CN2257422Y - Multifunctional teaching-aid testing and monitoring device - Google Patents

Abstract

The utility model relates to a multifunctional teaching-aid testing and monitoring device, which comprises a main machine and a secondary machine part. The bidirectional transmission of a signal or feedback connection is adopted between the main machine and a secondary machine. The main machine adopts single circuit small signal preamplification and multiplex great power output and has the advantages of high-fidelity, great power, and low bit noise ratio. Function keys of the main machine can realize all call, broadcast reception, group call, selection listening, voice recording and self-listening of a network system. The utility model is particularly suitable for bidirectional message transmission between classes of primary schools and middle schools. The teaching condition of a whole school or an individual class group can be monitored omnidirectionally. The cost of the whole machine is low.

Description

Multi-functional assiatant's controller

The utility model belongs to language, sound transmission equipment, is specifically related to a kind of teaching that is exclusively used in, and the voice that connect master-control room and Ge Ban classroom send equipment mutually.

At present, in China, the teaching management of primary school is also very backward, most school still adopts traditional teaching management means, teaching sealing between school, class and the interclass, information interchange difficulty.The situation of giving lessons of each class can only be faced to listen and viewed and emulated by the scene, influence communicative effect, and the school that has adopts common public address equipment only, can only be unidirectional (by the school to class) transmission information.

But the purpose of this utility model is to provide multi-functional assiatant's controller of a kind of transmitted in both directions or feedback school level master-control room and class's voice signal.

The utility model is taked following technical scheme.

Multi-functional assiatant's controller includes host machine part and extension set part, and main frame is provided with recorder circuit and recorder power, but signal transmitted in both directions between main frame and the extension set or feedback connect.

The main frame transmission signals is by main frame microphone (H _Main) talked about after, signal is through connecting input amplifier (F _Main), through function key (J ₁-J ₆) conversion input amplifier [F ₁-F _n(n is a natural number)], the signal of each amplifier amplifies the back and drives one group of 10 extension set, through the key (B of class ₁-B _10n) control the sound device speech of raising one's voice in the extension set, total extension set number can reach 10n.

The extension set feedback signal is by extension set microphone (H _Divide) connection amplifier (F _Divide) through the key (B of class ₁-B _10n), function key (J ₁-J ₆) control amplifier (F ₁--F _n), and through function key (J ₁-J ₆) select playback output A, B point and choosing listen the power amplifier level GF of signal output C, D point connection recorder circuit ₁And GF ₂Point, function key (J ₁-J ₆) E, F point connect the rear end of putting ZHF in the radio reception of recorder circuit, the level signal that A, B, C, D, E, F are ordered exports recorder loud speaker (Y to through the circuit of recorder _Record) playback.Function key J ₆H, K point meet recorder power T ₁The automatic switch effect is played in the rectification rear end.

Main frame amplifier (F ₁-F _n) adopted audio frequency amplifier integrated block TDA2030A.Independent electric power supply (T is used in each amplifier and output loading ₁-T _n).

Connect to shield worn-out line separated time between main frame and the extension set.

The utlity model has tangible result of use, this machine both can be notified from a phone call, and also can monitor and receive control, function key is provided with and generally calls, selects listens, playback, recording, function such as listens certainly.Generally call or group busy or group's (for example exhale certain several class) function can replace present public address equipment, pass on the leader's of school speech, select auditory function can select the speech and the classroom discipline situation of listening certain classroom teacher arbitrarily, improve teaching management, supervise the teacher to improve teaching level, simultaneously can be with the teaching level height, teaching has skill teacher's teaching situation to carry out on-the-spot recording, exchanges between the teacher.This machine is on probation in Shanxi Province experimental middle school, and the effect reflection is fine. and the complete machine cost is not high, and installation can be born by general middle and primary schools.

Below in conjunction with accompanying drawing the utility model is further described.

Accompanying drawing 1 is multi-functional assiatant's controller master block diagram.

Accompanying drawing 2 is the recorder circuit block diagram.

Accompanying drawing 3 is the recorder power block diagram.

Accompanying drawing 4 is surveyed the device electrical schematic diagram for multi-functional assiatant.

Among the figure, T ₁-T ₄Be power transformer, LYFYCHLB is recording radio reception disposable plates, F ₁-F ₃Be amplifier, J ₁-J ₆Be function key, QH, Fr, Q ₁H, XT, LY, ZT are function key J ₁-J ₆Be respectively generally call, playback, group busy, select listen, recording, from auditory function key, B ₁-B ₆Be class's key, ZHD ₁, ZHD ₂Be oscillator stage, HP is a mixer stage, and ZHF is put level in being, SHLZHH is for including conversion, and LF is recording playback, and SHr is radio reception, WF ₁, WF ₂Put DF for little ₁, DF ₂Put GF for low ₁, GF ₂Be power amplifier, DPZHSH is the level indication, and LFDJ is the recording playback motor, and GF is a power amplifier, and TZHG is for adjusting pipe, and SHYZH is the radio reception middle rank, H _MainBe main frame microphone, Y _RecordBe recorder loud speaker, H _DivideBe extension set microphone, Y _DivideBe the extension set loud speaker.

Main frame is equipped with recorder circuit, from the classroom extension set Electret condenser microphone H is installed _DivideThe signal of feedback amplifies F through two-stage _DivideAnd F _n, transport to function key.J ₂Be playback button, the output of E, F point is connected to the rear end of putting ZHF in the radio reception of recorder circuit, J ₁, J ₃Be respectively and generally call key and group busy key, the standard-sized sheet of control extension set or portion are separately.J ₄Listen key for choosing, its output signal meets the power amplifier level GF of recorder circuit through C, D point ₁And GF ₂, listen to by the recorder loud speaker.J ₅For selecting the playback key, its output is connected to the power amplifier level GF of recorder circuit through A, B point ₁And GF ₂, record by recorder circuit.J ₆For listening key certainly, its H, K contact meet power supply T ₁The control of rectification rear end is from listening mains switch.

Adopt the worn-out line separated time of screen to connect between main frame and the extension set.

Claims (4)

1, a kind of multi-functional assiatant's controller includes host machine part and extension set part, and main frame is provided with recorder circuit and recorder power, it is characterized in that adopting between main frame and the extension set transmitted in both directions of signal or feedback to connect:

A, main frame transmission signals are by main frame microphone (H _Main) connection amplifier (F _Main) through function key (J ₁-J ₆) conversion input amplifier [F ₁-F _n(n is a natural number)], amplifier (F ₁-F _n) a grade key (B succeeds ₁-B _10n) loud speaker (Y in the control 10n component machine _Divide);

B, extension set feedback signal are by extension set microphone (H _Divide) connection amplifier (F _Divide) through the key (B of class ₁-B _10n), function key (J ₁-J ₆) control amplifier (F ₁--F _n), and through function key (J ₁-J ₆) select playback output A, B point and choosing listen the power amplifier level GF of signal output C, D point connection recorder circuit ₁And GF ₂Point, function key (J ₁-J ₆) E, F point connect the rear end of putting ZHF in the radio reception of recorder circuit, the level signal that A, B, C, D, E, F are ordered exports recorder loud speaker (Y to through the circuit of recorder _Record) playback, function key J ₆H, K point meet recorder power T ₁The rectification rear end.

2, multi-functional assiatant's controller as claimed in claim 1 is characterized in that main frame amplifier (F ₁-F _n) adopted audio frequency amplifier integrated block TDA2030A.

3, multi-functional assiatant's controller as claimed in claim 1 is characterized in that main frame amplifier (F ₁-F _n) and each group output relative set of driving power-supply system (T independently ₁-T _n).

4,, it is characterized in that main frame connects to shield worn-out line separated time with extension set as claim 1,2 or 3 described multi-functional assiatant's controllers.

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