SU1345129A1 - Frequency relay - Google Patents

Abstract

The invention relates to the field of measurement technology and can be used to control the frequency of rotation of the shaft. The purpose of the invention is to increase the efficiency of the device. The relay contains a driver 1, a coincidence circuit 5, and a controlled frequency oscillator 6. The introduction of the temporary gate 2, the frequency divider ruler 3, the calibration pulse extraction circuit 4 increases the stability. The relay function expands the range. frequency variation rates and simplifies device setup. 2 Il. (L co 4; ate u with srig.1

Description

The invention relates to a measuring technique and can be used to control frequency, for example, the frequency of rotation of a shaft.

The purpose of the invention is to increase the efficiency of the device by increasing the stability of its operation, expanding the range of the rate of change of frequency and simplifying the setting of the device.

FIG. 1 is a functional diagram of a frequency relay; FIG.

2 - time diagrams that show his work.

The ycTpoiiCTBO contains an input driver 1, gate 2, frequency divider 3, calibrated pulse extraction circuit 4, coincidence circuit 5, a controlled oscillator. 6 reference frequency. The output of the input shaper 1 is connected to the first input of the calibrated pulse extraction circuit 4 and to the first input of the matching circuit 5, the output of the calibrated pulse emitter 4 is connected to the first input of the temporary gate 2 and to the second input of the matching circuit 5 connected to the output of the controlled frequency generator 6, the control input of which is connected to the output of the coincidence circuit 5, the output of the temporary gate 2 is connected to the input of the ruler

3 dividers, the output of which is connected to the second input of the calibrated pulse extraction circuit 4.

The device works as follows.

At the output of the input shaper 1, rectangular pulses of positive polarity are formed (Fig. 2.1). following with the frequency of the monitored signal, which are fed to the first input of the calibrated pulse extraction circuit 4 and to the first input of the matching circuit 5. The falling edge of these pulses forms the leading edge of rectangular pulses of positive polarity at the output of the calibrated pulse extraction circuit 4 (Fig. 2.2). With the appearance of the output pulse from the circuit 4, the temporary gate 2 opens at the end of the calibrated pulse and

are the inverted pulses55 of the pulse and the controlled oscillator of the controlled oscillator 6 of the reference frequency, the output of which is the co-frequency (Fig. 2.4), since it is connected to the second time input (Fig. 2.3) of which is connected to the second mouth ruler de-input temporary gate 2. These frequency pulsator is connected to the second

0

five

0

These are fed to the input of the frequency splitter line 3 and, after it has been filled (Fig. 2.5), to the second input of the calibrated pulse 4, while the back of the positive polarity is formed at the output of the calibrated pulsing 4.

Thus, at the second input of the coincidence circuit 5 there is a rectangular calibrated pulse of positive polarity of a certain duration. When the input frequency rises to the setpoint of the frequency relay operation, the formed pulse coincides in time at the output of the extraction pulse calibrator 4 and the output pulse of the input shaper 1 at the inputs of the matching circuit 5, and the logic 1 signal appears at the output of the matching circuit 5 ( 2.6), which is the output of the device, this signal is fed to the control input of the controlled oscillator 6 of the reference frequency, while the frequency of the controlled oscillator 6 of the reference frequency decreases, which is equal to but in this case, the expansion of the output pulse of the calibrated pulse extraction circuit 4 at the instant of the device response, which ensures the stability of the operation of the relay. In this case, the frequency relay returns to its initial state at an input signal frequency slightly less than

setting of the relay itself.

Claims (1)

Invention Formula A frequency relay containing an input driver and a matching circuit, the first input of which is connected to the output of the input driver, the input of which is the input of a frequency relay, the output 5 of which is the output of the matching circuit, in order to increase the efficiency of the device, by increasing the stability of its operation, expanding the range of the rate of change of frequency and simplifying the settings of the device, the temporary gate, the frequency divider ruler, the allocation scheme of the calibrated 0 S 0  1345129 the input of the calibrated input of which is connected to the first pulse input, the output of which is connected to the output of the time gate and second pulse calibrated by the first input, and the output to the control input of the coincidence circuit of the first frequency reference generator. 7 ji ABOUT pn fig, g