SU763931A1 - Device for transmitting data from moving objects - Google Patents

Description

one

The invention relates to devices for transmitting information from moving objects and is intended for use in automated systems for operational control and monitoring in construction.

A device is known for transmitting discrete information from moving objects and providing two-way Q telephone communication 1. A discrete information transfer node contains a communication channel, a control unit, a generator clock distributor, a storage medium that allows to transmit four characters of the number

MSH1SHNY.

Disadvantages of the device include low noise immunity and low data transmission speed in the field of interference, imperfection of the control scheme (at parity), the requirement to stop transport over the communication channel coverage areas, transfer of fixed information of small volume. 25

The closest in technical essence is a device for telecontrol and recording the work of moving objects, in which a communication channel, a control unit can be distinguished, carry

whether the primary information from the sensors and the block coding and formation of control signals 2.

A disadvantage of the known device is that it provides for issuing only variable information and does not transmit the signs of the beginning and end of information, as a result of which all information is repeated when a part of it is distorted due to interference. It can be shown that the average transmission time of reliable information consisting of n bits is equal to

where p is the probability of distortion of one

bit of information; t; - transmission time of one bit.

As a result, minor changes in the likelihood of disturbing factors strongly influence the duration of information transfer. This limits the amount of information transmitted.

The aim of the invention is to improve the speed of the device in terms of interference.

The goal is achieved by the fact that counters, decoders, a fixed information carrier, an analysis unit, two OR elements and a signal unit, the first are entered into a device for transmitting information containing a communication channel, a variable information carrier, a control unit and a coding and block generation of control signals. and the second outputs of the control unit are connected respectively to the first and second inputs of the first counter and the first element OR, the third and fourth outputs of the control unit are connected respectively to the third input of the first the OR element and with the first inputs of the second OR element and the second counter, the output of the first OR element is connected to the second inputs of the second OR element and the second counter, the fifth and sixth outputs of the control unit. connected to the third input of the OR element and to the first input of the third counter, the second input of which is connected to the output of the second element OR, the counter outputs are connected to the inputs of the corresponding decoders, the first outputs of which are connected respectively to the first, second and third inputs of the control unit, the second and third outputs the first decoder is connected to the input of the carrier of variable information and to the first input of the carrier of fixed information; the second output of the second decoder is connected to the second input of the carrier of fixed information The second input is connected to the output of the variable information carrier, the second output of the third decoder is connected to the third inputs of the fixed information carrier and the encoding and generation of control signals, the output of which is connected to the first input of the channel. connection, the second input of which is connected to the output of the carrier of fixed information, and the output of the channel, communication is connected through the analysis unit to the corresponding input of the control unit and, a seventh output is connected to the input signal block.

The drawing shows a block diagram of the device information transfer.

The information transfer device contains a communication channel 1 ,, analysis unit 2, control unit 3, the first counter 4 (for selecting media elements — layers), the second counter 5 (for selecting word-character elements), the third counter 6 (for sampling character elements bits). the first element OR 7, the second element OR 8, the counters correspond to the first decoder 9, the second decoder 10, the third decoder 11, the node 12 storage media, the variable information carrier 13, the carrier 14 fixed information

This unit, the unit 15 for encoding and shaping the control signals, the signal unit 16, the outputs of the control unit 7-22 (first to sixth, respectively), correspond to the outputs of de-diffractors 23, 24 and 25.

The coded signals of the information receiving point go through channel CI and 1 to analysis unit 2, where they are decoded and transmitted to control unit 3, which, when receiving information polling signals, before starting the first signal from output 17, sets state 0 to first counter 4 , and the counters 5, b are set to the state O by the output signals of the elements OR 7 and 8 connected to the inputs by setting zero counters. From the point of reception of information, via the communication link, the analysis and control unit, other signals can also be transmitted to the signal unit 16, for example, commands for the driver.

 Depending on the current state of the first counter 4, the decoder 9 selects the storage medium from the node ° 12. The decoders 10 and 11 sample the elements of the word and character depending on the state of the counters 5 and 6, Information from the variable information carrier 13 enters communication channel 1 only after passing through the block 15 for encoding and generating control signals, and from the carrier block 14 fixed information - directly, since it is already encoded. The signals from the output 22 of the control unit 3 are added one by one to the third counter 6 and the next binary bits of the character from the selected carrier are sent to the communication channel. The output 25 of the decoder 11 transmits to the control unit 3 a signal on the completion of the transmission of a symbol, after which the signal from the output 20 of the control unit 3 adds one to the counter (to select the next word element) and through the element OR 8 sets the third counter 6 to the state O.

. The output 24 of the decoder 10 transmits to the control unit 3 a signal about the end-: Research institute for word transmission, after which the second output signal 18 of the control unit 3 adds one to the first counter .4 and is set to state O and counters 5 and 6 through the elements OR 7 and 8. Signals from the output. 19 of the control unit. 3. installation in O counters 5 and 6.

The appearance of the last media address at output 23 of the development unit 3 stops the transmission of information. In the fixed information carrier there is also information for control.

Wrongly received information at the point of reception, generates a re-poll signal code that passes

through the channel {; in 1), is decoded in analysis unit 2 and causes a signal at the output 21 of the control unit, which sets the state 0 to the third counter 6 by means of the element OR 8. The states of the counters 4 and 5 do not change, so the transmission starts again bits only distorted character.

Direct correction of only the distorted part of the information increases the speed. And the amount of reliably transmitted information is subject to interference. It can be shown that the transmission time is shortened in

H

(-l-pHI- 4:

where k is the number of transmitted characters; distortion probability of one

bit;

n is the number of transmitted bits. The given formula allows one to make an optimal choice of the volume of the symbol and word bits with known values of the probability of their distortion.

The economic efficiency of using the proposed device is determined by its technical advantages indicated above.

Claims (2)

Invention Formula A device for transmitting information from mobile objects, containing a communication channel, a variable information carrier, a control unit and a coding and block generation of control signals, characterized in that, in order to improve the device performance under impulse noise conditions, the decoders, fixed information carrier, analysis unit, two OR elements and a signal unit, the first and second outputs of the control unit are respectively connected with the first and second inputs of the first counter to the first And element LIE, the third and fourth outputs of the control unit are connected respectively to the third input of the first OR element and to the first inputs of the second OR element and the second counter, the output of the first OR element is connected to the second inputs of the second OR element and the second counter, the fifth and sixth outputs of the control unit are connected with the third input of the second OR element and with the first input of the third counter, the second input of which is connected to the output of the second OR element, the counter outputs are connected to the inputs of the corresponding decoders, the first outputs of which ryh 5 are connected respectively to the first, second and third inputs of the control unit; the second and third outputs of the first decoder are connected to the input of the variable information carrier and to 0 to the first input of the carrier of fixed information, the second output of the second decoder is connected to the second input of the carrier of fixed information and to the first input of the block for encoding and generating control signals, 5 the second input of which is connected to the carrier of variable information, the second output of the third decoder. connected to the third inputs of the carrier of fixed information and the block for coding and generating control signals, the output of which is connected to the first input of the communication channel, the second input of which is connected to the output of the carrier of fixed information, and 5, the output of the communication channel is connected via an analysis unit to the corresponding input of the control unit, the seventh output of which is connected to the input of the signal unit. 0 Sources of information taken into account in the examination: 1. Technical description of the device of a mobile unit, T.O. Ha 2.009.009, Omsk, 1972. 2. Copyright certificate 5 478434, cl. a 07 C 5/00, 1975 (prototype).