifying circuit  9  successively, and amplifying circuit  9  and horn speaker Y2 are connected on the secondary of line transformer B2; Main frame  1  is placed in hoist house or the control room, and extension set  2  are installed in working face, and elementary the elementary of line transformer B2 with extension set  2  of the line transformer B1 of main frame  1  is connected by lead.

2. feed-type intercom according to claim 1, it is characterized in that: the connected mode of the line transformer B1 of described main frame  1  and the line transformer B2 of extension set is, the elementary O end of the contact JK3-1 of power supply by the relay J K3 of touch switch circuit  6  and line transformer B1 is connected, the elementary O of line transformer B1 end and high-pressure side are held with the elementary O of line transformer B2 respectively and are connected by lead with high-pressure side, online the elementary O end of transformer B1 has capacitor C 13, and online the elementary high-pressure side of transformer B2 is connected to full-bridge circuit  7 .

3. feed-type intercom according to claim 2, it is characterized in that: described touch switch circuit  6  are made up of triode T1, T2, T3, resistance R 9, R10, capacitor C 13, relay J K3, the touch point that the base stage of triode T1 is touched switch by resistance R 9 contacts, emitter connects power supply, collector electrode connects the base stage of the multiple tube of being made up of triode T2, T3 by resistance 10, the collector electrode of triode T2, T3 connects power supply by relay J K3, the grounded emitter of T3, capacitor C 13 are connected between the collector electrode and power supply of triode T2.

4. feed-type intercom according to claim 3, it is characterized in that: the switching relay JK1 one end ground connection of described main frame  1 , the other end connects power supply by the normally opened contact of the relay J K3 of touch switch circuit  6 , be connected on the normal battle of the contact JK1-1 of switching relay JK1 between the input and microphone M of audio power amplifying circuit  4 , normally closed point is connected between the input and band pass filter  3  circuit of audio power amplifying circuit  4 , be connected on the normal battle of another contact JK1-2 of switching relay JK1 between the centre tap of assisting out end and B1 level of line transformer of audio power amplifying circuit  4 , normally closed point is connected between the output and loud speaker Y1 of audio power amplifying circuit  4 .

5. feed-type intercom according to claim 4, it is characterized in that: the normally closed point of the switching relay JK2 of described extension set  2  is connected between the input of horn speaker Y2 and amplifying circuit  9 , and normal the battle is connected between horn speaker Y2 and line transformer B2 secondary.