SU1451733A1 - Integrating device - Google Patents

Abstract

The invention relates to analog computing and can be used in various devices and devices of automation and computing. The purpose of the invention is to simplify the device when squaring the integrand. The device contains an operational amplifier 1, a Hall sensor 2 consisting of a plate 3 and an excitation winding 4 connected between the device input 5 and the inverting input of the operational amplifier 1, the input electrodes of the Hall sensor plate 3 connected by the inverting input and output of the operational amplifier 1. Device allows you to get the square of the integral of the input signal with a decrease in the number of elements, 1 Il. S (l

Description

The invention relates to analog computing and can be used in various devices and instruments for automatic automation, computing and measurements.

The purpose of the invention is to simplify the device when squaring an integral expression.

The drawing shows a diagram of an | θ integrating device for two input signals.

The device comprises an operational amplifier 1, a Hall sensor 2, consisting of a plate 3 and an excitation winding 4 connected between the input 5 of the device and the inverting input of the operational amplifier 1, and the input electrodes of the plate 3 of the Hall 2 sensor are connected between the inverting input and the output of the operational amplifier 1.

The device operates as follows.

Inputs 5 are supplied with input voltage U. The output voltage of the amplifier 1 with feedback (in the feedback circuit there is a plate 3 of the Hall sensor 2) is equal to:

U ₂ (p)

where L is the inductance of the excitation winding 4; R. - input resistance of the Hall sensor 2;

K is the gain of the operational amplifier 1;

p is the Laplace operator.

The current in the excitation winding 4 with a large input resistance of the amplifier 1 is equal to the current flowing through the plate 3 of the Hall sensor 2:

U1 (βί-ιΜβ) ₌ (Kj + jDiMg) r “+ Lp“ (T ~ p + 1) R ~ _g 'where Т _and = (К ^ + 1) ~ is the constant integ ₅₀ ? riirovka.

Moving from the original image, a current is obtained in the excitation winding 4 i = 'K ₅ JU, eft, (1) ⁵⁵ where K, is the conversion coefficient.

The output voltage of the Hall sensor 2 is proportional to the magnetic induction B in the gap of the electromagnet with the field winding 4 and the current through the plate 3, which is equal to the current in the field winding:

UftllX ⁼ J'S, ·> (2) where γ is the sensitivity of the Hall sensor 2.

Magnetic induction B in a straight section of the characteristics of the electromagnet is directly proportional to the current in the field winding:

B = K _M i = k _m k / i, dt, (3) where K _m is the conversion coefficient.

Substituting expression (3) in expression (2), get

U _Sv , x =

Taking γΚ _Μ Κ, = K is the conversion coefficient, have

U _6MX . = K (Ju ^ t) ²

The proposed device allows to obtain the square of the integral of the input signal while reducing the number of elements.

Claims (1)

Claim An integrating device comprising a Hall sensor, the output electrodes of which are the output of the device, and an operational amplifier, the inverting input of which is connected to the input of the device through the excitation winding of the Hall sensor, and the non-inverting input is connected to the zero potential bus, characterized in that, in order to simplify the device, squaring the integrand, the input electrodes of the Hall sensor are connected between the inverting input and the output of the operational amplifier.