SU412603A1 - - Google Patents

Description

one

The invention relates to telemechanics and automation and can be used in digital information collection and processing systems, in particular, in centralized control machines.

At a number of control objects, for example, at multi-shop compressor stations of main gas pipelines, information about pressure, temperature, etc., can be received from sensors in the form of a binary code, frequency, and time interval.

For recording and visual indication of the parameter values, the signals from the sensors are converted into a binary-decimal code.

A device for converting a binary code into a binary-decimal is known, which consists of a subtracting counter connected by a coincidence circuit, a binary decimal counter, a generator of switches and a valve. The binary code to be converted is written in parallel to the binary counter, after which the valve opens and a pulse is sent to both counters from the generator, when the binary counter returns to its initial state, the coincidence circuit closes the valve. As a result, the binary-decimal code is recorded in the binary-decimal counter. However, a device can perform only one kind of conversion.

The purpose of the invention is the expansion of functional capabilities (conversion to a binary-decimal code of a binary code, the time of impulse and frequency signals) and the simplification of the device.

To do this, a Kodgand block is entered into the device, the outputs of which are connected respectively to the input of the code writing block, the second inputs of the subtractive binary counter, and

a binary-decimal counter and two-position control inputs; P1b: X switches, the pulse input of the second key is connected via the first two-position switch to the output of the Binary binary counter, the control inputs of the keys are connected through the second two-position switch to the output of the coincidence circuit, other inputs two-digit switches are connected to the input of the device.

With the help of a block of commands and two-position switches, depending on the type of input signal, the connection scheme of the main converter nodes is changed. This allows the same nodes to be used.

converting various signals, which significantly reduces the number of elements and increases the reliability of the device. The switches are controlled by a command block.

The block diagram of the signal converter consists of a subtractive binary counter /,

the output of each bit of which is connected to the coincidence circuit 2. The installation inputs of the meter triggers are connected to a code 3 recording unit, to which a binary code is converted from terminals 4. The input of the counter is connected to the output of the key 5. One of the triggers of the subtractive binary counter 1 is connected to terminal 6 of the two-position switch 7, the terminal 8 of which through the key 9 is connected to the input of the binary-ten counter 10. The control inputs of the keys are connected together and connected to the terminal / / two-position switch 12. The terminal .13 of the switch 12 is connected to the terminal 14 of the switch 7 and to the input terminal 15. The command block 16 has three input terminals, 77, 18 and 19 and is connected to the input of the code 3 recording unit and the inputs of the installation of 20 meters / and .ten. The output of the coincidence circuit 2 is connected to the terminal 21 of the switch 12. The output of the stabilized pulse generator 22 is connected via a switch 5 to the counting input of the counter 1. The result of the conversion in the form of a binary-decimal code is retrieved from the terminals 23 of the counter 10. The block of commands 24 connects to the control switch inputs 7 and 12.

The device works as follows.

When converting a binary code to the terminal 17, a pulse is received allowing the conversion. With the arrival of this pulse, the command block 16 sets bus counters to the zero state via bus 20. After installing the counters, the command block (16 generates a pulse arriving at the code 5 write block, as a result, the code from terminals 4 is written into the subtractive binary counter /. After writing the code, the command block 16 sets dip switches 7 and 12, which can be of any type ( relay, electronic p. p.), to the operating position, namely: switch 7 is connected to terminal 6, and switch 12 to terminal 21. If a binary number is written to the counter / not equal to zero, then the output of the coincidence circuit is 2 signal keys 5 and i9 will be absent the counter input will start to receive pulses from the generator 22, and to the input of the counter 10 - from the output of the counter / until the counter / comes to the zero state, after the transition of the counter 1 to the zero state at the output of the coincidence circuit 2, the Wits signal and the keys 5 and 9 are closed. At the same time, the number of pulses proportional to the number recorded in the counter is passed to the counter 10, and the conversion cycle ends.

When a frequency signal is converted, a pulse allowing the conversion is applied to the terminal .18 and the command block sets the counters to the output state. After installing the counters / and 10, the command block connects the switch 7 to the terminal 14, and the switch 12 to the terminal 21. After installing the keys, the command block 16 sends to the counter / start-pulse input, after which, at the output of the coincidence circuit, the signal disappears and the keys 5 and P open.

The counter 1 begins to fill with pulses from the generator 22, and the counter 10 with the measured frequency coming from the input terminal 15. After some time,

the capacitance of the counter / and the pulse frequency of the generator 22, the counter / will come to the zero state and the keys 5 and 9 will be closed by the output signal of the coincidence circuit 2, while the counter 10 will record a number proportional to the measured frequency.

When converting a time-pulse signal, the enabling pulse is applied to terminal J9. The command block with the arrival of this ignition sets the counters to the initial state, and the switches 7 and 12, respectively, are connected to terminals 6 and 13. In this case, the control inputs of keys 5 and 9 are connected to terminal 15 and when this terminal arrives the pulse, the duration of which is to be measured, the keys 5 and 9 are opened. The pulses from the generator 22 begin to fill the counter 10, which in this case plays the role of a frequency divider. The number of impuls, counted by the counter 10,

proportional to the duration of the input pulse. At the end of the input pulse, the keys 5 and 9 close the Either, and the result of the conversion can be read from the terminals 23.

Subject invention

35

A signal converter containing a subtractive binary counter with a code writing unit, a matching circuit connected to

the outputs of the subtracting binary counter, a stabilized emulsion generator, connected via the first key to the counting input of the subtractive binary counter, a binary counter whose counter input is connected to the output of the second key, and two dip switches, in order to extend the functionality and simplify device, a block of commands is entered into it, the outputs of which are connected respectively to the input of the code writing block, the inputs of the installation of the subtractive binary counter and the binary-dec the primary counter and the control inputs of the on / off switches, the pulse input of the second key is connected via the first two position switch to the output of the subtracting binary counter, the control inputs of the keys are connected via the second two position switch to the output of the matching circuit

other inputs of dip switches are connected to the input of the device.

17 18 fy

f f f

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