SU369498A1 - ALL-UNION - Google Patents

Description

one

The invention relates to the field of electrical measuring equipment.

Digital voltage measurement methods are known based on the use of counters controlling contact switches that switch reference elements.

In order to increase the speed and reliability of the measurement, the proposed method first balances in each discharge with an additional replacement counter that controls the contactless keys that switch the reference elements with weights of this discharge, and the counting pulses are simultaneously fed to the inputs of the additional counter and this counter discharge, the electromechanical keys of which are disconnected for the time of operation of the additional counter, and after balancing in this discharge de off chayut additional counter contactless keys replace the contact keys of the counter discharge are switched and the additional counter for the next discharge.

The essence of the method is as follows.

When operating in each bit, balancing is first performed with an additional counter replacing the main one. This additional counter controls the high-speed contactless keys that switch the model elements with weighting coefficients corresponding to the given bit.

In the process of balancing in each discharge, the pulses that control the meters are simultaneously fed to the inputs of the main and additional meters, so that by the end of the balance in each bit, the main counter contains information about the required combination of sample elements.

At the end of the balancing in each discharge, the contact keys of the main counter are connected in parallel according to the information accumulated in it, and the additional counter is switched to the next decade.

The proposed method makes it possible to reduce the time taken to connect the relays in each discharge, since, in this case, they turn on simultaneously, rather than sequentially in time. This reduces the intensity of the relay, especially a relay with weighting factors I.

In addition, the mentioned additional counter can be used in the last bit of the device, since the keys of the last decade do not have strict requirements.

Subject invention

A digital voltage measurement method based on the use of counters that control contact switches that switch model elements, characterized in that, in order to increase the speed and reliability of the measurement, they first balance each time with an additional replacement counter that controls the contactless keys switching sample elements with

weights of this bit, and the counting pulses are simultaneously supplied to the inputs of the additional counter and the counter of this bit, the contact keys of which are disconnected for the duration of the additional counter, and after balancing in this bit the additional counter is turned off, the contactless keys are replaced by the contact keys of the counter of this bit Yes

and switch the additional counter to the next bit.