SU623161A1 - Measuring rectifier - Google Patents

Description

(34) MEASURING RECTIFIER

I

The invention relates to an electrical measurement.: 1 and computer technology and can be used to measure the actual value of gear and to create quadrants.

A rectifier is known that contains a trio generator; 1 to 10 voltage connected to the secondary point of the secondary winding of a transformer whose primary winding is connected to an input source, two limiters whose outputs are connected to the input of summing-filtering device 11.

The output voltage is proportional to the square of the input signal. Moreover, the triangular signal frequency should

be higher than the input voltage frequency.

A disadvantage of this device is the limited frequency range.

A measuring rectifier containing a triangular voltage generator, a limiter and a summing-filtering device are also known, and the input terminal of the measuring rectifier and the source of the reference voltage, respectively, are connected to the first and second inputs of the limiter and the summing-filtering device.

However, it is a slave (the device doesn’t impair operation stability in the whole range of low and high frequencies due to the appearance of low frequency beats at its output.

The purpose of the invention is to expand the frequency range of measurements.

The aim is achieved by the fact that in the proposed measuring chamber the M11Tel containing a series-connected generator of triangular voltage, a limiter and a sum.miruyushche-fi: 1b; The power supply device, the iris, the input terminal of the measuring rectifier are connected to the first and second inputs of the limiter and the dry-filtering device. and the reference voltage sources, respectively, a series-connected differentiating element and a threshold device connected to the control input of a triangular voltage generator, and the input of the differentiating element connected to the output of the summation-filtering device, the output of which is the output of the measuring rectifier, are inputted.

Claims (2)

The frequency range of the measured voltages is expanded by the introduction of a differentiating element and a threshold device, which eliminates low-frequency beats that occur when the triangular voltage frequencies and the input signal are equal or multiples. The drawing shows a structural diagram of a measuring rectifier. The device consists of a triangular voltage generator 1 connected in series with the first inputs of the limiter 2 and the summing-filtering device 3, the second inputs of the limiter and the summing-filtering device being connected to the rectifier input terminal and the source of the reference signal, respectively. The output of the summing filtering device is the output of the measuring rectifier and is simultaneously connected to the input of the differentiating element 4 connected in series with the threshold device 5, and the output of the latter is connected to the input of the generator I of a triangular voltage. The measuring rectifier works as follows. The triangular signal from the triangular voltage generator 1 and the input signal are fed to the limiter 2, which limits the sum of these signals at the zero BOM level. The output signal of limiter 2 is summed at the sum. Filtering device 3 with a constant signal C / opposite in sign to the output signal of the limiter and equal to 1/4 of the amplitude of the triangular voltage. At the output of the summing filtering device, a constant voltage U ,,,, is proportional to the square of the effective value of the input voltage. The measuring rectifier can operate in two modes: in the first, the frequency of the input signal is lower than the frequency of the triangular voltage, in the second, vice versa. But at frequencies of the input signal f ,, multiple to the frequency of the triangular wave 1, a low-frequency voltage appears at the output of the summing filtering device, which is differentiated by the differentiating element and is fed to the threshold device. If the low-frequency voltage is greater than the threshold of the threshold device, the latter triggers and changes the frequency of the triangular voltage generator, so that the frequency multiplicity is greater than 20. Thus, in the proposed measuring rectifier, low-frequency voltages are automatically eliminated leads to increased stability in a wide frequency range. The invention The measuring rectifier, containing a triangular voltage generator connected in series, a limiter and a summing filtering device, the input terminal of the measuring rectifier and the source of the reference voltage, respectively, being connected to the primary and second inputs of the limiter and summing-filtering device. that, in order to expand the frequency range of the measurement, a serially connected differentiating element and a threshold device, which are connected e to a control input of a triangular voltage generator, and the input of the differentiating element is coupled to the output summiruyuschefiltruyuschego device whose output is the output of the measuring rectifier. Sources of information taken into consideration at examination: 1. Express-information. Seri "Computing Technology, vol. 6, No. 22, 1957. 2. For registration No. 1935066 / 18-10,09.07.74, according to which a positive decision was made to issue an author's certificate.