SU767812A2 - Device for teaching and testing students - Google Patents

Description

one

The proposed device relates to the field of automation of the educational process and can be used in various educational institutions.

A device for teaching and controlling students' knowledge is known, comprising a response input unit connected to an answer comparison unit and a memory unit connected to the address register by the educational information playback unit and the address comparison unit that is connected to the address register, the educational information playback unit and an attribute detecting unit 15 connected to an answer comparison unit, a training information reproduction unit and a control unit that is connected to the address register, a registration unit and a comparison unit 20 responses connected to an educational information reproduction unit connected to the address register and a registration unit, a random signal generator connected to a counter that is connected to the first input of the address switch, the second input of which is connected to the educational information playback unit. and the output is to the address register iaxid 1.

The disadvantage of this device is that when implementing control programs in the zone there can be only two, four or eight

5 frames. By zone is meant a number of monitoring frames. compiled, as a rule, on one common topic or section of the program and imitals, a common feature in the encoding of the information carrier. The device issues the student one frame at a time from a zone randomly. Very often, depending on the topic, it is necessary that the number of controlling personnel in the zone be Three, five, six, seven. There is a need to repeat the control frames of one content, adding up to four or eight frames, and this leads on the one hand to an uneven selection of frames of different content, which will reduce the reliability of the control / ac of the other — to the uneconomical use of film.

The reason for the drawbacks of this device is the absence of a block defining the number of frames in the zone.

The purpose of the invention is to improve the accuracy of the device and more rational use of the storage medium. This goal is achieved by introducing into the known device 1 a block for changing the volume and discreteness of the training information, connected to the block for reproducing the training information, the block for determining the signs and the counter and made of the elements NOT, AND, S1 and one-vibrator, connected by the input to the first input block, and output to the first inputs of the elements And, the second inputs of which directly and through the elements are NOT connected to the second inputs of the block, the outputs of the elements AND through the corresponding elements OR are connected to the outputs of the block. FIG. 1 shows a block diagram of the proposed device; in fig. 2, the coding of the combined information carrier is given; FIG. 3 is an example of the execution of a new block. The training and controlling device, 4, the device (Fig. 1) contains: response input block 1, response comparison block 2, memory block 3, playback unit 4, registration block 5, address register B, address comparison block 7, feature definition block 8, block 9 controls, a switch 10 addresses, a generator 11 of random signals, a counter 12 and a block 13 for changing the volume and discreteness of educational information. The input block 1 is connected with the response comparison unit 2 and the memory unit 3 connected to the playback unit 4, which is connected to the answer comparison unit 2, the registration block 5, the address register 6, the address comparison block 7, the volume change block 13 and the discreteness of the educational information and the attribute definition unit 8 associated with the address comparison block 7, the control block 9, the block 13 and the comparison block 2. The VOC connected to the control block 9 is connected to registration block 5 and address register 6, to the inputs of which, via the address switch 10, signals come either from the outputs of the counter 12 or from the outputs of the reproduction block 4. The outputs of address register 6 are connected to block 3, a memory, and block 7, an address comparison associated with block 3 of memory. In addition, the random signal generator 11 is connected to the counter 12, the output of the Topiorb is connected to a unit 13 for changing the volume and discreteness of educational information associated with the counter 12. The comparator unit 2, the characteristic determining unit 8, the control unit 9, the generator 11, the counter 12, block 13, address register b, block 7 address comparison and switch 10 are combined into a transmitter 14, Block 1, the input of answers consists of letter buttons for entering answers, a decryption, triggers for storing answers and an algorithm for launching a Lento-pull mechanism. The memory unit 3 contains a data carrier on a film with information frames and control codes printed on it and a reversible tape drive mechanism. The playback unit 4 consists of photo-electric amplifiers of the same type, which convert the photosignals into electrical pulses and amplify them. The registration unit 5 includes an error counter with an AND element on the counting input, a decoder and indicator indicator lights. Before considering the operation of the device, it is necessary to consider the coding of the film (Fig. 2). In the proposed device, the program has three types of codes 15, 16, 17 with various functions in controlling the operation of the device. Type 15 codes contain a possible answer code 18 for comparison with a response code, bit. A mandatory comparison 19, necessary for unconditional comparison with a answer code, bit Wrong 20, intended for entering one penalty point in registration block 5, and the distinguishing feature 21, which serves to identify type 15 codes as a calculator. Distinguishing feature 21 has such a combination of codes in its bits that is prohibited for other types of codes, for example, the third lower bit is light and the second low bit is dark. Type 1.6 codes contain the address of the next frame 22, by which you need to search for the next frame, bit 23. the code of the conversion factor, according to which the conversion factor of the counter 12 is set, and the distinctive feature 24, designed to identify the type of code by the calculator 14 (the third bit from the bottom is dark and the second bit is light). Type 17 codes contain frame code 25, which is a binary frame number and is used for comparison with the address of the next frame, and distinctive feature 26, (the second and third bits are light below). In codes of all types, there is one service bit marker 27, which is intended to form a permissive signal for reading the entire code and is necessary so that information cannot be read from the frames during the motion of the film. The marker must be located below (or above) the frame level, and the signal from the output of the marker photoelectric amplifier 28 is fed to the remaining photoelectric amplifiers 29 - 37 as a resolution. Unit 13 for changing the volume and discreteness of educational information (Fig. 3) contains the logical elements HE 38, 39,

And 40, 41, 42, OR 43, 44, one-shot 45. Counter 12 is made on the triggers 46, 47, 48.

The proposed device works as follows (Fig. 1).

After the response of the students is entered, the response input unit 1 supplies the response code to the transmitter 14 and the tape drive start signal to the memory unit 3. During the motion of the film, the control codes pass by the photosensors of the reproducing unit 4, are read, amplified, and fed to the calculator 14, which, based on the response code and the codes read from the film, searches for the outer frame. The codes are read sequentially while the film is moving. The response code goes to block 2, comparing the answers. Signals are supplied to this block from the bits of the playback block 4 from the photoelectric amplifiers 29-34, reading the response codes and the discharge bit Comparison, and from block 8 of determining possible signs, signals are received that the type 15 codes are read.

In the initial state, the transmitter 14 responds only to type 15 codes. When comparing the response code with the possible response code and if there is a signal from block 8, block 2 outputs a comparison signal to block 9 of the control.

If none of the possible response codes provided were compared with the response code (the student responded in an unexpected way), a type 15 code will arrive, which is the last among type 15 codes that contains the Optional Comparison section and when reading such a code 2 will output a comparison signal to control block 9.

Signal detection unit 8 receives signals from the bits of the playback unit 4, which are occupied by distinctive features, and from block 8, permitting signals on the presence of the type are given. the code in response comparing unit 2, if the code being read is a type code 15, in control unit 9, if the code is type 16, and in address comparing unit 7, if it is type code 17.

The control unit 9 on a signal from block 2 memorizes the presence of a comparison of the response code and the code of a possible answer and generates a short-term signal to record the error in the registrar unit 5, and if in the compared type 15 code the bit is incorrectly incorrect, which of block 4 is supplied to the block 5, then if two signals coincide, block 5 registers and indicates an error. :

After storing the comparison signal of the possible response code with the 6-block code 9 code, the transmitter 14 further reacts only to type codes

16. The first incoming code of type 16 calls for the occurrence of a signal from block 8 of determination. signs in block 13, which is allowing the connection of feedback to counter 12, and thereby changes the conversion factor, in addition, the signal from block 8 goes to block 9. In block 9 of control, a permit signal is generated to write the address of the next frame register 6. The address part of the next frame (several bits) from playback block 4 is sent to address register 6 directly, and the other part of the address (the remaining bits) from playback block 4 is sent to the address register via switch 10.

When registering the address register 6, the switch 10 to the playback unit 4 plays the DEVICE operating in the Training mode and all the address bits of the next frame are sent to the address register from the playback unit. In another position of the switch 10, in the Control mode, part of the bits. the address enters the address register from the outputs of counter 12, which counts the pulses from the generator 11 and has a random code at the time of recording. This code depends on the conversion factor of counter 12, which is specified by the code; conversion factor coming from the playback unit 4 to block 13. Depending on the conversion factor code, block 13 connects the output of counter 12 to the corresponding inputs of the conversion circuits of this counter (not shown in Fig. 1) and topics. by itself changes the conversion factor. For example, the combination 00 sets the operation of the counter 12 with a conversion factor of two to four to eight bits.,

In this case, the zone length setting block does not connect the output of the counter to its inputs and, depending on: the number of connected bits from 1 meter 12, switch 10 to address register 6, a random part of the address of the next frame is formed to search for a frame in an area consisting of or two , or four, or eight frames.

If one random bit is recorded, then there will be two frames in the zone, since this bit may be O or with equal probability if two random bits are recorded, then four frames must be in the zone (four combinations of zeros and units in two bits with equal probability), and if three random bits are recorded, then there will be eight frames in the zone.

Other combinations of the conversion factor code determine the connection of the output 13 blocks of the counter 12 to its input.

So a combination. 01 sets the conversion factor to three and neck .ti. When the switch connects 10 two bits of the counter 12 to the address register, a random part of the address of a random frame is formed and the frame is worn out of six frames, Combination 10 creates a recalculation factor of five, and combination 11 gives a recalculation factor of seven. On a signal from block 9, register 6 - - 1Р§81 --- "ЖВШШае -Ш ре-Next frame 22 completely from playback block 4 or records part of the address of the next frame 21 from block 4 in the record, and writes another part of the address 12, which depends on the state of the switch 10. The address of the next frame is memorized - -Ch & time to search for the next frame. The issuance of the permissive signal of block 9 agapshnyaet and does not enter into the top sitnalov, and the calculator 14 in the future only responds to codes. H: aDresasleDu1oschego Sho-frame, post Payuschie besides switch 10, contains a discharge reverse direction of motion, and if the desired frame is in the side opposite ffeipWSfta faftbHOiyiy napravlenik) movement of the film, the address register 6 takes the reverse signal to the memory unit 3 W th-b 5Rby The direction of the dvd movie film is reversed. The address comparison block 7 produces a one-by-one comparison of the address of the next to the edge that comes from the address register j and the frame code that comes from the playback block 4 when it resolves its signal from the detection unit 8 features (type of available code 17), comparison bottomed When porazr SRI bl.okom 7 outputted audio signal OC tynovku of the deck unit 3 memory. The frame search cycle could be without, comparing the response code. When organizing a line segment of the program XRP from frame to frame, you can implement using one, type 17 code, the frame code in kbtor is all zeros, since in the initial position the address register is in the zero state and when reading the type 17 code from zero yKG kensh frame There is a comparison with the zero address, b. block 8 gives a signal about the presence of a sign of the type code 17 in block 7 ,. but. block 7 generates a signal lfl5cTaHOB hLevent mechanism which enters the block 3 of memory, the address bits of the next frame and the frame code recorded from the playprogram blob, carries service xaiiaKTep, with its help the transition from one zone to another is carried out. This bit d within the same 3 ojjfcJ in the next frame is equal, and in the frame code it is equal to O, in the frames of neighboring zones there should be reverse values: in the address of the next frame this bit is equal to O, and in frame code II t 1 I.: therefore, the overhead in the frame code is a sign that erizuyuschim zone, and a transition from one zone to another is carried out by the service bit row and the random bits from the selected frame region. The device according to the functional scheme works as follows. The first type 16 code causes the signal from the signal definition block to appear in control block 9 and block 13 specifies zone 13 to AND 40 - 42, which allows connection of feedback to counter 12, and Generator 11 supplies high frequency signals to three bits. counter 12, consisting of counting 4y triggers - 48, from the outputs of which the signals are sent to KOMiviyTaTop 10, the network detects the pulses to the state. 111, On the next pulse from the generator 11 are counting, the triggers 46 - 48 are set to PSO, the One-Vibrator 45 by outputting the counting of the counting trigger 48 produces a short signal that goes to the inputs of the elements 40 - 42, and depending on the conversion factor code sets counting triggers 46 - 48 to a certain initial state. If the signals 00 are removed from the amplifiers 34, 35, then the signal at the outputs of the HE elements 38, 39, C of the elements 40 - 44 signals will be absent, and the initial state of the flip-flops 46 - 48 will be LOO. Counter 12 counts the pulses from generator 11 with a conversion factor of two to four to eight bits. If the signal 01 is removed from the amplifiers 34, 35, then the signals in tc at the outputs of the elements HE 38, AND 40, OR 43, Counting triggers 46 - 48 are set to the state 010. In this case, the Coefficient of the best of 46 will be 48 is six, and in memory 47, 48 is three. If the signal 10 is removed from the amplifiers 34, 35, then the signals in tc at the outputs of the elements are HE 39, AND 41, OR 43, 44 and the counter 12 is set to. state 110, the counter conversion factor will be equal to five. And if the signal 11 is removed from the amplifiers 34, 35, then the signals are in TC at the outputs of the AND 42, OR 44, and the counter is set to iOO, the count of the counter will be equal to seven. Depending on the position of the switches, the address of the short addressing register 6 can be written from the control block 9 to write the address of the next frame either completely from the play block 4 or several

bits from block 4 play, and the remaining bits from the counter 12.

When three bits of the counter 12 are connected with a conversion factor equal to eight, the state of the counter 100- is possible. When changing the conversion factor, for example, from eight to five, it is possible to record the state of the counter 12 in the address register 6 before the initial setting 110, which will result in falsely forming the address as follows. Therefore, the enabling signal from the control unit to write to the address register b of the next frame should appear with a delay relative to the signal about the appearance of the type code 16 from the feature detection unit 8 in block 13 on the rem needed to initialize the counting triggers of the counter 12 when changing the scaling factor

The use of this device allows to increase the reliability of the knowledge control, namely: to randomly select a frame from an area with an arbitrary number of frames, and also to use film more economically.

Claims (2)

1. A device for training and monitoring students' knowledge of the author. St. No. 74130-8, characterized in that, in order to increase the accuracy of the device, it comprises a unit for changing the volume and discreteness of the educational information, connected to the educational information reproducing unit, the characteristic determining unit and the counter. 0 2. Device POP.1 characterized in that in it the block for changing the volume and discreteness of educational information contains the elements NOT, AND, OR and the one-shot, connected input to the first input of the block, and the output - to the first / 1 inputs of the elements AND, the second whose inputs directly and through the elements are NOT connected to the second inputs of the block, the outputs of the elements AND through 0 corresponding elements OR are connected to the outputs of the block. Sources of information taken into account in the examination 1. USSR author's certificate No. 741308, cl. G 09 B 7/07, 01.24.77 5 (prototype). IS If 17 / T 22 " gz 20 hch tJ 2.7 27 .15 iS g