JPS59102B2 - group learning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a group learning device used for language training and the like, and to one that transmits and controls data via multiple signal lines.

A conventional group learning device of this type was constructed as shown in FIG.

In other words, in the figure, 1 is the teacher's control device (master section)
2 is the student side equipment (booth section). The master section 1 includes a program sending section 10 for sending an audio teaching material program to all students, and a communication section 11 for mutual communication and monitoring between a teacher and a specific student, a teacher and all or a specific group, and a specific student. , an analyzer section 12 for measuring students' learning reactions, and a control section 13 for controlling a tape recorder and the like on the booth side. A headphone 14 and a microphone 15 for the teacher are connected to the communication section 11. On the other hand, the boom section 2 includes a program selection section 20 for selecting a teaching material program, a community communication section 21 for comparing and practicing the teaching material program with one's own pronunciation and receiving instructions and guidance from the teacher, and a communication section 21 for comparing and practicing the teaching material program with one's own pronunciation, and receiving instructions and guidance from the teacher. It consists of an answer switch section 22 for making answers and a tape recorder control section 23 for controlling the tape recorder. A headphone 24 and a microphone 25 for students are connected to the communication section 21. In this configuration, the teaching material program consists of 4
The program is sent from one program device (tape recorder, record player, etc.) to the booth section 2 via the program sending section 10 of the master section 1 and four program lines 100. In booth section 2, selection switch 20
0 is selected, the voice is recorded on the tape recorder 2 through the amplifier, and the voice is received by the student at the same time. The student practices vocalization by himself while listening to the playback sound of the recorded program, and records it on the tape recorder 201. Furthermore, practice by comparing the recorded program sounds with your own vocalizations. On the other hand, the teacher operates two interlocking switches 104, 1.
05 can be connected to the monitor 106 to monitor the student's practice status, and when instruction or guidance is required, it can be connected to the intercom 107 to communicate with the student. Since the switches 104 and 105 have common terminals in common with the other switches, when connected to the intercom 107, communication can be performed between all students who are in intercom mode.
When the student wants to call the teacher, he closes the call switch 202 in the booth section 2, and the lamp 108 corresponding to the specific booth section in the master section 1 lights up. The student's learning level is measured using, for example, a five-choice method program teaching material. Each student answers using the answer switch 203. When the teacher sets the correct number on the correct answer switch 109, current flows only through the lines of students who have answered the same number, passes through the resistor 110, and causes the meter 111 to swing, and the meter 111 receives a signal proportional to the number of correct answers. The following display is given. When conducting training using simultaneous recording or program learning methods, the teacher controls the tape recorder on the student's side using the various control switches 112 on the master section 1 side to perform program recording, playback, student recording, and rewinding. , fast forward, stop, etc. mode. Then, the tape recorder control circuit 204 of the booth section 2 is activated to control the tape recorder. In such a conventional device, the lines connecting the master section 1 and one booth section 2 are four program lines, four communication lines, seven response lines, and six tape recorder lines. A total of 21 lines including the control line are required. Generally, the number of students, that is, the number of booth sections 2, is 30 to 60, so the total number of lines actually exceeds 1000 lines. Therefore, wiring work is extremely troublesome, and the number of wires in the master section is also extremely large, resulting in drawbacks such as incorrect wiring, frequent failures, crosstalk, and deterioration of S/N ratio characteristics. The present invention has been made in view of these points, and by adopting a multiple line system for coupling between the master section and the booth section, the number of lines can be greatly reduced.
In addition to improving various characteristics, this design eliminates the need to increase the number of lines even when new equipment or functions are added to the master section and booth section.

An embodiment of the present invention will be explained based on the drawings from FIG. 2 onwards.

In the block diagram of Figure 2, 3 is the teacher's control equipment (
4 indicates the student side equipment (booth section).

The master section 3 modulates the four-channel program and the audio necessary for communication between the teacher and the students using different carrier waves and sends them to the student side, and also modulates the four-channel program and the audio necessary for communication between the teacher and students and sends them to the student side. Audio transmitting/receiving unit 30 for separating signals, switching and controlling the audio line on the student side, transmitting and displaying call signals from students, transmitting and receiving signals from answering devices, storing and displaying contents, student tape recorder It consists of a control section 31 that performs input/output, calculation, storage, and conversion of transmission signals for controlling control and the like. The booth section 4 also includes an audio transmitter/receiver section 40 that selectively demodulates multiplexed transmission waves, amplifies the student's audio, sends it to the master side, and switches the transmitted and received signals, and interprets control signals sent from the master section. A booth control section 41 takes in the designated number only for its own booth section, switches audio circuits, outputs control outputs for tape recorders, etc., and encodes signals from booth switches, answer switches, etc. and sends them out in response to signals from the master side. It is made up of The transmission line connecting the master section 3 and one series, for example, 16 booth sections 4, is only one audio line 50 between the audio transmitting/receiving sections 30 and 40, which transmits and receives multiplexed audio signals. The control section 31 and the booth control section 41 also have a data sending line 51 for sending control signals from the master section to the booth section, a data receiving line 52 for backing data from the booth section to the master section, and a data receiving line 52 for sending control signals from the master section to the booth section. Three synchronization transmission lines 53 for sending synchronization signals for synchronization are bridge-wired to each bus section. The frequency bands of the audio multiplexed signals transmitted and received over the audio line 50 are, for example, in the range shown in FIG. 3.

That is, the audio sent from the master section 3 side to the booth section 4 is 5.015.2, 5.4, 5.6, and 5.8 MHz.
It is transmitted using AM waves that are amplitude-modulated with various types of carrier waves. Of these, 5.0 MHz is for sending talk signals from the teacher to students, and 5.2, 5.4, 5.6, and 5.8 MHz are for sending program signals. The monitor signal sent from the booth section 4 side to the master section 3 is 50 to 10000H.
This is the normal voice band of z. The minimum transmitted and received signal is approximately 9
Since they are an octave apart, it is easy to separate the two. FIG. 6 shows a signal arrangement corresponding to one booth section of three lines 51, 52, and 53 as data lines connecting the control sections 31 and 41.

That is, the signal on the data sending line 51 is a serial code signal, as shown in a, where the first bit is 1 bit indicating the start of data, and the second is 4 bits indicating the address of the booth section 4 (that is, a maximum of 16 addresses). ), the third is the audio mode of booth section 4, 4 bits (16 modes),
Fourthly, there are 4 bits (16 modes) for determining the mode of the tape recorder in the booth section 4, and the subsequent 11 bits are blank, thus completing the allocation of data for 4 portions of one booth section. From then on, the start bit for the next booth section 4 is sent. As shown in b, the signal on the data receiving line 52 is 3 bits after the end of the fourth 4 bits on the data sending line 51, 1 bit indicating the start of data, and 2nd bit indicating a call, attendance, etc. 3
There are 3 bits (8 modes) and 3 bits that indicate the answer number. The signal of the synchronous sending line 53 is transmitted to the Yu1 leg 31.
, 41 is a pulse signal for synchronizing transmission and reception between the two. To explain the audio transmitting/receiving section 30 in the master section 3 in more detail with reference to FIG.
... and is adjusted to the specified level by the amplifier 304. On the other hand, in the oscillators 306 corresponding to the respective channels, 5.2, 5.4, 5.
6, oscillates a 5.8 MHz signal, and transmits the amplitude modulator 312.
..., the carrier wave is the amplifier 304...
・The output signal is modulated by the next bandpass filter 3.
16... removes unnecessary band components.

Similarly, the teacher's audio input from the microphone 33 via the input terminal 320 is also sent through the amplifier 321, and the signal from the 5.0 MHz oscillator 322 is sent to the amplitude modulator 3.
23, and a bandpass filter 324 removes unnecessary bands. These band pass filters 316...
The outputs of are added by a resistor mixer constituted by resistors 325 . This audio line 50 branches off midway and is connected to an amplifier 337 via a coil 334, a capacitor 335, and a resistor 336.
37 is connected to a terminal 338 for the teacher's headphone 32, and is also connected to the instruction circuit amplifier 321. The series circuit of the resistor 332 and capacitor 333 has a sufficiently high impedance in the audio band below 10 KHz (1?1>R3,6). In addition, the coil 334
and Cl) The circuit of the C533 resistor 336 has a sufficiently high impedance for a transmission band of 4.5 MHz or higher (IωL334>R332).

Therefore, the resistor 332, capacitor 333, coil 334, and resistor 336 constitute a frequency separation filter, and one audio line 50 can transmit both round and return signals. The audio transmitting/receiving section 40 of the booth section 4 is connected to the eighth
To explain the diagram in more detail, the teacher's voice and program input signals modulated and sent through the audio line 50 have low frequency audio band components removed by a capacitor 400 and a resistor 401, and are sent to a buffer amplifier 402. enter.

The output of this amplifier 402 passes through a resistor 403 with a characteristic impedance ZO and a predetermined bandpass filter 408, and the program signal is transmitted through 5.
2, 5.4, 5.6, 5.8 MHz signals are sent to the program selection switch 413, and the transistor 41
4. Enters a gate circuit 44 consisting of a capacitor 415 and resistors 416 and 417. On the other hand, the signal from the teacher is 5.0
MHz, enters a gate circuit 45 consisting of a transistor 418, a resistor 419, and a capacitor 420, is amplified together with the program output by an amplifier 421, and is demodulated by a demodulator 46 consisting of capacitors 422, 423, diodes 424, 425, and a resistor 426. The signal is further sent to the student's tape recorder 47 and headphone 42 via an amplifier 427 and an output terminal 428. On the other hand, when the voice from the student is sent to the input terminal 429, the transistor 430, the capacitor 431, the resistors 432, 433
, 434, the signal is impedance-converted by a drive amplifier 435, and further sent to the audio transmission line 50 through a mixing resistor 436 and a low-pass coil 437.

This low-pass coil 437 and the capacitor 400,
The resistor 401 constitutes a frequency separation filter. Note that the resistor 438 is a dummy resistor for high frequencies, and the capacitor 439 is I-1>ωCR3 in the audio frequency band.
36, therefore, the influence of capacitor 439 and resistor 438 can be ignored.

Next, the operations and roles of the gate circuits 44, 45, and 48 will be explained.

When the control terminal 440 is at a high level I, the transistor 414 is off, so the gate circuit 44 is on, and the selected program signal enters the amplifier 421 and is demodulated.

At this time, since the transistor 418 is on, the gate circuit 45 is turned off and the teacher's signal is cut off. Conversely, at low level, the program sound is cut off and the signal from the teacher is demodulated. When the other control terminal 441 is set to high level I, the audio signal from the student is cut off, and when it is set to low level D, the audio signal is output.

H. of the control signals at these two control terminals 440, 441. ．． The following four modes can be configured by combinations of L.

(1) When both control terminals 440 and 441 are at H, only the program is received, and the student learns by the program.

(2) When the control terminal 440 is H and the control terminal 441 is L, the teacher monitors the student's learning status.

(3) When the control terminal 440 is L and the control terminal 441 is H, there is a unilateral instruction from the teacher, for example, a unilateral conversation (talk) from the teacher, and a unilateral call from the teacher (connolly). (4) Control terminals 440, 44
When 1 is both L, communication (intercom) is possible between the teacher and student. Next, the control section 31 of the master section 3 will be explained with reference to FIG. 9. Intercom, monitor, call, student number, correct answer number,
Control inputs such as tape recorder control enter from the switch matrix 339, are converted into code signals at the I/0 port 340, and are sent to the central processing unit (hereinafter referred to as 0PU) 341.
data bus 342.

The CPU 34l is a read-only memory (hereinafter referred to as R).
OM) 343, random access memory (
344 (hereinafter referred to as RAM), and sends the result to /0 port 346 for display unit 345, /0 port 347, 348, 349 for external equipment, and from /O port 348, 349, Furthermore, data highways 51 and 5 connect the master section 3 and the booth section 4.
2, 53 is transferred or output.

The data channels 51, 52, and 53 are composed of three lines per 1 series, as described above.

That is, a data sending line 51, a data receiving line 52, and a synchronous sending line 53. These transmission lines 51, 5
Up to 16 booth control units 41 are installed in one series of 2,53
... is connected. The decision on this number is based on the time it takes to send and receive data to all booth sections 4, as data is transmitted in a time-division manner, and the transmission speed of the economical 1/0 port. When increasing the number of
Control can be achieved by adding one data highway 1/O port and 16 booths as one unit.
To explain the booth control section 41 of the booth section 4 with reference to FIG.
3, and the data input terminal 442 is connected to the CPU 44.
4 output terminals for l bits are connected.

The key matrix 445 stores data such as the designated address of the booth, a button to call the teacher, an answer switch, and attendance.
In order to input the signal to U444, an input circuit and seven output circuits form a matrix and convert it into a code signal. C.P.
The output of U444 includes the control output of the tape recorder, which becomes the tape recorder control output 447 after being amplified by the driver amplifier 446, and other outputs 448.
is a control output of the audio line 50, which is connected to the control terminals 440 and 441 in FIG. 8 to control switching of audio signals. Next, the data highway 51, 52,
To explain the operation of the foos control unit 41 of the booth unit 4 based on the signal 53, the data transmission line 51 of the master unit 3 first receives 1 bit of start, and secondly receives 4 of the designated booth number.
Bits and signals are sent in the following order as shown in FIG. 6a.

A preset number is stored in the key matrix 445 in the control unit 41 of the foos unit 4 in the CPU 444.
Compare this content with the code number from master part 3,
The control section 41 of the matching booth section 4 reads the data, outputs a control output, and latches the output at the same time. Next, when data such as the call switch and answer number set in the key matrix 445 is entered into the CPU 444, the output circuit first outputs the start bit, followed by the mode, answer number, and so on. The data is outputted to the data receiving line 52 of the data highways 51, 52, and 53 in the order shown in FIG. b, thereby terminating the transmission/reception mode. When this is completed, the master section starts sending out the next start bit and code for the booth section. Further, the output of the booth section continues to be latched until the next data of the same booth number is sent and output, or until the clear mode is entered from the key matrix 445. In the embodiment described above, only one audio line 50 is used, and talk and program transmission from the master section 3 to the booth section 4, as well as monitor transmission from the booth section 4 to the master section 3, are carried out over the same line.

However, the invention is not limited to this; one line is used for talk and program transmission from the master section 3 to the booth section 4, and another line is used for monitor transmission from the booth section 4 to the master section 3. You can also. In this case, as shown in Figure 4, the frequency band is such that the talk signal remains in the voice band and the program signal is amplitude modulated, and as shown in Figure 5, the monitor signal remains in the voice band. I can do it. In the embodiments described above, the group learning device for language training has been described as covering all functions.

However, it will not depart from the gist of the present invention even if some functions, such as tape recorder control and answer switch functions, are omitted. In the above embodiment, the case where amplitude modulation (AM) is used as audio multiplexing is explained, but the invention is not limited to this. When a sine wave is used as a carrier wave, frequency modulation (FM), phase modulation (PM) can be used. ), but when using continuous pulses as a carrier wave, time-division pulse modulation (e.g. pulse phase modulation (PPM), pulse frequency modulation (PFM),
Pulse amplitude modulation (PAM), Pulse width modulation (PWM),
Pulse code modulation (PCM), etc.) may also be used.

In the embodiment described above, the number of lines connecting the audio transmitting/receiving units 30 and 40 is extremely reduced by audio multiplexing, so in order to balance this, the control units 31 and 41 are configured mainly with the CPU, and the number of lines connecting the audio transmitting and receiving units 30 and 40 is drastically reduced. The number of lines to be connected was limited to three.

However, the control sections 31 and 41 are not limited to those mainly based on the CPU, and in some cases, the conventional control section shown in FIG. 1 may be used as is, or
Alternatively, a method may be adopted in which a group of booth sections are connected through a common control line. In the present invention, as described above, various transmission signals such as program signals, talk signals, and monitor signals are modulated and multiplexed, so only one audio line is required. Therefore, the number of lines can be reduced to a greater extent than in the past. In addition, by providing a gate circuit on the booth side that switches various audio signals, specifically program, talk, and monitor signals, data transmission, data reception, and synchronous transmission lines from the control section of the master section are controlled. A common line can be used for one group of booths (for example, 16 booths), and the number of lines can be further reduced. In addition, the control signal for switching the gate circuit uses a line separate from the audio line and turns on and off the DC power supply, so there is no crosstalk or deterioration of the S/N ratio, and the line can be shared. By using multiplexed signal transmission, even if there is an increase or decrease in the operation mode, it can be handled by the control unit alone, without adding an additional transmission line. Furthermore, if the number of booth sections for one master section is relatively small, one audio line is used from the master section to the booth section, and one additional audio line is used for monitor transmission from the booth section to the master section. In this way, there is no need for a circuit for separating the forward and backward signals, and the space and cost of use can be reduced. Furthermore, since the control units of the master unit and booth unit are mainly configured with a central processing unit, it is possible to easily operate mode switching control, call control, etc. even in fairly complex situations, and the equipment is compact and easy to handle. It becomes easier.

[Brief explanation of the drawing]

Fig. 1 is a block diagram for explaining the outline of a conventional group learning device, and Fig. 2 and the following shows an embodiment of the group learning device according to the present invention. Figures 3 to 5 are frequency distribution diagrams,
FIG. 6 is a coded control signal diagram, FIG. 7 is an electrical circuit diagram of the audio transmitting/receiving section in the master section, FIG. 8 is an electrical circuit diagram of the audio transmitting/receiving section in the booth section, and FIG. FIG. 10 is a detailed block diagram of the control section of the master section and the booth control section of the booth section. 3...Master unit, 30...Audio transmission/reception unit, 31...Control unit, 32...Headphone, 33...Microphone, 312 ~315
, 323...Modulator, 316-319, 324
...Pandass filter, 332-336...
...Frequency separation circuit, 4...Booth section, 4
0...Audio transmission/reception unit, 41...Booth control unit, 42...Headphone, 43...
Microphone, 44, 45, 48...Gate circuit, 46...Demodulator, 47...Tape recorder, 408-412...Band pass filter, 413・・・・・・Program selection switch, 5
0...Audio line, 51, 52, 53...
・Data highway.

Claims (1)

[Scope of Claims] 1. In a device that enables individual communication functions by sending program signals and talk signals from a master section to a plurality of booth sections, and sending monitor signals from the booth section to a plurality of booth sections, the master section has a plurality of A modulator that modulates different carrier waves using program signals and talk signals, and a frequency separation circuit that separates signals from this modulator to the booth section and monitor signals from the booth section. A frequency separation circuit that separates signals from the main section and other booth sections and a monitor signal to the master section, and a demodulator that demodulates the program signal and talk signal from the frequency separation circuit are provided. The frequency separation circuits of the group of booth units in the series are connected by one common audio line, and the master unit is configured mainly of a central processing unit and connects between the master unit and each booth unit and between each booth unit. A control unit is provided in the booth unit, and the booth unit is provided with a booth control unit that is configured mainly by a central processing unit and controls switching within the booth unit, and data is sent between the control unit of the master unit and the booth control unit,
A group learning device characterized by being connected by a data receiving and synchronous sending line. 2. The collective learning device according to claim 1, wherein the modulator is an amplitude modulator, a frequency modulator, a phase modulator, a pulse modulator, or a time-division pulse modulator. 3. In a device that enables individual communication functions by sending program signals and talk signals from the master section to multiple booth sections, and sending monitor signals from the booth section to the master section, each of the program signals and talk signals are sent from the master section to multiple program signals. a modulator that modulates a carrier wave;
A mixing section that mixes this modulated signal and a talk signal in the form of audio is provided in the booth section, and a demodulation section that separates each modulated program signal and talk signal from the master section and demodulates the modulated signal. A first common audio line connects the mixing unit of the master unit and the demodulators of one group of booth units, and a second common audio line is provided as a monitor signal line from the booth unit to the master unit. In addition to connecting via an audio line, the control unit provided in the master unit and mainly based on the central processing unit is connected to the booth control unit provided in each booth unit mainly based on the central processing unit through a data receiving and synchronization sending line. A group learning device characterized by being combined with. 4 Program signals and talk signals are sent from the master section to multiple booth sections, monitor signals are sent from the booth section to the master section, and individual communication functions are enabled.In the master section, multiple program signals and talk signals are sent. A modulator that modulates different carrier waves, and a frequency separation circuit that separates the signal from this modulator to the booth section and the monitor signal from the booth section are provided. a frequency separation circuit that separates the signal from the master section and a monitor signal sent to the master section, a demodulator that demodulates the program signal and talk signal from this frequency separation circuit, and a demodulator that demodulates the program signal, talk signal, and monitor signal. A gate circuit is provided to set the student's self-study mode, the teacher's monitor mode, the teacher's instruction mode, and the teacher-student and student-to-student communication mode, and frequency separation between the master section and one series of booth sections is provided. The circuits are connected by one common audio line, and a control section is provided in the master section and is mainly configured with a central processing unit, and a booth is provided in the booth section and is configured mainly with a central processing unit. A group learning device characterized in that it is connected to a control section through a data sending, data receiving and synchronous sending line. 5. The group learning device according to claim 4, wherein the gate circuit is mainly composed of transistors, and switching control thereof is performed by turning on and off a DC power supply.