SU1406505A1 - Device for measuring deviation of signals of several frequencies from mean value - Google Patents

Abstract

SUBSTANCE: device for measuring the deviation of several frequency signals from the average value contains olor generator 1, counter 3, reverse counter 6, controlled divider 2 xiacTOTbi, multiplexers 4.5, shapers 8.9 short pulses, register 7, input sensors 10.1 Yu.n. frequency. In order to fully automate measurements, the reference generator 1 can be made controlled by a trigger and an AND element. The device is simple in design and has enhanced functionality, 2 il.,

Description

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The invention relates to electrical measurements and can be used to measure the deviation of the mean values of several near frequencies from the mean value, in particular for measuring signals from several frequency sensors having a systematic frequency drift in one direction. Invention — Enhanced Functionality and Simplification of the Device

Fig, I shows a functional diagram of the device; 2 shows timing diagrams for the operation of the device.

The device contains reference oscillator 1, controlled frequency divider 2, counter 3, first 4 and second 5 multiplexers, reversible counter 6 ,. Register 7, the first 8 and second 9 shapers of short pulses and input sensors 10.1 - 10 n frequency.

The output of the alternator 1 of the generator 1 is connected to the input of the controlled splitter 2 frequency and the input of the counter 3, the lower bits of which are connected to the control inputs of the first 4 and second 5 multiplexers, the information outputs of which are respectively connected to the summing and subtracting inputs of the reverse counter 6, infor - the operational outputs of which are connected | with the corresponding inputs of the register 1 f control. The input of WHICH is connected with the input of the first shaper of 8 short pulses, the input of the reset of the counter 3 and the output of the second shaper of 9 short pulses, the input of jcoToporo is connected to the gate inputs of the first 4 and second 5 of the Multiplexer and the output of the high bit of the counter 3, the output of the first shaper 8 short pulses are connected to the input Reset reversibly of counter B, the output of the controlled divider 2 is connected to the even inputs of the first multiplexer 4, and the outputs of the input sensors 10.1-10. П are connected to the corresponding odd inputs of the second multiplexer 5, while the outputs of register 7 are the outputs of the device.

. The device works as follows

The frequency signal from the output of the reference generator 1 is fed to the counter 3, which changes its state, controls the first 4 and second 5 multi-plexers, which periodically connect the measured frequency signals of the input sensors 10.1 - 10.p with equal time intervals to the counting inputs of a reversible counter 6 o With the help of a controlled divider 2, the frequencies of the input pulse signals and the frequency of the signal supplied to the even inputs of the first multiplexer 4 are set sufficiently close, therefore at the output of the reversing counter 6 In A measurement is formed with a numeric equivalent equal to the total change in the frequency of the signals, which is transmitted to register 7. Measurement time determines the capacity of counter 3 and is selected to reduce the error equal to an even number of low-order bits of the same counter 3. After the selected measurement time has passed, the most significant bit the counter 3 changes its state, the counting stops, the counter 3 with the help of the second shaper 9 short pulses is set to the idle state. The information accumulated in the reversible counter 6 is rewritten into register 7, after which the reversible counter 6 is set to the initial state and the device is ready to count the subsequent frequency changes. To fully automate measurements, the reference oscillator 1 can be made controlled by a trigger and an AND element.

Claims (1)

Invention Formula A device for measuring the deviation of signals of several frequencies from the average value, containing a reference oscillator, a counter and a reversible counter, input frequency sensors ,. characterized in that, in order to expand the functional possibilities while simplifying the device, a controllable frequency divider, first and second multiplexers, first and second short pulse drivers and a register, with the output of the reference oscillator, are introduced into it. connected to the input of a controlled frequency divider and the input of the counter, the informational outputs of which are connected to the corresponding control inputs of the multiplexers, the output of the counter is connected to the input of the strobing of the first and second multiplexers whose outputs are connected to the counting inputs of the reversible counter, information the output of which is connected to the register input, the control input of which is connected to the input of the first short pulse generator, the Reset counter input and the output of the second short pulse generator sov, whose input is connected to the inputs of the first gating the second multiplexer, the output of the first short pulse generator is connected to the Reset input of the reversible counter, the even inputs of the first multiplexer are connected to the output of the controlled frequency divider, and each odd input of the second multiplexer is connected to the output of the corresponding input frequency sensor.