SU1456984A1 - Device for transmitting and receiving signals via power lines - Google Patents

Abstract

The invention is intended to automatically collect information about the state of a large number of mobile power consumers, dispersed in space and connected by an electrical network. The goal is to increase the information content of the device. The device contains a sensor, a high frequency generator, a high frequency filter, a pulse shaper, a memory element, an And element, an encoder, a counter, a switching element, and a high frequency filter, a high frequency generator, a pulse shaper, pulse generator, switching element, remote control, display unit, memory unit and counter. The receiving and transmitting sides are connected to the power line. The transmission of information from the controlled points to the receiver is carried out via the power conductors of the cable network. The accumulation and primary processing of information signals is essentially in an intermediate memory block. Processing, long-term storage and delivery. Information: the user can be carried out by a computer or microprocessor. 1 il. § SL

Description

. one

The invention relates to information-measuring systems intended for automatic collection of information from a large number of dispersed objects, for example, from portal cranes connected to one AC distribution network.

The aim of the invention is to increase the information content.

The drawing shows a block diagram of the device.

The diagram shows: transmitting point 1, receiving point 2, single-phase or three-phase power line 3. AC power transmission, to which all controlled objects are connected, 4 pulse shaper, which converts the sinusoidal voltages of the three-phase network (or single-phase) to square pulses, switching element 5, counter 6 pulses, memory block 7, high-frequency generator 8 transmitting high-frequency impulse messages into the network at specified intervals, pulse generator 9 with a duty cycle Q (n + 1), where n is the number Pass the items zadayu4 JV

Od co 00

liu

15

the beginning of each polling cycle, the high-frequency filter 10, which transmits high-frequency pulses of transmitting points from the power line, the driver of 11 pulses, the switching element 12, the counter 13, the encoder 14, which determines the address of this point and triggers The number of numbers at its input, the high-frequency filter 15, which is extracted from the power line, high-frequency impulse stations for starting the cycle of the receiving point, the high-frequency generator 16, element 17, memory element 18, Emer RS-trigger, allowing the sensor to store the information until the polling of a transmitting point datchik.19 controlled parameter, such as power consumption, which at least vschaet pulse rate, e.g., Watt hours of each unit 20 display q remote control 21.

The device collects information about the state of the monitored parameter in turn from each transmitting point dispersed over a large number of controlled objects. These items are polled in sharp sequence and each of them has its own time interval in the loop. Consequently, the number of the time interval in the polling cycle or, in other words, the number of the sending point in the row of respondents is its address. The address of the sending point is set by the encoder 14.

14569844

The switching element 12. Due to this, the inputs of the counters 6 and 13. Start to receive common-mode pulses from the formers 4 and 11.- The binary combination at the output of the counter 6 is the address of a specific memory cell 7 and is routed to it, and the same binary combination at the output the counter 13 is the address of a certain transmitting point and, if it coincides with the installation of the encoder 14, the output of the latter is a signal that is fed to one of the inputs of the And 17 element. To the second input of the And 1 7 element, a signal is output from the memory element 18 ti, if before the time elapsed since the previous survey, the input of the memory element 18 received a pulse from the sensor 19. When signals appear at both inputs of the AND 17 element, it triggers and turns on the high-frequency generator 16, the signal of which enters the line 3, is allocated by the high-pass filter of the receiving apparatus 10 and is fed to the information input of the memory block 7. In this case, one is added to the contents of the recalled memory cell. If, however, during the time elapsed since the previous survey, sensor 19 did not work, the output of memory element 18 would have no signal and generator 1-6 would not work, and the content of the called memory cell would remain unchanged.

When the next pulses arrive at the inputs of the counters 6 and 13, the combination changes at their outputs, and

20

25

thirty

35

The time intervals, respectively, 40, together with this, in the memory block 7, which call each of the transmitting points, are counted by counters 6 and 13, and the duration of these intervals is set by the formers 4 and 11 pulses operating synchronously with the network, and therefore, and with each other. Thus, the receiving and all transmitting points are synchronized with each other by the voltage of the network.

The following is a memory cell, and at the output of the encoder 14 of this item, the signal disappears, resulting in the termination of operation of the high-frequency generator 16 and clearing (resetting) of the memory element 18 (on the falling edge of the pulse).

When the number of pulses received at the counters 6 and 13 exceeds

The device operates as follows, and at the highest bit of the resolution of the sig .. m «w% lW j- f r% 5 / t. ntlOTtlMVM M

split |

When a pulse signal appears at the output of the generator 9, the switching element 5 opens and turns on

The system, which resets the counters and closes the switching elements 5 and 12, returns to the initial state. At the appearance of the next

i lljr f J WUJfXfrti tf 1 HL A ft, nCb-f

for the time of existence of the pulse of the gene-55 pulse from generator 9 the whole cycle

RATOR 8 high frequency. The entire cell of this generator is transmitted from the power line 3 by the high-frequency filter 15 and the open interrogation is repeated,

After a certain time, not exceeding the time of full filling of memory block 7, the next memory cell is called in memory block 7, and the output of the encoder 14 of this item disappears, resulting in the termination of operation of high-frequency generator 16 and clearing (resetting) the memory element 18 (at the trailing edge of the pulse).

When the number of pulses received at the counters 6 and 13 exceeds

n and on the highest bit of resolution on Wits sig .. m «w% lW j- f r% 5 / t. ntlOTtlMVM M

The system, which resets the counters and closes the switching elements 5 and 12, returns to the initial state. At the appearance of the next

pulse from generator 9 the whole cycle

polling is repeated,

After a certain time, not exceeding the time of complete filling of the memory block 7, the operator from the control panel 21 (or from the computer) is given a signal to read information from the memory block 7 and the address of the readable cell. By this command, the contents of said cell of memory block 7 are transmitted and displayed in display unit 20 (or are overwritten in computer memory), and the cell is cleared.

For the operation of the device, the following conditions are necessary: the maximum possible frequency of the pulses at the output of the sensor 19 must be less than the frequency of the generator of 9 pulses; the frequency of the pulses at the output of the generator 9 must be (n + l) or more times less than the frequency of the pulses at the outputs of the formers of 4 and 11 pulses.

Claims (1)

Invention Formula A device for transmitting and receiving signals via power lines, containing, at each transmitting point, a sensor, an encoder, a pulse shaper, a high frequency filter, the output of which is connected to the first input of the switching element, and the input is to the power line; frequency, pulse shaper, pulse generator, switching element, characterized in that, in order to increase the information content, a memory element, an And element, a high hour generator are introduced into it at each transmitting point Ota and counter sensor output is connected to the first input of the memory element, the output t 456984 which is connected to the first input of the element I, the output of which is connected to the second input of the memory element and through the high-frequency generator to the inputs of the high-frequency filter and pulse generator, the output of the latter is connected to the second input of the switching element whose output 10 is connected to the first input of the counter, the outputs of the counter are connected to the corresponding inputs of the encoder, the first output of the counter is connected to the third input of the switching element and its 15 second input, the output of the encoder is connected to the second input of the And element, at the receiving point - the control panel, unit indications, memory unit, high-frequency counter and generator, outputs. 20 of the control panel are connected to the corresponding inputs of the first group of the memory block, the output of which is connected to the input of the display unit, the inputs of the second group of the memory block are connected. 25 with the corresponding meter outputs, the first output of which is connected to The first input and the first input of the switching element, the output of which is connected to the second input of the counter, the output of the pulse generator is connected to the input of the high-frequency generator and the second input of the switch-. element, the third input is connected to the output of a pulse generator 35, whose input is combined with the input of a high-frequency filter and connected to an electric power line, the output of a high-frequency filter is connected to the input of a memory unit, the output of a high-frequency generator is connected to an input pulse former. Editor S.Pekar Compiled by E. Nizamutdino Tehred M. Hodannch. Proofreader N. Gunko Order 7490/48 Circulation 518 VNIIPI State Committee on Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow., Zh-35, Raushsk nab. 4/5 Subscription