SU601623A1 - Effective voltage value voltmeter - Google Patents

Description

one

The invention relates to information measurement technology, can be used in measuring devices and, centralized control systems.

Current voltage voltmeters are known, containing n, rectifiers and high-pass filters fll.

Known voltmeters are constructed according to a complex scheme.

Closest to the proposed voltmeter is an effective voltage value, containing a series-connected computed thermal device and display unit, n rectifiers and n low-pass filters, connected to the corresponding inputs of the computing device 2.

This voltmeter contains a large number of high-pass filters.

The purpose of the invention is to simplify the circuit of a voltmeter.

To achieve this goal, in a voltmeter, the effective voltage value containing a series-connected computing device and display unit, tl

rectifiers and t low-pass filters connected to the corresponding inputs of the computing device, the output of each rectifier is connected to the input of the corresponding low-pass filter and one of the inputs of the subsequent rectifier, the other input of which is connected to the output of the corresponding low-pass filter frequencies.

The block diagram of the device is shown in the drawing.

ten

The voltmeter contains rectifiers 1 -1, low-pass filters, computing device 3 and display unit 4.

The operation of the device is as follows.

five

Claims (2)

The input voltage using rectifier 1 is subjected to full-wave rectification. The rectified voltage and its constant component separated by filter 2 are fed respectively to the inverting and non-inverting inputs of the rectifier IJ, in which the difference of the incoming signals to its inputs, which is the variable component of the output voltage of the rectifier Miguel 1. and there is a full-wave rectification of this difference. With straightening 3. Voltage and isolation using Fnpgra 2 2 its constant co-current is fed to the inverting and non-inverting inputs of rectifier 1, in which the difference of the incoming signals to its input, which is a temporary component of the output voltage, is allocated. rectifier 1, and a full-wave rectifier of this difference occurs, etc. The voltages at the outputs of the low-pass filters are measured by the computing device 3, and the effective value of the input voltage -Ju% and ... where is, and, .., - is determined from them. L. - Voltage at the outputs of low-pass filters. It follows from the above that the simplification is achieved due to the exclusion of high-frequency filters from the circuit of the known voltmeter C-1. Claims of the invention Voltmeter of the current voltage value, containing a series-connected computing device and an indication unit, a rectifier and a low-pass filter, output connected to the corresponding input and the computing device, characterized in that, in order to simplify the circuit, the output of each rectifier is connected to the input of the corresponding low-pass filter and one of the inputs of the subsequent rectifier, the other input of which is connected to the output of the corresponding low-pass filter. Sources of information taken into account in the examination: 1. USSR author's certificate number 463913, G01 TJ 19/02, 1974. 2. Instruments and control systems No. 2, 1975, become A. A. Kuznetsova et al. On one of the methods for measuring the effective voltage value.