SU1441378A1 - Information input device - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used to enter information about analog sensors into a computer. The aim of the invention is to expand the scope of applications due to the organization of the monitor mode and the continuous information input mode, which ensure the economical use of computer memory during repeated cyclical polling of analog sensors. The device contains a switch 2, analog-to-digital converter 3, counters 4, 9 and 10, registers 5 and 6, control unit 12. The goal is achieved by entering an additional register 24, two triggers 25 and 26 of two elements OR 29 and 30, two elements AND 27 and 28. Additional elements allow the monitor 10 to load the initial value in the monitor mode at the end of the scan cycle, therefore the data are as follows (L WITH

Description

one

The invention relates to automation and computer technology and can be used to input information from real-time analog sensors into a computer.

The purpose of the invention is to expand the scope by organizing the monitor mode and the continuous information input mode.

The drawing shows a block diagram of the device.

The device contains analog inputs 1 of the device, switch 2, analog-to-digital converter i (ADC) 3, first counter 4, first 5 and second 6 registers, comparison unit 7, digital inputs 8 of the device, second 9 and third 10 counters, address outputs P device, control unit 12, device information outputs 13, device start input 14 device request output 15, device exchange end output 16, device recording 17 input, control unit inputs 18-20, first 21, fourth 22 and fifth 23 block inputs control, third register 24, first. 25 and second 26 triggers, the first 27 and second 28 elements AND, the first 29 and second 30 elements OR.

The device works as follows.

First, register 24 is loaded on inputs B from a computer with a starting address. memory array, where measurement results are transmitted in direct access mode. Then the computer loads the counter 9 on inputs 8 with a number in the additional code, which determines the total number of measurements. Next, the computer sends the code of the initial analog input to the inputs B of the device

0

five

0

The second is written to register 5, and the code of the final analog input, which is written to register 6, the device being ready

to work.

The computer starts measurements with a start signal, which through input 11 of the device enters the element OR 30 and causes the recording of the starting address of the memory array from register 24 to the third counter 10. With this start signal, control unit 12 generates a signal at its fifth output 23, which records the contents of register 5 to the first counter 4. In addition, the control unit 12 generates an ADC conversion signal at a first output 21 through a delay. The value of the setting is determined by the time required for switching the analog channel, whose address is specified by the first counter 4. Analog-to-digital conversion is performed. Upon completion, its A / D converter 3 generates a conversion end signal, which enters the clock input of counter 4, increases its contents by one, and thus switch 2 selects the next analog input 1. In addition, the conversion signal is also fed to input 19 of the control unit. As a result, the control unit 12 issues a request to the computer for direct memory access at the output

5 15 devices and simultaneously starts analog-to-digital conversion via the next input.

The computer, upon receiving a request for data input in the direct access mode, reads the address of the memory to the devices on the outputs 11 from the counter 10 and writes the result of the analog-to-digital into it

0

0

3U

conversion, which of ASCH1 3 is output to the outputs 13. After the result is recorded in the memory from the computer, the signal of the recording end is received at the input 17 of the device. By this signal, control unit 12 removes the request for direct access at the device output 15 and generates an increment pulse of the second 9 and third 10 counters at its fourth output 22, preparing the address of the next cell in the computer memory array.

Five modes are possible in the device: address, scan at specified limits, multiple cyclic polling, monitor mode, and continuous mode. Data input in the first four modes is carried out until counter 9 overflows, the signal of which is fed to input 18 of control unit 12, which causes the output of the exchange signal at output 16 of the device. The selection of the first three modes is determined by the ratio between the codes loaded into registers 5 and 6 and into the second counter 9, and to select the monitor mode and continuous mode, it is necessary to set the mode indication triggers respectively 25 and 26 on the device inputs 8.

In the address mode, only one analog-to-digital conversion is performed on the input addressed by register 5. In this mode, counter 9 is loaded with all units to specify only one conversion.

In the scan mode, the number of transformations loaded into counter 9 corresponds to the difference of numbers in registers 6 and 5 in the specified limits. In this mode, the selected group of analog inputs 1 are sequentially polled. When the upper limit counter 4 is reached, the operation ends. will overflow the counter 9.

In the third mode, cyclic, one command from the computer performs multiple scans on the specified input area 1. This mode at the beginning of the operation is performed similarly to the second mode before polling input 1 corresponding to register 6. At this point, the comparison unit 7 generates a counter match signal 4 with a register 6. After the conversion is completed on this channel, the control unit produces, through its fifth

four

exit 23 reloading the first counter 4 with the starting address of the selected input area I from register 5. Thus, in this mode, in this mode, multiple alternate measurements of the signals from the initial selected channel to the final selected channel are performed, and then again from the same initial

addresses and so dalvr. until the counter is full 9.

In the fourth mode, the monitor, the computer at the initialization stage of the operation before forming the trigger signal

measurement in contrast to the cyclic mode sets the trigger 25. Further, this mode is performed similarly to the cyclic mode until the generation of the signal by block 7 coincides, i.e. until the end of one scan cycle. At this moment, when the first counter 4 is reset, the starting address of the selected input area 1 in monitor mode is the output signal

23 control units 12, through elements AND 28 and OR 30, reloads the third counter 10 with the starting address of the computer memory array from the third register 24. Therefore

the data of the next scan cycles is transmitted to the same memory area as in the previous cycles, i.e. data of each channel is entered during the entire measurement time in one

the same memory location, separate for 1 channel each.

In the fifth mode, a continuous computer (Shred, by launching an operation on input 8 of the device, sets the second trigger 26. After the operation starts, multiple scans are conducted within the selected boundaries with data input into the same predetermined area of the main memory of the computer.

It is the same as in the monitor mode, except that the input of analog information is continuous. At the moment of overflow of the counter 9, the passage of the signal p of the output of this

the counter in control unit 12 is blocked by AND 27, since at its first input there is a signal from the inverse output of trigger 26. Therefore, control unit 12 does not output to

Computer signal end of the exchange,

- one

The management program processes the input data based on this analysis or on the basis of other data.

either condition stops continuous mode.

This arrangement of data in monitor mode and continuous mode allows you to simplify and speed up the processing of results for certain tasks.

The data processing program, using parallel input data, processes the results as they arrive in the memory in the direct access mode.

Thus, extending the functionality by introducing a monitor mode allows multiple cyclic measurements to be made with a significant reduction in the required size of the memory allocated for the received data. The reduction in the amount of memory for the monitor mode will be n times as compared with the cyclic mode, where n is the number of scanning cycles,

Continuous mode is especially effective for control systems when, in advance, prior to the measurement, it is not known for how long the measurements should be taken or how many transformations need to be performed.

Claims (1)

Invention Formula A device for inputting information containing a switch, an analog-to-digital converter, three counters, a control unit, a comparison unit, two registers, the outputs of the first register are connected to the installation inputs of the first counter, the outputs of which are connected to the inputs of the first group of the comparison unit and the address inputs the switch, the output of which is connected to the information input of the analog-digital converter, the information outputs 1 of which are the information outputs of the device, the information inputs of the switch are tax input device, comparing unit output is connected to a clock input of the control unit, a first output connected to the input of an analog-digital start preobrazova6 bodies, the input of the end is transformed and which is connected to the clock input of the first counter and information the input of the control unit, the second and third outputs of which are respectively the outputs of the end of the exchange and the device request, the fourth output of the control unit is connected to the clock inputs of the second and third counters, the five output of the control unit is connected to the gate input of the first counter, the installation inputs of the second counter, inputs the first and second registers are digital inputs of the device, the outputs of the second register are connected to the inputs of the second group of the comparison unit, the outputs of the third counter are address outputs the device, the start input and the gate input of the control unit are respectively the start and end recording inputs of the device, which are characterized by the fact that in order to expand the field of application due to the organization of the monitor mode and the continuous input mode of information, a third register, two triggers, two AND elements are entered into the device, two OR elements, inputs of the third register and triggers are combined with the inputs of the first register, outputs of the third register are connected to the installation inputs of the third counter, output the first trigger is connected to the first input of the first OR element, the second input of which is connected to the direct output of the second trigger, the inverse output of which is connected to the first input of the first element And, the second input of which is connected to the output of the second counter, the output of the first element And is connected to the input of the stop a control unit, the fA output of which is connected to the first input of the second element AND, the second input of which is connected to the output of the first element OR, the output of the second element AND is connected to the first input of the second element OR, the output which is connected to the gate input of the third counter, the second input of the OR element is combined with the start input of the control unit.