SU1269170A1 - Method and apparatus for transmission and reception of telemetering signals - Google Patents

Abstract

The invention relates to telemetry and can be used, for example, in well logging stations. The invention makes it possible to increase the noise immunity of signal transmission. The method consists in transmitting a sequence of short sync pulses from the control point to controlled

Description

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From points, from each controlled point, alternately during the time interval between reception of short cHtrxpoints, the address signal of the next controlled point, and then the information signals of the same point, are transmitted to the control point. At the control point, the received information signals are divided by information channels in accordance with their address signals. The device contains in step 1 of the control unit 2 power supply, filter 3 0 (choke), load element 4 (resistor), key 5, chroniser 6, the switch 7, the recorder 8, the communication line 9, and at each controlled point 10 - the trigger 11, the counter 12, the sensor 13, the sensor 14, the driver 15 pulses and the switch 16, performed on the decoder 17, block 18 keys, throttle 19, preliminary an amplifier 20, an input amplifier 21 comprising resistors 22-24, capacitor 25, transistor 26 and diode 27. 2 s., 1 hp f-ly, 3 ill.

The invention relates to telemetry and can be used, for example, in well logging stations.

The purpose of the invention is to improve the noise immunity of the transmission and reception of signals due to the additional transmission of the frequency of address signals before the transmission of information signals, as well as increasing the noise immunity of the device.

FIG. 1 shows a block diagram of the deviceJ in FIG. 2 is a functional diagram of the switch in FIG. 3 - diagrams for the operation of the device.

The method of transmitting and receiving telemetry signals is that the sequence is short: the sync pulses are transmitted from the control point to the controlled points. From each controlled point, alternately, at intervals of time between receiving short sync pulses, the address signal of the next controlled point and then the information signals of the same point are transmitted to the control point. The frequency of the address signals of different control points differ from each other. At the control point, the received information signals are divided into information channels according to their address signals.

A device for transmitting and receiving telemetry signals contains

(Fig. 1) at point 1 of control unit 2 power supply, filter 3 (choke), load element 4 (resistor), switch 5, chronizer 6, switch 7, recorder 8, link 9, and at each controlled item 10 - trigger 11, counter 12, sensor 13 (frequency measuring transducer) sensor 14 (frequency address generator), pulse shaper 15 and switch 16J performed on decoder 17, key block 18, throttle 19, preamplifier 20, amplifier in-set amplifier 21, containing

resistors 22-24, capacitor 25 and transistor 26, and diode 27.

Switch 7 contains (Fig. 2) voltage converter 28 (impulse transformer), amplifier

29, a pulse shaper 30, a counter 31, a decoder 32, a pulse distributor 33, performed on triggers 34-36 and a pulse frequency divider 37, and digital-to-analog converters 38-42. The device works as follows

At the start of operation, when the power supply unit 2 is turned on, the formers 15 produce pulses, setting the counters 12 of the control points 10 to the initial (zero) state. The chronizer 6 generates sync pulses (plot 31, fig 3) controlling

Claims (1)

with key 5, key 5 is closed for a short time and power line 9 from block 2 receives powerful pulses against the background of a voltage error, from which triggers 11 control points 10 are triggered, counter 12 counts the number of pulses at the output of trigger 11, decoder 17 opens the keys of block 18, alternately connecting the frequency address generators 14 and frequency measuring transducers 13 at various controlled points 10, the frequency signals of the monitored points 10 (diagrams E2, EZ, E4, fig 3) arrive through link 9 (diagrams 35, E6) at the entrance to the comm 7, and after passing through the amplifier 29, the pulse shaper 30, are counted by the counter 31 (FIG. 2). According to the received frequency of the address signal, the encoder 32 generates a signal at one of its outputs that sets the corresponding trigger 34 of the distributor 33 to one so A single signal from the output of the pulse distributor 33 permits operation of the corresponding digital-analogue converters 38-42, which convert the information signals of the measuring converters 13 into analog form, following the address signals of the generators 14 of each controlled point 10, C outputs of the 3842 converters are fed to the recorder 8, the Pulse transformer 28 implies the envelope of the pulse signal of the sensor 13 by applying it to the input of converter 39 (pulse width to the amplitude of the analog signal), The invention allows one to transfer the power supply voltage controlled by 1X points, commands to switch 16 switches and information from controlled points 10 to control point 1, through a cyclical interrogation of points 10, during a short power supply of block 2, the meters 12 are set to the initial state. Received from various monitored points 10, the information of the sensors 13 is distributed over the channels in accordance with the frequency addresses of the oscillators 14. These features increase the noise immunity of the proposed device in comparison with the known. 704 Claim 1, a method for transmitting and receiving telemetric signals, implies that a sequence of short clock pulses are transmitted from a control point to control key points, from each test point, alternately in time intervals between receiving a short clock pulse, information signals are sent to the control point, about ton This is because, in order to increase the noise immunity of transmitting and receiving signals, from each monitored point alternately during the time intervals between the reception of short sync pulses before transmitting information signals transmit to the control point an address signal whose frequency is different for different controlled points, the amplitude of the address and information signals is less than the amplitude of the short sync pulses, 2, Device for. transmitting and receiving telemetry signals containing a chronizer at the control point, the first output of which is connected to the first control input of the switch, the switch outputs connected to the corresponding inputs of the recorder, the power supply, at each controlled point the trigger, the output of which is connected to the counting input of the counter the outputs of which and the outputs of the counter are connected respectively to the information and address inputs of the switch, the switch outputs of the monitored points and the information input switch A control point is connected to a communication line, characterized in that, in order to increase the device noise immunity, a filter, a key and a load element are entered at the control point, the output of the power supply unit is connected through a filter to the information inputs of the key and switch, the output key is connected through a load the element with the zero potential bus, the second and third outputs of the chroniser are connected respectively with the second control input of the switch and with the control input of the key, a driver is inserted at each controlled point l pulses, the combined inputs of the pulse generator and S trigger connected to the output of the switch, the output of the pulse generator connected to the input of the installation in the zero meter. 3, the apparatus of claim 2, wherein the control point switch comprises an amplifier, a pulse shaper, a counter, a decoder, a pulse distributor, a voltage converter and analog amplifiers, the amplifier output is connected through the pulse shaper to the counter input of the counter, the outputs of which are connected with the corresponding inputs of the decoder and information inputs of the first digital-analogue tpi / fi eleven t I I 1u 1ShGp and L / VWl / l M evil X )one 13 1c fairies 706 with a mapper, the decoder outputs are connected to the corresponding first inputs of the pulse distributor, the outputs of which are connected to the control inputs of the corresponding first and second digital-to-analog converters, the outputs of the voltage converter are connected to the corresponding information inputs of the second digital-to-analog converters, the combined inputs of the voltage converter and the voltage converter, setting the counter to zero and the second input of the pulse distributor are respectively informational, first m and second switch inputs of the gate, the outputs of digital to analog preobrazova1teley are outputs of the switch.