SU1631567A1 - Student performance control device - Google Patents

Abstract

The invention relates to automatics and computer engineering, in particular to devices for the automated control of students' knowledge. The device allows coding of each task question as well as the task as a whole. The length of the code does not change. Information noise is completely eliminated and automation of the coding of tasks is provided, and their decoding is much more complicated. The device is built on the simultaneous use of code redundancy principles in coding assignments and the uniqueness of responses to each assignment code. The purpose of the invention is the expansion of the didactic capabilities of the device and the elimination of information noise. The device contains a learner response input unit 2, a registration unit 24, AND elements 15, 16, a task code indication block 11, a task code register block 12, a task code converter block 13, a comparison block 14, a generator, a driver 8, a switch 9 and a distributor 10 pulses, task code unit 28, response code converter unit 5, code switch unit 6, and operating mode switch 19. 1 il. SO with

Description

The invention relates to automation and computer technology, in particular to devices for automated examinations, examinations and consolidation of knowledge of students in the study of new material, and can be used in various educational institutions.

The purpose of the invention is the expansion of didactic capabilities and the elimination of information noise of the device.

The drawing shows a functional diagram of the proposed device.

The device for monitoring the knowledge of students contains a response input node 1, which includes η buttons, the number of which is equal to the number of different elements used to generate a response to the ticket, register 2 for fixing the pressed buttons in the response input process, button 3 node, encoder 4, block 5 response code converters, consisting of converters that convert the triad code into a four-bit code, block 6 code switches, 7 pulse generator, 8 pulse shaper, 9 pulse switch, 10 pulse distributor, block 11 indication of the reference code, block 12 registers of the reference code, consisting of m four-digit registers with parallel recording of information, block 13 of converters of the reference code, consisting of m converters, converting the four-digit decimal digit code of the task code into the triad code, comparison block 14, element And 15, Element And 16, the recorder 17 of the correct answer, the registrar 18 of the wrong answer, the switch 19 of the operating mode, the shapers 20-22 pulses, the element OR 23, block 24 registration, block 25 input response actions of the student, the counter 26 , a decoder 27 and a task code input unit 28.

Each button of block 25 is assigned a specific symbol. The number of buttons of the block 25 can be selected over a wide range. They can be numbered or assigned to them certain symbols depending on the specifics of the subject, in the study of which a control device is used. The total number of buttons of the block 25, it is advisable to choose a multiple of three. When the number of buttons increases, the bit depth of the task code increases, since for each decimal digit of the task code there are three buttons of block 25.

The outputs of block 25 are numbered and connected to register 2, where each output ^ has its own button. At these outputs, in the process of entering the responses, a binary code is formed - the response code, where the units correspond to the pressed buttons.

All outputs of register 2 are randomly grouped into triads (groups of three bits) and, in this form, are sent in parallel to blocks 5 and 14.

Block 5 is built on programmable matrices, where conversion tables are constantly programmed. Each triad of the response code from register 2 goes strictly to its own matrix. For each triad, the conversion tables are compiled at random and written into matrices during the manufacture of the device. Tables may be the same, however, to improve stability against guessing the coding system of the correct answers, it is advisable to make all the tables different.

The code of each triad is converted into a four-digit binary decimal code using a programmable matrix. Block 5 is used only in job encoding mode, i.e. to convert the answers entered through block 25 into the task code, which is recorded in the registers of block 12 and displayed on the indicators of block 11. Each triad is associated with a certain bit of the task code. As a result of the conversion of the three-digit binary code of the triad into a four-digit binary decimal code, code redundancy is formed. In the table, each binary triad is assigned one value of the four-digit output code and one value of the decimal equivalent, and for the LLC code, which corresponds to the unpressed buttons in this triad, the output code 1111 and three values of the decimal equivalent are assigned. These values for each triad are chosen arbitrarily, which is very important, because it allows you to generate different codes of the ticket task that have the same answers, and thereby protects the correct answers from guessing;

The generated code enters block 6, which consists of eight-input circuits of the code switch. The four inputs of each of them receive a code from the output of encoder 4, and the other four inputs receive a four-digit output code of the corresponding converter of block 5. The four-digit outputs of each of the switches of block 6 are connected to the first inputs of the corresponding registers of block 12. Depending on the operating mode of the device, the outputs of block 6 the code is switched from the output of the encoder h or from the outputs of block 5. In the encoding mode of the job, the code of block 5 through the switches is

163-567 ka 6 is recorded in the registers of block 12, and in control mode, the code of block 4 is recorded.

In the task coding mode, each triad after conversion in block 5 through the switches of block 6 is recorded in the corresponding register of block 12 in the form of a four-digit binary decimal code, and in the control mode when entering the task code, each decimal digit entered through the keyboard of block 28 is converted by the encoder 4 8 is a binary-decimal code and, through blocks 6, enters all the registers of block 12 in parallel. la 10.

Block 12 consists of four-bit registers with parallel recording. The information received at the inputs is written into the registers by the pulses of the distributor 10. The pulses of the distributor 10 are formed sequentially at the outputs, synchronously with the pulses arriving at its input. Impulses to the input can come either from the generator 7 (in coding mode), or from the shaper 8 (when entering the task code). The switch 9 provides in the coding mode the passage of pulses from the generator 7, and in the control mode of knowledge when entering the task code from the shaper 8.

The coding mode is characterized by the continuous scanning of write pulses to all the registers of block 12, which ensures constant rewriting of the response code that changes from the input process of the responses coming from block 5 to block 12. The knowledge control mode during entering the task code is characterized by the fact that the write pulse arrives only at the register where the current bit of the job code should be written. In this mode, the recording pulse is generated synchronously with the pulse coming from the shaper 8, which generates it when any button of block 28 is pressed. The job code is recorded starting from the highest order, and therefore, the recording pulse first goes to the first register of block 12. The next bit is written into the second register of block 12 and so on until the mth register.

Block 13, like block 5, consists of programmable matrices, into which, when the device is manufactured, tables for the inverse transformation of four-digit binary decimal codes are written to the registers of block 12 (digits of the job code) into a binary triad code. In the output code of block 13, the distribution of units fully characterizes those responses.

which must be entered into the device through block 25. The structure of this code is identical to the structure of the code received from the outputs of register 2, after entering the correct answers.

The need for block 13 is explained as follows. Any answer entered using block 25 has its own unique output number for block 5, and during control, different numbers can be written to the registers of block 12 due to the redundancy that occurs when encoding tasks. Therefore, block 13 is necessary so that all task codes characterizing the same answer are presented as a single output number that matches the output number of register 2 into which the correct answers are entered.

The registrars 17 and 18 fix the signal from the outputs of block 14. The main element of the registrars 17 and 18 is the trigger. Registrars are interconnected in such a way that the operation of one registrar on a given issue excludes the operation of another registrar. Thanks to such a construction of the scheme, the selection of answers is impossible when the task code is typed. Reset loggers 17 and 18, i.e. their translation into an active state is performed by the shaper 21 (total reset pulse).

The switch 19 is used only by the teacher when coding tasks, and therefore it is desirable to place it on the rear panel of the device in a place inaccessible to the student. The status of this switch determines two modes of operation of the device. The first mode is task coding, and the second is the student’s knowledge control mode. The first mode is used by the teacher at the stage of coding their assignments.

The device operates as follows.

Let the device be in encoding mode. From switch 19, the signal is fed to the control inputs of block 6 and switch 9. Switch 9 is opened to pass pulses from the generator 7 to the input of the distributor 10. In this mode, the recording pulse is continuously scanned sequentially across all registers of block 12.

The teacher using the buttons of block 25 enters the device answers to ticket questions. The answer can be any number of pressed buttons. Let, for example, the buttons of block 25 be numbered in a sequence from 0 to 20 and the answer to the task is a series of numbers 5; eleven; 18; 2. The teacher, by pressing the appropriate buttons of block 25, enters the entire list of correct answers to this task into the device. In this case, at the output of register 2, a binary code is formed, conditionally divided into triads. The generated code is fed to the inputs of block 5. Each converter of block 5 converts the individual triad of the response code into a four-digit binary decimal code. At the inputs of block 5, a four-digit binary decimal code is generated, which through the switches of block 6 goes to the inputs of the corresponding registers of block 12. The code of block 5 is only the basis for generating the task code. The generated code is fixed in the block registers by 12 pulses from the distributor 10 and is sent to the indicators of block 11, where the decimal indication of the task code corresponding to the entered answers occurs.

On some indicators of block 11, a special sign may be displayed instead of numbers (we will call it the sign of additional definition). The presence of this sign in one or more bit of the task code indicates that not one of the three buttons of block 25 is assigned, assigned to this category of the task code. When forming the task code, the teacher should write down specific numbers instead of these characters, the value of which is selected from three digits of code redundancy, preferably individual for each category of the task code. It is not difficult to carry out an additional definition, having in front of you a list of additional numbers for each category of the task code. This completes the encoding and the generated code is written to the ticket.

Having created a sufficient pool of coded assignments, the teacher can use the proposed device to control the knowledge of students in their specialty. Knowledge control is carried out on the same device, for which switch 19 is transferred to the corresponding position. Using the button of the shaper 21, the device is restored to the initial state and the buttons of block 28 enter the task code bit into the registers of block 12, which is displayed on the indicators of block 11. These actions are already carried out by the student, checking the correctness of his answers to the questions of the task. The entered numbers in the encoder 4 are converted into a four-digit binary decimal code, which is transmitted through the switches of block 6 to the inputs of all the registers of block 12 and, by the write pulse from the distributor 10, which arrives synchronously with the push of a button on block 28, is written to the required register of block 12, t. e. the write pulse determines the register number of block 12, where it is necessary to write the current bit of the job code. The entered job code is displayed sequentially, bit by bit, on the indicators of block 11.

Each decimal digit of the job code, recorded in the registers of block 12 by a four-digit code, enters the converter 13, where this code is individually converted to a triad code. With this transformation, the reverse selection of the entire set of correct answers to the task with this code occurs from the job code. At the output of block 13, a binary code is generated, which is fed to the inputs of block 14. The code received at the output of block 13 completely configures the device for the system of correct answers for this code.

Then, using the keyboard of block 25, the student enters into the device answers that are stored in register 2 and fed to the inputs of block 14. If the codes match completely, a signal is generated at the first output, if not, then at the second. When you press the response ready button for the shaper 22, the signal from the first or second output of block 14 through the elements 15 and 16 is fed to the input of block 24. The operation of the registrars 17 and 18 leads to the light bulb Correctly or Wrong, respectively.

Claims (1)

Claim A device for monitoring the knowledge of students, containing an input unit for responding to the actions of the student, a registration unit, first and second I elements, a pulse generator and a pulse distributor, characterized in that, in order to expand the didactic capabilities of the device, a unit for entering the task code is entered into it, a block response code converters, pulse shaper, pulse switch, code switch block, operating mode switch, task code display unit, task code register block, task code converter Ia, a comparing unit, first and second outputs are connected to first inputs of the first and second AND gates, the inputs of the first group - with the respective information input unit outputs the response learner and the inputs of the second group - with soot9 The corresponding outputs of the block of task code converters, the inputs of which are connected to the corresponding outputs of the block of task registers connected to the corresponding inputs of the block of indication of the task codes, the information outputs of the response response input unit of the learner are connected to the corresponding inputs of the block of response code converters, the first control output - with the second inputs the first and second * elements And, and the second control output, with the installation inputs of the pulse distributor, the register block of the job codes and and registration, the first and second information inputs of which are connected respectively to the outputs of the first and second elements And, the information input of the pulse distributor is connected to the output of the pulse switch, and the outputs are connected to the corresponding control inputs of the register block of the job codes, the information inputs of which are connected to the corresponding outputs of the switch block codes, 5 whose control input is connected to the output of the mode switch, the information inputs of the first group - with the corresponding information the outputs of the input unit for entering the task code, the information inputs of the second group with the corresponding outputs of the unit for converting the response codes, the input of the pulse shaper is connected to the control output of the input unit for the task code 15, and the output is connected to the first control input of the pulse switch, the second control input of which is connected to the output of the switch for selecting the operating modes, and the information input is from the output of the pulse generator. The state of the triad buttons Output Conversion Example Decimal equivalent of output code ABC 001 0001 1 010 0011 3 011 1000 8 100 1001 9 101 0000 0 110 0100 4 111 0110 6 000 1111 2 000 1111 5 000 1111 7