SU766042A1 - Device for interrogation of information sensors - Google Patents

Description

The invention relates to radio engineering and can be used, in particular, in telemetry. A device for polling information sensors is known, which contains a pulse generator, the output of which is connected to the first input of the counter through the output element, the output of which is connected to the first inputs of shift registers directly, and through the reset pulse shaper to the input of the counter, the third input of the shift controller and the inputs of shift registers together, the outputs of the corresponding shift register are connected to the control & key inputs of the keys, the information inputs are connected to the outputs of the information sensors, and the outputs of the keys - with a communication line, and a reset pulse M is fed to the third input of the counter. However, the known device differs from the complexity due to the large number of ptipoca nodes. The aim of the invention is to simplify the device by reducing the number of polling nodes. For this purpose, switches and start-up switches are entered into the device for interrogating information sensors, and through its first shift register it is connected to the switch inputs, the outputs of which are connected to the additional counter inputs, while the inputs are blr-. Startup is connected respectively to the output of the pulse generator and the third input of the counter, which is connected to the additional input of the delay element. The drawing shows a structural electrical circuit of the proposed device. A device for interrogating information sensors comprises a pulse generator 1, a delay element 2, a counter 3, shift registers 4 and 5, start-up Q Q, switches 7, a reset pulse shaper 8, keys 9, information 3766

10 sensors, line 11, to bus 12 connected to the third

the input of the counter 3, the pulse is reset.

The device works as follows.

The polling cycle starts by starting the pulse generator 1. The pulses arrive at the delay element 2 and the start-up unit 6. The delay element 2 does not transmit the first pulse from the generator 1 going to the counter 3. The start-up unit 6, on the contrary, is designed to supply the first pulse to the input of the first shift register 4. When the first pulse arrives in the first register bit 4, a signal appears that is fed to the input of the switch 7 connected to the first bit. Switch 7 has a number of outputs equal to the number of bits

counter 3 to be recalculated. Having skipped the first pulse, the startup unit 6 closes before the next polling cycle, as it is reset to the initial state by a reset pulse from the bus 12. Starting the second, counter 3 starts counting the pulses, the number of which is determined by its setting from the first register 4 through the switch 7. Simultaneously the first pulse starts the register 5 which connects the first interrogated information sensor 10, for the counter 3 starts the counting of pulses. After the end of the counting of the pulses recorded in the counter 3, at its output appears from the pulse, the incoming registers 4 and 5 and to the shaper 8 of the reset pulses, which sets the counter 3 to the initial state. Registers 4 and 5 go to the next

discharge The signal from the first register 4 from one of the bits is fed to a switch 7 of the same bit. The pulses from the output of the switch 7 act on the bit inputs of the counter 3 to adjust it to the account of a predetermined number of pulses. Register 5 connects the next information sensor 10 via key 9 to communication line 11. The polling cycle stops after counting pulses for the latter in the sequence diagram of sensor 10. Before the next polling cycle, the circuit is reset to the initial state by applying a reset pulse on bus 12.

Claims (1)

Invention Formula A device for polling information sensors, comprising a pulse generator, the output of which is connected via a delay element to the first input of the counter, the output of which is connected to the first inputs of shift registers directly, and through the reset pulse generator to the second input of the counter, the third input of which and the second inputs of shift registers are combined , at the same time, the drives of the corresponding shift register are connected to the control inputs of the keys, the information inputs of which are connected to the outputs of the information sensors, and the outputs The switches are connected to the communication line, and a reset pulse is applied to the third input of the counter, characterized in that, in order to simplify the device by reducing the number of polling nodes, switches and a startup unit are introduced, whose input through the first shift register is connected to the switch inputs, outputs which are connected to the additional inputs of the counter, while the inputs of the start-up block are connected respectively to the output of the pulse generator and the third input of the counter, which is connected to the additional input of the delay element. Sources of information taken into account during the examination 1. USSR author's certificate No. 650249, cl. H O4 Q 9/14, 1975 (prototype).