SU555396A1 - Device for nonlinearity correction - Google Patents

Description

(54) HOSPITAL FOR CORRECTION OF NONLINEARITY

3

Vain of the measured signal (Ux) and curve 2, the correction function N i; (U); in fig. B-Curve 3 is the characteristic of the time interval (U) formed by the non-temporal frequency.

The device contains a high-speed analog-to-digital converter 1, the input of which is connected to the measured signal and a switching unit 2, one of the inputs of which is connected to the measured signal Ux, another input connected to the reference signal bus ien, and the control input yes analog to digital converter 1; time-pulse converter 3, the input of which is connected to the output of switching unit 2; reversible counter 4, one of the inputs of which is connected to the output of analog-to-digital converter 1, the second input is connected to the output of the And 5 element, and the third input is connected to one of the outputs of software block 6; the output and one of the inputs of the element 5 are connected to the program block 6; The output time of the pulse converter is connected to the second input of the element 5, and the outputs of the group of elements 7–10 are connected to the third input, the first inputs of which are connected respectively to the outputs of the pulse generators 11-14, and the second inputs are connected to the outputs of the program block 6.

The operation of the device is as follows.

Of | 5Src analog signal DX is supplied to the input of the analog-digital converter C operating, for example, according to the bit-rate coding principle, and to one) 1 of the inputs of the switching unit 2, the second input of which is connected to the 1i reference reference source, the output signal of which is equal to nominal the magnitude of the measured signal. The measured signal Ux is generated by analog-to-digital converter I (curve 1, fig. 2, a) and is written off to reversible counter 4. Depending on the state of the highest bit of analog-to-digital converter 1, switching unit 2 is connected to time-to-pulse converter 3 either the measured signal Ux, if this signal measures more than half the nominal value ciioeiO, or the difference between the standard and measured signals UjT-Ux, if measured, 1 is greater than its nominal signal. Vrsm-mimic converter 3 forms a time interval in accordance with curve 3 in FIG. 2, b. Time interval. Sfg) 5Zh1Iirovanny P1) eobravo1) atel 3

is encoded with the element AND 5. The frequency of the coding pulses is changed with the help of npoipaMMHoro of block 6 according to the correction function (curve 2 in Fig. 2, a), which

based on the number of pulses transmitted through the AND 5 element, it gives permission to one of the AND 7-10 elements, the pulses from the corresponding generator 11-14 are supplied to the AND 5 element.

Program block 6 also gives a command to

summation and; w to reversible counter 4.

The use of the reference signal of the switching unit 2, the time of the pulse converter 3 and the new connections favorably distinguishes the correction device from the prototype, due to the fact that, on average, the nonlinearity correction speed of the sensors increases on average, which gives a particularly noticeable reduction in the information processing time in information and measurement systems.

Claims (2)

1. Electronics, M, N 5, 1968, p. 1b. 2. Authors certificate USSR N, 1) bulletin of inventions, No. 10, 1975, pp. Ill (prototype). 1