SU798947A2 - Telemetering system adaptive switching device - Google Patents

Description

The invention relates to telemetry and can be applied in the body of mechanics, long-distance communications, in automatic control systems. But the main author.St. No. 590798 is known for the adaptive switch of the telemetering system, which contains 3 each kanesh sensor, the output of which is connected to the converter input of the approximation error and the key / output of which is combined with the switch outputs of other channels and connected to the input of the analog-digital converter, the output of the converter of the approximation error of each channel with the corresponding input of the maximum signal detector, the outputs of the analogue-digital transducer are connected to the first inputs of the reader, whose output is The device is connected to the outputs of the counter and inputs of the decoder, the outputs of which are connected to the first input of the AND element and the control input of the key in each channel, the output of which is connected to the control input of the approximation error converter, the clock generator pulses, the output of which is connected through the additional element I to the counter input, the second input of the additional element I connected to the output of the trigger, the second output of which is connected to the second inputs of the elements I of all channels the trigger inputs are connected, respectively, to the control output of the readout unit and to the output of the comparison unit, and additional keys in each canape, the handles are connected to the outputs of the approximation error transducers, and the outputs are combined and connected to the first Bxofly comparison unit, the second input of which connected to the output of the detector 1. The disadvantage of the device is that with a high activity of a large number of input signals, the switch becomes ineffective due to the need to transmit along with the parameter code of the address code. For example, the transfer of all parameters in one Poll Cycle along with the addresses is less rational than transmitting them without addresses; SA with a marker pulse. Data transmission without addressing each channel increases speed

adaptive switch and reduces approximation errors.

The purpose of the invention is to increase the speed and accuracy of the adaptive switch of the telemetering system.

This goal is achieved by the fact that ITO has entered an adder, a threshold element, a second trigger, a second, third and fourth element I into the known adaptive switch; approximation error transducer outputs are connected to the corresponding adder inputs, the output of which is connected to the threshold element inputs, the first inputs of the second and third elements And, the second inputs of which are connected to the last output of the decoder, and the outputs - with the inputs of the second trigger, the output of the second trigger connection n with the input of the clock generator, the installation input of the first trigger, the control input of the read unit and the first input of the fourth element I, the output of the clock generator connected to the second input of the fourth element I, the output of which is connected to the trigger input of the analog-digital converter.

The drawing shows a structural diagram of an adaptive co-switch.

The adaptive telemetering switchboard contains in each channel sensors 1, which serve for pre-. formation of object parameters into an electric unified signal converters 2 approximation errors, which are used to generate a voltage proportional to the approximation error, keys 3, 4, which serve to transmit the output signal of sensors 1 and converters

2, and elements of And 5, intended for the foop into the signal of the reset of the transducers 2 and the moment of reference. Kot iyTaTOp also contains a detector

b maximum signal designed to detect the highest output voltage from all converters 2, comparison block 7, used to determine the location (address) of finding the highest voltage from all converters 2, decoder 8 and counter 9, which are used for sequential polling of keys

3.4, AND 10, a clock pulse generator 11 and a first trigger 12 for controlling the operation of the counter 9, a read block 13 pre-assigned to convert a parallel address code from the counter

9 and the parameter from the analog-digital converter 14 to serial and transfer it to the output of the switch. The switch also contains an adder 15, a threshold element 16, a second 17, a third 18 and a fourth 19 elements And, and a second trigger 20, which serve to switch the switch from address transmission to unaddressed one when the total error of approximation of a certain value is reached.

The device works as follows.

Upon completion of the readout of the previous reading, the reading unit 13 through the trigger 12 outputs a signal to the element 10, permits the passage of pulses from the generator 11 to the counter 9. Using the decoder 8, keys 3 and 4 are alternately opened, and one of the inputs of the comparison unit 7 is connected converters 2, proportional to the approximation error. To the second input of the comparator unit, the highest voltage from all converters 2 produced by the detector is connected.

6max signal. If the voltage values coincide at the inputs of block 7, i.e. when finding the channel with the greatest error, block

7 through the trigger 12, the signal to the element And 10, which prohibits the pulse from the generator 11 to the counter 9, passes. The counter 9 and the decoder 8 stop on that channel, the approximation error of which is the greatest, starts the analog-to-digital converter 14 and the analog signal

from the selected sensor is converted into a code and after transforming the parallel parameter code and address. to the serial reading unit transmits information to the communication channel.

This happens as long as the activity of the input signals is relatively low and the address transfer is effective. At the same time, the voltage proportional to the total approximation error, at the output of the adder 15, is left below the threshold of the threshold element 16, and a zero signal remains at the output of the second flip-flop 20. With a certain activity of the input signals, the voltage at the output of the adder 15 reaches the response threshold of the element 16 and through the element 17 when the decoder 8 of the last bus reaches the trigger 20 is transferred to the second state so that a single signal appears on its output. This signal reduces the frequency of the generator pulses 11, turns off: (the bits of the address code in read block 13 gates AND 19 and locks trigger 12 so that the signal from block 7 on trigger 12 does not affect. Starting the analog-digital converter 14 in In this case, it is carried out through the element AND 19 by the leading edge of the pulse of the generator 11. Before the start of the unaddressed transmission, the readout block 13 of the scientific research institute generates a common marker pulse. The non-transmitted transmission lasts one cycle, after which the switch can go to Clear mode of operation (element 18 will work), or continue the non-address transmission.

The boundary value of the compression ratio at which one should first go to the non-address transmission can be found from the equality of the signal volume in the address and non-address transmissions, namely

N

. (5, f) - Meo (; ti,

where N is the number of channels of the switch, M is the number of quantization levels of signal-Ks, the compression ratio of the samples. From this expression, the boundary value of the compression ratio. . ,

with K KQ, address transmission is effective, and, in addition, K, is addressless.

Thus, with high activity of input signals, the speed and accuracy of the proposed adaptive switch of the telemetering system with simultaneous activity of all input signals and the equality of the number of bits of the atrium code and the parameter speed

is doubled, and the approximation error is halved.

Claims (1)

1. USSR author's certificate 5.90798, c. 08 C 15/06, 1978 (prototype).