SU905845A1 - Device for transmitting telemetry information - Google Patents

Description

(SM DEVICE FOR TRANSMITTING TELENETRIC INFORMATION

I

The invention relates to telemechanics and can be used in adaptive systems for collecting and transmitting information from controlled points to a control room.

It is known that increasing the capacity of the communication channel increases the efficiency of the telemechanics system.

A transmitting code-pulse device is known, which contains a switch, the inputs of which are connected to the output terminals of telecommunication sensors, the synchronization unit, the storage unit 1.

The disadvantage of the device is a large redundancy of information output to the communication channel.

A device for transmitting telemetry information is known, which contains a switch, the inputs of which are connected to the output terminals of telecommunication sensors, a synchronization unit (control unit), an operational

a storage device (RAM), a floating unit, a buffer storage device (RAM) and a key element, the first output of the synchronization unit (control unit) is connected to the address input of the operational memory and to the control input of the switch, the output of the key element is connected to the output of the device for transmission Informations 23.

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The drawback of the device lies in the low degree of compression of the information transmitted to the communication channel.

Closest to the present invention, there is a device for transmitting telometric information, containing a channel switch, the inputs of which are connected to the input terminals of telecommunication sensors, a synchronization unit (control unit), operational

20, a storage device, a decision unit, a buffer storage device, a control trigger and a key element, with the first output of control unit 39 connected to the address input of the random access memory and to the control input of the switch; one of the outputs of the decision block is connected to the control input the trigger, the output of which is connected to the input of the key element, the output of the key element is connected to the output of the information transmission device. The known device provides a reduction in the redundancy of information output to the communication channel, namely, it transmits to the channel only the necessary suit of the parameter code — the increment of the parameter signal in this channel as compared with the previous count, increasing the capacity of the channel. The teleinformation and the teleinformation sensor in the known device receive full information about the state of the monitored parameter. Consequently, at a sufficiently large polling frequency or in the case of a slowly varying process, when the monitored parameter varies slightly between polling cycles, the input channel of the TI transmission device is overloaded with redundant information, covering the entire range of the monitored parameter and has a limited bandwidth, and TI sensors should be designed for the whole range of the monitored parameter. The purpose of the invention is to reduce the redundancy of information transmitted by the device, i.e. increase the information content of the device. This goal is achieved by the fact that the device for transmitting telemetric information, containing a switch, whose information inputs are connected to the device inputs, is an abrasive input, with the first output of the control unit, the second output of which is connected to the address input of the operational memory block, decisive The impulse driver is inserted through the control trigger through the control trigger connected to the first input of the first key element, and the buffer block pas -1, the first output of which is connected to the first output of the device. In particular, the deviation sign maker, reversible counter, second, third, fourth and fifth key elements, the switch output is connected to the information input of the operational memory block, the output of which is connected to the first input of the second key element, the output of which is connected to the first input of the decision block, the second inputs of the second and third key elements are combined and connected to the second output of the control unit, the third and fourth outputs of which are connected respectively to the first input of the fourth key element and the second m input of the first key element, the output of which is connected to the second output of the device; output of the fourth key element is connected to the information input of the reversible counter; the element whose output is connected to the input of the pulse former, the first and second outputs of the pulse former are connected respectively to the first input of the fifth key element a and the counting input of the reversible counter, the output of which is connected to the second input of the fifth key element, the output of the fifth key element is connected to the first input of the buffer memory block, the second input of which is connected to the second input of the device, the second and third outputs of the buffer memory block are connected with the second inputs of the decision block and the fourth key element. The drawing shows a block diagram of the device for transmitting telemetry information. The device contains a switch 1, key elements 2-6, an operative memory block 7, a decisive block 8, a buffer memory block 3, a pulse shaper 10, a control block 11, a deflection mark shaper 12, a reversible counter 13, a control trigger. A device for transmitting telemetry information works as follows. At the inputs of the device with a given clock speed, information is received on the change of the lower bit of the monitored parameter of the TI sensors (not shown in the drawing). Sleep with

sensor information about the change of the lower bit of the monitored parameter (for example, the younger decade of the binary-decimal TI code) is sent to the switch channel 1 to connect the communication channels carrying information to the block 7 The control unit 11 calculated by the k switch switches control for a certain number of ticks defining the cycle of information transfer. In block 7, the serial low-order code is converted to parallel. After that, the control unit 11 sends a command to the input of the first key element 2 (for example, element I) and the information from the output of block 7 goes through the second key element 3 to the input of the decision block 8. The second input of the decision block 8 receives the information from block 9, which characterizes the value of the low bit TI in the previous survey cycle. Block 9 is designed to store the code of the current value of the parameter being monitored, which is initially entered into block 9 (when sensors are installed on the object) and changes accordingly with the low-order increment code of the parameter being monitored. Solving unit 8 compares the values of the monitored parameter received at both its j-oro and (j-l) -oro inputs, for example, by a difference criterion and analyzes the comparison results. At the same time, at the second output of the decision block 8, a signal is generated, which enters the input of the pulse shaper 10 through the third key element k, which is opened at the corresponding clock by the control block 11. At the output of the decision block 8, a signal is generated, which includes the deflection sign generator 12 and recording in it the sign of the sign of deviation. Signals from the second output of the imaging unit 10 of the pulses arrive at the counting input of the reversible counter 13, which the reversing counter 13 counts in the direction specified by the imaging unit 12 of the deviation sign. In addition, from the first output of the pulse driver 10, a signal is sent to the fifth key element 6 and the information recorded in the reversing counter 13 at each step of operation of the driver 10 is transferred to block 9.

Thus, the reversible counter 13 is filled until a low-order code is formed on the third output of block 9, equal to the code received in decision block 8 from block 7. If the code is equal, the code at the inputs of the decision block 8 (i.e. no mismatch) no signals are generated at its output, i.e. the code at the output of block 9 corresponds to the current value of the monitored parameter.

If the magnitude of the difference between the previously set TI value and the current TI value exceeds the previously set level (within the youngest decade), then the decision block

8 a signal is formed that sets the trigger to the state in which a signal appears at its output that unlocks key element 2. Starting from this moment, from the second output of the device, a signal is sent to the communication channel indicating that the increment of the TI value has exceeded the specified level. This signal coming

to the control room, is perceived as a request for polling this sensor. The dispatcher requests this sensor and the output value of the block 9 enters the output channel of the monitored parameter.

Block 9 is made on elements with non-destructive memory. After a break in the power supply at the first cycle of operation of the control information block 11 from the second output of the block

9 through key element 5 is entered into the reversible counter 13 and then the cycle of polling the sensors TI is repeated

in the order described.

Thus, the proposed device for transmitting teleinformation receives from the TI sensors information about changing only the lower bit and, using this information, forms the current value of the measured parameter. It unloads the device for transmitting telemetry information and increases its throughput.

Claims (3)

Invention Formula A device for transmitting telemet -. information containing the switch, the information inputs of which are connected to the inputs of the device. 7BO control input — with the first output of the control unit, the second output of which is connected to the address input of the operative memory unit, the decision unit, the first output of which is connected through the control trigger to the first input of the first key element, and the buffer unit, The first output of which is connected to the first output of the device, characterized in that, in order to increase the information content of the device, a pulse shaper, a deflection mark shaper, a reversible counter, second, third, fourth and fifth key are entered into it elements, switch output is connected to the information input of the operational memory block whose output is connected to the first input of the second key element, the output of which is connected to the first input of the decision block, the second inputs of the second and third key elements are combined and connected to the second output of the control unit, the third and the fourth outputs of which are connected respectively to the first input of the fourth key element and the second input of the first key element, the output of which is connected to the second output house of the device, output four The key element is connected to the information input of the reversible counter, the first output of the decision block is connected via the sign shaper, the deviation to the control input of the reversible counter, the second output to the second input of the third key element, the output of which is connected to the input of the pulse shaper, the first and second outputs pulse former are connected respectively to the first input of the fifth key element and the counting input of the reversible counter, the output of which is connected to the second input of the fifth key electric The output of the fifth key element is connected to the first input of the buffer memory block, the second input of which is connected to the second input of the device, the second and third outputs of the buffer memory block are connected to the second inputs of the decision block and the fourth key element. Sources of information taken into account in the examination 1.V Malov S. et al. Telemetry. M., 1975, p. 238-2 I. 2. USSR author's certificate number 32566, cl. G 08 C 19/28, 1973. 3. USSR author's certificate No. 68TS5E2, cl. 08 C 19/28, 1977 (prototype).