SU894698A1 - Device for interrogation of subscribers - Google Patents

Description

(54) DEVICE FOR SURVEY OF SUBSCRIBERS

The invention relates to computing technology and can be used in computer-aided learning systems.

Known devices for polling discrete sensors include a group of buffer registers whose inputs are connected to the outputs of the respective sensor groups, a poll distributor, a control unit, a synchronization unit, and a sensor address generation unit fl.

The disadvantage of these devices is in large hardware costs.

The closest to the present invention is a device for polling subscribers, containing an element AND, the first and second inputs of which are connected respectively to the outputs of the pulse generator and the OR element, and the output through a mode switch with the input of the pulse distributor, the first output of which is connected to the first output switch the input of the OR element, the group of outputs - to the polling inputs of the respective individual consoles, and the second output to the first input of the display unit, the group of outputs of individual bullets; By connecting subscribers to a group of input control block vkodom connected to the second input of the OR gate, the inputs of the indication unit group, a second input connected to the output of the counter, and comparing the responses to the group input unit with the standard, the output connected to the input of the counter 2,

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A disadvantage of the known device is large hardware costs, increasing with an increase in the number of buttons of individual bullets.

The purpose of the invention is to reduce

15 device hardware costs.

The goal is achieved by the fact that a device containing a group of information consoles, the outputs of which are connected to the corresponding

20 inputs of the OR element, the output of which is connected to the information input of the display unit, a pulse generator and a pulse distributor, a group of And elements are entered, a divider

25 frequencies, the resolution pulse shaper and the polling trigger, with you moving each element AND group connected to the corresponding input of the information dialing console, the first input

thirty

with the corresponding output of the pulse distributor outputs, and the second input - with the output of the pulse generator and through the frequency divider with the input of the pulse distributor and the input of the pulse former, enable, output connected to the control input of the display unit, the clock input of which is connected to the output of the pulse generator, input connected to the output of the poll trigger, the single input of which is connected to the input of the device start-up, and the zero input - to the output of the pulse distributor.

The drawing shows the block diagram of the device.

The device contains a generator of 1 pulses, a distributor of 2 pulses, a divider 3 frequencies, a driver. 4 resolution pulses, interrogation trigger 5, device start-up input6, element OR 7, interrogation button 8, information set consoles 9, display unit 10, AND 11 group elements.

The distributor 2 pulses consists of series-connected pulses of the counter 12 and the decoder 13.

Consoles 9 set of information (subscriber consoles) are designed to enter the answer to the current questionnaire questionnaire. It contains serially connected block 14. Buttons of answers, and the number of buttons is determined by the number of maximum possible answers to any question of the questionnaire (for example, we will next assume that block 14 contains eleven answer buttons), the encoder. 15, which converts the response number, for example, into a binary-decimal code, register 16 of the transducer, And 17, and an indicator (for example, an LED) 18.

 The display unit 10 is intended to indicate the same type of subscriber answers. It contains successively connected shift register 19, a group of AND elements 20, the control inputs of which are connected to the output of the driver 4, the expansion pulse, the decoder 21, which converts the binary-decimal response code to the decimal, and the display unit 22, consisting of counting digital indicators 23, which allow summing up the pulses arriving at them and displaying the sum using digital indicators.

The device works in the following way.

The experimenter distributes questionnaires to the surveyed subscribers and introduces them to the rules of answering questions and working with individual consoles. The questionnaire's questions may require answers on any scale, for example, on a ten-point basis, or contain ready-made answers with appropriate sequence numbers. The subscriber must select the scale point or the number of the ready answer and fix it using the remote control 9. The answer can be entered using the BLAC 14 buttons only when the indicator 18 is on. The experimenter, in accordance with the examination program, presses the button 8 The survey and the device automatically reads, summarizes the same type of responses and displays them on digital indicators. In this case, all consoles 9 will be redeemed for the period of the survey, then the inclusion of indicator 18, allowing the input of the answer to the next question. The experimenter records the integral estimates for each answer in special tables. If necessary, digital automatic recording devices are connected to the display unit 10. When the device is turned on, the counter 12 is set to the zero state, and units are written to the registers 16. Since in this case, all the inputs of the And 17 element will contain signals, the indicator 18 is turned on, indicating to the subscriber that the answer has been allowed. The subscriber selects the answer and presses the button of the block 14 corresponding to the answer number. If he does not know how to answer, then he presses the button with the number O. Answer number (or, what

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the same, the number of the pressed button) from the output of the encoder 15 is entered in the register 16. At the same time, the indicator 18 goes out, since one (at least one) of the bits of the register 16 is necessarily zero.

After the experimenter pushes the button 8 and starts the device, the trigger 5 is switched to one and starts the generator 1. The pulses from the output of the generator 1 arrive at the inputs of the elements 11 and through the divider 3 - to the input of the counter 12 pulses and the driver 4.

The first pulse from the output of the 3 pulses divider will write 12 units into the counter. At the same time, at the output of the decoder 13 there is a Wits pulse, which opens the first, element 11, through which from generator 1 to register 16 of the first console 9 four pulses will arrive for reading the response code through element 7 to register 19. At the same time register bit 16 the shift is filled with units, which leads to the inclusion of the indicator 18, which allows the subscriber to give the next answer.

The response code received in register 19 is synchronized and propelled through the eigistrator by generator 1 pulses, and at the moment the fourth pulse ends from the generator 4 output to the control inputs of a group of 20 elements And an impulse is received, with which the response code goes to decryptor 21 to convert to ten and in the form of a single pulse read from one of the outputs of the decoder 21 is recorded in the corresponding digital indicator 23.

If the subscriber did not answer for the time allotted for the answer, units are read from his individual console, which corresponds to the answer of the subscriber. I do not know.

The second pulse from the output of the divider 3, similarly to the above, provides - reading the response code from the second panel 9.

All subscriber consoles are polled in a similar way. Moreover, the same answers are summed up on the corresponding counters of digital indicators 23, which allows to determine how many subscribers have chosen this answer to the question posed. After polling the last console 9 trigger. 5 is set to the zero state by a signal from the last output of the decoder 13, and the survey on the first question ends. The device is prepared for further work. The experimenter reads from the digital indicators 23 the results of the first survey and by pressing the button 8, the survey proceeds to the next one.

Thus, the proposed device at a lower cost of equipment provides a survey of subscriber stations and an indication of the number of different answers.

Claims (2)

1. Author's certificate of the USSR And 634263, cl. G 06 F 3 / 04-, 1976. 2. USSR author's certificate 511583 ,, cl. G 06 F 3/04, 1973 (prototype).