SU519700A1 - A device for interfacing the meters with the computer - Google Patents

Description

upon the completion of the formation, each ordinate of the transformed function of immediate interruption of the computer operating in the time-sharing mode, which increases the time needed to solve other tasks.

The time interval during which the interruption is performed to enter information into the computer is constant in this device and does not depend on the number of simultaneously connected frequency sensors. This limits the number of simultaneously operating peripheral devices of a slow channel with a higher priority and peripheral devices of a fast channel.

The purpose of the invention is to increase work efficiency by reducing machine time costs and interrupt priority priority requirements.

This is achieved by introducing an exchange standby unit into the device, the first, second, third and fourth inputs of which are connected respectively to the second output of the communication unit with the computer, the second output of the address setting unit, the output of the ordinate beginning forming unit and the output of the end forming unit ordinate, the output is connected to the fourth input of the communication unit with the computer, the third input of the interrupt request generation unit and the second input of the ordinate formation unit.

The device wait forming unit of the device contains a trigger. The trigger output is connected to the first inputs of the elements “AND, the second inputs of the elements“ AND to the second input of the block, the third inputs to the third input of the block. The outputs of the AND elements via the first OR element are connected to the output of the block, the first trigger input through the second element OR to the first input of the block and the output of the delay element whose input is connected to the third input of the block. The second input of the trigger is connected to the fourth input of the block.

Diagram of the device shown in the drawing.

It consists of block 1 of the formation of the ordinate; block 2 task time; switch 3; block 4 forming end of ordinates; interrupt request block 5; BLOC 6 address assignment; frequency converter 7 to code; block 8 forming the beginning of the ordinate; a communication unit 9 with a computer; an analysis end signal generating unit 10; block AND wait waiting for exchange, hold trigger 12, elements OR 13, 14, delay element 15, elements AND 16, 17; input 18 output 19 of the device.

The device works as follows.

Information from each sensor in the form of a frequency-pulse code is fed to the input of the ordinate formation unit 1, in which it is time-quantized, and during fixed time intervals in the form of ordinates

issued via switch 3 to frequency converter 7 to code.

The required quantization period and the accumulation time of the ordinate value are set by block 2, which controls the operation of the ordinate formation unit 1 and the switch 3. The latter provides the sequential input of ordinates of simultaneously working measurement sensors by sequential

switching to the input of converter 7. In the converter, information is converted into binary code.

At the end of each ordinate in block 4, the formation of the end of the ordinates is formed

The impulse that enters interrupt request block 5.

At the same time, in block 6 of setting the address, one of the eight outputs generates a signal indicating the address (number) of the sensor,

the ordinate of which was formed According to the signal "End of ordinate from block 4 and its host address from block 6, in block 5 an interrupt request is sent to the computer through block 9.

Block 9 establishes a command interaction with a computer, as a result of which the machine generates a signal “Exchange. This signal from the converter 7 reads the ordinate and through block 9 in the standard for

The computer form is fed to the digital input of the machine. Signal "Exchange with. The computer must arrive before the next ordinate of any channel. Otherwise, in block 11 of the expectation of exchange, the signal "Failure" is generated, which indicates that the computer did not receive the previous information (ordinate).

The signal formation scheme "Failure works as follows.

According to the signal of the end of formation of each ordinate, coming from block 4, trigger 12 is set to a single co-operation. Iodine control of a single potential of a trigger (in case the computer did not form

the signal “Exchange), the address of the sensor making the request, according to the signal of the beginning of the next ordinate of any sensor, the corresponding element“ And 16, ”is triggered. 17. Through the element "OR 13 the signal is formed

“A failure that comes through block 9 in the computer and at the same time closes the formation of the ordinates of the corresponding sensor.

Through the delay element 15, the trigger 12 is set by the signal "Yachalo ordinat,

coming from block 8 to the initial (zero) state.

Thus, the time during which the machine must satisfy the device request is determined by the quantization period and

the number of working sensors. It is minimum with eight working sensors and maximum when one sensor is working. If there is no information from any sensor in the signal generation unit 10, the analyzer produces a signal

"The end of the analysis that terminates the interface of this sensor with the computer.

Claims (2)

Invention Formula A device for interfacing the measuring instruments with a computer, containing an ordinator forming unit, the first input of which is connected to the first output of the time setting unit, the outputs are connected to the inputs of the ordinate formation unit, forming the beginning of the ordinates, setting the address and the first input of the switch, the second input connected to the second output of the time setting block, the output is connected to the “first, input of the frequency converter to the code, the information input of the device is connected to the information inputs of the block and the formation of ordinates and the unit for forming the signal of the end of analysis, the output of which is connected to the first input of the communication unit with the computer, the second input of which is connected to the output of the frequency converter in the code, the third input to the output of the interrupt request generation block, the first and second inputs of connected respectively to the first outputs of the forming unit of the end of the ordinates and setting the address, the first and second outputs of the communication unit with the computer are connected respectively to the output of the device and to the second input azovatel frequency code-luminant differing in that, in order to increase performance by reducing the cost of machine time and requirements for the interrupt priority it entered the sleep exchange unit forming first, second, third and fourth inputs of which are connected respectively, with the second output of the communication unit with the computer, the second output of the address setting unit, the output of the ordinate beginning formation unit and the output of the ordinate end formation unit, output connected to the fourth input of the communication unit with the computer, the third input of the interrupt request generation unit and the second input of the ordinate forming unit. 2. The device according to claim 1, that is, so that the block forming the waiting exchange contains a trigger, the output of which is connected to the first inputs of the elements "AND, the second inputs of which are connected to the second the input of the block, the third inputs to the third input of the block, and the outputs of the elements "AND through the first element" OR connected to the output of the block, the first input of the trigger through the second element "OR connected to the first input block and the output of the delay element, the input of which is connected to the third input of the block, the second input of the trigger is connected to the fourth input of the block. HcT04HiiKK information taken into account during the examination: 1. Auth. St. No. 330457, M.C. Q 06 F 15/46, 03.12.71. 2. Auth. St. No. 442484, 01.23.73.