SU934525A1 - Device for transmitting telemetric information - Google Patents

Description

I

The invention relates to telemetry and can be used in telemetry information acquisition systems, as well as for communicating peripheral devices with computers.

A device is known for outputting to the communication line signals about the state of monitored objects and used as peripheral sealing devices, containing signal inputs, blocks of receiving synphating signals and synchronization signals, pulse distributor, register, decoders, buffer storage unit, forms 1 ; code controllers, controlled and uncontrolled gates, output devices for interface with the line l In view of the limited size of the code send, the number served by one such device Telemetry sensors are limited. Issuing information to a line through one output interface reduces overall reliability. The design of the device differs in complexity and a large number of elements, which limits its use in telemetry systems intended for installation on moving objects.

The closest in technical essence to the present invention is a device for transmitting information containing a switch of input signals, the information inputs of which are connected to the outputs of telemetry sensors, the inputs of the control pulse distributor are connected respectively to the sync pulse bus and the frame pulse bus, the outputs of the control pulse distributor are connected to the control inputs of the switch input signals, blocks agree-. Connecting to the output bus and analog-to-digital converter 1.2,

A disadvantage of the known device is the low reliability of information transmission, due to the fact that as a result of the failure of any switch key or information bus line, information from a group of telemetry sensors transmitted along a failed line connected to the failed key is completely lost and cannot be restored. At the same time, an error due to a line failure or keys connected to it depends on the line number in the bus and can reach 100. The purpose of the invention is to increase the reliability of information transmission from primary telemetry sensors. This goal is achieved by the fact that in a device for transmitting telemetry information containing a switch of input signals, whose information inputs are connected to the outputs of telemetry sensors, the inputs of the pulse distributor are connected respectively to the sync pulse bus and the frame pulse bus, the outputs of the pulse distributor controls are connected to the control pulses the input switchboard, and the output bus matching unit, the second switchboard and the frame pulse counter, the count the first input of which is connected to the bus frame pulse, outputs - to the second switch control inputs, data inputs are connected to outputs of the first switch, the second switch outputs are connected to inputs of the respective blocks .soglasovani output bus. The drawing shows the functional diagram of the device. The device contains a switch 1 input signals formed by multiplexers, a switch 2 formed by VI multiplexers, blocks 3 matching with the output bus, a distributor k control pulses of the first switch, a counter 5 frame pulses, digital information inputs 6 of the first switch, inputs and. 7 controls the first and second switches, respectively, the bus 8 frame pulses, the bus 9 clock pulses, the outputs 10 of the matching unit with the output bus, the output bus 11. The inputs 6 of the switch 1 are connected to telemetry sensors (not shown) or bits of the output analog codes -digital converters. The outputs of the multiplexers of the switch 1 are connected to the information inputs of the switch 2. The outputs of the multiplexers of the switch 2 are connected to the inputs of the corresponding matching units 3. Sync pulses from the central telemetry system arrive at one input of the distributor via the clock 9 of the synchronization pulses, and frame pulses go to the other input of the bus 8 frame pulses, which also arrive at the counting input of the counter 5. The outputs of the distributor are connected to the switch 7 inputs of the switches. The outputs of the counter 5 are connected to the inputs 1 of the control of the switch 2. The device operates as follows. The first frame pulse is recorded in counter 5 and sets the distributor 4 to the initial state. On the first clock pulse of the first frame, the distributor k is recorded 1 and the outputs 10 of the matching unit 3 are set to signals 1, t + 1, 2t + 1, ..., m (n - 1) + 1 digital information inputs 6 of switch 1. By to the second clock pulse, the code at the output of the distributor 4 is increased by 1 and signals with 2, m + 2, ..., m (n - 1) + 2 inputs are fed into the output bus. Similarly, the device operates on 3,4, ..., t-th sync-mpule g-j Sov. Then, the bus 8 receives the second frame pulse, through which the distributor 4 is reset, and the output code of the counter 5 is incremented by 1. At the same time, the output of the first multiplexer of switch 1 is connected to the second multiplexer of the second switch 2, the output of the second multivibrator 1 through the third multiplexer of the switch 2 to the matching unit, etc. The output of the nth multiplexer of switch 1 is connected to matching unit 3. via the corresponding multiplexer of the second switch. At the first clock pulse of the second frame, the signal tj (n-1) + 1 appears at the output 10 of the matching block 3, and at the output 10 of the block 3fl. matching - t, at the output of the block 3 1, etc. On the second clock pulse of the second frame, 59 n-1) +2 appears at the output 10 of the block Zr1 of matching, at the output of block 3, a signal t, at the output of block 3 a signal, etc. After the counter is filled with the pulse pulses, it returns to its original state and the work cycle resumes. Thus, after each frame pulse, a shift of the previous code– occurs. each matching unit serves in turn all inputs 6 of switch 1. To restore the original information in the receiver, at the beginning of each frame, the information should be shifted cyclically in the opposite direction to N-bits, where N is current frame number; C - the capacity of the counter 5; Gd-T is intact part of the draw. 1- with J If one of the matching 3 blocks or switch 2 fails, information lost in one frame will be transmitted via n-1 healthy matching circuits or multiplexers in (n-1) frames. This makes it possible to detect the faulty matching unit 3 or multiplexer of switch 2, the type of failure, and restore the original message. However, in the case of transmission

using the analog values of analog signals using probabilistic methods, it is possible to reconstruct the transmitted number up to the least significant bit. Since the matching units typically have a failure rate 2 orders of magnitude higher than microelectronic counters and multiplexers, the introduction of a second switch and

the outputs of the second switch are connected to the inputs of the corresponding matching blocks with the output bus.

Sources of information taken into account in the examination

1. USSR author's certificate fP k7B3k7. cl. Q08 C 19/28, 19752. The Federal Republic of Germany patent No. 250 02,

Claims (1)

cl. b08 From 15/06, published. 1976- (prototype). 5 of the frame pulse counter, equivalent to (n-1) -fold reservation of each matching circuit, allows to increase the reliability of information transfer. An apparatus for transmitting telemetry information, containing an input signal switch, whose information inputs are connected to telemetry sensor outputs, control pulse distributor inputs are connected to a clock bus and frame pulse buses, respectively, control pulse distributor outputs are connected to control inputs of an input switch, and output bus matching blocks, characterized in that, in order to increase the reliability of the device, Torah switch and frame pulse counter whose count input poklyuchen bus frame pulse, and outputs - to the second switch control inputs, data inputs which soedines first switch outputs.