RU84991U1 - DEVICE FOR DETERMINING THE PERIOD OF MULTI-FREQUENCY SIGNALS WITH INTERHARMONICS REPRESENTED BY DIGITAL REPORTS - Google Patents

Abstract

A device for determining the period of multi-frequency signals with interharmonics represented by digital samples, characterized in that the sensor of the analyzed signal is connected to the object of study and to the programmer for determining the amplitude value by the current-voltage characteristic, to which the first programmer, the first reference signal sensor, the programmer of the current-voltage characteristic area are connected , a second programmer, a third programmer that is associated with a display or computer, while the first programmer with connected to the third programmer and the fourth programmer, which is connected to the second programmer, the first sensor of the reference signal, the programmer of the area of the current-voltage characteristic and the sensor of the analyzed signal, and the programmer of the amplitude value of the current-voltage characteristic is connected to the second sensor of the reference signal and to the fifth programmer, which is connected to a second reference signal sensor and with a first programmer.

Description

The utility model relates to the field of information processing systems and measuring equipment and can be used to determine the period of a complex signal with non-multiple harmonics in solving various problems of transmitting information over a distance, monitoring the operability of electrical and electromechanical devices.

No device is known for determining the period of multi-frequency signals with interharmonics represented by digital samples.

The objective of the utility model is to determine the period of complex multi-frequency signals containing interharmonics and harmonics of multiple frequencies.

The problem is solved due to the fact that the device for determining the period of multi-frequency signals with interharmonics represented by digital samples contains a sensor of the analyzed signal, which is connected to the object of study and to the programmer for determining the amplitude value by the current-voltage characteristic, to which the first programmer, the first sensor are connected in series the reference signal, the programmer of the current-voltage characteristic area, the second programmer, the third programmer, which is connected with the display or a computer, in this case, the first programmer is connected to the third programmer and to the fourth programmer, which is connected to the second programmer, the first sensor of the reference signal, the programmer of the current-voltage characteristic area and the sensor of the analyzed signal, and the amplitude programmer according to the current-voltage characteristic is connected to the second reference sensor signal and with the five programmer, which is connected to the second sensor of the reference signal and to the first programmer.

The claimed device for determining the period of periodic multi-frequency signals represented by digital samples allows you to determine the period of periodic multi-frequency signals, if there are interharmonics due to the fact that the principle of detecting frequency components is used.

Figure 1 shows the hardware circuit of the device.

The claimed device can be implemented using a circuit (figure 1) containing a sensor of the analyzed signal 1 (DAS), which is connected to the object of study. An analyzer for determining the amplitude value from the current-voltage characteristic 2 (ABAC), the first programmer 3 (P1), the first sensor of the reference signal 4 (DOS1), the programmer of the area of the current-voltage characteristic 5 (PVAC), the second programmer 6 are connected in series to the sensor of the analyzed signal 1 (DAS) (P2), the third programmer 7 (P3), which is associated with a display or computer (not shown in Fig. 1.). The first programmer 3 (P1) is connected to the third programmer 7 (P3) and to the fourth programmer 8 (P4), which is connected to the second programmer 6 (P2), the first reference signal sensor 4 (DOS1), the programmer of the current-voltage characteristic area 5 (PVAC) and the sensor of the analyzed signal 1 (DAS). The amplitude value programmer according to the current-voltage characteristic 2 (ABAC) is connected to the second sensor of the reference signal 9 (DOS2) and to the fifth programmer 10 (P5), which is connected to the second sensor of the reference signal 9 (DOS2) and to the first programmer 3 (P1).

As a sensor of the analyzed signal 1 (DAS), a current sensor can be used - an industrial device KEI-0.1, or a voltage sensor - a voltage transformer (220/5 V). Programmers 3 (P1), 6 (P2), 7 (P3), 8 (P4) and 10 (P5), reference signal sensors 4 (DOS1) and 9 (DOS2), the amplitude value programmer according to the current-voltage characteristic 2 (ABAX) and the programmer of the current-voltage characteristic area 5 (PVAC) can be performed on the microcontroller of the 51 series atmel AT89S53. For user operation, a FT008 button keypad having 8 buttons may be provided.

From the output of the sensor of the analyzed signal 1 (DAS), the initial signal α (t _i ) specified by the samples of instantaneous values at time

t ₁ , t ₂ , ..., t _i , ..., t _N ;

t ₂ -t ₁ = t ₃ -t ₂ = t _N -t _N-1 = ... = Δt;

where Δt is the sampling step;

N is the number of reference points during the sampling signal t _N ,

arrives at the input of the programmer for determining the amplitude value from the current-voltage characteristic 2 (ABAC) and the fourth programmer 8 (P4). For a given range of ω ₀ ... ω _0k ... ω _n with a given frequency step Δω in the fifth programmer 10 (A5), the frequencies ω _{0k are set} in Rad / s, starting from the minimum, and transmitted to the second reference signal sensor 9 (DOC2) and to the first programmer 3 (P1). In the second sensor of the reference signal 9 (DOS2) determine the reference signal b ₀ (t _i ) for the frequency ω _0k

in this case, take ω _0k = -180 ... (φ _0k + Δφ ₀ ) ... 180, the length of the array N and the sampling step Δt are taken equal to the corresponding parameters of the original signal a (t _i ), then the received reference signal b ₀ (t _i ) is fed to a programmer for determining the amplitude value by the current-voltage characteristic 2 (ABAC), where the area of the current-voltage characteristic is determined

determine the amplitude

where f _k is the frequency in Hz.

In the programmer for determining the amplitude value from the current-voltage characteristic 2 (ABAC), the maximum value of the amplitude max [Am _k (φ _0k )], the maximum value of the amplitude Am _k and the corresponding phase value φ _k = φ _0k are transmitted to the first programmer 3 (P1), where they are memorized together with the value of ω _k = ω _0k from the fifth programmer 10 (P5). Immediately after this, a signal is transmitted from the programmer for determining the amplitude value from the current-voltage characteristic 2 (ABAC) to the fifth programmer 10 (P5) about setting the next frequency ω _0k + Δω. All steps to determine Am _k and φ _{k are} repeated until ω _0k = ω _{n is} reached. The maximum amplitude value Am _{max is} determined from the values stored in the first programmer 3 (P1) and the value Am _{max is} transmitted to the third programmer 7 (P3). After the third programmer 7 (P3) receives the value of Am _max , determine the value of the setting

Am _mouth = Am _max · k,

where k is the filtration coefficient in percent,

the value of Am _mouth transmit to the first programmer 3 (P1). In the first programmer 3 (P1) of this, only those frequencies ω _0s and phases φ _0s are selected that correspond to the condition Am _k > Am _mouth , after which each frequency ω _0s , starting from the minimum, is transmitted sequentially to the fourth programmer 8 (P4) and, at the same time, the corresponding ω _0s and φ _0s are transmitted to the first sensor of the reference signal 4 (DOC1), starting with the minimum frequency ω _0s In the fourth programmer 8 (P4), the value

by expression

= trunc (N · f _s · Δt)

Where

form a sequence = 1, 2, ..., w _max , for each value - isolated from the analyzed signal a (t _i ) the investigated part a (t _j ), where ,

transmit a (t _j ) to the programmer of the area of the current-voltage characteristic 5 (PVAC), the values and to the first sensor of the reference signal 4 (DOS1) and the value to the second programmer 6 (P2). Upon receipt of values and , in the first sensor of the reference signal 4 (DOS), a reference signal b ₀ (t _j ) is generated for the frequency ω _0s and phase φ _0s obtained from the first programmer 3 (P1)

and transmit b ₀ (t _j ) ^{to the} programmer of the area of the current-voltage characteristic 5 (PVAC). In the programmer of the area of the current-voltage characteristic 5 (PVAC), after receiving α (t _j ) and b ₀ (t _j ) determine the area of the current-voltage characteristic

and transmit the obtained Q _{BAXS value} to the second programmer 6 (P2), where the corresponding values and Q _BAXS memorize, then transmit the signal to the fourth programmer 8 (P4), after which, increase the value , all actions necessary to determine and Q _{BAXS are} repeated at the new value , until . Once choose value in which Q _BAXS (w _f ) = Q _BAXS (w _f = 1). For the value of w _ω0s determine the period

transmit the values of T _ω0 and ω _0s to the seventh programmer 7 (P3), where the corresponding values , and ω _{0s are} stored. Immediately after receiving , and ω _0s from the third programmer 7 (P3) transmit a signal to the first programmer 3 (P1) to set the next frequency ω _0s and then repeat all the steps to determine , and ω _0s until the frequency ω _0s = ω _n is set in the first programmer 3 (P1). Then, in the third programmer 7 (P3), the obtained values are compared , for different ω _0s, if they are the same, then the result is displayed on the screen or computer, if the values for different ω _0s differ in value, then all actions are repeated to determine the period , at ω _0s , for this, the filtration coefficient k is increased by one and a new value Am _mouth = Am _max * k is determined, which is transmitted to the first programmer 3 (P1). Repeat the increase in the setpoint and the determination of the periods for the found frequencies until they get the same values . The period of the initial signal is judged by the received value .

Claims (1)

A device for determining the period of multi-frequency signals with interharmonics represented by digital samples, characterized in that the sensor of the analyzed signal is connected to the object of study and to the programmer for determining the amplitude value by the current-voltage characteristic, to which the first programmer, the first reference signal sensor, the programmer of the current-voltage characteristic area are connected , a second programmer, a third programmer that is associated with a display or computer, while the first programmer with connected to the third programmer and the fourth programmer, which is connected to the second programmer, the first sensor of the reference signal, the programmer of the area of the current-voltage characteristic and the sensor of the analyzed signal, the programmer of the amplitude value of the voltage-current characteristic connected to the second sensor of the reference signal and to the fifth programmer, which is connected to a second reference signal sensor and with a first programmer.