SU765798A1 - Device for interfacing computer with sensors - Google Patents

Description

the group of elements And, and the output register, the first group of information inputs of which are connected to the outputs of the matching node and the corresponding input of the element OR, and the output and control input are respectively the information outputs and the control input of the device, the inputs of the first group of drivers of pulses are corresponding inputs discrete sensors, conversion start-up nodes, reference voltage generators, zero-organs, time pulse generator, time pulse counter, the first input Each pulse generator of the second group is connected to the output of the corresponding conversion triggering unit, the input of which is connected to the corresponding input of the analog sensors of the device and the first input of the corresponding null organ, and the output via the reference voltage generator to the second input of the same null organ output connected to the second input of the same pulse generator of the second group, the output of the OR element is connected to the first input of the switch, the second input connected to the output of the generator is a pulse in time, and the first input - to the input of the time pulse counter, the output of which is connected to the information inputs of the AND elements of the group, the control inputs of which are connected to the second output of the switch and the control output of the device, and the outputs -. with the second group of information inputs of the output register.

The drawing shows a block diagram of the proposed device.

The device contains the conversion start nodes 1, the reference voltage generators 2, null organs 3, the first and second pulse generator 4, the encoder 5, the matching node 6, the OR element 7 output register 8, the time pulse generator 9, the switch 10, the counter 11 pulses of time, elements And 12 groups and the communication line 13.

A conversion start node 1, for example, consists of a source 14: nominal voltage, a voltage-frequency converter 15, and a constant-current scaling amplifier 16. The drawing also denotes the inputs 17 of analog sensors, the INPUT1 18 discrete sensors, the information output 19 of the device, the control input 20 and the output 21 of the device.

Nodes 1 determine the time points for the start of data input from one or another analog sensor to a computer. Generators. 2, ensure the creation of a standard that changes in eemeni according to a known law.

stresses. Null organs. Three comparison circuits provide a single pulse when the voltage across the associated sensor coincides with the corresponding reference genset. Shaper 4 serves to form its output a single voltage pulse of a predetermined duration when a pulse arrives at one of its inputs. The node 6 is used to restore the shape of the bit code pulses after they pass through the communication line 13, representing, for example, a highway for parallel transmission of the sensor address code generated by the encoder 5. The generator 9 generates highly frequency-stable pulses that pass through KONiMyTaTOp 10 to counter 11 when there is no signal at the output of the element OR 7. If there is a signal at the output of the element OR 7, the switch passes this signal to the control input of the element 12 to record the state of the counter 11 in the corresponding output field one register 8.

5 The device operates as follows.

The voltage from the outputs of the analog sensors is continuously applied through the inputs 17 of the device to the inputs of the corresponding nodes 1 and null organs 3. In accordance with the prescribed law, node 1 outputs a command pulse to the inputs of the generator 2 and the first input of the driver 4. The generator 2 turns on operation and generates a voltage varying according to a given law, applied to the second input of the zero-organ 3. Shaper 4 converts the incoming pulse into a signal of a given duration required for normal operation of the device.

Then this generated pulse arrives. To the corresponding input of the encoder 5, which on its basis forms the message code containing

5 address from the sensor for which the analog-to-discrete voltage conversion began. From the output of the encoder 5, on communication line 13, the message code is fed to node 6, in which the bit d-,

The Q pulses of the message code are reduced to the form required for further operation of the device.

Next, the message code goes to the inputs of the element OR 7 and to the inputs of the flip-flops of the output register 8 fields of the sensor address. The element OR 7 forms a single impulse emitted to. the input of the switch 10. To the other input of this switch a continuous series of t receives rectangular pulses from

0 output of the generator 9. If the pulse from the output of the element OR 7 is absent, then the pulses of the generator 9 are passed to the input of the counter 11, which records the device operation time. With

5 the arrival of a pulse from the output of the element OR 7, the switch 10 commutes this pulse to the elements and 12 simultaneously delaying the next pulse of the generator 9 by half the period. The pulse from the output of the element OR 7 ensures that the contents of the counter 11 are overwritten into the corresponding bits of the output register 8. At the same time, this pulse is fed to the control output 21 of the device, which is the signal for the computers upon receipt of the next message. After that, the switch returns to its original state, passes pulses from generator 9 to counter 11. The computer sends a command to device control input 20 and writes the contents of outgoing register 8 into its memory. In this way, the address of the sensor at which the analog-to-discrete conversion is started and the start time of the conversion will be written to the computer.

At the moment of coincidence in magnitude of the transformed and reference voltages at its inputs, the null organ 3 forms a single pulse arriving at the second input of the imager 4, from the output of which it goes further to the corresponding input of the encoder 5, which again forms the address of the sensor, which. is introduced into the VM along with time in the same way as described above. As a result, the addresses of the sensors and the start and end times of the conversion will be recorded in the computer memory.

In this example implementation of node 1, the voltage of each mating analog sensor is supplied to a scaling amplifier 16. These amplifiers in the required manner transform the voltage range of the mating analog sensor (it is amplified or attenuated by the appropriate number of times). Source 14 in the simplest case is a low-impedance potentiometer to which stabilized voltage is applied and from a slider the desired nominal voltage is taken. The voltage from the outputs of the scaling amplifier 16 and the source 14 is supplied to the corresponding inputs of the converter 15, which can be made in the form of a DC motor with a reducer on the output axis. The output axis of the gearbox has a cam closing contact of the interrupter with each turn of the output axis through 360 ° The contact of the chopper is included in the circuit of the generator of single pulses, for example, a resistive capacitive differentiating chain. Depending on the deviation of the voltage value at the output of the coupled analog sensor from the nominal value, the voltage difference increases.

on the electric motor and the angular velocity of rotation of its rotor increases, as a result of which the frequency of the pulses at the output of the converter 15 increases.

When a discrete sensor is triggered, a pulse of its triggering goes directly through input 18 to the corresponding driver 4. Next, the device operates in the same way as described.

Thus, the device provides the connection of both analog and pulse sensors for transmitting information about their states to the VM.

 the invention

0

A device for interfacing a computer with sensors, containing two groups of imgtulsov formers, outputs connected to an encoder with the output, which output is connected via a communication link to the input of the matching node, And, and the output register, the first group of information inputs which is connected to the outputs of the node matching and

0 corresponding to the inputs of the element OR, and the control input. are respectively the informational outputs and the control input of the device, the inputs of the first pulse shaper

5 groups are corresponding inputs of discrete sensors, characterized in that, in order to expand the functionality of the device by providing

0 the possibility of entering information from analog sensors, the nodes of the conversion start-up, reference voltage generators, null organs, time impulse generator, time pulse counter — and the first

5 input of each fop 1 ip pulse impulse of the second group is connected to the output of the corresponding conversion triggering unit, the input of which is connected to the corresponding analog input

0 sensors of the device and the first input of the corresponding null organ, and the output is through a reference voltage generator with the second input of the same null organ, the output connected to the second input of the same pulse generator of the second group, the output of the OR element is connected to the first input switch, the second input connected to the output of the generator of time pulses, and. the first

0 output - to the input of the time pulse counter, the output of which is connected to the information inputs of the AND elements of the group, the control inputs of which are connected to the second output of the switch

five

And control output, devices, and outputs - with the second group of information inputs of the output register.

Sources of information taken into account in the examination

1. USSR author's certificate 371574, cl. G About F 3/04, 1970.

2. USSR author's certificate for application no. 2546222 / 18-24, cl. G About F 3/04, 1977 (prototype),

Claims (1)

Claim A device for interfacing a computer with sensors, containing two groups of imDulse drivers, outputs connected to the corresponding inputs of the encoder, the output of which is connected through the communication line to the input of the matching node, a switch, a group of AND elements, and an output register, the first group of information inputs of which are connected to the outputs of the matching node and the corresponding inputs of the OR element, and the outputs and the control input. are respectively the information outputs and the control input of the device, the inputs are formed pulse generators of the first group are the corresponding inputs of discrete sensors, characterized in that, in order to expand the functionality of the device by providing the ability to enter information from analog sensors, conversion start nodes, reference voltage generators, zero-elements, time pulse generator are introduced into it, counter of temporary pulses, and the first input of each pulse shaper of the second group is connected to the output of the corresponding conversion start node, the input of which is single with the corresponding input of the device’s analog sensors and the first input of the corresponding zero-organ, and the output is through the reference voltage generator with the second input of the same zero-organ, the output connected to the second input of the same pulse former of the second group, the output of the OR element is connected to the first input of the switch, the second input connected to the output of the time pulse generator, a. the first output is to the input of the time pulse counter, the output of which is connected to the information inputs of elements AND groups, the control inputs of which are connected to the second output of the switch and the control output, devices, and the outputs to the second group of information inputs of the output register.