SU483694A1 - Receiver for telemetry - Google Patents

Description

The invention relates to the field of measurement technology, in particular, to the systems of transformation and transmission to the distance of the measurement results produced by the help of frequency sensors.

Receivers for telemetry in systems are known that contain a linear unit, a time-to-frequency converter, performed on a valve, a frequency divider, a counter, and a delay unit, which generates a trigger and a controlled frequency divider, a discrete receiver, a pulse generator, a time-pulse converter, and On the DC generator, the output of which is connected to the output of the key, the integrating capacitor and the input of the zero-organ, the output of the zero-organ is connected to the first input of the trigger, one output is the trigger It is connected to the key input, the other is connected to an analog receiver.

A disadvantage of the known device is low accuracy due to the use of a large number of analog transformations.

In the proposed device, this disadvantage is eliminated due to the fact that in it the output of the linear unit is connected to one of the inputs of the first valve, and through the delay unit to the counting input of the forming trigger, the first output of which is connected to the other input of the first valve and the second volts, the third valve and trigger, the second output of the forming trigger is connected to the first input of the second valve, the second input

which is connected to the first input of the third valve and the generator output 1pulso1 :. the output of the second valve is connected to the counting input of the counter through the frequency divider, the reset inputs of the frequency divider and the counter are connected to the output of the first valve, the output of the third valve is connected to the discrete receiver via the controlled frequency divider, and the outputs of the counter are connected to the corresponding control inputs of the controlled frequency divider and direct current generator.

Such connections in the receiving device circuit allow to obtain at the output of a discrete receiver a code of fixed frequency without

any analog transformations and, therefore, with higher accuracy than in known devices, and in addition, a pulse sequence with a frequency equal to the fixed frequency is obtained on the output of the controlled frequency divider, which may further expand the possibility of further signal conversion.

FIG. 1 shows a structural diagram.

receiving device for telesimerism; in fig. Figures 2 and 3 show the graphs of the signals for anchoring device operation. The proposed device contains a linear block V, a converter of 2 time intervals into a frequency, including valves 3-5, frequency divider 6, counter 7, delay unit S, forming trigger 9, controlled frequency divider 10, pulse generator}, discrete receiver 12, analog receiver 13, time-pulse converter 14, which includes a DC / 5 generator, an integrating capacitor 16, a zero-body 17, a trigger 18, and a switch 19. FIG. 2 and 3, the following designations are given: Ui - signals at the output of a linear block /; t / 2 - signals at the output of the delay unit 8; f / 3 - signals at the first output of the forming trigger 9; / 74 - signals at the second output of the forming trigger 9; Uf, - signals at the output of the valve 4, U - signals at the output of the controlled frequency divider 10; V - signals PA valve output 3; Us - signals at the input of the key 19; Jg is the voltage across the integrating capacitor 16; Uio - sigpaly at the input of the null organ 17; L / n signals at the input of the analog receiver 13. The device operates as follows. The transmitter alternately converts the frequency of each sensor into two measuring pulses, the interval between leading edges of which is t. These impulses through the communication line are pushed to the input of the linear unit /, from the output of which, in the form of voltage Ui, are pushed to the delay device -8, and then in the form of the signal f / 2 are passed to the forming trigger 9. In this case, the valve 4 turns out to be an open signal At a time t and through it, and then through a frequency divider -6 with a division factor equal to jVi, the counter 7 receives t / 5 signals from the reference pulse generator 11. A number is recorded in the counter. Go f, - /; where / o - the frequency of the pulses at the output of the generator / 7. The number of pulses yVc4 unread in counter 7 is transmitted to controlled frequency divider 10, the division factor of which is set to jVc. At the end of the time interval tx, the shaping trigger 9 is transferred to the second steady state, locking valve 4 and opening with a signal and valves 5 and 5. Valve 5 passes generator generator 11 pulses through a controlled frequency divider 10. The frequency of emulsions of bb at the output of the 1G divider is defined by the expression r fj, fo. And it can be measured by a discrete receiver 12, which uses a digital frequency meter or a frequency-code converter. The leading edge of the signal that terminates the 4- interval, the trigger / 5 is set to a position in which there is no voltage at its output associated with the key 19 (see Us). The key 19 is closed and the integrating capacitor begins to charge (Ug) with the current from the controlled DC generator 15 (s, the simplest case, this generator can be a set of conductivities). The output current of the generator 15 is determined by the state of the counter 7, i.e. / L, Ai D M, where 4; - the increment of the current at the output of the generator with increasing the number recorded in the counter 7, by one. The integrable capacitor 16 is charged before the voltage Uu, at which the null organ 17 is triggered, for a time: t / ,, c and, с /. /., where C is the capacitance of the integrating capacitor 16; K - coefficient of proportionality. The output signal of the zero-body 17 () returns the trigger 18 to the initial state and through the key 19 discharges the integrating capacitor 16. Thus, the duration t of the pulse at the output of the trigger / 5 is directly proportional to the frequency of the inverted sensor. When using an analog receiver 13, the latter converts the pulse duration and II at the output of the trigger 18 to the average current supplied by the corresponding output devices using any of the known methods. Subject of the Invention A telemetry receiver comprising a linear unit, a time-to-frequency converter, performed on a valve, a frequency divider, a counter and a delay unit, a forming trigger and a controlled frequency divider, a discrete receiver, a pulse generator, a time-pulse converter performed on the DC generator, the output of which is connected to the output of the key, the integrating capacitor and the input of the zero-organ, the output of the nullorgan is connected to the first input of the trigger, one output of the trigger The key is connected to the key input, the other is connected to an analog receiver, characterized in that, in order to improve the measurement accuracy, in the device, the output of the line unit is connected to one of the inputs of the first valve, and through the delay block to the counting

the input of the forming trigger, the first output of which is connected to the other input of the first valve and the second inputs of the third valve and the trigger, the second output of the forming trigger is connected to the first input of the second valve, the second input of which is connected to the first input of the third valve and the output of the pulse generator, the output of the second valve frequency divider connected to counting input

6

the counter, the reset inputs of the frequency divider and the counter are connected to the output of the first valve, the output of the third valve is connected to a discrete receiver via a controlled frequency divider, and the outputs of the counter are connected to the corresponding control inputs of a controlled frequency divider and a dc generator.

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