CN2133996Y

CN2133996Y - Radio broadcast transceiver for tour guiding

Info

Publication number: CN2133996Y
Application number: CN92225243.2U
Authority: CN
Inventors: 曹振华; 连吉敏
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-23
Filing date: 1992-06-23
Publication date: 1993-05-19
Anticipated expiration: 2002-06-23

Abstract

The utility model belongs to a radio transmitting and receiving system, especially suitable for radio broadcasting devices used for the broadcast of guides in tours. The radio transmitting and receiving system adopts a radio frequency transmitter and also uses an automatic turn-over tape player and a microphone, and the briefing speeches can be broadcast in foreign languages and Chinese; the receiver receive sounds by using earphones, and the wire of the earphone is used as the receiving antenna. The utility model is easy to form the transmitting and receiving network and has the advantages of wide range of application, low cost, and strong practicability.

Description

Radio broadcast transceiver for tour guiding

The utility model belongs to the radio transmission system, is to be specially adapted to guide's air cast device of broadcasting.

At present, explanation work in tourist quarters and exhibition center, except that directly explaining by the guides, also has public address system, be generally wired and wireless two classes, and it is in the majority with wired broadcast, promptly based on a broadcaster, by broadcasting network by the loud speaker explanation of broadcasting, it is single that these guides and explanation mode all exist the demand and the content that are subjected to guides's quality restriction can not satisfy sightseeing person to some extent, can not the many occasions of simultaneous adaptation and the visitor of China and foreign countries to specifically explaining and publicising the deficiency of listening to of content.

The purpose of this utility model is to provide a kind of emission/reception radio broadcaster that disposes many micro-receivers, this device has at least one shared 1 small-power radio frequency sending set with super band, be distributed in the different sight spots of tourist quarters according to its transmitting power size and emission area coverage, the miniature reception sound that is equipped with effective quantity in the room at each sight spot is rented for the tourism visitor, on 1 of transmitter or two frequency ranges, carry out Chinese and foreign language explanation by the commentary that the higher guide worker of a small amount of quality maybe will be recorded on the tape respectively, the tourism visitor can listen to by the earphone of micro-type receiver, thereby satisfy tourism visitor's needs, to overcome the existing in prior technology deficiency.

Overall structure of the present utility model is:

Every transmitter is to serve as mainly to constitute with modulator (3), (4) and reflector (7), (8) that can produce at least one frequency range, oscillator (18) input A, B in modulator (3), (4) connects magnetic tape sound reproducer (1), (2) (FYT) and microphone (5), (6) by change over switch K1, and output C, the D of oscillator connects that radio frequency amplifies, radiating circuit unit (19); Each receiver based on comprise height and put (12), in put IC sheet or the discrete connection of each circuit unit that (13) and detection audio power amplify circuit units such as (14) and constitute tuning receiving circuit unit (21), the input of IC sheet connects adjusts detune circuit unit (22), be connected with change over switch K3 in the circuit unit, K3 and tuning circuit unit, constitute frequency range transducer (11), the output of IC sheet connects audio amplifier circuit unit (23), amplification circuit output end equipped with loudspeaker (15).

Its specific structural features is:

The oscillator of transmitter (18) is by variable capacitance diode VD, inductance coil L2, the base stage of crystal-vibration-chip (JT) and transistor BG2 is connected in series formation successively, microphone connects with change over switch K1 by the audio amplifier circuit unit (17) based on transistor BG1, crystal-vibration-chip JT connects formation Class C mode oscillation amplifying circuit with transistor BG3, inductance coil L3 and resistance R 13, R12 connects mutually and is its collector load, automatically the tape recorder of turn-over (FYT), microphone MIC jack, mains switch K2, potentiometer W2 in the radio frequency amplifying circuit (23) is a merit position regulator potentiometer, frequency range change over switch K1 and transmitting antenna (TX) jack installs respectively before transmitter, rear board (25), (26) on; The IC sheet of each receiver can be selected a kind of among the TDA7010,7023 for use, the inductance coil L8 of single-pole double-throw switch (SPDT) K3 and tuning circuit unit (22) also connects, the audio amplifier circuit unit serves as main formation with transistor BG5, loud speaker is the high impedance earphone, T4 connects with output transformer, single-pole double throw change over switch K3, earphone and potentiometer W3, mains switch K4 install respectively on the box body (27) at receiver, and the lead-in wire of earphone (24) is the antenna of receiver.

The output transformer of transmitter is secondary to connect transmitting power display (N) by coil L7 and detector amplifier, and device is on the front panel (25) of transmitter, transmitter and the automatic shared power supply of turn-over cassette player (20), power supply are to hand over a commutator transformer based on the routine of transformer T3 and bridge rectifier, three terminal regulator.

Accompanying drawing of the present utility model has:

Fig. 1 is the transmission/reception block diagram.

Fig. 2 is the transmitter circuitry structure chart.

Fig. 3 is the receiver circuit structure chart.

Fig. 4 is the transmitter/receiver panel layout.

Accompanying drawing has provided embodiment of the present utility model, further specifies as follows in conjunction with the accompanying drawings:

The microphone of this transmitter adopts Electret condenser microphone, with the audio amplifier circuit unit of its configuration is to serve as the main custom circuit that constitutes with transistor 9016, automatically the turn-over cassette player can adopt the automobile cassette player, it is modulated after launch from antenna TX based on amplifying circuit and output transformer T1, the T2 of BG3, BG4 to be by variable capacitance diode VD and crystal-vibration-chip that the main oscillating circuit that constitutes can produce 44MHZ or 49MHZ strength signal, potentiometer W2 is used for power adjustments, and power display is the ammeter of 100 μ A ranges.By operating personnel's cassette player of the tape that records can being packed into, stir single-pole double-throw switch (SPDT) K1 and play Chinese or foreign language explanation with magnetic tape sound reproducer respectively, or directly broadcast during work with microphone by the guide.According to the power and the topped scope of low power transmitter, in, the visitor that travels can listen to by earphone at one or more sight spots by renting micro-receiver outward.For easy to use, make reception antenna with earphone wire, be abutted against the change over switch of receiving on the cover body and listen to Chinese or foreign language broadcast.Receiver since adopt advanced TDA7010IC sheet have both height put, in put, function such as local oscillator detection, reduced body volume greatly, in receiving circuit, resistance R 3 and capacitor C1 also for preventing to be provided with because of noise that self-oscillation produces.Receiver uses dry cell E2 to make DC power supply.

In receiver power supply circuit (20), also connecting battery pack E1, make transmitter supply when control is prepared against and had a power failure by relay J.

The obtained technological progress of the utility model is:

1, this transmission/reception can be according to the distribution in tourist attractions or exhibition center by at least one small-power radio frequency sending set and many of assembly radio broadcast network systems that little receiver consists of mutually with it, and adopt Chinese or foreign language to broadcast, not only solved the demand to the high-quality Guide interpreter, and in being very easy to, outer tourism visitor's visit activity, effectively satisfied their audiovisual requirement.

2, because transmitter power is little, only take amateurish one or two frequency range, in addition, the receiving plane volume is little, cost is low, be easy to carry, so this transmitter/receiver and network system thereof has and be beneficial to the distinguishing features such as economic benefit of promoting the use of and improving tourist industry.

Claims

1, a kind of radio broadcasting tour guide device comprises at least one shared radio frequency sending set with super band (9) and the receiver of effective quantity of assembly (10) with it, it is characterized in that every transmitter is serves as main to constitute with modulator (3), (4) and reflector (7), (8) that can produce at least one frequency range, oscillator (18) input A, B in modulator (3), (4) connects magnetic tape sound reproducer (1), (2) (FYT) and microphone (5), (6) by change over switch K1, and output C, the D of oscillator connects that radio frequency amplifies, radiating circuit unit (19); Each receiver based on comprise height and put (12), in put IC sheet or the discrete connection of each circuit unit that (13) and detection audio power amplify circuit units such as (14) and constitute tuning receiving circuit unit (21), the input of IC sheet connects adjusts detune circuit unit (22), be connected with change over switch K3 in the circuit unit, K3 and tuning circuit unit, constitute frequency range transducer (11), the output of IC sheet connects audio amplifier circuit unit (23), amplification circuit output end equipped with loudspeaker (15).

2, broadcasting tour guide device according to claim 1, the oscillator (18) that it is characterized in that transmitter is by variable capacitance diode VD, inductance coil L2, the base stage of crystal-vibration-chip (JT) and transistor BG2 is connected in series formation successively, microphone connects with change over switch K1 by the audio amplifier circuit unit (17) based on transistor BG1, crystal-vibration-chip JT connects formation Class C mode oscillation amplifying circuit with transistor BG3, inductance coil L3 and resistance R 13, R12 connects mutually and is its collector load, automatically the tape recorder of turn-over (FYJ), microphone MIC jack, mains switch K2, potentiometer W2 in the radio frequency amplifying circuit (23) is the power adjustments potentiometer, frequency range change over switch K1 and transmitting antenna (TX) jack installs respectively before transmitter, rear board (25), (26) on; The IC sheet of each receiver can be selected a kind of among the TDA7010,7023 for use, and the inductance coil L8 of single-pole double-throw switch (SPDT) K3 and tuning circuit unit (22) also connects, and the audio amplifier circuit unit is with transistor BG ₅Be main to constitute, loud speaker is the high impedance earphone, and T4 connects with output transformer, and single-pole double throw change over switch K3, earphone and potentiometer W3, mains switch K4 install respectively on the box body (27) at receiver, and the lead-in wire of earphone (24) is the antenna of receiver.

3, broadcasting tour guide device according to claim 1 and 2, it is characterized in that connecting transmitting power display (N) by coil L7 and detector amplifier in that the output transformer of transmitter is secondary, and device is on the front panel (25) of transmitter, transmitter and the automatic shared power supply of turn-over cassette player (20), power supply are to hand over a commutator transformer based on the routine of transformer T3 and bridge rectifier, three terminal regulator.